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Replication kinetics of coxsackievirus A16 in human rhabdomyosarcoma cells


Coxsackievirus A16 (CVA16), together with enterovirus type 71 (EV71), is responsible for most cases of hand, foot and mouth disease (HFMD) worldwide. Recent findings suggest that the recombination between CVA16 and EV71, and the co-circulation of these two viruses may have contributed to the increase of HFMD cases in China over the past few years. It is therefore important to further understand the virology, epidemiology, virus-host interactions and host pathogenesis of CVA16. In this study, we describe the viral kinetics of CVA16 in human rhabdomyosarcoma (RD) cells by analyzing the cytopathic effect (CPE), viral RNA replication, viral protein expression, viral RNA package and viral particle secretion in RD cells. We show that CVA16 appears to first attach, uncoat and enter into the host cell after adsorption for 1 h. Later on, CVA16 undergoes rapid replication from 3 to 6 h at MOI 1 and until 9 h at MOI 0.1. At MOI 0.1, CVA16 initiates a secondary infection as the virions were secreted before 9 h p.i. CPE was observed after 12 h p.i., and viral antigen was first detected at 6 h p.i. at MOI 1 and at 9 h p.i. at MOI 0.1. Thus, our study provides important information for further investigation of CVA16 in order to better understand and ultimately control infections with this virus.

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Correspondence to Wei Kong or Chunlai Jiang.

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Foundation item: Partly supported by the National Natural Science Foundation of China (No. 20872048).

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Jin, J., Han, M., Xu, L. et al. Replication kinetics of coxsackievirus A16 in human rhabdomyosarcoma cells. Virol. Sin. 27, 221–227 (2012).

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  • Coxsackievirus A16 (CVA16)
  • Hand, foot and mouth disease (HFMD)
  • Viral kinetics
  • qRT-PCR
  • Western blotting