(mPFS) for the 525 mg – 700 mg cohort was 6.2 months (95% CI 2.6 months - 7.5 months). There were 9 subjects dosed at 350 mg, mPFS was 2.2 months (95% CI 0.7 months - 12+ months). There was a meaningful PFS advantage at the higher doses when compared with the lower, 350 mg dose cohort.
Furthermore, the preliminary results of the leronlimab studies also showed similarity in the PFS outcomes of mTNBC patients treated with leronlimab + carboplatin compared to overall leronlimab treated population. Of the 28 subjects enrolled, 13 subjects received leronlimab + carboplatin treatment. The mPFS for leronlimab + carboplatin population was 3.9 months (95% CI 2.3 months - 6.0 months).
The subgroup analysis of PFS based on the individual subjects in each study were also reviewed. The mPFS for Phase 1b/2 study was 3.9 months (95% CI 2.3 months – 6.2 months), mPFS for the Compassionate Use study was 3.3 months (95% CI 1.3 months – 7.5 months), and mPFS for the Basket Study was 2.8 months (95% CI N/A).
Combined, the overall mPFS for all 28 patients treated with leronlimab in the population of mTNBC patients regardless of dosage, conjunction therapy type, brain or bone metastases that have failed more than one line of previous therapy was 4.1 months (95% CI 2.5 months – 7.0 months). The mean PFS was 3.7 ± 2.93 standard deviation (SD).
To explore the impact of leronlimab in the mTNBC patients’ disease progression, Overall Survival (OS) was analyzed in the same 28 subjects. The median OS (mOS) for leronlimab + carboplatin population was 12+ months (95% CI 5.4 months - 12+ months).
The mOS for the 350 mg cohort was 4.6 months (95% CI 1.1 months -12+ months). The mOS for the 525-700 mg cohort was 12+ months (95% CI 5.5 months – 12+ months).
The overall median OS for leronlimab treated population of mTNBC patients regardless of brain or bone metastases that have failed more than one line of previous therapy was 6.5 months (95% CI 5.0 months – 12+ months). The mean value for OS was 5.5 ±4.31 standard deviation (SD).
COVID-19 Clinical Developments
The Company has made the business decision to currently discontinue its investigation of leronlimab for the COVID-19 indications due to challenges in clinical enrollment in the severe/critical COVID-19 population, and the unclear path for regulatory approval of COVID-19 post-acute sequelae SARS-CoV-2 infection (PASC).
Corporate Developments
In June 2022, the Company concluded a private placement of common stock and warrants through a placement agent, selling approximately 50.7 million additional shares of common stock for gross proceeds of $12.9 million and net proceeds of $11.3 million. Refer to Note 6, Equity Awards and Warrants - Private Placement of Common Stock and Warrants through Placement Agent for details.
Effective July 9, 2022, Cyrus Arman, Ph.D. was appointed President, and Antonio Migliarese ceased his role as interim President. Dr. Arman previously held positions with a number of biotechnology companies, most recently serving as Chief Business Officer of Nimble Therapeutics, Inc., a company focused on engineering peptides. Prior to Nimble he was Vice President of Corporate Development and Strategy of NEUVOGEN, Inc., an 29mmune-oncology company, developing therapeutic whole cell cancer vaccines, from 2019 until 2021. Beginning in 2017, he served as co-founder and managing partner of BioVega Capital, LLC, a life sciences hedge fund. From 2014 through 2019, he served in a variety of strategy roles at Amgen (NASDAQ: AMGN), a leading independent biotechnology company, including as Director of Corporate Strategy and Global Director and Head of Competitive Intelligence and Strategy. Prior to Amgen he was a Principal at Deallus Consulting, a global lifesciences competitive strategy consulting firm. He received an M.S. degree in biomedical engineering and a Ph.D. in neuroscience from the University of Southern California and an M.B.A from the UCLA Anderson School of Management.
On August 24, 2022, Ryan Dunlap was appointed to the Company Board of Directors and was subsequently appointed chair of the Audit Committee. Mr. Dunlap has over 25 years’ experience in accounting, finance and operations leadership, developing significant expertise in strategy setting, improving operational efficiency and effectiveness, fundraising and investor relations, financial reporting and compliance, and risk management. Mr. Dunlap currently serves as the CFO of Gurobi Optimization, a private, equity backed software company offering customers decision intelligence solutions utilizing mathematical optimization, where he started in October 2019. Prior to that, he spent 7