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Genetic variations in olfactory receptor gene OR2AG2 in a large multigenerational family with asthma.

Abstract：

:It is estimated from twin studies that heritable factors account for at-least half of asthma-risk, of which genetic variants identified through population studies explain only a small fraction. Multi-generation large families with high asthma prevalence can serve as a model to identify highly penetrant genetic variants in closely related individuals that are missed by population studies. To achieve this, a four-generation Indian family with asthma was identified and recruited for examination and genetic testing. Twenty subjects representing all generations were selected for whole genome genotyping, of which eight were subjected to exome sequencing. Non-synonymous and deleterious variants, segregating with the affected individuals, were identified by exome sequencing. A prioritized deleterious missense common variant in the olfactory receptor gene OR2AG2 that segregated with a risk haplotype in asthma, was validated in an asthma cohort of different ethnicity. Phenotypic tests were conducted to verify expected deficits in terms of reduced ability to sense odors. Pathway-level relevance to asthma biology was tested in model systems and unrelated human lung samples. Our study suggests that OR2AG2 and other olfactory receptors may contribute to asthma pathophysiology. Genetic studies on large families of interest can lead to efficient discovery.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Chakraborty S,Dakle P,Sinha A,Vishweswaraiah S,Nagori A,Salimath S,Prakash YS,Lodha R,Kabra SK,Ghosh B,Faruq M,Mahesh PA,Agrawal A

doi

10.1038/s41598-019-54718-6

subject

Has Abstract

pub_date

2019-12-13 00:00:00

pages

19029

issue

1

issn

2045-2322

pii

10.1038/s41598-019-54718-6

journal_volume

9

pub_type

杂志文章

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