Summary

Otoimmünite karşı Kök Hücre türetilmiş antijen-özgü düzenleyici T hücrelerinin gelişimini

Published: November 08, 2016
doi:

Summary

We present here a method to develop functional antigen (Ag)-specific regulatory T cells (Tregs) from induced pluripotent stem cells (iPSCs) for immunotherapy of autoimmune arthritis in a murine model.

Abstract

Otoimmün hastalıklar nedeniyle immünolojik kendine karşı direncini kaybı ortaya çıkar. Düzenleme T hücreleri (Tregs) immünolojik kendine karşı direncini önemli aracılarıdır. Periferik kanda dolaşan Tregs% 2 – yaklaşık 1 ile farelerde ve insanlarda olgun CD4 + T hücre alt-popülasyonu% 10 – Tregs yaklaşık 5 temsil etmektedir. Uyarılmış pluripotent kök hücreler (iPSCs) potansiyel oto-bağışıklık hastalıkları, hücre bazlı terapiler için kullanılacak sahip fonksiyonel Tregs içine ayırt edilebilir. Burada, iPSCs gelen antijen (Ag) 'e özgü Tregs (yani, iPSC-Treg'ler) geliştirmek için bir yöntem mevcut. yöntem iPSCs olarak transkripsiyon faktörü Foxp3 ve Ag-spesifik T hücresi reseptörü (TCR) içeren ve Çentik ifade OP9 stromal hücreleri üzerinde farklılaşan göre delta-benzeri (DL) 1 ve DL4 ligandları. In vitro farklılaştırma ardından, iPSC-Treg'ler CD4, CD8, CD3, CD25, Foxp3 ve Ag-spesifik TCR ifade Ag uyarısına cevap verebilmektedir.Bu yöntem, başarılı bir murin modelinde otoimmün artrit, hücre bazlı tedavi uygulanmıştır. Ag-teşvikli artrit (AIA) tohumlu zeytin farelere bu Ag-spesifik iPSC-Tregs adoptif nakli eklem iltihabı azaltmak ve şişme ve kemik kaybını önlemek için yeteneğine sahiptir.

Introduction

Autoimmune arthritis is a systemic disease characterized by hyperplasia of synovial tissue and progressive destruction of articular cartilage, bone, and ligaments1. The defective generation or function of Tregs in autoimmune arthritis contributes to chronic inflammation and tissue injury because Tregs play a crucial role in preventing the development of auto-reactive immune cells.

Manipulation of Tregs is an ideal strategy for the development of therapies to suppress inflammation in an Ag-dependent manner. For Treg-based immunotherapy, the specificity of the transferred Tregs is important for the treatment of ongoing autoimmunity2. To exhibit the suppressive activity, Tregs need to migrate and be retained at the afflicted region, which can be directed by the specificity of the TCR for the Ag at that location3. Although polyclonal Tregs may contain a small population containing this Ag specificity from their TCRs, the numbers of these Ag-specific Tregs are usually low. Consequently, cell-based therapies using polyclonal Tregs against autoimmune disorders require adoptive transfers of a large number of Tregs4,5. Because pluripotent stem cells (PSCs) have the ability to develop into any type of cell, Ag-specific PSC-Tregs may prove to be good candidates for Treg-based immunotherapy. Previous studies have shown the successful development of PSC-derived T cells, including Tregs6-8.

Here, we describe a protocol to develop Ag-specific iPSC-Tregs. We further describe a cell-based therapy of autoimmune arthritis in a murine model using such Tregs. This method is based upon genetically modifying murine iPSCs with Ag-specific TCRs and the transcriptional factor FoxP3. The engineered iPSCs then differentiate into Ag-specific Tregs on the OP9 stromal cells expressing Notch ligands DL1, DL4, and MHC-II (I-Ab) molecules in the presence of cytokines mFlt3L and mIL-7. These Ag-specific iPSC-Tregs can produce suppressive cytokines, such as TGF-β and IL-10, when stimulated with the Ag, and adoptive transfer of such Tregs has the ability to suppress AIA development in a murine model. The described protocol can be used to develop stem cell-derived Ag-specific Tregs for potential therapeutic interventions.

Protocol

Tüm hayvan deneyleri Tıp Hayvan Bakım Komitesi Pennsylvania State Üniversitesi (IACUC protokolü # 45470) tarafından onaylanır ve Laboratuar Hayvan Bakımı Değerlendirme ve Akreditasyon Derneği kurallarına uygun olarak yapılmaktadır. 1. Kök Hücre Kültürü kaplamak için 37 ° C (kuluçka) en az 30 dakika boyunca% 0.1 jelatin, 10 ml plakası olan bir 10 cm tabak inkübe edin. Çanak ve levha 3 x 10 6 jelatinin çıkarın SNL76 / 7 hücreleri ı?…

Representative Results

28. günde, burada gösterildiği gibi, Ag-spesifik Tregs esas CD3 ve Ag-spesifik TCR iki T hücre işaretçileri olarak ifade edilmiştir. CD3 + TCRVβ5 + popülasyonu CD4 ifade edilmiştir. Tipik olarak, doğal olarak T regs (nTregs üretme) meydana gelen ve ektopik Foxp3 T hücrelerinde yüksek seviyelerde ifade edilmiştir, aynı zamanda CD25, CD127, ve CTLA-4 olarak ifade CD3 + TCRVβ5 + CD4 + hücrelerinin, çoğu. A…

Discussion

Bu protokol, kritik bir adımdır TCR / FoxP3 gen transduced iPSCs in vitro farklılaştırma olduğunu. In vitro Notch sinyal T hücre soyu doğru gelişimini uyarmaktadır. CD4 + FoxP3 + Tregs içine iPSCs ayırt etmek, biz OP9-DL1 / DL4 / IA b hücreleri, son derece hızlı MHC II (IA b) molekülleri kullanılır. IPSCs çoğu CD4 + hücreleri içinde farklılık gösterir. Ancak, yüzey TCR ifade sonrasında, pek çok farklı ön T hücreleri a…

Divulgations

The authors have nothing to disclose.

Acknowledgements

Bu proje Sağlık (R01AI121180, R21AI109239 ve K18CA151798), American Diabetes Association National Institutes hibe altında, kısmen, finanse edildi (1-16-IBS-281) ve Sağlık Pennsylvania Bölümü (Tütün Yerleşim FONLAR) JS

Materials

C57BL/6j mice Jackson Laboratory 664
B6.129S7 Rag1tm1Mom/J Jackson Laboratory 2216
Anti-CD3 (2C11) antibody BD Pharmingen 553058
Anti-CD28 (37.51) antibody BD Pharmingen 553295
Anti-CD4 (GK1.5) antibody Biolegend 100417
Anti-CD8 (53–6.7) antibody Biolegend 100714
Anti-CD25 (3C7) antibody Biolegend 101912
Anti-TCR-β (H57597) antibody Biolegend 109220
Anti-IL10 Biolegend 505010
Anti-TGFβ Biolegend 141402
DMEM Invitrogen ABCD1234
α-MEM Invitrogen A10490-01
FBS Hyclone SH3007.01
Brefeldin A Sigma B7651
Polybrene Sigma 107689
Genejammer Integrated science 204130
ACK Lysis buffer Lonza 10-548E
mFlt-3L peprotech 250-31L
mIL-7 peprotech 217-17
Gelatin Sigma G9391
Paraformaldehyde Sigma P6148-500G Caution: Allergenic, Carcenogenic, Toxic
Permeabilization buffer Biolegend 421002
mBSA Sigma A7906
Ova albumin Avantor 0440-01
CFA Difco 2017014
Tailveiner restrainer Braintree scientific RTV 150-STD

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Citer Cet Article
Haque, M., Fino, K., Sandhu, P., Song, J. Development of Stem Cell-derived Antigen-specific Regulatory T Cells Against Autoimmunity. J. Vis. Exp. (117), e54720, doi:10.3791/54720 (2016).

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