Name: Forfatter Spotlight: Ny analyse for å studere B-celleresponser i multippel skleroseforskning
Uploaded: 2023-12-01T14:30:00
Description: Watch this Scientific Journal Video about Quantification of Autoreactive Antibodies in Mice upon Experimental Autoimmune Encephalomyelitis at JoVE.com

Denne studien ble støttet av National Institutes of Health (R03NS131908) og Department of Defense gjennom Multiple Sclerosis Research Program under Award No. W81XWH-22-1-0517. Meninger, tolkninger, konklusjoner og anbefalinger er forfatterens og er ikke nødvendigvis godkjent av Forsvarsdepartementet. Denne studien ble også støttet av East Carolina University oppstartsfond.

Alle prosedyrer som involverte mus ble utført i samsvar med eksperimentelle retningslinjer godkjent av East Carolina University Institutional Animal Care and Use Committee (IACUC). Wildtype C57BL/6J hunnmus mellom 8-10 ukers alder ble brukt i denne studien. Dyrene ble hentet fra en kommersiell kilde (se Materialfortegnelse). EAE ble indusert etter tidligere publiserte rapporter 12,13,14.
<p class="jove_titl...

Undersøkelse av humorær respons ved autoimmun demyelinisering

<ol>
	<li>Reich, D. S., Lucchinetti, C. F., Calabresi, P. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Multiple+sclerosis.">Multiple sclerosis.</a> N Engl J Med. 378 (2), 169-180 (2018).</li><li>Baranzini, S. E., 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+repertoire+diversity+and+clonal+expansion+in+multiple+sclerosis+brain+lesions.">B cell repertoire diversity and clonal expansion in multiple sclerosis brain lesions.</a> J Immunol. 163 (9), 5133-5144 (1999).</li><li>Genain, C. P., Cannella, B., Hauser, S. L., Raine, C. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Identification+of+autoantibodies+associated+with+myelin+damage+in+multiple+sclerosis.">Identification of autoantibodies associated with myelin damage in multiple sclerosis.</a> Nat Med. 5 (2), 170-175 (1999).</li><li>Ma, Q., 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=Specific+hypomethylation+programs+underpin+b+cell+activation+in+early+multiple+sclerosis.">Specific hypomethylation programs underpin b cell activation in early multiple sclerosis.</a> Proc Natl Acad Sci U S A. 118 (51), e2111920118 (2021).</li><li>Hauser, S. L., 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=Ocrelizumab+versus+interferon+beta-1a+in+relapsing+multiple+sclerosis.">Ocrelizumab versus interferon beta-1a in relapsing multiple sclerosis.</a> N Engl J Med. 376 (3), 221-234 (2017).</li><li>Montalban, X., 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=Ocrelizumab+versus+placebo+in+primary+progressive+multiple+sclerosis.">Ocrelizumab versus placebo in primary progressive multiple sclerosis.</a> N Engl J Med. 376 (3), 209-220 (2017).</li><li>Didonna, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Preclinical+models+of+multiple+sclerosis:+Advantages+and+limitations+towards+better+therapies.">Preclinical models of multiple sclerosis: Advantages and limitations towards better therapies.</a> Curr Med Chem. 23 (14), 1442-1459 (2016).</li><li>Steinman, L., Zamvil, S. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=How+to+successfully+apply+animal+studies+in+experimental+allergic+encephalomyelitis+to+research+on+multiple+sclerosis.">How to successfully apply animal studies in experimental allergic encephalomyelitis to research on multiple sclerosis.</a> Ann Neurol. 60 (1), 12-21 (2006).</li><li>Khare, P., 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=Myelin+oligodendrocyte+glycoprotein-specific+antibodies+from+multiple+sclerosis+patients+exacerbate+disease+in+a+humanized+mouse+model.">Myelin oligodendrocyte glycoprotein-specific antibodies from multiple sclerosis patients exacerbate disease in a humanized mouse model.</a> J Autoimmun. 86, 104-115 (2018).</li><li>Marta, C. B., Oliver, A. R., Sweet, R. A., Pfeiffer, S. E., Ruddle, N. H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Pathogenic+myelin+oligodendrocyte+glycoprotein+antibodies+recognize+glycosylated+epitopes+and+perturb+oligodendrocyte+physiology.">Pathogenic myelin oligodendrocyte glycoprotein antibodies recognize glycosylated epitopes and perturb oligodendrocyte physiology.</a> Proc Natl Acad Sci U S A. 102 (39), 13992-13997 (2005).</li><li>Flach, A. C., 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=Autoantibody-boosted+t-cell+reactivation+in+the+target+organ+triggers+manifestation+of+autoimmune+cns+disease.">Autoantibody-boosted t-cell reactivation in the target organ triggers manifestation of autoimmune cns disease.</a> Proc Natl Acad Sci U S A. 113 (12), 3323-3328 (2016).</li><li>Didonna, 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=Ataxin-1+regulates+b+cell+function+and+the+severity+of+autoimmune+experimental+encephalomyelitis.">Ataxin-1 regulates b cell function and the severity of autoimmune experimental encephalomyelitis.</a> Proc Natl Acad Sci U S A. 117 (38), 23742-23750 (2020).</li><li>Didonna, 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=Sex-specific+tau+methylation+patterns+and+synaptic+transcriptional+alterations+are+associated+with+neural+vulnerability+during+chronic+neuroinflammation.">Sex-specific tau methylation patterns and synaptic transcriptional alterations are associated with neural vulnerability during chronic neuroinflammation.</a> J Autoimmun. 101, 56-69 (2019).</li><li>Ma, Q., Matsunaga, A., Ho, B., Oksenberg, J. R., Didonna, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Oligodendrocyte-specific+argonaute+profiling+identifies+micrornas+associated+with+experimental+autoimmune+encephalomyelitis.">Oligodendrocyte-specific argonaute profiling identifies micrornas associated with experimental autoimmune encephalomyelitis.</a> J Neuroinflammation. 17 (1), 297 (2020).</li><li>Lanz, T. V., 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=Clonally+expanded+b+cells+in+multiple+sclerosis+bind+ebv+ebna1+and+glialcam.">Clonally expanded b cells in multiple sclerosis bind ebv ebna1 and glialcam.</a> Nature. 603 (7900), 321-327 (2022).</li></ol>

Her ble en enkel og effektiv ELISA-basert protokoll rapportert for å kvantifisere den humorale responsen nøyaktig i en relevant dyremodell av MS-patologi. Denne metoden har nylig blitt brukt til å beskrive den nye rollen til ataxin-1-proteinet i å kontrollere serumnivåene av autoantistoffer i MOG35-55/C57BL6J EAE-paradigmet12. I denne forbindelse bør en rekke faktorer tas i betraktning for å oppnå konsistente og biologisk meningsfulle resultater med denne metoden.
<p class="jove_conten...

Multippel sklerose (MS) er en kronisk autoimmun sykdom i sentralnervesystemet (CNS) preget av fokal infiltrasjon av immunceller i hjernens parenkym, nedbrytning av myelinskjeder, innpakningsaksoner, gliaaktivering og nevrontap1. I tillegg til den veletablerte rollen som patogene T-celler, har flere bevislinjer fremhevet involvering av B-celler i formidling av den autoimmune responsen mot CNS. B-celler gjennomgår klonal ekspansjon i MS-hjernen og antistoffer mot myelinkomponenter er påvist i demyeliniserte lesjoner 2,3. Den selektive aktiveringen av perifere B-celler ved sykdomsdebut er nylig dokumentert, noe som tyder på en antatt rolle for dette immuncellerommet i sykdomsinitiering også4. Suksessen til B-cellenedbrytende terapier som anti-CD20 monoklonale antistoffer bekrefter ytterligere den mekanistiske forbindelsen mellom avvikende B-cellefunksjon og autoimmun demyelinisering 5,6. Fra et molekylært synspunkt kan B-celler bidra til sykdom via autoantigenpresentasjon, proinflammatorisk cytokinsekresjon og autoreaktiv antistoffproduksjon.
Flere dyremodeller har blitt utviklet for å rekapitulere spesifikke egenskaper ved den komplekse MS-fenotypen. Blant dem er eksperimentell autoimmun encefalomyelitt (EAE) det mest brukte in vivo-paradigmet og er avhengig av immunisering av forsøksdyr med korte peptider avledet fra myelinproteiner som myelinoligodendrocyttglykoprotein (MOG) og myelinbasisk protein (MBP)7. EAE-immuniserte dyr utvikler en demyeliniserende patologi som ligner MS i mange aspekter, inkludert en robust humoral respons mot encefalittogent peptid8. Av denne grunn har EAE-studier vært medvirkende til å dissekere funksjonen til B-celler og autoantistoffer i sammenheng med sykdom. For eksempel ble det demonstrert at MOG-spesifikke antistoffer isolert fra MS-pasienter kan forverre det kliniske forløpet i EAE-modeller9. Spesielt ble prolinresten i posisjon 42 i human MOG vist å være kritisk for bestemmelse av autoantistoffpatogenisitet10. Mer nylig har MOG-spesifikke autoantistoffer blitt funnet å fremme sykdom, ikke bare ved å formidle myelintap, men også ved å øke reaktiveringen av autoreaktive T-celler i CNS11. 
Tatt i betraktning viktigheten av antistoffresponser ved CNS-autoimmunitet, presenterer denne artikkelen en ELISA-basert protokoll for effektivt å måle serumnivåene av autoreaktive antistoffer i C57BL/6J-mus EAE immunisert med MOG35-55-peptid. I første del av protokollen beskrives metoden for å samle serum via intrakardial punksjon. Deretter vil prosedyrene for å sette opp ELISA-analysen og skaffe dataene bli detaljert. Til slutt vil dataanalyse og tolkning bli diskutert.

<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>1 mL syringes</td>
			<td>BD Biosciences</td>
			<td>309628</td>
			<td></td>
		</tr>
		<tr>
			<td>1.5 mL microcentrifuge tubes</td>
			<td>Fisher</td>
			<td>05-408-129</td>
			<td></td>
		</tr>
		<tr>
			<td>25 G needles</td>
			<td>BD Biosciences</td>
			<td>305122</td>
			<td></td>
		</tr>
		<tr>
			<td>3,3&#39;,5,5&#39;-tetramethylbenzidine (TMB) substrate</td>
			<td>Thermo Fisher</td>
			<td>N301</td>
			<td>Store at 4 &#176;C</td>
		</tr>
		<tr>
			<td>Adhesive seals</td>
			<td>Thermo Fisher</td>
			<td>AB0558</td>
			<td></td>
		</tr>
		<tr>
			<td>Bovine serum albumin (BSA)</td>
			<td>Sigma</td>
			<td>A7906</td>
			<td>Store at 4 &#176;C</td>
		</tr>
		<tr>
			<td>C57BL/6J female mice</td>
			<td>The Jackson Laboratory</td>
			<td>000664</td>
			<td>Animals between 8-10 weeks of age should be used for EAE experiments</td>
		</tr>
		<tr>
			<td>Cryogenic tubes</td>
			<td>Fisher</td>
			<td>10-500-25</td>
			<td></td>
		</tr>
		<tr>
			<td>Dissection tray</td>
			<td>Fisher</td>
			<td>S111022</td>
			<td></td>
		</tr>
		<tr>
			<td>Dissector scissors</td>
			<td>Fine Science Tools</td>
			<td>14082-09</td>
			<td></td>
		</tr>
		<tr>
			<td>ELISA coating buffer</td>
			<td>BioLegend</td>
			<td>421701</td>
			<td>Store at 4&#176;C</td>
		</tr>
		<tr>
			<td>Excel software</td>
			<td>Microsoft</td>
			<td></td>
			<td>Analysis spreadsheet</td>
		</tr>
		<tr>
			<td>Forceps</td>
			<td>Fine Science Tools</td>
			<td>11152-10</td>
			<td></td>
		</tr>
		<tr>
			<td>Goat Anti-Mouse IgG, Human ads-HRP</td>
			<td>SouthernBiotech</td>
			<td>1030-05</td>
			<td>Store at 4 &#176;C</td>
		</tr>
		<tr>
			<td>LED light source</td>
			<td>Fisher</td>
			<td>AMPSILED21</td>
			<td></td>
		</tr>
		<tr>
			<td>Microplate reader</td>
			<td>Fisher</td>
			<td>14-377-575&#160;</td>
			<td></td>
		</tr>
		<tr>
			<td>Molecular biology grade water</td>
			<td>Corning</td>
			<td>46-000-Cl</td>
			<td></td>
		</tr>
		<tr>
			<td>Mouse MOG35-55 peptide</td>
			<td>EZBiolab</td>
			<td>cp7203</td>
			<td>Store at -80 &#176;C</td>
		</tr>
		<tr>
			<td>Multichannel pipette</td>
			<td>Axygen</td>
			<td>AP-12-200-P</td>
			<td></td>
		</tr>
		<tr>
			<td>Noyes spring scissors</td>
			<td>Fine Science Tools</td>
			<td>15011-12</td>
			<td></td>
		</tr>
		<tr>
			<td>Nunc MaxiSorp 96-well plates</td>
			<td>BioLegend</td>
			<td>423501</td>
			<td></td>
		</tr>
		<tr>
			<td>Orbital shaker</td>
			<td>Fisher</td>
			<td>88-861-023</td>
			<td></td>
		</tr>
		<tr>
			<td>Oven</td>
			<td>VWR</td>
			<td>445-0024</td>
			<td></td>
		</tr>
		<tr>
			<td>Phosphate buffer saline (PBS)</td>
			<td>Thermo Fisher</td>
			<td>14190144</td>
			<td></td>
		</tr>
		<tr>
			<td>Refrigerated tabletop centrifuge</td>
			<td>Thermo Fisher</td>
			<td>75002441</td>
			<td></td>
		</tr>
		<tr>
			<td>Stop solution</td>
			<td>Thermo Fisher</td>
			<td>N600</td>
			<td></td>
		</tr>
		<tr>
			<td>Tween 20</td>
			<td>Bio-Rad</td>
			<td>1706531</td>
			<td></td>
		</tr>
	</tbody>
</table>

quantification of autoreactive antibodies in mice upon experimental autoimmune encephalomyelitis

Eksperimentell autoimmun encefalopati (EAE) er en sykdomsmodell som rekapitulerer den autoimmune sykdommen multippel sklerose (MS) på histopatologisk og molekylært nivå. EAE induseres ved immunisering av forsøksdyr via subkutan injeksjon av korte myelinpeptider sammen med spesifikke hjelpestoffer for å øke immunresponsen. Som den menneskelige motparten utvikler EAE-mus demyeliniserende lesjoner, immuncelleinfiltrasjon i sentralnervesystemet (CNS), gliaaktivering og nevronskade. En konsistent mengde bevis støtter også en mekanistisk rolle for B-celledysfunksjon i etiologien til både MS og EAE. B-celler kan tjene som antigenpresenterende celler, så vel som en primær kilde til proinflammatoriske cytokiner og autoantistoffer. I EAE genereres antistoffer mot myelinpeptidene som ble brukt til å indusere sykdommen. Slike autoantistoffer har vist seg å mediere enten myelintap eller patogen T-cellereaktivering i CNS. Denne artikkelen beskriver en effektiv ELISA-basert protokoll for å kvantifisere autoantistoffer i serum av C57BL / 6J-mus immunisert med myelinoligodendrocyttglykoprotein 35-55 (MOG35-55) peptid. Den foreslåtte metoden tjener som et kraftig verktøy for å undersøke spesifisiteten og størrelsen på den avvikende humorale responsen i sammenheng med autoimmun demyelinisering.

Multiple sclerosis (MS) is a chronic autoimmune disease of the central nervous system (CNS) characterized by focal infiltration of immune cells into the brain parenchyma, breakdown of myelin sheaths wrapping axons, glia activation, and neuronal loss1. In addition to the well-established role of pathogenic T cells, multiple lines of evidence have highlighted the involvement of B cells in mediating the autoimmune response against the CNS. B cells undergo clonal expansion in the MS brain and antibodies against myelin components have been detected within demyelinated lesions2,3. The selective activation of peripheral B cells at disease onset has been recently documented, suggesting a putative role for this immune cell compartment in disease initiation as well4. The success of B cell-depleting therapies such as anti-CD20 monoclonal antibodies further corroborates the mechanistic connection between aberrant B cell functioning and autoimmune demyelination5,6. From a molecular standpoint, B cells can contribute to disease via autoantigen presentation, pro-inflammatory cytokine secretion, and autoreactive antibody production.
Multiple animal models have been developed to recapitulate specific features of the complex MS phenotype. Among them, experimental autoimmune encephalomyelitis (EAE) is the most widely used in vivo paradigm and relies on the immunization of experimental animals with short peptides derived from myelin proteins such as myelin oligodendrocyte glycoprotein (MOG) and myelin basic protein (MBP)7. EAE immunized animals develop a demyelinating pathology that resembles MS in many aspects, including a robust humoral response against the encephalitogenic peptide8. For this reason, EAE studies have been instrumental in dissecting the function of B cells and autoantibodies in the context of disease. For instance, it was demonstrated that MOG-specific antibodies isolated from MS patients can aggravate the clinical course in EAE models9. Notably, the proline residue at position 42 in human MOG was shown to be critical for determining autoantibody pathogenicity10. More recently, MOG-specific autoantibodies have been found to promote disease not only by mediating myelin loss but also via boosting the reactivation of autoreactive T cells within the CNS11. 
Considering the importance of antibody responses in CNS autoimmunity, this article presents an ELISA-based protocol to efficiently measure the serum levels of autoreactive antibodies in C57BL/6J mice EAE immunized with MOG35-55 peptide. In the first part of the protocol, the method to collect serum via intracardiac puncture will be described. Subsequently, the procedures to set up the ELISA assay and acquire the data will be detailed. Lastly, data analysis and interpretation will be discussed.

Forfatter Spotlight: Ny analyse for å studere B-celleresponser i multippel skleroseforskning

Kvantifisering av autoreaktive antistoffer hos mus ved eksperimentell autoimmun encefalomyelitt

So the focus of our laboratory is to understand the molecular basis of multiple sclerosis, a immune disease of the central nervous system that is characterized by demyelination, neuroinflammation, and axonal injury. So this protocol represent an economical and flexible alternatives to commercial kits. Our can be easily adjusted to test B-cell antibody responses against different EEA peptides.My lab is devoted to further understanding the connection between neuroinflammation and neurodegeneration in chronic neurological diseases such as multiple sclerosis.

For å demonstrere robustheten til den nåværende ELISA-analysen ble metoden testet på serumprøver isolert fra en kohort av C57BL/6J hunnmus ved 20 dager etter immunisering (dpi) med 100 μg MOG35-55 peptid i komplett Freunds adjuvans (CFA) etter en validert EAE-induksjonsprotokoll 12,13,14. Dyrene fikk også 400 ng kikhostetoksin på dag 0 og 2. Serumprøver fra mock immuniserte dyr med alt, men uten peptidet, tjente som neg...

Watch this Scientific Journal Video about Quantification of Autoreactive Antibodies in Mice upon Experimental Autoimmune Encephalomyelitis at JoVE.com

Eksperimentell autoimmun encefalomyelitt (EAE) er en dyremodell av multippel sklerose (MS), som deler med den menneskelige sykdommen en robust humoral autoimmun respons. Her rapporterer vi en enkel og fleksibel ELISA-protokoll for å kvantifisere autoantistoffer i serum hos EAE-immuniserte mus.

Experimental autoimmune encephalomyelitis (EAE) is a disease model that recapitulates the autoimmune disorder multiple sclerosis (MS) at histopathological ...

Så fokuset på laboratoriet vårt er å forstå det molekylære grunnlaget for multippel sklerose, en immunsykdom i sentralnervesystemet som er preget av demyelinisering, nevroinflammasjon og aksonal skade. Så denne protokollen representerer et økonomisk og fleksibelt alternativ til kommersielle sett. Våre kan enkelt justeres for å teste B-celleantistoffresponser mot forskjellige EØS-peptider.Laboratoriet mitt er viet til å forstå sammenhengen mellom nevroinflammasjon og nevrodegenerasjon i kroniske nevrologiske sykdommer som multippel sklerose.

quantification-autoreactive-antibodies-mice-upon-experimental

Research

JoVE Journal

Immunology and Infection

Quantification of Autoreactive Antibodies in Mice upon Experimental Autoimmune Encephalomyelitis

Experimental autoimmune encephalomyelitis (EAE) is a disease model that recapitulates the autoimmune disorder multiple sclerosis (MS) at histopathological and molecular levels. EAE is induced by immunizing experimental animals via subcutaneous injection of short myelin peptides together with specific adjuvants to boost the immune response. Like the human counterpart, EAE mice develop demyelinating lesions, immune cell infiltration into the central nervous system (CNS), glia activation and neuronal injury. A consistent body of evidence also supports a mechanistic role for B cell dysfunction in the etiology of both MS and EAE. B cells can serve as antigen-presenting cells as well as a primary source of pro-inflammatory cytokines and autoantibodies. In EAE, antibodies are generated against the myelin peptides that were employed to induce the disease. Such autoantibodies have been shown to mediate either myelin loss or pathogenic T cell reactivation into the CNS. This article describes an efficient ELISA-based protocol to quantify autoantibodies in the serum of C57BL/6J mice immunized with the myelin oligodendrocyte glycoprotein 35-55 (MOG35-55) peptide. The proposed method serves as a powerful tool to investigate the specificity and magnitude of the aberrant humoral response in the context of autoimmune demyelination.

Experimental autoimmune encephalomyelitis (EAE) is an animal model of multiple sclerosis (MS), which shares with the human disease a robust humoral autoimmune response. Here, we report a simple and flexible ELISA protocol to quantify autoantibodies in the serum of EAE immunized mice.

Serum Collection via Intracardiac Puncture in Experimental Autoimmune Encephalomyelitis (EAE) Immunized Mice

Seruminnsamling via intrakardial punktering i eksperimentell autoimmun encefalomyelitt (EAE) immuniserte mus

Quantification of Autoantibodies in the Serum of Experimental Autoimmune Encephalomyelitis Immunized Mice Using ELISA

Begin by re-suspending the lyophilized MOG 35 55 peptide in water. Dilute the peptide stock to 10 micrograms per milliliter in coating buffer before the experiment. Now pipette 100 microliters of the final solution into wells of a 96 well plate.Simultaneously coat an equal number of wells with 100 microliters of BSA dissolved in coating buffer. Seal the plate with an adhesive film to prevent evaporation and incubate the plate overnight at four degrees Celsius. The next day, perform three washes of the plate with 200 microliters of PBS supplemented with 0.5%tween 20.Subsequently add 100 microliters per well of a blocking solution composed of 3%BSA in PBS. Incubate the sealed plate for one hour at 37 degrees Celsius in a hybridization oven. After incubation, wash the plate three times with 200 microliters per well of PBST.Dilute each serum sample obtained from the blood of EAE immunized mice in blocking solution and add 100 microliters per well to both MOG 35 55 and BSA coated wells. Add the same volume of blocking solution to designated blank wells. Incubate the sealed plate for two hours at room temperature with constant shaking.After incubation, remove the plate from the incubator and rinse the plate three times with 200 microliters per well of PBST. Dilute the HRP conjugated secondary antibody in a solution consisting of 0.2%BSA in PBST and add 100 microliters to each well. Incubate the sealed plate for one hour at room temperature maintaining constant shaking.Wash the plate three times with 200 microliters per well of PBST. Add 100 microliters of three, three prime, five, five prime tetramethyl benzidine substrate to each well. Incubate in the dark for one to five minutes monitoring the development of a blue color.Add 100 microliters of stop solution to each well. Then use a plate reader set at a wavelength of 450 nanometers to measure the optical density in each well. The optical density values of the EAE samples were significantly higher than the control samples indicating a robust immunoglobulin G response against the MOG peptide.