Massimiliano Bissa, Veronica Galli, Luca Schifanella, Monica Vaccari, Mohammad Arif Rahman, Giacomo Gorini, Nicolò Binello, Sarkis Sarkis, Anna Gutowska, Isabela Silva de Castro, Melvin N Doster, Ramona Moles, Guido Ferrari, Xiaoying Shen, Georgia D Tomaras, David C Montefiori, Kombo F N'guessan, Dominic Paquin-Proulx, Pamela A Kozlowski, David J Venzon, Hyoyoung Choo-Wosoba, Matthew W Breed, Joshua Kramer, Genoveffa Franchini
At the heart of the DNA/ALVAC/gp120/alum vaccine's efficacy in the absence of neutralizing antibodies is a delicate balance of pro- and anti-inflammatory immune responses that effectively decreases the risk of SIVmac251 acquisition in macaques. Vaccine efficacy is linked to antibodies recognizing the V2 helical conformation, DC-10 tolerogenic dendritic cells eliciting the clearance of apoptotic cells via efferocytosis, and CCR5 downregulation on vaccine-induced gut homing CD4+ cells. RAS activation is also linked to vaccine efficacy, which prompted the testing of IGF-1, a potent inducer of RAS activation with vaccination...
October 30, 2023: Vaccines