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Piezo1/2 调节了普通鱼的胃素分泌
Xiaoli Yao1,2,3, Qi Zhang1,2,3, Temesgen Tola Geletu4
1Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai, 201306, China.
Fish physiology and biochemistry
|May 15, 2025
概括
这项研究表明,普通鱼胃中的Piezo1/2通道被压力激活,增加了对消化至关重要的pepsinogen分泌. 这一发现增强了我们对食肉鱼胃调节的理解.
科学领域:
- 身体生理学 身体生理学
- 胃肠病学 胃肠病学
- 海洋生物学 海洋生物学
背景情况:
- 素对于食肉鱼的胃消化至关重要.
- 胃皮埃佐通道是响应压力的机械传感器,在哺乳动物中得到了很好的研究,但在鱼类中却未被充分探索.
- 了解鱼的胃生理学和调节机制对于水产养殖和渔业科学至关重要.
研究的目的:
- 为了研究未成年普通鱼胃消化的生理特征.
- 探索素和皮埃佐通道分泌的调节机制.
- 确定胃内压力在激活皮埃佐通道和影响素表达中的作用.
主要方法:
- 年轻的普通鱼被食活,并随着时间的推移分析了胃的含量.
- 开发了一个数学模型 (平方根模型) 来描述胃排空和压力变化.
- 在养和饮水条件下检查了Piezo1/2和pepsinogens (PGA,PGC) 的表达模式.
主要成果:
- 胃内容重量随着时间的推移而下降,在养后6小时 (hpf) 后显著减少.
- 皮埃佐1/2表达和素含量显著增加,在正常消化过程中达到6hpf的峰值.
- 在水中,Piezo1/2和pepsinogen水平急剧上升,在1-2小时达到峰值,表明压力诱导的激活.
结论:
- 胃内压力激活了幼鱼中的Piezo1/2通道.
- 活性Piezo1/2上调调节素的表达,增强胃消化.
- 这项研究揭示了一种新型的机械传感途径,可以调节食肉鱼的胃功能.
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