Citrate oxidation was studied utilizing an in vitro preparation of rat ventral prostate which was very similar, with respect to citrate metabolish, to the intact prostate. The rate of citrate oxidation was very slow in comparison to kidney, although citrate entered prostatic tissue and accumulated intracellularly. Citrate was converted to isocitrate at a rate which resulted in a constant citrate/isocitrate ratio over a 10-fold variation in medium citrate concentration. The prostate oxidized significantly more alpha-ketoglutarate and malate than citrate. These results suggested that limited citrate oxidation could account for the accumulation of high prostatic citrate levels.
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