Chinese Journal of Tissue Engineering Research ›› 2014, Vol. 18 ›› Issue (20): 3275-3280.doi: 10.3969/j.issn.2095-4344.2014.20.029
Wang Shi-jun1, Li Yu-ting2, Sun Hao-lin1, Li Chun-de1, Wang Tian-long2
Received:
2013-03-25
Online:
2014-05-14
Published:
2014-05-14
Contact:
Li Chun-de, Professor, Doctoral supervisor, Department of Orthopedics, Peking University First Hospital, Beijing 100034, China
Corresponding author: Wang Tian-long, Professor, Doctoral supervisor, Department of Anesthesiology, Xuanwu Hospital, Capital Medical University, Beijing 100000, China
About author:
Wang Shi-jun, M.D., Attending physician, Department of Orthopedics, Peking University First Hospital, Beijing 100034, China
Li Yu-ting, Master, Physician, Department of Anesthesiology, Xuanwu Hospital, Capital Medical University, Beijing 100000, China
Wang Shi-jun and Li Yu-ting contributed equally to this work.
Supported by:
the National Natural Science Foundation of China (General Program), No. 81071504; Natural Science Foundation of Beijing, No. 7123231; the National Natural Science Foundation of China (Chief Program), No. 81241063
CLC Number:
Wang Shi-jun, Li Yu-ting, Sun Hao-lin, Li Chun-de, Wang Tian-long. Effect and mechanism of hydrogen sulfide in regulating cellular functions[J]. Chinese Journal of Tissue Engineering Research, 2014, 18(20): 3275-3280.
2.1 硫化氢的生成及硫化氢合成酶的代谢 在哺乳动物体内,内源性硫化氢的产生主要是靠两种内源性合成酶,包括胱硫醚-β-合成酶﹑胱硫醚-γ-裂解酶[10]。硫化氢主要是由半胱氨酸代谢产生的,半胱氨酸是由蛋氨酸代谢生成,但同时还生成同型半胱氨酸,同型半胱氨酸在胱硫醚-β-合成酶和胱硫醚-γ-裂解酶催化作用下与丝氨酸结合,生成胱硫醚,后者进一步分解为半胱氨酸和α-丙酮酸和硫化氢。胱硫醚-β-合成酶和胱硫醚-γ-裂解酶需要依赖磷酸吡多醛5’-磷酸作为辅酶。炔丙基甘氨酸(Propargylglycine,PPG)为胱硫醚- γ-裂解酶抑制剂,可以降低硫化氢生成,钙离子/钙调蛋白激活后可促使胱硫醚-γ-裂解酶生成更多硫化 氢[11]。硫化氢代谢途径见图1。胱硫醚-β-合成酶和胱硫醚-γ-裂解酶进化高度保守,它们在细菌内的序列与哺乳动物相似。有研究表明广谱抗生素应用时,硫化氢可以提高细菌存活率,敲除硫化氢合成酶基因的细菌更容易被抗生素杀死[12]。细菌"
[1] Vaux DL,Strasser A. The molecular biology of apoptosis. Proc Natl Acad Sci USA. 1996;93:2239. |
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