Quantitative profiling of tissue- and gender-related expression of glutathione S-transferase isoenzymes in the mouse

被引:66
作者
Mitchell, AE
Morin, D
Lakritz, J
Jones, AD
机构
[1] UNIV CALIF DAVIS,FACIL ADV INSTRUMENTAT,DAVIS,CA 95616
[2] UNIV CALIF DAVIS,SCH VET MED,DEPT MOL BIOSCI,DAVIS,CA 95616
[3] UNIV CALIF DAVIS,SCH VET MED,DEPT ANAT PHYSIOL & CELL BIOL,DAVIS,CA 95616
关键词
D O I
10.1042/bj3250207
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Cytosolic glutathione S-transferase (GST) isoenzymes from brain, heart, lung, liver, kidney and gonads of male and female CD-1 mice were identified and quantified with a combination of affinity purifrcation, electrospray ionization MS, Edman microsequencing, Western blot analysis and reverse-phase HPLC. The three principal hepatic GST subunits, mGSTA3 (25271 Da), mGSTP1 (23478 Da), and mGSTM1 (25 839 Da), were isolated from liver, lung, kidney, testes and female heart, whereas brain, ovaries and male heart contained mGSTM1 and mGSTP1. Additional isoenzymes were detected in tissues, including mu class subunits mGSTM2 (25 580 Da) and mGSTM3 (25 570 Da), an N-terminally blocked Alpha subunit (25 480 Da) assigned as mGSTA4, and proteins of molecular masses 25490, 22540, 24493, 24378 and 25383 Da. Distinct gender differences in expression of GST subunits were observed for liver, heart, kidney and gonads, whereas GST expression was similar in brain and lung for both genders. In contrast with patterns of expression in liver (high ratio of mGSTA3 to mGSTP1 in females relative to males), mGSTP1 was the most abundant subunit in female gonads, whereas mGSTA3 was not present in detectable quantities. The profile of GST expression in kidney was similar to that in liver; however, male kidneys expressed 30% more soluble GST than female kidneys. A striking gender-related difference in GST expression was found in cardiac tissue, where female animals expressed 50% more soluble GST than male tissues, and the GST isoenzyme with the greatest documented activity towards lipid hydroperoxides, mGSTA3, was present in female tissue yet absent from male tissue. These results point to complex gender- and tissue-dependent expression of individual mouse GST isoenzymes.
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页码:207 / 216
页数:10
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