Phase I Trial of Oral PX-866

• ClinicalTrials.gov Identifier: NCT00726583
• Recruitment Status: Completed
• First Posted: August 1, 2008
• Last Update Posted: May 17, 2018
• Sponsor: Cascadian Therapeutics Inc.
• Information provided by (Responsible Party): Seagen Inc. ( Cascadian Therapeutics Inc. )

Study Description

Brief Summary:

This study is being conducted to determine the safety and maximally tolerated dose of PX-866 when given orally on two different schedules: daily on days 1-5 and 8-12 of a 28 day cycle and daily on days 1-28 of a 28 day cycle.

Condition or disease	Intervention/treatment	Phase
Advanced Solid Tumors	Drug: PX-866	Phase 1

Detailed Description:

PX-866 is a targeted inhibitor of PI-3K. This study is being conducted to determine the maximally tolerated dose of PX-866 when given orally on two different schedules: daily on days 1-5 and 8-12 of a 28 day cycle and daily on days 1-28 of a 28 day cycle.

Study Design

• Study Type: Interventional (Clinical Trial)
• Estimated Enrollment: 90 participants
• Allocation: Non-Randomized
• Intervention Model: Single Group Assignment
• Masking: None (Open Label)
• Primary Purpose: Treatment
• Official Title: A Phase I Trial of Oral PX-866 (a PI-3K Inhibitor) in Patients With Advanced Solid Tumors
• Study Start Date: June 2008
• Actual Primary Completion Date: September 2011
• Actual Study Completion Date: September 2011

Arms and Interventions

Arm	Intervention/treatment
Experimental: Investigational Drug; Dose Escalation	Drug: PX-866; Oral solution, dose escalation, once per day on days 1 to 5 and 8 to 12 or days 1-28 of a 28 day cycle, until progression or development of unacceptable toxicity

Outcome Measures

Primary Outcome Measures :

1. Determine the MTD of PX-866 [ Time Frame: 28 days ]
2. Evaluate the safety profile of PX-866 [ Time Frame: 28 days ]
3. Evaluate pharmacodynamic measures of the effects of PX-866 on the phosphatidylinositol-3 kinase (PI-3K) pathway and related tumor markers. [ Time Frame: 28 days ]
4. Determine the PK profile of PX-866. [ Time Frame: 28 days ]

Secondary Outcome Measures :

1. Evaluate the anti-tumor activity of PX-866 in patients with advanced malignancies. [ Time Frame: 56 days ]

Eligibility Criteria

• Ages Eligible for Study: 18 Years and older (Adult, Older Adult)
• Sexes Eligible for Study: All
• Accepts Healthy Volunteers: No

Criteria

Inclusion Criteria:

• Histologically or cytologically confirmed diagnosis of advanced solid tumor and has failed or is intolerant of standard therapy, or for whom standard therapy does not exist.
• 18 years of age or older.
• ECOG performance status 0 to 1.
• Predicted life expectancy of at least 12 weeks.
• Discontinued prior chemotherapy or other investigational agents for at least three weeks prior to receiving the first dose of study drug (six weeks for mitomycin C, nitrosureas,vaccines,or antibody therapy)and recovered from the toxic effects of the prior treatment (recovered to baseline or ≤grade 1 per Common Toxicity Criteria for Adverse Events (CTCAE)).
• Discontinued any radiation therapy for at least four weeks and have recovered from all radiation-related toxicities (recovered to baseline or ≤CTCAE grade 1) prior to receiving the first dose of study drug. Palliative radiation of 10 fractions or less is permitted and a four week interval is not necessary (also allowed during therapy).
• Adequate hematologic function as defined by the following: WBC count >3,000 cells/μL; platelets >100,000/μL; hemoglobin >9 g/dL (may be transfused to this level); ANC >1500 cells/μL.
• Adequate hepatic function as defined by the following: bilirubin <1.5 mg/dL; aspartate aminotransaminase (AST/SGOT) & alanine aminotransferase (ALT/SGPT) <2.5 x ULN or <5 x ULN if due to metastatic disease.
• Adequate renal function as defined by serum creatinine level <1.5 mg/dL.

Exclusion Criteria:

• Any active infection at study entry.
• Known diabetes or fasting blood glucose>160 mg/dL.
• Known human immunodeficiency virus (HIV).
• Any serious concomitant systemic disorders that in the opinion of the investigator would place the patient at excessive or unacceptable risk of toxicity.
• Surgery within the four weeks prior to the first dose
• Significant central nervous system (CNS) or psychiatric disorder(s) that preclude the ability of the patient to provide informed consent.
• Known or suspected brain metastases that have not received adequate therapy or for which the patient requires treatment with steroids or anticonvulsants. In the case of previously treated brain metastases, a minimum four week interval between completion of radiation therapy and registration on study with radiologic evidence of stable or responding brain metastases is required. In the setting of previous CNS metastasectomy, adequate (minimum four week) recovery from surgery and/or radiation therapy should be documented.
• Leptomeningeal brain metastases should be excluded regardless of whether the metastases have been treated or not.
• History of seizures, non-healing wounds, or arterial thrombosis.
• Unstable atrial or ventricular arrhythmias requiring control by medication; any cardiac ischemic event experienced within the preceding six months; prior history of congestive heart failure requiring therapy.
• Breastfeeding or pregnant (confirmed by serum β-HCG within 10 days prior to the start of study treatment if applicable).
• Total gastrectomy, partial bowel obstruction or any gastrointestinal condition that may interfere with absorption of the study medication.
• Any condition that could jeopardize the safety of the patient and compliance with the protocol.

Contacts and Locations

Locations

United States, Colorado

University of Colorado Health Sciences Center

Aurora, Colorado, United States, 80045

United States, Texas

M.D. Anderson Cancer Center

Houston, Texas, United States, 77030

Sponsors and Collaborators

Cascadian Therapeutics Inc.

More Information

• Responsible Party: Cascadian Therapeutics Inc.
• ClinicalTrials.gov Identifier: NCT00726583
• Other Study ID Numbers: PX-866-001
• First Posted: August 1, 2008
• Last Update Posted: May 17, 2018
• Last Verified: October 2011

Keywords provided by Seagen Inc. ( Cascadian Therapeutics Inc. ):

Cancer; Solid Tumors; Carcinoma; PI-3K; PI3 kinase; PI3K