- 150 healthy adult and elderly participants expected to be enrolled in Phase 1 study
- COVID-19 vaccine candidate to be evaluated in combination with GSK’s pandemic adjuvant system and Dynavax’s CpG 1018 adjuvant following promising preclinical study results
- Preliminary safety and immunogenicity results expected in August 2020
- Global Phase 2b/3 vaccine efficacy study is in planning stage, targeting initiation by year-end 2020
Perth, AUSTRALIA and Chengdu, CHINA – 19 June 2020 – Clover Biopharmaceuticals today announced that the first participants have been dosed in the Phase 1 first-in-human study evaluating the company’s COVID-19 S-Trimer subunit vaccine candidate (SCB-2019), which is based on Clover’s proprietary Trimer-Tag© vaccine technology platform. Preliminary safety and immunogenicity results for this Phase 1 study are expected in August 2020. In parallel, the planning for a global Phase 2b/3 vaccine efficacy trial has begun, with initiation targeted by year-end 2020.
The Phase I study will evaluate two adjuvant systems – GSK’s (London Stock Exchange) pandemic adjuvant system as well as Dynavax’s (Nasdaq: DVAX) CpG 1018 adjuvant combined with alum. Clover has previously announced research collaborations with both GSK and Dynavax respectively. An adjuvant is added to some vaccines to enhance the immune response, thereby creating a stronger and longer lasting immunity against infections than the vaccine alone. The use of an adjuvant is of particular importance in a pandemic situation since it can reduce the amount of antigen required per dose, allowing more vaccine doses to be produced and made available to more people. Based on preclinical results demonstrating the ability of adjuvanted SCB-2019 to elicit neutralizing antibodies in multiple animal species, the collaborations with GSK and Dynavax have been expanded to include clinical supply of the adjuvants to Clover.
The Phase I clinical trial is a randomized, double-blind, placebo-controlled study to assess the safety, reactogenicity, and immunogenicity of SCB-2019 at multiple dose levels. Each SCB-2019 dose level will be evaluated with and without adjuvant. The study is being conducted at Linear Clinical Research in Perth, Australia and will enroll approximately 90 healthy adult participants and 60 healthy elderly participants. The trial and Clover’s COVID-19 vaccine program is being supported by the funding and collaboration with the Coalition for Epidemic Preparedness Innovations (CEPI).
Joshua Liang, Chief Executive Officer of Clover and co-inventor of COVID-19 S-Trimer vaccine candidate said:
“We are pleased to achieve this significant milestone for our COVID-19 vaccine candidate, as the entire Clover team and our collaborators around the world have been working nonstop since late-January on this important program for the world. More than ever, Clover remains focused on developing a safe, effective and accessible COVID-19 vaccine at a scale that could potentially impact the course of the pandemic globally.”
Dr. Peng Liang, Founder and Chairman of Clover and inventor of Trimer-Tag© technology added:
“Dosing the first participants in this Phase I study brings us one step closer to developing a safe and effective vaccine for COVID-19 and our clear objective of producing and supplying our COVID-19 vaccine to the world. As a China headquartered company, Clover is proud to achieve this important milestone which is the result of global collaboration across several continents against a common enemy – COVID-19.”
In early-2020, upon knowing the genomic DNA sequence of the newly identified SARS-CoV-2 virus, which causes a disease named COVID-19, Clover scientists started designing the viral spike (S)-protein construct and completed its gene synthesis. Utilizing its patented Trimer-Tag© technology, Clover has produced a COVID-19 S-Trimer subunit vaccine candidate that resembles the native trimeric viral spike via a rapid mammalian cell-culture based expression system. Having one of the largest in-house, commercial-scale cGMP biomanufacturing capabilities in China, Clover could potentially rapidly scale-up and produce large-quantities of a new coronavirus vaccine.
