start-ver=1.4
cd-journal=joma
no-vol=17
cd-vols=
no-issue=9
article-no=
start-page=1955
end-page=1965
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2011
dt-pub=201109
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=DNA Methylation of Colon Mucosa in Ulcerative Colitis Patients: Correlation with Inflammatory Status
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Background: Although DNA methylation of colonic mucosa in ulcerative colitis (UC) has been suggested, the majority of published reports indicate the correlation between methylation of colon mucosa and occurrence of UC-related dysplasia or cancer without considering the mucosal inflammatory status. The aim of this study was to verify whether mucosal inflammation-specific DNA methylation occurs in the colon of UC. 

Methods: Of 15 gene loci initially screened, six loci (ABCB1, CDH1. ESR1, GDNF, HPP1, and MYOD1) methylated in colon mucosa of UC were analyzed according to inflammatory status using samples from 28 surgically resected UC patients. 

Results: Four of six regions (CDH1, GDNF, HPP1, and MYOD1) were more highly methylated in the active inflamed mucosa than in the quiescent mucosa in each UC patient (P = 0.003, 0.0002, 0.02, and 0.048, respectively). In addition, when the methylation status of all samples taken from examined patients was stratified according to inflammatory status, methylation of CDHI and GDNF loci was significantly higher in active inflamed mucosa than in quiescent mucosa (P = 0.045 and 0.002, respectively). Multiple linear regression analysis revealed that active inflammation was an independent factor of methylation for CDHI and GDNF. DNA methyltransferase 1 and 3b were highly expressed in colon epithelial cells with active mucosa] inflammation, suggesting their involvement in inflammation-dependent methylation. 

Conclusions: Methylation in colonic mucosa of UC was correlated with mucosal inflammatory status, suggesting the involvement of methylation due to chronic active inflammation in UC carcinogenesis.
en-copyright=
kn-copyright=

en-aut-name=SaitoShunsuke
en-aut-sei=Saito
en-aut-mei=Shunsuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=KatoJun
en-aut-sei=Kato
en-aut-mei=Jun
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=HiraokaSakiko
en-aut-sei=Hiraoka
en-aut-mei=Sakiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=HoriiJoichiro
en-aut-sei=Horii
en-aut-mei=Joichiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

en-aut-name=SuzukiHideyuki
en-aut-sei=Suzuki
en-aut-mei=Hideyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=

en-aut-name=HigashiReiji
en-aut-sei=Higashi
en-aut-mei=Reiji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=

en-aut-name=KajiEisuke
en-aut-sei=Kaji
en-aut-mei=Eisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=

en-aut-name=KondoYoshitaka
en-aut-sei=Kondo
en-aut-mei=Yoshitaka
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=

en-aut-name=YamamotoKazuhide
en-aut-sei=Yamamoto
en-aut-mei=Kazuhide
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=

affil-num=1
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gastroenterol & Hepatol

affil-num=2
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gastroenterol & Hepatol

affil-num=3
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gastroenterol & Hepatol

affil-num=4
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gastroenterol & Hepatol

affil-num=5
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gastroenterol & Hepatol

affil-num=6
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gastroenterol & Hepatol

affil-num=7
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gastroenterol & Hepatol

affil-num=8
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gastroenterol Surg Transplant & Surg Oncol

affil-num=9
en-affil=
kn-affil=Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gastroenterol & Hepatol
en-keyword=ulcerative colitis
kn-keyword=ulcerative colitis
en-keyword=inflammation
kn-keyword=inflammation
en-keyword=methylation
kn-keyword=methylation
END