Effects of cadmium on ATPase activities were studied in microsomal fractions obtained from liver, kidney and testis of rats. The total ATPase activities were 5.829 ± 0.141 (S.D.) μmol/mg protein/hr, 35.992 ± 1.304μmol/mg protein/hr and 46.046 ± ...
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https://www.riss.kr/link?id=A30059430
1989
Korean
510
학술저널
35-44(10쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
Effects of cadmium on ATPase activities were studied in microsomal fractions obtained from liver, kidney and testis of rats. The total ATPase activities were 5.829 ± 0.141 (S.D.) μmol/mg protein/hr, 35.992 ± 1.304μmol/mg protein/hr and 46.046 ± ...
Effects of cadmium on ATPase activities were studied in microsomal fractions obtained from liver, kidney and testis of rats.
The total ATPase activities were 5.829 ± 0.141 (S.D.) μmol/mg protein/hr, 35.992 ± 1.304μmol/mg protein/hr and 46.046 ± 0.961 μmol/mg protein/hr in microsomes of normal liver, kidney and testis, respectively. The total activities of liver and kidney microsomes were inhibited by 34.4% and 39.60%, respectively, by addition of 2 mM ouabain but that of testis was not influenced by ouabain.
The inhibition of microsomal ATPase activity by cadmium were dose-dependent in the range of concentrations from 0.05 mM to 3.0 mM. The concentrations of cadmium causing 50% inhibition (I_so) of ATPase activity were calculated by probit method. Cadmium concentrations causing 50% inhibition of total ATPase activity were found to be 0. 458 mM, 0.310 mM and 0.730 mM in liver, kidney and testis, respectively. Ouabain insensitive (Mg^++-) ATPase of liver, kidney and testis were inhibited 50% by Cd in concentrations of 1.460 mM, 0.970 mM, 0.310 mM and 0.730 mM in liver, kidney and testis, respectively. Ouabain insensitive (Mg^++- ) sitive to Cd and were inhibited 50% in microsomes of liver and kidney by Cd concentrations of 0.086 mM and 0.058 mM, respectively. Thus ouabain-sensitive (Na^+, K(^+)-) ATPasc was 17 times more susceptible to cadmium than ouabain-insensitive (Mg(^++)- ) ATPase.
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