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The effect of mitochondrial dysfunction on glucose metabolism during shock
Advances in Shock Research
|January 1, 1978
Summary
Hemorrhagic shock in rats frequently caused low blood sugar (hypoglycemia) and impaired liver energy production. Hypoglycemia resulted from both glycogen depletion and mitochondrial dysfunction, impacting gluconeogenesis.
Area of Science:
- Biochemistry
- Physiology
- Pathophysiology
Background:
- Hemorrhagic shock leads to complex metabolic disturbances.
- Understanding the interplay between liver function and energy metabolism is crucial during shock.
Purpose of the Study:
- To investigate the relationship between hepatic glycogen, blood glucose, lactate, and mitochondrial function in rats during late hemorrhagic shock.
- To elucidate the mechanisms underlying hypoglycemia in this condition.
Main Methods:
- Measurement of hepatic glycogen content, blood glucose, and lactate concentrations in rats.
- Assessment of hepatic mitochondrial energy-linked functions.
- Correlation analysis to determine relationships between variables.
Main Results:
- Hypoglycemia, lactic acidemia, and hepatic glycogen depletion were common during hemorrhagic shock.
- Neither glycogen depletion nor uncoupled mitochondrial oxidative phosphorylation alone explained hypoglycemia.
- Hypoglycemia arose from the combined occurrence of both glycogen depletion and mitochondrial dysfunction.
- Uncoupled mitochondrial oxidative phosphorylation correlated linearly with blood glucose and hepatic glycogen (r=0.94), suggesting impaired gluconeogenesis.
Conclusions:
- Hypoglycemia in hemorrhagic shock is a multifactorial event, dependent on both substrate availability and mitochondrial capacity.
- Mitochondrial dysfunction significantly impairs the liver's ability to produce glucose (gluconeogenesis) during shock.