...
首页> 外文期刊>Journal of Cellular Physiology >Regulation of plasminogen activators in human thyroid follicular cells and their relationship to differentiated function.
【24h】

Regulation of plasminogen activators in human thyroid follicular cells and their relationship to differentiated function.

机译:纤溶酶原激活物物在人的监管甲状腺滤泡细胞和他们的关系不同的函数。

获取原文
获取原文并翻译 | 示例
           

摘要

Human thyroid cells in culture take up and organify (125)I when cultured in TSH (acting through cAMP) and insulin. They also secrete urokinase (uPA) and tissue-type (tPA) plasminogen activators (5-100 IU/10(6)cells/day). TSH and insulin both decreased secreted PA activity (PAA), uPA and tPA protein and their mRNAs. Autocrine fibroblast growth factor increased secreted PAA and inhibited thyroid cell (125)I uptake. Epidermal growth factor (EGF) and the protein kinase C (PKC) activator, TPA significantly increased PAA and inhibited thyroid differentiated function, (TPA > EGF). For TPA, effects were rapid, increased PAA secretion and decreased (125)I uptake being seen at 4 h whereas for EGF, a 24 h incubation was required. qRT-PCR showed significantly increased mRNA expression of uPA with lesser effects on tPA. Aprotinin, which inhibits PAA, increased (125)I uptake but did not abrogate the effects of TPA and EGF. The MEKK inhibitor, PD98059 partially reversed the effects of EGF and TPA on PAA, and largely reversed the effects of EGF but not TPA on differentiated function. PKC inhibitors bisindoylmaleimide 1, and the specific PKCbeta inhibitor, LY379196 completely reversed the effects of TPA on (125)I uptake and PAA whereas EGF effects were unaffected. TPA inhibited follicle formation and this effect was blocked by LY379196 but not PD98059. We conclude that in thyroid cells, MAPK activation inversely correlates with (125)I uptake and directly correlates with PA expression, in contrast to the effects of cAMP. TPA effects on iodide metabolism, dissolution of follicles and uPA synthesis are mediated predominantly through PKCbeta whereas EGF exerts its effects through MAPK but not PKCbeta. J. Cell. Physiol. 212:643-654, 2007. (c) 2007 Wiley-Liss, Inc.
机译:人类甲状腺细胞在文化和organify(125)我在TSH培养(表演通过夏令营)和胰岛素。尿激酶(uPA)和组织类型(tPA)纤溶酶原。物活化剂(5 - 100 IU / 10(6)细胞/天)。胰岛素分泌减少PA活动(PAA), uPA和tPA蛋白质及其mrna。自分泌纤维母细胞生长因子增加分泌PAA和抑制甲状腺细胞(125)我吸收。蛋白激酶C (PKC)的激活,TPA大大增加了PAA和抑制甲状腺分化功能,(TPA > EGF)。效果迅速,PAA分泌和增加减少(125)我在4 h而被吸收EGF, 24小时孵化是必需的。显示显著增加mRNA的表达对tPA uPA较小影响。抑制PAA,增加(125)我但不吸收废除TPA和表皮生长因子的影响。抑制剂,PD98059部分逆转的影响EGF和TPA PAA,很大程度上扭转了EGF但不是TPA对分化的影响函数。和具体PKCbeta抑制剂,LY379196完全逆转TPA(125)我的影响吸收和PAA而EGF作用不受影响。这种效应被LY379196但不是PD98059。反向激活与我(125)吸收和直接与PA表达式,与营地的影响。TPA对碘代谢的影响,解散毛囊和uPA合成是介导主要通过PKCbeta而EGF施加它的影响通过MAPK但不是PKCbeta。细胞。Wiley-Liss公司。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号