» Articles » PMID: 35313504

Biodistribution and Environmental Safety of a Live-attenuated YF17D-vectored SARS-CoV-2 Vaccine Candidate

Abstract

New platforms are needed for the design of novel prophylactic vaccines and advanced immune therapies. Live-attenuated yellow fever vaccine YF17D serves as a vector for several licensed vaccines and platform for novel candidates. On the basis of YF17D, we developed an exceptionally potent COVID-19 vaccine candidate called YF-S0. However, use of such live RNA viruses raises safety concerns, such as adverse events linked to original YF17D (yellow fever vaccine-associated neurotropic disease [YEL-AND] and yellow fever vaccine-associated viscerotropic disease [YEL-AVD]). In this study, we investigated the biodistribution and shedding of YF-S0 in hamsters. Likewise, we introduced hamsters deficient in signal transducer and activator of transcription 2 (STAT2) signaling as a new preclinical model of YEL-AND/AVD. Compared with YF17D, YF-S0 showed improved safety with limited dissemination to brain and visceral tissues, absent or low viremia, and no shedding of infectious virus. Considering that yellow fever virus is transmitted by mosquitoes, any inadvertent exposure to the live recombinant vector via mosquito bites is to be excluded. The transmission risk of YF-S0 was hence compared with readily transmitting YF-Asibi strain and non-transmitting YF17D vaccine, with no evidence for productive infection of mosquitoes. The overall favorable safety profile of YF-S0 is expected to translate to other vaccines based on the same YF17D platform.

Citing Articles

Development of a fully automated chemiluminescent immunoassay for the quantitative and qualitative detection of antibodies against African swine fever virus p72.

Wang L, Li D, Zeng D, Wang S, Wu J, Liu Y Microbiol Spectr. 2024; 12(10):e0080924.

PMID: 39145655 PMC: 11448198. DOI: 10.1128/spectrum.00809-24.


Comparative Biodistribution Study of Baculoviral and Adenoviral Vector Vaccines against SARS-CoV-2.

Lee H, Chun J, Kim S, Aleksandra N, Lee C, Yoon D J Microbiol Biotechnol. 2023; 34(1):185-191.

PMID: 37830223 PMC: 10840461. DOI: 10.4014/jmb.2308.08042.


YF17D-vectored Ebola vaccine candidate protects mice against lethal surrogate Ebola and yellow fever virus challenge.

Lemmens V, Kelchtermans L, Debaveye S, Chiu W, Vercruysse T, Ma J NPJ Vaccines. 2023; 8(1):99.

PMID: 37433816 PMC: 10336040. DOI: 10.1038/s41541-023-00699-7.


Live-attenuated YF17D-vectored COVID-19 vaccine protects from lethal yellow fever virus infection in mouse and hamster models.

Ma J, Bright Yakass M, Jansen S, Malengier-Devlies B, Van Looveren D, Sanchez-Felipe L EBioMedicine. 2022; 83:104240.

PMID: 36041265 PMC: 9419561. DOI: 10.1016/j.ebiom.2022.104240.

References
1.
Danet L, Beauclair G, Berthet M, Moratorio G, Gracias S, Tangy F . Midgut barriers prevent the replication and dissemination of the yellow fever vaccine in Aedes aegypti. PLoS Negl Trop Dis. 2019; 13(8):e0007299. PMC: 6709925. DOI: 10.1371/journal.pntd.0007299. View

2.
Garcia-Beltran W, Lam E, St Denis K, Nitido A, Garcia Z, Hauser B . Multiple SARS-CoV-2 variants escape neutralization by vaccine-induced humoral immunity. Cell. 2021; 184(9):2372-2383.e9. PMC: 7953441. DOI: 10.1016/j.cell.2021.03.013. View

3.
Sanchez-Felipe L, Vercruysse T, Sharma S, Ma J, Lemmens V, Van Looveren D . A single-dose live-attenuated YF17D-vectored SARS-CoV-2 vaccine candidate. Nature. 2020; 590(7845):320-325. DOI: 10.1038/s41586-020-3035-9. View

4.
de Lataillade L, Vazeille M, Obadia T, Madec Y, Mousson L, Kamgang B . Risk of yellow fever virus transmission in the Asia-Pacific region. Nat Commun. 2020; 11(1):5801. PMC: 7669885. DOI: 10.1038/s41467-020-19625-9. View

5.
Pulendran B . Learning immunology from the yellow fever vaccine: innate immunity to systems vaccinology. Nat Rev Immunol. 2009; 9(10):741-7. DOI: 10.1038/nri2629. View