Polymorphisms of matrix metalloproteinase-7 and -9 are associated with oral tongue squamous cell carcinoma

Abstract Matrix degradation is an important event in the progression, invasion and metastasis of malignant head and neck lesions. Imbalances, mutations and polymorphisms of MMPs and their inhibitors are observed in several cancer subtypes. The aim of this study was to evaluate the association of the MMP-7 gene promoter (181 A/G) and MMP-9 (-1562 C/T) polymorphisms in oral tongue squamous cell carcinoma (OTSCC). MMP-7 (rs11568818) and MMP-9 (rs3918242) single-nucleotide polymorphisms (SNPs) were genotyped by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis in 71 cases of OTSCC. Normal tissue specimens were obtained from 60 healthy volunteers to serve as the control. The MMP-7 G allele and MMP-9 T allele were more frequent in the OTSCC group than the control group, but only when these two SNPs were taken together was a significant association found with the nodal metastasis of OTSCC (p < 0.001). Based on our results, SNPs in the promoter region of MMP-7 and MMP-9 appear to be associated with greater risk of developing OTSCC, and with a higher propensity to form metastatic tumors. In this respect, molecular studies investigating polymorphisms may be useful in predicting tumor behavior.

Association of mmp-7 -181A>G polymorphism with colorectal cancer and gastric cancer susceptibility: a systematic review and meta-analysis / Associação do polimorfismo mmp-7 -181a>G com câncer colorretal e suscetibilidade ao câncer gástrico: revisão sistemática e metanálise

ABSTRACT Introduction: The matrix metalloproteinase-7 (MMP-7) gene -181A>G polymorphism has been reported to be associated with colorectal cancer (CRC) and gastric cancer (GC) susceptibility, yet the results of these previous results have been inconsistent or controversial. Aim: To elaborate a meta-analysis to assess the association of -181A>G polymorphism of MMP-7 with CRC and GC risk. Methods: Published literature evaluating the association from PubMed, Web of Science, Google Scholar and other databases were retrieved up to April 25, 2018. Pooled odds ratio (OR) and 95% confidence interval (CI) were calculated using random- or fixed-effects model. Results: A total of 19 case-control studies, which included eleven studies on CRC (2,169 CRC cases and 2,346 controls) and eight studies on GC (1,545 GC cases and 2,366 controls) were identified. There was a significant association between MMP-7 -181A>G polymorphism and GC risk under the homozygote model (GG vs. AA: OR=1.672, 95% CI 1.161-2.409, p=0.006) and the recessive model (GG vs. GA+AA: OR=1.672, 95% CI 1.319-2.554, p=0.001), but not with CRC. By subgroup analysis based on ethnicity, an increased risk of CRC and GC was found only among Asians. Conclusions: This meta-analysis suggests that MMP-7 -181A>G polymorphisms is associated with GC risk, but not with CRC. However, our results clearly showed that the MMP-7 -181A>G polymorphism significantly increased the risk of CRC only in Asians.

RESUMO Introdução: O polimorfismo da matriz metaloproteinase-7 (MMP-7) -181A>G tem sido relatado como associado à suscetibilidade dos cânceres colorretal (CRC) e gástrico (GC), mas os resultados desses estudos anteriores foram inconsistentes ou controversos. Objetivo: Elaborar metanálise para avaliar a associação do polimorfismo -181A> G da MMP-7 com o risco de CRC e GC. Métodos: Revisão da literatura publicada avaliando essa associação no PubMed, Web of Science, Google Acadêmico e outras bases de dados até 25 de abril de 2018. Odds ratio (OR) e o intervalo de confiança de 95% (IC) foram calculados usando dados aleatórios ou modelo de efeitos fixos. Resultados: Um total de 19 estudos caso-controle, que incluíram 11 trabalhos sobre CRC (2.169 casos de CCR e 2.346 controles) e oito sobre GC (1.545 casos de GC e 2.366 controles) foram identificados. Houve associação significativa entre o polimorfismo MMP-7 -181A>G e o risco de GC sob o modelo homozigoto (GG vs. AA: OR=1,672, IC 95% 1,161-2,409, p=0,006) e o modelo recessivo (GG vs. GA + AA: OR=1,672, IC 95% 1,319-2,554, p=0,001), mas não com CRC. Por análise de subgrupos com base na etnia, um risco aumentado de CRC e GC foi encontrado apenas entre os asiáticos. Conclusões: Esta metanálise sugere que os polimorfismos MMP-7 -181A>G estão associados ao risco de GC, mas não ao CRC. No entanto, estes resultados mostraram claramente que o polimorfismo MMP-7 -181A>G aumentou significativamente o risco de CRC apenas em asiáticos.

Association of matrix metalloproteinase -7 (-181A/G) promoter polymorphism in chronic pancreatitis.

Background & objectives: Chronic pancreatitis is progressive and irreversible destruction of the pancreas. Matrix metalloproteinase-7 (MMP-7) is a secreted matrilysin, which contributes to angiogenesis and breakdown of basement membranes of pancreatic tissues. The present study was aimed to investigate the association of MMP-7 −181A/G (rs11568818) gene promoter polymorphism in patients with chronic pancreatitis. Methods: A total of 100 chronic pancreatitis patients and 150 unrelated healthy individuals were included in this case control study. The genotyping of the MMP-7 gene (− 181 A/G) (rs11568818) was carried out based on PCR-RFLP. The serum levels of MMP-7 were determined by ELISA. Association between genotypes and chronic pancreatitis was examined by odds ratio (OR) with 95% confidence interval (CI). Results: The frequencies of the genotypes in promoter of MMP-7 were AA 49 per cent, AG 25 per cent and GG 26 per cent in chronic pancreatitis patients and AA 53 per cent, AG 38 per cent and GG 9 per cent in control subjects. Frequency of MMP-7 −181GG genotype and − 181G allele was significantly associated with chronic pancreatitis compared to healthy subjects [OR = 1.58 (95% CI: 1.06 –2.36), p =0.019]. There was no significant difference in the serum MMP-7 levels in the patients compared to control subjects. Interpretation &conclusions: The present study revealed a significant association of MMP-7 -181A/G (rs11568818) GG genotype with chronic pancreatitis patients, indicating its possible association with the disease.

A new method of identifying the peripheral blood and the menstrual blood / 法医学杂志

OBJECTIVE@#To explore the tissue-specific gene expressions of the peripheral blood and the menstrual blood, and to search some specific factors to establish an effective method for identifying the peripheral blood and the menstrual blood.@*METHODS@#The specific products of the peripheral blood and the menstrual blood were detected by RT-PCR and separated by electrophoretic technology.@*RESULTS@#Beta-spectrin (SPTB) as one specific marker of peripheral blood and 18S rRNA as a kind of the housekeeping gene were expressed in both the peripheral blood and the menstrual blood. However, matrix metalloproteinase 7 (MMP7) as one specific marker of menstrual blood and human beta defensin 1 (HBD1) as one specific marker of vaginal discharge were only found in the menstrual blood.@*CONCLUSION@#There are differences of specific gene expressions between the peripheral blood and the menstrual blood. They could be accurately distinguished from each other by using the combination of fluorescence technology and RT-PCR to detect the specific identification of mRNA.

Triptolide inhibits ovarian cancer cell invasion by repression of matrix metalloproteinase 7 and 19 and upregulation of E-cadherin

Triptolide, a compound extracted from the traditional Chinese medicine preparation of Tripterygium wilfordii Hook F., has been reported to have anti-inflammatory and anti-cancer activities. However, its effect on ovarian cancer invasion is unknown. We observed that MMP7 and MMP19 expression increased in ovarian cancer tissue. Triptolide treatment inhibited the migration and invasion of ovarian cancer cells SKOV3 and A2780 at the concentration of 15 nM. We also observed that triptolide suppressed MMP7 and MMP19 promoter activity in a dose-dependent manner, down-regulating the expressions of these promoters on mRNA and protein level. Moreover, triptolide enhanced E-cadherin expression in ovarian cancer cells. In vivo, triptolide inhibited tumor formation and metastasis in nude mice, and suppressed MMP7 and MMP19 expression; it also enhanced E-cadherin expression in tumor in a dose-dependent manner. Over expression of MMP7 and MMP19, or suppression of E-cadherin expression partially abolished the inhibitory effect of triptolide on invasion of ovarian cancer cells. To summarize, triptolide significantly inhibited the migration and invasion of ovarian cancer cells by suppression of MMP7 and MMP19 and up-regulation of E-cadherin expression. This study shows that triptolide is a good candidate for the treatment of ovarian cancer and reduction of metastasis.

Study on Association between Single Nucleotide Polymorphisms of MMP7, MMP8, MMP9 Genes and Development of Gastric Cancer and Lymph Node Metastasis / 대한소화기학회지

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.