Type 2 & other diabetes

Variants of Unknown Significance in Maturity-Onset Diabetes of the Young: High Rate of Conundrum Resolution via Variants of Unknown Significance Reanalysis

Horm Res PaediatrPublished Retrospective cohort study

Authors' conclusion

In sum, iterative reanalyzing the genetic data from VUS found during MODY testing may provide high-yield diagnostic information. Further studies are warranted to identify the optimal time and frequency for such analyses.

Study context

Population
Subjects with a maturity-onset diabetes of the young (MODY) clinical diagnosis with variants of unknown significance (VUS) on MODY genes from genetic testing performed >3 years before the study14 unique VUS
Participants
10 subjects
Outcome
Reclassification of previous VUS results on reanalysis
Methodological detailssingle-centre, retrospective chart review
  • Single-centre
  • Retrospective chart review

Main finding

As reported in the abstract

VUS reclassified after reanalysis

Reclassified to a different category

43%

6/14

Reclassified as likely pathogenic (HNF1A)

7%

1/14

Reclassified as benign or likely benign (HNF1A, HNF1B, PDX1)

36%

5/14

Median time between MODY testing and reclassification

8 years

range: 4–10 years

Observational data: associations, not effects.

Original publication

Variants of Unknown Significance in Maturity-Onset Diabetes of the Young: High Rate of Conundrum Resolution via Variants of Unknown Significance Reanalysis. Horm Res Paediatr. Published 28 May 2024. doi:10.1159/000539542

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