Invivyd Announces Positive Initial Data from Ongoing Phase 1 Clinical Trial of VYD222, a Monoclonal Antibody Candidate in Development for the Prevention of Symptomatic COVID-19 in Immunocompromised People
- Category: Antibodies
- Published on Friday, 23 June 2023 15:10
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- VYD222 has been generally well-tolerated at all dose levels, with no serious adverse events reported to date
- As predicted by pre-clinical in vitro testing, early serum samples from the first, lowest dose cohort showed strong neutralization activity against Omicron XBB.1.5, one of the dominant SARS-CoV-2 variants circulating globally
- Initial Phase 1 data help support anticipated rapid transition to a pivotal clinical trial
WALTHAM, MA, USA I June 22, 2023 I Invivyd, Inc. (Nasdaq: IVVD), a clinical-stage biopharmaceutical company on a mission to protect the vulnerable from serious viral infectious diseases, today announced positive initial data from its ongoing Phase 1 healthy volunteer clinical trial of its lead investigational monoclonal antibody (mAb) candidate, VYD222. VYD222 is a broadly neutralizing, half-life extended mAb candidate in development for the prevention of symptomatic COVID-19 in vulnerable populations, such as immunocompromised people.
Initial Phase 1 data show that a single administration of VYD222 was generally well-tolerated at all three dose levels tested with no serious adverse events (SAEs) reported to date. At the lowest VYD222 dose tested (1500 mg), geometric mean serum neutralizing titers were 3245.1 (95% CI: 1882.5, 5594.0) against Omicron XBB.1.5 at Day 7, with a geometric mean 38.87-fold rise (95% CI: 10.3, 146.8) from baseline to Day 7 (n=8). Omicron XBB.1.5 and other related XBB sublineages are currently the dominant SARS-CoV-2 variants circulating globally. VYD222 was designed for broad activity and has previously demonstrated in vitro neutralizing activity against prior circulating SARS-CoV-2 variants and current variants of concern, including Omicron sublineages up to and through XBB.1.5. Higher VYD222 dose levels tested in the Phase 1 clinical trial are designed to provide greater protection from any potential loss of neutralization activity as SARS-CoV-2 evolves over time.
Analysis of the serum neutralizing activity from samples collected at different timepoints across all dose cohorts is ongoing, as is detailed pharmacokinetic analysis and modeling. Invivyd intends to use these analyses, combined with published clinical outcome data from prior clinical trials of vaccines and mAbs for the prevention of symptomatic COVID-19, including data from its Phase 2/3 clinical trial of adintrevimab for the prevention of COVID-19 (EVADE), to inform VYD222 dose selection for its pivotal clinical trial.
“We are very encouraged by our initial Phase 1 clinical trial data, including the strong serum neutralizing titers against Omicron XBB.1.5, which align with our preclinical in vitro testing and are in a similar range to the titers shared at the recent VRBPAC meeting from investigational XBB-containing mRNA vaccines administered to adults who are not on immunosuppressive treatment,” said Dave Hering, chief executive officer of Invivyd. “Based on previously published clinical data from randomized controlled clinical trials, we believe that monoclonal antibodies directed against the receptor binding domain of the SARS-CoV-2 spike protein offer an attractive safety profile, even at higher doses, and that strong serum neutralization activity would be predictive of clinical benefit. I look forward to continuing to work with urgency to move VYD222 into a pivotal clinical trial and, if authorized, to immunocompromised people in need.”
“With COVID-19 continuing to threaten millions of the most vulnerable people in our communities, such as people receiving chemotherapy or other immunosuppressive drugs, we are pleased that the initial Phase 1 data support the potential for VYD222 to meet an urgent medical need,” said Pete Schmidt, M.D. M.Sc., chief medical officer of Invivyd. “Many immunocompromised people do not respond optimally to COVID-19 vaccination, and would benefit substantially from high-quality, immediate, and long-lasting protection from symptomatic COVID-19.”
Invivyd plans to utilize initial data from the Phase 1 VYD222 clinical trial to help support the anticipated rapid transition to a VYD222 pivotal clinical trial. Additionally, the company plans to present additional results from the Phase 1 clinical trial at an upcoming medical meeting.
About the Phase 1 Clinical Trial of VYD222
The ongoing VYD222 Phase 1 clinical trial is a randomized, blinded, placebo-controlled, dose-ranging trial that will evaluate the safety, pharmacokinetics, tolerability, and serum virus neutralizing activity of VYD222 in healthy adult volunteers (NCT05791318). The dose-ranging trial will evaluate three different doses of VYD222, each administered as a single IV push. All doses are designed to provide durability in the face of viral evolution and flexibility at the time of regulatory submission. In May 2023, Invivyd finished dosing all 30 participants in the trial; follow up is ongoing.
VYD222 is a broadly neutralizing, half-life extended monoclonal antibody (mAb) candidate in development for the prevention of symptomatic COVID-19 in vulnerable populations, such as immunocompromised people. Globally, there are millions of immunocompromised people, with an estimated 8-18 million in the U.S. alone, who may not adequately respond to COVID-19 vaccination, increasing their risk for severe outcomes from COVID-19. As of June 2023, there are no monoclonal antibodies authorized or approved in the U.S. for the prevention of symptomatic COVID-19.
VYD222 was designed for broad activity and has demonstrated in vitro neutralizing activity against previously circulating SARS-CoV-2 variants and current variants of concern, including Omicron sub-lineages up to and through XBB.1.5. VYD222 was engineered from adintrevimab, Invivyd’s investigational mAb that has a robust safety data package and demonstrated clinically meaningful results in global Phase 2/3 clinical trials for both the prevention and treatment of COVID-19. The company believes the adintrevimab clinical data have the potential to support accelerated development of VYD222.
About the Phase 2/3 Clinical Trial of Adintrevimab for the Prevention of COVID-19 (EVADE)
EVADE was a multi-center, double-blind, placebo-controlled, randomized Phase 2/3 clinical trial of adintrevimab for post-exposure prophylaxis (PEP) and pre-exposure prophylaxis (PrEP) of symptomatic COVID-19 in SARS-CoV-2 naïve, unvaccinated individuals (NCT04859517). Eighty-eight sites randomized 2,582 participants in 8 countries. Eligible participants were adults (≥18 years) and adolescents (12 to <18 years) whose circumstances placed them at risk of acquiring SARS-CoV-2 infection. The PrEP cohort included participants whose advanced age (≥55 years) or health status placed them at risk for developing severe COVID-19 or COVID-19 complications, such as chronic cardiopulmonary disease, diabetes, obesity, or an immune compromised state. The efficacy portion of EVADE was conducted during the emergence and global spread of SARS-CoV-2 variants Delta and Omicron BA.1/BA.1.1.
Invivyd, Inc. (Nasdaq: IVVD) is a biopharmaceutical company on a mission to rapidly and perpetually deliver antibody-based therapies that protect vulnerable people from the devastating consequences of circulating viral threats, beginning with SARS-CoV-2. Invivyd’s technology works at the intersection of evolutionary virology, predictive modeling, and antibody engineering, and is designed to identify high-quality, long-lasting antibodies with the potential to resist viral escape. The company is generating a robust pipeline of product candidates which could be used in prevention or treatment of serious viral diseases, starting with COVID-19 and expanding into influenza and other high-need indications. Visit https://invivyd.com/ to learn more.
U.S. Food and Drug Administration (FDA) Center for Biologics Evaluation and Research (CBER) 182nd Meeting of the Vaccines and Related Biological Products (VRBPAC) Advisory Committee Meeting on June 15, 2023: https://www.fda.gov/media/169539/download