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http://www.jci.org/articles/view/640951 M$ k. S. r& c* d' S# I
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The role of aging upon β cell turnover
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& s  h$ P3 {9 DJake A. Kushner
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Published March 1, 2013+ U7 R3 }# Q( n/ h* O0 Y8 s
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Preservation and regeneration of β cell endocrine function is a long-sought goal in diabetes research. Defective insulin secretion from β cells underlies both type 1 and type 2 diabetes, thus fueling considerable interest in molecules capable of rebuilding β cell secretion capacity. Though early work in rodents suggested that regeneration might be possible, recent studies have revealed that aging powerfully restricts cell cycle entry of β cells, which may limit regeneration capacity. Consequently, aging has emerged as an enigmatic challenge that might limit β cell regeneration therapies. This Review summarizes recent data regarding the role of aging in β cell regeneration and proposes models explaining these phenomena.

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