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- W2029173007 abstract "Tritiated progesterone androstenedione and testosterone were incubated with testicular homogenates of 4- and 32-week-old Stanley-Gumbreck pseudohermaphrodite (Ps) and normal (N1) male littermate rats. In 15 and 180 minute incubations, both 4- and 32-week-old Ps testes converted all three substrates predominantly to androsterone and to a lesser extent androstanediol, while androstanediol in 4-week and testosterone in 32-week-old N1 testis were the major products. The addition of carrier testosterone (240 μg/g tissue) to 15 min incubations of testicular homogenates from 4- and 32-week-old N1 rats almost completely blocked the formation of androstanediol and markedly increased the accumulation of testosterone (47 and 41% from Progesterone-1,2- 3 H; 66 and 92% from androstenedione-l,2- 3 H) indicating that androstanediol formed in the absence of carrier testosterone is, most likely, a product of testosterone reduction. When similar incubations were repeated using testicular homogenates from 4- and 32-week-old Ps rats, testosterone accumulation was not greatly increased (4–11%) by the addition of carrier testosterone, but androsterone formation was completely inhibited. However, when the incubations of Progesterone-1 ,2- 3 H with 4- and 32-week-old Ps and N1 testis in the presence of carrier testosterone were continued for 180 min, the major fraction of radioactivity from 32-week-old N1 testis was testosterone (79%) while that from 4-week-old N1 testis was androstanediol (60%) and from 4-and 32-week-old Ps testis was both androsterone (44–45%) and androstanediol (22–33%). The present data indicate that 4-week-old Ps testis, like the N1, has a high level of ring A reductase activity but forms androsterone rather than androstanediol as its major product. Unlike the normal mature male rat testis, in which ring A reductase activity diminishes allowing testosterone to become the major product, the 32-week-old Ps testis maintains a high level of reductase activity." @default.
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- W2029173007 title "Steroid metabolism by testicular homogenates of the stanley-gumbreck pseudohermaphrodite male rat. I. increased formation of androsterone and androstanediol" @default.
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- W2029173007 doi "https://doi.org/10.1016/0039-128x(72)90080-3" @default.
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