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Acceleration of type 1 diabetes mellitus in proinsulin 2–deficient NOD mice

Open access
Thébault-Baumont, Karine, Dubois-Laforgue, Danielle, Krief, Patricia, Briand, Jean-Paul, Halbout, Philippe, Vallon-Geoffroy, Karine, Morin, Joëlle, Laloux, Véronique, Lehuen, Agnès, Carel, Jean-Claude, Jami, Jacques, Muller, Sylviane, Boitard, Christian·2003·Journal of Clinical Investigation

Abstract

Accumulating evidence favors a role for proinsulin as a key autoantigen in diabetes. In the mouse, two proinsulin isoforms coexist. Most studies point to proinsulin 2 as the major isoform recognized by T cells in the NOD mouse. We studied mice in which a null proinsulin 2 mutation was transferred from proinsulin 2-deficient 129 mice onto the NOD background along with 16 genetic markers (including I-A(g7) MHC molecule) associated with diabetes. Intercross mice from the fourth backcross generation showed that proinsulin 2(-/-) mice develop accelerated insulitis and diabetes. The high prevalence of anti-insulin autoantibodies in proinsulin 2(-/-) mice indicates that diabetes acceleration relates to altered recognition of proinsulin. The prevalence of anti-glutamic acid decarboxylase autoantibodies and of sialitis is not increased in proinsulin 2(-/-) mice. We give evidence that proinsulin 2 expression leads to silencing of T cells specific for an epitope shared by proinsulin 1 and proinsulin 2. In the human, alleles located in the VNTR region flanking the insulin gene control beta cell response to glucose and proinsulin expression in the thymus and are key determinants of diabetes susceptibility. Proinsulin 2(-/-) NOD mice provide a model to study the role of thymic expression of insulin in susceptibility to diabetes.

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Metadata

Authors
Thébault-Baumont, K., Dubois-Laforgue, D., Krief, P., Briand, J.-P., Halbout, P., Vallon-Geoffroy, K., Morin, J., Laloux, V., Lehuen, A., Carel, J.-C., Jami, J., Muller, S., & Boitard, C.
Venue
Journal of Clinical Investigation
Published
2003-03-15
Volume
111
Issue
6
Pages
851-857
ISSN
0021-9738 (ISSN-L)
OpenAlex
W2113799022
Cited by
224
References
4
FWCI
11.72
Type
journal article
Language
en
Open access
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CoChat. (2026). Citation check: Acceleration of type 1 diabetes mellitus in proinsulin 2–deficient NOD mice. https://app.cochat.ai/papers/10.1172/jci16584
The paper
Thébault-Baumont, K., Dubois-Laforgue, D., Krief, P., Briand, J.-P., Halbout, P., Vallon-Geoffroy, K., Morin, J., Laloux, V., Lehuen, A., Carel, J.-C., Jami, J., Muller, S., & Boitard, C. (2003). Acceleration of type 1 diabetes mellitus in proinsulin 2–deficient NOD mice. Journal of Clinical Investigation. https://doi.org/10.1172/jci16584

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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