Entwicklung von Stammzellen abgeleiteten Antigen-spezifische regulatorische T-Zellen gegen Autoimmunität
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
Autoimmunerkrankungen entstehen aufgrund der Verlust der immunologischen Selbsttoleranz. Regulatorische T-Zellen (Tregs) sind wichtige Vermittler von immunologischer Selbsttoleranz. Tregs repräsentieren etwa 5 – 10% der reifen CD4 + T – Zell – Subpopulation bei Mäusen und Menschen, mit etwa 1 bis 2% der Tregs im peripheren Blut zirkulieren. Induzierte pluripotenter Stammzellen (iPS) in funktionelle Treg unterschieden werden, die ein Potential für zellbasierte Therapie von Autoimmunerkrankungen eingesetzt werden. Hier präsentieren wir eine Methode Antigen (Ag) -spezifische Tregs von iPS – Zellen zu entwickeln (dh iPS-Tregs). Das Verfahren basiert auf den Transkriptionsfaktor FoxP3 enthält und eine Ag-spezifischen T-Zell-Rezeptor (TCR) in iPSCs und dann Notch Differenzierung auf Zellen OP9 Stromazellen exprimieren Liganden delta-like (DL) 1 und DL4. Folgende in vitro Differenzierung exprimieren die iPSC-Treg CD4, CD8, CD3, CD25, FoxP3 und Ag-spezifischen TCR und können Ag – Stimulation reagiert.Diese Methode wurde zur zellbasierte Therapie von Autoimmun Arthritis in einem Mausmodell erfolgreich angewendet. Adoptive Übertragung dieser Ag-spezifischen iPSC-Treg in Ag-induzierten Arthritis (AIA) -haltigen Mäusen hat die Fähigkeit, Gelenkentzündung und Schwellungen zu reduzieren und Knochenverlust zu verhindern.
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
In diesem Protokoll ist ein kritischer Schritt der in vitro Differenzierung von TCR / FoxP3 – Gen-Transduktion iPSCs. In vitro Notch – Signalweg induziert Entwicklung in Richtung der T – Zell – Abstammungslinie. Um iPSCs in CD4 + FoxP3 + Tregs unterscheiden, haben wir die OP9-DL1 / DL4 / IA b – Zellen, die hoch express MHC II (IA b) Moleküle. Die meisten der iPSCs differenzieren sich in CD4 + -Zellen. Doch nach der Oberfläche TCR-Expression, verl…
Divulgations
The authors have nothing to disclose.
Acknowledgements
Dieses Projekt wurde finanziert, zum Teil unter Zuschüsse aus den National Institutes of Health (R01AI121180, R21AI109239 und K18CA151798), der American Diabetes Association (1-16-IBS-281) und der Pennsylvania Department of Health (Tobacco Settlement Funds) zu 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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