alexa Human islets of Langerhans express Fas ligand and undergo apoptosis in response to interleukin-1beta and Fas ligation.
Biochemistry

Biochemistry

Biochemistry & Physiology: Open Access

Author(s): Loweth AC, Williams GT, James RF, Scarpello JH, Morgan NG

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Abstract IDDM results from a progressive loss of pancreatic beta-cells that, in humans, may be triggered by a combination of genetic and environmental factors. Recently, attention has been focused on the hypothesis that the loss of beta-cells is initiated by inappropriate induction of apoptosis. We now demonstrate that human islets of Langerhans undergo apoptosis upon exposure to interleukin-1beta. The cytokine also sharply increases the number of cells that enter apoptosis on treatment with a stimulatory anti-Fas antibody. Western blotting and immunocytochemistry clearly show for the first time that human pancreatic beta-cells normally express Fas ligand. The results suggest that human islet cells are primed to undergo apoptosis by interleukin-1beta and that this involves the close association between cell-surface Fas and its ligand.
This article was published in Diabetes and referenced in Biochemistry & Physiology: Open Access

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