Lilly starts phase 3 clinical trial with Baricitinib for hospitalized Covid-19 patients

Data will complement ongoing NIAID trial and investigator-initiated trials

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Eli Lilly and Company announced that the first patient had been enrolled in Phase 3 randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of Baricitinib, an oral JAK1/JAK2 inhibitor licensed from Incyte, in hospitalized adults with Covid-19. Baricitinib, marketed as OLUMIANT, is approved in 70 countries as a treatment for adults with moderately to severely active rheumatoid arthritis (RA).

Lilly expects to enroll 400 patients in the trial, with data expected in the next few months. The study will be conducted in the US, Europe and Latin America and includes patients hospitalized with SARS-CoV-2 infection who have at least one elevated marker of inflammation but do not require invasive mechanical ventilation at study entry.

In Covid-19 infection, increased disease severity can be associated with a hyperinflammatory state. It is hypothesized that through JAK1 and JAK2 inhibition, Baricitinib may reduce the cytokine storm associated with the complications of this infection. In addition, Baricitinib may have a role in inhibiting the host cell proteins that assist in viral reproduction, reducing the ability of infected cells to make more viruses. A manuscript detailing this mechanism of action of Baricitinib in Covid-19 has been accepted for publication by EMBO molecular medicine.

Lilly’s study’s primary endpoint is the proportion of patients who die or require non-invasive ventilation or high-flow oxygen or invasive mechanical ventilation by Day 28 in patients treated with 4 mg of Baricitinib daily (with background therapy) compared to placebo (with background therapy). Patients will receive Baricitinib or placebo for up to 14 days or until discharge from the hospital. Key secondary outcomes of this study include the proportion of patients with clinical improvement at different time points, time to recovery, duration of hospitalization, number of ventilator-free days and mortality over 28 days.

“Lilly is committed to fighting this global pandemic. This includes testing whether existing medicines, including Baricitinib, could help treat the complications of Covid-19 in patients,” said Patrik Jonsson, Lilly senior vice president and president of Lilly Bio-Medicines. “This randomized controlled study is an important step in our understanding of Baricitinib as a potential Covid-19 treatment.”

“While the approach to addressing Covid-19 continues to evolve, we’re pleased to partner with Lilly in this trial to assess baricitinib’s potential in the fight against Covid-19 and look forward to learning more about its impact on patients,” said Patrick Milligan, managing director of Community Health Network in Indianapolis, US, one of the first sites participating in the study.

“Following upon the success of remdesivir to treat moderate to severe Covid-19, hospitalized patients are still in need of novel approaches to reduce mortality,” said Vincent C Marconi, professor of medicine and global health at Emory University School of Medicine and Emory’s Rollins School of Public Health. “Several ongoing studies with Baricitinib will provide necessary data about this treatment that may combine antiviral activity with suppression of cytokine storm.”

The data from Lilly’s trial will complement data from the study of baricitinib with remdesivir in the second phase of the Adaptive Covid-19 Treatment Trial (ACTT-2) run by the National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health (NIH). This study – which enrolled its first patient last month – assesses the efficacy and safety of the combination of a 4-mg daily dose of baricitinib plus remdesivir, compared to remdesivir.

Lilly is also supporting select ongoing multisite and single-site investigator-initiated trials in Europe and North America for hospitalized patients with Covid-19 infections. These studies by academic and government institutions will provide information on hundreds of additional patients treated with Baricitinib and either placebo or active comparators.

Should research efforts for Baricitinib in Covid-19 prove successful, Lilly will continue to create adequate supply to support both appropriate clinical and investigational use.

Studying Baricitinib in controlled trials is essential to characterize its potential benefits better and understand the safety of its use as a Covid-19 treatment. The US prescribing information for the approved use of Baricitinib for RA includes boxed warnings regarding the use of Baricitinib, including warnings about the risk for developing blood clots and severe infections.

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