数字农科院2.0

Androgen Receptor Expression Governs the Seasonal Inhibition of Testicular Development and Subsequent Recovery in Rattus norvegicus caraco

文献类型： 外文期刊

作者： Yaqi Ying;Lewen Wang;Dawei Wang;Ning Li;Ying Song;Xiaohui Liu

作者机构：

关键词： Ar;brown rat;regulation;seasonal reproduction;testicular recovery

期刊名称： Biology

ISSN： 2079-7737

年卷期： 2025 年 14 卷 2 期

页码：

收录情况： SCIE（2025版）

摘要： Commonly in seasonal breeding animals, testicular development is inhibited prior to Sertoli cell maturation when environmental conditions become unfavorable, with recovery occurring once conditions improve. However, the precise molecular mechanisms governing this process remain unclear. We investigated the role of androgen receptor (AR) in the seasonal regulation of testicular development in a wild population of Rattus norvegicus caraco, a subspecies of brown rats in Northeast China residing in high-latitude regions, known for its seasonal reproductive patterns. Our results revealed a significant increase in Ar mRNA expression in wild rats with small testes less than 0.2 g and body weights ranging between 80 and 100 g during the nonbreeding season. Further examinations of Ar expression in the testicular development of R. n. caraco in the laboratory under different day lengths and temperatures that simulating breeding and nonbreeding seasons suggest that the maturation of Sertoli cells depends on the upregulation of Ar expression around a testis weight of 0.07–0.18 g, regardless of age and conditions, synchronously accompanying the initiation of the meiotic phase. When Ar expression was suppressed, testicular development was impeded around the stage of Sertoli cell maturation, resulting in decreased spermatogenesis and hindered growth in testis weight. Our findings elucidate how animals control the seasonal inhibition and subsequent recovery of testicular development by regulating Ar expression in R. n. caraco.

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