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首页> 外文期刊>Journal of Agricultural and Food Chemistry >miR-142-3p Regulates Milk Synthesis and Structure of Murine Mammary Glands via PRLR-Mediated Multiple Signaling Pathways
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miR-142-3p Regulates Milk Synthesis and Structure of Murine Mammary Glands via PRLR-Mediated Multiple Signaling Pathways

机译:MiR-142-3P通过PRLR介导的多信号传导途径调节牛奶合成和小鼠乳腺结构

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摘要

Murine mammary gland is an ideal model for studying the development and milk synthesis in dairy animals. MicroRNAs play an important role in milk synthesis and mammary gland development; however, the molecular mechanism of miR-142-3p continues to be poorly understood. Here, we knocked down miR-142-3p expression in vitro and vivo, increased the prolactin receptor expression and activated many downstream cellular proteins, such as mammalian target of rapamycin, sterol regulatory element-binding transcription factor 1, cyclin D1, and signal transducer and activator of transcription S. Additionally, miR-142-3p knockdown in mouse mammary gland epithelial cells increased proliferation but not viability, induced cell cycle progression, decreased apoptosis, and increased the expression of triglycerides and beta-casein. Moreover, miR-142-3p knockdown in murine mammary gland tissue in vivo affected the structure and function of the mammary gland, which showed an increased number of lobules and ducts and was more capable of producing milk. However, overexpression of miR-142-3p had the opposite effects. In summary, these data reveal that miR-142-3p regulates milk synthesis and the structure of murine mammary glands via PRLR-mediated multiple signaling pathways.
机译:小鼠乳腺是研究乳制品中的开发和牛奶合成的理想模型。 MicroRNA在牛奶合成和乳腺开发中起着重要作用;然而,MiR-142-3P的分子机制仍然明白很差。在这里,我们在体外和体内敲击miR-142-3p表达,增加了催乳素受体表达,并激活了许多下游细胞蛋白,例如哺乳动物催乳素,甾醇调节元素结合转录因子1,细胞周期蛋白d1和信号传感器和活化剂转录S.此外,小鼠乳腺上皮细胞的miR-142-3p敲低增加的增殖但不是活力,诱导细胞周期进展,降低细胞凋亡,增加了甘油三酯和β-酪蛋白的表达。此外,体内小鼠乳腺组织的miR-142-3p敲低影响了乳腺的结构和功能,其显示出增加数量的小叶片和管道,并且更能生产牛奶。然而,miR-142-3p的过表达具有相反的效果。总之,这些数据显示,MiR-142-3P通过PRLR介导的多信号传导途径调节牛奶合成和小鼠乳腺结构。

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