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Distribution of uniformly labeled carbon 14 fructose in the mice studied by whole body auto radiography



Distribution of uniformly labeled carbon 14 fructose in the mice studied by whole body auto radiography



Acta Histochemica et Cytochemica 14(2): 153-162



Tissue and organ distribution of 14C from 14C-labeled fructose in the mouse was studied by whole-body autoradiography. The mice were injected i.p. with 12 .mu.Ci of D-[U-14C]fructose and killed after different intervals (5, 30 min, 1, 3, 6 and 24 h). Autoradiography of the whole-body sections (untreated and treated with ice-cold 6% HC1O4) and densitometry were carried out. At 5 min after injection, a large amount of the injected fructose still remained in the abdominal cavity. Highest autoradiographic densities at time were in the kidney, liver and blood. The large and small intestinal mucosa showed relatively high density. At 30 min, the highest densities occured in the large intestinal mucosa, Harderian gland and kidney medulla, while the abdominal cavity did not show any significant radioactivity. At 1 h, the highest density occurred in the large intestinal mucosa, while a relatively high density was found in the small intestinal mucosa, kidney, sublingual and Harderian glands, and pancreas. At 3 h, the sublingual and submandibular glands attained the highest density. In the other organs, the densities at this time were lower than those at 1 h. At 6 and 24 h, the densities in all tissues and organs except for the brown fat decreased compared with those at 3 h. Incorporation of 14C from [U-14C]fructose into acid-insoluble substances was high for all glands observed, but low for the blood, liver, brain, muscle and lung.

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