Evidence map›Paper›PMID 30659208›Full record

ArticleScientific reports2019

Effects of smoking on cognition and BDNF levels in a male Chinese population: relationship with BDNF Val66Met polymorphism.

Haisen Xia, Xiangdong Du, Guangzhong Yin, Yingyang Zhang, Xiaosi Li, Junyi Cai, Xingbing Huang, Yuping Ning, Jair C Soares, Fengchun Wu and 1 more

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 1 pooled it
2.0field-weighted citation impact, top 16% 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

17 citing papers in PubMed, 1 synthesis or guideline pooled it, 33 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

11 authors at 5 institutions in 2 countries.

Haisen XiaHefei Fourth People's Hospital, Anhui Mental Health Center, Hefei, China.
Xiangdong DuSuzhou Psychiatric Hospital, The Affiliated Guangji Hospital of Soochow University, Jiangsu, China.
Guangzhong YinSuzhou Psychiatric Hospital, The Affiliated Guangji Hospital of Soochow University, Jiangsu, China.
Yingyang ZhangSuzhou Psychiatric Hospital, The Affiliated Guangji Hospital of Soochow University, Jiangsu, China.
Xiaosi LiHefei Fourth People's Hospital, Anhui Mental Health Center, Hefei, China.
Junyi CaiThe Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China.
Xingbing HuangThe Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China.
Yuping NingThe Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China.
Jair C SoaresDepartment of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, Texas, USA.
Fengchun WuThe Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), Guangzhou, China. 13580380071@163.com.
Xiang Yang ZhangInstitute of Psychology, Chinese Academy of Sciences, Beijing, China. zhangxy@psych.ac.cn.
Guangzhou Medical University · CNSoochow University · CNAnhui Mental Health Center · CNInstitute of Psychology, Chinese Academy of Sciences · CNThe University of Texas Health Science Center at Houston · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Recent studies demonstrate that brain-derived neurotrophic factor (BDNF) might be associated with nicotine addiction, and circulating BDNF is a biomarker of memory and general cognitive function. Moreover, studies suggest that a functional polymorphism of the BDNF Val66Met may mediate hippocampal-dependent cognitive functions. We aimed to explore the relationships between smoking, cognitive performance and BDNF in a normal Chinese Han population. We recruited 628 male healthy subjects, inducing 322 smokers and 306 nonsmokers, and genotyped them the BDNF Val66Met polymorphism. Of these, we assessed 114 smokers and 98 nonsmokers on the repeatable battery for the assessment of neuropsychological status (RBANS), and 103 smokers and 89 nonsmokers on serum BDNF levels. Smokers scored lower than the nonsmokers on RBANS total score (p = 0.002), immediate memory (p = 0.003) and delayed memory (p = 0.021). BDNF levels among the smokers who were Val allele carriers were correlated with the degree of cognitive impairments, especially attention, as well as with the carbon monoxide concentrations. Our findings suggest that smoking is associated with cognitive impairment in a male Chinese Han population. The association between higher BDNF levels and cognitive impairment, mainly attention in smokers appears to be dependent on the BDNF Val66Met polymorphism.

Indexed as

AdultAgedAllelesAsian PeopleBrain-Derived Neurotrophic FactorCognitionCognition DisordersCognitive DysfunctionGene FrequencyGenetic Predisposition to DiseaseGenotypeHumansMaleMemoryMiddle AgedPolymorphism, Single NucleotideBDNF protein, humanBrain-Derived Neurotrophic Factor

Identifiers

PMID30659208
PMCPMC6338731
OpenAlexW2910136293

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.