Corvus Pharmaceuticals Provides Updates on Mupadolimab (Anti-CD73) Programs in Oncology and Infectious Disease
Announces results published online in medRxiv in 40 patients from COVID-19 randomized controlled study, which showed primary and secondary endpoints trend toward more favorable outcome for mupadolimab treated patients vs. placebo
COVID-19 study immune response data found to be consistent with proposed mechanism
Oncology Phase 1b/2 clinical trial enrolling patients with head and neck cancers and patients with lung cancer; data anticipated at SITC meeting in November
Corvus is developing mupadolimab as a therapeutic for oncology indications and for infectious disease, starting with COVID-19. Today the Company announced results from its Phase 3 clinical trial of mupadolimab for COVID-19, which have been published online at medRxiv.org. The results, which cover 40 patients that were enrolled in the trial prior to its voluntary discontinuation, suggest improvement in the primary and key secondary endpoints in patients treated with single doses of mupadolimab at 2mg/kg and 1mg/kg compared to placebo. No drug related adverse events were reported in the trial.
“We believe the results from our Phase 3 Covid trial show the potential for a dose response effect on the primary endpoint of time to respiratory failure or death for the 2mg/kg and 1mg/kg mupadolimab cohorts compared to placebo. Secondary endpoints also favored the cohorts receiving mupadolimab. Most interestingly, antiviral responses in the 2mg/kg cohort trended higher across all variants tested, including delta. Cross reactivity to the delta variant is of interest as patients were enrolled prior to its emergence as the dominant variant in the United States,” said
Mupadolimab also is currently being studied in a Phase 1b/2 clinical study in patients with HPV+ oropharyngeal cancers and non small cell lung cancers (NSCLC) that have failed previous treatment with anti-PD-1 therapy and chemotherapy. Data from the Phase 1b/2 clinical study has been accepted for presentation at the
“Mupadolimab is one of the most studied anti-CD73 antibodies and is uniquely positioned with a potential dual mechanism, B cell activation and inhibition of immunosuppressive adenosine production,” said
Mupadolimab for COVID-19 Trial Results
This was a randomized, double blind placebo-controlled trial design. In July, Corvus discontinued the clinical trial, which had planned to enroll approximately 1,000 patients, due to positive trends exhibited by COVID-19 vaccines in lowering serious infection and hospitalizations at that time. The discontinuation was not related to any safety or efficacy issues observed in study patients and occurred prior to the recent surge in COVID-19 cases and before the dominant emergence of the delta variant. Of the 40 patients enrolled prior to the discontinuation, 15 received the mupadolimab 2mg/kg dose, 14 received the mupadolimab 1mg/kg dose, and 11 received placebo. Treatment arms were well balanced, except for the 2mg/kg cohort, which had patients with more severe disease on admission with 60% on non-invasive ventilation or high flow oxygen devices, compared to 7% in the 1mg/kg cohort and 27% in the placebo cohort. Data from the three cohorts remained blinded until the final analysis.
The primary endpoint of the clinical trial was the proportion of patients progressing to respiratory failure or death during the 28 days after dosing. In the 2mg/kg cohort, 93.3% of patients were alive and free from respiratory failure, compared to 85.7% in the 1mg/kg cohort and 81.1% in the placebo. The results in the placebo control group were in line with results reported in other randomized trials. In addition, positive trends favoring mupadolimab treatment compared to placebo were seen for all the key secondary endpoints, including time to clinical improvement, time to sustained clinical improvement and time to hospital discharge.
|Mupadolimab 2mg/kg and 1mg/kg vs. placebo
(all received standard of care treatment)
||2 mg/kg + SOC
|1 mg/kg + SOC
|Placebo + SOC
|Free from Respiratory Failure or Death (%)||93.3||85.7||81.1|
|Median Days to Improvement (95% CI)||7.0 (4-9)||5.5 (3-14)||11.0 (2-14)|
|Median Days Sustained Improve (95% CI)||8.0 (4-12)||6.0 (3-14)||11.0 (2-21)|
|Median Days to Discharge (95% CI)||6.0 (4-12)||4.0 (2-5)||7.0 (2-12)|
The results also included anti-viral antibody responses for 26 patients for which pre-treatment and day 28 blood serum are available (8 from the 1mg/kg cohort, 11 from the 2mg/kg cohort and 7 from the placebo cohort). Serum titers in the 2mg/kg cohort appeared to trend higher against the original COVID-19 strain and variants (alpha (B.1.1.7), beta (B.1.351), gamma (P.1) and delta (B.1.617.2), with several patients exhibiting very high titers. Patients in the 2mg/kg cohort demonstrated higher cross-reactivity with the beta, gamma and delta variants compared to 1mg/kg and placebo.
About Corvus Pharmaceuticals
Mupadolimab (CPI-006) is an investigational, potent humanized monoclonal antibody that is designed to react with a specific site on CD73. In preclinical studies, it has demonstrated immunomodulatory activity resulting in activation of lymphocytes, induction of antibody production from B cells and effects on lymphocyte trafficking. While there are other anti-CD73 antibodies and small molecules in development for treatment of cancer, such agents react with a different region of CD73. Mupadolimab is designed to react with a region of the molecule that acts to stimulate B cells and block production of immunosuppressive adenosine. Mupadolimab is being studied in combination with pembrolizumab in a Phase 1/1b study in patients with advanced HPV+ (human papilloma virus) head and neck cancers. It is postulated that the activation of B cells will enhance immunity to viral antigens within the tumors of these patients, leading to improved clinical outcomes.
This press release contains forward-looking statements, including statements related to the potential safety and efficacy of mupadolimab, CPI-818 and ciforadenant, the Company’s ability and our Chinese partner,
Chief Financial Officer
Source: Corvus Pharmaceuticals, Inc.