Immunization of human hepatitis E viruses conferred protection against challenge by a camel hepatitis E virus.

Abstract:

:Dromedary camel hepatitis E virus is a novel HEV that belongs to the family Hepeviridae, and is classified as genotype 7 HEV (HEV-7). Since HEV-7 is transmitted from camels to humans and causes acute hepatitis E, this virus is a non-negligible pathogen for zoonosis, and a vaccine against HEV-7 infection is urgently needed. Here, we first intravenously inoculated HEV-7 to rhesus monkeys to explore the susceptibility, and we established an animal model. We then used virus-like particles (VLPs) of HEV-1 (HEV-1 VLPs) and HEV-3 (HEV-3 VLPs), a candidate hepatitis E vaccine, to intramuscularly inoculate rhesus monkeys. The monkeys elicited IgG antibody titers as high as >1:102,400 against heterologous HEV-7 without any adjuvants. The HEV-1 VLPs and HEV-3 VLPs-immunized monkeys were challenged intravenously with HEV-7, and they were protected completely from the infection, demonstrating that these VLPs could be a usable vaccine against HEV-7 infection. We also observed that HEV-7-infected rhesus monkeys did not show any liver damage during these experiments. Further efforts are necessary to establish an animal model for investigation of the pathogenesis of hepatitis E caused by HEV-7 infection.

journal_name

Vaccine

journal_title

Vaccine

authors

Guo Y,Yang F,Xu X,Feng M,Liao Y,He Z,Takeda N,Muramatsu M,Li Q,Li TC

doi

10.1016/j.vaccine.2020.09.036

subject

Has Abstract

pub_date

2020-10-27 00:00:00

pages

7316-7322

issue

46

eissn

0264-410X

issn

1873-2518

pii

S0264-410X(20)31196-8

journal_volume

38

pub_type

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