Function
Upon binding acetylcholine, the AChR undergoes a significant conformational change affecting all subunits. This change leads to the opening of an ion-conducting channel across the plasma membrane.
Gene References Into Functions
- Glutamatergic N398 neurons exhibited a heightened response to lower nicotine doses (0.1 μM), characterized by increased frequency and amplitude. However, they also displayed rapid desensitization, consistent with previous studies on N398-associated nicotinic receptor function. PMID: 27698409
- Enhanced habenula-striatum functional connectivity might be modulated by the nicotinic receptor variant rs16969968, potentially leading to increased opioid use. PMID: 28857330
- Our recent study suggested that rs667282 in CHRNA5-A3 might influence the prognosis of patients diagnosed with advanced non-small cell lung cancer. PMID: 27050379
- Our findings confirm previous results suggesting CHRNA5 as a potential gene associated with chronic obstructive pulmonary disease (COPD) and rs8040868 as a risk variant for COPD development in the Swedish population. PMID: 27835950
- Polymorphisms in the CHRNA5 and NRXN1 genes were linked to higher cigarette consumption among a Mexican Mestizo population. PMID: 27355804
- The RP11-650L12.2 rs149941240 polymorphism was associated with an increased risk of colorectal cancer. PMID: 28442398
- We identified mutations in genes not previously linked to Rett syndrome or other neurodevelopmental disorders, such as the ankyrin repeat containing protein ANKRD31 or the neuronal acetylcholine receptor subunit alpha-5 (CHRNA5), in patients with these conditions. PMID: 27541642
- Quitting smoking significantly reduces lung cancer risks for smokers, irrespective of their CHRNA5 rs16969968 genetic risk status. Smokers with high-risk CHRNA5 genotypes can effectively mitigate their increased genetic risk for lung cancer by quitting smoking. This action can halve their lung cancer risk and delay its onset by 7 years for those who develop it. PMID: 27543155
- The study revealed that multiple rare, low-frequency, and common variants in the CHRNA5 gene contribute to the development of nicotine dependence. PMID: 26239294
- Our meta-analysis did not find an association between the rs16969968 polymorphism at CHRNA5 and cancer risk in the overall pooled analysis. PMID: 27072204
- rs2036527 is identified as a risk factor for smoking exposure and lung cancer association in African-Americans. PMID: 26981579
- Preventive interventions implemented in adolescents reduced the genetic risk for smoking associated with rs16969968 CHRNA5. PMID: 25941207
- Findings suggest that gene variance in the CHRNA5-CHRNA3-CHRNB4 cluster is associated with an elevated risk of death, incidence of COPD, and tobacco-related cancer among smokers. PMID: 26689306
- These results indicate that nicotine exposure might negatively impact the apoptotic potential of chemotherapeutic drugs. Additionally, alpha5-nAChR/AKT signaling plays a crucial role in the anti-apoptotic activity of nicotine induced by cisplatin. PMID: 26909550
- A novel regulatory SNP association with nicotine dependence was identified. Previously observed differences in CHRNA5 mRNA expression and nicotine dependence risk were linked to underlying DNA methylation differences. PMID: 26220977
- Our meta-analysis provided statistical evidence for a strong association between rs16969968 polymorphism and the risk of lung cancer, particularly in smokers and Caucasians. PMID: 26434895
- This study demonstrated that CHRNA5(rs16969968) interacts with chronic low family support in relation to child mental health status. PMID: 26228411
- No associations were observed between the analyzed variants and smoking. However, an association was found among non-smoking subjects between the A allele of rs16969968 and a high body mass index. PMID: 26757861
- In non-Hispanic White participants, a novel association between rs1289899 in the CHRNA5 gene and posttraumatic stress disorder was observed. PMID: 26184988
- A low to moderate level of nicotine dependence among the Kashubians of Poland was demonstrated. This dependence was influenced by age, sex, and the CHRNA5 rs16969968 variant. PMID: 25652844
- Results suggest that the minor alleles of both polymorphisms modulate response speed in a sex-dependent, diametrically opposed manner. PMID: 25674902
- The CHRNA5 genetic risk synergized the effect of partner smoking, resulting in a particularly low likelihood of successful smoking reduction in two complementary studies. PMID: 25073833
- Individuals with the combined variant genotypes (ins/del+del/del) of CHRNA5 rs3841324 exhibited a greater than 1.5-fold elevated risk for nasopharyngeal carcinoma. PMID: 25329654
- Genetic variation in the CHRNA5 protein influences smoking behaviors and carbon monoxide levels. PMID: 25072098
- CHRNA5 SNPs predicted nicotine deprivation-induced reduction in cognitive control. PMID: 24934182
- Among smokers hospitalized with acute myocardial infarction, the high-risk CHRNA5 allele was associated with a reduced likelihood of quitting smoking before hospitalization and significantly less abstinence one year after hospitalization for MI. PMID: 24727484
- The effect of nicotine replacement on continuous abstinence is moderated by the combined genetic risks from CYP2A6 and CHRNA5. PMID: 24033696
- Single nucleotide polymorphism in CHRNA5 is associated with lung cancer susceptibility. PMID: 25187487
- Data indicate that DRD2 rs1076560 and CHRNA5 rs16969968 interact to modulate cognitive function, prefrontal physiology during working memory, and prefrontal gray matter volume. PMID: 24819610
- In African-Americans, variants (common or rare) in genes other than CHRNA5 likely contribute to the nicotine-dependent phenotype. PMID: 24682045
- Substance dependence associated variants have a direct cis-regulatory effect on CHRNA5 transcript levels in human frontal cortices of African and European ancestry. PMID: 24303001
- Among African Americans, CHRNA5-A3-B4 variants are not associated with smoking but can influence smoking abstinence. PMID: 24733007
- This study investigated the association of CHRNA5 polymorphisms and smoking topography. PMID: 23358500
- The heterozygous genotype c.-166T>A at rs503464 of CHRNA5 may be associated with a reduced risk of lung cancer, potentially representing a susceptibility allele in Chinese individuals. PMID: 23314339
- Silencing of alpha5-nAChR significantly inhibits nicotine-induced cell proliferation in tumor cell lines. PMID: 24793809
- Women carrying the variant AA genotype of CHRNA5 rs16969968 or variant CC genotype of LOC123688 rs8034191 had a significantly increased risk of heavy smoking. PMID: 21810735
- The alpha5 subunit can occupy the position of a non-binding subunit or replace a beta2 subunit participating in a canonical binding site. PMID: 24184962
- CHRNA5 polymorphism was associated with pack-year of smoking in chronic obstructive pulmonary disease Chinese Han patients. PMID: 22914670
- This study evaluated the association between CHRNA5-A3-B4 gene cluster variants (rs667282 and rs3743073, two variants modifying lung cancer risk) and the risk of gastric cancer. PMID: 23576140
- The rs588765 nicotine dependence risk allele 'C' was associated with delayed age at onset among ever-smokers, even when smoking intensity variables were considered. However, it had no significant effect among never-smokers. PMID: 22884254
- Our findings provide evidence for the presence of multiple CHRNA5 mRNA isoforms that may modulate the multimeric nicotine receptor and cis-regulatory variations in the CHRNA5 locus that act in vivo in the control of CHRNA5 mRNA expression. PMID: 23430818
- Single-nucleotide polymorphism in the CHRNA5 gene is associated with lung cancer susceptibility. PMID: 23221128
- Findings from this study suggest that personality measures may play a significant role in substance use disorders, influencing both environmental factors (marriage) and genetic rs16969968 in CHRNA5 levels. PMID: 23308091
- Nicotinic acetylcholine receptor single nucleotide polymorphism is associated with response to smoking cessation therapies. PMID: 23249876
- The intronic rs871058, which is highly correlated with rs16969968 in CHRNA5, shows a modest treatment effect for subjects possessing the rare allele but has a significant effect for non-carriers. PMID: 23061658
- Results revealed that several of the polymorphisms and their haplotypes in CHRNA5/CHRNA3 genes may have functional effects on: (i) CHRNA5 mRNA levels, (ii) polycyclic aromatic hydrocarbon-DNA adduct levels, and (iii) susceptibility to lung cancer. PMID: 23011884
- Alpha3beta4alpha5 nicotinic acetylcholine receptors, expressing the N398 variant of CHRNA5, exhibit a reduced response to agonists when extracellular calcium is high, potentially leading to distinct downstream cellular signaling. PMID: 22820273
- Two specific aspects of executive functioning related to drug addiction—impulsivity and working memory—are demonstrated in transgenic mice overexpressing alpha3/alpha5/beta4 nicotinic receptor subunits. PMID: 22024278
- The A allele of the single nucleotide polymorphism rs16969968 (alpha5, G>A), which correlates with lung cancer development, shows a non-significant trend to be associated with cervical lesions. PMID: 22406075
- Results suggest an important role for CHRNA5 variants as a genetic risk factor for airflow obstruction, potentially independent of smoking status. PMID: 22837378
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Protein Families
Ligand-gated ion channel (TC 1.A.9) family, Acetylcholine receptor (TC 1.A.9.1) subfamily, Alpha-5/CHRNA5 sub-subfamily
Subcellular Location
Cell junction, synapse, postsynaptic cell membrane; Multi-pass membrane protein. Cell membrane; Multi-pass membrane protein.