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Development of T Follicular Helper Cell-independent Nanoparticle Vaccines for SARS-CoV-2 or HIV-1 by Targeting ICOSL

Abstract

T helper cells, particularly T follicular helper (T) cells, are essential for the neutralizing antibody production elicited by pathogens or vaccines. However, in immunocompromised individuals, the inefficient support from T cells could lead to limited protection after vaccine inoculation. Here we showed that the conjugation of inducible T cell costimulatory (ICOS) onto the nanoparticle, together with immunogen, significantly enhanced the immune response of the vaccines specific for SARS-CoV-2 or human immunodeficiency virus type-1 (HIV-1) in T-deficient mice. Further studies indicated that ICOSL on B cells was triggered by ICOS binding, subsequently activated the PKCβ signaling pathway, and enhanced the survival and proliferation of B cells. Our findings revealed that the stimulation of ICOS-ICOSL interaction by adding ICOS on the nanoparticle vaccine significantly substitutes the function of T cells to support B cell response, which is significant for the immunocompromised people, such as the elderly or HIV-1-infected individuals.

Citing Articles

ICOSLG Is Associated with Anti-PD-1 and Concomitant Antihistamine Treatment Response in Advanced Melanoma.

Mallardo D, Fordellone M, Ottaviano M, Marano G, Vitale M, Mallardo M Int J Mol Sci. 2024; 25(22).

PMID: 39596506 PMC: 11594639. DOI: 10.3390/ijms252212439.

References
1.
Collier D, Ferreira I, Kotagiri P, Datir R, Lim E, Touizer E . Age-related immune response heterogeneity to SARS-CoV-2 vaccine BNT162b2. Nature. 2021; 596(7872):417-422. PMC: 8373615. DOI: 10.1038/s41586-021-03739-1. View

2.
Hu H, Wu X, Jin W, Chang M, Cheng X, Sun S . Noncanonical NF-kappaB regulates inducible costimulator (ICOS) ligand expression and T follicular helper cell development. Proc Natl Acad Sci U S A. 2011; 108(31):12827-32. PMC: 3150902. DOI: 10.1073/pnas.1105774108. View

3.
Crotty S . T follicular helper cell differentiation, function, and roles in disease. Immunity. 2014; 41(4):529-42. PMC: 4223692. DOI: 10.1016/j.immuni.2014.10.004. View

4.
Banga R, Procopio F, Noto A, Pollakis G, Cavassini M, Ohmiti K . PD-1(+) and follicular helper T cells are responsible for persistent HIV-1 transcription in treated aviremic individuals. Nat Med. 2016; 22(7):754-61. DOI: 10.1038/nm.4113. View

5.
Hedl M, Lahiri A, Ning K, Cho J, Abraham C . Pattern recognition receptor signaling in human dendritic cells is enhanced by ICOS ligand and modulated by the Crohn's disease ICOSLG risk allele. Immunity. 2014; 40(5):734-46. PMC: 4157904. DOI: 10.1016/j.immuni.2014.04.011. View