Biochemical characterization of prostatic nuclei. I. Androgen-induced changes in nuclear proteins L. W. Chung and D. S. Coffey Biochim Biophys Acta 1971 247: 570-83
Based on prior work, Dr. Coffey and colleagues demonstrated that the DNA, RNA and protein synthesis of the prostate gland varied with androgen levels (see the Historical Contribution: 1968). In this 1971 investigation (written in two parts), Drs. Chung and Coffey analyzed the nuclei and DNA content of rats following castration. They found that nuclei from prostate cells could easily be recovered in rats who were castrate (approximately 60%). However, in normal rats and those who received testosterone replacement (after castration) – the proportion of nuclei recovered was dramatically lower (13-15%). Thorough investigation determined a number of factors that contributed to the difference in prostate nuclei:
- Magnesium levels and the nuclear membranes are affected by testosterone levels. Aberrations in these normal cellular processes resulted in lower nuclei yield.
- Testosterone levels also affect the size of the nuclei (it had previously been demonstrated that testosterone affected the size of the whole prostate cell). Just as the prostate cell shrinks under castrate levels, so too does the prostate cell nucleus.
- Nuclear protein to DNA content (as measured by nuclear proteins and nuclear membrane proteins) is decreased with low testosterone levels and,
- … can be restored to normal after testosterone supplementation.
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