Abstract:
Background:AXL is one of the TAM (TYRO3, AXL and MERTK) receptor tyrosine kinases and may affect numerous immune-related health conditions. However, the role for AXL in asthma, including its epigenetic regulation, has not been extensively studied. Methods:We investigated the association between AXL DNA methylation at birth and risk of childhood asthma symptoms at age 6 years. DNA methylation of multiple CpG loci across the regulatory regions of AXL was measured in newborn bloodspots using the Illumina HumanMethylation450 array on a subset of 246 children from the Children's Health Study (CHS). Logistic regression models were fitted to assess the association between asthma symptoms and DNA methylation. Findings were evaluated for replication in a separate population of 1038 CHS subjects using Pyrosequencing on newborn bloodspot samples. AXL genotypes were extracted from genome-wide data. Results:Higher average methylation of CpGs in the AXL gene at birth was associated with higher risk of parent-reported wheezing, and the association was stronger in girls than in boys. This relationship reflected the methylation status of the gene-body region near the 5' end, for which a 1% higher methylation level was significantly associated with a 72% increased risk of ever having wheezed by 6 years. The association of one CpG locus, cg00360107 was replicated using Pyrosequencing. Increased AXL methylation was also associated with lower mRNA expression level of this gene in lung tissue from the Cancer Genome Atlas (TCGA) dataset. Furthermore, AXL DNA methylation was strongly linked to underlying genetic polymorphisms. Conclusions:AXL DNA methylation at birth was associated with higher risk for asthma-related symptoms in early childhood.
journal_name
Clin Epigeneticsjournal_title
Clinical epigeneticsauthors
Gao L,Millstein J,Siegmund KD,Dubeau L,Maguire R,Gilliland FD,Murphy SK,Hoyo C,Breton CVdoi
10.1186/s13148-017-0421-8subject
Has Abstractpub_date
2017-11-07 00:00:00pages
121eissn
1868-7075issn
1868-7083pii
421journal_volume
9pub_type
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