Elevation of Endogenous Nucleophiles in Rat Lung by Cysteine and Glutathione Esters In Vitro
作者:Michael J Hobbs、Nancy E Williams、Shailesh K Patel、David G Upshall
DOI:10.1016/s0006-2952(97)00674-6
日期:1998.5
increased by up to 60%, 95% and 58%, respectively, whereas GSH isopropyl monoester and gamma-glu-cys isopropyl monoester did not increase the intracellular GSH concentration. Extracellularly, the GSH concentration had decreased by 15%, GSH isopropyl diester by 27%, gamma-glu-cys isopropyl diester by 66% and both isopropyl monoesters by over 90% at 120 min. Lung slices and tracheal sections incubated with L-
在这项研究中,我们比较了L-半胱氨酸(L-CySH),D-半胱氨酸(D-CySH),L-半胱氨酸异丙酯(L-CIPE)和D-半胱氨酸异丙酯(D-CIPE)的吸收大鼠肺切片和气管切片并确定了谷胱甘肽(GSH),GSH异丙基单酯,GSH异丙基二酯,γ-谷氨酰半胱氨酸(γ-glu-cys)异丙基单酯和g-glu-cys异丙基二酯对提高和延长细胞内GSH的有效性大鼠肺切片中的浓度。将肺切片与1.0 mM的硫醇一起孵育,并随时间在细胞内和细胞外确定浓度。与GSH,GSH异丙基二酯和gamma-glu-cys异丙基二酯孵育的切片的细胞GSH浓度分别增加了60%,95%和58%。而GSH异丙基单酯和gamma-glu-cys异丙基单酯则不会增加细胞内GSH的浓度。在细胞外,120分钟时GSH浓度降低了15%,GSH异丙基二酯降低了27%,γ-glu-cys异丙基二酯降低了66%,两种异丙基单酯均降低了9