Abstract
Male albino rats were given intraperitoneal injections of choline chloride (0. 1,0.33 or 0.5 × lethal dose 50) for a total period of one month and then killed at the end of 30,90 and 240 days for the study of pathotoxicokinetics of choline. Chronic choline administration in rats caused a decrease in growth rate, a dose dependent modulating effect on the somatic tissue indices of lung and lymph nodes, as well as cellularity of lymph nodes. In another experiment, the effect of choline on mica induced pulmonary lesions was studied. The combined effect of choline and mica caused adenocarcinoma of bronchiolar epithelium and marked lymphadenopathy with abnormal cells in the lymph nodes at the termination of experiment (330 days). The results of the present investigation suggest that excess choline availability not only produces pulmonary pathological lesions by itself but it also further enhances the lung lesions in altered pulmonary conditions
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