RT Journal Article
SR Electronic
T1 Inhibition of renal adenosine triphosphatase by cadmium.
JF Journal of Pharmacology and Experimental Therapeutics
JO J Pharmacol Exp Ther
FD American Society for Pharmacology and Experimental Therapeutics
SP 623
OP 629
VO 200
IS 3
A1 B R Nechay
A1 J P Sauners
YR 1977
UL http://jpet.aspetjournals.org/content/200/3/623.abstract
AB The effects of CdCl2 on adenosine triphosphatase (ATPase) were studied microsomal fractions or tissue homogenates of outer cortex, inner cortex and outer medulla of dog kidney. Cd was found to be an inhibitor of Na+ +K+ Atpase with 150 value of 2.1 to 3.2 X 10(-4) M regardless of type or source of the enzyme preparation tested. Mg++ ATPase was about 10-fold less sensitive to inhibition by Cd than Na+ +K+ ATPase. The inhibition of microsomal NA+ +K+ ATPase from outer medulla was characterized by irreversible kinetics. The inhibitory effect was not altered by varying Na+ or K+ concentrations, but was decreased by disodium ethylenediaminetetracetic acid (EDTA). EDTA was more effective in preventing than in reversing the inhibition. Na+ +K+ ATPase from kidneys of several other mammalian species showed a similar sensitivity to Cd.