油酸通过刺激GPR40-Gαq-PI3K/Akt-SREBP1-依赖脂肪酸摄入来促进牛奶脂肪合成
Min Tian1,2, Bing Zhang1,3,4, Haobin Li1,3,4
1Guangdong Provincial Key Laboratory of Animal Nutrition Control, College of Animal Science, South China Agricultural University, Guangzhou 510642, China.
Journal of agricultural and food chemistry
|February 17, 2026
概括
油酸通过激活GPR40信号通路来增加牛奶脂肪的产生,从而增加乳腺细胞中的脂肪酸吸收和甘油三合成.
科学领域:
- * 分子和细胞生物学
- * 脂质新陈代谢的发生
- * 哺乳动物哺乳生理学
背景情况:
- * 牛奶脂肪是能量和必需脂肪酸的重要来源.
- * 特定脂肪酸影响牛奶脂肪合成的精确机制尚未完全理解.
- * 油酸是一种常见的长链脂肪酸 (LCFA),在脂质代谢中起作用.
研究的目的:
- *阐明油酸在哺乳动物乳脂生产中的作用.
- * 为了确定油脂酸调节甘油三合成的分子机制.
- * 为了研究油酸诱导的脂质生成中GPR40介导的信号通路.
主要方法:
- *使用乳腺上皮细胞接受油酸治疗的体外研究.
- *siRNA介导的淘汰和药物抑制信号通路组件.
- * 在哺乳小鼠的体内研究中,给予GPR40抗剂.
- *对基因和蛋白质表达,脂肪酸摄入量和甘油三积累的分析.
主要成果:
- * 油酸上调的固醇调节元素结合蛋白1 (SREBP1) 和脂肪酸载体 (CD36,FATP4,FABP4).
- * 油酸通过GPR40-Gαq-PI3K/Akt-SREBP1信号轴增强脂肪酸的吸收和甘油三的合成.
- *体内GPR40对抗作用降低了牛奶脂肪含量和乳腺脂沉积,证实了该途径的相关性.
结论:
- *油酸显著增强乳腺上皮细胞中的牛奶脂肪合成.
- * GPR40-Gαq-PI3K/Akt-SREBP1级联是调解油酸作用的关键途径.
- *研究结果提供了对饮食脂肪酸调节乳脂产生的分子洞察力.
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