title: Visualizing the dynamic behavior of poliovirus plus-strand RNA in living host cells.
abstract: Dynamic analysis of viral nucleic acids in host cells is important for understanding virus-host interaction. By labeling endogenous RNA with molecular beacon, we have realized the direct visualization of viral nucleic acids in living host cells and have studied the dynamic behavior of poliovirus plus-strand RNA. Poliovirus plus-strand RNA was observed to display different distribution patterns in living Vero cells at different post-infection time points. Real-time imaging suggested that the translocation of poliovirus plus-strand RNA is a characteristic rearrangement process requiring intact microtubule network of host cells. Confocal-FRAP measurements showed that 49.4 +/- 3.2% of the poliovirus plus-strand RNA molecules diffused freely (with a D-value of 9.6 +/- 1.6 x 10(-10) cm2/s) within their distribution region, while the remaining (50.5 +/- 2.9%) were almost immobile and moved very slowly only with change of the RNA distribution region. Under the electron microscope, it was found that virus-induced membrane rearrangement is microtubule-associated in poliovirus-infected Vero cells. These results reveal an entrapment and diffusion mechanism for the movement of poliovirus plus-strand RNA in living mammalian cells, and demonstrate that the mechanism is mainly associated with microtubules and virus-induced membrane structures.
authors.affiliation: State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences Wuhan 430071, China.
authors.forename: Zong-Qiang
authors.initials: ZQ
authors.lastname: Cui
authors.forename: Zhi-Ping
authors.initials: ZP
authors.lastname: Zhang
authors.forename: Xian-En
authors.initials: XE
authors.lastname: Zhang
authors.forename: Ji-Kai
authors.initials: JK
authors.lastname: Wen
authors.forename: Ya-Feng
authors.initials: YF
authors.lastname: Zhou
authors.forename: Wei-Hong
authors.initials: WH
authors.lastname: Xie
mesh_terms: D000818:Animals; D001692:Biological Transport; D002522:Chlorocebus aethiops; D003593:Cytoplasm / Q000821:virology; D022162:Cytoplasmic Vesicles / Q000648:ultrastructure; D004058:Diffusion; D036681:Fluorescence Recovery After Photobleaching; D017404:In Situ Hybridization, Fluorescence; D018613:Microscopy, Confocal; D008870:Microtubules / Q000502:physiology / Q000648:ultrastructure; D015345:Oligonucleotide Probes; D017955:Poliovirus / Q000235:genetics*; D012367:RNA, Viral / Q000032:analysis* / Q000378:metabolism; D014709:Vero Cells
chemical_list: D015345:Oligonucleotide Probes; D012367:RNA, Viral