A murine model of coxsackievirus A16 infection for anti-viral evaluation.

Abstract:

:Coxsackievirus A16 (CA16) is one of the main causative agents of hand, foot and mouth disease (HFMD), which is a common infectious disease in children. CA16 infection may lead to severe nervous system damage and even death in humans. However, study of the pathogenesis of CA16 infection and development of vaccines and anti-viral agents are hindered partly by the lack of an appropriate small animal model. In the present study, we developed and characterized a murine model of CA16 infection. We show that neonatal mice are susceptible to CA16 infection via intraperitoneal inoculation. One-day-old mice infected with 2×10(6)TCID50 of CA16/SZ05 strain consistently exhibited clinical signs, including reduced mobility, and limb weakness and paralysis. About 57% of the mice died within 14days after infection. Significant damage in the brainstem, limb muscles and intestines of the infected mice in the moribund state was observed by histological examination, and the presence of CA16 in neurons of the brainstem was demonstrated by immunohistochemical staining with a CA16-specific polyclonal antibody, strongly suggesting the involvement of the central nervous system in CA16 infection. Analysis of virus titers in various organs/tissues collected at 3, 6 and 9days post-infection, showed that skeletal muscle was the major site of virus replication at the early stage of infection, while the virus mainly accumulated in the brain at the late stage. In addition, susceptibility of mice to CA16 infection was found to be age dependent. Moreover, different CA16 strains could exhibit varied virulence in vivo. Importantly, we demonstrated that post-exposure treatment with an anti-CA16 monoclonal antibody fully protected mice against lethal CA16 infection. Collectively, these results indicate the successful development of a CA16 infection mouse model for anti-viral evaluation.

journal_name

Antiviral Res

journal_title

Antiviral research

authors

Liu Q,Shi J,Huang X,Liu F,Cai Y,Lan K,Huang Z

doi

10.1016/j.antiviral.2014.02.015

subject

Has Abstract

pub_date

2014-05-01 00:00:00

pages

26-31

eissn

0166-3542

issn

1872-9096

pii

S0166-3542(14)00058-8

journal_volume

105

pub_type

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