alexa Uptake of labeled alloxan in mouse organs and mitochondria in vivo and in vitro.
Infectious Diseases

Infectious Diseases

Journal of AIDS & Clinical Research

Author(s): Boquist L, Nelson L, Lorentzon R, Boquist L, Nelson L, Lorentzon R

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Abstract [14C]2-Alloxan was administered in vivo and in vitro for study of the uptake of alloxan in different organs and their mitochondia of mice. After in vivo administration, radioactivity was demonstrated in all organs investigated, with quantitative differences: endocrine pancreas greater than liver greater than exocrine pancreas and heart. No significant difference was found between the iv and ip routes of injection. An in vivo uptake of alloxan was also found in mitochondria, with significant quantitative differences as to the origin of the organelles: endocrine pancreas greater than liver greater than exocrine pancreas and heart. Pretreatment with D-glucose caused significantly decreased uptake in liver, exocrine pancreas, and heart, but significantly increased uptake in endocrine pancreas, whereas the uptake was significantly decreased in the mitochondria from all of these organs. In vitro uptake was observed in all kinds of mitochondria studied. This uptake was higher than the in vivo uptake in mitochondria from liver, exocrine pancreas, and heart, whereas the uptake in vivo was higher than the in vitro uptake in islet mitochondria. The presence of D-glucose did not affect the in vitro uptake of alloxan in mitochondria. The findings show that in vivo, alloxan passes across plasma membranes and is taken up by mitochondria, and data obtained with mitochondrial subfractions may also indicate a passage across mitochondrial membranes. D-Glucose protection against alloxan diabetogenicity may be associated with prevention of mitochondrial uptake of alloxan. This prevention seems to be dependent on the metabolism of glucose. This article was published in Endocrinology and referenced in Journal of AIDS & Clinical Research

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