The use of precision diagnostics for monogenic diabetes: a systematic review and expert opinion

Rinki Murphy, Kevin Colclough, Toni I. Pollin, Jennifer M. Ikle, Pernille Svalastoga, Kristin A. Maloney, Cécile Saint-Martin, Janne Molnes, Paul W. Franks, Stephen S. Rich, Robert Wagner, Tina Vilsbøll, Kimberly K. Vesco, Miriam S. Udler, Tiinamaija Tuomi, Arianne Sweeting, Emily K. Sims, Jennifer L. Sherr, Robert K. Semple, Rebecca M. ReynoldsMaria J. Redondo, Leanne M. Redman, Richard E. Pratley, Rodica Pop-Busui, Wei Perng, Ewan R. Pearson, Susan E. Ozanne, Katharine R. Owen, Richard Oram, Rinki Murphy, Viswanathan Mohan, Shivani Misra, James B. Meigs, Nestoras Mathioudakis, Chantal Mathieu, Ronald C.W. Ma, Ruth J.F. Loos, Siew S. Lim, Lori M. Laffel, Soo Heon Kwak, Jami L. Josefson, John J. Nolan, Mariam Nakabuye, Mathias Ried-Larsen, Torben Hansen, Marta Guasch-Ferré, Christoffer Clemmensen, Mette K. Andersen, Anne Cathrine B. Thuesen, Jordi Merino, ADA/EASD PMDI

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Abstract

Background: Monogenic diabetes presents opportunities for precision medicine but is underdiagnosed. This review systematically assessed the evidence for (1) clinical criteria and (2) methods for genetic testing for monogenic diabetes, summarized resources for (3) considering a gene or (4) variant as causal for monogenic diabetes, provided expert recommendations for (5) reporting of results; and reviewed (6) next steps after monogenic diabetes diagnosis and (7) challenges in precision medicine field. Methods: Pubmed and Embase databases were searched (1990-2022) using inclusion/exclusion criteria for studies that sequenced one or more monogenic diabetes genes in at least 100 probands (Question 1), evaluated a non-obsolete genetic testing method to diagnose monogenic diabetes (Question 2). The risk of bias was assessed using the revised QUADAS-2 tool. Existing guidelines were summarized for questions 3-5, and review of studies for questions 6-7, supplemented by expert recommendations. Results were summarized in tables and informed recommendations for clinical practice. Results: There are 100, 32, 36, and 14 studies included for questions 1, 2, 6, and 7 respectively. On this basis, four recommendations for who to test and five on how to test for monogenic diabetes are provided. Existing guidelines for variant curation and gene-disease validity curation are summarized. Reporting by gene names is recommended as an alternative to the term MODY. Key steps after making a genetic diagnosis and major gaps in our current knowledge are highlighted. Conclusions: We provide a synthesis of current evidence and expert opinion on how to use precision diagnostics to identify individuals with monogenic diabetes.

Original languageEnglish
Article number136
JournalCommunications Medicine
Volume3
Issue number1
Number of pages24
ISSN2730-664X
DOIs
Publication statusPublished - 2023

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