Clinical trial · Interventional
Pharmacokinetic and Efficacy Study of Nordihydroguaiaretic Acid (NDGA) in Non Metastatic Recurrent Prostate Cancer
A Phase II Pharmacokinetic and Efficacy Study of Nordihydroguaiaretic Acid (NDGA) in Non-Metastatic Recurrent Prostate Cancer
NCT00678015CI-TRIAL-00014221terminatedPhase 2Results postedClinicalTrials.gov clinicaltrialsProvenance
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Why stopped (as posted): Per protocol - interim analysis showed no significant PSA declines among the first 12 patients after 3 cycles of treatment
Summary
Brief summary (as posted)
This is a Phase II, single center study measuring the pharmacokinetic parameters of NDGA administration and assessing the proportion of patients who experience a 50% decline in PSA.
Conditions
Conditions (1)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Prostate Cancer | Malignant Prostate Neoplasm | CURATED_EXACT | 0.92 |
Interventions
Interventions (1)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| Nordihydroguaiaretic Acid (NDGA) | Drug | — | UNRESOLVED |
Design
Arms and outcomes
Arms (1)
- type
- EXPERIMENTAL
- label
- 1
- interventionNames
- Drug: Nordihydroguaiaretic Acid (NDGA)
Primary outcomes (1)
- measure
- Prostate Specific Antigen (PSA) Response According to Consensus Criteria
- timeFrame
- Monthly, up to 29 months
- description
- Participants who experienced a PSA decline of at least 50%, confirmed by a second PSA value 4 or more weeks later. The reference PSA for decline was a PSA measured within 2 weeks of beginning study treatment. If at most 1 PSA response was observed among the first 12 patients, then accrual would stop and the trial would close for futility.
Eligibility
Eligibility (as posted)
- Sex
- Male
- Minimum age
- 18 Years
Show eligibility criteria text
Inclusion Criteria: * Rising prostate-specific antigen (PSA) value after local therapy with a PSA doubling time (PSADT) between 6 and 24 months (four or more readings at least two weeks apart within the last six months) * Prior definitive therapy for prostate cancer consisting of one of the following: 1. External beam radiotherapy with or without hormone therapy 2. Brachytherapy with or without pelvic external beam radiation or hormone therapy 3. Radical prostatectomy with or without adjuvant or salvage radiation therapy * PSA \> 1 ng/ml, which has risen serially on two determinations at least one week apart * Progressive disease by "Phoenix" consensus definition for patients who have undergone primary radiation therapy (PSA nadir + 2 ng/mL) * No metastatic disease * Prior adjuvant or neoadjuvant androgen deprivation is permitted, provided: 1. \> 6 months since last day of effective androgen deprivation 2. Testosterone \> 250 ng/dL 3. Patient is not on intermittent androgen deprivation * Karnofsky performance status (KPS) of \> 70% * Liver Function Tests are within normal range * Glycated hemoglobin (HgA1c) \< 6% * Patients must be four weeks from major surgery or radiotherapy to be eligible Exclusion Criteria: * Presence of another active malignancy other than prostate cancer, or treated squamous/basal cell carcinoma of the skin. Concomitant medical condition which would make it undesirable, in the physician's opinion, for the patient to participate in the protocol or would jeopardize compliance with the protocol requirements * Diabetes mellitus, unless diet-controlled * Must be off saw palmetto, pomegranate juice, finasteride, or any herbal agent intended to lower PSA for \> 4 weeks. Baseline PSADT calculation must occur off of these agents * Patients may not have evidence of local-only recurrence of prostate cancer * No history of liver disease, including Hepatitis B or C, alcoholic liver disease, or autoimmune liver disease. A prior history of Hepatitis A is allowed provided that baseline liver function tests are within normal limits * Patients with castration resistant prostate cancer are ineligible (prostate cancer which has progressed on androgen deprivation therapy with a Luteinizing hormone-releasing hormone (LHRH)-agonist or orchiectomy)
References
Publications (1)
- RESULTFriedlander TW, Weinberg VK, Huang Y, Mi JT, Formaker CG, Small EJ, Harzstark AL, Lin AM, Fong L, Ryan CJ. A phase II study of insulin-like growth factor receptor inhibition with nordihydroguaiaretic acid in men with non-metastatic hormone-sensitive prostate cancer. Oncol Rep. 2012 Jan;27(1):3-9. doi: 10.3892/or.2011.1487. Epub 2011 Oct 4. PMID 21971890