Department of Epidemiology, University of Michigan, Ann Arbor, MI, USA.
Department of Pediatrics, University of Michigan, Ann Arbor, MI, USA.
Mol Cell Endocrinol. 2023 Mar 15;564:111868. doi: 10.1016/j.mce.2023.111868. Epub 2023 Jan 26.
Inappropriate developmental exposure to steroids is linked to metabolic disorders. Prenatal testosterone excess or bisphenol A (BPA, an environmental estrogen mimic) leads to insulin resistance and adipocyte disruptions in female lambs. Adipocytes are key regulators of insulin sensitivity. Metabolic tissue-specific differences in insulin sensitivity coupled with adipose depot-specific changes in key mRNAs, were previously observed with prenatal steroid exposure. We hypothesized that depot-specific changes in the non-coding RNA (ncRNA) - regulators of gene expression would account for the direction of changes seen in mRNAs. Non-coding RNA (lncRNA, miRNA, snoRNA, snRNA) from various adipose depots of prenatal testosterone and BPA-treated animals were sequenced. Adipose depot-specific changes in the ncRNA that are consistent with the depot-specific mRNA expression in terms of directionality of changes and functional implications in insulin resistance, adipocyte differentiation and cardiac hypertrophy were found. Importantly, the adipose depot-specific ncRNA changes were model-specific and mutually exclusive, suggestive of different regulatory entry points in this regulation.
发育过程中类固醇的不适当暴露与代谢紊乱有关。胎儿期睾酮过多或双酚 A(BPA,一种环境雌激素模拟物)可导致雌性羔羊胰岛素抵抗和脂肪细胞破坏。脂肪细胞是胰岛素敏感性的关键调节因子。先前的研究表明,产前类固醇暴露会导致胰岛素敏感性的代谢组织特异性差异以及关键 mRNA 在脂肪组织中的特定变化。我们假设,表达基因的非编码 RNA(ncRNA)-调节因子的脂肪组织特异性变化将解释 mRNA 变化的方向。对来自产前睾酮和 BPA 处理动物不同脂肪组织的 ncRNA(lncRNA、miRNA、snoRNA、snRNA)进行了测序。发现 ncRNA 存在脂肪组织特异性变化,与 mRNA 的表达方向一致,在胰岛素抵抗、脂肪细胞分化和心肌肥厚方面具有功能意义。重要的是,脂肪组织特异性 ncRNA 变化具有模型特异性和相互排斥性,提示在这种调节中有不同的调控切入点。