GTR Test Accession:
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GTR000593353.3
CAP
Last updated in GTR: 2024-04-26
View version history
GTR000593353.3, last updated: 2024-04-26
GTR000593353.2, last updated: 2023-04-06
GTR000593353.1, last updated: 2022-05-31
Last annual review date for the lab: 2023-05-30
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At a Glance
Test purpose:
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Drug Response;
Therapeutic management
Conditions (12):
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Drug metabolism or response; Citalopram response; Clopidogrel response; ...
Genes (1):
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CYP2C19 (10q23.33)
Methods (1):
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Molecular Genetics - Targeted variant analysis: SNP Detection
Target population: Help
Individuals needing preemptive or reactive genotyping for pharmacogenomic purposes.
Clinical validity:
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Not provided
Clinical utility:
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Guidance for selecting a drug therapy and/or dose
Ordering Information
Offered by:
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Test short name:
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2C19R
Specimen Source:
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- Isolated DNA
- Peripheral (whole) blood
- Saliva
- View specimen requirements
Who can order: Help
- Genetic Counselor
- Health Care Provider
- Licensed Dentist
- Licensed Physician
- Nurse Practitioner
- Physician Assistant
- Public Health Mandate
- Registered Nurse
Test Order Code:
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2C19R
View other test codes
View other test codes
Lab contact:
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Elyse Love, MS, CGC, Certified Genetic counselor, CGC, Genetic Counselor
gcmolgen@mayo.edu
1-800-533-1710
gcmolgen@mayo.edu
1-800-533-1710
Contact Policy:
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Laboratory can only accept contact from health care providers. Patients/families are encouraged to discuss genetic testing options with their health care provider.
How to Order:
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https://www.mayocliniclabs.com/test-catalog/Specimen/610043
Order URL
Order URL
Test development:
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Test developed by laboratory (no manufacturer test name)
Informed consent required:
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Based on applicable state law
Pre-test genetic counseling required:
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Decline to answer
Post-test genetic counseling required:
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Decline to answer
Recommended fields not provided:
Test strategy
Conditions
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Total conditions: 12
Condition/Phenotype | Identifier |
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Test Targets
Genes
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Total genes: 1
Gene | Associated Condition | Germline or Somatic | Allele (Lab-provided) | Variant in NCBI |
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Methodology
Total methods: 1
Method Category
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Test method
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Instrument
Targeted variant analysis
SNP Detection
QuantStudio 12K Flex
Clinical Information
Test purpose:
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Drug Response;
Therapeutic management
Clinical utility:
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Guidance for selecting a drug therapy and/or dose
View citations (5)
- Scott SA, Sangkuhl K, Stein CM, Hulot JS, Mega JL, Roden DM, Klein TE, Sabatine MS, Johnson JA, Shuldiner AR, . Clinical Pharmacogenetics Implementation Consortium guidelines for CYP2C19 genotype and clopidogrel therapy: 2013 update. Clin Pharmacol Ther. 2013;94(3):317-23. doi:10.1038/clpt.2013.105. Epub 2013 May 22. PMID: 23698643.
- Hicks JK, Bishop JR, Sangkuhl K, Müller DJ, Ji Y, Leckband SG, Leeder JS, Graham RL, Chiulli DL, LLerena A, Skaar TC, Scott SA, Stingl JC, Klein TE, Caudle KE, Gaedigk A, . Clinical Pharmacogenetics Implementation Consortium (CPIC) Guideline for CYP2D6 and CYP2C19 Genotypes and Dosing of Selective Serotonin Reuptake Inhibitors. Clin Pharmacol Ther. 2015;98(2):127-34. doi:10.1002/cpt.147. Epub 2015 Jun 29. PMID: 25974703.
- Moriyama B, Obeng AO, Barbarino J, Penzak SR, Henning SA, Scott SA, Agúndez J, Wingard JR, McLeod HL, Klein TE, Cross SJ, Caudle KE, Walsh TJ. Clinical Pharmacogenetics Implementation Consortium (CPIC) Guidelines for CYP2C19 and Voriconazole Therapy. Clin Pharmacol Ther. 2017;102(1):45-51. doi:10.1002/cpt.583. Epub 2017 Apr 18. PMID: 27981572.
- Hicks JK, Sangkuhl K, Swen JJ, Ellingrod VL, Müller DJ, Shimoda K, Bishop JR, Kharasch ED, Skaar TC, Gaedigk A, Dunnenberger HM, Klein TE, Caudle KE, Stingl JC. Clinical pharmacogenetics implementation consortium guideline (CPIC) for CYP2D6 and CYP2C19 genotypes and dosing of tricyclic antidepressants: 2016 update. Clin Pharmacol Ther. 2017;102(1):37-44. doi:10.1002/cpt.597. Epub 2017 Feb 13. PMID: 27997040.
- Lima JJ, Thomas CD, Barbarino J, Desta Z, Van Driest SL, El Rouby N, Johnson JA, Cavallari LH, Shakhnovich V, Thacker DL, Scott SA, Schwab M, Uppugunduri CRS, Formea CM, Franciosi JP, Sangkuhl K, Gaedigk A, Klein TE, Gammal RS, Furuta T. Clinical Pharmacogenetics Implementation Consortium (CPIC) Guideline for CYP2C19 and Proton Pump Inhibitor Dosing. Clin Pharmacol Ther. 2021;109(6):1417-1423. doi:10.1002/cpt.2015. Epub 2020 Sep 20. PMID: 32770672.
Target population:
Help
Individuals needing preemptive or reactive genotyping for pharmacogenomic purposes.
View citations (5)
- Scott SA, Sangkuhl K, Stein CM, Hulot JS, Mega JL, Roden DM, Klein TE, Sabatine MS, Johnson JA, Shuldiner AR, . Clinical Pharmacogenetics Implementation Consortium guidelines for CYP2C19 genotype and clopidogrel therapy: 2013 update. Clin Pharmacol Ther. 2013;94(3):317-23. doi:10.1038/clpt.2013.105. Epub 2013 May 22. PMID: 23698643.
- Hicks JK, Bishop JR, Sangkuhl K, Müller DJ, Ji Y, Leckband SG, Leeder JS, Graham RL, Chiulli DL, LLerena A, Skaar TC, Scott SA, Stingl JC, Klein TE, Caudle KE, Gaedigk A, . Clinical Pharmacogenetics Implementation Consortium (CPIC) Guideline for CYP2D6 and CYP2C19 Genotypes and Dosing of Selective Serotonin Reuptake Inhibitors. Clin Pharmacol Ther. 2015;98(2):127-34. doi:10.1002/cpt.147. Epub 2015 Jun 29. PMID: 25974703.
- Moriyama B, Obeng AO, Barbarino J, Penzak SR, Henning SA, Scott SA, Agúndez J, Wingard JR, McLeod HL, Klein TE, Cross SJ, Caudle KE, Walsh TJ. Clinical Pharmacogenetics Implementation Consortium (CPIC) Guidelines for CYP2C19 and Voriconazole Therapy. Clin Pharmacol Ther. 2017;102(1):45-51. doi:10.1002/cpt.583. Epub 2017 Apr 18. PMID: 27981572.
- Hicks JK, Sangkuhl K, Swen JJ, Ellingrod VL, Müller DJ, Shimoda K, Bishop JR, Kharasch ED, Skaar TC, Gaedigk A, Dunnenberger HM, Klein TE, Caudle KE, Stingl JC. Clinical pharmacogenetics implementation consortium guideline (CPIC) for CYP2D6 and CYP2C19 genotypes and dosing of tricyclic antidepressants: 2016 update. Clin Pharmacol Ther. 2017;102(1):37-44. doi:10.1002/cpt.597. Epub 2017 Feb 13. PMID: 27997040.
- Lima JJ, Thomas CD, Barbarino J, Desta Z, Van Driest SL, El Rouby N, Johnson JA, Cavallari LH, Shakhnovich V, Thacker DL, Scott SA, Schwab M, Uppugunduri CRS, Formea CM, Franciosi JP, Sangkuhl K, Gaedigk A, Klein TE, Gammal RS, Furuta T. Clinical Pharmacogenetics Implementation Consortium (CPIC) Guideline for CYP2C19 and Proton Pump Inhibitor Dosing. Clin Pharmacol Ther. 2021;109(6):1417-1423. doi:10.1002/cpt.2015. Epub 2020 Sep 20. PMID: 32770672.
Research:
Is research allowed on the sample after clinical testing is complete?
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Research testing is only performed under IRB approved protocol with an opt-out policy in place.
Research testing is only performed under IRB approved protocol with an opt-out policy in place.
Recommended fields not provided:
Clinical validity,
What is the protocol for interpreting a variation as a VUS?,
Are family members with defined clinical status recruited to assess significance of VUS without charge?,
Will the lab re-contact the ordering physician if variant interpretation changes?,
Sample negative report,
Sample positive report
Technical Information
Test Procedure:
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Genomic DNA is extracted from whole blood or saliva. Genotyping for CYP2C19 alleles is performed using a PCR-based 5'-nuclease assay. Fluorescently labeled detection probes anneal to the target DNA. PCR is used to amplify the section of DNA that contains the variant. If the detection probe is an exact match …
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Test Platform:
Other
Availability:
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Tests performed
Entire test performed in-house
Entire test performed in-house
Analytical Validity:
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Accuracy and analytical sensitivity for targeted simple variant(s) (SNVs and INDELs): (>99%).
Assay limitations:
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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 …
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Proficiency testing (PT):
Is proficiency testing performed for this test?
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Yes
Method used for proficiency testing: Help
Formal PT program
PT Provider: Help
American College of Medical Genetics / College of American Pathologists, ACMG/CAP
Yes
Method used for proficiency testing: Help
Formal PT program
PT Provider: Help
American College of Medical Genetics / College of American Pathologists, ACMG/CAP
Recommended fields not provided:
Test Confirmation,
Citations to support assay limitations,
Description of internal test validation method,
Citations for Analytical validity,
Description of PT method,
Major CAP category, CAP category, CAP test list
Regulatory Approval
FDA Review:
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Category:
FDA exercises enforcement discretion
Additional Information
Reviews:
Clinical resources:
Consumer resources:
IMPORTANT NOTE:
NIH does not independently verify information submitted to GTR; it relies on submitters to provide information that is accurate and not misleading.
NIH makes no endorsements of tests or laboratories listed in GTR. GTR is not a substitute for medical advice.
Patients and consumers
with specific questions about a genetic test should contact a health care provider or a genetics professional.