The circadian clock interacts with metabolic physiology to influence reproductive fitness.

The circadian clock interacts with metabolic physiology to influence reproductive fitness.
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DOI:
10.1016/j.cmet.2011.05.001
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发表时间:
2011-06-08
期刊:
影响因子:
29
通讯作者:
Sehgal A
Sehgal A
中科院分区:
生物学1区
文献类型:
--
作者:
Xu K;DiAngelo JR;Hughes ME;Hogenesch JB;Sehgal A

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昼夜节律由中央和外周时钟的同步系统来调节。在这里,我们展示了果蝇脂肪体中的时钟驱动涉及新陈代谢、解毒、免疫反应和类固醇激素调节的基因的节律性表达。这些基因中的一些甚至在脂肪生物钟被打乱的情况下也会循环,这表明它们受到外部因素的调节。食物是一种重要的刺激,因为将食物供应限制在每天六小时的间隔内,会促使脂肪身体中的基因有节奏地表达。将食物限制在一天中摄入量通常较低的时间段会使内部节律失去同步性,因为它改变了脂肪体内有节奏的基因表达的阶段,而不会影响大脑时钟。维持在这种模式下的苍蝇比那些在正常时间被限制在食物中的苍蝇产生的卵更少。这些数据表明,由异常的摄食模式引起的内源性节律的去同步化,影响了生殖的适合性。
Circadian rhythms are regulated by a synchronized system of central and peripheral clocks. Here we show that a clock in the Drosophila fat body drives rhythmic expression of genes involved in metabolism, detoxification, the immune response and steroid hormone regulation. Some of these genes cycle even when the fat body clock is disrupted indicating they are regulated by exogenous factors. Food is an important stimulus as limiting food availability to a six-hour interval each day drives rhythmic expression of genes in the fat body. Restricting food to a time of day when consumption is typically low desynchronizes internal rhythms because it alters the phase of rhythmic gene expression in the fat body without affecting the brain clock. Flies maintained on this paradigm produce fewer eggs than those restricted to food at the normal time. These data suggest that desynchrony of endogenous rhythms, caused by aberrant feeding patterns, affects reproductive fitness.
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