Related Experiment Videos
A comparative study of effect of oral chronic cyanide administration on some rabbit tissue ATPases
N P Okolie1, I O Onoagbe, F A Aisien
1Department of Biochemistry, University of Benin, Nigeria.
Abstract:
The effect of oral KCN administration on Na(+)-K(+)-ATPase, Ca(2+)-ATPase and Mg(2+)-ATPase activities was studied in some rabbit tissues. Generally, the order of activity of the enzymes was kidney > liver > ileum > colon. There were significant decreases (P < 0.05) in the activities of all the ATPases in the tissues of KCN-treated rabbits relative to controls. The decreases in Na(+)-K(+)-ATPase and Ca(2+)-ATPase activities were most pronounced in liver and kidney. The decreases in ATPases suggest impairment of membrane function as a result of the toxic effect of cyanide.
Insights
Oral potassium cyanide (KCN) administration significantly reduced ATPase activities in rabbit tissues, indicating cyanide toxicity impairs membrane function. Kidney and liver showed the most pronounced decreases in Na(+)-K(+)-ATPase and Ca(2+)-ATPase.
Area of Science:
- Biochemistry
- Toxicology
- Physiology
Background:
- Adenosine triphosphatases (ATPases) are crucial enzymes for cellular energy metabolism and membrane transport.
- Cyanide is a potent toxin known to inhibit cellular respiration.
Purpose of the Study:
- To investigate the impact of oral potassium cyanide (KCN) administration on Na(+)-K(+)-ATPase, Ca(2+)-ATPase, and Mg(2+)-ATPase activities in various rabbit tissues.
- To determine the specific tissues most affected by KCN-induced ATPase inhibition.
Main Methods:
- Rabbits were administered oral KCN.
- ATPase activities (Na(+)-K(+)-ATPase, Ca(2+)-ATPase, Mg(2+)-ATPase) were measured in kidney, liver, ileum, and colon tissues.
- Enzyme activities in KCN-treated rabbits were compared to control groups.
Main Results:
- ATPase activity generally followed the order: kidney > liver > ileum > colon.
- Significant decreases (P < 0.05) in all measured ATPase activities were observed in KCN-treated rabbits compared to controls.
- The most pronounced reductions in Na(+)-K(+)-ATPase and Ca(2+)-ATPase activities were noted in the liver and kidney tissues.
Conclusions:
- Oral KCN administration leads to a significant reduction in ATPase activities across multiple rabbit tissues.
- The observed decreases in enzyme activity suggest that cyanide toxicity impairs essential membrane functions.
- Liver and kidney are particularly vulnerable to the inhibitory effects of cyanide on key ATPases.