Evidence map›Paper›PMID 21742757›Full record

ArticleNucleic acids research2011

Ultra-deep pyrosequencing analysis of the hepatitis B virus preCore region and main catalytic motif of the viral polymerase in the same viral genome.

Maria Homs, Maria Buti, Josep Quer, Rosendo Jardí, Melanie Schaper, David Tabernero, Israel Ortega, Alex Sanchez, Rafael Esteban, Francisco Rodriguez-Frias

Open access · goldAbstract read
In one paragraph

Article in Nucleic acids research, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
5.0field-weighted citation impact, top 4% 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

21 citing papers in PubMed, 44 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

10 authors at 4 institutions in 2 countries.

Maria HomsCentro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas, Instituto Carlos III Corsega 180, 08036, Barcelona, Spain.
Maria Buti
Josep Quer
Rosendo Jardí
Melanie Schaper
David Tabernero
Israel Ortega
Alex Sanchez
Rafael Esteban
Francisco Rodriguez-Frias
Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas · ESVall d'Hebron Institut de Recerca · ESUniversitat Autònoma de Barcelona · ESHebron University · PS

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Hepatitis B virus (HBV) pregenomic RNA contains a hairpin structure (ε) located in the preCore region, essential for viral replication. ε stability is enhanced by the presence of preCore variants and ε is recognized by the HBV polymerase (Pol). Mutations in the retrotranscriptase domain (YMDD) of Pol are associated with treatment resistance. The aim of this study was to analyze the preCore region and YMDD motif by ultra-deep pyrosequencing (UDPS). To evaluate the UDPS error rate, an internal control sequence was inserted in the amplicon. A newly developed technique enabled simultaneous analysis of the preCore region and Pol in the same viral genome, as well as the conserved sequence of the internal control. Nucleotide errors in HindIII yielded a UDPS error rate <0.05%. UDPS study confirmed the possibility of simultaneous detection of preCore and YMDD mutations, and demonstrated the complexity of the HBV quasispecies and cooperation between viruses. Thermodynamic stability of the ε signal was found to be the main constraint for selecting main preCore mutations. Analysis of ε-signal variability suggested the essential nature of the ε structural motif and that certain nucleotides may be involved in ε signal functions.

Indexed as

Genome, ViralAdolescentAdultBase PairingBase SequenceCatalytic DomainCodonDeoxyribonuclease HindIIIDNA Mutational AnalysisGene Products, polHepatitis B virusHumansMaleMiddle AgedMolecular Sequence DataMutationCodonDeoxyribonuclease HindIIIGene Products, polhepatitis B virus X proteinP protein, Hepatitis B virusRNA, ViralTrans-ActivatorsViral Regulatory and Accessory Proteins

Identifiers

PMID21742757
PMCPMC3201856
OpenAlexW2122158190

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

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.