在不同的冬季现象类型的德容加利亚仓鼠 (Phodopus sungorus) 下丘脑甲状腺激素系统的活动季节性变化
Anna S Przybylska-Piech1, Victoria Diedrich2, Annika Herwig2
1Department of Vertebrate Zoology and Ecology, Nicolaus Copernicus University in Toruń, Toruń, Poland.
PloS one
|October 25, 2024
概括
德加利亚仓鼠表现出各种冬季适应性,因为它们对短暂的日光有不同的反应. 甲状腺激素系统和下垂体的tanycyte变化与这些季节性表型变化有关.
科学领域:
- 内分泌学 在内分泌学.
- 神经科学是一个神经科学.
- 动物生理学 动物生理学
背景情况:
- 德容加利亚仓鼠 (Phodopus sungorus) 在冬季适应过程中表现出显著的变化,尽管它是季节性适应的模型.
- 这个冬季表型多态的背后的机制,包括体质的差异,性腺回归,毛皮颜色和每日,仍然不清楚.
研究的目的:
- 研究甲状腺体下丘脑激素系统和tanycyte结构在观察到的冬季表型的多态性在加利亚子的作用.
- 为了比较与甲状腺激素调节相关的基因表达和暴露于短时间和长时间光周期的仓鼠之间的tanycyte形态.
主要方法:
- 在40只仓鼠中,对氨酸二氧化酶2和3的基因表达分析,单碳酸盐运输体8的基因表达分析,甲状腺激素释放激素和索马托斯塔丁.
- 在不同的光周期条件下,对30只仓鼠的下丘脑中免疫标记的tanycyte过程的量化.
- 根据它们对短光周期的反应,将子分为非响应型,部分响应型和完全响应型的表型.
主要成果:
- 与较长的光周期相比,短光周期适应导致二氧化酶2和体静止素的表达减少,二氧化酶3的表达增加,以及较少的tanycyte过程.
- 虽然不同的表型在基因表达上没有差异,但较高的光响应指数与较低的二氧化酶2和较高的二氧化酶3表达相关.
- 部分和完全响应者比不响应者具有较少的tanycyte过程,tanycyte过程数与光响应指数相关. 女性表现出比男性更多的tanycyte过程.
结论:
- 甲状腺荷尔蒙在加利亚仓鼠的季节性反应中起着至关重要的作用.
- 在加利亚仓鼠中观察到的冬季表型的范围反映在他们的神经内分泌调节中.
- 需要进一步的研究,以充分阐明这种物种冬季表型多态化背后的神经内分泌机制.
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