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Related Experiment Video

Updated: Dec 29, 2025

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila

Published on: August 20, 2019

LEF1 haploinsufficiency causes ectodermal dysplasia.

Jonathan Lévy¹, Yline Capri¹, Myriam Rachid¹

¹Genetics Department, AP-HP, Robert-Debré University Hospital, Paris, France.

Clinical Genetics

|February 6, 2020

Summary

This summary is machine-generated.

Genetic variations in the LEF1 gene cause ectodermal dysplasia, leading to severe dental and hair abnormalities. This study identifies LEF1 haploinsufficiency as a cause of this rare genodermatosis in humans.

Keywords:

LEF1 4q25 ectodermal dysplasia microdeletion oligodontia

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Detection of Nuclear Blebbing and DNA Leakage in Mammalian Cells by Immunofluorescence

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Published on: January 17, 2025

Area of Science:

Genetics
Developmental Biology
Dermatology

Background:

Ectodermal dysplasias are genetic disorders affecting ectoderm-derived structures.
Key signaling pathways, including Wnt/β-catenin, regulate ectodermal development.
The lymphoid enhancer-binding factor 1 (LEF1) is crucial for Wnt/β-catenin pathway activation.

Purpose of the Study:

To investigate the role of LEF1 in human ectodermal dysplasia.
To identify genetic variations associated with ectodermal dysplasia phenotypes.
To delineate the clinical presentation of LEF1-related ectodermal dysplasia.

Main Methods:

Analysis of two unrelated patients with de novo 4q25 deletion encompassing the LEF1 gene.
Clinical examination for ectodermal dysplasia features.
Genetic analysis to confirm deletion and assess LEF1 involvement.

Main Results:

Both patients presented with severe oligodontia, hypotrichosis, and hypohidrosis.
Observed features were consistent with hypohidrotic ectodermal dysplasia.
Taurodontism and unique alveolar bone defects were noted.
No previous pathogenic variants in LEF1 were reported in humans.

Conclusions:

LEF1 haploinsufficiency is implicated in human ectodermal dysplasia.
This study expands the known genetic causes of ectodermal dysplasia.
The findings highlight LEF1's critical role in ectodermal appendage development.