Sex-biased gene expression in nutrient-sensing pathways.

Sex-biased gene expression in nutrient-sensing pathways.
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DOI:
10.1098/rspb.2022.2086
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发表时间:
2023-03-08
影响因子:
4.7
通讯作者:
Chapman, Tracey
Chapman, Tracey
中科院分区:
生物学1区
文献类型:
--
作者:
Bennett-Keki, Suzanne;Fowler, Emily K.;Folkes, Leighton;Moxon, Simon;Chapman, Tracey

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男性和女性之间的寿命差异存在于许多分类群中,至少部分可能是由对饮食的不同反应决定的。在这里,我们测试的假设,女性寿命的饮食敏感性较高介导的更高和更动态的表达,在女性的营养感应途径。我们首先重新分析了现有的RNA-seq数据,重点关注了17个具有寿命效应的营养传感基因。这表明,与假设一致,女性偏向的基因表达的主导模式,和性别偏向的基因之间有倾向于在交配后的女性偏见的损失。然后,我们直接测试了这17个营养感应基因在野生型三龄幼虫,一次交配的5日龄和16日龄的成人的表达。这证实了性别偏向的基因表达,并表明它通常在幼虫中不存在,但在成虫中频繁且稳定。总的来说,这些发现为女性寿命对饮食控制的敏感性提供了一个近似的解释。我们认为,男性和女性受到的对比选择压力产生了不同的营养需求和要求,导致寿命的性别差异。这强调了性别特异性饮食反应对健康影响的潜在重要性。
Differences in lifespan between males and females are found across many taxa and may be determined, at least in part, by differential responses to diet. Here we tested the hypothesis that the higher dietary sensitivity of female lifespan is mediated by higher and more dynamic expression in nutrient-sensing pathways in females. We first reanalysed existing RNA-seq data, focusing on 17 nutrient-sensing genes with reported lifespan effects. This revealed, consistent with the hypothesis, a dominant pattern of female-biased gene expression, and among sex-biased genes there tended to be a loss of female-bias after mating. We then tested directly the expression of these 17 nutrient-sensing genes in wild-type third instar larvae, once-mated 5- and 16-day-old adults. This confirmed sex-biased gene expression and showed that it was generally absent in larvae, but frequent and stable in adults. Overall, the findings suggest a proximate explanation for the sensitivity of female lifespan to dietary manipulations. We suggest that the contrasting selective pressures to which males and females are subject create differing nutritional demands and requirements, resulting in sex differences in lifespan. This underscores the potential importance of the health impacts of sex-specific dietary responses.
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