Joseph Kim
Analyst · Bank of America. Please go ahead
Thank you, Ben. Good afternoon, and thank you for taking the time to join us for today's call. With COVID-19 rates surging again globally and then increasing number of breakthrough infections, Inovio recognizes the need for additional safe and effective first-line vaccines, particularly those which could offer potential boosting capabilities to combat the spread of the virus and emerging variants, including the rapidly spreading Delta variant. As an organization, we are committed to realize the potential that DNA medicines offer not only to address this present public health needs in response to the global pandemic, but more broadly across therapeutic areas. In the short time we have today, I want to spend most of our call reviewing Inovio's strategy to advance INO-4800 as a vaccine to be used globally as both a first-line vaccine and potentially a booster to prevent COVID-19 by leveraging key advantages of INO-4800 and Inovio's DNA Medicines platform. Specifically, the key advantages of our DNA Medicines platform include the ability to generate robust T-cells alongside neutralizing antibodies, which we believe will be crucial in mitigating against rising variants of concern. Our DNA medicines also have shown a favorable tolerability, transportability and thermostability profiles. These differentiators, which have been further validated through some of our recent publications and preprints, are widely acknowledged to be essential for ensuring that vaccines can be made accessible globally; a key concerns of regulators, countries and vaccine supply initiatives. This morning's announcement is a wonderful example of that. Inovio and our partner Advaccine received regulatory allowance in China for two clinical trials investigating heterologous boosting with INO-4800. These trials, which are being done through trial sponsor Advaccine working together with Sinovac, will evaluate the safety, tolerability and immunogenicity of heterologous prime-boost sequential immunizations using INO-4800 and CoronaVac, an inactivated COVID-19 vaccine developed by Sinovac and validated by the World Health Organization for emergency use. Both trials which will be conducted in China are anticipated to begin this fall and will involve healthy adult subjects 18 years of age or older. With the increased challenge of the highly contagious Delta variant and other variants of concern around the world, our work with Advaccine and Sinovac is more important than ever. If approved, we believe INO-4800 will be well-positioned to serve the vaccine needs of the global community as both a primary and a booster vaccine due to its due to its tolerability, balanced cross-reactive immune responses, and strong thermostability profile that does not require cold or ultra-cold-chain transport. Helping to enable these trials, Inovio along with Advaccine and Sinovac recently completed cross prime-boost preclinical animal tests that evaluated the immune-boosting abilities of INO-4800 and CoronaVac. Results demonstrated that the prime-boost strategy can stimulate high level of antigen-specific binding antibodies, neutralizing antibodies by both live-virus neutralization assay and a ACE receptor-blocking assay, as well as antigen-specific T-cell immune responses. We're really excited to see the continued development of heterologous prime-boost strategies for COVID-19 vaccines with different mechanisms of action, as this is likely to become an important component of real-world vaccine use and may provide an efficient solution that synergistically enhances the immunogenicity of vaccines. We believe this concept will be a key factor in fighting against the current increasing global COVID-19 cases and variants of concerns, and expanding the potential market for INO-4800. We're especially excited and proud to expand our partnership with Advaccine to explore heterologous prime-boosting using INO-4800 to potentially protect more people against COVID-19 by serving as a potentially safer and more immune-enhancing booster vaccine not only to the inactivated vaccine, but perhaps with other viral vector and mRNA vaccines. We look forward to sharing data from these trials in the future. Before we go further, I would like to reiterate Inovio's focus on starting and executing our global INNOVATE Phase 3 trials in countries outside the US. More specifically, our primary focus is getting this trial initiated next month to enroll healthy men and non-pregnant women 18 years and older across several countries, concentrating on Latin America, Asia, in addition to expanding the trial to Africa. As it relates to the United States, Inovio does not plan on enrolling any subjects in the US for the INNOVATE Phase 3 trial. We will engage the FDA on a formal lifting of the partial clinical hold as a part of our long-term plans to pursue a BLA approval in the US once INO-4800 efficacy is demonstrated in the global INNOVATE Phase 3 trial. Returning to the changing COVID pandemic landscape. In the second quarter, the company released a preprint -- as a preprint results showing that INO-4800 provided broad cross-reactive immune responses in humans against VOC. In particular, the study showed that the T-cell responses generated by INO-4800 vaccination were fully maintained against the Alpha, Beta, and Gamma variants when compared to the T-cell responses to the original wildtype strain. Subsequent to this published work, and something that Dr. Kate Broderick will discuss later, INO-4800 vaccination was also found to maintain a similar level of T-cell responses against the Delta variant when compared to the T-cell responses to the original wildtype strain, while it showed a similar level of reduced neutralizing antibody activity against the Delta variant by other vaccines. In parallel with INO-4800, Inovio is also developing a novel Pan-COVID second-generation vaccine candidate, INO-4802, which is specifically designed to protect against current and future variants of concern. INO-4802 could potentially offer broad boosting capabilities in addition to an initial vaccination regimen with INO-4800 and/or other first-generation vaccines, including both adenovirus and mRNA-based platforms. Both INO-4800 and INO-4802 are able to be used as a primary vaccine, as well as both homologous and heterologous boosting. With that, I'd like to turn the call now to Dr. Anza Mammen, who is leading our global Phase 3 trial for INO-4800, for an update on the progress. Anza?