Monopar Announces Promising Preclinical Data for its MNPR-101 Radiopharma Program Targeting Advanced Cancers

On February 22, 2024 Monopar Therapeutics Inc. (Nasdaq: MNPR), a clinical-stage biopharmaceutical company focused on developing innovative treatments for cancer patients, reported promising preclinical imaging and therapeutic efficacy data for its MNPR-101 radiopharmaceutical program (Press release, Monopar Therapeutics, FEB 22, 2024, View Source [SID1234640395]). This novel first-in-class radiopharma program targets cancers expressing the urokinase plasminogen activator receptor (uPAR), which include a majority of all triple-negative breast, colorectal, and pancreatic cancers.

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MNPR-101 Conjugated to Imaging Radioisotope

Maximizing the dose delivered to the tumor relative to normal tissue is of paramount importance in radiopharmaceutical therapy. Figure 1 below shows the before and after optimization of MNPR-101-Zr, Monopar’s radiopharmaceutical imaging agent for advanced solid tumors expressing uPAR. Monopar’s in-house radiopharmaceutical development team was able to significantly increase tumor uptake of MNPR-101-Zr while minimizing uptake in healthy tissue, as shown in this preclinical positron emission tomography (PET) sequential imaging time-series. The high specificity and durable tumor uptake are evident in the After Optimization panel below.

Monopar recently announced it received Human Research Ethics Committee (HREC) clearance in Australia to commence a Phase 1 dosimetry clinical trial for MNPR-101-Zr in advanced cancer patients. "As we prepare to launch this clinical trial, we are encouraged by the significant, precise, and durable accumulation we are seeing in tumors and the corresponding therapeutic benefit in preclinical human tumor xenograft models," said Andrew Cittadine, Monopar’s Chief Operating Officer. "We are aiming to present these promising preclinical results at an upcoming scientific meeting."