首页> 外文期刊>American Journal of Physiology >Ovariectomy increases mitogens and platelet-induced proliferation of arterial smooth muscle.
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Ovariectomy increases mitogens and platelet-induced proliferation of arterial smooth muscle.

机译:卵巢切除术增加有丝分裂原和血小板诱导的动脉平滑肌增殖。

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摘要

Experiments were designed to determine how ovariectomy modulates mitogenic factors in platelets and how these factors affect proliferation of coronary arterial smooth muscle. Platelet-derived growth factors (PDGF(AB) and PDGF(BB)), transforming growth factors (TGF-beta(1) and TGF-beta(2)), and vascular endothelial growth factor (VEGF(165)) were quantified in platelet lysates and platelet-poor plasma from adult gonadally intact and ovariectomized female pigs by ELISA. Proliferation of cultured coronary arterial smooth muscle cells (SMCs) from both groups of pigs was determined in response to autologous or heterologous platelet lysates. Platelet concentrations of PDGF(BB), but not PDGF(AB), TGF-beta(1), and TGF-beta(2), increased with ovariectomy. VEGF(165) was not detected in platelets from either group. Proliferation of SMCs from ovariectomized females was significantly greater on exposure to autologous or heterologous platelet lysates than proliferation of SMCs from intact females. These results indicate that ovariectomy increases concentrations of PDGF(BB) in platelets. Higher levels of PDGF(BB) in platelets in synergy with other platelet-derived products could contribute to increased proliferative arterial response to injury after ovariectomy.
机译:设计实验以确定卵巢切除术如何调节血小板中的促有丝分裂因子,以及这些因子如何影响冠状动脉平滑肌的增殖。定量血小板衍生生长因子(PDGF(AB)和PDGF(BB)),转化生长因子(TGF-beta(1)和TGF-beta(2))和血管内皮生长因子(VEGF(165))。通过ELISA检测来自成年性腺完整和去卵巢的雌猪的血小板溶解产物和贫血小板血浆。响应自体或异源血小板裂解物,确定两组猪中培养的冠状动脉平滑肌细胞(SMC)的增殖。卵巢切除术使PDGF(BB)的血小板浓度升高,但PDGF(AB),TGF-β(1)和TGF-β(2)却没有升高。两组的血小板中均未检测到VEGF(165)。当暴露于自体或异源血小板裂解物中时,去卵巢雌性小鼠的SMC增殖要比完整雌性小鼠的SMC增殖大得多。这些结果表明,卵巢切除术会增加血小板中PDGF(BB)的浓度。与其他血小板衍生产品协同作用,血小板中较高水平的PDGF(BB)可能有助于增加卵巢切除术后对损伤的增殖性动脉反应。

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