A Phase 1 Study of the Polymerase Theta (POLθ) Inhibitor Novobiocin in BRCA- Mutant and Other DNA Damage Repair-Deficient Solid Tumors
Summary
This phase I trial tests the safety, side effects, and best dose of novobiocin in treating cancer patients with alterations in deoxyribonucleic acid (DNA) repair genes. Novobiocin is an antibiotic that blocks the activity of a protein called DNA polymerase theta, which helps repair DNA that has become damaged as cells grow and divide. Cancer cells that cannot repair their damaged DNA die. This medication may help shrink or stabilize cancer with a mutation in DNA repair genes.
Detailed description
PRIMARY OBJECTIVE: I. To determine the maximum tolerated dose (MTD) and recommended phase 2 dose (RP2D) of novobiocin sodium (novobiocin) administered on a 5-days on/2-days off schedule in patients with solid tumors carrying homologous recombination (HR) or DNA damage repair (DDR) alterations that are poly (ADP-ribose) polymerase (PARP) inhibitor-naïve or -resistant. SECONDARY OBJECTIVES: I. To observe and record anti-tumor activity. II. To evaluate the safety and tolerability of novobiocin administered on a 5-days on/2-days off schedule in patients with solid tumors carrying HR or DDR alterations that are PARP inhibitor-naïve or -resistant. III. To characterize the pharmacokinetic parameters of novobiocin administered on a 5-days on/2-days off schedule in patients with solid tumors carrying HR or DDR alterations that are PARP inhibitor- naïve or -resistant. IV. To determine the minimally biologically effective dose of novobiocin in patients with solid tumors carrying HR or DDR alterations that are PARP inhibitor-naive or -resistant using pre- and on-treatment biopsies to characterize novobiocin-mediated pharmacodynamic effects. V. To conduct a preliminary assessment of anti-tumor activity of novobiocin administered on a 5-days on/2-days off schedule. EXPLORATORY OBJECTIVES: I. Whole exome sequencing (WES) of pre- and time-of-progression biopsies to characterize tumors for HR deficiency (deleterious mutations/deletions in genes known to be involved in HR) and genomic changes mediating acquired resistance to novobiocin. II. Ribonucleic acid sequencing (RNAseq) on pre- and on-treatment biopsies, as well as time-of-progression biopsies for serial analysis of gene expression to identify determinants of response, resistance, and pathway adaptation to novobiocin. III. Correlation of baseline level of POLQ messenger ribonucleic acid (mRNA) with clinical outcome (complete response \[CR\], partial response \[PR\] or stable disease \[SD\] versus \[vs.\] progressive disease \[PD\]). IV. Correlation of ATM immunohistochemistry (IHC) with clinical outcome in patients with ATM-mutant cancers. OUTLINE: This is a dose-escalation study. Patients receive novobiocin sodium orally (PO) once daily (QD) for 5 days in a row followed by 2 days off each week. Treatment repeats every 28 days in the absence of disease progression or unacceptable toxicity. Patients also undergo tumor biopsy, medical imaging scans, and collection of blood samples throughout the trial. After completion of study treatment, patients are followed up every 3-6 months for 2 years.
Arms & interventions
- ProcedureBiopsy Procedure
Undergo tumor biopsy
- ProcedureBiospecimen Collection
Undergo blood sample collection
- ProcedureDiagnostic Imaging Testing
Undergo medical imaging scans
- BiologicalNovobiocin Sodium
Given PO
Outcome measures
Primary
Maximum tolerated dose (MTD) and recommended phase 2 dose of continuous novobiocin administration
The MTD will be identified as the dose for which the isotonic estimate of the toxicity rate is closest to the target toxicity rate. Standard hematological and non-hematologic parameters, scored using Common Terminology Criteria for Adverse Events version 5.0, will be used to define dose limiting toxicity.
Time frame: Up to 2 years
Secondary
Radiological response
Time frame: Up to 2 years
Response rate
Time frame: Up to 2 years
Clinical benefit rate
Time frame: Up to 2 years
Progression free survival
Time frame: From study enrollment until the identification of disease progression or death, assessed up to 2 years
Median duration of response
Time frame: Up to 2 years
Plasma concentrations of novobiocin
Time frame: Days 1 & 17 of cycle 1 (pre-treatment and 0.5, 1, 2, 4, 6, 8, & 24 hours post-treatment) and days 2 & 25 of cycle 2 (pre-dose and 24 hours post-treatment)
Biological effectiveness
Time frame: Up to 2 years
Eligibility criteria
Study locations (22)
City of Hope Comprehensive Cancer Center
Duarte, California, 91010
UCI Health - Chao Family Comprehensive Cancer Center and Ambulatory Care
Irvine, California, 92612
UC San Diego Moores Cancer Center
La Jolla, California, 92093
Los Angeles General Medical Center
Los Angeles, California, 90033
USC / Norris Comprehensive Cancer Center
Los Angeles, California, 90033
UC Irvine Health/Chao Family Comprehensive Cancer Center
Orange, California, 92868
University of California Davis Comprehensive Cancer Center
Sacramento, California, 95817
UC San Diego Medical Center - Hillcrest
San Diego, California, 92103
University of Chicago Comprehensive Cancer Center
Chicago, Illinois, 60637
National Cancer Institute Developmental Therapeutics Clinic
Bethesda, Maryland, 20892
National Institutes of Health Clinical Center
Bethesda, Maryland, 20892
Beth Israel Deaconess Medical Center
Boston, Massachusetts, 02215
Dana-Farber Cancer Institute
Boston, Massachusetts, 02215
NYU Langone Hospital - Long Island
Mineola, New York, 11501
Laura and Isaac Perlmutter Cancer Center at NYU Langone
New York, New York, 10016
Ohio State University Comprehensive Cancer Center
Columbus, Ohio, 43210
University of Oklahoma Health Sciences Center
Oklahoma City, Oklahoma, 73104
Huntsman Cancer Institute/University of Utah
Salt Lake City, Utah, 84112
Fred Hutchinson Cancer Center
Seattle, Washington, 98109
University of Washington Medical Center - Montlake
Seattle, Washington, 98195
University of Wisconsin Carbone Cancer Center - Eastpark Medical Center
Madison, Wisconsin, 53718
University of Wisconsin Carbone Cancer Center - University Hospital
Madison, Wisconsin, 53792