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FDA grants emergency use authorization to anti-SARS-COV-2 mAb Evusheld

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On December 8, 2021, the U.S. Food and Drug Administration issued an emergency use authorization (EUA) for AstraZeneca’s Evusheld (tixagevimab co-packaged with cilgavimab and administered together) for the pre-exposure prophylaxis (prevention) of COVID-19 in certain adults and pediatric individuals (12 years of age and older weighing at least 40 kilograms [about 88 pounds]).

Evusheld, comprising the combination of 2 human anti-SARS-CoV-2 IgG1k antibodies, was derived from B cells from convalescent patients after infection with SARS-CoV-2. Discovered by Vanderbilt University Medical Center, the antibodies bind to distinct sites on the SARS-CoV-2 spike protein. These antibodies were licensed to AstraZeneca in June 2020, and then engineered with mutations that extend half-life (YTE) and reduce Fc receptor and complement C1q binding (L234F, L235E, P331S). The primary data supporting the EUA came from the PROVENT clinical study, which is assessing the safety and efficacy of a single 300 mg dose of AZD7442 compared to placebo for the prevention of COVID-19. At the primary analysis, the study data showed AZD7442 reduced the risk of developing symptomatic COVID-19 by 77% (95% CI: 46, 90), compared to placebo.

Evusheld is the 4th anti-SARS-CoV-2 antibody product granted an EUA. See our COVID-19 Biologics Tracker for information about other anti-SARS-CoV-2 antibodies.

Anti-SARS-CoV-2 antibody therapeutics Ronapreve and Regkirona approved in the EU

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On November 11, 2021, the European Medicines Agency’s human medicines committee recommended authorizing anti-SARS-CoV-2 antibody therapeutics Ronapreve (casirivimab/imdevimab) and Regkirona (regdanvimab) for COVID-19.

  • The Committee recommended authorizing Ronapreve for treating COVID-19 in adults and adolescents (from 12 years of age and weighing at least 40 kilograms) who do not require supplemental oxygen and who are at increased risk of their disease becoming severe. Ronapreve can also be used for preventing COVID-19 in people aged 12 years and older weighing at least 40 kilograms. The company that applied for authorization of Ronapreve was Roche Registration GmbH.
  • The Committee recommended authorizing Regkirona for treating adults with COVID-19 who do not require supplemental oxygen and who are also at increased risk of their disease becoming severe. The applicant for Regkirona was Celltrion Healthcare Hungary Kft.

On November 12, 2021, the European Commission approved both products.

Learn about ImmunoPrecise Antibodies’ efforts to stay ahead of the virus on June 17!

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Join us on Thursday June 17, 8am PT/ 11am ET / 5pm CET for

 

 

Staying ahead of the virus: From a multispecies discovery strategy to highly efficacious, clinically suitable multi-antibody cocktails targeting SARS-CoV-2.

featuring:

Ilse Roodink, PhD, Scientific Director, ImmunoPrecise Antibodies Europe and
Debby Kruijsen, PhD, General Manager, ImmunoPrecise Antibodies Europe

Whereas vaccines significantly contribute to halting transmission of SARS-CoV-2, they are not universally effective. Therapeutic antibodies can fill this gap to efficiently combat SARS-CoV-2. Obviously, long-lasting efficacy of anti-viral approaches heavily depends on the ability to protect against virus variants. As a multi-targeting strategy reduces the risk of mutagenic escape, we have isolated a diversified pool of anti-spike protein antibodies by leveraging our expertise to generate antibody libraries across multiple discovery platforms in different species, to eventually formulate a sensible therapeutic cocktail. A broad range of in vitro characterizations was applied to gain early insight into the epitope landscape and functional characteristics as well as developability profiles. This comprehensive, high-throughput characterization of the obtained lead candidate pool guided the rational combination of high value antibodies into multi-membered cocktails that unlock synergistic effects, significantly boosting neutralization potency in vitro.

To accelerate further clinical development of our prioritized antibody cocktails, 2 individual components were subjected to in silico modeling-guided light molecular optimization to minimize liabilities, while in parallel, in vivo efficacy evaluation in a hamster challenge model validated efficient prevention and treatment of SARS-CoV-2 infection following administration of our prioritized antibody cocktails. Although we anticipate that a multi-targeting strategy is the best solution to reduce mutagenic risk escape, we continuously analyze binding of the antibodies of our lead pool for reactivity towards emerging SARS-CoV-2 variants empirically. To date, we screened our prioritized antibody cocktails towards spike protein of the S. African (B.1.351 lineage), Brazilian (P.1 lineage), UK (B.1.1.7 lineage), New York (B.1.526 lineage) and Californian (B.1.429 lineage) strains and confirmed retained binding. Our pandemic preparedness is further strengthened by the readily accessible, diverse pool of antibodies that we generated, which provides enormous possibilities for plug-and-play cocktails to address future SARS-CoV-2 variants.

Click here to register for this free event!

EUA issued for anti-SARS-CoV-2 sotrovimab

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On March 27, 2021, the U.S. Food and Drug Administration issued an emergency use authorization (EUA) for sotrovimab (VIR-7831; GSK4182136) for the treatment of mild-to-moderate COVID-19 in adults and pediatric patients with positive results of direct SARS-CoV-2 viral testing and who are at high risk for progression to severe COVID-19, including hospitalization or death. The EUA was issued to GlaxoSmithKline.

Sotrovimab, a human anti-SARS-CoV2 antibody, is being evaluated in a Phase 1/2/3 randomized, double-blind, placebo-controlled clinical trial in non-hospitalized adults with mild-to-moderate COVID-19 symptoms and a positive SARS-CoV-2 test result. The EUA is based on an interim analysis of results for 583  patients in the study, 291 and 292  of whom received sotrovimab or placebo, respectively, within five days of onset of COVID-19 symptoms. The primary endpoint was progression of COVID-19 (defined as hospitalization for greater than 24 hours for acute management of any illness or death from any cause) through day 29. Hospitalization or death occurred in 21 (7%) patients who received placebo compared to 3 (1%) patients treated with sotrovimab.

Sotrovimab is administered as a 500 milligram single dose given intravenously over 30 minutes by health care providers.

Prior to the authorization of sotrovimab, FDA issued EUAs for the treatment of mild-to-moderate COVID-19 for two combinations of anti-SARS-CoV-2 monoclonal antibodies. The combination of casirivimab and imdevimab was authorized in November 2020 and the combination of bamlanivimab and etesevimab was authorized in February 2021. In addition, Celltrion’s anti-SARS-CoV-2 antibody regdanvimab (CT-P59; Regkirona) received authorization in South Korea in February 2021.

More than 20 additional anti-SARS-CoV-2 monoclonal antibodies are undergoing evaluation in clinical studies. Of these, 7 monotherapies or combinations are in late-stage clinical studies, including ADG20 (Adagio Therapeutics) and AZD7442 (AstraZeneca). The Antibody Society will continue to track these investigational antibodies and report progress in the future.

AIRR Community and Tsinghua University discuss Chinese research using AIRR-seq data to study adaptive immune response in COVID-19 patients

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A meeting focusing on Chinese researchers’ use of AIRR-seq data to study the adaptive immune response – especially in COVID-19 patients – was held recently by the AIRR Community and Tsinghua University.

The purpose of this co-organized meeting was to expose AIRR-seq researchers in China to the philosophy and tools developed by the AIRR Community and help integrate researchers from all over the world through the AIRR Community.

Although collaboration and sharing data internationally is complicated and difficult, this successful meeting was an important step in forming the relationships necessary for overcoming many of these challenges.

Tsinghua University is a major research university in Beijing and a member of the C9 League of Chinese universities. Since its establishment exactly 110 years ago, it has produced many notable leaders in science, engineering, politics, business, academia, and culture. The university is ranked as the 15th best university in the world in the QS World University Rankings and No.1 in Asia by the Asia University Rankings and the U.S. News and World Report.

The meeting followed a hybrid format, combining online lectures by AIRR Community members in the US and Europe in conjunction with an in-person meeting in Shenzhen, China that was organized by Professor Xiao Liu of Tsinghua University’s Shenzhen campus.

The in-person, all-day meeting was held on December 6, 2020 in Shenzhen, which corresponded to Saturday evening December 5 in North America.

The full meeting agenda can be found on the meeting web page and the meeting recording has been posted on the AIRR-C YouTube Channel.