This partially randomized phase I trial studies the side effects and how well sequential dosing of vascular endothelial growth factor receptor (VEGFR)/platelet derived growth factor receptor (PDGFR) dual kinase inhibitor X-82 and docetaxel works in treating patients with solid tumors. VEGFR/PDGFR dual kinase inhibitor X-82 may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Drugs used in chemotherapy, such as docetaxel, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Giving VEGFR/PDGFR dual kinase inhibitor X-82 and docetaxel one at a time instead of concurrently may work in treating patients with solid tumors.
PRIMARY OBJECTIVES: I. To evaluate the safety and tolerability of intermittent X-82 (VEGFR/PDGFR dual kinase inhibitor X-82) when administered in a 2 week on, 1 week off schedule (Cycle #1). II. To evaluate the safety and tolerability of intermittent X-82 administered in combination with docetaxel every 3 weeks (Cycle #2). III. To determine the change in vascular parameters using 3'Deoxy-3'-fluorothymidine (FLT) positron emission tomography (PET)/computed tomography (CT) to X-82 alone (Cycle #1). IV. To determine the change in vascular parameters using FLT PET/CT to X-82 in combination with docetaxel (Cycle #2). SECONDARY OBJECTIVES: I. To determine the objective response using Response Evaluation Criteria In Solid Tumors (RECIST) 1.1 of intermittent X-82 with docetaxel. II. To measure the change in plasma vascular endothelial growth factor (VEGF) levels with changes on FLT PET/CT. III. To measure changes in X-82 pharmacokinetics with changes on FLT PET/CT. TERTIARY OBJECTIVES: I. To evaluate the safety and tolerability of sequential X-82 with docetaxel in disease sub-populations. (Dose expansion cohort) II. To evaluate the objective response rate of sequential X-82 with docetaxel in these disease sub-populations. (Dose expansion cohort) OUTLINE: Patients are randomized to 1of 2 treatment arms. ARM I: Patients receive high dose VEGFR/PDGFR dual kinase inhibitor X-82 orally (PO) once daily (QD) on days 2-15. Beginning course 2, patients also receive docetaxel intravenously (IV) over 60 minutes on day 1. ARM II: Patients receive low dose VEGFR/PDGFR dual kinase inhibitor X-82 PO QD on days 2-15 and docetaxel IV as in Arm I. In both arms, courses repeat every 21 days in the absence of disease progression or unacceptable toxicity. EXPANSION COHORT: Patients receive VEGFR/PDGFR dual kinase inhibitor X-82 as in Arm I and docetaxel IV over 60 minutes on day 1. Courses repeat every 21 days in the absence of disease progression or unacceptable toxicity.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
14
Given PO
Given IV
Undergo FLT PET/CT
Undergo FLT PET/CT
Correlative studies
Correlative studies
University of Wisconsin-Carbone Cancer Center
Madison, Wisconsin, United States
Incidence of toxicity graded according to National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) version 4.0 (Pharmacodynamic study)
The number and severity of toxicities and adverse events will be summarized using frequencies and percentages and stratified by X-82 dose level (low or high) and treatment (X-82 alone or X-82/docetaxel). Ninety-five percent confidence intervals for the toxicity rates will be constructed.
Time frame: Up to 2 years
Changes in the FLT PET/CT vascular parameters for VEGF/PDGF dual kinase inhibitor X-82
The changes in FLT PET/CT parameters will be calculated and summarized using descriptive statistics and compared using a paired t-test or non-parametric Wilcoxon signed rank test.
Time frame: Baseline to day 15 (course 1)
Changes in the FLT PET/CT vascular parameters for the combination of VEGFR/PDGFR dual kinase inhibitor X-82 and docetaxel
The changes in FLT PET/CT parameters will be calculated and summarized using descriptive statistics and compared using a paired t-test or non-parametric Wilcoxon signed rank test.
Time frame: Day 1 to day 15 (course 2)
Disease response assessed by the RECIST 1.1
All patients with measurable disease will be classified as having either progressive disease (PD), stable disease (SD), a partial response (PR), or a complete response (CR). Responses will be summarized in tabular format delineating complete and partial responses as well as stable and progressive disease. A ninety-five percent confidence interval for the RECIST response rate will be constructed for the X-82 (low and high dose)/docetaxel combination.
Time frame: Up to 2 years
Changes in VEGF
Changes in VEGF levels will be summarized using descriptive statistics. Pearson's or Spearman's rank correlation analysis will be used to correlate changes in VEGF and pharmacokinetic parameters with changes in FLT PET/CT parameters.
Time frame: Baseline to up day 15 (course 2)
Pharmacokinetic parameters of VEGFR/PDGFR dual kinase inhibitor X-82
Changes in X-82 pharmacokinetics will be summarized using descriptive statistics. Pearson's or Spearman's rank correlation analysis will be used to correlate changes in VEGF and pharmacokinetic parameters with changes in FLT PET/CT parameters.
Time frame: Within 3 hours prior to X-82 administration on days 1, 12-15, and 19-21 (course 1); and days 12-15 (course 2)
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