Evidence map›Paper›PMID 25888824›Full record

ArticleMalaria journal2015

Historical survey of the kdr mutations in the populations of Anopheles sinensis in China in 1996-2014.

Yan Wang, Wanqin Yu, Hua Shi, Zhenzhou Yang, Jiannong Xu, Yajun Ma

Open access · goldAbstract read
In one paragraph

Article in Malaria journal, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
2.6field-weighted citation impact, top 10% 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

16 citing papers in PubMed, 24 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

6 authors at 3 institutions in 2 countries.

Yan WangDepartment of Tropical Infectious Diseases, Second Military Medical University, Shanghai, 200433, China. wang1yu2yan@126.com.
Wanqin YuDepartment of Biology, Molecular Biology Program, New Mexico State University, Las Cruces, NM 88003, USA. ivyyu@nmsu.edu.
Hua ShiCenter for Disease Control and Prevention of P. L.A., Beijing, 100071, China. placdc@139.com.
Zhenzhou YangCenter for Disease Control and Prevention of P. L.A., Beijing, 100071, China. pcochina@hotmail.com.
Jiannong XuDepartment of Biology, Molecular Biology Program, New Mexico State University, Las Cruces, NM 88003, USA. jxu@nmsu.edu.
Yajun MaDepartment of Tropical Infectious Diseases, Second Military Medical University, Shanghai, 200433, China. yajun_ma@163.com.
Centers for Disease Control and Prevention · USNew Mexico State University · USSecond Military Medical University · CN

Funding

Bacterial colonization and immunogenicity in the mosquito gut ecosystemSC1AI112786 · NIAID · NEW MEXICO STATE UNIVERSITY LAS CRUCES · PI XU, JIANNONG · 2014 to 2017
$1.3M
Mosquito larval immunity and its impact on gut microbiota and malaria competenceSC2GM092789 · NIGMS · NEW MEXICO STATE UNIVERSITY LAS CRUCES · PI XU, JIANNONG · 2011 to 2013
$417k
NIAID NIH HHS SC1 AI112786NIAID NIH HHS SC1AI112786NIGMS NIH HHS SC2 GM092789NIGMS NIH HHS SC2GM092789
6 · The paper itself

Abstract

backgroundAnopheles sinensis has become an important malaria vector in China. The long-term extensive utilization of pyrethroids for ITNs and IRS for mosquito control in the last three decades has resulted in the occurrence of resistant An. sinensis populations in many regions. Knockdown resistance (kdr), caused by point mutations in the VGSC gene, is one of the mechanisms that confer resistance to DDT and pyrethroids. Recently, several investigations revealed the kdr occurrence in some An. sinensis populations, however, no kdr data were available earlier than 2009. A survey tracking the dynamics of the kdr mutations in past decades would provide invaluable information to understand how the kdr alleles spread in mosquito populations temporally and spatially.

methodsA survey was conducted on the kdr alleles at condon 1014 of the VGSC gene and their distributions in 733 specimens of An. sinensis and 232 specimens of the other eight member species of the Anopheles hyrcanus group that were collected from 17 provinces in China in 1996-2014.

resultsA total of three kdr alleles, TTT (F), TTG (F) and TGT (C) were detected, and TGT (C) and TTT (F) were already present in the specimens from Jiangsu and Shandong as early as 1997. The TTT (F) was the most frequent mutant allele, and largely distributed in central China, namely Shandong, Jiangsu, Anhui, Henan, Shanghai, Jiangxi and Hubei. When data were analysed in three time intervals, 1996-2001, 2005-2009, 2010-2014, the prevalence of kdr alleles increased progressively over time in the populations in central China. In contrast, the kdr alleles were less frequent in the samples from other regions, especially in Yunnan and Hainan, despite the documented presence of pyrethroid resistant populations in those regions. Interestingly, no mutant alleles were detected in all 232 specimens of eight other species in the An. hyrcanus group.

conclusionThe survey revealed that the kdr occurrence and accumulation in the An. sinensis populations were more frequent in central China than in the other regions, suggesting that the kdr mutations may contribute significantly to the pyrethroid resistance in the mosquitoes in central China.

Indexed as

AnimalsAnophelesChinaGene FrequencyInsecticide ResistanceInsecticidesInsect ProteinsPyrethrinsInsecticidesInsect ProteinsPyrethrins

Identifiers

PMID25888824
PMCPMC4371805
OpenAlexW2146973945

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.