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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Gen+Virol
2014 ; 95
(Pt 6
): 1307-1319
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Human pegivirus RNA is found in multiple blood mononuclear cells in vivo and
serum-derived viral RNA-containing particles are infectious in vitro
#MMPMID24668525
Chivero ET
; Bhattarai N
; Rydze RT
; Winters MA
; Holodniy M
; Stapleton JT
J Gen Virol
2014[Jun]; 95
(Pt 6
): 1307-1319
PMID24668525
show ga
Human pegivirus (HPgV; previously called GB virus C/hepatitis G virus) has
limited pathogenicity, despite causing persistent infection, and is associated
with prolonged survival in human immunodeficiency virus-infected individuals.
Although HPgV RNA is found in and produced by T- and B-lymphocytes, the primary
permissive cell type(s) are unknown. We quantified HPgV RNA in highly purified
CD4(+) and CD8(+) T-cells, including naïve, central memory and effector memory
populations, and in B-cells (CD19(+)), NK cells (CD56(+)) and monocytes (CD14(+))
using real-time reverse transcription-PCR. Single-genome sequencing was performed
on viruses within individual cell types to estimate genetic diversity among cell
populations. HPgV RNA was present in CD4(+) and CD8(+) T-lymphocytes (nine of
nine subjects), B-lymphocytes (seven of ten subjects), NK cells and monocytes
(both four of five). HPgV RNA levels were higher in naïve (CD45RA(+)) CD4(+)
cells than in central memory and effector memory cells (P<0.01). HPgV sequences
were highly conserved among subjects (0.117±0.02 substitutions per site; range
0.58-0.14) and within subjects (0.006±0.003 substitutions per site; range
0.006-0.010). The non-synonymous/synonymous substitution ratio was 0.07,
suggesting a low selective pressure. Carboxyfluorescein succinimidyl ester
(CFSE)-labelled HPgV RNA-containing particles precipitated by a commercial
exosome isolation reagent delivered CSFE to uninfected monocytes, NK cells and T-
and B-lymphocytes, and HPgV RNA was transferred to PBMCs with evidence of
subsequent virus replication. Thus, HPgV RNA-containing serum particles including
microvesicles may contribute to delivery of HPgV to PBMCs in vivo, explaining the
apparent broad tropism of this persistent human RNA virus.