Bu çalışma NIH hibe R00 CA160574 (SFB) tarafından ve (SMM için) Rutgers Biyoteknoloji Eğitim Programı bursu ile desteklenmektedir.

Bu prosedür Rutgers Kurumsal Hayvan Bakım ve Kullanım Kurulu, New Jersey Eyalet Üniversitesi tarafından onaylanmıştır. Fareler Laboratuvar Hayvanları Bakımı ve Kullanımı için NIH Kılavuzu&#39;na uygun olarak tedavi edildi. Bilim adamları kurulan ve onaylanmış kılavuzlar için ulusal ve kurumsal hayvan kuruluşlara danışılması gerekir. Başlamadan önce, Tablo 1&#39;de listelenen çözümleri hazırlamak. 1. B Hücre İzolasyon ve Aktivasyon Sonra servikal dislokasyon yapılmıştır CO2 kullanılarak bir fare öldürülür. Vücudun sol tarafı yukarı yani fare yerleştirin ve kürk nemli olana kadar% 70 etanol ile fareyi sprey. 2 ml yıkama tamponu ile bir 35 mm doku kültürü çanağı içinde dalak ve yer ayır. Bir laminar akış başlığı içinde, yavaşça 5 ml şırıngaya yassı ucu kullanılarak doku kültürü çanağı içinde dalak kırmak. <ol><li> 50 içine 70 mikron naylon örgü takınmi boru ve naylon örgü içine 2 ml yıkama tamponu içinde dalak örnek aktarmak. Yavaşça şırınga ucunu kullanarak düz örgü, dalak bozabilir. </li><li> Yıkama tamponu, 8 ml şırınga arka ve 35 mm plaka yıkayın ve 70 um naylon ağ filtre ediniz. 4 ° C&#39;de 10 dakika boyunca 300 x g&#39;de santrifüjleyin. </li><li> Aspire süpernatant atmak ve ACK lizis tamponu 3 ml pelletini ve. Yığınları parçalamak ve 5 dakika boyunca inkübasyona aşağı kısa süreli olarak pipetle ve. 4 ° C&#39;de 10 dakika boyunca 300 x g&#39;de santrifüj yıkama tamponu ve 10 ml ilave edilir. </li><li> Aspire süpernatan atılır ve yıkama tamponu ile 1 ml içinde pipetleme ile daha sonra, tüpün alt kısmını dokunarak pelletini ve. Anti-CD43 MACS mikro boncuklar 50 ul ilave edilir ve 30 dakika boyunca buz üzerinde inkübe edilir. 4 ° C&#39;de 10 dakika boyunca 300 x g&#39;de, yıkama tamponu ile 10 ml ekleyin, yavaşça karıştırın ve santrifüj. 4 ° C&#39;de 10 dakika boyunca 300 x g&#39;de, yıkama tamponu ile 10 ml ekleyin, yavaşça karıştırın ve santrifüj. </li><li> Kurulmuş birMACS mıknatıs üzerinde bir sütun koyarak Mini-MACS sütun. Kolonunun altında bir etiketli 15 ml konik tüp yerleştirin. Sütun yıkama tamponu 1 ml ilave edilir ve 15 ml&#39;lik bir tüpe çalışmasına olanak sağlar. </li><li> Yıkama tamponu 1 ml süpernatan aspire ve tekrar süspansiyon. Yıkama tamponu ile çalıştırmak sonra sütununda örnek yükleyin. </li><li> Örnek, kolon içinden geçen sonra sütunu yıkamak için 1 ml yıkama tamponu ilave edin. Doğrudan 15 ml tüp içinde toplanan numuneye yıkama tamponu 7 ml ilave edilir. </li><li> Hemasitometre kullanarak hücreleri saymak. 50 ml&#39;lik bir tüp içine / oyuk 5.000.000 hücreleri için gereken hücre gerekli hacmi aktarın. 4 ° C&#39;de 10 dakika boyunca 300 x g&#39;de santrifüjleyin. LPS 1 ile Ek B hücreli orta: 500 ve 1 IL4: 1.000. </li><li> Süpernatan aspire ve 1,000,000 hücre / ml &#39;lik nihai konsantrasyon için gerekli olan takviye B hücre ortamının uygun hacimde ekleyin. </li><li> Bir nemlendirme 1.000.000 hücre / ml, bir yerde hücreler, 5 ml 6 yuvalı plakalar içinde plakası hücreleri37 ° C&#39;de bir hücre kültürü yetiştirme baskı,% 5 CO2. </li></ol> 2. B Hücre Sabitleme <ol><li> De (100 ng / ml &#39;lik bir nihai konsantrasyon için) B hücre 5 ml ihtiva eden ve 37 °&#39; de 1 saat inkübe C colcemid 50 ul ekle. Bir 37 ° C su banyosu içinde ön ısıtılması, 75 mM KCI çözeltisi. Etiketlenmiş bir 15 ml tüp B hücreleri aktarın. 4 ° C&#39;de 10 dakika boyunca 300 x g&#39;de santrifüj ile bant ve etiket kapak. </li><li> Tüp içinde 1 ml bırakarak süpernatant aspire ve pipetleme pelletini. Dokunarak veya bir girdap darbe sırasında damla prewarmed KCl damla 5 ml ekleyin. </li><li> KCl 10 ml ekleyin ve tersini karıştırın. 15 dakika süre ile, 37 ° C su banyosu içinde inkübe edin. Tersini taze fiksatif ve karışımın 5 damla ekleyin. 4 ° C&#39;de 10 dakika boyunca 300 x g&#39;de santrifüjleyin. Yukarı ve aşağı pipetleme tüp ve tekrar süspansiyon pelet 1 ml bırakarak süpernatant aspire. </li><li> Dokunarak veya vor üzerinde darbeli ise damla taze fiksatif damla 5 ml ekleyintex. Fiksatif ilave bir 10 ml ilave edilir ve oda sıcaklığında 30 dakika inkübe edilir. </li><li> 4 ° C&#39;de 10 dakika boyunca 300 x g&#39;de santrifüjleyin. Pipetle tarafından tüp ve tekrar süspansiyon 1 ml bırakarak süpernatant aspire. 4 ° C&#39;de 10 dakika boyunca 300 x g&#39;de santrifüj taze sabitleştirici ve 14 ml ilave edilir. </li><li> Adımı tekrarlayın 2.7 kez daha fazla. </li><li> Taze fiksatif 14 ml ekleyin. Parafilm ile sızdırmaz şekilde kapatılır ve kapaklar -20 ° C de bir gece boyunca muhafaza ediniz. </li></ol> Metafaz Kromozom Spread 3. hazırlanması <ol><li> 22.9 ° C ve% 52 nem için düzenlenmiş çevresel odasını ayarlayın. </li><li> Santrifüj, 4 ° C&#39;de 10 dakika boyunca 300 xg&#39;de B hücrelerinin sabit. Aspire pipetleme tüp ve tekrar süspansiyon 70 ul bırakarak sabitleştirici. </li><li> 35 ° açıyla nem odasında etiketli slaytlar yerleştirin. Bir slayt üzerine yeniden süspanse B hücrelerinin 35 ul damla ve numune başına iki slaytlar bırakın. 30 dakika sonra slaytları saklamak için slaytlar nem odasında kurumaya bırakın37 ° C&#39;de bir slayt kutusu. </li></ol> 4. Telomer PNA BALIK <ol><li> Probe hazırlanması <ol><li> 37 ° C önceden sıcak deiyonize formamiddir. 7 ul önceden ısıtılmış deiyonize formamid ile telomer PNA probu 2 ul karıştırın ve 1 saat boyunca çalkalanarak 37 ° C&#39;de inkübe edin. </li><li> 37 ° C önceden sıcak BALIK usta karışımı. Aşama 4.1.1 karışımına 7 ul önceden ısıtılmış BALIK ana karışımı ilave edin ve 1-3 saat boyunca 37 ° C&#39;de inkübe edin. </li><li> 80 ° C&#39;de 8 dakika boyunca prob karışımı denatüre. 37 ° C&#39;de 1 saat boyunca prob önceden tavlanması. </li></ol></li><li> Kromozom Slaytlar Tedavi öncesi <ol><li> Bir su banyosu içinde 37 ° C&#39;de 0.01 M HCI 50 ml ihtiva eden bir cam slayt, boyama kavanoz önceden ısıtın. </li><li> Oda sıcaklığında 5 dakika boyunca 2 x SSC içeren farklı bir cam slayt boyama kavanoz Slaytları. </li><li> Önceden ısıtılmış bir cam slayt-boyama kavanoz Pepsin stoklar 2 ul ve alt üst edilerek karıştırılır. Bu cam sl Transfer slaytlaride boyama kavanozu ve 37 ° C&#39;de 90 saniye kuluçkaya. </li><li> Slaytlar sallayarak, oda sıcaklığında 5 dakika her biri için 1x PBS içeren farklı bir cam slayt boyama kavanoz 2x yıkayın. Daha sonra çalkalama, oda sıcaklığında 1 x PBS / MgCI2, 5 dakika için slaytlar yıkayın. </li><li> Oda sıcaklığında 10 dakika için taze hazırlanmış% 1 formaldehid / 1x PBS / MgCI2 ihtiva eden bir cam slayt, boyama kavanoza slaytlar aktarın. </li><li> Çalkalanarak oda sıcaklığında 1 x PBS içeren farklı bir cam slayt, boyama kavanoz içinde 5 dakika boyunca slaytlar yıkayın. </li><li> % 70,% 90 ve% 100 etanol ihtiva eden ayrı ayrı cam slayt, boyama kavanoz sahip olan bir etanol su kaybı geliştirilmesidir. </li><li> Daha sonra% 70 etanol,% 90 etanol, ardından% 100 etanol ile başlanarak, 3 dakika boyunca her kavanoza slaytlar aktarın. Bittiğinde -20 ° C&#39;de etanol kavanozları yerleştirin. </li><li> Bir kağıt havlu üzerine aşırı etanol dokunarak ve 35 ° açıyla slaytlar yaslanır tarafından hava kurumaya slaytlar izin ver. Kuruduktan sonra, maBir elmas kalem kullanarak slaytlar arkasında melezleşme için bir 18 x 18 mm alanı çalış. </li></ol></li><li> FISH için Slaytlar denatürasyonu <ol><li> 24 x 60 mm lamel 120 ul% 70 deiyonize formamid / 2X SSC uygulayın. Lamel slayt dokunun. 90 saniye için bir sıcak plaka üzerinde 80 ° C de slayt denatüre. </li><li> Hızlı ve dikkatli bir şekilde lamel kaydırarak ve 3 dakika boyunca% 90 etanol, ardından 3 dakika,% 100 etanol ve her biri için buz soğuğu% 70 etanol içinde slayt yerleştirin. Kuru hava slaytlar izin ver. </li><li> Sıkı bir kapak ve ıslak kağıt mendil ile bir plastik kutu astar ile nemli odasını hazırlayın. Kağıt nemli olabilir, ancak su ile doymuş olmamalıdır. </li><li> Nemli bir oda içinde, sürgü üzerine işaretli bölgeye adım 4.1.3 de önceden tavlanmış prob karışımı geçerli bir 18 x 18 mm kapak slipi ile kapatın ve 1 saat boyunca 37 ° C&#39;de inkübe edin. </li></ol></li><li> Post-inkübasyon Yıkama <ol><li> Ön sıcak% 50 formamid / 2 x SSC, 1 x SSC ve 4x SSC /% 0.1 Tween-20, 45 ° &#39;deC su banyosu. </li><li> Dikkatlice lamelleri çıkarın ve karanlık ve çalkalanarak önceden ısıtılmış% 50 formamid / 2 x SSC 3xfor 5 dakika ve her bir durumda slaytlar yıkayın. Çalkalama, 3xfor 5 dakika önceden ısıtılmış 1x SSC, her slaytlar yıkayın. Son olarak, önceden ısıtılmış 4x SSC slaytlar yıkama /% 0.1 Tween-20 3xfor her biri 5 dakika. </li><li> Hafif bir korumalı cam slayt,-boyama kavanoz DAPI 3 dakika boyunca slaytlar Leke. </li><li> Çalkalama, 2x SSC içinde 5 dakika boyunca slaytlar yıkayın. 60 x 24 mm kapak camı ile kapak, montaj orta Mowiol 35 ul uygulayın ve 4 ° C&#39;de slaytlar saklayın. </li></ol></li></ol> Kromozomların 5. Mikroskobik Analizi <ol><li> Standart bir epi-floresan mikroskop kullanılarak metafaz slaytlar analiz edin. En iyi sonuçları elde etmek için bu tür MetaSystems Metafer platform olarak otomatik bir sahne ile bir görüntüleme platformu kullanın. DAPI floresan kromozom görselleştirmek için her metafaz yayılması için, bir resim toplamak ve telomer p gelen floresan sinyali için bir resimbornoz. (Örneğin, Cy3- diğer Fluors mevcuttur ve iyi derecede çalışır.) </li><li> Bir görüntü analiz programı ile görüntüleri Yerleşimi ve analiz eder. </li></ol>

<ol>
	<li>Sancar, A., Lindsey-Boltz, L. A., Unsal-Kacmaz, K., Linn, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Molecular+mechanisms+of+mammalian+DNA+repair+and+the+DNA+damage+checkpoints.">Molecular mechanisms of mammalian DNA repair and the DNA damage checkpoints.</a> Ann Rev Biochem. 73, 39-85 (2004).</li><li>Sperka, T., Wang, J., Rudolph, K. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=DNA+damage+checkpoints+in+stem+cells,+ageing+and+cancer.">DNA damage checkpoints in stem cells, ageing and cancer.</a> Nature reviews Mol Cell Biol. 13 (9), 579-590 (2012).</li><li>Alexandrov, L. B., 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=Signatures+of+mutational+processes+in+human+cancer.">Signatures of mutational processes in human cancer.</a> Nature. 500 (7463), 415-421 (2013).</li><li>Bunting, S. 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=53BP1+inhibits+homologous+recombination+in+Brca1-deficient+cells+by+blocking+resection+of+DNA+breaks.">53BP1 inhibits homologous recombination in Brca1-deficient cells by blocking resection of DNA breaks.</a> Cell. 141 (2), 243-254 (2010).</li><li>Padilla-Nash, H. M., Barenboim-Stapleton, L., Difilippantonio, M. J., Ried, T. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Spectral+karyotyping+analysis+of+human+and+mouse+chromosomes.">Spectral karyotyping analysis of human and mouse chromosomes.</a> Nat Protoc. 1 (6), 3129-3142 (2006).</li><li>Callen, 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=Chimeric+IgH-TCRalpha/delta+translocations+in+T+lymphocytes+mediated+by+RAG.">Chimeric IgH-TCRalpha/delta translocations in T lymphocytes mediated by RAG.</a> Cell Cycle. 8 (15), 2408-2412 (2009).</li><li>Boboila, 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=Alternative+end-joining+catalyzes+robust+IgH+locus+deletions+and+translocations+in+the+combined+absence+of+ligase+4+and+Ku70.">Alternative end-joining catalyzes robust IgH locus deletions and translocations in the combined absence of ligase 4 and Ku70.</a> Natl Acad Sci USA. 107 (7), 3034-3039 (2010).</li><li>Benn, P., Delach, J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Human+lymphocyte+culture+and+chromosome+analysis.">Human lymphocyte culture and chromosome analysis.</a> Cold Spring Harb Protoc. 2008, (2008).</li><li>Nguyen, H. N., Reijo Pera, R. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Metaphase+spreads+and+spectral+karyotyping+of+human+embryonic+stem+cells.">Metaphase spreads and spectral karyotyping of human embryonic stem cells.</a> Cold Spring Harb Protoc. 2008, (2008).</li><li>Schreck, R. R., Disteche, C. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Chapter+4.">Chapter 4.</a> Chromosome banding techniques. Unit 2, (2001).</li><li>Gilley, D., 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=DNA-PKcs+is+critical+for+telomere+capping.">DNA-PKcs is critical for telomere capping.</a> Proc Natl Acad Sci USA. 98 (26), 15084-15088 (2001).</li><li>Bolzan, A. D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Chromosomal+aberrations+involving+telomeres+and+interstitial+telomeric+sequences.">Chromosomal aberrations involving telomeres and interstitial telomeric sequences.</a> Mutagenesis. 27 (1), 1-15 (2012).</li><li>Bolzan, A. D., Telomeres Bianchi, M. S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=interstitial+telomeric+repeat+sequences+and+chromosomal+aberrations.">interstitial telomeric repeat sequences and chromosomal aberrations.</a> Mutat Res. 612 (3), 189-214 (2006).</li><li>Poon, S. S., Lansdorp, P. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Chapter+18.">Chapter 18.</a> Quantitative fluorescence in situ hybridization (Q-FISH). Unit 18 14, (2001).</li><li>Morales, J. 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=53BP1+and+p53+synergize+to+suppress+genomic+instability+and+lymphomagenesis.">53BP1 and p53 synergize to suppress genomic instability and lymphomagenesis.</a> Proc Natl Acad Sci USA. 103 (9), 3310-3315 (2006).</li><li>Halaby, M. J., 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=Synergistic+interaction+of+Rnf8+and+p53+in+the+protection+against+genomic+instability+and+tumorigenesis.">Synergistic interaction of Rnf8 and p53 in the protection against genomic instability and tumorigenesis.</a> PLoS Genet. 9 (1), e1003259 (2013).</li></ol>

Yazarlar çatışan çıkarları var.

Aktifleşmiş B lenfositleri, özellikle mitotik kromozom sürülen hazırlamaya uygun olan ise, diğer hücre tipleri de kullanılabilir. T lenfositleri de dalak veya lemf nodlarından saflaştırılabilir gibi, B hücrelerinin avantajları çok paylaşan ve uygun mitojenler 8 ihtiva eden ortam içinde büyüme ile uyarıldıkları zaman, yüksek bir mitotik indeksli sahiptir. Embriyonik Kök hücreler (ES hücreleri) de metafaz kromozom analizi 9 için uygundur. Bu mevcut değilse, colcemid ile d...

A correction was made to: Rapid Analysis of Chromosome Aberrations in Mouse B Lymphocytes by PNA-FISH.&#160;Table 1 (the list of solutions to prepare) was omitted from the Protocol section. The contents of Table 1 are as follows:
<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>Solution</td>
			<td>Reagents</td>
			<td>Comments</td>
			<td>Storage</td>
		</tr>
		<tr>
			<td rowspan="3">B Cell Wash Buffer</td>
			<td>500 ml 1x Hanks Balanced Salt Solution</td>
			<td rowspan="3">Filter through 0.22 &#956;m stericup filtration unit</td>
			<td rowspan="3">4 &#176;C</td>
		</tr>
		<tr>
			<td>5 ml 50 &#176;C heat inactivated FCS</td>
		</tr>
		<tr>
			<td>5 ml 100x Pen/Strep</td>
		</tr>
		<tr>
			<td rowspan="8">B Cell Medium</td>
			<td>418.5 ml RPMI-1640</td>
			<td rowspan="8">Filter through 0.22 &#956;m stericup filtration unit</td>
			<td rowspan="8">4 &#176;C</td>
		</tr>
		<tr>
			<td>50 ml 50 &#176;C heat inactivated FCS</td>
		</tr>
		<tr>
			<td>5 ml 100x Pen/Strep</td>
		</tr>
		<tr>
			<td>5 ml glutamine</td>
		</tr>
		<tr>
			<td>5 ml nonessential amino acids</td>
		</tr>
		<tr>
			<td>5 ml sodium pyruvate</td>
		</tr>
		<tr>
			<td>1.8 ml 14.2 M 2-mercaptoethanol</td>
		</tr>
		<tr>
			<td>5 ml 1M HEPES</td>
		</tr>
		<tr>
			<td>Fixative</td>
			<td>3:1 v/v methanol/glacial acetic acid</td>
			<td></td>
			<td>Make fresh</td>
		</tr>
		<tr>
			<td rowspan="2">0.075 M KCl</td>
			<td>1.395 g KCl</td>
			<td rowspan="2"></td>
			<td rowspan="2">Room Temperature</td>
		</tr>
		<tr>
			<td>250 ml distilled H2O</td>
		</tr>
		<tr>
			<td rowspan="3">FISH Master Mix</td>
			<td>40 ml 50% Dextran sulfate</td>
			<td rowspan="3">Vortex the solution and leave in a shaking platform overnight</td>
			<td rowspan="3">Aliquot and store at -20 &#176;C</td>
		</tr>
		<tr>
			<td>20 ml 20x SSC</td>
		</tr>
		<tr>
			<td>40 ml sterile distilled H2O</td>
		</tr>
		<tr>
			<td rowspan="3">70% Formamide/2x SSC</td>
			<td>10 ml 20x SSC</td>
			<td rowspan="3">Adjust to pH 7 with 1M HCl</td>
			<td rowspan="3">Aliquot and store at -20 &#176;C</td>
		</tr>
		<tr>
			<td>20 ml distilled H2O</td>
		</tr>
		<tr>
			<td>70 ml deionized formamide</td>
		</tr>
		<tr>
			<td rowspan="2">0.01 M HCl</td>
			<td>1 ml 1M HCl</td>
			<td rowspan="2">Adjust to pH 2.0</td>
			<td rowspan="2">Room Temperature</td>
		</tr>
		<tr>
			<td>99 ml distilled H2O</td>
		</tr>
		<tr>
			<td rowspan="2">1x PBS/MgCl2</td>
			<td>50 ml 1M MgCl2</td>
			<td rowspan="2"></td>
			<td rowspan="2">Room Temperature</td>
		</tr>
		<tr>
			<td>950 ml 1x PBS</td>
		</tr>
		<tr>
			<td rowspan="3">50% Formamide/2x SSC</td>
			<td>20 ml 20x SSC</td>
			<td rowspan="3">Adjust to pH 7.25 
			Formamide used in this step does not have to be deionized.</td>
			<td rowspan="3">Make fresh</td>
		</tr>
		<tr>
			<td>80 ml distilled H2O</td>
		</tr>
		<tr>
			<td>100 ml formamide</td>
		</tr>
		<tr>
			<td rowspan="3">4x SSC/0.1% Tween20</td>
			<td>50 ml 20x SSC</td>
			<td rowspan="3"></td>
			<td rowspan="3">Room Temperature</td>
		</tr>
		<tr>
			<td>200 ml distilled H2O</td>
		</tr>
		<tr>
			<td>250 &#956;l Tween20</td>
		</tr>
		<tr>
			<td rowspan="2">DAPI staining solution (80 ng/ml)</td>
			<td>40 &#956;l 0.2mg/ml DAPI stock</td>
			<td rowspan="2"></td>
			<td rowspan="2">4 &#176;C in light protected staining jar</td>
		</tr>
		<tr>
			<td>100 ml 2x SSC</td>
		</tr>
		<tr>
			<td rowspan="5">Mowiol Mounting Medium</td>
			<td>6 g glycerol</td>
			<td rowspan="5">Incubate at 50 &#176;C with stirring for 2hrs</td>
			<td rowspan="5">Aliquot and store at 4 &#176;C</td>
		</tr>
		<tr>
			<td>2.4 g Mowiol 4-88</td>
		</tr>
		<tr>
			<td>6 ml distilled H2O</td>
		</tr>
		<tr>
			<td>12 ml 0.2 M TrisCl pH 8.5</td>
		</tr>
		<tr>
			<td>230 &#956;l 1% Thimerosal (w/v in water)</td>
		</tr>
	</tbody>
</table>
Table 1. List of solutions.&#160;

A correction was made to: Rapid Analysis of Chromosome Aberrations in Mouse B Lymphocytes by PNA-FISH.

Erratum: Rapid Analysis of Chromosome Aberrations in Mouse B Lymphocytes by PNA-FISH

Kanser, normal hücre gelişimini düzenleyen genlerin etkileyen mutasyonların birikmesine neden olur. Mutasyon DNA&#39;ya hasar görmesinden kaynaklanır genomunun yapısı ve sekansına değişikliklerin bir sonucudur. DNA hasarı örneğin iyonize edici radyasyon gibi, ekzojen maddeler de dahil olmak üzere, çeşitli işlem vasıtasıyla ortaya çıkabilir ve reaktif oksijen türleri 1 ile temas ile oluşan nükleotid baz veya hasar spontan deaminasyonu gibi normal hücresel metabolizma, bir yan ürün olarak. Memeli hücrelerinin, DNA hasarı tersine veya mola yerlerinde sırası geri yükleyebilirsiniz onarım faaliyetleri bir dizi sahip olmasına rağmen, mutasyonların yine bir hücrenin ömrü boyunca birikir. DNA hasarı, ayrıca, yaşlanma ile ilişkili hastalık 2 ile ilişkili iki işlem, yaşlılık ve kök hücre potens kaybı katkıda bulunabilir. İki işaret adresleme nedenle merkezi öneme DNA hasarının onarımı Anlamakamu sağlığı ificant konular. Artan kanıtlar memeli DNA onarım yolları daha da zorunlu moleküler düzeyde mutasyon bastırmakla alakası süreçleri anlamak için yapım, kanser hücre genomu 3,4 evrimine katkıda düşündürmektedir. Kromozom anormallikleri doğrudan görselleştirme özel bir hücre türü genomik instabilite ölçüde belirleyen güçlü ve kantitatif bir araçtır. Metafaz hücrelerinden özet kromozomları izole ve ışık veya floresan mikroskopi kullanılarak kontrol edilebilir. Bu tür yaklaşımlar, sitogenetik birkaç on yıl boyunca uygulamada olmuştur ve translokasyonları veya DNA tamir aktiviteleri kaybı ile ilgili kromozom anormallikleri belirli türleri görünümünü göstermek için kullanılabilir. Protokol birkaç potansiyel uzantıları kendisini ödünç: kromozomlar in situ hibridizasyon spektral karyotip (SKY) veya çok renkli floresan için sondalar ile etiketli olabilir(MFISH) translakosyon 5,6 tanımlamak için. Bu teknikler aynı zamanda bu protokol ile mümkündür ötesinde ek bilgi sağlar kromozom translokasyonların sıklığını ve tespit edilecek kompleks kromozom translokasyonların yapısını, etkinleştirin. Seçenek olarak ise, diziye özgü problar olarak üretilir ve seçilen genomik DNA&#39;sı sitelerinin 7 kopma frekansı test etmek için de kullanılabilir. Bu protokol, biz metafaz kromozom hazırlanması B lenfositlerden yayılır açıklar. Telomerik tekrarlar için bir fluoresan olarak işaretlenmiş peptid nükleik asit (PNA) sistemi etkin metafaz kromozomda telomerlerin işaretleyen kullanılır Bu protokol, bir çok avantaja sahiptir yayılır. B hücreleri, yüksek kaliteli sürülen sürekli olarak üretilebilir ve böylece yüksek bir mitotik indeksli, büyümesi için teşvik edilebilir. Genetiği değiştirilmiş farelerde B hücreleri de çok daha az katkı analizini bulandırabilir sekonder genetik mutasyonlar içeren muhtemeldirgenomik bütünlük belirli genler. PNA-BALIK yaklaşım bir günde tamamlanmış ve kromozom kırılmaları daha doğru puanlama veriyor olabilir. Özellikle bu protokolde tarif edilen özel ekipmanla birlikte, bu yaklaşım kullanılarak, çok tutarlı, yüksek kaliteli sürülen ürünlerin üretilmesi ve hızlı oranı ve genomik instabilite tür analiz etmek mümkündür.

<table border="0" cellpadding="0" cellspacing="0" width="679">
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:268px;">Name</td>
			<td style="width:116px;">Company&#160;</td>
			<td style="width:119px;">Catalog Number</td>
			<td style="width:176px;">&#160;Comments</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">50% Dextran sulfate</td>
			<td>Intergen</td>
			<td>S4030</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Deionized formamide&#160;</td>
			<td>Ambion</td>
			<td>9342</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Pepsin (5g)</td>
			<td>Sigma</td>
			<td>P 6887&#160;</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">FCS</td>
			<td>Gemini</td>
			<td>100-106</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">LPS (100mg)</td>
			<td>Sigma</td>
			<td>L2630</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">IL-4 (5&#956;g)</td>
			<td>Sigma</td>
			<td>I1020</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">PNA Telomere Probe</td>
			<td>PNA Bio Inc</td>
			<td>F1002</td>
			<td>(CCCTAACCCTAACCCTAA)</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Colcemid</td>
			<td>Roche</td>
			<td>295892</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Mowiol 4-88</td>
			<td>Sigma</td>
			<td>81381-50g</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">CD43 (ly-48_) micro-beads</td>
			<td>Miltenyl Biotec.&#160;</td>
			<td>130-049-801</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">DAPI</td>
			<td>Sigma</td>
			<td>32670-5MG</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Eclipse E800</td>
			<td>Nikon</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">AxioImager.Z2</td>
			<td>Zeiss</td>
			<td></td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">CDS-5 Cytogenetic Drying Chamber</td>
			<td>Thermotron</td>
			<td></td>
			<td></td>
		</tr>
	</tbody>
</table>

rapid analysis of chromosome aberrations in mouse b lymphocytes by pna-fish

Arızalı DNA onarım tümörigeneze yol mutasyonların kök nedenidir genomik istikrarsızlık, artan yol açar. Farklı hücre tiplerinde frekans ve kromozom anormallikleri türü analizi DNA onarım geçiş yollarında bazı kusurların araştırılmasına izin verir. Anlama memeli DNA tamir biyoloji büyük ölçüde spesifik gen knock-out ile farelerin üretimi ile yardımcı olmuştur. Bu protokolün amacı, fare B lenfositleri genomik istikrarsızlık ölçümüdür. PNA-BALIK sondaları (peptid nükleik asit - in situ hibridizasyon floresan) ile telomerlerin Etiketleme metafaz kromozom yayılır genomik istikrarsızlık hızlı analiz kolaylaştırır. Normal ploidi ve daha yüksek bir mitotik indeks çünkü B hücreleri, fibroblastlar göre spesifik avantajları vardır. B hücrelerinin kısa dönemli kültür bu nedenle daha az ikincil genetik mutasyona uğramış ihtimali olan bir birincil hücre popülasyonunda genomik instabilite hassas ölçüm sağlartipik olarak transforme edilmiş fibroblastlar veya hastanın hücre soylarında bulundu olandan s.

Bir hücreden türetilen metafaz kromozomlarda (Şekil 1A) (Fare hücreleri kullanılarak gerçekleştirilen varsa) 40 kromozom içeren ayrı bir küme oluşturmak gerekir. Her kromozom bir açık mavi küre gibi görünür bir ucunda, bir sentromer vardır. Normal kromozom olarak iki telomer sinyaller her bir sentromer ile kromatidlerin ve iki sinyalin sonunda görülür. Interfaz çekirdekleri de slaytta mevcut olacaktır. Bu kırmızı telomer sinyalleri ile mavi küreler, ama hiçbir yoğunlaşmış...

Watch this Scientific Journal Video about Rapid Analysis of Chromosome Aberrations in Mouse B Lymphocytes by PNA-FISH at JoVE.com

Rapid Analysis of Chromosome Aberrations in Mouse B Lymphocytes by PNA-FISH

DNA onarım yolları genomik bütünlüğünü korumak ve mutasyon ve kanser önlenmesi için gereklidir. Bu protokolün amacı, metafaz telomerik DNA tekrarlar in situ hibridizasyon (FISH) floresan kullanılarak fare B hücreleri yayılır içinde kromozom anormallikleri doğrudan gözlem ile genomik istikrarsızlık ölçümüdür.

PNA-FISH ile Fare B Lenfositlerindeki kromozom anormallikleri hızlı Analizi

Defective DNA repair leads to increased genomic instability, which is the root cause of mutations that lead to tumorigenesis. Analysis of the frequency ...

rapid-analysis-chromosome-aberrations-mouse-b-lymphocytes-pna

Research

JoVE Journal

Immunology and Infection

16.8K Görüntüleme.  Rutgers, the State University of New Jersey.  DNA onarım yolları genomik bütünlüğünü korumak ve mutasyon ve kanser önlenmesi için gereklidir. Bu protokolün amacı, metafaz telomerik DNA tekrarlar in situ hibridizasyon (FISH) floresan kullanılarak fare B hücreleri yayılır içinde kromozom anormallikleri doğrudan gözlem ile genomik istikrarsızlık ölçümüdür. 

Video: Rapid Analysis of Chromosome Aberrations in Mouse B Lymphocytes by PNA-FISH

Combination of Adhesive-tape-based Sampling and Fluorescence in situ Hybridization for Rapid Detection of Salmonella on Fresh Produce

This protocol describes a simple approach for adhesive-tape-based sampling of tomato and other fresh produce surfaces, followed by on-tape fluorescence in situ hybridization (FISH) for rapid culture-independent detection of Salmonella spp. Cell-charged tapes can also be placed face-down on selective agar for solid-phase enrichment prior to detection. Alternatively, low-volume liquid enrichments (liquid surface miniculture) can be performed on the surface of the tape in non-selective broth, followed by FISH and analysis via flow cytometry. To begin, sterile adhesive tape is brought into contact with fresh produce, gentle pressure is applied, and the tape is removed, physically extracting microbes present on these surfaces. Tapes are mounted sticky-side up onto glass microscope slides and the sampled cells are fixed with 10% formalin (30 min) and dehydrated using a graded ethanol series (50, 80, and 95%; 3 min each concentration). Next, cell-charged tapes are spotted with buffer containing a Salmonella-targeted DNA probe cocktail and hybridized for 15 - 30 min at 55&deg;C, followed by a brief rinse in a washing buffer to remove unbound probe. Adherent, FISH-labeled cells are then counterstained with the DNA dye 4',6-diamidino-2-phenylindole (DAPI) and results are viewed using fluorescence microscopy. For solid-phase enrichment, cell-charged tapes are placed face-down on a suitable selective agar surface and incubated to allow in situ growth of Salmonella microcolonies, followed by FISH and microscopy as described above. For liquid surface miniculture, cell-charged tapes are placed sticky side up and a silicone perfusion chamber is applied so that the tape and microscope slide form the bottom of a water-tight chamber into which a small volume (&le; 500 &mu;L) of Trypticase Soy Broth (TSB) is introduced. The inlet ports are sealed and the chambers are incubated at 35 - 37&deg;C, allowing growth-based amplification of tape-extracted microbes. Following incubation, inlet ports are unsealed, cells are detached and mixed with vigorous back and forth pipetting, harvested via centrifugation and fixed in 10% neutral buffered formalin. Finally, samples are hybridized and examined via flow cytometry to reveal the presence of Salmonella spp. As described here, our "tape-FISH" approach can provide simple and rapid sampling and detection of Salmonella on tomato surfaces. We have also used this approach for sampling other types of fresh produce, including spinach and jalape&ntilde;o peppers.

Combination of Adhesive-tape-based Sampling and Fluorescence in situ Hybridization for Rapid Detection of Salmonella on Fresh Produce

This protocol describes a simple adhesive-tape-based approach for sampling of tomato and other fresh produce surfaces, followed by rapid whole cell detection of Salmonella using fluorescence in situ hybridization (FISH).

Yapışkan bant tabanlı Örnekleme ve Floresans kombinasyonu In situ</emHızlı Algılama> Hibridizasyon Salmonella Taze üretin

This protocol describes a simple approach for adhesive-tape-based sampling of tomato and other fresh produce surfaces, followed by on-tape fluorescence in ...

İmmünoloji ve Enfeksiyon

Methods to Assess Beta Cell Death Mediated by Cytotoxic T Lymphocytes

Type 1 diabetes (T1D) is a T cell mediated autoimmune disease. During the pathogenesis, patients become progressively more insulinopenic as 
insulin production is lost, presumably this results from the destruction of pancreatic beta cells by T cells. Understanding the mechanisms of beta cell death during 
the development of T1D will provide insights to generate an effective cure for this disease. Cell-mediated lymphocytotoxicity (CML) assays have historically used the 
radionuclide Chromium 51 (51Cr) to label target cells. These targets are then exposed to effector cells and the release of 51Cr from target 
cells is read as an indication of lymphocyte-mediated cell death. Inhibitors of cell death result in decreased release of 51Cr.
 As effector cells, we used an activated autoreactive clonal population of CD8+ Cytotoxic T lymphocytes (CTL) isolated from a mouse stock transgenic for both the alpha and beta chains of the AI4 T cell receptor (TCR). Activated AI4 T cells were co-cultured with 51Cr labeled target NIT cells for 16 hours, release of 51Cr was recorded to calculate specific lysis 
Mitochondria participate in many important physiological events, such as energy production, regulation of signaling transduction, and apoptosis. The study of beta cell mitochondrial functional changes during the development of T1D is a novel area of research. Using the mitochondrial membrane potential dye Tetramethyl Rhodamine Methyl Ester (TMRM) and confocal microscopic live cell imaging, we monitored mitochondrial membrane potential over time in the beta cell line NIT-1. For imaging studies, effector AI4 T cells were labeled with the fluorescent nuclear staining dye Picogreen. NIT-1 cells and T cells were co-cultured in chambered coverglass and mounted on the microscope stage equipped with a live cell chamber, controlled at 37&deg;C, with 5% CO2, and humidified. During these experiments images were taken of each cluster every 3 minutes for 400 minutes.
Over a course of 400 minutes, we observed the dissipation of mitochondrial membrane potential in NIT-1 cell clusters where AI4 T cells were attached. In the simultaneous control experiment where NIT-1 cells were co-cultured with MHC mis-matched human lymphocyte Jurkat cells, mitochondrial membrane potential remained intact. This technique can be used to observe real-time changes in mitochondrial membrane potential in cells under attack of cytotoxic lymphocytes, cytokines, or other cytotoxic reagents.

Cell-mediated lymphocytotoxicity (CML) assays can be used to test autoreactive responses and study mechanisms of cell death in vitro. However, using live-cell confocal microscopic imaging techniques with fluorescent dyes, the type and kinetics of cell death as well as the pathways utilized can be studied in greater detail.

Sitotoksik T Lenfositler Beta Hücre Ölümü aracılığı ile değerlendirin yöntemleri

Type 1 diabetes (T1D) is a T cell mediated autoimmune disease.  During the pathogenesis, patients become progressively more insulinopenic as 
insulin ...

Isolation of Lymphocytes from Mouse Genital Tract Mucosa

Mucosal surfaces, including in the gastrointestinal, urogenital, and respiratory tracts, provide portals of entry for pathogens, such as viruses and bacteria 1. Mucosae are also inductive sites in the host to generate immunity against pathogens, such as the Peyers patches in the intestinal tract and the nasal-associated lymphoreticular tissue in the respiratory tract. This unique feature brings mucosal immunity as a crucial player of the host defense system. Many studies have been focused on gastrointestinal and respiratory mucosal sites. However, there has been little investigation of reproductive mucosal sites. The genital tract mucosa is the primary infection site for sexually transmitted diseases (STD), including bacterial and viral infections. STDs are one of the most critical health challenges facing the world today. Centers for Disease Control and Prevention estimates that there are 19 million new infectious every year in the United States. STDs cost the U.S. health care system $17 billion every year 2, and cost individuals even more in immediate and life-long health consequences. In order to confront this challenge, a greater understanding of reproductive mucosal immunity is needed and isolating lymphocytes is an essential component of these studies. Here, we present a method to reproducibly isolate lymphocytes from murine female genital tracts for immunological studies that can be modified for adaption to other species. The method described below is based on one mouse.&#x2003;

An efficient way to isolate lymphocytes from mouse genital tract is described. This method takes advantage of enzyme digestion and Percoll gradient separation to allow efficient isolation. This technique is also adaptable to for use in other species

Fare Genital Sistemlerinin Mukozanin gelen Lenfosit İzolasyonu

Mucosal surfaces, including in the gastrointestinal, urogenital, and respiratory tracts, provide portals of entry for pathogens, such as viruses and ...

Rapid and Robust Analysis of Cellular and Molecular Polarization Induced by Chemokine Signaling

Cells respond to chemokine stimulation by losing their round shape in a process called polarization, and by altering the subcellular localization of many proteins. Classic imaging techniques have been used to study these phenomena. However, they required the manual acquisition of many cells followed by time consuming quantification of the morphology and the co-localization of the staining of tens of cells. Here, a rapid and powerful method is described to study these phenomena on samples consisting of several thousands of cells using an imaging flow cytometry technology that combines the advantages of a microscope with those of a cytometer. Using T lymphocytes stimulated with CCL19 and staining for MHC Class I molecules and filamentous actin, a gating strategy is presented to measure simultaneously the degree of shape alterations and the extent of co-localization of markers that are affected by CCL19 signaling. Moreover, this gating strategy allowed us to observe the segregation of filamentous actin (at the front) and phosphorylated Ezrin-Radixin-Moesin (phospho-ERM) proteins (at the rear) in polarized T cells after CXCL12 stimulation. This technique was also useful to observe the blocking effect on polarization of two different elements: inhibition of actin polymerization by a pharmacological inhibitor and expression of mutants of the Par6/atypical PKC signaling pathway. Thus, evidence is shown that this technique is useful to analyze both morphological alterations and protein redistributions.

Chemokine signaling elicits marked alterations of cellular morphology and some important redistributions of intracellular proteins. Here, a rapid and detailed protocol is provided to study these events.

Kemokin Sinyalizasyonu Bağlı Hücresel ve Moleküler Polarizasyon Hızlı ve Sağlam Analizi

Cells respond to chemokine stimulation by losing their round shape in a process called polarization, and by altering the subcellular localization of many ...

Detection of True IgE-expressing Mouse B Lineage Cells

B lymphocyte immunoglobulin heavy chain (IgH) class switch recombination (CSR) is a process wherein initially expressed IgM switches to other IgH isotypes, such as IgA, IgE and IgG. Measurement of IgH CSR in vitro is a key method for the study of a number of biologic processes ranging from DNA recombination and repair to aspects of molecular and cellular immunology. In vitro CSR assay involves the flow cytometric measurement surface Ig expression on activated B cells. While measurement of IgA and IgG subclasses is straightforward, measurement of IgE by this method is problematic due to soluble IgE binding to Fc&#949;RII/CD23 expressed on the surface of activated B cells. Here we describe a unique procedure for accurate measurement of IgE-producing mouse B cells that have undergone CSR in culture. The method is based on trypsin-mediated cleavage of IgE-CD23 complexes on cell surfaces, allowing for detection of IgE-producing B lineage cells by cytoplasmic staining. This procedure offers a convenient solution for flow cytometric analysis of CSR to IgE.

In vitro analysis of class switch recombination in mice is challenging due to cytophilic IgE molecules bound to Fc receptors on the surface of B cells. We describe a method for IgE detection using trypsin-mediated cleavage of surface-bound IgE prior to fixation and permeabilization for cytoplasmic fluorescence staining.

Doğru Algılama Fare B Lineage Hücreleri IgE-ifade

B lymphocyte immunoglobulin heavy chain (IgH) class switch recombination (CSR) is a process wherein initially expressed IgM switches to other IgH ...

A Simple and Rapid Protocol to Non-enzymatically Dissociate Fresh Human Tissues for the Analysis of Infiltrating Lymphocytes

The ability of malignant cells to evade the immune system, characterized by tumor escape from both innate and adaptive immune responses, is now accepted as an important hallmark of cancer. Our research on breast cancer focuses on the active role that tumor infiltrating lymphocytes play in tumor progression and patient outcome. Toward this goal, we developed a methodology for the rapid isolation of intact lymphoid cells from normal and abnormal tissues in an effort to evaluate them proximate to their native state. Homogenates prepared using a mechanical dissociator show both increased viability and cell recovery while preserving surface receptor expression compared to enzyme-digested tissues. Furthermore, enzymatic digestion of the remaining insoluble material did not recover additional CD45+ cells indicating that quantitative and qualitative measurements in the primary homogenate likely genuinely reflect infiltrating subpopulations in the tissue fragment. The lymphoid cells in these homogenates can be easily characterized using immunological (phenotype, proliferation, etc.) or molecular (DNA, RNA and/or protein) approaches. CD45+ cells can also be used for subpopulation purification, in vitro expansion or cryopreservation. An additional benefit of this approach is that the primary tissue supernatant from the homogenates can be used to characterize and compare cytokines, chemokines, immunoglobulins and antigens present in normal and malignant tissues. This protocol functions extremely well for human breast tissues and should be applicable to a wide variety of normal and abnormal tissues.

This protocol describes the rapid non-enzymatic dissociation of fresh human tissue fragments for qualitative and quantitative assessment of CD45+ cells (lymphocytes/leukocytes) present in various normal and malignant human tissues. Additionally, the supernatant obtained from the primary tissue homogenate can be collected and stored for further analysis or experimentation.

İnfiltratif Lenfositlerinin Analiz Olmayan enzimatik ayırmak Taze İnsan Dokusuna Basit ve Hızlı Protokolü

The ability of malignant cells to evade the immune system, characterized by tumor escape from both innate and adaptive immune responses, is now accepted ...

Efficient Isolation Protocol for B and T Lymphocytes from Human Palatine Tonsils

Tonsils form a part of the immune system providing the first line of defense against inhaled pathogens. Usually the term &#8220;tonsils&#8221; refers to the palatine tonsils situated at the lateral walls of the oral part of the pharynx. Surgically removed palatine tonsils provide a convenient accessible source of B and T lymphocytes to study the interplay between foreign pathogens and the host immune system. This video protocol describes the dissection and processing of surgically removed human palatine tonsils, followed by the isolation of the individual B and T cell populations from the same tissue sample. We present a method, which efficiently separates tonsillar B and T lymphocytes using an antibody-dependent affinity protocol. Further, we use the method to demonstrate that human adenovirus infects specifically the tonsillar T cell fraction. The established protocol is generally applicable to efficiently and rapidly isolate tonsillar B and T cell populations to study the role of different types of pathogens in tonsillar immune responses.

Palatine tonsils are a rich source of B and T lymphocytes. Here we provide an easy, efficient and rapid protocol to isolate B and T lymphocytes from human palatine tonsils. The method described has been specifically adapted for studies of the viral etiology of tonsil inflammation known as tonsillitis.

İnsan Palatine Bademcikler B ve T Lenfosit için Verimli İzolasyon Protokolü

Tonsils form a part of the immune system providing the first line of defense against inhaled pathogens. Usually the term &#8220;tonsils&#8221; refers to ...

Rapid Molecular Detection and Differentiation of Influenza Viruses A and B

Influenza is a contagious respiratory illness caused by influenza viruses A and B in humans and causes a significant amount of morbidity and mortality every year. The Influenza A and B assay was the first CLIA-waived molecular rapid flu test available. The Influenza A and B test works by employing isothermal amplification with influenza-specific primers followed by target detection with molecular beacon probes. Here, the performance of the Influenza A and B assay on frozen, archived nasopharyngeal swab (NPS) specimens stored in viral transport medium (VTM) were compared to a respiratory panel assay.
The performance of the Influenza A and B assay was evaluated by comparing the results to the respiratory panel reference method. The sensitivity for total influenza virus A was 67.5% (95% CI (CI), 56.6-78.5) and the specificity was 86.9% (CI, 71.0-100). For influenza virus B testing, the sensitivity and specificity were 90.2% (CI, 68.5-100) and 98.8% (CI, 68.5-100), respectively.
This system has the advantage of a significantly shorter test time than any other currently available molecular assay and the simple, pipette-free procedure runs on a fully integrated, closed, small-footprint system. Overall, the Influenza A and B assay evaluated in this study has the potential to serve as a point-of-care rapid influenza diagnostic test.

We describe a rapid, molecular-based Influenza A and B assay. The Influenza assay detects each target within 15 min by employing isothermal amplification with influenza-specific primers followed by target detection with molecular beacon probes. The Influenza A and B assay is user-friendly and required minimal hands-on time to perform.

Hızlı moleküler algılama ve Nezle Virüsleri A ve B farklılaşması

Influenza is a contagious respiratory illness caused by influenza viruses A and B in humans and causes a significant amount of morbidity and mortality ...

Molecular Diffusion in Plasma Membranes of Primary Lymphocytes Measured by Fluorescence Correlation Spectroscopy

Fluorescence correlation spectroscopy (FCS) is a powerful technique for studying the diffusion of molecules within biological membranes with high spatial and temporal resolution. FCS can quantify the molecular concentration and diffusion coefficient of fluorescently labeled molecules in the cell membrane. This technique has the ability to explore the molecular diffusion characteristics of molecules in the plasma membrane of immune cells in steady state (i.e., without processes affecting the result during the actual measurement time). FCS is suitable for studying the diffusion of proteins that are expressed at levels typical for most endogenous proteins. Here, a straightforward and robust method to determine the diffusion rate of cell membrane proteins on primary lymphocytes is demonstrated. An effective way to perform measurements on antibody-stained live cells and commonly occurring observations after acquisition are described. The recent advancements in the development of photo-stable fluorescent dyes can be utilized by conjugating the antibodies of interest to appropriate dyes that do not bleach extensively during the measurements. Additionally, this allows for the detection of slowly diffusing entities, which is a common feature of proteins expressed in cell membranes. The analysis procedure to extract molecular concentration and diffusion parameters from the generated autocorrelation curves is highlighted. In summary, a basic protocol for FCS measurements is provided; it can be followed by immunologists with an understanding of confocal microscopy but with no other previous experience of techniques for measuring dynamic parameters, such as molecular diffusion rates.

A method to measure protein diffusion in membranes of primary immune cells using fluorescence correlation spectroscopy (FCS) is described. In this paper, the use of antibodies for fluorescent labeling is illustrated.

Flüoresan Korelasyon Spektroskopisi Ölçülen İlköğretim Lenfositler Plazma Membranlarda moleküler difüzyon

Fluorescence correlation spectroscopy (FCS) is a powerful technique for studying the diffusion of molecules within biological membranes with high spatial ...

Rapid Quantification of Mitogen-induced Blastogenesis in T Lymphocytes for Identifying Immunomodulatory Drugs

Lymphocyte proliferation in response to antigenic or mitogenic stimulation is a readily quantifiable phenomenon useful for testing immunomodulatory (i.e., immunosuppressive or immunostimulatory) chemical compounds and biologics. One of the earliest steps during mitogenesis is cell enlargement or blastogenic transformation, whereupon the cell volume increases before division. It is usually detectable in the first several hours of T-lymphocyte stimulation. Here, we describe a rapid method to quantify blastogenesis in T lymphocytes isolated from mouse spleens and human peripheral blood mononuclear cells (PBMCs) using an automated cell counter. Various commonly used proliferation assays for the most part are laborious and only reflect the overall population effect rather than individual cellular effects within a population. In contrast, the presented automated cell counter assay provides rapid, direct, and precise measurements of cell diameters that can be used for assessing the effectiveness of various mitogens and immunomodulatory drugs in vitro.

T-lymphocyte mitogenesis is accompanied by blastogenic transformation, whereupon the cell volume enlarges before cell division. Here, we describe a method to quantify blastogenesis in T lymphocytes using an automated cell counter with the capability of measuring cell diameters.

Bağışıklık ilaçlarının tanımlanmasında T lenfositlerinde mitojen kaynaklı blastojenez hızlı bir şekilde belirlenmesini

Lymphocyte proliferation in response to antigenic or mitogenic stimulation is a readily quantifiable phenomenon useful for testing immunomodulatory (i.e., ...