期刊
BIOLOGICAL REVIEWS
卷 88, 期 4, 页码 944-954出版社
WILEY
DOI: 10.1111/brv.12033
关键词
body size; critical weight; metamorphosis; PTTH; ecdysone; brain-independent moulting; insulin; TOR
类别
资金
- Direct For Biological Sciences
- Division Of Integrative Organismal Systems [0744952, 1121065] Funding Source: National Science Foundation
Body size determination requires a mechanism for sensing size and a mechanism for linking size information to the termination of growth. Although the hormonal mechanisms that terminate growth are well elucidated, the mechanisms by which a body senses its own size are only partially understood; most of this understanding has come from the study of the mechanisms that control insect moulting and metamorphosis. We first review and discuss advances in our understanding of the physiological mechanisms by which insect larvae sense their size. Second, we present new findings on how larvae in which the size-sensing mechanism has been disrupted eventually terminate growth (in a size-independent manner). We synthesize recent insights into the genetic and molecular mechanisms of ecdysteroid regulation in Drosophila melanogaster with developmental physiology findings in Manduca sexta, paving the way for an integrated understanding of the mechanisms of body size regulation.
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