AVITI sequencing of a four-generation CEPH/Utah pedigree confirms low mutation rates at homopolymers and short tandem repeats.

AVITI sequencing (Element Biosciences) applied to a multigenerational CEPH/Utah pedigree — precise quantification of mutation rates at STR and homopolymer loci

AVITI sequencing (Element Biosciences) applied to a four-generation CEPH/Utah pedigree — a gold-standard reference for mutation rate studies — confirms low de novo mutation rates at homopolymers and short tandem repeats (STRs). These loci are among the most mutable and difficult to call accurately in clinical sequencing. The resulting benchmark data are directly applicable to evaluating STR and homopolymer caller accuracy in diagnostic contexts, including pathogenic repeat expansions.

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This benchmark on a globally recognized multigenerational reference pedigree is a valuable resource for diagnostic laboratories. Precise quantification of STR/homopolymer mutation rates enables distinguishing technical artifacts from true de novo mutations — a real clinical challenge for pathogenic repeat expansions (HTT, FMR1, DMPK...). The data also validate AVITI technology as a competitive alternative for clinical diagnostics.

Clinical impact : 2/3 · Evidence strength : 3/3 · Novelty : 2/2 · Sample size : 1/1 · Journal quality : 1/1 → Total : 9/10