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TRH: mediator of prolactin in the prostate?
1Department of Urology, Northwestern University Medical School, Chicago, IL 60611-3009.
Abstract:
Thanks to our preoccupation with androgen ablative therapy, no significant progress has been made in combating prostate cancer (PCa) in 50 years. Also, there have been only limited advances in medical treatment of benign prostatic hyperplasia (BPH). The intent of this essay is to explore the mode of participation of prolactin (Prl) in prostatic physiology in the hope that such knowledge will reveal new avenues through which both BPH and PCa can be opposed-even prevented. An especially novel aspect of this study is the recognition of the presence and androgen- and prolactin-dependent concentration of the tripeptide, thyrotropin-releasing hormone (TRH) in prostatic tissue. It is hypothesized that, whereas TRH is the hypothalamic stimulus of hypophyseal Prl secretion, it may, in the prostate, serve as the mediator of Prl's independent and androgen-dependent controls of the gland's growth and function. Through an overview of these relationships, methods are suggested both for their study and for their adaptation to early detection and prevention of imminent pathogenesis.
Insights
Limited progress in prostate cancer (PCa) and benign prostatic hyperplasia (BPH) treatment necessitates exploring new therapeutic targets. This study investigates prolactin (Prl) and thyrotropin-releasing hormone (TRH) roles in prostate health for novel prevention and treatment strategies.
Area of Science:
- Endocrinology
- Urology
- Oncology
Background:
- Prostate cancer (PCa) and benign prostatic hyperplasia (BPH) treatments have seen limited progress over 50 years, with a focus on androgen ablation.
- Current therapeutic options for PCa and BPH are insufficient, highlighting the need for novel approaches.
Purpose of the Study:
- To explore the role of prolactin (Prl) in prostate physiology.
- To investigate the potential of targeting Prl and thyrotropin-releasing hormone (TRH) for BPH and PCa prevention and treatment.
Main Methods:
- Review of existing literature on prolactin and TRH in prostatic physiology.
- Hypothesizing the role of TRH as a mediator of Prl's androgen-dependent control in the prostate.
- Suggesting methods for studying these relationships and their clinical applications.
Main Results:
- Prolactin (Prl) and thyrotropin-releasing hormone (TRH) are present in prostatic tissue.
- TRH concentration is dependent on androgens and Prl.
- TRH may mediate Prl's control over prostate growth and function.
Conclusions:
- Prolactin and TRH represent potential novel therapeutic targets for BPH and PCa.
- Understanding these hormonal pathways could lead to new strategies for early detection and prevention of prostate diseases.
- Further research is warranted to elucidate the precise mechanisms and clinical utility.
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