RRC ID 81360
Author Passoni G, Langevin C, Palha N, Mounce BC, Briolat V, Affaticati P, De Job E, Joly JS, Vignuzzi M, Saleh MC, Herbomel P, Boudinot P, Levraud JP.
Title Imaging of viral neuroinvasion in the zebrafish reveals that Sindbis and chikungunya viruses favour different entry routes.
Journal Dis Model Mech
Abstract Alphaviruses, such as chikungunya virus (CHIKV) and Sindbis virus (SINV), are vector-borne pathogens that cause acute illnesses in humans and are sometimes associated with neuropathies, especially in infants and elderly patients. Little is known about their mechanism of entry into the central nervous system (CNS), even for SINV, which has been used extensively as a model for viral encephalopathies. We previously established a CHIKV infection model in the optically transparent zebrafish larva; here we describe a new SINV infection model in this host. We imaged in vivo the onset and progression of the infection caused by intravenous SINV inoculation. Similar to that described for CHIKV, infection in the periphery was detected early and was transient, whereas CNS infection started at later time points and was persistent or progressive. We then tested the possible mechanisms of neuroinvasion by CHIKV and SINV. Neither virus relied on macrophage-mediated transport to access the CNS. CHIKV, but not SINV, always infects endothelial cells of the brain vasculature. By contrast, axonal transport was much more efficient with SINV than CHIKV, both from the periphery to the CNS and between neural tissues. Thus, the preferred mechanisms of neuroinvasion by these two related viruses are distinct, providing a powerful imaging-friendly system to compare mechanisms and prevention methods of encephalopathies.
Volume 10(7)
Pages 847-857
Published 2017-7-1
DOI 10.1242/dmm.029231
PII dmm.029231
PMID 28483796
PMC PMC5536907
MeSH Alphavirus Infections / pathology Alphavirus Infections / virology Animals Axonal Transport Blood-Brain Barrier / pathology Blood-Brain Barrier / virology Chikungunya Fever / pathology Chikungunya Fever / virology Chikungunya virus / physiology* Endothelial Cells / pathology Endothelial Cells / virology Imaging, Three-Dimensional* Larva / virology Macrophages / metabolism Microvessels / pathology Nervous System / pathology Nervous System / virology* Sindbis Virus / physiology* Tropism / physiology Virus Internalization* Virus Replication / physiology Zebrafish
Resource
Zebrafish UAS:RFP