TY - JOUR
T1 - In Vivo Treatment with Insulin-like Growth Factor 1 Reduces CCR5 Expression on Vaccine-Induced Activated CD4+ T-Cells
AU - Bissa, Massimiliano
AU - Galli, Veronica
AU - Schifanella, Luca
AU - Vaccari, Monica
AU - Rahman, Mohammad Arif
AU - Gorini, Giacomo
AU - Binello, Nicolò
AU - Sarkis, Sarkis
AU - Gutowska, Anna
AU - Silva de Castro, Isabela
AU - Doster, Melvin N.
AU - Moles, Ramona
AU - Ferrari, Guido
AU - Shen, Xiaoying
AU - Tomaras, Georgia D.
AU - Montefiori, David C.
AU - N’guessan, Kombo F.
AU - Paquin-Proulx, Dominic
AU - Kozlowski, Pamela A.
AU - Venzon, David J.
AU - Choo-Wosoba, Hyoyoung
AU - Breed, Matthew W.
AU - Kramer, Joshua
AU - Franchini, Genoveffa
N1 - Publisher Copyright:
© 2023 by the authors.
PY - 2023/11
Y1 - 2023/11
N2 - 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. We found that IGF-1 changed the hierarchy of V1/V2 epitope recognition and decreased both ADCC specific for helical V2 and efferocytosis. Remarkably, IGF-1 also reduced the expression of CCR5 on vaccine-induced CD4+ gut-homing T-cells, compensating for its negative effect on ADCC and efferocytosis and resulting in equivalent vaccine efficacy (71% with IGF-1 and 69% without).
AB - 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. We found that IGF-1 changed the hierarchy of V1/V2 epitope recognition and decreased both ADCC specific for helical V2 and efferocytosis. Remarkably, IGF-1 also reduced the expression of CCR5 on vaccine-induced CD4+ gut-homing T-cells, compensating for its negative effect on ADCC and efferocytosis and resulting in equivalent vaccine efficacy (71% with IGF-1 and 69% without).
KW - CCR5
KW - CD4
KW - HIV
KW - IGF-1
KW - insulin-like growth factor
KW - SIV
KW - T-cells
UR - http://www.scopus.com/inward/record.url?scp=85178267922&partnerID=8YFLogxK
U2 - 10.3390/vaccines11111662
DO - 10.3390/vaccines11111662
M3 - Article
AN - SCOPUS:85178267922
SN - 2076-393X
VL - 11
JO - Vaccines
JF - Vaccines
IS - 11
M1 - 1662
ER -