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A Maternal Loss-of-Function Variant in KHDC3L Gene Causes a Range of Adverse Pregnancy Outcomes: A Case Report

Molecular Genetics and Genomic Medicine, ISSN: 2324-9269, Vol: 13, Issue: 1
2025
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Article Description

Background: The KHDC3L gene encodes a component of the subcortical maternal complex (SCMC). Biallelic mutations in this gene cause 5%–10% of biparental hydatidiform moles (BiHM), and a few maternal deletions in KHDC3L have been identified in women with recurrent pregnancy loss (RPL). Method: In this study, we had a patient with a history of 10 pregnancy or neonatal losses, including spontaneous abortions, neonatal deaths, and molar pregnancy. Whole-exome sequencing (WES) was performed for genetic diagnostic testing. Results: We found a homozygous deleterious variant in the start codon of KHDC3L (c. 1A>G, p.M1V), which probably results in non-translation or the production of a truncated protein. Conclusion: This is the first report of a maternal loss-of-function variant in KHDC3L gene in a patient experiencing various types of pregnancy loss. This case report broadens the understanding of KHDC3L's pathogenic variants and phenotypic spectrum, consistent with its crucial role during human pre- and post-implantation development.

Bibliographic Details

Zahra Anvar; Farnoosh Jafarpour; Mohammad Hossein Nasr-Esfahani; Bahia Namavar Jahromi; Andrea Riccio; Maria Vittoria Cubellis

Wiley

Biochemistry, Genetics and Molecular Biology; Medicine

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