2021
DOI: 10.3389/fgene.2021.741395
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Revisiting Secondary Information Related to Pharmacogenetic Testing

Abstract: Incidental or secondary findings have been a major part of the discussion of genomic medicine research and clinical applications. For pharmacogenetic (PGx) testing, secondary findings arise due to the pleiotropic effects of pharmacogenes, often related to their endogenous functions. Unlike the guidelines that have been developed for whole exome or genome sequencing applications for management of secondary findings (though slightly different from PGx testing in that these refer to detection of variants in multi… Show more

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Cited by 8 publications
(10 citation statements)
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References 88 publications
(87 reference statements)
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“…Although the test is obtained to evaluate for the presence of a variant that affects the response to a specific medication, at times, the variant is also associated with an unrelated phenotype. 51 The Clinical Pharmacogenetics Implementation Consortium has published numerous guidelines for specific pharmacogenomic test results, and each has a section that describes potential unrelated phenotypes that may be identified. Unfortunately, these guidelines do not address how these incidental results should be reported, and there are no standards for the reporting of incidental findings identified at the time of clinical pharmacogenomic testing.…”
Section: Pharmacogenomic Variantsmentioning
confidence: 99%
“…Although the test is obtained to evaluate for the presence of a variant that affects the response to a specific medication, at times, the variant is also associated with an unrelated phenotype. 51 The Clinical Pharmacogenetics Implementation Consortium has published numerous guidelines for specific pharmacogenomic test results, and each has a section that describes potential unrelated phenotypes that may be identified. Unfortunately, these guidelines do not address how these incidental results should be reported, and there are no standards for the reporting of incidental findings identified at the time of clinical pharmacogenomic testing.…”
Section: Pharmacogenomic Variantsmentioning
confidence: 99%
“…The first class is related to the pleiotropic effects of some pharmacogenes. Examples are testing of UGT1A1 to predict irinotecan response, which can reveal carrier status of variants causing Crigler–Najjar syndrome, or tests of VKORC1 variability to guide warfarin dosing, which can return secondary findings regarding the risks of familiar coagulopathies 68 . While the second is a consequence of testing strategies that evaluate not only a given locus of interest, but might evaluate the entire pharmacogenome, exome or genome.…”
Section: Implementation and Precision Medicinementioning
confidence: 99%
“…Examples are testing of UGT1A1 to predict irinotecan response, which can reveal carrier status of variants causing Crigler–Najjar syndrome, or tests of VKORC1 variability to guide warfarin dosing, which can return secondary findings regarding the risks of familiar coagulopathies. 68 While the second is a consequence of testing strategies that evaluate not only a given locus of interest, but might evaluate the entire pharmacogenome, exome or genome. While targeted pharmacogenomic sequencing rarely overlaps with analyses of strong markers of disease risk or prognosis, the likelihood of incidental findings increases if WES or WGS are employed.…”
Section: Implementation and Precision Medicinementioning
confidence: 99%
“…70 Upon receipt of PGx test results, secondary or incidental findings are typically low, but there are examples where some PGx test results may have implications for an individual's health status or disease risk. 71 In addition, PGx testing might reveal information that would be relevant to family members, which raises fundamental questions about how "informed consent" for testing is obtained and how test results should be communicated to patients. This is a major concern as there are no standard guidelines regarding this issue.…”
Section: Ethical and Legal Issuesmentioning
confidence: 99%
“…This is a major concern as there are no standard guidelines regarding this issue. Patient and provider education regarding these issues will both increase knowledge and reduce adverse responses related to secondary findings 71 …”
Section: Hurdlesmentioning
confidence: 99%