Selecta Biosciences Synthetic Vaccine Particles Instrumental in Breakthrough Research on Mucosal Vaccines
Selecta Biosciences has announced a publication in the prestigious journal Science describing the use of SVP to create a novel vaccine technology designed to target mucosal tissues. For many chronic and serious infectious diseases that thrive in mucosa, conventional vaccine approaches have not proven effective for reasons now elucidated in the publication. The new research, by Selecta’s founders, Professors Ulrich von Andrian and Omid Farokhzad at Harvard Medical School and Robert Langer at Massachusetts Institute of Technology further demonstrates preclinical proof-of-concept for an SVP product to prevent Chlamydia trachomatis infections.
“There are several examples where conventional vaccines exacerbated infections in human clinical trials, including Chlamydia and RSV,” said Ulrich von Andrian, Mallinckrodt Professor of Immunopathology at Harvard Medical School and the co-founder of Selecta who led this study. “For the case of Chlamydia, we now have a mechanistic explanation for the failure of traditional vaccines combined with an SVP-based vaccination strategy that can overcome these challenges and create a vaccine with the potential to engender the desired robust immunoprotection.”
Selecta has exclusively licensed the technology and know-how surrounding these novel SVP mucosal vaccines, complementing the extensive intellectual property estate around the company’s SVP vaccines and immunotherapies. Novel mucosal vaccines based on the SVP platform could have broad therapeutic potential for the prevention of mucosal infections, including sexually transmitted diseases, such as Chlamydia trachomatis and Gonococcus, as well as serious lung infections, such as respiratory syncytial virus (RSV).
“The demonstration of protective immunity in a humanized model for Chlamydia infections is a real breakthrough,” said Werner Cautreels, President and CEO of Selecta Biosciences. “Consistent with our company’s strategy for infectious disease indications, we will actively seek value-adding partners with whom to develop and commercialize SVP for mucosal vaccines.”
By attaching an SVP optimized for immune boosting to an inactive Chlamydia pathogen, mice with an implanted human immune system, known as BLT mice, were, for the first time ever, durably protected from infection upon challenge, while conventional vaccine approaches caused disease exacerbation. SVP are designed to stay intact until taken up by dendritic cells (DC), immune cells that are essential for long-term immune defense. In the Science publication, researchers provided insights into the mechanism of action of vaccines in mucosal infections, showing that only SVPs activated the population of dendritic cells that surveil mucosal tissue for infections, while other vaccine constructs did not meaningfully activate these critical dendritic cells.
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