20 November 2020 - - Bamlanivimab (LY-CoV555) 700 mg, a human antibody developed through Canada-based AbCellera's collaboration with US-based Eli Lilly and Company (NYSE: LLY), was granted authorization by Health Canada under the Interim Order Respecting the Importation, Sale and Advertising of Drugs for Use in Relation to COVID-19, the company said.

Bamlanivimab, which has been shown in clinical trials to reduce viral load, symptoms, and hospitalizations, is authorized for the treatment of adults and pediatric patients 12 years of age or older with mild to moderate COVID-19 who weigh at least 40 kg and who are at high risk of progressing to severe COVID-19 illness and/or hospitalization.

Details regarding the interim authorization can be found here.

Bamlanivimab received emergency use authorization from the US Food and Drug Administration on November 9, 2020.

Both the Canadian interim authorization and American EUA are based on data from BLAZE-1, a randomized, double-blind placebo-controlled Phase 2 study in patients with recently diagnosed mild to moderate COVID-19 in the outpatient setting.

Bamlanivimab was the first monoclonal antibody therapy for COVID-19 to enter human testing in the United States and is currently undergoing multiple Phase 1, 2, and 3 clinical trials.

Bamlanivimab was discovered from the blood of a recovered COVID-19 patient by AbCellera, scientists at the Vaccine Research Center at National Institute of Allergy and Infectious Diseases (NIAID) and Lilly.

AbCellera's COVID-19 response was based on capabilities developed over the past two years as part of the Defense Advanced Research Projects Agency (DARPA) Pandemic Prevention Platform program.

The goal of P3 is to establish a robust technology platform for pandemic response capable of developing field-ready medical countermeasures within 60 days of isolation of an unknown viral pathogen.

Bamlanivimab is a recombinant, neutralizing human IgG1 monoclonal antibody directed against the spike protein of SARS-CoV-2.

It is designed to block viral attachment and entry into human cells, thus neutralizing the virus, potentially treating COVID-19.

Bamlanivimab emerged from the collaboration between Lilly and AbCellera to create antibody therapies for the prevention and treatment of COVID-19.

Lilly scientists rapidly developed the antibody in less than three months after it was discovered by AbCellera and the scientists at the National Institute of Allergy and Infectious Diseases (NIAID) Vaccine Research Center.

It was identified from a blood sample taken from one of the first US patients who recovered from COVID-19.

Lilly has successfully completed a Phase 1 study of bamlanivimab in hospitalized patients with COVID-19 (NCT04411628).

A Phase 2 study in people recently diagnosed with COVID-19 in the ambulatory setting (BLAZE-1, NCT04427501) is ongoing. A Phase 3 study of bamlanivimab for the prevention of COVID-19 in residents and staff at long-term care facilities (BLAZE-2, NCT04497987) is also ongoing.

In addition, bamlanivimab is being tested in the National Institutes of Health-led ACTIV-2 study in ambulatory COVID-19 patients.

BLAZE-1 (NCT04427501) is a randomized, double-blind, placebo-controlled Phase 2 study designed to assess the efficacy and safety of bamlanivimab alone or in combination with a second antibody for the treatment of symptomatic COVID-19 in the outpatient setting.

To be eligible, patients were required to have mild or moderate symptoms of COVID-19 as well as a positive SARS-CoV-2 test based on a sample collected no more than three days prior to drug infusion.

The monotherapy arms of the trial enrolled mild to moderate recently diagnosed COVID-19 patients, studying three doses of bamlanivimab (700 mg, 2800 mg, and 7000 mg) versus placebo.

The primary outcome measure for the completed arms of the BLAZE-1 trial was change from baseline to day 11 in SARS-CoV-2 viral load.

Additional endpoints include the percentage of participants who experience COVID-related hospitalization, ER visit or death from baseline through day 29, as well as safety.

The study is ongoing with additional treatment arms. Across all treatment arms, the trial will enroll over 800 participants.

Data from the monotherapy arms of BLAZE-1 were published in the New England Journal of Medicine.