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Prostate Cancer : A Low Level Of Testosterone

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They found that the solution lied in the saturation, where the maximal growth of the prostate cancer was achieved at a low level of testosterone. This model was produced by Fowler and Whitmore, who concluded “normal endogenous testosterone levels may be sufficient to cause near maximal stimulation of prostatic tumors.” There final conclusion was that “there is not today—nor has there ever been—a scientific basis for the contention that a higher T concentration causes pCA growth, acutely or long-term.” This was a pivotal statement because many other research labs began to do work on this same theory, the only downfall was the majority of them were finding similar results to the Huggins and Hodges, and Fowler and Whitmore. [9]
The study …show more content…

Testosterone in this study was moderately correlated with SHBG but weakly correlated with estradilol. This is when Black et. al used the ratio of estradilol: testosterone because they found an attenuation between the ratio and the risk of acquiring prostate cancer. The overall conclusion that was acquired from the data that was found what that in men 70 years of age or greater a higher ratio of estradilol: testosterone was strongly associated with a reduced risk, and the control of the ratio would reduced the risk of acquiring prostate cancer. The risk of having prostate cancer was observed as higher with a ratio of 2:16α-hydroxyestrone. Even though it was found that there is low risk of getting prostate cancer, they did consider the balance is important in how aggressive the prostate cancer is, or may become. [4]
A study that was done by Chen et al observed that androgens like testosterone were vital in the growth and maintenance of prostate cancer. Subsequently, they gave large doses of these androgens to rodents. They other observations including that the incidence of prostate cancer was very low in men who were castrated, and androgens stimulate the in vitro proliferation of human prostate cells, and surgical or medical castration typically causes tumor regression. Before running any experiments, they first did

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