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A prospective randomized controlled study on Suppression of Prostate Cancer by naftopidil (SNAP)

A prospective randomized controlled study on Suppression of Prostate Cancer by naftopidil (SNAP) - Suppression of prostate cancer by naftopidil (SNAP)

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-UMIN000022862
Enrollment
1200
Registered
2016-12-01
Start date
2016-12-01
Completion date
Unknown
Last updated
2026-09-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Prostate cancer

Interventions

Naftopidil is administered to the patient assigned to naftopidil administration group. (3-5 years) Not to those assigned to non-administration group.(3-5 years)

Sponsors

University of Tokyo
Lead Sponsor

Eligibility

Sex/Gender
Male

Inclusion criteria

Inclusion criteria: (1) Criteria for selection 1) Patients whose cancer is not proved by the prostatic needle biopsy (for more than eight spots) performed within the past three months 2) Male patients at the aged of 40 years old or older and younger than 80 years at the time when the consent is acquired 3) Patients whose highest value within 6 months serum PSA levels are abnormal before the prostatic needle biopsy (more than 3.0 ng/ml for 50-64 years old , more than 3.5 ng/ml for 65-69 years old, more than 4.0 ng/ml for 70 years old or older) 4) Patients who are given sufficient description about participation in this study and sufficiently understand it, providing their consent in document by their own free will 5) Patients having prostatic hyperplasia

Exclusion criteria

Exclusion criteria: (2) Exclusion criteria 1) Patients who were given a diagnosis of prostate cancer or prostatic atypical (Atypical) (PIN: prostatic intraepithelial neoplasia is accepted) 2) Patients with the history of oral administration of anti-androgenic medicine or 5 alpha reductase inhibitor in the 6 months before the measurement of the serum PSA value the last time before prostate needle biopsy 3) Patients with the history of oral administration of naftopidil in the 3 months before prostate needle biopsy 4) Patients not having indication for oral administration of alpha1 adrenergic receptor blockers in patients with severe dysuria accompanied with prostatic hyperplasia (states such as urinary retention, urethral catheter placement, the intermittent urethral catheterization) 5) Patients who are currently taking steroid medicine on consecutive days 6) Patients with active urogenital infection (including acute prostatitis) 7) Patients with the history of malignant tumor (however, the cases that the disease was cured radically) 8) Patients who received antineoplastic agents (including therapeutic purposes other than malignant tumors) in the last 3 months before biopsy (for sustained release formulations, during drug release period) 9) Patients with severe hepatic dysfunction (AST (GOT) or ALT (GPT) of more than 100IU) 10) Patient with severe renal dysfunction (serum creatinine of more than 2.0 mg/dl) 11) Patients who are judged inappropriate by investigators

Design outcomes

Primary

MeasureTime frame
Primary evaluation item is the period from the day of registration and diagnosed as prostate cancer.

Secondary

MeasureTime frame
1) Malignancy of prostate cancer Malignancy is evaluated by properties of the cancer (Gleason score) and extent (positive number of needle biopsy / number of needle biopsy) 2) Rate of apoptosis of the prostatic cancer part and non-cancer part 3) Time before the serum PSA level is doubled from the baseline (doubling time) 4) Cancer incidence for other organs

Countries

Japan

Contacts

Public ContactDaisuke Yamada

the University of Tokyo Hospital Department of Urology

dyamada-tky@umin.net03-5800-8662

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Sep 19, 2026