miR-196a通过向CDKN1B促进乳腺上皮细胞的增殖
Guanhe Chen1, Wenqiang Sun1, Yuchao Li1
1College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China.
Animals : an open access journal from MDPI
|December 9, 2023
概括
热压对奶牛产生负面影响. 微RNA-196a (miR-196a) 通过抑制CDKN1B,促进细胞增殖,保护牛乳腺上皮细胞 (BMEC) 免受热应激.
科学领域:
- 动物科学动物科学
- 分子生物学分子生物学
- 环境压力生物学
背景情况:
- 全球变暖给乳制品行业带来了重大挑战,主要是通过热应激 (HS).
- 微RNA-196a (miR-196a) 与细胞对压力的反应有关,但其在HS下牛乳腺上皮细胞 (BMEC) 中的作用尚不清楚.
研究的目的:
- 在BMEC中调查miR-196a对热应激诱导的增殖停止的保护作用.
- 阐明miR-196a在热应激下BMEC中作用的潜在分子机制.
主要方法:
- 为BMECs开发热应力模型的开发.
- 过度表达miR-196a和细胞增殖的评估.
- RNA测序 (RNA-seq) 用于识别差异表达基因 (DEG).
- 使用RT-qPCR,西式抹杀和双露西法酶记者分析验证基因标的验证.
主要成果:
- 热应激显著抑制了BMEC的扩散,并降低了miR-196a的表达.
- 过度表达miR-196a减轻了热应激诱导的增殖抑制.
- 通过RNA-seq识别了105个DEG,其中一些与热生成和增殖途径有关.
- 证实CDKN1B是miR-196a.的直接标基因.
结论:
- 在热应激条件下,miR-196a促进BMEC的扩散.
- miR-196a/CDKN1B轴是参与缓解BMEC热应激诱导的增殖停止的关键途径.
- 这表明一个潜在的治疗目标,以改善乳牛的热应激弹性.
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