SS è sostenuto in parte dal Med HHMI in Grad formazione di sovvenzione attraverso il Programma TBMM. MHW è sostenuto in parte da un premio alla carriera sviluppo dal Department of Veterans Affairs e il generoso sostegno del Dr. Harold e la signora M. Selzman. Questo lavoro è stato supportato anche in parte da linfoma NIH SPORE concessione P50CA126752 e NIH R01 DK093660.

Giorno 0 1. Isolamento di PBMC da sangue umano <ol><li> Raccogliere 20 ml di sangue umano fresco con prelievo venoso in Na-eparina vacutainer. </li><li> Mix sangue e Advanced RPMI 1640 in 1:1 (v / v) rapporto. </li><li> Aggiungere 20 ml di mezzo Lymphoprep un tubo da centrifuga da 50 ml (25 ° C). Lentamente strato 25-30 ml di sangue RPMI-1640 mix sopra il Lymphoprep. </li><li> Centrifugare a 400 xg per 40 min senza freni. </li><li> Raccogliere sia strati distinti e fuzzy utilizzando una pipetta monouso in 10 ml di PBS 1x (25 ° C) e portare il volume a 50 ml con PBS 1x. </li><li> Centrifugare a 450 xg per 10 min. </li><li> Aspirare il surnatante completamente e aggiungere 20 ml di RPMI 1640 Avanzata. </li><li> Centrifugare a 400 xg per 5 min. </li><li> Aspirare il surnatante. Aggiungere 10 ml di mezzi completi cellule T integrato con 5 ng / ml rhIL-15 preriscaldato a 37 ° C. </li><li> Contare il numero di cellule e la piastra in un cappotto coltura tissutale a 24 pozzettipiastra ed a 2 x 10 6 cellule / pozzetto in completo supporto delle cellule T integrato con 5 ng / ml rhIL-15 Aggiungi acqua sterile per pozzi circostanti. Incubare per una notte in un incubatore umidificato a 37 ° C, 5% di CO 2. </li></ol> Giorno 1 2. Piastre con rivestimento anti-CD28 e anti-CD3 per stimolare le cellule T <ol><li> Diluire anti-CD28 e anti-CD3 anticorpi in acqua sterile alla concentrazione di 1 ug / ml ciascuno. </li><li> Aggiungere 500 ul di soluzione ogni anticorpo a 5 pozzetti marcati di un non-rivestito coltura di tessuti 24 pozzetti. </li><li> Aggiungere acqua sterile a riposo dei pozzetti. Avvolgere la piastra in termoretraibile e mettere in un 4 ° C frigorifero. </li></ol> 3. Nucleofection di non stimolato cellule T <ol><li> Preriscaldare supporti delle cellule T a 37 ° C e con supplemento di 5 ng / ml di rhIL-15. Preparare soluzione completa Nucleofector con l&#39;aggiunta di 500 microlitri del Supplemento Nucleofector 1-2,25 ml di soluzione Nucleofector. </li><li> Laliquot 5 pg ognuno di trasposoni (Zeo-pT-CMV-eGFP) e transposasi (pCMV-piggyBac) in una provetta da microcentrifuga 1,5 ml. Nota: potrebbe essere necessario ottimizzare la quantità e trasposasi DNA trasposone per il trasferimento genico ottimale e per minimizzare tossicità cellulare. I plasmidi possono essere ottenuti da autori richiesta. </li><li> PBMC raccolta dalla piastra di coltura tissutale a 24 pozzetti in un tubo da 50 ml. Contare il numero di cellule. Salvare 2 x 10 6 cellule per uso come controllo durante citometria a flusso. </li><li> Aggiungere 7-10 x 10 6 cellule in una provetta da 15 ml e centrifugare a 400 xg, 5 min, Aspirare il surnatante e finger-flick il pellet. </li><li> Aggiungere 100 ml di soluzione di cellule T nucleofection completo al pellet allentato. </li><li> Aggiungere la soluzione di cellule miscela nella provetta contenente i plasmidi. </li><li> Aggiungere la soluzione-cellula-plasmide miscela al fondo della cuvetta nucleofection. Fare attenzione a non introdurre bolle. </li><li> Nucleofect le cellule che utilizzano programmo U-014 (non stimolate le cellule T, umane, <a href="http://bio.lonza.com/resources/product-instructions/protocols/" target="_blank">http://bio.lonza.com/resources/product-instructions/protocols/</a> ). </li><li> Immediatamente aggiungere 500 microlitri di media preriscaldata con rhIL-15 alla cuvetta. Trasferire le cellule ad un pozzetto di una piastra a 24 pozzetti con 1,5 ml di mezzo preriscaldata con rhIL15. </li><li> Incubare per una notte in un incubatore umidificato a 37 ° C, 5% di CO 2. </li></ol> Giorno 2 4. La stimolazione non specifica delle cellule T <ol><li> Harvest cellule e determinare il numero di cellule. Annullare 0,5 x 10 6 cellule per citometria a flusso per determinare la frequenza di cellule GFP-positive. Utilizzare i non transfettate PBMC come controlli. </li><li> Aspirare la soluzione di anticorpi CD3/28 dalla piastra di coltura tissutale non rivestito e lavare ogni pozzetto con supporto di cellule T. </li><li> Risospendere le cellule nucleofected a 0,5 x 10 6 cellule per ml in mezzi completi CTLsupplementato con 5 ng / ml rhIL-15. Aggiungere 2,0 ml ciascuna delle celle nucleofected in 4 pozzetti della piastra non coltura tissutale. Aggiungere 0,5 x 10 6 cellule non nucleofected al 5 bene. </li><li> Incubare per 3 giorni in un incubatore umidificato a 37 ° C, 5% di CO 2. </li></ol> Giorno 5 <ol><li> Raccogliere le cellule T stimolate dalla non rivestita piastra di coltura tissutale. </li><li> Contare e replate le cellule in una piastra a 24 tessuto ben ricoperto coltura a 0,7 x 10 6 cellule / ml in mezzi di cellule T con 5 ng / ml di IL-15. </li></ol> 7 ° giorno 7. L&#39;analisi dell&#39;espressione genica <ol><li> Cellule Harvest e macchia con anti-umano CD8 (potrebbe anche usare anti-CD3 e anti-CD4) e analizzare con citometria a flusso per l&#39;espressione% GFP. </li></ol> 8 ° giorno (opzionale) 8. L&#39;espansione delle cellule T <ol><li> Il giorno 8 dopo la trasfezione, le cellule T possono essere saltuariamente a T-Cellule supporto con IL-15 ad una densità di 0,7 x 10 6 cellule per pozzetto per un&#39;ulteriore espansione 16. </li></ol>

<ol>
	<li>Cary, L. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Transposon+mutagenesis+of+baculoviruses:+analysis+of+Trichoplusia+ni+transposon+IFP2+insertions+within+the+FP-locus+of+nuclear+polyhedrosis+viruses.">Transposon mutagenesis of baculoviruses: analysis of Trichoplusia ni transposon IFP2 insertions within the FP-locus of nuclear polyhedrosis viruses.</a> Virology. 172 (1), 156 (1989).</li><li>Fraser, M. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Assay+for+movement+of+Lepidopteran+transposon+IFP2+in+insect+cells+using+a+baculovirus+genome+as+a+target+DNA.">Assay for movement of Lepidopteran transposon IFP2 in insect cells using a baculovirus genome as a target DNA.</a> Virology. 211 (2), 397 (1995).</li><li>Ding, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Efficient+transposition+of+the+piggyBac+(PB)+transposon+in+mammalian+cells+and+mice.">Efficient transposition of the piggyBac (PB) transposon in mammalian cells and mice.</a> Cell. 122 (3), 473 (2005).</li><li>Saridey, S. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=PiggyBac+transposon-based+inducible+gene+expression+in+vivo+after+somatic+cell+gene+transfer.">PiggyBac transposon-based inducible gene expression in vivo after somatic cell gene transfer.</a> Mol. Ther. 17 (12), 2115 (2009).</li><li>Nakanishi, H. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=piggyBac+transposon-mediated+long-term+gene+expression+in+mice.">piggyBac transposon-mediated long-term gene expression in mice.</a> Mol. Ther. 18 (4), 707 (2010).</li><li>Wilson, M. H., Coates, C. J., George, A. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=PiggyBac+Transposon-mediated+Gene+Transfer+in+Human+Cells.">PiggyBac Transposon-mediated Gene Transfer in Human Cells.</a> Mol. Ther. 15 (1), 139 (2007).</li><li>Nakazawa, Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Optimization+of+the+PiggyBac+transposon+system+for+the+sustained+genetic+modification+of+human+T+lymphocytes.">Optimization of the PiggyBac transposon system for the sustained genetic modification of human T lymphocytes.</a> J. Immunother. 32 (8), 826 (2009).</li><li>Raja Manuri, P. V. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=piggyBac+transposon/transposase+system+to+generate+CD19-specific+T+cells+for+treatment+of+B-lineage+malignancies.">piggyBac transposon/transposase system to generate CD19-specific T cells for treatment of B-lineage malignancies.</a> Hum. Gene Ther. 21 (4), 427 (2010).</li><li>Doherty, J. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Hyperactive+piggyBac+gene+transfer+in+human+cells+and+in+vivo.">Hyperactive piggyBac gene transfer in human cells and in vivo.</a> Hum. Gene Ther. , (2011).</li><li>Yusa, K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+hyperactive+piggyBac+transposase+for+mammalian+applications.">A hyperactive piggyBac transposase for mammalian applications.</a> Proc. Natl. Acad. Sci. U.S.A. 108 (4), 1531 (2011).</li><li>Bonini, C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Genetic+modification+of+T+cells.">Genetic modification of T cells.</a> Biol. Blood Marrow Transplant. 17, S15-S20 (2011).</li><li>Hackett, P. B., Largaespada, D. A., Cooper, L. J. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+transposon+and+transposase+system+for+human+application.">A transposon and transposase system for human application.</a> Mol. Ther. 18 (4), 1531 (2010).</li><li>Galvan, D. L. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Genome-wide+mapping+of+PiggyBac+transposon+integrations+in+primary+human+T+cells.">Genome-wide mapping of PiggyBac transposon integrations in primary human T cells.</a> J. Immunother. 32 (8), 837 (2009).</li><li>Nakazawa, Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=PiggyBac-Mediated+Cancer+Immunotherapy+Using+EBV-Specific+Cytotoxic+T-Cells+Expressing+HER2-Specific+Chimeric+Antigen+Receptor.">PiggyBac-Mediated Cancer Immunotherapy Using EBV-Specific Cytotoxic T-Cells Expressing HER2-Specific Chimeric Antigen Receptor.</a> Mol. Ther. 19 (12), 2133 (2011).</li><li>Huye, L. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Combining+mTor+Inhibitors+With+Rapamycin-resistant+T+Cells:+A+Two-pronged+Approach+to+Tumor+Elimination.">Combining mTor Inhibitors With Rapamycin-resistant T Cells: A Two-pronged Approach to Tumor Elimination.</a> Mol. Ther. 19 (12), 2239 (2011).</li><li>Vera, J. F. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Accelerated+production+of+antigen-specific+T+cells+for+preclinical+and+clinical+applications+using+gas-permeable+rapid+expansion+cultureware+(G-Rex).">Accelerated production of antigen-specific T cells for preclinical and clinical applications using gas-permeable rapid expansion cultureware (G-Rex).</a> J. Immunother. 33 (3), 305 (2010).</li><li>Kahlig, K. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Multiplexed+transposon-mediated+stable+gene+transfer+in+human+cells.">Multiplexed transposon-mediated stable gene transfer in human cells.</a> Proc. Natl. Acad. Sci. U.S.A. 107 (4), 1343 (2010).</li></ol>

Nessun conflitto di interessi dichiarati.

Il metodo qui descritto consente la modifica stabile del transgene primari linfociti T umani. Abbiamo precedentemente testato l&#39;utilizzo del sistema piggyBac trasposone per modificare le cellule T per esprimere un gene reporter (per più di 4 settimane), un non immunogeno gene suicida, un recettore antigene chimerico per immunoterapia adottiva (per più di 100 giorni), e per progettare la resistenza ai farmaci immunosoppressivi 7,13-15. Non virale modifica di cellule T per l&#39;immunoterapia ado...

<table border="1"><tbody><tr><td> Nome del reagente </td><td> Azienda </td><td> Numero di catalogo </td><td> Commenti (opzionale) </td></tr><tr><td> Lympholyte </td><td> Cedarlane </td><td> CL5015 </td><td></td></tr><tr><td> Avanzata RPMI 1640 </td><td> LifeTechnologies </td><td> 12633020 </td><td></td></tr><tr><td> Hyclone siero fetale bovino </td><td> Fisher Scientific </td><td> SH3008803 </td><td></td></tr><tr><td> Glutamax-I Supplemento </td><td> LifeTechnologies </td><td> 35050-061 </td><td></td></tr><tr><td> IL-15 umana ricombinante Protein </td><td> eBioscience </td><td> 14-8159 </td><td></td></tr><tr><td> EndoFree Kit Maxi Plasmid </td><td> Qiagen </td><td> 12362 </td><td></td></tr><tr><td> Amaxa Nucleofector </td><td> Lonza </td><td> AAD-1001S </td><td> &amp; Nbsp; </td></tr><tr><td> Umano delle cellule T Nucleofector Kit </td><td> Lonza </td><td> VPA-1002 </td><td></td></tr><tr><td> CD8-APC </td><td> Southern Biotech </td><td> 9536-11 </td><td></td></tr><tr><td> Anti-Human CD3 </td><td> eBioscience </td><td> 16-0037-81 </td><td></td></tr><tr><td> Anti-Human CD28 </td><td> BD Pharmingen </td><td> 555725 </td><td></td></tr><tr><td> Tavola 24 Tissue Culture trattati bene </td><td> BD Falcon </td><td> 353047 </td><td></td></tr><tr><td> 24 Tissue Culture Beh non trattato Piatto </td><td> BD Falcon </td><td> 351147 </td><td></td></tr><tr><td></td><td></td><td></td><td> Completa delle cellule T supporti composizione 1x avanzata RPMI 1640 5% di calore siero fetale bovino inattivato 2 mM GlutamaxIM-I </td></tr></tbody></table>

piggybac transposon system modification of primary human t cells

Il sistema piggyBac trasposoni è naturalmente attivo, originariamente derivato dal 1,2 cavolo crochet falena. Questo non virale sistema è basato plasmide, più comunemente utilizzando due plasmidi con uno esprimere l&#39;enzima piggyBac trasposasi e un trasposone plasmide ospitare il gene (s) di interesse tra elementi ripetute invertite che sono necessarie per l&#39;attività di trasferimento genico. PiggyBac trasferimento genico media attraverso un meccanismo &quot;taglia e incolla&quot; che la trasposasi integra il segmento trasposoni nel genoma della cellula bersaglio (s) di interesse. PiggyBac è dimostrato efficace attività consegna del gene in una vasta gamma di 1,2 insetto, mammifero 3-5, e umano cells6 inclusione dei linfociti T umani 7,8. Recentemente, un trasposasi iperattivo piggyBac è stata generata migliorare l&#39;efficienza di trasferimento genico 9,10. Linfociti T umani sono di intere clinicast per l&#39;immunoterapia adottiva del cancro 11. Da segnalare, il primo studio clinico che ha coinvolto la modifica trasposone delle cellule T umane che utilizzano il sistema di trasposoni Sleeping Beauty è stato approvato 12. Abbiamo precedentemente valutato l&#39;utilità della piggyBac come non virale metodologia per modificazione genetica di cellule T umane. Abbiamo trovato piggyBac essere efficiente una modificazione genetica di cellule T con un gene reporter e un non immunogeno gene suicida inducibile 7. Analisi dei siti di integrazione genomica ha rivelato una mancanza di preferenza per l&#39;integrazione in zona di noti proto-oncogeni 13. Abbiamo usato piggyBac per modificare gene-linfociti T citotossici per trasportare un antigene recettore chimerico diretto contro l&#39;antigene tumorale HER2, e trovato che geni modificati cellule T mediato mirata uccisione delle cellule tumorali HER2-positivi in vitro e in vivo in un modello di topo ortotopico 14. Abbiamo anche utilizzato piggyBacper generare cellule T resistenti alla rapamicina, che dovrebbero essere utili nelle terapie del cancro in cui è utilizzato rapamicina 15. Qui, si descrive un metodo per utilizzare piggyBac modificare geneticamente primarie cellule T umane. Questo include isolamento delle cellule mononucleate del sangue periferico (PBMC) da sangue umano seguita dalla cultura, modificazione genetica, e l&#39;attivazione di cellule T. Ai fini della presente relazione, le cellule T sono state modificate con un gene reporter (eGFP) per l&#39;analisi e la quantificazione dell&#39;espressione genica mediante citometria a flusso. PiggyBac può essere utilizzato per modificare cellule T con una varietà di geni di interesse. Anche se abbiamo usato piggyBac per dirigere le cellule T ad antigeni tumorali 14, abbiamo usato anche piggyBac per aggiungere un interruttore di sicurezza inducibile per eliminare cellule gene modificato se necessario 7. La capacità di carico di grandi dimensioni di piggyBac ha anche permesso di trasferimento genicoun grande rapamicina mTOR molecola resistente (15 kb) 15. Pertanto, presentiamo una non virale metodologia stabile gene-modifica di cellule T umane primarie per una varietà di scopi.

Uno schema dimostrando i passaggi modificare geneticamente linfociti T umani con un gene reporter (eGFP) è mostrato in Figura 1. Questi plasmidi sono disponibili su richiesta presso gli autori. Un schemtic dimostrando i passaggi geneticamente modificati linfociti T umani con un gene reporter (eGFP) è showin in Figura 2. È necessario attivare le cellule T in modo da farli dividere, espandere e diffondere nella cultura. Modificati cellule umane T sono state poi coltivate ed analizzate ...

Watch this Scientific Journal Video about piggyBac Transposon System Modification of Primary Human T Cells at JoVE.com

piggyBac Transposon System Modification of Primary Human T Cells

Descriviamo un metodo per modificare geneticamente primarie cellule T umane con un transgene utilizzando il non virale<em&gt; PiggyBac</em&gt; Trasposone sistema. Cellule T modificata per usare la<em&gt; PiggyBac</em&gt; Trasposone mostra sistema stabile espressione del transgene.

piggyBac Transposon modifica del sistema di cellule primarie umane T

The piggyBac transposon system is naturally active, originally derived from the cabbage looper moth1,2. This non-viral system is plasmid based, most ...

piggybac-transposon-system-modification-of-primary-human-t-cells

Research

JoVE Journal

Immunology and Infection

piggyBac Transposon System Modification of Primary Human T Cells

17.1K Views.  Baylor College of Medicine. Descriviamo un metodo per modificare geneticamente primarie cellule T umane con un transgene utilizzando il non virale PiggyBac Trasposone sistema. Cellule T modificata per usare la PiggyBac Trasposone mostra sistema stabile espressione del transgene.

Video: piggyBac Transposon System Modification of Primary Human T Cells

Expansion of Human Peripheral Blood  &gamma;&delta; T Cells using Zoledronate

Human &gamma;&delta; T cells can recognize and respond to a wide variety of stress-induced antigens, thereby developing innate broad anti-tumor and anti-infective activity.1 The majority of &gamma;&delta; T cells in peripheral blood have the V&gamma;9V&delta;2 T cell receptor. These cells recognize antigen in a major histocompatibility complex-independent manner and develop strong cytolytic and Th1-like effector functions.1Therefore, &gamma;&delta; T cells are attractive candidate effector cells for cancer immunotherapy. V&gamma;9V&#x03B4;2 T cells respond to phosphoantigens such as (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate (HMBPP), which is synthesized in bacteria via isoprenoid biosynthesis;2 and isopentenyl pyrophosphate (IPP), which is produced in eukaryotic cells through the mevalonate pathway.3 In physiological condition, the generation of IPP in nontransformed cell is not sufficient for the activation of &gamma;&delta; T cells. Dysregulation of mevalonate pathway in tumor cells leads to accumulation of IPP and &gamma;&delta; T cells activation.3 Because aminobisphosphonates (such as pamidronate or zoledronate) inhibit farnesyl pyrophosphate synthase (FPPS), the enzyme acting downstream of IPP in the mevalonate pathway, intracellular levels of IPP and sensitibity to &gamma;&delta; T cells recognition can be therapeutically increased by aminobisphosphonates. IPP accumulation is less efficient in nontransfomred cells than tumor cells with a pharmacologically relevant concentration of aminobisphosphonates, that allow us immunotherapy for cancer by activating &gamma;&delta; T cells with aminobisphosphonates. 4 Interestingly, IPP accumulates in monocytes when PBMC are treated with aminobisphosphonates, because of efficient drug uptake by these cells. 5 Monocytes that accumulate IPP become antigen-presenting cells and stimulate V&gamma;9V&delta;2 T cells in the peripheral blood.6 Based on these mechanisms, we developed a technique for large-scale expansion of &gamma;&delta; T cell cultures using zoledronate and interleukin-2 (IL-2).7 Other methods for expansion of &gamma;&delta; T cells utilize the synthetic phosphoantigens bromohydrin pyrophosphate (BrHPP)8 or 2-methyl-3-butenyl-1-pyrophosphate (2M3B1PP).9 All of these methods allow ex vivo expansion, resulting in large numbers of &gamma;&delta; T cells for use in adoptive immunotherapy. However, only zoledronate is an FDA-approved commercially available reagent. Zoledronate-expanded &gamma;&delta; T cells display CD27-CD45RA- effector memory phenotype and thier function can be evaluated by IFN-&gamma; production assay. 7

Expansion of Human Peripheral Blood  &amp;#947;&amp;#948; T Cells using Zoledronate

A method to expand &gamma;&delta; T cells from peripheral blood mononuclear cells (PBMC) is described. PBMC-derived &gamma;&delta; T cells are stimulated and expanded using zoledronate and interleukin-2 (IL-2). Large scale expansion of &gamma;&delta; T cells can be applied to autologous cellular immunotherapy of cancer.

Espansione del sangue periferico umano γδ cellule T con Zoledronato

Human &gamma;&delta; T cells can recognize and respond to a wide variety of stress-induced antigens, thereby developing innate broad anti-tumor and ...

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Immunologia e infezioni

Determining Optimal Cytotoxic Activity of Human Her2neu Specific CD8 T cells by Comparing the Cr51 Release Assay to the xCELLigence System

Cytotoxic CD8 T cells constitute a subgroup of T cells that are capable of inducing the death of infected or malignant host cells1. These cells express a specialized receptor, called the T cell receptor (TCR), which can recognize a specific antigenic peptide bound to HLA class I molecules2. Engagement of infected cells or tumor cells through their HLA class I molecule results in production of lytic molecules such as granzymes and perforin resulting in target cell death. While it is useful to determine frequencies of antigen-specific CD8 T cells using assays such as the ELIspot or flow cytometry, it is also helpful to ascertain the strength of CD8 T cell responses using cytotoxicity assays3. The most recognizable assay for assessing cytotoxic function is the Chromium Release Assay (CRA), which is considered a standard assay 4. The CRA has several limitations, including exposure of cells to gamma radiation, lack of reproducibility, and a requirement for large numbers of cells. Over the past decade, there has been interest in adopting new strategies to overcome these limitations. Newer approaches include those that measure caspase 
release 4, BLT esterase activity 5 and surface expression of CD107 6. The impedance-based assay, using the Roche xCelligence system, was examined in the present paper for its potential as an alternative to the CRA. Impedance or opposition to an electric current occurs when adherent tumor cells bind to electrode plates. Tumor cells detach following killing and electrical impedance is reduced which can be measured by the xCelligence system. The ability to adapt the impedance-based approach to assess cell-mediated killing rests on the observation that T cells do not adhere tightly to most surfaces and do not appear to have much impact on impedance thus diminishing any concern of direct interference of the T cells with the measurement. Results show that the impedance-based assay can detect changes in the levels of antigen-specific cytotoxic CD8 T cells with increased sensitivity relative to the standard CRA. Based on these results, impedance-based approaches may be good alternatives to CRAs or other approaches that aim to measure cytotoxic CD8 T cell functionality.

The chromium release assay, a common assay for detecting cytotoxic T cell activity, has several limitations. Using antigen-specific CD8 T cells and the human breast cancer tumor line, SKBR3, in the present article, an impedance-based approach was examined for the capability of detecting cell killing.

Determinazione ottimale attività citotossica di specifiche cellule T umane Her2neu CD8 confrontando il Cr51 saggio di rilascio al Sistema xCELLigence

Cytotoxic CD8 T cells constitute a subgroup of T  cells that are capable of inducing the death of infected or malignant host  cells1. These cells express ...

Generation of Induced Regulatory T Cells from Primary Human Na&iuml;ve and Memory T Cells

The development and maintenance of immunosuppressive CD4+ regulatory T cells (Tregs) contribute to the peripheral tolerance needed to remain in immunologic homeostasis with the vast amount of self and commensal antigens in and on the human body. Perturbations in the balance between Tregs and inflammatory conventional T cells can result in immunopathology or cancer. Although therapeutic injection of Tregs has been shown to be efficacious in murine models of colitis1 , type I diabetes2 , rheumatoid arthritis and graft versus host disease,4 several fundamental differences in human versus mouse Treg biology5 has thus far precluded clinical use. The lack of sufficient number, purity, stability and homing specificity of therapeutic Tregs necessitated a dynamic platform of human Treg development on which to optimize conditions for their ex vivo expansion6.
Here we describe a method for the differentiation of induced Tregs (iTregs) from a single human peripheral blood donor which can be broken down into four stages: isolation of peripheral blood mononuclear cells, magnetic selection of CD4+ T cells, in vitro cell culture and fluorescence activated cell sorting (FACS) of T cell subsets. Since the Treg signature transcription factor forkhead box P3 (FoxP3) is an activation-induced transcription factor in humans7 and no other unique marker exists, a combinatorial panel of markers must be used to identify T cells with suppressor activity. After six days in culture, cells in our system can be demarcated into na&iuml;ve T cells, memory T cells or iTregs based on their relative expression of CD25 and CD45RA. As memory and na&iuml;ve T cells have different reported polarization requirements and plasticities8 , pre-sorting of the initial T cell population into CD45RA+ and CD45RO+ subsets can be used to examine these discrepancies. Consistent with others, our CD25HiCD45RA- iTregs express high levels of FoxP39 , GITR and CTLA-411 and low levels of CD12712 . Following FACS of each population, resultant cells can be used in a suppressor assay which evaluates the relative ability to retard the proliferation of carboxyfluorescein succinimidyl ester (CFSE)-labeled autologous T cells.

Generation of Induced Regulatory T Cells from Primary Human Na&amp;#239;ve and Memory T Cells

We describe a method for generating regulatory, memory and na&#239;ve T cells from a single human blood donor. Polarized Tregs can be then compared to other subsets in a variety of genetic and functional applications with genetic homogeneity, including a suppression assay also detailed here.

Generazione di cellule T regolatrici indotte da cellule primarie umane T naive e memoria

The development and maintenance of immunosuppressive CD4+ regulatory T cells (Tregs) contribute to the peripheral tolerance needed to remain in ...

Assessing the Innate Sensing of HIV-1 Infected CD4+ T Cells by Plasmacytoid Dendritic Cells Using an Ex vivo Co-culture System.

HIV-1 innate sensing requires direct contact of infected CD4+ T cells with plasmacytoid dendritic cells (pDCs). In order to study this process, the protocols described here use freshly isolated human peripheral blood mononuclear cells (PBMCs) or plasmacytoid dendritic cells (pDCs) to sense infections in either T cell line (MT4) or heterologous primary CD4+ T cells. In order to ensure proper sensing, it is essential that PBMC are isolated immediately after blood collection and that optimal percentage of infected T cells are used. Furthermore, multi-parametric flow cytometric staining can be used to confirm that PBMC samples contain the different cell lineages at physiological ratios. A number of controls can also be included to evaluate viability and functionality of pDCs. These include, the presence of specific surface markers, assessing cellular responses to known agonist of Toll-Like Receptors (TLR) pathways, and confirming a lack of spontaneous type-I interferon (IFN) production. In this system, freshly isolated PBMCs or pDCs are co-cultured with HIV-1 infected cells in 96 well plates for 18-22 hr. Supernatants from these co-cultures are then used to determine the levels of bioactive type-I IFNs by monitoring the activation of the ISGF3 pathway in HEK-Blue IFN-&#945;/&#946; cells. Prior and during co-culture conditions, target cells can be subjected to flow cytometric analysis to determine a number of parameters, including the percentage of infected cells, levels of specific surface markers, and differential killing of infected cells. Although, these protocols were initially developed to follow type-I IFN production, they could potentially be used to study other imuno-modulatory molecules released from pDCs and to gain further insight into the molecular mechanisms governing HIV-1 innate sensing.

Assessing the Innate Sensing of HIV-1 Infected CD4+ T Cells by Plasmacytoid Dendritic Cells Using an Ex vivo Co-culture System.

Unlike cell-free HIV-1 particles, infected CD4+ T cells are effectively sensed by plasmacytoid dendritic cells (pDCs). This manuscript describes a method where peripheral blood mononuclear cells (PBMCs) or isolated pDCs are co-cultured with HIV-1 infected T cells to evaluate innate sensing by pDCs as assessed by release of type-I IFN.

Valutare l&#39;innato rilevamento dell&#39;infezione da HIV-1 CD4 infetti<sup&gt; +</sup&gt; Cellule T dalle cellule dendritiche plasmacitoidi Utilizzando un<em&gt; Ex vivo</em&gt; Sistema di co-coltura.

HIV-1 innate sensing requires direct contact of infected CD4+ T cells with plasmacytoid dendritic cells (pDCs). In order to study this process, the ...

Identification of Novel Genes Associated with Alginate Production in Pseudomonas aeruginosa Using Mini-himar1 Mariner Transposon-mediated Mutagenesis

Pseudomonas aeruginosa is a Gram-negative, environmental bacterium with versatile metabolic capabilities. P. aeruginosa is an opportunistic bacterial pathogen which establishes chronic pulmonary infections in patients with cystic fibrosis (CF). The overproduction of a capsular polysaccharide called alginate, also known as mucoidy, promotes the formation of mucoid biofilms which are more resistant than planktonic cells to antibiotic chemotherapy and host defenses. Additionally, the conversion from the nonmucoid to mucoid phenotype is a clinical marker for the onset of chronic infection in CF. Alginate overproduction by P. aeruginosa is an endergonic process which heavily taxes cellular energy. Therefore, alginate production is highly regulated in P. aeruginosa. To better understand alginate regulation, we describe a protocol using the mini-himar1 transposon mutagenesis for the identification of novel alginate regulators in a prototypic strain PAO1. The procedure consists of two basic steps. First, we transferred the mini-himar1 transposon (pFAC) from host E. coli SM10/&#955;pir into recipient P. aeruginosa PAO1 via biparental conjugation to create a high-density insertion mutant library, which were selected on Pseudomonas isolation agar plates supplemented with gentamycin. Secondly, we screened and isolated the mucoid colonies to map the insertion site through inverse PCR using DNA primers pointing outward from the gentamycin cassette and DNA sequencing. Using this protocol, we have identified two novel alginate regulators, mucE (PA4033) and kinB (PA5484), in strain PAO1 with a wild-type mucA encoding the anti-sigma factor MucA for the master alginate regulator AlgU (AlgT, &#963;22). This high-throughput mutagenesis protocol can be modified for the identification of other virulence-related genes causing change in colony morphology.

Identification of Novel Genes Associated with Alginate Production in Pseudomonas aeruginosa Using Mini-himar1 Mariner Transposon-mediated Mutagenesis

Here we describe a protocol using the mini-himar1 mariner transposon-mediated mutagenesis for generating a high-density insertion mutant library to screen, isolate and identify novel alginate regulators in the prototypic Pseudomonas aeruginosa strain PAO1.

Identificazione di geni novelli associati con alginato di produzione in<em&gt; Pseudomonas aeruginosa</em&gt; Utilizzo Mini-<em&gt; Himar1</em&gt; Mutagenesi Mariner Transposon-mediata

Pseudomonas aeruginosa is a Gram-negative, environmental bacterium with versatile metabolic capabilities. P. aeruginosa is an opportunistic bacterial ...

Generation of Human Alloantigen-specific T Cells from Peripheral Blood

The study of human T lymphocyte biology often involves examination of responses to activating ligands. T cells recognize and respond to processed peptide antigens presented by MHC (human ortholog HLA) molecules through the T cell receptor (TCR) in a highly sensitive and specific manner. While the primary function of T cells is to mediate protective immune responses to foreign antigens presented by self-MHC, T cells respond robustly to antigenic differences in allogeneic tissues. T cell responses to alloantigens can be described as either direct or indirect alloreactivity. In alloreactivity, the T cell responds through highly specific recognition of both the presented peptide and the MHC molecule. The robust oligoclonal response of T cells to allogeneic stimulation reflects the large number of potentially stimulatory alloantigens present in allogeneic tissues. While the breadth of alloreactive T cell responses is an important factor in initiating and mediating the pathology associated with biologically-relevant alloreactive responses such as graft versus host disease and allograft rejection, it can preclude analysis of T cell responses to allogeneic ligands. To this end, this protocol describes a method for generating alloreactive T cells from naive human peripheral blood leukocytes (PBL) that respond to known peptide-MHC (pMHC) alloantigens. The protocol applies pMHC multimer labeling, magnetic bead enrichment and flow cytometry to single cell in vitro culture methods for the generation of alloantigen-specific T cell clones. This enables studies of the biochemistry and function of T cells responding to allogeneic stimulation.

This article describes a method for the generation and propagation of human T cell clones that specifically respond to a defined alloantigen. This protocol can be adapted for cloning human T cells specific for a variety of peptide-MHC ligands.

Generazione di Human alloantigene-specifiche cellule T da sangue periferico

The study of human T lymphocyte biology often involves examination of responses to activating ligands. T cells recognize and respond to processed peptide ...

Assessment of the Synaptic Interface of Primary Human T Cells from Peripheral Blood and Lymphoid Tissue

The current understanding of the dynamics and structural features of T-cell synaptic interfaces has been largely determined through the use of glass-supported planar bilayers and in vitro-derived T-cell clones or lines1,2,3,4. How these findings apply to the primary human T cells isolated from blood or lymphoid tissues is not known, partly due to significant difficulties in obtaining a sufficient number of cells for analysis5. Here we address this through the development of a technique exploiting multichannel flow slides to build planar lipid bilayers containing activating and adhesion molecules. The low height of the flow slides promotes rapid cell sedimentation in order to synchronize cell:bilayer attachment, thereby allowing researchers to study the dynamic of the synaptic interface formation and the kinetics of the granules release. We apply this approach to analyze the synaptic interface of as few as 104 to 105 primary cryopreserved T cells isolated from lymph nodes (LN) and peripheral blood (PB). The results reveal that the novel planar lipid bilayer technique enables the study of the biophysical properties of primary human T cells derived from blood and tissues in the context of health and disease.

The protocol describes a technique to study the ability of primary polyclonal human T cells to form synaptic interfaces using planar lipid bilayers. We use this technique to show the differential synapse formation capability of human primary T cells derived from lymph nodes and peripheral blood.

Valutazione dell'interfaccia sinaptica primaria umana delle cellule di T dal sangue periferico e tessuto linfoide

The current understanding of the dynamics and structural features of T-cell synaptic interfaces has been largely determined through the use of ...

Pneumococcus Infection of Primary Human Endothelial Cells in Constant Flow

Interaction of Streptococcus pneumoniae with the surface of endothelial cells is mediated in blood flow via mechanosensitive proteins such as the Von Willebrand Factor (VWF). This glycoprotein changes its molecular conformation in response to shear stress, thereby exposing binding sites for a broad spectrum of host-ligand interactions. In general, culturing of primary endothelial cells under a defined shear flow is known to promote the specific cellular differentiation and the formation of a stable and tightly linked endothelial layer resembling the physiology of the inner lining of a blood vessel. Thus, the functional analysis of interactions between bacterial pathogens and the host vasculature involving mechanosensitive proteins requires the establishment of pump systems that can simulate the physiological flow forces known to affect the surface of vascular cells.
The microfluidic device used in this study enables a continuous and pulseless recirculation of fluids with a defined flow rate. The computer-controlled air-pressure pump system applies a defined shear stress on endothelial cell surfaces by generating a continuous, unidirectional, and controlled medium flow. Morphological changes of the cells and bacterial attachment can be microscopically monitored and quantified in the flow by using special channel slides that are designed for microscopic visualization. In contrast to static cell culture infection, which in general requires a sample fixation prior to immune labeling and microscopic analyses, the microfluidic slides enable both the fluorescence-based detection of proteins, bacteria, and cellular components after sample fixation; serial immunofluorescence staining; and direct fluorescence-based detection in real time. In combination with fluorescent bacteria and specific fluorescence-labeled antibodies, this infection procedure provides an efficient multiple component visualization system for a huge spectrum of scientific applications related to vascular processes.

This study describes the microscopic monitoring of pneumococcus adherence to von Willebrand factor strings produced on the surface of differentiated human primary endothelial cells under shear stress in defined flow conditions. This protocol can be extended to detailed visualization of specific cell structures and quantification of bacteria by applying differential immunostaining procedures.

Infezione da pneumococco delle cellule primarie endoteliali nel flusso costante

Interaction of Streptococcus pneumoniae with the surface of endothelial cells is mediated in blood flow via mechanosensitive proteins such as the Von ...

Production of Human CRISPR-Engineered CAR-T Cells

Adoptive cell therapies using chimeric antigen receptor T cells (CAR-T cells) have demonstrated remarkable clinical efficacy in patients with hematological malignancies and are currently being investigated for various solid tumors. CAR-T cells are generated by removing T cells from a patient's blood and engineering them to express a synthetic immune receptor that redirects the T-cells to recognize and eliminate target tumor cells. Gene editing of CAR-T cells has the potential to improve safety of current CAR-T cell therapies and further increase the efficacy of CAR-T cells. Here, we describe methods for the activation, expansion, and characterization of human CRISPR-engineered CD19 directed CAR-T cells. This comprises transduction of the CAR lentiviral vector and use of single guide RNA (sgRNA) and Cas9 endonuclease to target genes of interest in T cells. The methods described in this protocol can be universally applied to other CAR constructs and target genes beyond the ones used for this study. Furthermore, this protocol discusses strategies for gRNA design, lead gRNA selection and target gene knockout validation to reproducibly achieve high-efficiency, multiplex CRISPR-Cas9 engineering of clinical grade human T cells.

Here, we present a protocol for gene editing in primary human T cells using CRISPR Cas Technology to modify CAR-T cells.

Produzione di cellule CAR-T umane ingegnerizzate CRISPR

Adoptive cell therapies using chimeric antigen receptor T cells (CAR-T cells) have demonstrated remarkable clinical efficacy in patients with ...

Real-time Monitoring of Mitochondrial Respiration in Cytokine-differentiated Human Primary T Cells

During activation, the metabolism of T cells adapts to changes that impact their fate. An increase in mitochondrial oxidative phosphorylation is indispensable for T cell activation, and the survival of memory T cells is dependent on mitochondrial remodeling. Consequently, this affects the long-term clinical outcome of cancer immunotherapies. Changes in T cell quality are often studied by flow cytometry using well-known surface markers and not directly by their metabolic state. This is an optimized protocol for measuring real-time mitochondrial respiration of primary human T cells using an Extracellular Flux Analyzer and the cytokines IL-2 and IL-15, which differently affect T cell metabolism. It is shown that the metabolic state of T cells can clearly be distinguished by measuring the oxygen consumption when inhibiting key complexes in the metabolic pathway and that the accuracy of these measurements is highly dependent on optimal inhibitor concentration and inhibitor injection strategy. This standardized protocol will help implement mitochondrial respiration as a standard for T cell fitness in monitoring and studying cancer immunotherapies.

Metabolic adaptation is fundamental for T cells as it dictates differentiation, persistence, and cytotoxicity. Here, an optimized protocol for monitoring mitochondrial respiration in ex vivo cytokine-differentiated human primary T cells is presented.