Cancer metastasis, a process that primary tumor cells disseminate to secondary organs, is the most lethal and least effectively treated characteristic of human cancers. Kisspeptins are proteins encoded by the KISS1 ge...Cancer metastasis, a process that primary tumor cells disseminate to secondary organs, is the most lethal and least effectively treated characteristic of human cancers. Kisspeptins are proteins encoded by the KISS1 gene that was originally described as a melanoma metastasis suppressor gene. Then, Kisspeptins were discovered as the natural ligands of the G-protein-coupled receptor 54(GPR54) that is also called KISS1R. The KISS1/KISS1R signaling is essential to control Gn RH secretion during puberty and to establish mammalian reproductive function through the hypothalamic-pituitary-gonadal(HPG) axis. Although KISS1primarily plays a suppressive role in the metastasis progression in several cancer types, emerging evidence indicates that the physiological effect of KISS1/KISS1R in cancer metastasis is tissue context-dependent and still controversial. Here, we will discuss the epigenetic mechanism involved in the regulation of KISS1 gene expression, the context-dependent role of KISS1/KISS1R, prometastasis/anti-metastasis signaling pathways of KISS1/KISS1R, and the perspective anticancer therapeutics via targeting KISS1/KISS1R.展开更多
目的:通过构建营养性肥胖雄性大鼠的模型,探讨下丘脑弓状核kisspeptin/kiss1r系统和促性腺激素释放激素(GnRH)的表达和作用,以及对下丘脑-垂体-睾丸轴(HPT)的影响。方法:孕14 d SD大鼠,其后代随机分为正常组和高能饲料组,构建营养性肥...目的:通过构建营养性肥胖雄性大鼠的模型,探讨下丘脑弓状核kisspeptin/kiss1r系统和促性腺激素释放激素(GnRH)的表达和作用,以及对下丘脑-垂体-睾丸轴(HPT)的影响。方法:孕14 d SD大鼠,其后代随机分为正常组和高能饲料组,构建营养性肥胖模型。将肥胖大鼠进一步分为对照组和实验组,实验组侧脑室注入kisspeptin。记录体重参数和内分泌激素的改变;免疫组化和Western印迹检测各组大鼠下丘脑弓状核中瘦素受体(LepR)、kisspeptin、kiss1r和GnRH的蛋白表达。qRT-PCR检测各组大鼠下丘脑弓状核GnRH mRNA的表达。结果:成功构建营养性肥胖大鼠,体重参数和内分泌激素改变明显。相比较正常组,对照组大鼠弓状核LepR、kisspeptin和GnRH表达减少,侧脑室注入kisspeptin后,实验组大鼠弓状核GnRH显著增加,血清LH和T水平显著升高,未见LepR和kiss1r的改变。结论:中枢注入kisspeptin可以显著改善由营养性肥胖引起的GnRH低表达,纠正HPT轴功能失调,进而改善生殖功能。展开更多
文摘Cancer metastasis, a process that primary tumor cells disseminate to secondary organs, is the most lethal and least effectively treated characteristic of human cancers. Kisspeptins are proteins encoded by the KISS1 gene that was originally described as a melanoma metastasis suppressor gene. Then, Kisspeptins were discovered as the natural ligands of the G-protein-coupled receptor 54(GPR54) that is also called KISS1R. The KISS1/KISS1R signaling is essential to control Gn RH secretion during puberty and to establish mammalian reproductive function through the hypothalamic-pituitary-gonadal(HPG) axis. Although KISS1primarily plays a suppressive role in the metastasis progression in several cancer types, emerging evidence indicates that the physiological effect of KISS1/KISS1R in cancer metastasis is tissue context-dependent and still controversial. Here, we will discuss the epigenetic mechanism involved in the regulation of KISS1 gene expression, the context-dependent role of KISS1/KISS1R, prometastasis/anti-metastasis signaling pathways of KISS1/KISS1R, and the perspective anticancer therapeutics via targeting KISS1/KISS1R.
文摘目的:通过构建营养性肥胖雄性大鼠的模型,探讨下丘脑弓状核kisspeptin/kiss1r系统和促性腺激素释放激素(GnRH)的表达和作用,以及对下丘脑-垂体-睾丸轴(HPT)的影响。方法:孕14 d SD大鼠,其后代随机分为正常组和高能饲料组,构建营养性肥胖模型。将肥胖大鼠进一步分为对照组和实验组,实验组侧脑室注入kisspeptin。记录体重参数和内分泌激素的改变;免疫组化和Western印迹检测各组大鼠下丘脑弓状核中瘦素受体(LepR)、kisspeptin、kiss1r和GnRH的蛋白表达。qRT-PCR检测各组大鼠下丘脑弓状核GnRH mRNA的表达。结果:成功构建营养性肥胖大鼠,体重参数和内分泌激素改变明显。相比较正常组,对照组大鼠弓状核LepR、kisspeptin和GnRH表达减少,侧脑室注入kisspeptin后,实验组大鼠弓状核GnRH显著增加,血清LH和T水平显著升高,未见LepR和kiss1r的改变。结论:中枢注入kisspeptin可以显著改善由营养性肥胖引起的GnRH低表达,纠正HPT轴功能失调,进而改善生殖功能。
