Department of Entomology, College of Agriculture, Food and Environment, University of Kentucky, Lexington, KY, 40546, USA.
Faculty of Forestry and Wood Sciences, EXTEMIT-K, Czech University of Life Sciences, Kamýcká 1176, Prague 6, 165 21, Suchdol, Czech Republic.
BMC Genomics. 2018 Dec 14;19(1):934. doi: 10.1186/s12864-018-5323-4.
Epigenetic modifications including DNA methylation and post-translational modifications of histones are known to regulate gene expression. Antagonistic activities of histone acetyltransferases (HATs) and histone deacetylases (HDACs) mediate transcriptional reprogramming during insect development as shown in Drosophila melanogaster and other insects. Juvenile hormones (JH) play vital roles in the regulation of growth, development, metamorphosis, reproduction and other physiological processes. However, our current understanding of epigenetic regulation of JH action is still limited. Hence, we studied the role of CREB binding protein (CBP, contains HAT domain) and Trichostatin A (TSA, HDAC inhibitor) on JH action.
Exposure of Tribolium castaneum cells (TcA cells) to JH or TSA caused an increase in expression of Kr-h1 (a known JH-response gene) and 31 or 698 other genes respectively. Knockdown of the gene coding for CBP caused a decrease in the expression of 456 genes including Kr-h1. Interestingly, the expression of several genes coding for transcription factors, nuclear receptors, P450 and fatty acid synthase family members that are known to mediate JH action were affected by CBP knockdown or TSA treatment.
These data suggest that acetylation and deacetylation mediated by HATs and HDACs play an important role in JH action.
已知表观遗传修饰(包括 DNA 甲基化和组蛋白的翻译后修饰)可调节基因表达。组蛋白乙酰转移酶(HATs)和组蛋白去乙酰化酶(HDACs)的拮抗活性介导了果蝇和其他昆虫发育过程中的转录重编程。保幼激素(JH)在生长、发育、变态、生殖和其他生理过程的调控中起着至关重要的作用。然而,我们目前对 JH 作用的表观遗传调控的理解仍然有限。因此,我们研究了 CREB 结合蛋白(CBP,含有 HAT 结构域)和 Trichostatin A(TSA,HDAC 抑制剂)对 JH 作用的影响。
暴露于褐飞虱细胞(TcA 细胞)的 JH 或 TSA 分别导致 Kr-h1(已知的 JH 反应基因)和 31 或 698 个其他基因的表达增加。编码 CBP 的基因敲低导致包括 Kr-h1 在内的 456 个基因的表达减少。有趣的是,几个已知介导 JH 作用的转录因子、核受体、P450 和脂肪酸合酶家族成员的基因的表达受到 CBP 敲低或 TSA 处理的影响。
这些数据表明,HATs 和 HDACs 介导的乙酰化和去乙酰化在 JH 作用中起着重要作用。