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Case Report: A de novo Variant in NALCN Associated With CLIFAHDD Syndrome in a Chinese Infant.

ABSTRACT:

Background

The NALCN encodes a sodium ion leak channel that regulates nerve-resting conductance and excitability. NALCN variants are associated with two neurodevelopmental disorders, one is CLIFAHDD (autosomal dominant congenital contractures of the limbs and face, hypotonia, and developmental delay, OMIM #616266) and another is IHPRF (infantile hypotonia with psychomotor retardation, and characteristic facies 1, OMIM #615419).

Case presentation

In the current study, a Chinese infant that manifested abnormal facial features, adducted thumbs, and neurodevelopmental retardation was diagnosed with CLIFAHDD syndrome. A trio-based whole-exome sequencing revealed that the infant harbored a de novo variant of the NALCN gene (c.4300A>G, p.I1434V).

Conclusions

Our findings further enriched the variant spectrum of the NALCN gene and may expand the clinical range of NALCN-related disorders.

SUBMITTER: Liao Z

PROVIDER: S-EPMC9326163 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature

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Case Report: A de novo Variant in NALCN Associated With CLIFAHDD Syndrome in a Chinese Infant.

Liao Zhenyu Z Liu Yali Y Wang Yimin Y Lu Qin Q Peng Yu Y Liu Qingsong Q

Frontiers in pediatrics 20220713

<h4>Background</h4>The NALCN encodes a sodium ion leak channel that regulates nerve-resting conductance and excitability. NALCN variants are associated with two neurodevelopmental disorders, one is CLIFAHDD (autosomal dominant congenital contractures of the limbs and face, hypotonia, and developmental delay, OMIM #616266) and another is IHPRF (infantile hypotonia with psychomotor retardation, and characteristic facies 1, OMIM #615419).<h4>Case presentation</h4>In the current study, ...[more]

PMID: 35911839

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