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Bonkhoff 2008: Östrogene u.Rezeptoren beim PK-Progress

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    Bonkhoff 2008: Östrogene u.Rezeptoren beim PK-Progress

    Ich fand auch diese neue Veröffentlichung von Prof.Bonkhoff und, so nehme ich an, Dr. Richard Berges von der Kölner PAN-Klinik.
    Bis jetzt nur der PubMed-Abstract, ich hoffe, dass ich den fulltext noch bekomme.

    Hier setzt Prof.Bonkhoff seine Forschungen zu den Östrogenen und Östrogen-Rezeptoren beim Prostatakarzinom durch einen weiteren Beitrag fort.
    Mit Sicherheit hochinteressant, sind wir doch auch auf diesem Gebiet immer noch ziemlich unsicher, ob und wann die Gabe von Östrogenen sinnvoll ist oder nicht doch vielmehr das Gegenteil, also die Blockung von Östrogen-Rezeptoren.
    Die Unterscheidung zwischen Ö-Rezeptor-alpha und -beta ist ein wichtiges Einstiegs-Konzept.
    Aber erstmal den fulltext abwarten.

    Rudolf

    ++++++++++++++++++++++++++++

    Eur Urol. 2008 Nov 6. [Epub ahead of print]

    The Evolving Role of Oestrogens and Their Receptors in the Development and Progression of Prostate Cancer.

    Bonkhoff H, Berges R.

    Tietzenweg 129, 12203 Berlin, Germany.

    CONTEXT: Oestrogens were proven effective in the hormonal treatment of advanced prostate cancer (PCa) >60 yr ago and are still used as second-line hormonal therapy. Paradoxically, oestrogens might also be involved in the development and progression of PCa.

    OBJECTIVE: To examine mechanisms of how oestrogens may affect prostate carcinogenesis and tumour progression.

    EVIDENCE ACQUISITION: Recent data obtained from animal, experimental, and clinical studies were reviewed.

    EVIDENCE SYNTHESIS: The human prostate is equipped with a dual system of oestrogen receptors (oestrogen receptor alpha [ERalpha], oestrogen receptor beta [ERbeta]) that undergoes profound remodelling during PCa development and tumour progression. In high-grade prostatic intraepithelial neoplasia (HGPIN), the ERalpha is upregulated and most likely mediates carcinogenic effects of estradiol as demonstrated in animal models. Preliminary clinical studies with the ERalpha antagonist toremifene have identified the ERalpha as a promising target for PCa prevention. The partial loss of the ERbeta in HGPIN indicates that the ERbeta acts as a tumour suppressor. The ERbeta is generally retained in hormone-naïve PCa but is partially lost in castration-resistant disease. The progressive emergence of the ERalpha and the oestrogen-regulated progesterone receptor (PR) during PCa progression and hormone-refractory disease suggests that these tumours can use oestrogens and progestins for their growth. The TMPRSS2-ERG gene fusion recently reported as a potentially aggressive molecular subtype of PCa is regulated by ER-dependent signalling. TMPRSS2-ERG expression has been found to be increased by ERalpha agonist (oestrogens) and decreased by ERbeta agonists.

    CONCLUSIONS: Oestrogens and their receptors are implicated in PCa development and tumour progression. There is significant potential for the use of ERalpha antagonists and ERbeta agonists to prevent PCa and delay disease progression. Tumours equipped with the pertinent receptors are potential candidates for this new therapeutic approach.

    PMID: 19013008 [PubMed - as supplied by publisher]
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