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Safety and immunogenicity of AGS-v PLUS, a mosquito saliva peptide vaccine against arboviral diseases: A randomized, double-blind, placebo-controlled Phase 1 trialResearch in context

Safety and immunogenicity of AGS-v PLUS, a mosquito saliva peptide vaccine against arboviral diseases: A randomized, double-blind, placebo-controlled Phase 1 trialResearch in context

Authors :
DeAnna J. Friedman-Klabanoff
Megan Birkhold
Mara T. Short
Timothy R. Wilson
Claudio R. Meneses
Joshua R. Lacsina
Fabiano Oliveira
Shaden Kamhawi
Jesus G. Valenzuela
Sally Hunsberger
Allyson Mateja
Gregory Stoloff
Olga Pleguezuelos
Matthew J. Memoli
Matthew B. Laurens
Source :
EBioMedicine, Vol 86, Iss , Pp 104375- (2022)
Publication Year :
2022
Publisher :
Elsevier, 2022.

Abstract

Summary: Background: Immunity to mosquito salivary proteins could provide protection against multiple mosquito-borne diseases and significantly impact public health. We evaluated the safety and immunogenicity of AGS-v PLUS, a mosquito salivary peptide vaccine, in healthy adults 18–50 years old. Methods: We conducted a randomized, double-blind, placebo-controlled Phase 1 study of AGS-v PLUS administered subcutaneously on Days 1 and 22 at the Center for Vaccine Development and Global Health, Baltimore, MD, USA. Participants were block randomized 1:1:1:1:1 to two doses saline placebo, two doses AGS-v PLUS, AGS-v PLUS/ISA-51 and saline placebo, two doses AGS-v PLUS/ISA-51, or two doses AGS-v PLUS/Alhydrogel. Primary endpoints were safety (all participants receiving ≥1 injection) and antibody and cytokine responses (all participants with day 43 samples), analysed by intention to treat. Findings: Between 26 August 2019 and 25 February 2020, 51 participants were enrolled and randomized, 11 into the single dose AGS-v PLUS/ISA-51 group and ten in other groups. Due to COVID-19, 15 participants did not return for day 43 samplings. Participants experienced no treatment-emergent or serious adverse events. All solicited symptoms in 2/10 placebo recipients and 22/41 AGS-v PLUS recipients after dose one and 1/10 placebo recipients and 22/41 AGS-v PLUS recipients after dose two were mild/moderate except for one severe fever the day after vaccination (placebo group). Only injection site pain was more common in vaccine groups (15/51 after dose 1 and 11/51 after dose 2) versus placebo. Compared to placebo, all vaccine groups had significantly greater fold change in anti-AGS-v PLUS IgG and IFN-ɣ from baseline. Interpretation: AGS-v PLUS had favourable safety profile and induced robust immune responses. Next steps will determine if findings translate into clinical efficacy against mosquito-borne diseases. Funding: UK Department of Health and Social Care.

Details

Language :
English
ISSN :
23523964
Volume :
86
Issue :
104375-
Database :
Directory of Open Access Journals
Journal :
EBioMedicine
Publication Type :
Academic Journal
Accession number :
edsdoj.89b6b091e15a4a17a4f907d55c0bdeed
Document Type :
article
Full Text :
https://doi.org/10.1016/j.ebiom.2022.104375