Name: contact hypersensitivity as a murine model of allergic contact dermatitis
Uploaded: 2022-09-26T15:00:00
Description: Watch this Scientific Journal Video about Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis at JoVE.com

Deze studie werd ondersteund door subsidiëring SUBZ. A020.22.060 van de Medische Universiteit in Wroclaw, Polen, en door subsidies van het ministerie van Wetenschap en Hoger Onderwijs N N401 545940 aan MS en IP2012 0443 72 aan MMS.

Alle experimenten die in dit artikel worden gepresenteerd, zijn uitgevoerd volgens de richtlijnen van de 1e lokale ethische commissie voor dierproeven in Krakau. Alle beschreven procedures werden uitgevoerd volgens de lokale aanbevelingen, vooral met betrekking tot het gebruik van ketamine / xylazine als verdovingsmiddel, het gebruik van beide zijden van de oren om de stof / hapten aan te brengen, het oor af te snijden en bloed te verzamelen door oogbolverwijdering. BALB/c (haplotype H-2d), CBA/J (H-2k</s...

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M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Bleeding+the+laboratory+mouse:+Not+all+methods+are+equal.">Bleeding the laboratory mouse: Not all methods are equal.</a> Experimental Hematology. 44 (2), 132-137 (2016).</li><li>Bedoya, S. K., Wilson, T. D., Collins, E. L., Lau, K., Larkin, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Isolation+and+th17+differentiation+of+na&#239;ve+CD4+T+lymphocytes.">Isolation and th17 differentiation of na&#239;ve CD4 T lymphocytes.</a> Journal of Visualized Experiments. (79), e50765 (2013).</li><li>Hemocytometer - Counting of Cells. Amrita University Available from: <a target="_blank" href="https://www.youtube.com/watch?v=MKS0KM3lr90">https://www.youtube.com/watch?v=MKS0KM3lr90</a> (2011)</li><li>Majewska-Szczepanik, M., Strzepa, A., Marci&#324;ska, K., Wen, L., Szczepanik, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Epicutaneous+immunization+with+TNP-Ig+and+Zymosan+induces+TCR&#945;&#946;++CD4++contrasuppressor+cells+that+reverse+skin-induced+suppression+via+IL-17A.">Epicutaneous immunization with TNP-Ig and Zymosan induces TCR&#945;&#946;+ CD4+ contrasuppressor cells that reverse skin-induced suppression via IL-17A.</a> International Archives of Allergy and Immunology. 164 (2), 122-136 (2014).</li><li>Majewska-Szczepanik, M., Zemelka-Wi&#261;cek, M., Ptak, W., Wen, L., Szczepanik, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Epicutaneous+immunization+with+DNP-BSA+induces+CD4++CD25++Treg+cells+that+inhibit+Tc1-mediated+CS.">Epicutaneous immunization with DNP-BSA induces CD4+ CD25+ Treg cells that inhibit Tc1-mediated CS.</a> Immunology and Cell Biology. 90 (8), 784-795 (2012).</li><li>Directive 2010/63 / EU of the European Parliament and of the Council of 22 September 2010 on the protection of animals used for scientific purposes. Official Journal of the European Union Available from: <a target="_blank" href="https://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:276:0033:0079:En:PDF">https://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:276:0033:0079:En:PDF</a> (2010)</li><li>Colvin, R. B., Dvorak, H. F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Role+of+the+clotting+system+in+cell-mediated+hypersensitivity.+II.+Kinetics+of+fibrinogen/fibrin+accumulation+and+vascular+permeability+changes+in+tuberculin+and+cutaneous+basophil+hypersensitivity+reactions.">Role of the clotting system in cell-mediated hypersensitivity. II. Kinetics of fibrinogen/fibrin accumulation and vascular permeability changes in tuberculin and cutaneous basophil hypersensitivity reactions.</a> Journal of Immunology. 114, 377-387 (1975).</li><li>Szczepanik, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Regulation+of+contact+sensitivity+in+non-obese+diabetic+(NOD)+mice+by+innate+immunity.">Regulation of contact sensitivity in non-obese diabetic (NOD) mice by innate immunity.</a> Contact Dermatitis. 79 (4), 197-207 (2018).</li><li>Askenase, P. W., Majewska-Szczepanik, M., Kerfoot, S., Szczepanik, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Participation+of+iNKT+cells+in+the+early+and+late+components+of+Tc1-mediated+DNFB+contact+sensitivity:+Cooperative+role+of+&#947;&#948;-T+cells.">Participation of iNKT cells in the early and late components of Tc1-mediated DNFB contact sensitivity: Cooperative role of &#947;&#948;-T cells.</a> Scandinavian Journal of Immunology. 73 (5), 465-477 (2011).</li><li>Zemelka-Wi&#261;cek, M., Majewska-Szczepanik, M., Ptak, W., Szczepanik, M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Epicutaneous+immunization+with+protein+antigen+induces+antigen-non-specific+suppression+of+CD8+T+cell+mediated+contact+sensitivity.">Epicutaneous immunization with protein antigen induces antigen-non-specific suppression of CD8 T cell mediated contact sensitivity.</a> Pharmacological Reports. 64 (6), 1485-1496 (2012).</li><li>Van Loveren, H., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Use+of+micrometers+and+calipers+to+measure+various+components+of+delayed-type+hypersensitivity+ear+swelling+reactions+in+mice.">Use of micrometers and calipers to measure various components of delayed-type hypersensitivity ear swelling reactions in mice.</a> Journal of Immunological Methods. 67 (2), 311-319 (1984).</li><li>Tsuji, R. F., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=B+cell-dependent+T+cell+responses:+IgM+antibodies+are+required+to+elicit+contact+sensitivity.">B cell-dependent T cell responses: IgM antibodies are required to elicit contact sensitivity.</a> The Journal of Experimental Medicine. 196 (10), 1277-1290 (2002).</li><li>Campos, R. A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Cutaneous+immunization+rapidly+activates+liver+invariant+Valpha14+NKT+cells+stimulating+B-1+B+cells+to+initiate+T+cell+recruitment+for+elicitation+of+contact+sensitivity.">Cutaneous immunization rapidly activates liver invariant Valpha14 NKT cells stimulating B-1 B cells to initiate T cell recruitment for elicitation of contact sensitivity.</a> The Journal of Experimental Medicine. 198 (12), 1785-1796 (2003).</li><li>R&#252;hl-Muth, A. C., Maler, M. D., Esser, P. R., Martin, S. 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CHS wordt geïnduceerd via haptens, die zich binden aan zelfeiwitantigenen in de huid, waardoor neoantigenen ontstaan. CHS wordt gemedieerd door lokale extravasculaire rekrutering van circulerende antigeenspecifieke CHS-effector T-cellen, wat resulteert in zwelling in het uitgedaagde weefsel, met een piek van 24 uur na blootstelling van de secundaire huid aan dezelfde hapten6. De zwelling van het weefsel wordt voornamelijk veroorzaakt door de infiltratie van leukocyten en leukocytenafhank...

An erratum was issued for:&#160;<a href="https://www.jove.com/t/64329">Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis</a>. The Protocol&#160;and Representative Results sections were updated.
Step 3.2.1 of the Protocol has been updated from:
On day &#34;4&#34;, prepare 0.4% hapten: TNCB in an acetone-ethanol mixture (ratio 1:1). Prepare the solution just before use in a glass vial and protect it from light by covering the vial with aluminum foil.
to:
On day &#34;4&#34;, prepare 0.4% hapten: TNCB in an acetone: olive oil&#160;mixture (ratio 1:1). Prepare the solution just before use in a glass vial and protect it from light by covering the vial with aluminum foil.
Figure 1 of the Representative Results has been updated from:
<img alt="Figure 1" class="xfigimg" src="/files/ftp_upload/64329/64329fig01.jpg" /> 
Figure 1: Induction of CHS. Sensitization, challenge, and ear measurement. Abbreviations: CHS = contact hypersensitivity reaction; TNCB = 2,4,6-trinitrochlorobenzene. <a href="https://www.jove.com/files/ftp_upload/64329/64329fig01large.jpg" target="_blank">Please click here to view a larger version of this figure.</a>
to:
<img alt="Figure 1" class="xfigimg" src="/files/ftp_upload/64329/64329fig1v2.jpg" /> 
Figure 1: Induction of CHS. Sensitization, challenge, and ear measurement. Abbreviations: CHS = contact hypersensitivity reaction; TNCB = 2,4,6-trinitrochlorobenzene. <a href="https://www.jove.com/files/ftp_upload/64329/64329fig1v2large.jpg" target="_blank">Please click here to view a larger version of this figure.</a>
Figure 2 of the Representative Results has been updated from:
<img alt="Figure 2" class="xfigimg" src="/files/ftp_upload/64329/64329fig02.jpg" /> 
Figure 2: Adoptive transfer of the CHS-effector cells. Abbreviations: ALNs =axillary and inguinal lymph nodes; CHS = contact hypersensitivity reaction; i.v. = intravenously; SPLs = spleens; TNCB = 2,4,6-trinitrochlorobenzene. <a href="https://www.jove.com/files/ftp_upload/64329/64329fig02large.jpg" target="_blank">Please click here to view a larger version of this figure.</a>
to:
<img alt="Figure 2" class="xfigimg" src="/files/ftp_upload/64329/64329fig2v2.jpg" /> 
Figure 2: Adoptive transfer of the CHS-effector cells. Abbreviations: ALNs =axillary and inguinal lymph nodes; CHS = contact hypersensitivity reaction; i.v. = intravenously; SPLs = spleens; TNCB = 2,4,6-trinitrochlorobenzene. <a href="https://www.jove.com/files/ftp_upload/64329/64329fig2v2large.jpg" target="_blank">Please click here to view a larger version of this figure.</a>

An erratum was issued for:&#160;<a href="https://www.jove.com/t/64329">Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis</a>. The Protocol&#160;and Representative Results sections were updated.

Erratum: Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis

Allergische contactdermatitis (ACD) is een veel voorkomende huidontstekingsziekte in geïndustrialiseerde landen veroorzaakt door een type IV overgevoeligheidsreactie als gevolg van blootstelling aan chemicaliën met een laag molecuulgewicht die haptens worden genoemd. De stoffen die contactsensibilisatie bij de mens veroorzaken, zijn onder meer zware metaalionen (chroom, nikkel, ijzer, kobalt), terpentijn, geurstoffen, kleurstoffen en conserveermiddelen die aanwezig zijn in cosmetica (bijv. p-fenyleendiamine), sommige geneesmiddelen (bijv. neomycine, benzocaïne), β-lactamantibiotica (d.w.z. penicilline), chemicaliën geproduceerd door planten (pentadecacatechol, een stof die aanwezig is in poison ivy), evenals hydrochinon die wordt gebruikt in de fotografische industrie 1,2 . ACD-etiologische middelen zijn erg hoog, omdat alleen al in de industrie meer dan 100.000 chemicaliën worden gebruikt en elk jaar 2.000 nieuwe worden gesynthetiseerd. Tot op heden zijn meer dan 3.700 moleculen geïdentificeerd die contact haptens/allergenen kunnen zijn3. De contactovergevoeligheidsreactie (CHS) is een experimenteel model van ACD dat kan worden bestudeerd bij muizen, cavia's en ratten en kan worden geïnduceerd door de plaatselijke huidtoepassing van reactieve chemische haptens opgelost in organische oplosmiddelen 4,5,6. Deze studie heeft tot doel een objectieve laboratoriummethode te beschrijven die kan helpen bij het bestuderen van de CHS-reactie bij muizen, die kan worden gemeten en gekwantificeerd door verschillende tests.
Het CHS bestaat uit sensibilisatie (inductie) en effector (challenge) fasen. In diermodellen binden haptens eerst covalent aan eiwitten in het lichaam om neoantigenen te creëren. Tijdens de sensibilisatiefase bevorderen geactiveerde keratinocyten de migratie en rijping van huiddendritische cellen (sDC's) door pro-inflammatoire cytokines-tumornecrosefactor α (TNF-α) en interleukine 1β (IL-1β)7 te produceren. Epidermale Langerhans-cellen (LC's) presenteren antigenen tijdens de CHS-inductie- en effectorfasen8. LCs blootgesteld aan hapten tijdens sensibilisatie bevorderen de inductie van zowel regulerende als effectorcellen9. Toenemend bewijs uit verschillende studies suggereert dat CHS-responsen kunnen worden gemedieerd door CD4 + MHC klasse II-beperkte Th1-cellen, waarbij lokaal interferon-γ (IFN-γ) vrijkomen om een karakteristiek ontstekingsinfiltraat te gebruiken, CD8 + MHC klasse I-beperkte Tc1-lymfocyten die ook IFN-γ kunnen afgeven, maar meestal cytotoxische schade aan keratinocyten kunnen bemiddelen, en nu ook interleukine 17 (IL-17) -producerende Th17-cellen10, 11.
Er zijn verschillende CHS-modellen ontwikkeld met verschillende soorten1 2,13,14 en haptens (een gedetailleerde vergelijking van verschillende haptens, oplosmiddelen en toedieningstijd is samengevat in tabel 1). De muis, een veelgebruikte laboratoriumsoort, biedt een paar voordelen bij het bestuderen van CHS. Er zijn meer stammen, knock-outs (KO) en transgene dieren onder muizen in vergelijking met andere soorten, waardoor ze een zeer aantrekkelijk dierzijn 15. Bovendien vereist het CHS-model veel dieren en zijn muizen hier zuiniger. Diermodellen bootsen ACD niet in alle opzichten na; in het bijzonder vertonen ze korstvorming en desquamatie, wat niet gebruikelijk is voor mensen 16,17. De kenmerken van chronische ziekten zijn een uitdaging om te reproduceren, vooral omdat het beschreven model niet uitgaat van de toepassing van de hapten voor een lange periode van tijd. Hier is echter bevestigd dat veel van de belangrijke aspecten van ACD worden gereproduceerd. Het is ook aangetoond dat, net als bij mensen, deze kenmerken geassocieerd zijn met lokale allergische reacties. De keuze van hapten, het oplosmiddel en de toepassing ervan die in dit protocol wordt beschreven, werden bepaald door het feit dat de resultaten zijn bevestigd door talrijke in vitro tests en dat het vele jaren in het laboratorium is getest en gewijzigd totdat de huidige versie werd vastgesteld. Muizenmodellen maken de analyse mogelijk van de celsubsets of cytokines die betrokken zijn bij de ontwikkeling van ACD en zijn essentieel voor preklinische beoordelingen van nieuwe behandelingen.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>70% ethanol</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>65350-M</td>
			<td>for surface disinfection</td>
		</tr>
		<tr>
			<td>96-well flat-bottom plates, polypropylene</td>
			<td>Greiner Bio-One GmbH, Kremsmunster, Austria</td>
			<td>655101</td>
			<td>for MPO and Evans blue measurement - plates should be made of polypropylene, that has a lower binding capacity so proteins or DNA will not bind</td>
		</tr>
		<tr>
			<td>Acetone (ACS reagent, &#8805;99.5%)</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>179124</td>
			<td></td>
		</tr>
		<tr>
			<td>Aluminum foil</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>Z185140</td>
			<td></td>
		</tr>
		<tr>
			<td>Analytical balance</td>
			<td>Sartorius Weighing Technology GmbH, Goettingen, Germany</td>
			<td>PRACTUM224-1s, 29105177</td>
			<td></td>
		</tr>
		<tr>
			<td>Automated tissue processor</td>
			<td>MediMeas Instruments, Sarsehri, Haryana, India</td>
			<td>MTP-E-212</td>
			<td>automatically prepare tissue samples by fixing, dehydrating, clearing, and infiltrating them with paraffin</td>
		</tr>
		<tr>
			<td>BD Vacutainer SST II Advance (tube with gel for obtaining serum)</td>
			<td>Becton Dickinson (BD), Franklin Lakes, NJ, USA</td>
			<td>BD 366882</td>
			<td></td>
		</tr>
		<tr>
			<td>Bicinchoninic acid kit for protein determination</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>BCA1-1KT</td>
			<td></td>
		</tr>
		<tr>
			<td>Biotin Rat Anti-Mouse IgG1</td>
			<td>Becton Dickinson (BD Biosciences), Franklin Lakes, NJ, USA</td>
			<td>553441</td>
			<td></td>
		</tr>
		<tr>
			<td>BSA (bovine serum albumine)</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>A9418</td>
			<td>protein assays &#38; analysis, 2 mg/mL</td>
		</tr>
		<tr>
			<td>Cell strainer, pore size 70 &#956;m</td>
			<td>BIOLOGIX, China</td>
			<td>15-1070</td>
			<td>suitable for 50 mL tubes</td>
		</tr>
		<tr>
			<td>Coverslip</td>
			<td>VWR, Radnor, Pennsylvania, United States</td>
			<td>631-1583</td>
			<td>24 mm, but it possible to use different size</td>
		</tr>
		<tr>
			<td>Disposable pipettes capacity: 5 mL, 10 mL, 25 mL</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>Z740301, Z740302, Z740303</td>
			<td></td>
		</tr>
		<tr>
			<td>DPBS (Dulbecco&#8242;s phosphate buffered saline)</td>
			<td>ThermoFisher Scientific,&#160; Waltham, Massachusetts, USA</td>
			<td>14190144</td>
			<td>no calcium, no magnesium, mammalian cell culture</td>
		</tr>
		<tr>
			<td>DPX Mountant for histology</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>6522</td>
			<td>mounting media for H-E, might be used some other e.g, Canada balsam</td>
		</tr>
		<tr>
			<td>Dumont 5 tweezers - straight</td>
			<td>Animalab, Poznan, Poland</td>
			<td>11251-10FST</td>
			<td>surgical instruments for procedures on mice (should be steriled)</td>
		</tr>
		<tr>
			<td>Dumont 7 tweezers - bent</td>
			<td>Animalab, Poznan, Poland</td>
			<td>11272-50FST</td>
			<td>surgical instruments for procedures on mice (should be steriled)</td>
		</tr>
		<tr>
			<td>Eosin Y solution, alcoholic</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>HT110116</td>
			<td></td>
		</tr>
		<tr>
			<td>Eppendorf Safe-Lock Tubes 1.5 mL</td>
			<td>Eppenforf, Germany</td>
			<td>3,01,20,086</td>
			<td>polypropylene</td>
		</tr>
		<tr>
			<td>Eppendorf Safe-Lock Tubes, 2.0 mL</td>
			<td>Eppenforf, Germany</td>
			<td>3,01,20,094</td>
			<td>polypropylene, round bottom (the homogenization beads can easily move)</td>
		</tr>
		<tr>
			<td>Ethanol 100% (absolute alkohol)</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>1.07017</td>
			<td></td>
		</tr>
		<tr>
			<td>Ethanol 96%</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>1.59010</td>
			<td></td>
		</tr>
		<tr>
			<td>Evans blue</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>E2129</td>
			<td></td>
		</tr>
		<tr>
			<td>FBS (fetal bovine serum)</td>
			<td>ThermoFisher Scientific, Waltham, Massachusetts, USA</td>
			<td>A3160802</td>
			<td></td>
		</tr>
		<tr>
			<td>Formalin solution, neutral buffered, 10%</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>HT501128</td>
			<td></td>
		</tr>
		<tr>
			<td>Formamide 99.5% (GC)</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>F7503</td>
			<td></td>
		</tr>
		<tr>
			<td>Freezer -20 &#176;C</td>
			<td>Bosch, Germany</td>
			<td>GSN54AW30</td>
			<td></td>
		</tr>
		<tr>
			<td>Fridge +4 &#176;C / freezer -20 &#176;C</td>
			<td>Bosch, Germany</td>
			<td>KGV36V10</td>
			<td>mammalian Cell Culture, qualified, Brazil, 10 x 50 mL</td>
		</tr>
		<tr>
			<td>Glass microskope slides, SuperFrost Plus</td>
			<td>VWR, Radnor, Pennsylvania, United States</td>
			<td>631-0108, 631-0446, 631-0447, 631-0448, 631-0449</td>
			<td>Slides that eliminates the need to apply adhesive materials or protein coatings, to preventing any tissue sections loss during staining.</td>
		</tr>
		<tr>
			<td>Graph Pad Prism</td>
			<td>GraphPad Software Inc.</td>
			<td>v. 9.4.0</td>
			<td></td>
		</tr>
		<tr>
			<td>Grey soap</td>
			<td>Pollena Ostrzesz&#243;w, Producent Chemii Gospodarczej Sp. Z.o.o. , Sp. K., Poland</td>
			<td>Bialy jelen soap bar</td>
			<td>grey Soap Bar Natural Hypoallergenic. Generally available product</td>
		</tr>
		<tr>
			<td>H2SO4 (sulfuric acid) 1 mol/l (1 M)</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>1.60313</td>
			<td></td>
		</tr>
		<tr>
			<td>Harris hematoxylin solution</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>HHS16</td>
			<td></td>
		</tr>
		<tr>
			<td>Hemocytometer</td>
			<td>VWR, Avantor, U.S.A</td>
			<td>612-5719</td>
			<td>manual counting chamber is recommend, which is more accurate</td>
		</tr>
		<tr>
			<td>Hexadecyltrimethylammonium bromide</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>H5882</td>
			<td></td>
		</tr>
		<tr>
			<td>Homogenizer</td>
			<td>QIAGEN Hilden, Germany</td>
			<td>Tissue Lyser LT, SN 23.1001/05234</td>
			<td>homogenizer with stainless steel beads (diameter 5 mm) for 2 mL centrifuge tubes</td>
		</tr>
		<tr>
			<td>Horseradish peroxidase streptavidin (HRP streptavidin)</td>
			<td>Vector Laboratories, Inc., Burlingame, CA, USA</td>
			<td>SA-5004-1</td>
			<td></td>
		</tr>
		<tr>
			<td>Hydrogen peroxide solution (H202)</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>H1009</td>
			<td></td>
		</tr>
		<tr>
			<td>Incubator Heracell 150i</td>
			<td>Thermo Electron LED Gmbh, Germany</td>
			<td>41071068</td>
			<td>37 oC in the atmosphere of 5 % CO2, and 65 0C for deparaffinization the sections for histology</td>
		</tr>
		<tr>
			<td>Ketamine 100 mg/mL, solution for injection</td>
			<td>Biowet Pulawy Sp. z o.o., Pulawy, Poland</td>
			<td>cat.# not avaliable</td>
			<td></td>
		</tr>
		<tr>
			<td>KH2PO4 (potassium dihydrogen phosphate) 99.995% anhydrous basis</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>1.05108</td>
			<td></td>
		</tr>
		<tr>
			<td>Laboratory Centrifuge</td>
			<td>Heraeus Megafuge 1.0R, Thermo Scientific, Germany</td>
			<td>B00013899</td>
			<td>speed to 300 x g, with cooling to 4 0C</td>
		</tr>
		<tr>
			<td>Laboratory Centrifuge</td>
			<td>Heraeus Fresco 21, Thermo Scientific, Germany</td>
			<td>75002425</td>
			<td>speed to 3,000 x g, with cooling to 4 0C</td>
		</tr>
		<tr>
			<td>Mask (FFP2)</td>
			<td>VWR, Radnor, Pennsylvania, United States</td>
			<td>111-0917</td>
			<td>for working with ortho-dianisine dihydrochloride</td>
		</tr>
		<tr>
			<td>Mice</td>
			<td>Breeding unit of the Chair of Biomedical Sciences, Faculty of Health Sciences, Jagiellonian University Medical College, Krakow, Poland</td>
			<td>CBA/J, C57BL/6</td>
			<td></td>
		</tr>
		<tr>
			<td>Micrometer</td>
			<td>Mitutoyo, Tokyo, Japan</td>
			<td>193-111</td>
			<td>digit Outside Micrometer, Ratchet Stop, 0-25mm Range, 0.001mm Graduation, +/-0.002mm Accuracy, https://shop.mitutoyo.pl/web/mitutoyo/pl_PL/all/all/Mikrometr%20analogowy%20/PR/193-111/index.xhtml&#160;&#160;</td>
		</tr>
		<tr>
			<td>microplate, 96 well, microlon, high binding (for ELISA test)</td>
			<td>Greiner Bio-One GmbH, Kremsmunster, Austria</td>
			<td>655061</td>
			<td>with maxi-sorp binding surfaces for reliable and reproducible results in colormetric assays</td>
		</tr>
		<tr>
			<td>Microscope with objectives</td>
			<td>Leica Microsystems CMS GmbH, Germany</td>
			<td>DM1000, 294011-082007</td>
			<td>histology presented in the paper was performed under ThermoFisher Scientific EVOS M5000 Imaging System, with objectives: FL 20X LWDPH, 0.40NA/3.1WD and FL 40X LWDPH 0.65NA/1.79WD</td>
		</tr>
		<tr>
			<td>Myeloperoxidase from human leukocytes (MPO standard)</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>M6908</td>
			<td></td>
		</tr>
		<tr>
			<td>Na2HPO4 x 7 H2O (sodium phosphate dibasic heptahydrate)</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>S9390</td>
			<td></td>
		</tr>
		<tr>
			<td>Olive-oil</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>75343</td>
			<td>pure, natural</td>
		</tr>
		<tr>
			<td>OptEIA Mouse IFN-&#947; ELISA Set</td>
			<td>Becton Dickinson (BD Biosciences), Franklin Lakes, NJ, USA</td>
			<td>555138</td>
			<td></td>
		</tr>
		<tr>
			<td>Ortho-dianisine dihydrochloride</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>D3252</td>
			<td></td>
		</tr>
		<tr>
			<td>Paraffin wax</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>76242</td>
			<td>beads, waxy solid</td>
		</tr>
		<tr>
			<td>PBS (phosphate buffered saline)</td>
			<td>ThermoFisher Scientific,&#160; Waltham, Massachusetts, USA</td>
			<td>20012027</td>
			<td>pH 7.2, mammalian cell culture</td>
		</tr>
		<tr>
			<td>ph meter</td>
			<td>Elmetron, Poland</td>
			<td>CP-401</td>
			<td></td>
		</tr>
		<tr>
			<td>Pipettes, variable volume with tips</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>EP3123000900-1EA</td>
			<td>3-pack, Option 1, 0.5-10 uL/10-100 uL/100-1000 uL, includes epT.I.P.S.</td>
		</tr>
		<tr>
			<td>Razor blade</td>
			<td>VWR, Radnor, Pennsylvania, United States</td>
			<td>PERS94-0462</td>
			<td>scraper and cutter blades, single edge, aluminium spine, 100 blades per box, individually wrapped</td>
		</tr>
		<tr>
			<td>Rotary microtome</td>
			<td>MRC Laboratory-Instruments, Essex, CM20 2HU UK</td>
			<td>HIS-202A</td>
			<td></td>
		</tr>
		<tr>
			<td>Scissors - straight, sharp / sharp</td>
			<td>Animalab, Poznan, Poland</td>
			<td>14060-10FST</td>
			<td>Surgical instruments for procedures on mice (should be steriled)</td>
		</tr>
		<tr>
			<td>Screw cap (open top)</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>27056</td>
			<td>black polypropylene hole cap, for use with 22&#160;mL vial with 20-400 thread</td>
		</tr>
		<tr>
			<td>Spectrophotometer</td>
			<td>BioTek Instruments, U.S.A</td>
			<td>201446</td>
			<td>universal microplate spectrophotometer: &#955; range: 200 - 999 nm, absorbance measurement range: 0.000 - 4.000 Abs</td>
		</tr>
		<tr>
			<td>Staining dish 20 slides with rack</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>S6141</td>
			<td>e.g. 20 slide staining dishes complete with covers, slide rack and handle</td>
		</tr>
		<tr>
			<td>Sterile Disposable Biopsy Punch 6mm</td>
			<td>Integra LifeSciences, Princeton, NJ, USA</td>
			<td>33-36</td>
			<td></td>
		</tr>
		<tr>
			<td>Surgical scissors</td>
			<td>Animalab, Poznan, Poland</td>
			<td>52138-46</td>
			<td>surgical instruments for procedures on mice (should be steriled)</td>
		</tr>
		<tr>
			<td>Tissue processing cassettes</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>Z672122</td>
			<td>tissue processing/ embedding cassettes with lid</td>
		</tr>
		<tr>
			<td>TMB Substrate Reagent Set</td>
			<td>Becton Dickinson (BD Biosciences), Franklin Lakes, NJ, USA</td>
			<td>555214</td>
			<td></td>
		</tr>
		<tr>
			<td>TNCB (2,4,6-trinitrochlorobenzene)</td>
			<td>Tokyo Chemical Industry CO., LTD, Japan</td>
			<td>C0307</td>
			<td></td>
		</tr>
		<tr>
			<td>TNP-BSA (bovine serum albumin conjugated with 2,4,6-trinitrophenyl)</td>
			<td>Biosearch Technologies LGC, Petaluma, CA, USA</td>
			<td>T-5050</td>
			<td></td>
		</tr>
		<tr>
			<td>T-PER (tissue protein extration reagent)</td>
			<td>ThermoFisher Scientific, Waltham, Massachusetts, USA</td>
			<td>78510</td>
			<td></td>
		</tr>
		<tr>
			<td>Tubes 15 mL sterile</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>CLS430055 (Corning)</td>
			<td>polypropylene, conical bottom</td>
		</tr>
		<tr>
			<td>Tubes 50 mL, sterile</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>CLS430290 (Corning)</td>
			<td>polypropylene, conical bottom</td>
		</tr>
		<tr>
			<td>Tween 20</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>P1379</td>
			<td></td>
		</tr>
		<tr>
			<td>Vials, screw top, clear glass (vial only) 22 mL</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>27173</td>
			<td>for the preparation of hapten, screwed on so that it does not evaporate</td>
		</tr>
		<tr>
			<td>Water bath</td>
			<td>AJL Electronic, Poland</td>
			<td>LW102</td>
			<td></td>
		</tr>
		<tr>
			<td>Wax (paraffin) dispenser</td>
			<td>VWR, Radnor, Pennsylvania, United States</td>
			<td>114-8737</td>
			<td></td>
		</tr>
		<tr>
			<td>Xylazine (xylapan 20 mg/mL) solution for injection</td>
			<td>Vetoquinol Biowet Sp. z o.o., Gorzow Wielkopolski, Poland</td>
			<td>cat.# not avaliable</td>
			<td></td>
		</tr>
		<tr>
			<td>Xylene (histological grade)</td>
			<td>Merck KGaA, Darmstadt, Germany</td>
			<td>534056</td>
			<td></td>
		</tr>
	</tbody>
</table>

contact hypersensitivity as a murine model of allergic contact dermatitis

Contactovergevoeligheid (CHS) is een experimenteel model van allergische contactdermatitis (ACD) dat kan worden bestudeerd bij muizen. Deze studie heeft tot doel een objectieve laboratoriummethode te presenteren die kan helpen bij het bestuderen van de CHS-reactie bij muizen, die kan worden gemeten en gekwantificeerd door verschillende tests. Om CHS te induceren, werden muizen op dag "0" op een eerder geschoren plek gesensibiliseerd door buikhuid te schilderen met het hapten 2,4,6-trinitrochlorobenzeen (TNCB) in een aceton-ethanolmengsel, terwijl negatieve controlemuizen werden gesensibiliseerd met een voertuig-aceton-ethanolmengsel. Op dag "4" werd de oordikte gemeten met een micrometer voorafgaand aan de elicitatie van CHS (challenge) door beide oren te schilderen met verdunde TNCB zowel in de test- als in de controlegroep. Na 24 uur werd de oorzwelling gemeten met een micrometer. CHS is een voorbeeld van een T-cel-gemedieerde immuunrespons die zwelling veroorzaakt in ontstoken weefsel, met een piek van 24 uur na de huiduitdaging met dezelfde hapten. Een toename van ooroedeem gecorreleerd met verhoogd oorgewicht, myeloperoxidase (MPO) activiteit, pro-inflammatoire cytokineconcentratie in de oorextracten, verhoogde verdikking van de oedemateuze dermis in het histologisch onderzoek en oor vasculaire permeabiliteit. Er was ook een toename van de concentratie van TNP-specifieke IgG1-antilichamen in de sera van de testgroep in vergelijking met de controlemuizen. Bovendien kan CHS met succes worden overgedragen met de CHS-effectorcellen die zijn verkregen van donoren die eerder zijn gesensibiliseerd met TNCB. De CHS-effectorcellen werden intraveneus toegediend aan naïeve ontvangende muizen, die vervolgens werden uitgedaagd met dezelfde verdunde hapten. Oorzwelling werd 24 uur later gemeten met een micrometer.

Voor CHS-inductie werden de dieren gesensibiliseerd via huidverf (buik) met 150 μL van 5% TNCB of schijnsensibiliseerd met het voertuig alleen. Op dag "4" werden de oorzwellingsreacties van beide oren geïnduceerd door contactverf (challenge) met 10 μL van 0,4% TNCB bij beide muizen die eerder contact hadden met TNCB (testgroep) en de controlegroepmuizen (schijnsensibiliseerd). De gepresenteerde gegevens laten zien dat de muizen die gesensibiliseerd waren met TNCB en 4 dagen later werden uitgedaagd, een signif...

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Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis

Contactovergevoeligheid (CHS) is een muizenexperimenteel model van allergische contactdermatitis (ACD). CHS is gebaseerd op sensibilisatie met reactieve hapten door de geschoren huid van de borst en buik te schilderen, met een daaropvolgende oorhuiduitdaging met een verdunde hapten, waardoor een zwellingsreactie ontstaat die op verschillende manieren wordt beoordeeld.

Contactovergevoeligheid als een muizenmodel van allergische contactdermatitis

Contact hypersensitivity (CHS) is an experimental model of allergic contact dermatitis (ACD) that can be studied in mice. This study aims to present an ...

Een objectieve laboratoriummethode die hier wordt gepresenteerd, kan helpen bij het bestuderen van de contactovergevoeligheidsreactie bij muizen, die allergische contactdermatitis bij mensen nabootst. De contactovergevoeligheidsreactie kan niet alleen worden gemeten door ooroedeem, maar ook door verschillende laboratoriumtests die de studie van cellulaire mechanismen die bij deze reactie betrokken zijn, mogelijk maken. Het meer in-contact overgevoeligheidsmodel kan verschillende omgevingsfactoren en nieuwe stoffen testen om aan te tonen of geteste factoren T-celafhankelijke immuunresponsen moduleren, die kunnen worden gebruikt om nieuwe therapieën te implementeren.Begin met het scheren van de muizenhuid met een scheermesje en het labelen van de poot. Breng zes uur voor de inductie van contactovergevoeligheid, of CHS, grijze zeep aan met water en scheer een vierkant gebied van twee centimeter op de borst en buik van de muis. Sensibiliseer de muizen op dezelfde dag door 150 microliter vers bereide 5% hapten op de eerder geschoren plek aan te brengen.Pas in de bedieningsmuis alleen het voertuig toe. Droog de haptenplek gedurende 30 seconden voordat u het dier terug in de kooi plaatst. Meet op dag vier de oordikte van een verdoofde muis met behulp van een micrometer op nul uur door een waarnemer die zich niet bewust is van de experimentele groepen.Breng vervolgens 10 microliter vers bereide 04% hapten aan beide zijden van de oren aan in test- en controlegroepen en laat het 30 seconden drogen. Op dag vijf, 24 uur na de vorige 0,4% hapten-toepassing, herhaalt u de meting van de oordikte voor de 24-uursmeting. 24 uur na de oordiktemeting, wanneer de muis nog steeds in diepe anesthesie is, snijdt u de oren zo dicht mogelijk bij de schedel af met een schaar.Aan de distale kant van de oren, Maak een pons met een diameter van zes millimeter met behulp van een biopsiepons. Meet het gewicht van elke oorbiopsie op de analytische balans en druk het uit in milligrammen. Voor de myeloperoxidase, of MPO, assay, plaats de oorbiopten in een microcentrifugebuis van twee milliliter met roestvrijstalen kralen en voeg 500 microliter van de voorbereide buffer toe.Homogeniseer de biopten gedurende 10 minuten in een homogenisator en koel het monster vervolgens gedurende 15 minuten af bij 4 graden Celsius voordat u het opnieuw gedurende 10 minuten homogeniseert. Haal de kralen eruit zodra biopten zijn gehomogeniseerd. Vries de homogenaten 30 minuten in bij min 20 graden Celsius.Ontdooi en draai de monsters en herhaal de homogenisatie- en vriesprocedure drie keer. Als u klaar bent, centrifugeert u het homogenaat op 3.000 G gedurende 30 minuten bij 4 graden Celsius. Oogst het supernatant met een pipet om de MPO-activiteit te meten en druk deze uit in eenheden per eiwit van één milligram.Om een vasculaire permeabiliteitstest uit te voeren, sensibiliseert u muizen op dag nul en op dag vier direct uitdagen door hapten op de oren aan te brengen met behulp van de eerder genoemde procedure. Injecteer 23 uur later intraveneus 8,3 microliter per gram lichaamsgewicht van 1% Evans blauwe kleurstof in Dulbecco's fosfaat gebufferde zoutoplossing, of DPBS, in de verdoofde muis. Na een uur de muis opnieuw verdoven om de oorbiopten te verzamelen, zoals eerder beschreven.Om de kleurstof uit het weefsel te extraheren, incubeert u de biopsieën in de buizen met één milliliter formamide bij 37 graden Celsius in een atmosfeer van 5% koolstofdioxide gedurende 18 uur. Na het verzamelen van oorbiopten, wanneer de muis nog steeds onder diepe anesthesie is, verwijdert u de oogbol met een pincet. Oefen zachte druk uit op de muis en verzamel bloed uit de retro-orbitale sinus in de buis voor serumverzameling.Keer de buis zes keer om en wacht 30 minuten tot het bloed stolt. Centrifugeer vervolgens de buis op 1, 300 tot 2.000 G gedurende 10 minuten bij kamertemperatuur. Sensibiliseer de donormuizen met TNCB hapten op dag nul met behulp van de eerder genoemde procedure Op dag vier, na het desinfecteren van de huid, isoleert u de oksel- en inguinale lymfeklieren, of ALN's, van de verdoofde muis met behulp van een tang, gevolgd door het isoleren van de milt.Pureer het weefsel tussen de berijpte uiteinden van twee microscoopglaasjes en passeer de celsuspensie door een celzeef met een poriegrootte van 70 micrometer. Was vervolgens de cellen met DPBS aangevuld met 1% foetaal runderserum en centrifugeer ze op 300 G gedurende 10 minuten bij vier graden Celsius. Decanteer het supernatant en resuspensie de resterende celkorrel in één tot vijf milliliter DPBS.Bereid een 1:1 mengsel van ALN's en milt om een concentratie tot 7,0 maal 10 tot de zevende cellen in 200 microliter DBPS te bereiken voordat u het mengsel van CHS-effectorcellen intraveneus injecteert in een verdoofde muis. Meet de oordikte op nul uur en na 24 uur van de uitdaging. De gegevens toonden aan dat muizen die gevoelig waren voor TNCB en vier dagen later in de oren werden uitgedaagd, een aanzienlijk verhoogde zwelling van het oor ontwikkelden, vergeleken met schijngevoelige en vervolgens op dezelfde manier uitgedaagde controlemuizen.De toename van ooroedeem in de testgroep resulteerde in een verhoogd oorgewicht, MPO-activiteit, interferon gammaconcentratie in de oorextracten, oedemateuze dermisveranderingen in het histologisch onderzoek en vasculaire permeabiliteit van het oor De TNP-specifieke IgG1-antilichamen waren verhoogd in de sera van de testmuizen in vergelijking met de controledieren. De dieren die de CHS-effectorcellen ontvingen van donoren die eerder met TNCB waren gesensibiliseerd, vertoonden een significant verhoogde zwelling van het oor, vergeleken met dieren die de cellen niet hebben ontvangen. Het meest kritieke moment is het triggeren van contactovergevoeligheid.Hapten-oplossing is zeer vluchtig en lichtgevoelig, dus het moet snel op de huid van de dieren worden aangebracht. Aanvullende tests kunnen worden uitgevoerd op de geïsoleerde effectorcellen. Celculturen kunnen bijvoorbeeld worden vastgesteld om het vermogen om te prolifereren in aanwezigheid van antigenen te beoordelen.

contact-hypersensitivity-as-murine-model-allergic-contact

Research

JoVE Journal

Immunology and Infection

Recognition of Epidermal Transglutaminase by IgA and Tissue Transglutaminase 2 Antibodies in a Rare Case of Rhesus Dermatitis

Tissue transglutaminase 2 (tTG2) is an intestinal digestive enzyme which deamidates already partially digested dietary gluten e.g. gliadin peptides. In genetically predisposed individuals, tTG2 triggers autoimmune responses that are characterized by the production of tTG2 antibodies and their direct deposition into small intestinal wall 1,2. The presence of such antibodies constitutes one of the major hallmarks of the celiac disease (CD). Epidermal transglutaminase (eTG) is another member of the transglutaminase family that can also function as an autoantigen in a small minority of CD patients. In these relatively rare cases, eTG triggers an autoimmune reaction (a skin rash) clinically known as dermatitis herpetiformis (DH). Although the exact mechanism of CD and DH pathogenesis is not well understood, it is known that tTG2 and eTG share antigenic epitopes that can be recognized by serum antibodies from both CD and DH patients 3,4.
In this study, the confocal microscopy examination of biopsy samples from skin lesions of two rhesus macaques (Macaca mulatta) with dermatitis (Table 1, Fig. 1 and 2) was used to study the affected tissues. In one animal (EM96) a spectral overlap of IgA and tTG2 antibodies (Fig. 3) was demonstrated. The presence of double-positive tTG2+IgA+ cells was focused in the deep epidermis, around the dermal papillae. This is consistent with lesions described in DH patients 3. When EM96 was placed on a gluten-free diet, the dermatitis, as well as tTG2+IgA+ deposits disappeared and were no longer detectable (Figs. 1-3). Dermatitis reappeared however, based on re-introduction of dietary gluten in EM96 (not shown). In other macaques including animal with unrelated dermatitis, the tTG2+IgA+ deposits were not detected. Gluten-free diet-dependent remission of dermatitis in EM96 together with presence of tTG2+IgA+ cells in its skin suggest an autoimmune, DH-like mechanism for the development of this condition. This is the first report of DH-like dermatitis in any non-human primate.

Recognition of Epidermal Transglutaminase by IgA and Tissue Transglutaminase 2 Antibodies in a Rare Case of Rhesus Dermatitis

Dermatitis herpetiformis (DH) is a chronic inflammatory condition characterized by an autoimmune reaction between IgA and epidermal transglutaminase (eTG). DH develops in a very small portion of gluten-sensitive and/or celiac patients. The results of this study indicate that DH can also develop in a rhesus monkey host with symptoms of idiopatic dermatitis.

Erkenning van Epidermale Transglutaminase door IgA en tissue transglutaminase 2 antilichamen in een zeldzaam geval van Rhesus Dermatitis

Tissue transglutaminase 2 (tTG2) is an intestinal digestive enzyme which deamidates already partially digested dietary gluten e.g. gliadin peptides. In ...

Introducing Shear Stress in the Study of Bacterial Adhesion

During bacterial infections a sequence of interactions occur between the pathogen and its host. Bacterial adhesion to the host cell surface is often the initial and determining step of the pathogenesis. Although experimentally adhesion is mostly studied in static conditions adhesion actually takes place in the presence of flowing liquid. First encounters between bacteria and their host often occur at the mucosal level, mouth, lung, gut, eye, etc. where mucus flows along the surface of epithelial cells. Later in infection, pathogens occasionally access the blood circulation causing life-threatening illnesses such as septicemia, sepsis and meningitis. A defining feature of these infections is the ability of these pathogens to interact with endothelial cells in presence of circulating blood. The presence of flowing liquid, mucus or blood for instance, determines adhesion because it generates a mechanical force on the pathogen. To characterize the effect of flowing liquid one usually refers to the notion of shear stress, which is the tangential force exerted per unit area by a fluid moving near a stationary wall, expressed in dynes/cm2. Intensities of shear stress vary widely according to the different vessels type, size, organ, location etc. (0-100 dynes/cm2). Circulation in capillaries can reach very low shear stress values and even temporarily stop during periods ranging between a few seconds to several minutes 1. On the other end of the spectrum shear stress in arterioles can reach 100 dynes/cm2 2. The impact of shear stress on different biological processes has been clearly demonstrated as for instance during the interaction of leukocytes with the endothelium 3. To take into account this mechanical parameter in the process of bacterial adhesion we took advantage of an experimental procedure based on the use of a disposable flow chamber 4. Host cells are grown in the flow chamber and fluorescent bacteria are introduced in the flow controlled by a syringe pump. We initially focused our investigations on the bacterial pathogen Neisseria meningitidis, a Gram-negative bacterium responsible for septicemia and meningitis. The procedure described here allowed us to study the impact of shear stress on the ability of the bacteria to: adhere to cells 1, to proliferate on the cell surface 5and to detach to colonize new sites 6 (Figure 1). Complementary technical information can be found in reference 7. Shear stress values presented here were chosen based on our previous experience1 and to represent values found in the literature. The protocol should be applicable to a wide range of pathogens with specific adjustments depending on the objectives of the study.

During the infection process, a key step is the adhesion of pathogens with host cells. In most instances this adhesion step occurs in the presence of mechanical stress generated by flowing liquid. We describe a technique that introduces shear stress as an important parameter in the study of bacterial adhesion.

Introductie van Shear Stress in de studie van bacteriële hechting

During bacterial infections a sequence of interactions occur between the pathogen and its host. Bacterial adhesion to the host cell surface is often the ...

Basophil Activation Test for Investigation of IgE-Mediated Mechanisms in Drug Hypersensitivity

Hypersensitivity reactions against non-steroidal anti-inflammatory drugs (NSAIDs) like propyphenazone (PP) and diclofenac (DF) can manifest as Type I-like allergic reactions 1. In clinical practice, diagnosis of drug hypersensitivity is mainly performed by patient history, as skin testing is not reliable and oral provocation testing bears life-threatening risks for the patient 2. Hence, evidence for an underlying IgE-mediated pathomechanism is hard to obtain. 
Here, we present an in vitro method based on the use of human basophils derived from drug-hypersensitive patients that mimics the allergic effector reaction in vivo. As basophils of drug-allergic patients carry IgE molecules specific for the culprit drug, they become activated upon IgE receptor crosslinking and release allergic effector molecules. The activation of basophils can be monitored by the determination of the upregulation of CD63 surface expression using flow cytometry 3. 
In the case of low molecular weight drugs, conjugates are designed to enable IgE receptor crosslinking on basophils. As depicted in Figure 1, two representatives of NSAIDs, PP and DF, are covalently bound to human serum albumin (HSA) via a carboxyl group reacting with the primary amino group of lysine residues. DF carries an intrinsic carboxyl group and, thus, can be used directly 4, whereas a carboxyl group-containing derivative of PP had to be organochemically synthesized prior to the study 1.
The coupling degree of the low molecular weight compounds on the protein carrier molecule and their spatial distribution is important to guarantee crosslinking of two IgE receptor molecules. The here described protocol applies high performance-size exclusion chromatography (HPSEC) equipped with a sequential refractive index (RI) and ultra violet (UV) detection system for determination of the coupling degree.
As the described methodology may be applied for other drugs, the basophil activation test (BAT) bears the potential to be used for the determination of IgE-mediated mechanisms in drug hypersensitivity. Here, we determine PP hypersensitivity as IgE-mediated and DF hypersensitivity as non-IgE-mediated by BAT.

Basophil activation test is a potent tool for the detection of IgE-dependent allergies in vitro. Here, an optimized protocol for basophil activation test is used to investigate drug hypersensitivity. A method for the efficient production of covalent drug-protein conjugates and their physicochemical characterization is described.

Basofiel activatie test voor Onderzoek van IgE-gemedieerde mechanismen in Drug Overgevoeligheid

Hypersensitivity reactions against non-steroidal anti-inflammatory drugs (NSAIDs) like propyphenazone (PP) and diclofenac (DF) can manifest as Type I-like ...

Induction of Graft-versus-host Disease and In Vivo T Cell Monitoring Using an MHC-matched Murine Model

Graft-versus-host disease (GVHD) is the limiting barrier to the broad use of bone marrow transplant as a curative therapy for a variety of hematological deficiencies. GVHD is caused by mature alloreactive T cells present in the bone marrow graft that are infused into the recipient and cause damage to host organs. However, in mice, T cells must be added to the bone marrow inoculum to cause GVHD. Although extensive work has been done to characterize T cell responses post transplant, bioluminescent imaging technology is a non-invasive method to monitor T cell trafficking patterns in vivo. 
Following lethal irradiation, recipient mice are transplanted with bone marrow cells and splenocytes from donor mice. T cell subsets from L2G85.B6 (transgenic mice that constitutively express luciferase) are included in the transplant. By only transplanting certain T cell subsets, one is able to track specific T cell subsets in vivo, and based on their location, develop hypotheses regarding the role of specific T cell subsets in promoting GVHD at various time points. At predetermined intervals post transplant, recipient mice are imaged using a Xenogen IVIS CCD camera. Light intensity can be quantified using Living Image software to generate a pseudo-color image based on photon intensity (red = high intensity, violet = low intensity). 
Between 4-7 days post transplant, recipient mice begin to show clinical signs of GVHD. Cooke et al.1 developed a scoring system to quantitate disease progression based on the recipient mice fur texture, skin integrity, activity, weight loss, and posture. Mice are scored daily, and euthanized when they become moribund. Recipient mice generally become moribund 20-30 days post transplant. 
Murine models are valuable tools for studying the immunology of GVHD. Selectively transplanting particular T cell subsets allows for careful identification of the roles each subset plays. Non-invasively tracking T cell responses in vivo adds another layer of value to murine GVHD models.

Induction of Graft-versus-host Disease and In Vivo T Cell Monitoring Using an MHC-matched Murine Model

Murine bone marrow transplantation is a widely used technique to study immunological mechanisms governing graft-versus-host disease in humans. The ability to monitor T cell trafficking patterns in vivo allows for detailed analysis of the development and perpetuation of T cell responses during graft-versus-host disease.

Inductie van Graft-versus-host ziekte en<em&gt; In Vivo</em&gt; T-cel monitoren door gebruik van een MHC-matched muizenmodel

Graft-versus-host disease (GVHD) is the limiting barrier to the broad use of bone marrow transplant as a curative therapy for a variety of hematological ...

Measurement of Tactile Allodynia in a Murine Model of Bacterial Prostatitis

Uropathogenic Escherichia coli (UPEC) are pathogens that play an important role in urinary tract infections and bacterial prostatitis1. We have recently shown that UPEC have an important role in the initiation of chronic pelvic pain2, a feature of Chronic prostatitis/Chronic pelvic pain syndrome (CP/CPPS)3,4. Infection of the prostate by clinically relevant UPEC can initiate and establish chronic pain through mechanisms that may involve tissue damage and the initiation of mechanisms of autoimmunity5.
A challenge to understanding the pathogenesis of UPEC in the prostate is the relative inaccessibility of the prostate gland to manipulation. We utilized a previously described intraurethral infection method6 to deliver a clinical strain of UPEC into male mice thereby establishing an ascending infection of the prostate. Here, we describe our protocols for standardizing the bacterial inoculum7 as well as the procedure for catheterizing anesthetized male mice for instillation of bacteria.
CP/CPPS is primarily characterized by the presence of tactile allodynia4. Behavior testing was based on the concept of cutaneous hyperalgesia resulting from referred visceral pain8-10. An irritable focus in visceral tissues reduces cutaneous pain thresholds allowing for an exaggerated response to normally non-painful stimuli (allodynia). Application of normal force to the skin result in abnormal responses that tend to increase with the intensity of the underlying visceral pain. We describe methodology in NOD/ShiLtJ mice that utilize von Frey fibers to quantify tactile allodynia over time in response to a single infection with UPEC bacteria.

Infection of the prostate may be a contributing factor in mediating pelvic pain in chronic prostatitis. We describe the procedure for preparation of standardized bacterial inoculum, instillation of bacteria into the urethra of male mice and methodology for measuring tactile allodynia in mice over time.

Meting van Tactiele allodynie in een muizenmodel van bacteriële prostatitis

Uropathogenic Escherichia coli (UPEC) are pathogens that play an important role in urinary tract infections and bacterial prostatitis1. We have recently ...

Use of Galleria mellonella as a Model Organism to Study Legionella pneumophila Infection

Legionella pneumophila, the causative agent of a severe pneumonia named Legionnaires&#39; disease, is an important human pathogen that infects and replicates within alveolar macrophages. Its virulence depends on the Dot/Icm type IV secretion system (T4SS), which is essential to establish a replication permissive vacuole known as the Legionella containing vacuole (LCV). L. pneumophila infection can be modeled in mice however most mouse strains are not permissive, leading to the search for novel infection models. We have recently shown that the larvae of the wax moth Galleria mellonella are suitable for investigation of L. pneumophila infection. G. mellonella is increasingly used as an infection model for human pathogens and a good correlation exists between virulence of several bacterial species in the insect and in mammalian models. A key component of the larvae&#39;s immune defenses are hemocytes, professional phagocytes, which take up and destroy invaders. L. pneumophila is able to infect, form a LCV and replicate within these cells. Here we demonstrate protocols for analyzing L. pneumophila virulence in the G. mellonella model, including how to grow infectious L. pneumophila, pretreat the larvae with inhibitors, infect the larvae and how to extract infected cells for quantification and immunofluorescence microscopy. We also describe how to quantify bacterial replication and fitness in competition assays. These approaches allow for the rapid screening of mutants to determine factors important in L. pneumophila virulence, describing a new tool to aid our understanding of this complex pathogen.

Use of Galleria mellonella as a Model Organism to Study Legionella pneumophila Infection

The larva of the wax moth Galleria mellonella was recently established as an in vivo model to study Legionella pneumophila infection. Here, we demonstrate fundamental techniques to characterize the pathogenesis of Legionella in the larvae, including inoculation, measurement of bacterial virulence and replication as well as extraction and analysis of infected hemocytes.

Gebruik<em&gt; Galleria mellonella</em&gt; Als modelorganisme om te studeren<em&gt; Legionella pneumophila</em&gt; Infectie

Legionella pneumophila, the causative agent of a severe pneumonia named Legionnaires&#39; disease, is an important human pathogen that infects and ...

Organoids as Model for Infectious Diseases: Culture of Human and Murine Stomach Organoids and Microinjection of Helicobacter Pylori

Recently infection biologists have employed stem cell derived cultures to answer the need for new and better models to study host-pathogen interactions. Three cellular sources have been used: Embryonic stem cells (ESC), induced pluripotent stem cells (iPSC) or adult stem cells. Here, culture of mouse and human gastric organoids derived from adult stem cells is described and used for infection with the gastric pathogen Helicobacter pylori. Human gastric glands are isolated from resection material, seeded in a basement matrix and embedded in medium containing growth factors epidermal growth factor (EGF), R-spondin, Noggin, Wnt, fibroblast growth factor (FGF) 10, gastrin and transforming growth factor (TGF) beta inhibitor. In these conditions, gastric glands grow into 3-dimensional organoids containing 4 lineages of the stomach. The organoids expand indefinitely and can be frozen and thawed similarly as cell lines. For infection studies, bacteria are microinjected into the lumen of the organoids. Infected organoids are processed for imaging. The described methods can be adapted to other organoids and infections with other bacteria, viruses or parasites. This allows the study of infection-induced changes in primary cells.

Stem cell derived cultures harbor tremendous potential to model infectious diseases. Here, the culture of mouse and human gastric organoids derived from adult stem cells is described. The organoids are microinjected with the gastric pathogen Helicobacter pylori.

Organoids als model voor Infectieziekten: cultuur van de mens en muizen Maag Organoids en Micro-injectie van Helicobacter pylori

Recently infection biologists have employed stem cell derived cultures to answer the need for new and better models to study host-pathogen interactions. ...

Zebrafish as a Model to Assess the Teratogenic Potential of Nitrite

High nitrate levels in the environment may&#160;result in congenital defects or miscarriages in humans. Presumably, this is due to the conversion of nitrate to nitrite by gut and salivary bacteria. However, in other mammalian studies, high nitrite levels do not cause birth defects, although they can lead to poor reproductive outcomes. Thus, the teratogenic potential of nitrite is not clear. It would be useful to have a vertebrate model system to easily assess teratogenic effects of nitrite or any other chemical of interest. Here, we demonstrate the utility of zebrafish (Danio rerio) to screen compounds for toxicity and embryonic defects. Zebrafish embryos are fertilized externally and have rapid development, making them a good model for teratogenic studies. We show that increasing the time of exposure to nitrite negatively affects survival. Increasing the concentration of nitrite also adversely affects survival, whereas nitrate does not. For embryos that survive nitrite exposure, various defects can occur, including pericardial and yolk sac&#160;edema, swim bladder noninflation, and craniofacial malformation. Our results indicate that the zebrafish is a convenient system for studying the teratogenic potential of nitrite. This approach can easily be adapted to test other chemicals for their effects on early vertebrate development.

Exposure to teratogens may cause birth defects. Zebrafish are useful for determining the teratogenic potential of chemicals. We demonstrate the utility of zebrafish by exposing embryos to various levels of nitrite and also at different times of exposure. We show that nitrite can be toxic and cause severe developmental defects.

Zebravis als een model om de teratogene potentie van nitriet Assess

High nitrate levels in the environment may&#160;result in congenital defects or miscarriages in humans. Presumably, this is due to the conversion of ...

A Murine Model of Group B Streptococcus Vaginal Colonization

Streptococcus agalactiae (group B Streptococcus, GBS), is a Gram-positive, asymptomatic colonizer of the human gastrointestinal tract and vaginal tract of 10 - 30% of adults. In immune-compromised individuals, including neonates, pregnant women, and the elderly, GBS may switch to an invasive pathogen causing sepsis, arthritis, pneumonia, and meningitis. Because GBS is a leading bacterial pathogen of neonates, current prophylaxis is comprised of late gestation screening for GBS vaginal colonization and subsequent peripartum antibiotic treatment of GBS-positive mothers. Heavy GBS vaginal burden is a risk factor for both neonatal disease and colonization. Unfortunately, little is known about the host and bacterial factors that promote or permit GBS vaginal colonization. This protocol describes a technique for establishing persistent GBS vaginal colonization using a single &#946;-estradiol pre-treatment and daily sampling to determine bacterial load. It further details methods to administer additional therapies or reagents of interest and to collect vaginal lavage fluid and reproductive tract tissues. This mouse model will further the understanding of the GBS-host interaction within the vaginal environment, which will lead to potential therapeutic targets to control maternal vaginal colonization during pregnancy and to prevent transmission to the vulnerable newborn. It will also be of interest to increase our understanding of general bacterial-host interactions in the female vaginal tract.

A Murine Model of Group B Streptococcus Vaginal Colonization

The purpose of this protocol is to imitate human group B Streptococcus (GBS) vaginal colonization in a murine model. This method may be used to investigate host immune responses and bacterial factors contributing to GBS vaginal persistence, as well as to test therapeutic strategies.

Een muizenmodel van groep B<em&gt; Streptococcus</em&gt; Vaginale Kolonisatie

Streptococcus agalactiae (group B Streptococcus, GBS), is a Gram-positive, asymptomatic colonizer of the human gastrointestinal tract and vaginal tract of ...

Effects of Exposure of Formaldehyde to a Rat Model of Atopic Dermatitis Induced by Neonatal Capsaicin Treatment

Atopic dermatitis is chronically relapsing pruritic eczema and prevails around the world especially in developed countries. Complex interactions between genetic and environmental factors are known to play an important role in the pathophysiology of atopic dermatitis. However, we still lack a detailed picture of the pathogenesis of this disease. Thus, it is of importance to develop appropriate animal models for elucidating the progression of atopic dermatitis. Moreover, investigating the effect of environmental factors such as air pollutants on atopic dermatitis expands understanding of the disease. Here, we describe a method for inducing atopic dermatitis in rats with neonatal capsaicin treatment and a protocol for exposure of a constant concentration of formaldehyde to rats to reveal effects on the development of atopic dermatitis in infantile and adolescent periods. These protocols have been successfully applied to several experiments and can be used for other substances.

We describe here methods for neonatal capsaicin treatment to induce atopic dermatitis in rats and exposure of vaporized formaldehyde to investigate the effects of formaldehyde inhalation on atopic dermatitis.

Effecten van blootstelling van Formaldehyde aan een Rat Model van atopische Dermatitis veroorzaakt door neonatale capsaïcine behandeling

Atopic dermatitis is chronically relapsing pruritic eczema and prevails around the world especially in developed countries. Complex interactions between ...