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亮氨酸对κ-酪蛋白合成的影响及相关信号通路的研究 被引量:9

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摘要 本研究旨在探讨其他氨基酸缺乏条件下补充亮氨酸对奶牛乳腺上皮细胞κ-酪蛋白基因表达和蛋白合成以及细胞增殖的影响,并从mRNA水平探究mTOR信号通路介导的蛋白质合成的重要性。处理组1在对照组(稀释100倍的培养基)的基础上补充亮氨酸,处理组2在处理组1的基础上添加mTOR信号通路上游抑制剂,分别采用RT-qPCR技术和ELISA法测定基因的相对表达量和蛋白合成量,CCK-8法测定细胞增殖。结果表明:亮氨酸显著促进了κ-酪蛋白基因表达和蛋白合成(P<0.05),而添加抑制剂极显著降低了这种作用(P<0.01);各处理对蛋白质合成信号通路相关基因mTOR、S6K1、4EBP1、eIF4E、eEF2相对表达量均有一定影响;抑制剂能显著抑制细胞增殖(P<0.05)。结果提示,补充亮氨酸能显著促进κ-酪蛋白的合成,这可能与mTOR信号通路介导蛋白质合成有关,此外,mTOR信号通路也可调控奶牛乳腺上皮细胞的增殖。
出处 《中国畜牧杂志》 CAS 北大核心 2013年第9期38-41,共4页 Chinese Journal of Animal Science
基金 国家重点基础研究发展计划(973计划)(2011CB100803) 江苏高校优势学科建设工程资助项目
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