PMID: 13878918Apr 1, 1962Paper

Studies on the transplanted heart. Its metabolism and histology

The Journal of Experimental Medicine
C ChibaR J Bing

Abstract

The metabolic changes in the homografted canine heart were studied in order to define the biochemical alterations accompanying homograft rejection. In several experiments, homograft rejection was accelerated by prior sensitization of the host animal. The homografted heart released pyruvate and lactate as well as malic dehydrogenase and aldolase. Extraction of glucose by the graft usually remained positive. During the accelerated rejection, the release of pyruvate and lactate was more pronounced, and even glucose appeared in increased concentrations in coronary vein blood. In many experiments the respiratory quotient of the transplanted heart as well as its glucose-oxygen extraction ratio were elevated. It seemed likely that the elevated respiratory quotients were the result of conversion of carbohydrates to fat, since the injection of thiamine hydrochloride resulted in further elevation of the respiratory quotient and in an increased myocardial pyruvate extraction. Apparently, thiamine corrected a metabolic block at the level of the cocarboxylase. The metabolic block or blocks present in the transplanted heart are likely to be the result of diminution in intracellular enzymes and coenzymes resulting from increased cellular perm...Continue Reading

References

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Apr 5, 2007·Nature Protocols·Tomomi HasegawaDavid J Pinsky
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