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. 1969 Oct;48(10):1862–1869. doi: 10.1172/JCI106152

Effect of decreased O2 supply to tissue on the lactate:pyruvate ratio in blood

William A Neill 1, Peter E Jensen 1, Gerald B Rich 1, John D Werschkul 1
PMCID: PMC322422  PMID: 5822591

Abstract

Experiments were performed with trained conscious dogs with permanently implanted intravascular catheters. With the dogs in a basal resting state, the concentrations of lactate (L) and pyruvate (P) in arterial blood fluctuated widely from day to day, whereas their concentration ratio (L/P) remained relatively constant. By contrast, decrease in tissue O2 supply induced by severe chronic anemia increased the arterial blood L/P, specifically, with only random accompanying changes in the lactate or pyruvate concentrations themselves.

When systemic O2 consumption was increased acutely by muscular exercise, cardiac output increased, and the changes in blood L/P were small and not consistent between different dogs. But when O2 supply to the tissues was simultaneously limited by anemia, L/P increased during exercise, and the magnitude of the increase was proportional to the severity of the anemia. These results suggest that changes in blood L/P during exercise are related specifically to tissue O2 supply.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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