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Effects On Dihydrotestosterone Regulated Gene Expression In Benign Prostatic Hyperplasia Or Prostate Cancer

This study has been completed.
Sponsor:
Information provided by:
GlaxoSmithKline
ClinicalTrials.gov Identifier:
NCT00375765
First received: September 12, 2006
Last updated: May 21, 2009
Last verified: May 2009
History of Changes

September 12, 2006
May 21, 2009
April 2005
Not Provided
Relative change in PSA(Prostate-specific antigen)expression per cell at 3 months
Same as current
Complete list of historical versions of study NCT00375765 on ClinicalTrials.gov Archive Site
Relative change in PCA3 (a prostate cancer-specific gene) expression per cell at 3 months Relative change in prostate volume at 3 months
Same as current
Not Provided
Not Provided
 
Effects On Dihydrotestosterone Regulated Gene Expression In Benign Prostatic Hyperplasia Or Prostate Cancer
See Detailed Description

Dutasteride is used in the treatment of benign prostate enlargement (BPH).It inhibits conversion of testosterone (T) into the more potent dihydrotestosterone (DHT) to stop prostate (and possibly prostate cancer) growth. DHT regulates the expression of certain genes in the prostate. The pharmacodynamics of DHT reduction in the prostate were never investigated until now, as every measurement would require prostate tissue retrieval, which is medically and ethically unacceptable. A recently developed test is able to quantitatively measure gene expression in prostate-borne cells, in urine sediments after prostate massage. By measuring this gene expression in patients using dutasteride, it has become possible to assess the pharmacodynamics of gene expression reduction, which is representative for the pharmacodynamics of DHT reduction. Repeated prostate tissue sampling has therefore become unnecessary. This newly gained knowledge will lead to a better understanding of the action of dutasteride and will possibly help improve treatment of symptomatic BPH (Benign Prostatic Hyperplasia) and PrCa (Prostate Cancer)in the future.

A randomized, open-label, parallel-group pilot study, to assess the pharmacodynamic effect on dihydrotestosterone regulated gene expression, longitudinally and in a dose dependent manner, of 0.5mg or 3.5mg dutasteride administered orally once daily, for three months in men with symptomatic benign prostatic hyperplasia or during the period between baseline and radical prostatectomy in men with biopsy-proven, clinically localized prostate cancer.
Interventional
Phase 4
Allocation: Randomized
Endpoint Classification: Pharmacodynamics Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
  • Benign Prostatic Hyperplasia
  • Prostate Cancer
Drug: Dutasteride
Other Name: Dutasteride
Not Provided
Not Provided

*   Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
 
Completed
40
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Inclusion criteria:

  • Symptomatic BPH, or:

Biopsy proven, localised (cT1 or cT2) prostate cancer scheduled for radical operation

  • Able to swallow oral medication

Exclusion criteria:

  • Inability to void spontaneously (eg. dependence on catheter etc.)
  • History of (prior) prostate cancer Previous prostatic surgery
Male
50 Years and older
No
Contact information is only displayed when the study is recruiting subjects
Netherlands
 
NCT00375765
104274
Not Provided
Study Director, GSK
GlaxoSmithKline
Not Provided
Study Director: GSK Clinical Trials, MD, PhD GlaxoSmithKline
GlaxoSmithKline
May 2009

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP