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首页> 外文期刊>Journal of genetics >Loss of smooth muscle myosin heavy chain results in the bladder and stomach developing lesion during foetal development in mice
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Loss of smooth muscle myosin heavy chain results in the bladder and stomach developing lesion during foetal development in mice

机译:平滑肌肌肉菌丝素重链导致小鼠胎儿发育过程中的膀胱和胃部发生病变

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Smooth muscle myosin heavy chain (SM-MHC) is exclusively expresses in smooth muscle, which takes part in smooth muscle cell contraction. Here, we used an insertional mutation mouse whose heavy polypeptide 11 (Myh11) gene has been disrupted and no SM-MHC protein has been detected. Compared to the wild-type and SM-MHC+/- mice, the SM-MHC-/- neonates had large round bellies, thin-walled giant bladders, and large stomachs with huge gas bubbles. Most of it died within 10 h and the rest within 20 h after birth. Further analysis of the developing foetuses from 16.5 days postcoitum (dpc) stage to newborn showed no significant (P 0.05) difference in the ratio of Mendelian inheritance and average body weight among SM-MHC+/+, SM-MHC+/- and SM-MHC-/- mice, whereas the abnormal exterior appearance was observed in each SM-MHC-/- bladders from 16.5 dpc. Histological analysis showed no difference in stomach tissues but evidently thin-walled smooth muscle layer and a giant cavity in bladders of SM-MHC-/- foetuses at various stages from 15.5 dpc to newborn. The results indicated that the defect of SM-MHC lead to the bladder developing lesions initially at 15.5 dpc stage in mouse and also implied that the SM-MHC loss might result in the gas bubbles in stomach. The study should facilitate further detailed analyses of the potential role of SM-MHC in bladder and stomach development.
机译:平滑肌肌霉链(SM-MHC)专门在平滑肌中表达,肌肉细胞缩小。在这里,我们使用了一种插入突变鼠标,其重致多肽11(MyH11)基因已被破坏并且没有检测到SM-MHC蛋白质。与野生型和SM-MHC +/-小鼠相比,SM-MHC - / - 新生儿有大圆腹,薄壁的巨型膀胱,以及巨大的气泡大胃。它的大部分都在10小时内死亡,剩下的剩余时间在出生后20小时内。从16.5天的产后(DPC)阶段到新生儿的显影胎儿的进一步分析没有显着的(P <0.05)的孟德尔+ / +,SM-MHC +/-和SM之间的孟德利亚遗传和平均体重的差异-MHC - / - 小鼠,而在每个SM-MHC - / - 膀胱中观察到异常外观,从16.5 DPC中观察到。组织学分析显示胃组织没有差异,但在来自15.5 dpc至新生儿的各个阶段,在SM-MHC - / - 胎儿的胎儿中显着薄壁平滑肌层和巨型腔。结果表明,SM-MHC的缺陷最初在小鼠的15.5dpc阶段最初导致膀胱发育损伤,并暗示SM-MHC损失可能导致气泡在胃中。该研究应促进进一步详细分析SM-MHC在膀胱和胃发育中的潜在作用。

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