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Frequency and clinical characteristics of distinct etiologies in patients with Silver-Russell syndrome diagnosed based on the Netchine-Harbison clinical scoring system

Abstract

Silver-Russel syndrome (SRS) is a representative imprinting disorder (ID) characterized by growth failure and diagnosed by clinical features. Recently, international consensus has recommended using the Netchine-Harbison clinical scoring system (NH-CSS) as clinical diagnostic criteria. Loss of methylation of H19/IGF2:intergenic differentially methylated region (H19LOM) and maternal uniparental disomy chromosome 7 (UPD(7)mat) are common etiologies of SRS; however, other IDs, pathogenic variants (PVs) of genes, and pathogenic copy number variants (PCNVs) have been reported in patients meeting NH-CSS. To clarify the frequency and clinical characteristics of each etiology, we conducted (epi)genetic analysis in 173 patients satisfying NH-CSS. H19LOM and UPD(7)mat were identified in 34.1%. PCNVs, other IDs, and PVs were in 15.0%. Patients with all six NH-CSS items were most frequently observed with H19LOM and UPD(7)mat. This study confirmed the suitability of NH-CSS as clinical diagnostic criteria, the (epi)genetic heterogeneity of SRS, and showed the necessity of further discussion regarding the “SRS spectrum”.

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Acknowledgements

We are grateful to the patients and their families for their cooperation. This work was supported by grants from the Japan Agency for Medical Research and Development (AMED) (20ek0109373h0003), the National Center for Child Health and Development (28-6, 2019B-4), the Foundation for Growth Science, and the Takeda Science Foundation.

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Conception and design of study: MK. Acquisition of data: TF, AN, TI, SK, KH-I, KM, SS, KY, MF, TO, and MK. Analysis and/or interpretation of data: TF and AN. Drafting the manuscript: TF and MK. Revising the manuscript critically for important intellectual content: TF and MK. Approval of the version of the manuscript to be published (the names of all authors must be listed): TF, AN, TI, SK, KH-I, KM, SS, KY, MF, TO, and MK.

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Correspondence to Masayo Kagami.

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Fuke, T., Nakamura, A., Inoue, T. et al. Frequency and clinical characteristics of distinct etiologies in patients with Silver-Russell syndrome diagnosed based on the Netchine-Harbison clinical scoring system. J Hum Genet (2022). https://doi.org/10.1038/s10038-022-01048-7

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  • DOI: https://doi.org/10.1038/s10038-022-01048-7

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