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Orthognathic surgery induces genomewide changes longitudinally in DNA methylation in saliva
Author(s) -
Yamaguchi Tetsutaro,
Hosomichi Kazuyoshi,
Takahashi Masahiro,
Haga Shugo,
Nakawaki Takatoshi,
Hikita Yu,
Maki Koutaro,
Tajima Atsushi
Publication year - 2019
Publication title -
oral diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.953
H-Index - 87
eISSN - 1601-0825
pISSN - 1354-523X
DOI - 10.1111/odi.12998
Subject(s) - orthognathic surgery , saliva , dna methylation , cpg site , medicine , methylation , bioinformatics , dentistry , genetics , biology , dna , gene , gene expression
Objective Orthognathic surgery dramatically changes morphology of the maxillofacial deformity and improves the malocclusion morphologically and functionally. We investigated the influence of orthognathic surgery on genomewide DNA methylation in saliva. Methods Saliva was obtained from nine patients undergoing orthognathic surgery and two healthy reference individuals before and 3 months after orthognathic surgery. Genomewide DNA methylation profiling of saliva (341,482 CpG dinucleotides) was conducted using Infinium HumanMethylation450 BeadChips. Results Comparison between pre‐ and postsurgery saliva samples revealed significant changes in DNA methylation patterns at 2,381 CpG sites ( p < 0.01) with suggestive significance. The differentially methylated probe sets were significantly associated with the cancer pathway ( p = 2.8 × 10 −7 ; a false discovery rate q ‐value = 3.7 × 10 −4 ) and PI3K‐Akt signalling pathway ( p = 2.4 × 10 −5 ; a false discovery rate q ‐value = 3.1 × 10 −2 ). Conclusion Pathway enrichment analysis of genes with suggestive significance demonstrated that altered DNA methylation in saliva of patients undergoing orthognathic surgery, possibly as a response to surgical stress or bone injury. Further studies with a large sample size and long‐term observation are needed to validate the phenomena identified in this study.