The circadian rhythm of adult emergence (aka eclosion) of the fruit fly Drosophila is a classic behavioural read-out that served in the first characterisation of the key features of circadian clocks and was also used for the identification of the first clock genes. Rhythmic eclosion requires the central clock in the brain, as well as a peripheral clock in the steroidogenic prothoracic gland. Here, we review recent findings on the timing and neuroendocrine coupling mechanisms of the two clocks.
View Article and Find Full Text PDFIn animals, circadian clocks impose a daily rhythmicity to many behaviors and physiological processes. At the molecular level, circadian rhythms are driven by intracellular transcriptional/translational feedback loops (TTFL). Interestingly, emerging evidence indicates that they can also be modulated by multiple signaling pathways.
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