On February 14, 2023 Monopar Therapeutics Inc. (Nasdaq: MNPR), a clinical-stage biopharmaceutical company focused on developing proprietary therapeutics designed to extend life or improve the quality of life for cancer patients, reported the following update on its currently enrolling open-label Phase 1b camsirubicin Maximum Tolerated Dose (MTD) trial in patients with advanced soft tissue sarcoma (ASTS) (Press release, Monopar Therapeutics, FEB 14, 2023, View Source [SID1234627189]).
Schedule your 30 min Free 1stOncology Demo!
Discover why more than 1,500 members use 1stOncology™ to excel in:
Early/Late Stage Pipeline Development - Target Scouting - Clinical Biomarkers - Indication Selection & Expansion - BD&L Contacts - Conference Reports - Combinatorial Drug Settings - Companion Diagnostics - Drug Repositioning - First-in-class Analysis - Competitive Analysis - Deals & Licensing
Schedule Your 30 min Free Demo!
Monopar has opened enrollment for the fifth dose level cohort, at an increased dose of 650 mg/m2, which is nearly 2.5x the highest dose evaluated in any prior camsirubicin clinical trial.
To date, no drug-related cardiotoxicity has been observed with camsirubicin treatment as evaluated by the industry standard left-ventricular ejection fraction (LVEF). This compares favorably to the well-documented dose-restricting cardiotoxicity experienced with doxorubicin treatment, the current first-line treatment for ASTS.
Only 17% of camsirubicin patients in the trial have experienced low grade hair loss; another 8% have experienced >50% hair loss. This compares favorably to the approximately 50% of doxorubicin treated patients in recent ASTS clinical trials reporting some amount of hair loss, with the majority of these patients experiencing >50% hair loss.
Only 8% of camsirubicin patients in the trial have experienced low grade mild oral mucositis. This compares favorably to the roughly 35-40% of doxorubicin treated patients in recent ASTS clinical trials that experienced mild-to-severe oral mucositis.
In addition to the initial Sarcoma Oncology Research Center clinical trial site in Santa Monica, CA, Monopar recently welcomed a second clinical trial site with Dr. Lee Cranmer and the Sarcoma Clinic at the Fred Hutchinson Cancer Center/University of Washington in Seattle, WA.
"We are thrilled to partner with Monopar in exploring camsirubicin in patients facing ASTS. So far, camsirubicin has demonstrated a favorable safety profile at up to the 520 mg/m2 dose level assessed to date," said Dr. Cranmer. "Further escalation of camsirubicin dosing will allow us to confirm its favorable safety profile and explore preliminary evidence of camsirubicin’s clinical activity in advanced sarcoma patients. While only randomized trials will be able to confirm superiority of camsirubicin over doxorubicin, camsirubicin provides hope that we may finally be able to supersede doxorubicin, a drug in use since its approval in 1974, despite its serious drawbacks. Monopar’s continuing efforts to improve ASTS therapy also demonstrate their commitment to changing the treatment landscape for ASTS patients, a population with well-recognized and serious unmet need."
Further information about this actively enrolling, open-label, dose-escalation Phase 1b clinical trial is available at www.ClinicalTrials.gov under study identifier NCT 05043649.
About Camsirubicin
Camsirubicin is a novel, proprietary analog of the widely used cancer drug doxorubicin. It has been previously investigated in ASTS patients in a Phase 1 and a single-arm Phase 2 clinical trial. In these studies, no camsirubicin-treated patients developed the irreversible cardiotoxicity common to doxorubicin at higher cumulative doses. The most frequent adverse event observed in the Phase 1 study was neutropenia, which was mitigated in the Phase 2 study using prophylactic G-CSF. Based on encouraging clinical results from prior clinical trials, the current Phase 1b trial is designed to test camsirubicin at progressively higher doses than previously administered while using concomitant prophylactic G-CSF to prevent neutropenia.
About Soft Tissue Sarcoma
Soft tissue sarcomas (STS) are a diverse type of cancer that typically develop in the connective tissue of the body. According to the American Cancer Society, in 2021, an estimated 13,460 new STS cases were diagnosed in the U.S. alone, with about 5,350 dying from their disease. These tend to be the advanced cases; those with sarcomas that are unresectable and/or have metastasized. The average life expectancy from time of diagnosis for those patients with advanced disease (ASTS) is about 12 to 15 months. Doxorubicin is the current standard of care in the 1st-line setting for ASTS, and has been for decades, since there have been no 1st-line therapeutic advancements that have improved overall survival for this patient population.