Assessment of Illumina® Human mtDNA Genome assay: workflow evaluation with development of analysis and interpretation guidelines

Sukser, Viktorija; Rokić, Filip; Barbarić, Lucija; Korolija, Marina (2021) Assessment of Illumina® Human mtDNA Genome assay: workflow evaluation with development of analysis and interpretation guidelines. International Journal of Legal Medicine . ISSN 0937-9827 (In Press)

Preview	PDF (This is a post-peer-review, pre-copyedit version of an article published in International journal of legal medicine. The final authenticated version is available online at: http://dx.doi.org/10.1007/s00414-021-02508-z) - Submitted Version - article Download (1MB) | Preview
Preview	PDF (This is a post-peer-review, pre-copyedit version of an article published in International journal of legal medicine. The final authenticated version is available online at: http://dx.doi.org10.1007/s00414-021-02508-z) - Accepted Version - article Download (1MB) | Preview

Abstract

Mitochondrial DNA (mtDNA) is a small but significant part of the human genome, whose applicability potential has gradually increased with the advent of massively parallel sequencing (MPS) technology. Knowledge of the particular workflow, equipment and reagents used, along with extensive usage of negative controls to monitor all preparation steps constitute the prerequisites for confident reporting of results. In this study, we performed assessment of Illumina® Human mtDNA Genome assay on MiSeq FGx TM instrument. Through analysis of several types of negative controls, as well as mtDNA positive controls, we established thresholds for data analysis and interpretation, consisting of several components: minimum read depth (220 reads), minimum quality score (41), percentage of minor allele sufficient for analysis (3.0%), percentage of minor allele sufficient for interpretation (6.0%), and percentage of major allele sufficient for homoplasmic variant call (97.0%). Based on these criteria, we defined internal guidelines for analysis and interpretation of mtDNA results obtained by MPS. Our study shows that the whole mtDNA assay on MiSeq FGx TM produces repeatable and reproducible results, independent of analyst, which are also concordant with Sanger-type sequencing results for mtDNA control region, as well as with MPS results produced by NextSeq®. Overall, established thresholds and interpretation guidelines were successfully applied for sequencing of complete mitochondrial genomes from high-quality samples. The underlying principles and proposed methodology on definition of internal laboratory guidelines for analysis and interpretation of MPS results may be applicable to similar MPS workflows, primarily in forensic genetics and molecular diagnostics.

Item Type:	Article
Uncontrolled Keywords:	MiSeq; mitochondrial DNA; Nextera XT; evaluation; analysis thresholds
Subjects:	NATURAL SCIENCES > Biology
Divisions:	Division of Molecular Medicine
Depositing User:	Lovorka Čaja
Date Deposited:	26 Jan 2021 11:12
URI:	http://fulir.irb.hr/id/eprint/6180
DOI:	10.1007/s00414-021-02508-z

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