Predicting risk for statin-associated myopathy in patients beginning statin therapy, especially simvastatin therapy
确定潜在的他汀类药物脂质降低反应,尤其是在使用pravastatin时
This is a pharmacogenomics test forRS4149056的基因型(C.521T> c)在 *5, *15和 *17等位基因中找到的变体,以及 *17和 *21等位基因中的RS4149015(C.-910G> a). Presence of the *5 allele is associated with an increased risk for simvastatin-associated myopathy.
实时聚合酶链反应(PCR),具有等位基因歧视分析
OATP1B1
Simvastatin
SLCO1B1
Statin
Varies
Testing is available as the single gene assay (this test) or as a part of a focused pharmacogenomics panel, which includes testing for the following genes:CYPs1A2, 2C9, 2C19, 2D6, 3A4, 3A5, 4F2, SLCO1B1,和VKORC1. Order PGXQP / Focused Pharmacogenomics Panel, Varies if multiple pharmacogenomic genotype testing is desired.
Multiple genotype tests can be performed on a single specimen after a single extraction. SeeMultiple Genotype Test Listin Special Instructions for a list of tests that can be ordered together.
Submit only 1 of the following specimens:
样品类型:全血
Container/Tube:Lavender top (EDTA)
Specimen Volume:3 mL
Collection Instructions:
1。Invert several times to mix blood.
2. Send specimen in original tube.
Specimen Stability Information:Ambient (preferred) 9 days/Refrigerated 30 days
样品类型:Saliva
Patient Preparation:Patient should not eat, drink, smoke, or chew gum 30 minutes prior to collection.
补给品:Saliva Swab Collection Kit (T786)
Specimen Volume:1个拭子
Collection Instructions:Collect and send specimen per kit instructions.
Specimen Stability Information:Ambient 30 days
标本类型: Extracted DNA
Container/Tube: 2 mL screw top tube
SpecimenVolume:100 MCL(微型亮片)
Collection Instructions:
1。The preferred volume is 100 mcL at a concentration of 50 ng/mcL.
2.包括管子上的浓度和体积。
Specimen Stability Information: Frozen (preferred)/Ambient/Refrigerated
1。New York Clients-Informed consent is required.Document on the request form or electronic order that a copy is on file. The following documents are available in Special Instructions:
-遗传测试的知情同意(T576)
-遗传测试的知情同意-Spanish(T826)
2.If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-心血管测试请求(T724)
-Therapeutics Test Request(T831)
Blood: 0.4 mL
Saliva: 1 swab
所有标本将在Mayo Clinic Laboratories进行测试适yabo208用性评估。 |
标本类型 | Temperature | Time | Special Container |
---|---|---|---|
Varies | Varies (preferred) |
Predicting risk for statin-associated myopathy in patients beginning statin therapy, especially simvastatin therapy
确定潜在的他汀类药物脂质降低反应,尤其是在使用pravastatin时
This is a pharmacogenomics test forRS4149056的基因型(C.521T> c)在 *5, *15和 *17等位基因中找到的变体,以及 *17和 *21等位基因中的RS4149015(C.-910G> a). Presence of the *5 allele is associated with an increased risk for simvastatin-associated myopathy.
The most common adverse drug reaction associated with statins is skeletal muscle toxicity, which can include myalgia (with and without elevated creatine kinase levels), muscle weakness, muscle cramps, myositis, and rhabdomyolysis.(1) Rhabdomyolysis, while rare, is of clinical concern because of the risk for death as a result of cardiac arrhythmia, renal failure, and disseminated intravascular coagulation. While the underlying causes of statin-associated myopathy are not known, several hypotheses have been formulated, including those related to the biochemical pathway of cholesterol synthesis inhibition and statin metabolism.
SLCO1B1encodes the organic anion-transporting polypeptide 1B1 (OATP1B1) influx transporter located on the basolateral membrane of hepatocytes. OATP1B1 facilitates the hepatic uptake of statins as well as other endogenous compounds (eg, bilirubin). Changes in the activity of this transporter (eg, through genetic variations or drug-drug interactions) can increase the severity of statin-associated myopathy (ie, statin intolerance).(2)
SLCO1B1rs4149056 (c.521T>C, p.V174A), which is found in *5, *15, and *17,interferes with localization of the transporter to the plasma membrane and can lead to increased systemic statin concentrations.(3-4)All statins are substrates of OATP1B1, but the association ofSLCO1B1c.521T>Cwith statin intolerance varies depending on statin and dose and is most pronounced with higher doses of simvastatin therapy. A case-control study of simvastatin-induced myopathy observed an odds ratio (OR) for myopathy of 4.5 for *5 heterozygotes and 16.9 for *5 homozygotes (compared to individuals who did not carry *5) among patients receiving high-dose (80 mg/day) simvastatin therapy.(4) A dose relationship was also demonstrated in a replication cohort of patients taking 40 mg/day simvastatin with a relative risk of 2.6 per copy of the *5 allele. While theSLCO1B1c.521T>C genotype has also been shown to affect systemic exposure of other statins (eg, atorvastatin, pravastatin, rosuvastatin) in addition to simvastatin,(3) there is less evidence demonstrating a clinical association between theSLCO1B1genotype and myopathy with statins other than simvastatin.(2)
SLCO1B1rs4149015 (c.-910G>A), which is found in *17 and *21, is associated with increased pravastatin blood levels and a reduced lipid lowering effect but has not been associated with statin-induced myopathy or rhabdomyolysis.
频率SLCO1B1等位基因在不同的种族和族裔群体中各不相同。
An interpretive report will be provided.
An interpretive report will be provided. The complementary DNA positions are based on NM_006446.4.
For additional information regarding pharmacogenomic genes and their associated drugs, seePharmacogenomic Associations Tables在特殊说明中。该资源还包括有关酶抑制剂和诱导剂的信息,以及潜在的替代药物选择。
Rare variants may be present that could lead to false-negative or false-positive results. If results obtained do not match the clinical findings (phenotype), additional testing should be considered.
Samples may contain donor DNA if obtained from patients who received non-leukoreduced blood transfusions or allogeneic hematopoietic stem cell transplantation. Results from samples obtained under these circumstances may not accurately reflect the recipient's genotype. For individuals who have received blood transfusions, the genotype usually reverts to that of the recipient within 6 weeks. For individuals who have received allogeneic hematopoietic stem cell transplantation, a pretransplant DNA specimen is recommended for testing.SLCO1B1genetic test results in patients who have undergone liver transplantation may not accurately reflect the patient'sSLCO1B1status.
Simvastatin-related myopathy can occur in the absence ofSLCO1B1c.521T>C.
存在SLCO1B1c.521T>C does not confer absolute risk for simvastatin-associated myopathy.
Absence of a variant allele does not rule out the possibility that a patient harbors another variant that can impact medication efficacy and side effects.
1。Wilke RA,Lin DW,Roden DM等人:确定严重不良药物反应的遗传危险因素:当前的进展和挑战[已发表的校正出现在NAT Rev Drug Discov中。2008年2月; 7(2):185]。Nat Rev Drug Discov。2007; 6(11):904-916。doi:10.1038/nrd2423
2. Ramsey LB, Johnson SG, Caudle KE, et al: The clinical pharmacogenetics implementation consortium guideline for SLCO1B1 and simvastatin-induced myopathy: 2014 update. Clin Pharmacol Ther. 2014;96(4):423-428. doi: 10.1038/clpt.2014.125
3. Niemi M. Transporter pharmacogenetics and statin toxicity: Clin Pharmacol Ther. 2010;87(1):130-133. doi: 10.1038/clpt.2009.197
4.搜索协作小组,Link E,Parish S等人:SLCO1B1变体和他汀类药物诱导的肌病 - 一项全基因组研究。N Engl J Med。2008; 359(8):789-799。doi:10.1056/nejmoa0801936
Genomic DNA is extracted from whole blood or saliva. Genotyping forSLCO1B1使用基于聚合酶链反应(PCR)的5'-核酸酶测定法进行等位基因。荧光标记为靶DNA的检测探针退火。PCR用于放大包含变体的DNA截面。如果检测探针与靶DNA完全匹配,则5'-核酸酶聚合酶降解了探针,报告者染料从淬灭剂染料的作用中释放出来,并检测到荧光信号。基因型是根据检测到的等位基因特异性荧光信号分配的。(指令手册:TaqMan SNP Genotyping AssayUser Guide.Applied Biosystems; Revision A.0 01/2014)
Monday through Friday
This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.
81328
Test Id | Test Order Name | Order LOINC Value |
---|---|---|
SLC1Q | SLCO1B1Genotype, V | 93412-5 |
Result Id | 测试结果名称 | Result LOINC Value
Applies only to results expressed in units of measure originally reported by the performing laboratory. These values do not apply to results that are converted to other units of measure.
|
---|---|---|
610152 | SLCO1B1Genotype | 93412-5 |
610153 | SLCO1B1Phenotype | 79722-5 |
610154 | Interpretation | 69047-9 |
610155 | 附加信息 | 48767-8 |
610156 | Method | 85069-3 |
610157 | Disclaimer | 62364-5 |
610158 | Reviewed by | 18771-6 |