Genetic sex validation for sample tracking in next-generation sequencing clinical testing
- PMID: 38433186
- PMCID: PMC10910835
- DOI: 10.1186/s13104-024-06723-w
Genetic sex validation for sample tracking in next-generation sequencing clinical testing
Abstract
Objective: Data from DNA genotyping via a 96-SNP panel in a study of 25,015 clinical samples were utilized for quality control and tracking of sample identity in a clinical sequencing network. The study aimed to demonstrate the value of both the precise SNP tracking and the utility of the panel for predicting the sex-by-genotype of the participants, to identify possible sample mix-ups.
Results: Precise SNP tracking showed no sample swap errors within the clinical testing laboratories. In contrast, when comparing predicted sex-by-genotype to the provided sex on the test requisition, we identified 110 inconsistencies from 25,015 clinical samples (0.44%), that had occurred during sample collection or accessioning. The genetic sex predictions were confirmed using additional SNP sites in the sequencing data or high-density genotyping arrays. It was determined that discrepancies resulted from clerical errors (49.09%), samples from transgender participants (3.64%) and stem cell or bone marrow transplant patients (7.27%) along with undetermined sample mix-ups (40%) for which sample swaps occurred prior to arrival at genome centers, however the exact cause of the events at the sampling sites resulting in the mix-ups were not able to be determined.
Keywords: Clinical testing; Next-generation sequencing (NGS); SNP genotyping; Sex concordance.
© 2024. The Author(s).
Conflict of interest statement
JH, DM, MM, RAG, DMM disclose that the Baylor Genetics Laboratory is co-owned by Baylor College of Medicine. EV is cofounder of Codified Genomics, which provides variant interpretation services. DM has received consulting fees from Illumina. The remaining authors disclose they have no competing interests.
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Update of
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Genetic Sex Validation for Sample Tracking in Clinical Testing.Res Sq [Preprint]. 2023 Sep 11:rs.3.rs-3304685. doi: 10.21203/rs.3.rs-3304685/v1. Res Sq. 2023. Update in: BMC Res Notes. 2024 Mar 3;17(1):62. doi: 10.1186/s13104-024-06723-w. PMID: 37790445 Free PMC article. Updated. Preprint.
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