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2018 ; 115
(30
): E7139-E7148
Nephropedia Template TP
gab.com Text
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English Wikipedia
Superinfection and cure of infected cells as mechanisms for hepatitis C virus
adaptation and persistence
#MMPMID29987026
Ke R
; Li H
; Wang S
; Ding W
; Ribeiro RM
; Giorgi EE
; Bhattacharya T
; Barnard RJO
; Hahn BH
; Shaw GM
; Perelson AS
Proc Natl Acad Sci U S A
2018[Jul]; 115
(30
): E7139-E7148
PMID29987026
show ga
RNA viruses exist as a genetically diverse quasispecies with extraordinary
ability to adapt to abrupt changes in the host environment. However, the
molecular mechanisms that contribute to their rapid adaptation and persistence in
vivo are not well studied. Here, we probe hepatitis C virus (HCV) persistence by
analyzing clinical samples taken from subjects who were treated with a
second-generation HCV protease inhibitor. Frequent longitudinal viral load
determinations and large-scale single-genome sequence analyses revealed rapid
antiviral resistance development, and surprisingly, dynamic turnover of dominant
drug-resistant mutant populations long after treatment cessation. We fitted
mathematical models to both the viral load and the viral sequencing data, and the
results provided strong support for the critical roles that superinfection and
cure of infected cells play in facilitating the rapid turnover and persistence of
viral populations. More broadly, our results highlight the importance of
considering viral dynamics and competition at the intracellular level in
understanding rapid viral adaptation. Thus, we propose a theoretical framework
integrating viral and molecular mechanisms to explain rapid viral evolution,
resistance, and persistence despite antiviral treatment and host immune
responses.