Association between promoter methylation of cyclooxygenase-2 and expression, and precancerous gastric lesions in a high-risk population / 中华预防医学杂志
Chinese Journal of Preventive Medicine
;
(12): 571-575, 2009.
Artigo
em Chinês
| WPRIM
| ID: wpr-316134
ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the relationship between cyclooxygenase-2 (COX-2) methylation and expression, and precancerous gastric lesions.</p><p><b>METHODS</b>Methylation status of COX-2 was evaluated by quantitative denaturing high performance liquid chromatography (DHPLC) in 1201 subjects with different gastric lesions. COX-2 expression was assessed by immunohistochemistry and Helicobacter pylori (H pylori) infection status was determined by 13C-urea breath test (13 C-UBT).</p><p><b>RESULTS</b>The percent of COX-2 methylation was increased steadily with the severity of gastric lesions, showing 10.6% of which with superficial gastritis/chronic atrophic gastritis (SG/CAG), 11.8% with intestinal metaplasia (IM) and 13.8% with indefinite dysplasia/dysplasia (Ind DYS/DYS) (chi2 = 8.312, P = 0.016). Stratified analysis indicated that the percents of COX-2 methylation in subjects with H pylori negative still increased with the severity of gastric lesions,of 8.8% in SG/CAG, 10.6% in IM and 14.1% in Ind DYS/DYS (chi2 = 6.629, P= 0.036). Moreover,the methylated proportion of COX-2 was negatively associated with the expression in gastric lesions, from 13.3% with mild expression to 7.6% with strong expression (chi2 = 10.400, P = 0.015).</p><p><b>CONCLUSION</b>Our findings indicated that COX-2 methylation was significantly associated with precancerous gastric lesions and H pylori infection, suggesting that promoter methylation of COX-2 might play an important role in the progression of gastric lesions.</p>
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Patologia
/
Gastropatias
/
China
/
Epidemiologia
/
Infecções por Helicobacter
/
Regiões Promotoras Genéticas
/
Metilação de DNA
/
Ciclo-Oxigenase 2
/
Mucosa Gástrica
/
Genética
Tipo de estudo:
Estudo de etiologia
Limite:
Adulto
/
Feminino
/
Humanos
/
Masculino
País/Região como assunto:
Ásia
Idioma:
Chinês
Revista:
Chinese Journal of Preventive Medicine
Ano de publicação:
2009
Tipo de documento:
Artigo
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