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压力会改变青春期雄性金黄仓鼠下丘脑的基因表达。

Stress alters hypothalamic gene expression in adolescent male Golden hamsters.

作者信息

Moran Kevin M, Milewski Tyler M, Curley James P, Delville Yvon

机构信息

Joint Graduate Program in Toxicology, Rutgers, The State University of New Jersey, Piscataway, New Jersey, USA.

Psychology Department, The University of Texas at Austin, Austin, Texas, USA.

出版信息

J Neuroendocrinol. 2025 Sep;37(9):e70067. doi: 10.1111/jne.70067. Epub 2025 Jul 14.

Abstract

In Golden hamsters (Mesocricetus auratus), a two-week exposure to chronic social stress in adolescence causes acceleration of agonistic behavior, enhanced adult aggression, impaired waiting impulsivity, and higher food intake, body fat, and long-term increased body weight. In adult rodents, stress is accompanied by widespread alterations in gene expression in the brain. As stress is a potent modulator of both gene expression and behavior, the present research investigated possible mechanistic-related transcriptomic changes in the lateral, dorsomedial, and arcuate nucleus of the hypothalamus caused by adolescent stress using RNA Tag-sequencing, as these areas are involved in the regulation of metabolic and motivated behaviors. In each region, there were approximately 250 genes with higher expression compared to controls and 250 genes with lower expression. Many of the most significantly affected genes have been associated with metabolism and sex hormone function. For example, in the lateral hypothalamus, melanocortin 3 receptor, growth hormone releasing factor, both involved in metabolic processes, and neuropeptide VF precursor, involved in growth hormone inhibitory hormone production, were among the most increased in expression in stressed subjects. In the dorsomedial hypothalamus, neuropeptide W, involved in feeding cessation, was significantly decreased in expression in stressed animals. Across both regions, G-protein coupled receptor 50, involved in thermoregulation, sleep, and sex-related mood disorders, was significantly altered, but in opposite directions. In the arcuate nucleus, a number of blood brain barrier- and inflammation-related genes were altered as well. Furthermore, there were consistent patterns of genetic ensembles identified through gene ontology analysis and weighted gene correlation network analysis that were altered across each region. Many of these involved roles in RNA processing, DNA methylation, myelination, and synaptic organization. These findings reinforce prior behavioral, hormonal, and metabolic changes observed in this developmental model, and help guide future directions of research related to the negative consequences of early life stress.

摘要

在金黄地鼠(Mesocricetus auratus)中,青春期为期两周的慢性社会应激暴露会导致攻击行为加速、成年后攻击性增强、等待冲动性受损,以及食物摄入量增加、体脂增加和长期体重上升。在成年啮齿动物中,应激伴随着大脑中基因表达的广泛改变。由于应激是基因表达和行为的有力调节因子,本研究使用RNA标签测序法,研究了青春期应激在下丘脑外侧核、背内侧核和弓状核中可能引起的与机制相关的转录组变化,因为这些区域参与代谢和动机行为的调节。在每个区域,与对照组相比,约有250个基因表达上调,250个基因表达下调。许多受影响最显著的基因都与代谢和性激素功能有关。例如,在下丘脑外侧核中,参与代谢过程的黑皮质素3受体、生长激素释放因子,以及参与生长抑素产生的神经肽VF前体,在应激动物中的表达增加最为明显。在背内侧下丘脑,参与进食停止的神经肽W在应激动物中的表达显著降低。在这两个区域中,参与体温调节、睡眠和与性相关情绪障碍的G蛋白偶联受体50均有显著改变,但方向相反。在弓状核中,一些与血脑屏障和炎症相关的基因也发生了改变。此外,通过基因本体分析和加权基因共表达网络分析确定的基因集合模式在每个区域都有一致的变化。其中许多涉及RNA加工、DNA甲基化、髓鞘形成和突触组织等作用。这些发现强化了在此发育模型中观察到的先前行为、激素和代谢变化,并有助于指导与早期生活应激负面影响相关的未来研究方向。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/27f3/12404909/6fc5d68dd072/JNE-37-e70067-g001.jpg

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