Treatment of T1D via optimized expansion of antigen-specific Tregs induced by IL-2/anti-IL-2 monoclonal antibody complexes and peptide/MHC tetramers.

Abstract:

:Type 1 diabetes can be overcome by regulatory T cells (Treg) in NOD mice yet an efficient method to generate and maintain antigen-specific Treg is difficult to come by. Here, we devised a combination therapy of peptide/MHC tetramers and IL-2/anti-IL-2 monoclonal antibody complexes to generate antigen-specific Treg and maintain them over extended time periods. We first optimized treatment protocols conceived to obtain an improved islet-specific Treg/effector T cell ratio that led to the in vivo expansion and activation of these Treg as well as to an improved suppressor function. Optimized protocols were applied to treatment for testing diabetes prevention in NOD mice as well as in an accelerated T cell transfer model of T1D. The combined treatment led to robust protection against diabetes, and in the NOD model, to a close to complete prevention of insulitis. Treatment was accompanied with increased secretion of IL-10, detectable in total splenocytes and in Foxp3- CD4 T cells. Our data suggest that a dual protection mechanism takes place by the collaboration of Foxp3+ and Foxp3- regulatory cells. We conclude that antigen-specific Treg are an important target to improve current clinical interventions against this disease.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Izquierdo C,Ortiz AZ,Presa M,Malo S,Montoya A,Garabatos N,Mora C,Verdaguer J,Stratmann T

doi

10.1038/s41598-018-26161-6

subject

Has Abstract

pub_date

2018-05-25 00:00:00

pages

8106

issue

1

issn

2045-2322

pii

10.1038/s41598-018-26161-6

journal_volume

8

pub_type

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