Compound heterozygous WNT10A missense variations exacerbated the tooth agenesis caused by hypohidrotic ectodermal dysplasia

© 2024. The Author(s)..

BACKGROUND: The aim of this study was to analyse the differences in the phenotypes of missing teeth between a pair of brothers with hypohidrotic ectodermal dysplasia (HED) and to investigate the underlying mechanism by comparing the mutated gene loci between the brothers with whole-exome sequencing.

METHODS: The clinical data of the patients and their mother were collected, and genomic DNA was extracted from peripheral blood samples. By Whole-exome sequencing filtered for a minor allele frequency (MAF) ≤0.05 non-synonymous single-nucleotide variations and insertions/deletions variations in genes previously associated with tooth agenesis, and variations considered as potentially pathogenic were assessed by SIFT, Polyphen-2, CADD and ACMG. Sanger sequencing was performed to detect gene variations. The secondary and tertiary structures of the mutated proteins were predicted by PsiPred 4.0 and AlphaFold 2.

RESULTS: Both brothers were clinically diagnosed with HED, but the younger brother had more teeth than the elder brother. An EDA variation (c.878 T > G) was identified in both brothers. Additionally, compound heterozygous variations of WNT10A (c.511C > T and c.637G > A) were identified in the elder brother. Digenic variations in EDA (c.878 T > G) and WNT10A (c.511C > T and c.637G > A) in the same patient have not been reported previously. The secondary structure of the variant WNT10A protein showed changes in the number and position of α-helices and β-folds compared to the wild-type protein. The tertiary structure of the WNT10A variant and molecular simulation docking showed that the site and direction where WNT10A binds to FZD5 was changed.

CONCLUSIONS: Compound heterozygous WNT10A missense variations may exacerbate the number of missing teeth in HED caused by EDA variation.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:24

Enthalten in:

BMC oral health - 24(2024), 1 vom: 27. Jan., Seite 136

Sprache:

Englisch

Beteiligte Personen:

Liu, Yiting [VerfasserIn]
Sun, Jing [VerfasserIn]
Zhang, Caiqi [VerfasserIn]
Wu, Yi [VerfasserIn]
Ma, Siyuan [VerfasserIn]
Li, Xuechun [VerfasserIn]
Wu, Xiaoshan [VerfasserIn]
Gao, Qingping [VerfasserIn]

Links:

Volltext

Themen:

Development
Digenic variations
EDA
Hypohidrotic ectodermal dysplasia
Journal Article
Tooth agenesis
WNT10A
WNT10A protein, human
Wnt Proteins

Anmerkungen:

Date Completed 29.01.2024

Date Revised 30.01.2024

published: Electronic

Citation Status MEDLINE

doi:

10.1186/s12903-024-03888-5

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM367714027