The Effects of Testosterone on Prostate Tissue (ACYP-1)
NCT ID: NCT00161486
Last Updated: 2008-09-19
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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COMPLETED
PHASE1
13 participants
INTERVENTIONAL
2004-07-31
2004-11-30
Brief Summary
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Detailed Description
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Acyline suppresses LH and FSH, which are hormones made by the pituitary gland, thus blocking the signal from the brain that causes the testes to make testosterone. Therefore, Acyline blocks testosterone production. In preliminary studies, a single injection of Acyline reversibly lowered the FSH, LH and testosterone levels in the blood for approximately 15 days. Prolonged low levels of LH and FSH cause suppression of sperm production in normal men. However, men may experience some side effects from the low levels of testosterone caused by acyline, thus exogenous testosterone is required to sustain normal male androgen and organ effects without suppressing spermatogenesis. This combination of drugs is a promising male contraceptive regimen. In addition, millions of older men are using testosterone replacement to treat male "andropause"; low level testosterone associated with aging. However, the effect of testosterone on the prostate is unknown. Studies examining the effect of testosterone on the prostate are needed.
Conditions
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Keywords
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Study Design
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RANDOMIZED
PARALLEL
TREATMENT
SINGLE
Study Groups
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1
Placebo acyline injections every two weeks (2 doses) + placebo testosterone gel daily for 4 weeks
Placebo acyline
Placebo acyline injections every two weeks (2 doses)
Placebo Testosterone gel
placebo testosterone gel daily for 4 weeks
2
Acyline 300 μg/kg every two weeks (2 doses) + placebo Testosterone gel daily for 4 weeks
Acyline
Acyline 300 μg/kg every two weeks (2 doses) for 4 weeks
Placebo Testosterone gel
placebo testosterone gel daily for 4 weeks
3
Acyline 300 μg/kg every two weeks (2 doses) for 4 weeks + Testosterone gel 100 mg daily for 4 weeks
Testosterone gel
Testosterone gel 100 mg daily for 4 weeks
Acyline
Acyline 300 μg/kg every two weeks (2 doses) for 4 weeks
Interventions
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Testosterone gel
Testosterone gel 100 mg daily for 4 weeks
Acyline
Acyline 300 μg/kg every two weeks (2 doses) for 4 weeks
Placebo acyline
Placebo acyline injections every two weeks (2 doses)
Placebo Testosterone gel
placebo testosterone gel daily for 4 weeks
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
Exclusion Criteria
35 Years
55 Years
MALE
Yes
Sponsors
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Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
University of Washington
OTHER
Responsible Party
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University of Washington
Principal Investigators
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William J Bremner, MD
Role: PRINCIPAL_INVESTIGATOR
University of Washington
Locations
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University of Washington
Seattle, Washington, United States
Countries
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References
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Bhasin S, Singh AB, Mac RP, Carter B, Lee MI, Cunningham GR. Managing the risks of prostate disease during testosterone replacement therapy in older men: recommendations for a standardized monitoring plan. J Androl. 2003 May-Jun;24(3):299-311. doi: 10.1002/j.1939-4640.2003.tb02676.x. No abstract available.
Morgentaler A, Bruning CO 3rd, DeWolf WC. Occult prostate cancer in men with low serum testosterone levels. JAMA. 1996 Dec 18;276(23):1904-6.
Schatzl G, Madersbacher S, Thurridl T, Waldmuller J, Kramer G, Haitel A, Marberger M. High-grade prostate cancer is associated with low serum testosterone levels. Prostate. 2001 Apr;47(1):52-8. doi: 10.1002/pros.1046.
Nelson PS, Clegg N, Arnold H, Ferguson C, Bonham M, White J, Hood L, Lin B. The program of androgen-responsive genes in neoplastic prostate epithelium. Proc Natl Acad Sci U S A. 2002 Sep 3;99(18):11890-5. doi: 10.1073/pnas.182376299. Epub 2002 Aug 16.
Herbst KL, Anawalt BD, Amory JK, Bremner WJ. Acyline: the first study in humans of a potent, new gonadotropin-releasing hormone antagonist. J Clin Endocrinol Metab. 2002 Jul;87(7):3215-20. doi: 10.1210/jcem.87.7.8675.
Bagatell CJ, Matsumoto AM, Christensen RB, Rivier JE, Bremner WJ. Comparison of a gonadotropin releasing-hormone antagonist plus testosterone (T) versus T alone as potential male contraceptive regimens. J Clin Endocrinol Metab. 1993 Aug;77(2):427-32. doi: 10.1210/jcem.77.2.8345047.
Swerdloff RS, Bagatell CJ, Wang C, Anawalt BD, Berman N, Steiner B, Bremner WJ. Suppression of spermatogenesis in man induced by Nal-Glu gonadotropin releasing hormone antagonist and testosterone enanthate (TE) is maintained by TE alone. J Clin Endocrinol Metab. 1998 Oct;83(10):3527-33. doi: 10.1210/jcem.83.10.5184.
Tom L, Bhasin S, Salameh W, Steiner B, Peterson M, Sokol RZ, Rivier J, Vale W, Swerdloff RS. Induction of azoospermia in normal men with combined Nal-Glu gonadotropin-releasing hormone antagonist and testosterone enanthate. J Clin Endocrinol Metab. 1992 Aug;75(2):476-83. doi: 10.1210/jcem.75.2.1639948.
Page ST, Plymate SR, Bremner WJ, Matsumoto AM, Hess DL, Lin DW, Amory JK, Nelson PS, Wu JD. Effect of medical castration on CD4+ CD25+ T cells, CD8+ T cell IFN-gamma expression, and NK cells: a physiological role for testosterone and/or its metabolites. Am J Physiol Endocrinol Metab. 2006 May;290(5):E856-63. doi: 10.1152/ajpendo.00484.2005. Epub 2005 Dec 13.
Page ST, Lin DW, Mostaghel EA, Hess DL, True LD, Amory JK, Nelson PS, Matsumoto AM, Bremner WJ. Persistent intraprostatic androgen concentrations after medical castration in healthy men. J Clin Endocrinol Metab. 2006 Oct;91(10):3850-6. doi: 10.1210/jc.2006-0968. Epub 2006 Aug 1.
Mostaghel EA, Page ST, Lin DW, Fazli L, Coleman IM, True LD, Knudsen B, Hess DL, Nelson CC, Matsumoto AM, Bremner WJ, Gleave ME, Nelson PS. Intraprostatic androgens and androgen-regulated gene expression persist after testosterone suppression: therapeutic implications for castration-resistant prostate cancer. Cancer Res. 2007 May 15;67(10):5033-41. doi: 10.1158/0008-5472.CAN-06-3332.
Other Identifiers
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U 54 HD42454
Identifier Type: -
Identifier Source: secondary_id
03-9401-B
Identifier Type: -
Identifier Source: org_study_id