Genetic study of heart defects and autism finds new genes responsible

M-DATA workflow. Credit: Yuhan Xie, CC-BY 4.0 (creativecommons.org/licenses/by/4.0/)

Researchers have identified nearly two dozen genes that contribute to heart defects by studying genetic data from people born with congenital heart disease or autism. Hongyu Zhao of Yale University and colleagues have developed a new algorithm to analyze genetic data for associated conditions, which they describe in a new article published on November 4 in the journal PLOS Genetics.

Multiple diseases that start early in life appear to be linked to mutations in the same genes. Recent research on de novo mutations – new mutations that appear in children that were not present in parents – has shown a link between congenital heart defects and autism. However, sequencing de novo mutations is expensive, so small studies of individual diseases have limited power to identify genes that increase a person’s risk of disease.

In the new study, the researchers developed an algorithm called M-DATA (Multi-trait De novo Mutation Association Assay with Annotations) that combines sequencing data from people with related conditions to identify genes that contribute to the disease. They applied the new method to genetic data from people with congenital heart disease or autism and were able to identify 23 congenital heart disease genes, 12 of which were previously unknown.

The researchers conclude that M-DATA is more effective at identifying genes that increase a person’s risk than analyzes focusing on a single disease. Indeed, instead of analyzing a small number of genomes of affected individuals, M-DATA analyzes a larger number of combined genomes of several groups of people. The new method can help researchers identify previously unknown genes linked to the disease and improve our understanding of the cause and potential treatment of different conditions.

Zhao adds: “By jointly analyzing de novo mutations due to congenital heart disease (CHD) and autism, we have identified new genes that may play an important role in explaining the common genetic etiology of coronary heart disease and autism. “

Yuhan Xie, the principal research student, says, “As a student of biostatistics it is very motivating to find what could be meaningful for patients and their families. ”


Rare hereditary variants of previously unsuspected genes may confer significant risk of autism


More information:
Xie Y, Li M, Dong W, Jiang W, Zhao H (2021) M-DATA: A statistical approach to jointly analyze de novo mutations for several traits. PLoS Genet 17 (11): e1009849. doi.org/10.1371/journal.pgen.1009849

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Quote: Genetic study of heart defects and autism finds new responsible genes (2021, November 4) retrieved November 8, 2021 from https://medicalxpress.com/news/2021-11-genetic-heart-defects-autism -genes.html

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