Clinical trial NCT00887458: A Two-dose Level Clinical Trial of Itraconazole in Patients With Metastatic Prostate Cancer Who Have Had Disease Progression While on Hormonal Therapy
Official title: A Randomized Phase II Clinical Trial of Two Dose-levels of Itraconazole in Patients With Metastatic Castration-resistant Prostate Cancer
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE2
Conditions: Prostate Cancer
Keywords: metastatic prostate cancer
castration resistant prostate cancer
rising PSA
Lead sponsor: Johns Hopkins University
Sponsor class: OTHER
Collaborators: name: Memorial Sloan Kettering Cancer Center
First posted: 2009-04-24
Enrollment: 46
Sex: MALE
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: This research is being done to test an investigational drug, called itraconazole, in the treatment of prostate cancer. Itraconazole is approved by the Food and Drug Administration (FDA) for the treatment of various fungal infections such as fingernail/toenail infections and other more serious fungal infections. The word "investigational" means that itraconazole is not approved for use in people with cancer. However, the FDA is allowing the use of itraconazole in this research study. Itraconazole has been shown to have activity against cancer (including prostate cancer) in the laboratory, but has not been tested against cancer in humans.

The purpose of this study is to find out:

* If itraconazole is safe when given at two different doses
* How itraconazole affects prostate specific antigen (PSA): a blood test that measures substances released by prostate cancer
* Whether itraconazole can delay further prostate cancer growth and spread
* How itraconazole affects other markers of prostate cancer

Detailed description: Itraconazole is an oral, generic, and commercially available antifungal drug with a long safety record when used at doses ranging from 200 to 600 mg daily.

Itraconazole has been shown in cellular and animal models to be a potent angiogenesis inhibitor as well as a Hedgehog pathway antagonist; both pathways are considered important in prostate cancer. Itraconazole has not previously been tested as an antineoplastic agent, but given its well-established safety profile, the gap between further preclinical studies and human clinical trials can be narrowed to accelerate development of this agent as a putative anticancer drug. The investigators hypothesize that itraconazole will prevent PSA progression in a significant proportion of men with metastatic CRPC and that it will have an acceptable safety profile at both doses. Itraconazole may ultimately delay the need for chemotherapy in these men.

Eligibility criteria: Inclusion Criteria:

* Histologically or cytologically confirmed prostate adenocarcinoma.
* Presence of distant metastases on bone scan, CT scan, or MRI scan.
* Progression after androgen deprivation (and anti-androgen withdrawal).
* Rising serum PSA (Prostate Cancer Working Group (PCWG2) definition).
* Castrate levels of serum testosterone (i.e., ≤ 50 ng/dL).
* Age \> 18 years.
* ECOG performance status score ≤ 2, and/or Karnofsky score ≥ 50%.
* Life expectancy \> 6 months.
* Adequate kidney, liver, and bone marrow function.
* Willingness to sign informed consent and adhere to study requirements.

Exclusion Criteria:

* Recent surgery, radiation therapy, combined androgen blockade, or investigational therapies in the last 8 weeks.
* Previous chemotherapy for metastatic prostate cancer.
* Concomitant use of second-line hormonal agents (e.g., ketoconazole, DES)
* Current use of corticosteroids, except if on a stable dose for ≥ 3 months.
* History of malabsorption syndrome (may affect itraconazole absorption).
* Allergic reactions to itraconazole or similar compounds.
* Concurrent use of drugs that interact with the CYP3A4 system (caution only).
* Presence of known brain metastases.
* Prior malignancy in the last 3 years, with some exceptions.
* Uncontrolled major infectious, cardiac, or pulmonary illnesses.
* Prolonged corrected QT interval (\> 450 msec) on electrocardiography.

Primary outcomes:
measure: To Determine the Proportion of Patients With Metastatic CRPC Who do Not Have Prostate Specific Antigen (PSA) Progression After 24 Weeks of Therapy With One of Two Dose-levels of Itraconazole: 200 mg or 600 mg Daily.
timeFrame: Up to 24 weeks
Secondary outcomes:
measure: To Determine the Proportion of Men With ≥ 50% PSA Reduction From Baseline.
timeFrame: Baseline and approximately 2 years from open enrollment
Other outcomes:
Locations:
city: Baltimore
country: United States
facility: Johns Hopkins Hospital
state: Maryland
city: Ann Arbor
country: United States
facility: University of Michigan Comprehensive Cancer Center
state: Michigan
city: Detroit
country: United States
facility: Karmanos Cancer Center
state: Michigan
city: New York
country: United States
facility: Memorial Sloan-Kettering Cancer Center
state: New York
Study officials:
affiliation: Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
name: Michael A Carducci, MD
role: PRINCIPAL_INVESTIGATOR
References: