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硫化氢对急性坏死性胰腺炎及相关肺损伤作用的初步探讨
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- Author:
- No author available
- Journal Title:
- Chinese Journal of Pancreatology
- Issue:
- 2
- DOI:
- 10.3760/cma.j.issn.1674-1935.2012.02.018
- Key Word:
- No keyword available
Abstract： 硫化氢(H2S)是一种小分子质量脂溶性气体分子,可以自由渗透入细胞膜发挥生物效应.在哺乳动物体内,以L-半胱氨酸为底物,通过激活5’-磷酸吡哆醛依赖性酶-胱硫醚-γ裂解酶(cystathionine γ-lyase,CSE,EC 4.4.1.1)和胱硫醚-β合成酶(cystathionine β-synthase,CBS,EC 4.2.1.22)生成H2S[1].H2S在体内主要有2种存在形式,约1/3以气体H2S形式存在,约2/3以NaHS (HS-)形式存在.大量证据显示[1-2],H2S在调节血管、胃肠道、心肌收缩、神经传递和胰岛素分泌等方面起着重要的作用.
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