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2021-11-23

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cc-by (c) Santos Gómez, Ana et al., 2021
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/183474

Paradigmatic de novo GRIN1 variants recapitulate pathophysiological mechanisms underlying GRIN1-related disorder clinical spectrum

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https://doi.org/10.3390/ijms222312656

Abstract

Background: GRIN-related disorders (GRD), the so-called grinpathies, is a group of rare encephalopathies caused by mutations affecting GRIN genes (mostly GRIN1, GRIN2A and GRIN2B genes), which encode for the GluN subunit of the N-methyl D-aspartate (NMDA) type ionotropic glutamate receptors. A growing number of functional studies indicate that GRIN-encoded GluN1 subunit disturbances can be dichotomically classified into gain- and loss-of-function, although intermediate complex scenarios are often present. Methods: In this study, we aimed to delineate the structural and functional alterations of GRIN1 disease-associated variants, and their correlations with clinical symptoms in a Spanish cohort of 15 paediatric encephalopathy patients harbouring these variants. Results: Patients harbouring GRIN1 disease-associated variants have been clinically deeplyphenotyped. Further, using computational and in vitro approaches, we identified different critical checkpoints affecting GluN1 biogenesis (protein stability, subunit assembly and surface trafficking) and/or NMDAR biophysical properties, and their association with GRD clinical symptoms. Conclusions: Our findings show a strong correlation between GRIN1 variants-associated structural and functional outcomes. This structural-functional stratification provides relevant insights of genotypephenotype association, contributing to future precision medicine of GRIN1-related encephalop

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Neurotransmissió, Neurobiologia del desenvolupament

Subject (English)

Neural transmission, Developmental neurobiology

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Articles publicats en revistes (Biomedicina)
Articles publicats en revistes (IDIBAPS: Institut d'investigacions Biomèdiques August Pi i Sunyer)
Articles publicats en revistes (Institut de Neurociències (UBNeuro))

Citation

SANTOS GÓMEZ, Ana, et al. Paradigmatic de novo GRIN1 variants recapitulate pathophysiological mechanisms underlying GRIN1-related disorder clinical spectrum. International Journal of Molecular Sciences. 2021. Vol. 22, num. 23, pags. 12656. ISSN 1661-6596. [consulted: 17 of August of 2026]. Available at: https://hdl.handle.net/2445/183474

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