在自然鱼种群中,甲状腺刺激激素受体的功能突变发生在与引起人类疾病的突变相同的地方
Jun Kitano1,2, Mana Sato3, Hiyu Kanbe3,4
1Ecological Genetics Laboratory, National Institute of Genetics, Yata 1111, Mishima, Shizuoka, 411-8540, Japan. jkitano@nig.ac.jp.
BMC ecology and evolution
|October 1, 2025
概括
人类疾病突变可以揭示野生鱼种群的功能遗传变化. 研究甲状腺刺激激素受体2 (Tshr2) 突变的粘性背脊提供了洞察力甲状腺激素信号的自然变化.
科学领域:
- 进化生物学是进化的生物学.
- 遗传学 是一个遗传学.
- 内分泌学 在内分泌学.
背景情况:
- 甲状腺激素对于新陈代谢,繁殖和变形至关重要.
- 甲状腺激素信号的变化存在于种群和物种之间,但引起突变通常是未知的.
- 这项研究探讨了使用人类甲状腺疾病基因信息来识别自然鱼种群中的功能突变.
研究的目的:
- 为了调查人类甲状腺疾病突变是否可以帮助识别自然鱼种群中的功能突变.
- 为了确定日本鱼种群是否具有与导致人类甲状腺疾病的基因相似的位点突变.
- 用哺乳动物细胞系来评估这些突变的功能影响.
主要方法:
- 比较基因组学:确定了人类甲状腺疾病基因和粘性背脊基因之间的正统突变部位.
- 功能性测试:利用异质哺乳动物细胞系来测试粘性背脊突变对受体功能的影响.
- 分子分析:检查了TSHR1和TSHR2在stickleback中的表达模式.
主要成果:
- 几种鱼种群在甲状腺刺激激素受体2 (Tshr2) 基因中具有非同义突变.
- TSHR2对TSH2有反应,但对TSH1没有反应,人类疾病相关部位的突变改变了TSHR2的功能 (功能丧失和功能增加).
- TSHR1和TSHR2分别在喉和大脑中显示出不同的表达模式,表明了亚功能化.
结论:
- 自然的鱼种群在与人类引起疾病的突变同源的部位的甲状腺激素信号基因中存在功能突变.
- 人类致病突变是识别野生动物群体功能突变的有价值指标.
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