Identifying phenotypic expansions for congenital diaphragmatic hernia plus (CDH+) using DECIPHER data.

Area of Science:

• Genetics
• Developmental Biology
• Medical Research

Background:

• Congenital diaphragmatic hernia (CDH) is a birth defect with an often unknown molecular cause.
• Understanding genes involved in diaphragm development is key to identifying CDH etiologies.
• CDH can occur alone or with other birth defects (CDH+).

Purpose of the Study:

• To identify genes potentially involved in diaphragm development using data from individuals with CDH+.
• To discover new phenotypic expansions associated with CDH.
• To leverage public databases for genetic research in rare diseases.

Main Methods:

• Analysis of clinical and molecular data from 36 individuals with CDH+ in the DECIPHER database.
• Identification of deleterious sequence or copy number variants in candidate genes.
• Validation of gene function through expression data in developing mouse diaphragms and machine learning algorithms.

Main Results:

• Deleterious variants in CREBBP, SMARCA4, UBA2, and USP9X were identified in individuals with CDH+.
• These genes are expressed in the developing mouse diaphragm.
• The identified genes show similarity to known CDH-associated genes.

Conclusions:

• CREBBP, SMARCA4, UBA2, and USP9X are suggested to play a role in diaphragm development.
• Public databases like DECIPHER are valuable for identifying new CDH-related genes and phenotypes.
• Further research into these genes may improve understanding and diagnosis of CDH.