Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1902517 | Ageing Research Reviews | 2008 | 15 Pages |
Abstract
Periodic biological variations reflect interactions among molecules and cells, or even organisms. The Dictyostelium cAMP oscillatory circuit is a highly robust example. cAMP oscillations in Dictyostelium arise intracellularly by a complex interplay of activating and inhibiting pathways, are transmitted extracellularly, and synchronize an entire local population. Once established, cAMP signal-relay persists stably for hours. On a two-dimensional surface, >100,000 cells may form a single coordinated territory. In suspension culture, >1010 cells can oscillate in harmony. This review focuses on molecular mechanisms that cyclically activate and attenuate signal propagation and on chemotactic responses to oscillatory wave progression.
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Biochemistry, Genetics and Molecular Biology
Ageing
Authors
Vanessa C. McMains, Xin-Hua Liao, Alan R. Kimmel,