RESUMO
BACKGROUND/AIMS: Matrix metallopeptidase (MMP) is known to be involved in tumor invasion and metastasis of cancer. This study investigated the association of MMP7 rs11568818, MMP8 rs11225395, MMP9 rs17576 and rs2250889 with gastric cancer (GC) development and lymph node metastasis (LNM). METHODS: Samples were obtained from 326 chronic gastritis (CG) and 153 GC patients and genotyped by using the GoldenGate(R) method. Chi-square test was performed to identify the difference of allele distribution between each group (CG vs. GC; CG vs. with LNM GC). The associations of genotype with risk of GC and LNM were estimated by odds ratio and the 95% confidence interval was calculated by logistic regression adjusting for age and sex. RESULTS: The allele and genotype frequencies of MMP7 rs11568818, MMP8 rs11225395, MMP9 rs17576 and rs2250889 were not associated with the development of GC and LNM. CONCLUSIONS: In summary, MMP7 rs11568818, MMP8 rs11225395 MMP9 rs17576 and rs2250889 were not associated with the GC development and LNM in Korean population.
Assuntos
Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Fatores Etários , Alelos , Doença Crônica , Genótipo , Modelos Logísticos , Metástase Linfática , Metaloproteinase 7 da Matriz/genética , Metaloproteinase 8 da Matriz/genética , Metaloproteinase 9 da Matriz/genética , Estadiamento de Neoplasias , Razão de Chances , Polimorfismo de Nucleotídeo Único , Fatores de Risco , Fatores Sexuais , Neoplasias Gástricas/genéticaRESUMO
The observation that human matrix metalloproteinase (MMP)-8 is over-expressed in ectatic bronchi in patients with bronchiectasis suggests that polymorphisms altering the expression of MMP-8 may contribute to the susceptibility to development of bronchiectasis. We evaluated the association between the presence of bronchiectasis in a Korean population and two single nucleotide polymorphisms (SNPs) (-799C/T and -381A/G) on the promoter region of the MMP-8 gene that are reported to alter the promoter activity and thereby the gene expression. Genotyping through polymerase chain reaction (PCR) and subsequent automatic sequencing was done in 167 patients with bronchiectasis and their age-, sex-matched healthy controls to reveal that only -799C/T is polymorphic among Koreans. In the patient group with bronchiectasis, the frequency of -799C/C, C/T, and T/T genotypes were 41.9%, 49.7%, and 8.4%, respectively. A similar distribution was observed in the control group: C/C (49.7%), C/T (43.1%), and T/T (7.2%) (p=0.36). In subgroup analysis, no significant difference was observed among the patients according to; the extent of disease (p=0.76), colonization of microorganisms (p=0.56), or association of mycobacteria (p=0.17). From these results, we conclude that -799C/T on the promoter region of MMP-8 lacks association with development of bronchiectasis in Koreans.