General Information of Drug Transporter (DT)
DT ID DTD0010 Transporter Info
Gene Name SLC22A1
Protein Name Organic cation transporter 1
Gene ID
6580
UniProt ID
O15245
Genetic Polymorphisms of DT (GPD)
Genetic Polymorphism rs12208357
Site of GPD chr6:160122116 (GRCh38.p12)
GPD Type SNP
Allele(s) in dbSNP C>T
Minor Allele Frequency T=0.0204/102 (Global)
 Allele C Click to Show/Hide the Full List of Affected Drugs:            1 Drugs in Total
Metformin Drug Info Diabetes Mellitus Correlated with the increased drug bioavailability (AUC, CL & AUC/CL ratio) [ 1]
 Allele T Click to Show/Hide the Full List of Affected Drugs:            4 Drugs in Total
Tramadol Drug Info Healthy Individuals Correlated with the higher o-desmethyltramadol plasma concentrations in healthy individuals (compare with allele C) [ 2]
Metformin Drug Info Healthy Individuals Correlated with the increased drug exposure in healthy individuals (compare with allele C) [ 3]
Metformin Drug Info Diabetes Mellitus Irrelevant to the drug response in patients (compare with allele C) [ 4]
Metformin Drug Info Polycystic Ovary Syndrome Irrelevant to the drug response in patients (compare with allele C) [ 5]
 Genotype TT Click to Show/Hide the Full List of Affected Drugs:            1 Drugs in Total
Metformin Drug Info Healthy Individuals Correlated with the decreased drug exposure in healthy individuals (compare with genotype CC) [ 6]
Genetic Polymorphism rs2282143
Site of GPD chr6:160136611 (GRCh38.p12)
GPD Type SNP
Allele(s) in dbSNP C>G / C>T
Minor Allele Frequency T=0.0663/332 (Global)
 Genotype CC Click to Show/Hide the Full List of Affected Drugs:            1 Drugs in Total
Metformin Drug Info Healthy Individuals Correlated with the increased drug clearance in healthy individuals (compare with Genotypes CT + TT) [ 7]
Genetic Polymorphism rs35167514
Site of GPD chr6:160139849 (GRCh38.p12)
GPD Type DeletionDeletion
Allele(s) in dbSNP delA
 Genotype DEL Click to Show/Hide the Full List of Affected Drugs:            1 Drugs in Total
Tramadol Drug Info Healthy Individuals Correlated with the increased plasma concentrations of o-desmethyltramadol in healthy individuals (compare with allele A) [ 2]
Genetic Polymorphism rs36056065
 Allele GTAAGTTG Click to Show/Hide the Full List of Affected Drugs:            1 Drugs in Total
Metformin Drug Info Diabetes Mellitus Correlated with the gastrointestinal side effects in patients (compare with allele del) [ 8]
Genetic Polymorphism rs628031
Site of GPD chr6:160139813 (GRCh38.p12)
GPD Type SNP
Allele(s) in dbSNP A>C / A>G
Minor Allele Frequency A=0.3123/1564 (Global)
 Allele A Click to Show/Hide the Full List of Affected Drugs:            2 Drugs in Total
Metformin Drug Info Diabetes Mellitus Correlated with the decreased drug response in patients (compare with allele G); Correlated with the gastrointestinal toxicity in patients (compare with allele G) [ 8], [ 10]
Lamotrigine Drug Info Epilepsy Irrelevant to the drug response in patients (compare with Allele G) [ 11]
 Genotype GG Click to Show/Hide the Full List of Affected Drugs:            1 Drugs in Total
Lamotrigine Drug Info Epilepsy Correlated with the increased drug dose in patients (compare with genotypes AA + AG) [ 11]
 Genotypes AA + AG Click to Show/Hide the Full List of Affected Drugs:            1 Drugs in Total
Lamotrigine Drug Info Epilepsy Correlated with the increased drug concentrations in patients (compare with genotype GG) [ 10]
Genetic Polymorphism rs683369
Site of GPD chr6:160130172 (GRCh38.p12)
GPD Type SNP
Allele(s) in dbSNP G>A / G>C / G>T
Minor Allele Frequency G=0.1238/620 (Global)
 Genotype CC Click to Show/Hide the Full List of Affected Drugs:            1 Drugs in Total
Imatinib Drug Info Bcr-Abl Positive Chronic Myelogenous Leukemia Correlated with the decreased drug concentrations in patients (compare with genotypes CG + GG); Correlated with the increased drug clearance in patients (compare with genotypes CG + GG) [ 12]
 Genotypes CG + GG Click to Show/Hide the Full List of Affected Drugs:            1 Drugs in Total
Imatinib Drug Info Gastrointestinal Stromal Tumors Correlated with the increased conjunctival hemorrhage risk in patients (compare with genotype CC) [ 13]
Genetic Polymorphism rs72552763
Site of GPD chr6:160139849-160139853 (GRCh38.p12)
GPD Type Indel Insertion and Deletion
Allele(s) in dbSNP delGAT
 Genotype GAT/DEL Click to Show/Hide the Full List of Affected Drugs:            1 Drugs in Total
Metformin Drug Info Diabetes Mellitus Correlated with the decreased drug trough steady-state concentration in patients (compare with genotype GAt/GAt) [ 14]
Genetic Polymorphism rs594709
Site of GPD chr6:160134722 (GRCh38.p12)
GPD Type SNP
Allele(s) in dbSNP G>A
Minor Allele Frequency G=0.3179/1592 (Global)
 Genotypes AA + AG Click to Show/Hide the Full List of Affected Drugs:            1 Drugs in Total
Metformin Drug Info Diabetes Mellitus Correlated with the increased drug response in patients (compare with genotype GG) [ 15]
References
1 Effect of genetic variation in the organic cation transporter 1, OCT1, on metformin pharmacokinetics. Clin Pharmacol Ther. 2008 Feb;83(2):273-80.
2 Genetically polymorphic OCT1: another piece in the puzzle of the variable pharmacokinetics and pharmacodynamics of the opioidergic drug tramadol. Clin Pharmacol Ther. 2011 Jul;90(1):143-50.
3 Influence of pharmacogenetic polymorphisms and demographic variables on metformin pharmacokinetics in an admixed Brazilian cohort. Br J Clin Pharmacol. 2018 May;84(5):987-996.
4 Variants in Pharmacokinetic Transporters and Glycemic Response to Metformin: A Metgen Meta-Analysis. Clin Pharmacol Ther. 2017 Jun;101(6):763-772.
5 The Pharmacogenetics of Metformin in Women with Polycystic Ovary Syndrome: A Randomized Trial. Basic Clin Pharmacol Toxicol. 2018 Feb;122(2):239-244.
6 Genetic Polymorphisms in Organic Cation Transporter 1 Attenuates Hepatic Metformin Exposure in Humans. Clin Pharmacol Ther. 2017 Nov;102(5):841-848.
7 Influences of organic cation transporter polymorphisms on the population pharmacokinetics of metformin in healthy subjects. AAPS J. 2013 Apr;15(2):571-80.
8 Association of genetic variation in the organic cation transporters OCT1, OCT2 and multidrug and toxin extrusion 1 transporter protein genes with the gastrointestinal side effects and lower BMI in metformin-treated type 2 diabetes patients. Pharmacogenet Genomics. 2012 Sep;22(9):659-66.
9 Human organic cation transporter (OCT1 and OCT2) gene polymorphisms and therapeutic effects of metformin. J Hum Genet. 2007;52(2):117-22.
10 Specific OCT1 and ABCG2 polymorphisms are associated with Lamotrigine concentrations in Chinese patients with epilepsy. Epilepsy Res. 2016 Nov;127:186-190.
11 Pharmacokinetics of lamotrigine and its metabolite N-2-glucuronide: Influence of polymorphism of UDP-glucuronosyltransferases and drug transporters. Br J Clin Pharmacol. 2016 Aug;82(2):399-411.
12 The c.480C>G polymorphism of hOCT1 influences imatinib clearance in patients affected by chronic myeloid leukemia. Pharmacogenomics J. 2014 Aug;14(4):328-35.
13 Imatinib-induced ophthalmological side-effects in GIST patients are associated with the variations of EGFR, SLC22A1, SLC22A5 and ABCB1. Pharmacogenomics J. 2018 May 22;18(3):460-466.
14 The pharmacogenetics of metformin and its impact on plasma metformin steady-state levels and glycosylated hemoglobin A1c. Pharmacogenet Genomics. 2011 Dec;21(12):837-50.
15 The Impacts of SLC22A1 rs594709 and SLC47A1 rs2289669 Polymorphisms on Metformin Therapeutic Efficacy in Chinese Type 2 Diabetes Patients.

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