Evidence map›Paper›PMID 21966381›Full record

ArticlePloS one2011

Genetic heterogeneity of hepatitis C virus in association with antiviral therapy determined by ultra-deep sequencing.

Akihiro Nasu, Hiroyuki Marusawa, Yoshihide Ueda, Norihiro Nishijima, Ken Takahashi, Yukio Osaki, Yukitaka Yamashita, Tetsuro Inokuma, Takashi Tamada, Takeshi Fujiwara and 3 more

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed
6.7field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

44 citing papers in PubMed, 88 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

13 authors at 6 institutions in 1 country.

Akihiro NasuDepartment of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
Hiroyuki Marusawa
Yoshihide Ueda
Norihiro Nishijima
Ken Takahashi
Yukio Osaki
Yukitaka Yamashita
Tetsuro Inokuma
Takashi Tamada
Takeshi Fujiwara
Fumiaki Sato
Kazuharu Shimizu
Tsutomu Chiba
Kyoto University · JPKyoto Pharmaceutical University · JPJapanese Red Cross Society Wakayama Medical Center · JPKobe City Medical Center General Hospital · JPOsaka Red Cross Hospital · JPTakatsuki Red Cross Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND AND

aimsThe hepatitis C virus (HCV) invariably shows wide heterogeneity in infected patients, referred to as a quasispecies population. Massive amounts of genetic information due to the abundance of HCV variants could be an obstacle to evaluate the viral genetic heterogeneity in detail.

methodsUsing a newly developed massive-parallel ultra-deep sequencing technique, we investigated the viral genetic heterogeneity in 27 chronic hepatitis C patients receiving peg-interferon (IFN) α2b plus ribavirin therapy.

resultsUltra-deep sequencing determined a total of more than 10 million nucleotides of the HCV genome, corresponding to a mean of more than 1000 clones in each specimen, and unveiled extremely high genetic heterogeneity in the genotype 1b HCV population. There was no significant difference in the level of viral complexity between immediate virologic responders and non-responders at baseline (p = 0.39). Immediate virologic responders (n = 8) showed a significant reduction in the genetic complexity spanning all the viral genetic regions at the early phase of IFN administration (p = 0.037). In contrast, non-virologic responders (n = 8) showed no significant changes in the level of viral quasispecies (p = 0.12), indicating that very few viral clones are sensitive to IFN treatment. We also demonstrated that clones resistant to direct-acting antivirals for HCV, such as viral protease and polymerase inhibitors, preexist with various abundances in all 27 treatment-naïve patients, suggesting the risk of the development of drug resistance against these agents.

conclusionUse of the ultra-deep sequencing technology revealed massive genetic heterogeneity of HCV, which has important implications regarding the treatment response and outcome of antiviral therapy.

Indexed as

AgedAntiviral AgentsBase SequenceDNA, ComplementaryDrug Therapy, CombinationFemaleGenetic HeterogeneityGenome, ViralHepacivirusHepatitis CHigh-Throughput Nucleotide SequencingHumansInterferon-alphaInterferon alpha-2MaleMiddle AgedAntiviral AgentsDNA, ComplementaryInterferon-alphaInterferon alpha-2peginterferon alfa-2bPolyethylene GlycolsRecombinant ProteinsRibavirinRNA, Viral

Identifiers

PMID21966381
PMCPMC3178558
OpenAlexW2166323995

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LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.