Mesencephalic cavernous hemangioma

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Title:	Mesencephalic cavernous hemangioma
Authors:	Lee, CC;Lui, TN
Contributors:	附設醫院神經外科;CHANG GUNG MEM HOSP,DEPT NEUROSURG,TAYUAN,TAIWAN
Date:	1996
Issue Date:	2010-09-24 14:42:25 (UTC+8)
Publisher:	EXCERPTA MEDICA ASIA LTD
Abstract:	The effect of culture medium on glutathione (GSH) dependent detoxification defence system of primary cultured hepatocyte from either male or female rats was studied, Intracellular reduced (GSH) and oxidized glutathione (GSSG), and six GSH-related enzyme activities, including GSH peroxidase (GSH Pr), GSH reductase (GSH Rd), cytosolic GSH S-transferase (cGST), microsomal GSH S-transferase (mGST), gamma-glutamyl transpeptidase (GTP), and gamma-glutamylcysteine synthetase (GCS), were investigated during a 6-day culture. Media free of fetal bovine serum (FBS) and with 2.5 or 10% FBS were used. Whatever the medium, there was an initial increase of intracellular GSH and GSSG, a threefold increase of GSH at day 3 and fourfold increase of GSSG at day 4, later decreasing to their original level at day 6. The activities of all six GSH-related enzymes of male and female hepatocytes remained relatively stable during the first 72 h, then gradually decreased to 50-80% of initial activities. With the exception of cGST, time-course profiles of other enzyme activities were not significantly different among various media. In both sexes, higher cGST activity mas maintained for cells cultured in the presence dr FBS. Results of immunoblotting analysis of cytosolic GST isozymes indicate that the placental form of GST (Yp) was markedly increased after plating and the extent of increase of Yp was higher in the presence of FBS. Despite the culture medium, the level of GST isoform Ya was maintained steadily for 6 days, however, Yb was maintained during the first 3 days and then decreased. In terms of the gender difference, GSH PI; and GTP activities of hepatocytes from females were significantly greater than of males over the entire culture period. Results indicate that FBS seems not to be absolutely essential in maintaining GSH level and most of the GSH-reIated enzyme activities in rat hepatocytes. Furthermore, GSH levels and GSH-related enzyme activities of hepatocytes from female rats were similar to those from male rats.
Relation:	JOURNAL OF THE FORMOSAN MEDICAL ASSOCIATION 95(6):493-495
Appears in Collections:	[China Medical University Hospital] Jurnal articles

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