rs35742686

This is a frameshift variant in the CYP2D6 gene.

Key Literature Trait Associations

Codeine Response

CYP2D6*3 is a frameshift deletion (2549delA) that completely abolishes CYP2D6 enzyme function. Carriers cannot convert the prodrug codeine into its active metabolite morphine, rendering codeine and tramadol ineffective for pain relief. CPIC recommends avoiding codeine in CYP2D6 poor metabolizers and selecting alternative analgesics such as non-codeine opioids or non-opioid pain medications.

Gierach M et al. Insulin resistance and thyroid disorders. Endokrynologia Polska 65(1):70-76 (2014)
Allele del
OR
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Candidate gene study

ClinVar annotation

Drug Response★★★
1 publication

Debrisoquine, poor metabolism of

View on ClinVar →

Research that mentions this SNP (3)

Interindividual Variability in the Hepatic Expression of the Human Breast Cancer Resistance Protein (BCRP/ABCG2): Effect of Age, Sex, and Genotype
AssociationN=1,000Bhagwat Prasad et al.(2013)· Journal of Pharmaceutical Sciences

Case-control study of 1,000 Han Chinese individuals (450 epilepsy cases, 550 controls) examining associations between STX1B polymorphisms and epilepsy treatment response. The rs140820592 variant showed significant association with reduced epilepsy risk (OR=0.542, p=0.004) and drug-resistant epilepsy risk (OR=0.260, p=0.004), with eQTL analysis confirming rs140820592 regulates STX1B expression in brain tissues.

Traits studied:Drug-resistant epilepsyDrug-responsive epilepsyEpilepsyImatinib response in chronic myelogenous leukemiaPraziquantel responseTacrolimus metabolism
Genetic sequence variants and the development of secondary primary cancers in patients with head and neck cancers
AssociationN=531Abul Kalam Azad et al.(2012)· Cancer

This case-control association study evaluated 23 genetic sequence variants in 17 genes across DNA repair, cell cycle, and other pathways in 531 stage I-II radiation-treated head and neck cancer (HNC) patients to identify associations with secondary primary cancers (SPCs). Among the variants tested, the DNMT3B C149T variant (rs2424913) showed a strong significant association with SPC development, with adjusted hazard ratios of 2.23 (95% CI, 1.32-3.78; P = .003) for TT versus CC genotype and 1.49 (95% CI, 1.15-1.95; P = .003) per T allele. A haplotype cluster of 5 DNMT3B variants in strong linkage disequilibrium also showed significant associations (P < .003), suggesting aberrant DNA methylation is an important modulator of field cancerization in HNC.

Traits studied:Head and neck cancerSecondary primary cancer (SPC)
Association of RANBP1 haplotype with smooth pursuit eye movement abnormality
ReviewHyun Sub Cheong et al.(2011)· American Journal of Medical Genetics Part B: Neuropsychiatric Genetics

This comprehensive review examines the genomics of schizophrenia and pharmacogenomics of antipsychotic drugs, synthesizing evidence on over 200 genes associated with psychotic disorders. The authors discuss five categories of genes relevant to antipsychotic response: disease-associated genes, mechanism-of-action genes, drug metabolism genes (particularly CYP2D6, CYP2C19, CYP2C9, CYP3A4), drug transporter genes, and pleiotropic genes. The review details pharmacogenomic profiles of 20+ antipsychotic drugs and demonstrates significant ethnic and interindividual variation in drug metabolism phenotypes, with examples including CYP2D6 extensive metabolizers (55.71% of population), intermediate metabolizers (34.7%), poor metabolizers (2.28%), and ultra-rapid metabolizers (7.31%).

Traits studied:Alzheimer diseaseAntipsychotic drug responseAntipsychotic drug side effectsAnxiety disordersBipolar disorderCNS disordersDepressive disorderParkinson's diseasePsychotic disordersSchizoaffective disorderSchizophreniaTardive dyskinesiaVascular dementia

Gene information from NCBI Gene. Variant classifications from ClinVar.

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