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- W128219340 abstract "Plasminogen activator was measured in the ventral prostates of non-castrated, castrated, and androgen-treated rats to determine whether changes in this activity correlated with the process of glandular involution. While the activity was very low in cytosolic extracts from the prostates of non-castrated rats, 2 days following castration the plasminogen activator activity increased in a near-linear fashion such that by day 7 it was 10-fold higher in terms of specific activity (per mg of protein) and cellular concentration (per mg of DNA). During this interval there was a rapid decrease in the cell population of the prostates. Treatment of the 7-day castrated rats with the potent androgen, dihydrotestosterone, both reduced the plasminogen activator activity and restored the cell number in a dose-related manner. Gel electrophoretic analysis revealed two major bands of plasminogen activator activity in the cytosolic extracts from 4- and 7-day castrated rats, plus additional minor bands in samples from 10- and 14-day castrated rats. Approx. 10% of the cellular concentration of plasminogen activator activity was recovered in association with an 18000g pellet fraction from the prostates; this fraction showed less heterogeneity of the plasminogen activator forms as observed by gel electrophoresis. Inhibitor studies indicated that the 18000g pellet fraction from the prostates of non-castrated rats possessed some plasminogen activator inhibitor activity, but the relative concentration of the inhibitor activity was small. We conclude that the involution of the prostate is probably associated with increased synthesis of plasminogen activators through a de-repression process which may involve loss of androgen receptors." @default.
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- W128219340 date "1984-07-01" @default.
- W128219340 modified "2023-10-09" @default.
- W128219340 title "Increased activity of plasminogen activators during involution of the rat ventral prostate" @default.
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- W128219340 doi "https://doi.org/10.1042/bj2210171" @default.
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