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作 者:孙燕[1] 王鲜忠[1] 吴建云[1] 白汝岚[1] 张家骅[1]
机构地区:[1]西南大学牧草与草食家畜重点实验室
出 处:《畜牧兽医学报》2008年第8期1040-1044,共5页ACTA VETERINARIA ET ZOOTECHNICA SINICA
基 金:教育部博士学科点专项基金(20040625004);重庆市教委项目(KJ060314)
摘 要:以体外培养的仔猪睾丸支持细胞为研究对象,研究了FSH对GDNF蛋白的调节及其信号传导机制。结果显示:(1)外源性FSH以浓度和时间依赖性促进GDNF蛋白表达:FSH浓度为50ng/mL、作用1h时,GDNF水平达到最高;(2)用FSH(50ng/mL)或dbcAMP(100μmol/L)处理支持细胞,可迅速激活MEK激酶,随FSH刺激时间的延长,ERK1/2活性逐渐升高(0~2h);(3)MEK1/2的抑制剂U0126可显著抑制FSH对GDNF的激活作用。结果表明,FSH在诱导GDNF蛋白表达的过程中,通过cAMP-PKA-ERK1/2级联通路,促进GDNF基因的表达。Primary piglet sertoli cell (SC) were used to study the effects of FSH on regulating Glial cell line-derived neurotrophic factor (GDNF) expression. The results showed that: (1) The FSH-stimulated GDNF expression in the cultured SC was time- and concentration-dependent., the level of GDNF protein reached its highest when FSH (50 ng/mL) stimulated lh. (2) FSH(50 ng/mL)or dbcAMP(100μmol/L)could active ERK1/2 prominently along with a maximum stimulation at 2 h; (3) U0126 (MEK1/2 inhibitor) could apparently inhibited the activing effect of FSH on GDNF. These results suggested that, by activing the cAMP-PKA-ERK1/2 and promting the transcription of GDNF gene, FSH stimulated the expression of GDNF of sertoli cells.
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