Evidence map›Paper›PMID 29404449›Full record

ArticleHepatology communications2017

Resistance mutations of hepatitis B virus in entecavir-refractory patients.

Norie Yamada, Ryuichi Sugiyama, Sayuri Nitta, Asako Murayama, Minoru Kobayashi, Chiaki Okuse, Michihiro Suzuki, Kiyomi Yasuda, Hiroshi Yotsuyanagi, Kyoji Moriya and 3 more

Open access · goldAbstract read
In one paragraph

Article in Hepatology communications, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
1.6field-weighted citation impact, top 17% 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

8 citing papers in PubMed, 17 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 5 institutions in 2 countries.

Norie YamadaDepartment of Virology II National Institute of Infectious Diseases Tokyo Japan.
Ryuichi SugiyamaDepartment of Virology II National Institute of Infectious Diseases Tokyo Japan.
Sayuri NittaDepartment of Virology II National Institute of Infectious Diseases Tokyo Japan.
Asako MurayamaDepartment of Virology II National Institute of Infectious Diseases Tokyo Japan.
Minoru KobayashiDepartment of Internal Medicine Center for Liver Diseases, Seizankai Kiyokawa Hospital Tokyo Japan.
Chiaki OkuseDepartment of Internal Medicine Division of Gastroenterology and Hepatology, St. Marianna University School of Medicine Kanagawa Japan.
Michihiro SuzukiDepartment of Internal Medicine Division of Gastroenterology and Hepatology, St. Marianna University School of Medicine Kanagawa Japan.
Kiyomi YasudaDepartment of Internal Medicine Center for Liver Diseases, Seizankai Kiyokawa Hospital Tokyo Japan.
Hiroshi YotsuyanagiDivision of Infectious Diseases Advanced Clinical Research Center, Institute of Medical Science.
Kyoji MoriyaDepartment of Infection Control and Prevention Graduate School of Medicine.
Kazuhiko KoikeDepartment of Gastroenterology Graduate School of Medicine, The University of Tokyo Tokyo Japan.
Takaji WakitaDepartment of Virology II National Institute of Infectious Diseases Tokyo Japan.
Takanobu KatoDepartment of Virology II National Institute of Infectious Diseases Tokyo Japan.
National Institute of Infectious Diseases · JPNishikawa Hospital · JPSt. Marianna University School of Medicine · JPAdvanced Medical Research Institute · USThe University of Tokyo · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The emergence of resistance mutations in the reverse transcriptase gene of hepatitis B virus (HBV) is associated with treatment failure. Entecavir (ETV) is one of the most potent anti-HBV reagents; it has a very low resistance rate and is used as the first-line treatment for chronic hepatitis B. In this study, we isolated HBVs in 4 ETV-refractory patients (2 with viral breakthrough, 1 with partial virological response, and 1 with flare-up) and assessed ETV resistance using replication-competent 1.38-fold HBV genome-length molecular clones. The full genome sequences of infected HBVs in ETV-refractory patients were determined. The HBV molecular clones were generated with the patient-derived sequences. After transfection of these molecular clones into HepG2 cells, viral replications and ETV susceptibilities were evaluated by measuring the amount of intracellular core-particle-associated HBV DNA using Southern blotting and real-time polymerase chain reaction. Among these cases, ETV-resistant variants were detected in 2 patients with viral breakthrough and responsible amino acid mutations in reverse transcriptase were successfully identified in these variants. No ETV-resistant mutation was detected in the other cases. The identified ETV-resistant mutations did not confer resistance to tenofovir disoproxil fumarate.

Identifiers

PMID29404449
PMCPMC5721430
OpenAlexW2593306261

What OpenQuestion holds

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Registered trials

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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.