alexa IFN-gamma affects homing of diabetogenic T cells.
Diabetes & Endocrinology

Diabetes & Endocrinology

Journal of Diabetes & Metabolism

Author(s): Savinov AY, Wong FS, Chervonsky AV

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Abstract IFN-gamma is a cytokine with pleiotropic functions that participates in immune and autoimmune responses. The lack of IFN-gamma is known to delay the development of autoimmune diabetes in nonobese diabetic (NOD) mice. Splenocytes from diabetic NOD and IFN-gamma knockout (KO) NOD mice transfer diabetes into NOD recipients equally well. However, adoptive transfer of diabetogenic T cells from NOD mice into NOD.IFN-gamma-KO or NOD mice lacking beta-chain of IFN-gamma receptor (NOD.IFN-gammaRbeta-KO) appeared to be much less efficient. We found that IFN-gamma influences the ability of diabetogenic cells to penetrate pancreatic islets. Tracing in vivo of insulin-specific CD8+ T cells has shown that homing of these cells to the islets of Langerhans was affected by the lack of IFN-gamma. While adhesion of insulin-specific CD8+ cells to microvasculature was normal, the diapedesis was significantly impaired. This effect was reversible by treatment of the animals with rIFN-gamma. Thus, IFN-gamma may, among other effects, influence immune and autoimmune responses by supporting the homing of activated T cells.
This article was published in J Immunol and referenced in Journal of Diabetes & Metabolism

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