DEMONSTRATION OF A SPECIFIC CYTOSOL RECEPTOR IN THE NORMAL AND HYPERPLASTIC CANINE PROSTATE FOR 5α-ANDROSTANE-3α, 17α-DIOL

in Journal of Endocrinology
Authors:
C. R. EVANS
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C. G. PIERREPOINT
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SUMMARY

A specific receptor protein has been demonstrated for 5α-androstane-3α, 17α-diol in cytoplasmic extracts of normal and hyperplastic canine prostates. The receptor molecule, with a sedimentation coefficient of 4–5S, has been identified by the use of sucrose gradient centrifugation of tissue fractions which had been labelled in vitro with tritiated 5α-androstane-3α, 17α-diol. The receptor showed a relatively high affinity for this compound whereas binding could not be demonstrated with other labelled C19 steroids. In addition binding of tritiated 5α-androstane-3α, 17α-diol was not affected by the presence of 50-fold excesses of other C19 steroids.

 

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