Mikko Niemi

ORCID: 0000-0003-4550-2189
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About
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Research Areas
  • Drug Transport and Resistance Mechanisms
  • Pharmacogenetics and Drug Metabolism
  • Pharmacological Effects and Toxicity Studies
  • Lipoproteins and Cardiovascular Health
  • Antiplatelet Therapy and Cardiovascular Diseases
  • Atrial Fibrillation Management and Outcomes
  • Inflammatory mediators and NSAID effects
  • Diabetes Treatment and Management
  • Liver Disease Diagnosis and Treatment
  • HIV/AIDS drug development and treatment
  • Metabolism and Genetic Disorders
  • Eicosanoids and Hypertension Pharmacology
  • Sperm and Testicular Function
  • Computational Drug Discovery Methods
  • Diet and metabolism studies
  • Pharmaceutical studies and practices
  • Drug-Induced Hepatotoxicity and Protection
  • Hormonal and reproductive studies
  • Pharmaceutical Economics and Policy
  • Hormonal Regulation and Hypertension
  • Pharmaceutical Practices and Patient Outcomes
  • Cholesterol and Lipid Metabolism
  • Genomics and Rare Diseases
  • Birth, Development, and Health
  • Testicular diseases and treatments

University of Helsinki
2016-2025

Helsinki University Hospital
2016-2025

University of Turku
1970-2021

Finnish Institute for Health and Welfare
2021

Tampere University Hospital
2021

Turku PET Centre
2021

Tampere University
2021

Turku University Hospital
2021

Universitätsmedizin Greifswald
2021

University of Rostock
2021

Background and objective Organic anion transporting polypeptide 1B1 (OATP1B1) is an uptake transporter located at the sinusoidal membrane of human hepatocytes. This study aimed to investigate effects genetic polymorphism in SLCO1B1 gene encoding OATP1B1 on pharmacokinetics simvastatin. Methods Four healthy volunteers with homozygous c.521CC genotype, 12 heterozygous c.521TC genotype 16 c.521TT (controls) were recruited. Each participant ingested a single 40-mg dose Plasma concentrations...

10.1097/01.fpc.0000230416.82349.90 article EN Pharmacogenetics and Genomics 2006-12-01

This study aimed to characterize possible relationships between polymorphisms in the drug transporter genes organic anion transporting polypeptide-C (OATP-C, SLCO1B1), OATP-B (SLCO2B1), multidrug resistance-associated protein 2 (MRP2, ABCC2) and resistance (MDR1, ABCB1) pharmacokinetics of pravastatin. We studied 41 healthy Caucasian volunteers who had previously participated pharmacokinetic studies with Six a very high pravastatin AUC value were defined as outliers according statistical...

10.1097/01.fpc.0000114750.08559.32 article EN Pharmacogenetics 2004-06-28

Simvastatin is among the most commonly used prescription medications for cholesterol reduction. A single coding single-nucleotide polymorphism, rs4149056T>C, in SLCO1B1 increases systemic exposure to simvastatin and risk of muscle toxicity. We summarize evidence from literature supporting this association provide therapeutic recommendations based on genotype. This article an update 2012 Clinical Pharmacogenetics Implementation Consortium guideline simvastatin-induced myopathy.

10.1038/clpt.2014.125 article EN Clinical Pharmacology & Therapeutics 2014-06-11

Thirty-two healthy volunteers with different SLCO1B1 genotypes ingested a 20 mg dose of atorvastatin and 10 rosuvastatin washout period 1 week. Subjects the c.521CC genotype (n=4) had 144% (P<0.001) or 61% (P=0.049) greater mean area under plasma concentration–time curve from 0 to 48 h (AUC0–48 h) than those c.521TT (n=16) c.521TC (n=12) genotype, respectively. The AUC0–48 2-hydroxyatorvastatin was 100% in subjects (P=0.018). Rosuvastatin peak concentration (Cmax) were 65% (P=0.002) 79%...

10.1038/sj.clpt.6100220 article EN Clinical Pharmacology & Therapeutics 2007-05-02

Organic anion transporting polypeptide 1B1 (OATP1B1) is an uptake transporter located at the sinusoidal membrane of human hepatocytes. This study aimed to investigate effects genetic polymorphism in SLCO1B1 gene encoding OATP1B1 on pharmacokinetics simvastatin.Four healthy volunteers with homozygous c.521CC genotype, 12 heterozygous c.521TC genotype and 16 c.521TT (controls) were recruited. Each participant ingested a single 40-mg dose simvastatin. Plasma concentrations simvastatin (inactive...

10.1097/fpc.0000000000000148 article EN Pharmacogenetics and Genomics 2015-05-28

The ABCG2 c.421C>A single-nucleotide polymorphism (SNP) was determined in 660 healthy Finnish volunteers, of whom 32 participated a pharmacokinetic crossover study involving the administration 20 mg atorvastatin and rosuvastatin. frequency c.421A variant allele 9.5% (95% confidence interval 8.1–11.3%). Subjects with c.421AA genotype (n = 4) had 72% larger mean area under plasma concentration–time curve from time 0 to infinity (AUC0–∞) than individuals c.421CC 16; P 0.049). In participants...

10.1038/clpt.2009.79 article EN Clinical Pharmacology & Therapeutics 2009-05-27

Background and Objective A large interindividual variability exists in the plasma concentrations of repaglinide. Our aim was to investigate possible associations between pharmacokinetics repaglinide single nucleotide polymorphisms (SNPs) genes encoding for drug transporters organic anion transporting polypeptide 1B1 (OATP1B1) (SLCO1B1) P-glycoprotein (MDR1, ABCB1) drug-metabolizing enzymes cytochrome P450 (CYP) 2C8 CYP3A5. Methods total 56 healthy volunteers ingested a 0.25-mg dose Plasma...

10.1016/j.clpt.2005.01.018 article EN Clinical Pharmacology & Therapeutics 2005-05-08

The recovery from stroke of 154 survivors out 255 patients was analyzed. outcomes documented were: discharge hospital, activities daily living (ADL) and return to work. A clear improvement in neurological neuropsychological deficits seen the acute stage three months, this continued twelve but a lesser degree. 69% 78% respectively, were at home months after stroke. Independence ADL increased 32% acutely 62% 68% by respectively. Of those gainfully employed prior stroke, 55% had returned work...

10.1161/01.str.15.6.1039 article EN Stroke 1984-11-01

Cholesterol reduction from statin therapy has been one of the greatest public health successes in modern medicine. Simvastatin is among most commonly used prescription medications. A non-synonymous coding single-nucleotide polymorphism (SNP), rs4149056, SLCO1B1 markedly increases systemic exposure to simvastatin and risk muscle toxicity. This guideline explores relationship between rs4149056 (c.521T>C, p.V174A) clinical outcome for all statins. The strength evidence high myopathy with...

10.1038/clpt.2012.57 article EN Clinical Pharmacology & Therapeutics 2012-05-23

Abstract Background Organic anion transporting polypeptide (OATP) 1B1, OATP1B3, and OATP2B1 (encoded by SLCO1B1, SLCO1B3, SLCO2B1 ) mediate the hepatic uptake of endogenous compounds like bile acids drugs, for example, lipid-lowering atorvastatin, thereby influencing hepatobiliary elimination. Here we systematically elucidated contribution SLCO variants on expression three OATPs under consideration additional important covariates. Methods Expression was quantified RT-PCR immunoblotting in...

10.1186/gm405 article EN cc-by Genome Medicine 2013-01-11

Statins reduce cholesterol, prevent cardiovascular disease, and are among the most commonly prescribed medications in world. Statin‐associated musculoskeletal symptoms (SAMS) impact statin adherence ultimately can impede long‐term effectiveness of therapy. There several identified pharmacogenetic variants that disposition adverse events during SLCO1B1 encodes a transporter (SLCO1B1; alternative names include OATP1B1 or OATP‐C) facilitates hepatic uptake all statins. ABCG2 an efflux (BCRP)...

10.1002/cpt.2557 article EN Clinical Pharmacology & Therapeutics 2022-02-13

The quality of life for 46 stroke survivors under the age 65 years in a register was studied 4 after their first stroke. A questionnaire covering four domains (working conditions, activities at home, family relationships, and leisure time activities) used investigation life. results showed that spite good recovery terms discharge from hospital, daily living, return to work, most patients (83%) had not been restored prestroke level. Deterioration among several ranged 39% 80%, lowest being...

10.1161/01.str.19.9.1101 article EN Stroke 1988-09-01

Objective Pravastatin is a hydrophilic substrate and fluvastatin lipophilic of the hepatic uptake transporter organic anion transporting polypeptide 1B1 encoded by SLCO1B1. Our aim was to compare effects SLCO1B1 polymorphism on pharmacokinetics pravastatin fluvastatin. Methods We recruited 4 healthy volunteers (3 men 1 woman) with homozygous c.521CC genotype, 12 (7 5 women) heterozygous c.521TC 16 (8 8 c.521TT genotype (control subjects). In crossover study each subject ingested single 40-mg...

10.1016/j.clpt.2006.06.010 article EN Clinical Pharmacology & Therapeutics 2006-10-01

10.1111/j.0954-6820.1964.tb04630.x article EN Acta Medica Scandinavica 1964-01-12
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