Literature DB >> 16600727

Intermittent use of testosterone inactivating pharmaceuticals using finasteride prolongs the time off period.

Mark C Scholz1, Robert I Jennrich, Stephen B Strum, Henry J Johnson, Brad W Guess, Richard Y Lam.   

Abstract

PURPOSE: Men with prostate cancer treated intermittently with TIP benefit from improved quality of life when TOP with recovered testosterone is prolonged. We examined factors influencing the duration of TOP.
MATERIALS AND METHODS: We retrospectively reviewed the charts of 101 men treated with intermittent TIP in a 9-year period. Men with positive bone scan, men in whom a PSA nadir of less than 0.1 ng/ml on TIP failed to be achieved and maintained and men in whom testosterone failed to recover to greater than 150 ng/dl during the first 12 months of TOP were excluded. Potential factors predicting prolonged TOP or accelerated time to AIPC were studied with Cox regression analysis.
RESULTS: Patient characteristics were clinical stage T1c-T2a in 51 and T2b-T3b in 11, PSA relapse in 29, and T3c, D0 or D1 in 10. Median PSA was 7.6 ng/ml, Gleason score was 3 + 4 = 7 and TIP duration was 15.8 months. The 60 group 1 patients received finasteride and the 41 in group 2 received no finasteride. Median TOP in groups 1 and 2 was 31 and 15 months, respectively, using Kaplan-Meier analysis. Cox regression analysis indicated that longer TIP, finasteride and increased age predicted longer TOP. A slow PSA decrease while on TIP, higher baseline PSA and increased Gleason score predicted shorter TOP. Cox regression analysis indicated that only higher clinical stage but not finasteride predicted the earlier onset of AIPC.
CONCLUSIONS: Finasteride doubles the duration of TOP. AIPC was not increased by finasteride after almost 9 years of observation.

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Year:  2006        PMID: 16600727     DOI: 10.1016/S0022-5347(05)00975-4

Source DB:  PubMed          Journal:  J Urol        ISSN: 0022-5347            Impact factor:   7.450


  17 in total

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4.  5-ARI use in active surveillance: Different paradigm than primary prevention but caution still needed.

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5.  Inhibition of 5alpha-reductase enhances testosterone-induced expression of U19/Eaf2 tumor suppressor during the regrowth of LNCaP xenograft tumor in nude mice.

Authors:  Shubham Gupta; Yujuan Wang; Raquel Ramos-Garcia; Daniel Shevrin; Joel B Nelson; Zhou Wang
Journal:  Prostate       Date:  2010-10-01       Impact factor: 4.104

6.  5α-Reductase inhibition coupled with short off cycles increases survival in the LNCaP xenograft prostate tumor model on intermittent androgen deprivation therapy.

Authors:  Laura E Pascal; Khalid Z Masoodi; Katherine J O'Malley; Daniel Shevrin; Jeffrey R Gingrich; Rahul A Parikh; Zhou Wang
Journal:  J Urol       Date:  2014-10-31       Impact factor: 7.450

7.  5α-reductase inhibition suppresses testosterone-induced initial regrowth of regressed xenograft prostate tumors in animal models.

Authors:  Khalid Z Masoodi; Raquel Ramos Garcia; Laura E Pascal; Yujuan Wang; Hei M Ma; Katherine O'Malley; Kurtis Eisermann; Daniel H Shevrin; Holly M Nguyen; Robert L Vessella; Joel B Nelson; Rahul A Parikh; Zhou Wang
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Review 8.  Intermittent versus continuous androgen deprivation therapy in advanced prostate cancer.

Authors:  Laurence Klotz
Journal:  Curr Urol Rep       Date:  2013-06       Impact factor: 3.092

9.  Androgen deprivation therapy in advanced prostate cancer: is intermittent therapy the new standard of care?

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10.  Prolongation of off-cycle interval by finasteride is not associated with survival improvement in intermittent androgen deprivation therapy in LNCaP tumor model.

Authors:  Yujuan Wang; Shubham Gupta; Vi Hua; Raquel Ramos-Garcia; Daniel Shevrin; Borko D Jovanovic; Joel B Nelson; Zhou Wang
Journal:  Prostate       Date:  2010-02-01       Impact factor: 4.104

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