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1. The administration of dihydrotestosterone to rats orchidectomized 7 days previously stimulated the synthesis of nuclear receptor in prostatic cells several hours in advance of DNA synthesis and mitosis. 2. The synthesis of nuclear receptor is tightly coupled to cell proliferation; consequently, in resting cells, there is no further net synthesis of nuclear receptor above the maximum of approx. 8000 molecules/cell. 3. After orchidectomy a rapid decline in the concentration of free androgen in the nuceus and a slower decline in the concentration of nuclear receptor are observed. 4. Owing  to the apparent scarcity of receptor-inactivating factors in the nucleus, and the inverse relationship between amounts of nuclear and cytoplasmic receptors, it is concluded that the nuclear receptor is discharged into the cytoplasm after orchidectomy. 5. The formation of the cytoplasmic receptor is an early event preceding the onset of cellular autolysis. 6. Regressing prostate develops the capacity to eliminate cytoplasmic receptor, and this capacity is retained by the regenerating prostate for at least 14 days. 7. The synthesis of nuclear receptor in early G1 phase may control the entry of cells into the cell cycle and the prolonged retention of receptor in the nucleus may prevent the activation of autophagic processes.

The relationship between adrogen receptors and the hormonally controlled responses of rat ventral prostate