Otoimmünite karşı Kök Hücre türetilmiş antijen-özgü düzenleyici T hücrelerinin gelişimini
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
Representative Results
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…
Divulgazioni
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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