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Adoptive transfer of mRNA-Transfected T cells redirected against diabetogenic CD8 T cells can prevent diabetes

Fishman, Sigal, Lewis, Mark D., Siew, L. Khai, De Leenheer, Evy, Kakabadse, Dimitri, Davies, Joanne, Ziv, Doron, Margalit, Alon, Karin, Nathan, Gross, Gideon and Wong, F. Susan ORCID: 2017. Adoptive transfer of mRNA-Transfected T cells redirected against diabetogenic CD8 T cells can prevent diabetes. Molecular Therapy 25 (2) , pp. 456-464. 10.1016/j.ymthe.2016.12.007

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Chimeric major histocompatibility complex (MHC) molecules supplemented with T cell receptor (TCR) signaling motifs function as activation receptors and can redirect gene-modified T cells against pathogenic CD8 T cells. We have shown that β2 microglobulin (β2m) operates as a universal signaling component of MHC-I molecules when fused with the CD3-ζ chain. Linking the H-2Kd-binding insulin B chain peptide insulin B chain, amino acids 15–23 (InsB15–23) to the N terminus of β2m/CD3-ζ, redirected polyclonal CD8 T cells against pathogenic CD8 T cells in a peptide-specific manner in the non-obese diabetic (NOD) mouse. Here, we describe mRNA electroporation for delivering peptide/β2m/CD3-ζ genes to a reporter T cell line and purified primary mouse CD8 T cells. The peptide/β2m/CD3-ζ products paired with endogenous MHC-I chains and transmitted strong activation signals upon MHC-I cross-linking. The reporter T cell line transfected with InsB15–23/β2m/CD3-ζ mRNA was activated by an InsB15–23-H-2Kd-specific CD8 T cell hybrid only when the transfected T cells expressed H-2Kd. Primary NOD CD8 T cells expressing either InsB15–23/β2m/CD3-ζ or islet-specific glucose-6-phosphatase catalytic subunit-related protein, amino acids 206–214 (IGRP206–214)/β2m/CD3-ζ killed their respective autoreactive CD8 T cell targets in vitro. Furthermore, transfer of primary CD8 T cells transfected with InsB15–23/β2m/CD3-ζ mRNA significantly reduced insulitis and protected NOD mice from diabetes. Our results demonstrate that mRNA encoding chimeric MHC-I receptors can redirect effector CD8 against diabetogenic CD8 T cells, offering a new approach for the treatment of type 1 diabetes.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Publisher: Elsevier (Cell Press)
ISSN: 1525-0016
Date of First Compliant Deposit: 1 November 2018
Date of Acceptance: 5 December 2016
Last Modified: 09 May 2023 21:41

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