Matrix Metalloproteinase Gene Polymorphisms Research Articles

The association between genetic polymorphisms of matrix metalloproteinases and knee osteoarthritis: A systematic review and meta-analysis.

To investigate the linkage of matrix metalloproteinase (MMP) gene polymorphisms with the pathogenesis of knee osteoarthritis (OA). This meta-analysis study systematically retrieved relevant studies from PubMed, Embase, the Cochrane Central, Wanfang Data, CNKI, and SinoMed up to November 2020. Odds ratios (ORs) and 95% confidence intervals (CIs) were used to estimate the association between MMP gene polymorphisms and OA. A total of nine case-control studies comprising 1719 knee OA patients and 1904 controls were included in this meta-analysis. The results revealed that MMP-1-1607 (rs1799750) 1G/2G polymorphism was not significantly associated with knee OA risk in four genetic models (OR (95% CI): allele model: 0.89 (0.57, 1.40), p = .615); dominant mode: 0.82 (0.47, 1.44), p = .486; recessive model: 0.88 (0.49, 1.57), p = .659; homozygote model: 0.79 (0.34, 1.82), p = .576. The association was significant for dominant model of MMP-3 C/T: 1.54 (1.10-2.15), p = .013, especially in Asian ethnicity (1.63 (1.11, 2.39), p = .013). Variants of MMP-13 C/T polymorphism were associated with increased risk of knee OA development based on dominant model: 1.56 (1.19, 2.06), p = .001 and homozygote model: 2.12 (1.44, 3.13), p < .001, and there were significant associations between MMP-13 C/T polymorphism and knee OA risk in Asian ethnicity under different genetic models (all p > .05). Present evidence suggested that the gene polymorphisms of MMP-1-1607 1G/2G may not be associated with the risk of OA. But, the dominant model of MMP-3 and MMP-13 polymorphisms in Asian ethnicity was significantly correlated with knee OA.

Potential genetic polymorphism of matrix metalloproteinase (MMP)-9 in Iranian migraine patients with Toxoplasma gondii infection.

Toxoplasma gondii is an intracellular protozoan parasite that causes neuroinflammation in the brain and a constant need for peripheral leukocyte migration. Matrix metalloproteinase 9 (MMP-9) can play a major role in this neuroinflammation and be implicated in some neurological disorders, such as migraines. Therefore, the genetic polymorphism evaluation of MMP-9 in migraine patients with T. gondii infection was performed. One hundred fourteen migraine patients and 114 healthy controls were evaluated for the presence of anti-Toxoplasma IgG antibodies. Seventy-two migraine patients and 40 healthy controls were randomly selected for assessment of the MMP 9-1562C/T genetic polymorphism. In the preliminary examination, 61 (53.5%) migraine patients and 43 (37.3%) healthy controls were positive for IgG antibodies, with a significant association between T. gondii seropositivity and migraine (OR = 1.90; 95% CI = 1.21-3.223; P = 0.012). Genetic distribution for the polymorphism was not in Hardy-Weinberg equilibrium in cases but showed no significant variation in control groups (P = 0.03 and P = 0.180, respectively). A significant preponderance of the CT + TT genotype was found in migraine subjects compared to controls (P = 0.042) (OR, 1.77, CI, 1.013-2.229). The homozygote muted allele TT had a higher rate in migraine patients (6.9%). There were significant differences in CT + TT genotype between T. gondii positive and negative migraine patients (P = 0.024), but T allele frequencies had no significant variation (OR 1.7 CI, 1.084-2.44 and 0.42 CI, 0.044-3.97, respectively). In conclusion, the results may provide the first evidence for the involvement of the MMP-9 gene polymorphism in the mechanism of migraine pathology following Toxoplasma infection.

MMP-3 gene regulates the carcinogenesis and metabolic process of ovarian cancer, evidence from a Chinese population: Observational study and meta-analysis.

The current investigation aims to explore the relationship between matrix metalloproteinase-3 (MMP-3) gene polymorphism and ovarian cancer (OC) risk. Two hundred forty pathologically confirmed OC patients and 390 healthy controls participated in the present investigation. Polymerase chain reaction-restriction fragment length polymorphism was applied to investigate the present polymorphism. At the same time, the meta-analysis was also performed to comprehensively explore the relationship. Three genotypes (5A/5A, 5A/6A, and 6A/6A) were observed for MMP-3 gene polymorphism. 6A/6A genotype and 6A allele displayed significant increase in OC patients (all P < .05). Meta-analysis found that no significant results (all P > .05). In conclusion, our results indicate that MMP-3 gene polymorphism contributes increased risk to OC for southern Chinese population. And meta-analysis indicates that MMP-3 gene polymorphism contributes no risk to OC in other populations.

Association of MMP7 T > C Gene Variant (rs10502001) and Expression in Chronic Obstructive Pulmonary Disease.

Patients with chronic obstructive pulmonary disease (COPD) have obstructed airflow through their lungs. Single nucleotide polymorphisms in matrix metalloproteinases (MMPs) genes and the risk of COPD have been the subject of numerous studies, with conflicting results. This investigation was conducted to determine whether the MMP7 (T>C) gene variant (rs10502001) was associated with an increased risk of COPD. A case-control study was conducted with 360 subjects (180 healthy controls and 180 COPD cases). The polymerase chain reaction (PCR)-restriction fragment length polymorphism method was used to genotype the SNP rs1050200. mRNA expression of MMP7 was performed using RT-PCR. The genotypic/allelic frequencies and carriage rates of rs10502001 (T>C) polymorphism were evaluated in 180 each of healthy controls and COPD cases. Cases have higher TC/CC genotype frequencies than controls. The "CC" genotype was found to be significantly associated with increased COPD risk (p = 0.016). The "C" allele frequency was higher in cases than in controls and showed significant association with COPD (p = 0.005). The carriage rate frequencies of T(-) and C(+) were significantly higher in cases than in controls (p = 0.031 and 0.047, respectively). MMP7 expression was significantly upregulated (p = 0.001) in COPD cases as compared with the controls. In addition, comparisons of MMP7 expression between the COPD cases with different genotypes showed that the "CC" genotype cases had significantly higher expression than those with "TT" genotype. The present findings showed statistically significant correlation of MMP7 (T>C) polymorphism and expression with COPD. Therefore, MMP7 responsible for degradation of elastin has been strongly linked to the progression of COPD.

Matrix Metalloproteinase-9 Gene Polymorphism in Patients with Hepatocellular Carcinoma

Matrix Metalloproteinase-9 Gene Polymorphism in Patients with Hepatocellular Carcinoma

The Matrix Metalloproteinase-9 Gene Polymorphisms as Risk Factor for Pelvic Organ Prolapse in Balinese Women

The Matrix Metalloproteinase-9 Gene Polymorphisms as Risk Factor for Pelvic Organ Prolapse in Balinese Women

Relationship between interferon-induced transmembrane protein 3 and matrix metalloproteinase-9 gene polymorphisms in patients with hepatocellular carcinoma

BackgroundHepatocellular carcinoma originates from hepatocytes as a result of the effects of numerous genetic variations. Interferon-Induced Transmembrane protein 3 (IFITM3) is involved in the processes of cellular differentiation, apoptosis, cell adhesion, and immune cell regulation. Matrix Metalloproteinase-9 (MMP-9) are zinc dependent endopeptidases that cleave extracellular matrix contents and play an important role in the progression of cancer. ObjectiveThe study aimed to outline the key molecular biology progression in hepatocellular carcinoma and the relationship between hepatocellular cancer and genetic polymorphisms of IFITM3 and MMP-9. MethodsIn total 200 patients with hepatocellular carcinoma patients (n=100) and a control group with Hepatitis C virus (n=100) which collected randomly from the EL-Mansoura oncology center during the interval between June 2020 and October 2021. The expression of MMP-9 and the IFITM3 SNP was investigated. MMP-9 gene polymorphisms were estimated by using PCR-RFLP and IFITM3 gene was detected using DNA sequencing, ELISA was used to measure protein levels of MMP-9 and IFITM3. ResultsThe T allele of MMP-9 was more frequent among patients (n=121) than control subjects (n=71). The C allele of IFITM3 was more frequent among patients (n=112) than control subjects (n=83), polymorphisms of the genes linked to a high risk of disease development, patients of MMP-9 (TT genotype), odd ratio (OR) = 2.63, IFITM3 (CC genotype), OR= 2.43. ConclusionsWe found that the genetic polymorphisms of MMP-9 and IFITM3 are related to the occurrence and development of hepatocellular carcinoma. This study might be utilized in clinical diagnosis and therapy and to provide a baseline for prevention.

Single-nucleotide polymorphisms of matrix metalloproteinase genes are associated with graft fibrosis after kidney transplantation.

Further research needs to be conducted on the role of genetic variables in kidney transplantation fibrosis. In this study, we used next-generation sequencing (NGS) to examine the relationship between matrix metalloproteinase (MMP) genes and single-nucleotide polymorphisms (SNPs) in renal allograft fibrosis. This study comprised 200 patients, whose complete DNA samples were taken. The SNPs in MMP genes were identified using targeted NGS. Hardy-Weinberg equilibrium (HWE) and minor allele frequency (MAF) tests were conducted, followed by a linkage disequilibrium (LD) analysis. Finally, the SNPs and severity of kidney allograft fibrosis were evaluated using different inheritance models. In total, 41 MMP gene-related SNPs were identified using targeted sequencing, and 20 tagger SNPs were retained for further study. The general linear models (GLMs) revealed that sirolimus treatment had a substantial effect on kidney graft fibrosis. The multiple inheritance model analyses revealed that SNP rs9059 of the MMP9 gene was strongly associated with kidney graft fibrosis. The in-vitro experiments showed the MMP9 rs9509 mutation promotes the process of epithelial-mesenchymal transition (EMT) in the human kidney 2 (HK2) cells. The SNP rs9059 is associated with significant kidney allograft pathological changes by promoting EMT progression. Our findings provide insights into the etiology of renal allograft interstitial fibrosis and the MMP9 could be used as a potential treatment target in the future.

Associative role of polymorphism of the gene of &lt;i&gt;MMP-9&lt;/i&gt; (rs11697325) in development of arterial hypertension in patients with the rheumatoid arthritis

Aim. To study a contribution of polymorphism A-8202G (rs11697325) of a gene of matrix metalloproteinase-9 (MMP-9) in development of arterial hypertension (AH) in patients with the rheumatoid arthritis (RA).&#x0D; Materail and methods. 143 patients with RA were examined, among which a group of patients with RA without AH (n=50) and a group of patients with RA in association with AH (n=93) were identified. Healthy volunteers (n=151) were also divided into 2 groups comparable in age, sex and number with the main groups (control group 1 n=54, control group 2 n=97). The work used a range of clinical, laboratory, instrumental methods. A molecular genetic study was also performed. Blood samples were taken from all study participants. DNA isolation was carried out by the standard phenol-chloroform method. Genotyping for the MMP-9 gene was performed by PCR-RFLP analysis (polymerase chain reaction restriction fragment length polymorphism). PCR was carried out with a set of primers to the corresponding regions of the genome. PCR products were analyzed by electrophoresis in 4% polyacrylamide gel followed by staining with ethidium bromide.&#x0D; Results. In the course of a molecular genetic study, a statistically significant predominance of the homozygous AA genotype and the A allele of the MMP-9 (rs11697325) gene polymorphism was observed in the group of patients with RA, both separately and in association with AH, in comparison with the data of control groups. The risk of developing RA estimated by the odds ratio (OR) in carriers of the AA genotype of the MMP-9 gene is 1.8 times higher (95% confidence interval CI 1.1362.950; p=0.02) than in carriers of the GG and GA genotypes; in carriers of the A allele, the risk of developing RA is 1.6 times higher compared to the G allele (95% CI 1.1192.578; p=0.01). The OR risk of developing RA in association with hypertension in carriers of the AA genotype of the MMP-9 gene is 2.8 times higher (95% CI 1.2836.54; p=0.04) compared to GA and GG genotypes, 2.1 times higher in carriers of the A allele (95% CI 1.1134.127; p=0.02) compared to the G allele.&#x0D; Conclusion. Thus, the results of the study indicate that the homozygous AA genotype and the A allele of the MMP-9 (rs11697325) gene polymorphism are the predictors of the development of RA both as a separate nosological unit and in association with AH.

Association of matrix metalloproteinase gene polymorphisms with different biological subtypes of breast cancer

Aim. To investigate the associations of matrix metalloproteinase (MMP) MMP3 (rs679620), MMP8 (rs1940475), and MMP9 (rs17576 and rs3787268) gene polymorphisms with different biological subtypes of breast cancer (BC).&#x0D; Materials and methods. The study sample consisted of 285 patients with BC of various biological subtypes (luminal A and B [n=153], triple negative [n=108], and HER2 positive [HER2+, n=24]) and 746 females in the control group. Genotyping of four polymorphic sites of MMP3 (rs679620), MMP8 (rs1940475), and MMP9 (rs17576 and rs3787268) genes was performed in the study groups.&#x0D; Results. The role of MMP gene polymorphisms in the BC development of various biological subtypes differs. The c.836 AG MMP9 polymorphism (rs17576, the odds ratio is 0.670.71 for the G allele) has a protective effect on the development of luminal A- and B-subtypes of BC; susceptibility to triple-negative BC is associated with the polymorphic site c.1331-163 GA MMP9 (rs3787268, OR 4.51 for genotype AA), and two polymorphisms of the MMP3 (c.133 TC, rs679620, OR 0.460.49 for T allele) and MMP8 (c.259 TC, rs1940475, OR 0.370.48 for T allele) genes are associated with HER2+ BC development. According to the in silico data, the above polymorphisms have pronounced functional effects in organs and tissues that are pathogenetically significant for the disease, including the target organ, the breast.&#x0D; Conclusion. The c.836 AG MMP9 (rs17576) polymorphism is associated with luminal A- and B-subtype of BC; c.1331-163 GA MMP9 (rs3787268) is associated with triple negative BC, and c.133 TC MMP3 (rs679620) and c.259 TC MMP8 (rs1940475) are involved in HER2+ BC development.

Association of the matrix metalloproteinases (MMPs) family gene polymorphisms and the risk of coronavirus disease 2019 (COVID-19); implications of contribution for development of neurological symptoms in the COVID-19 patients.

Seemingly, the Matrix metalloproteinases (MMPs) play a role in the etiopathogenesis of coronavirus disease 2019 (COVID-19). Here in this study, we determined the association of MMP9 rs3918242, MMP3 rs3025058, and MMP2 rs243865 polymorphisms with the risk of COVID-19, especially in those with neurological syndrome (NS). We enrolled 500 patients with COVID-19 and 500 healthy individuals. To genotype the target SNPs, the Real-time allelic discrimination technique was used. To determine serum levels of MMPs, Enzyme-linked immunosorbent assay (ELISA) was exerted. The MMP9 gene rs3918242 and MMP3 gene rs3025058 SNP were significantly associated with increased COVID-19 risk and susceptibility to COVID-19 with NS. The serum level of MMP-9 and MMP-3 was significantly higher in COVID-19 cases compared with the healthy controls. Serum MMP-9 and MMP-3 levels were also higher in COVID-19 subjects with NS in comparison to the healthy controls. The polymorphisms in MMP genes were not associated with serum level of MMPs. MMP9 and MMP3 gene polymorphisms increases the susceptibility to COVID-19 as well as COVID-19 with neurologic syndrome, but they probably have no role in the regulation of serum MMP-9 and MMP-3 levels.

Matrixmetalloproteinase-9 gene polymorphism (rs 17576) increases the risk of depressive symptoms in bipolar disorder.

Plasticity of neural synapses is known to be involved in the complications in bipolar disorder (BD) patients. Matrix metalloproteinases (MMPs) play a role in synaptic plasticity and memory. Even though elevated MMP-9 levels are reported in neuropsychiatric disorders, there is limited data about MMP-9 gene polymorphism in BD. The objectives of the study was to investigate genotype frequency and allele frequency of MMP-9 genetic variant (rs 17576) in BD and its association with disease severity. Eighty BD cases and 80 controls were recruited in the study. MMP-9 genotyping and allele frequency and plasma MMP-9 levels were analyzed in both the groups. Hamilton depression rating scale and Young's Mania Rating Scale (YMRS) were used to evaluate severity of BD. The genotype and minor allele (G allele) frequency were not significant between BD and controls. MMP-9 levels were significantly increased in BD patients with AG (P < 0.001) and GG (P = 0.022) genotypes compared to controls. BD patients with GG genotype (P = 0.038, OR: 3.26 (1.16-9.09), and G (mutant) allele (P = 0.013, OR 2.03(1.18-3.48) confer increased risk of depressive symptoms. MMP-9 was positively correlated with YMRS scale (r = 0.227, P = 0.043) in BD. MMP-9 gene polymorphism (rs 17576) is linked with depressive symptoms in BD.

Matrix Metalloproteinase Gene Polymorphisms Are Associated with Breast Cancer in the Caucasian Women of Russia.

We conducted this study to explore the association between matrix metalloproteinase (MMP) gene polymorphisms and breast cancer (BC) risk in the Caucasian women of Russia. In total, 358 affected (BC) and 746 unaffected (cancer-free) women were included in this case-control retrospective study. From BC-related genes in previous studies, ten single nucleotide polymorphisms (SNPs) in five MMP genes (MMP1, 2, 3, 8, 9) were genotyped. The BC risk was calculated by logistic regression (to evaluate the SNPs’ independent effects) and model-based multifactor dimensionality reduction (MB-MDR) (to identify SNP–SNP interactions) methods. The allelic variants’ distribution of c.836 A > G (rs17576) and c. 1721 C > G (rs2250889) MMP9 was significantly different between BC and cancer-free women: for G minor alleles, these SNPs manifested disorder protective effects (OR 0.82 and OR 0.67–0.71, respectively, pperm ≤ 0.035). Eleven haplotypes of six SNPs MMP9 were involved in BC risk (nine haplotypes) and protective (two haplotypes) effects. All 10 SNPs of the MMP genes examined were associated with BC within the 13 SNP–SNP interaction simulated models, with a pivotal role of the two-locus (rs17577 × rs3918242) MMP9 epistatic interaction (defined as 1.81% BC entropy within more than 60% of the genetic models). Under in silico bioinformatics, BC susceptibility MMP polymorphic loci are located in functionally active genome regions and impact genes expression and splicing “regulators” in the mammary gland. The biological pathways of BC MMP candidate genes are mainly realized due to metalloendopeptidase activity and extracellular matrix organization (structure, disassembly, metabolic process, etc.). In conclusion, our data show that MMP gene polymorphisms are related to BC susceptibility in the Caucasian women of Russia.

The Modifying Effect of Obesity on the Association of Matrix Metalloproteinase Gene Polymorphisms with Breast Cancer Risk.

Objective: We investigated the possible modifying effect of obesity on the association of matrix metalloproteinase (MMP) gene polymorphisms with breast cancer (BC) risk. Methods: A total of 1104 women divided into two groups according to their body mass index (BMI): BMI ≥ 30 (119 BC, and 190 control) and BMI < 30 (239 BC, and 556 control) were genotyped for specially selected (according to their association with BC in the previous study) 10 single-nucleotide polymorphisms (SNP) of MMP1, 2, 3, 8, and 9 genes. Logistic regression association analysis was performed in each studied group of women (with/without obesity). Functional annotation of BC-correlated MMP polymorphic variants was analyzed by in silico bioinformatics. Results: We observed significant differences in the involvement of MMP SNPs in BC in obese and non-obese women. Polymorphic loci MMP9 (c.836 A > G (rs17576) and c. 1721 C > G (rs2250889)) were BC-protective factors in obese women (OR 0.71, allelic model, and OR 0.55, additive model, respectively). Genotypes TT MMP2 (c.-1306 C > T,rs243865) and AA MMP9 (c. 1331-163 G > A,rs3787268) determined BC susceptibility in non-obese women (OR 0.31, and OR 2.36, respectively). We found in silico substantial multidirectional influences on gene expression in adipose tissue BC-related polymorphic loci: BC risk allele A-rs3787268 in non-obese women is associated with low expression NEURL2, PLTP, RP3-337O18.9, SPATA25, and ZSWIM1, whereas BC risk allele A-rs17576 in obese women is associated with high expression in the same genes in visceral and/or subcutaneous adipose. Conclusions: our study indicated that obesity has a significant modifying effect on the association of MMP genes with BC risk in postmenopausal women.

Study on the Relationship between MMP-2, MMP-9 Gene Polymorphisms, and the Risk of Colorectal Cancer.

Objective The aim of the study is to explore the relationship between matrix metalloproteinase 2 (MMP-2) and matrix metalloproteinase 9 (MMP-9) gene polymorphisms and the risk of colorectal cancer. Methods From January 2019 to December 2021, 308 patients with colorectal cancer in our hospital were selected to be included in the colorectal cancer group and 300 normal healthy people were included in the control group. We perform genotyping, compare the genotype frequencies between the colorectal cancer group and the control group, calculate the relationship between MMP-2 and MMP-9 gene polymorphisms and disease risk, and analyze the genotype distribution characteristics of colorectal cancer patients with different pathological stages and lymph node metastasis status. The expression levels of serum MMP-2 and MMP-9 in patients with different genotypes were compared. Results The frequency of CC genotype and C gene at the MMP-2 gene−735 (C/T) locus in the colorectal cancer group was higher than that of the control group, and the frequency of TT genotype and T gene at MMP-9 gene−1562 (C/T) locus was a higher control group (P < 0.05). The comparison of genotype and gene frequency distribution of MMP-2 gene−1306 (C/T), −790 (T/G), and MMP-9 gene R668Q and P574R between the colorectal cancer group and the control group (P > 0.05); MMP-2 gene−735 (C/T) locus CC genotype and MMP-9 gene−1562 (C/T) locus TT genotype are dangerous genotypes for colorectal cancer. OR values were 1.490 (95% CI: 1.085–2.047), 1.519 (95% CI: 1.061–2.174); TNM stage III-IV, the proportion of CC genotype and TT genotype at MMP-9 gene−1562 (C/T) locus in patients with lymph node metastasis is higher than that without lymph node metastasis of TNM stage I-II patients (P < 0.05); MMP-2 gene in colorectal cancer patients. Serum MMP-2 levels in patients with CC genotype at 735 (C/T) locus were higher than those with CT + TT genotype, and serum MMP-9 levels in patients with TT genotype at MMP-9 gene−1562 (C/T) locus were higher CT + CC genotype patients (P < 0.05). Conclusion The CC genotype at −735 (C/T) locus of the MMP-2 gene and the TT genotype at−1562 (C/T) locus of the MMP-9 gene are risk genotypes for the development of colorectal cancer.

The Role of Matrix Metalloproteinase Single-Nucleotide Polymorphisms in the Clinicopathological Properties of Breast Cancer.

(1) Background. Breast cancer is the leading cancer type among women. Despite convenient diagnostics at early stages, there is a need for continuous monitoring to predict more aggressive or recurring breast cancer forms. The evidence suggests that the detection of genetic biomarkers could help in improving disease management and reduce mortality. Matrix metalloproteinases (MMPs) are a large family of enzymes that perform physiologically relevant functions and have the potential properties to be biomarkers for cancer assessment. We aimed to evaluate the contribution and association of single-nucleotide polymorphisms (SNPs) in MMP genes (MMP1, MMP2, MMP3, MMP7, MMP8, MMP9) with clinicopathological breast-cancer features. (2) Methods. In this study, 100 breast cancer patients were genotyped by polymerase chain reaction–restriction fragment length polymorphism methodology (PCR–RFLP). (3) Results. The presence of the MMP7 rs11568818 A allele was associated with lower chances for poorly differentiated breast cancer. The lower possibility for HER2-positive breast cancer was associated with the presence of the MMP9 rs3918242 C allele. (4) Conclusions. These results indicate that MMP7 rs11568818 and MMP9 rs3918242 are potential biomarkers for the anticipation of breast cancer aggressiveness.

Polymorphisms of the matrix metalloproteinase 9 gene are associated with duodenal ulcer in a Caucasian population of Central Russia

ObjectivesThe aim of this study was to analyze functionally significant polymorphisms of matrix metalloproteinases genes (MMP-1, -2, -3, -8, -9) for their association with duodenal ulcer (DU) in the Caucasian population from Central Russia. MethodsThe study sample included 364 DU patients (208 had H. pylori and 156 were uninfected) and 347 controls (H. pylori-negative). Ten polymorphisms of the MMP-1, -2, -3, -8, -9 genes were examined for association with DU by the logistic regression analysis (used the three main genetic models). The polymorphisms of the MMP-9 gene associated with DU and 59 proxy variants (r2 ≥ 0.80) were studied in silico for their functionality. ResultsAllele G of rs17576 and haplotype GG [rs17576-rs3787268] of the MMP-9 gene may increase risk for DU (adjOR = 1.46–2.09, pperm ≤ 0.006 and adjOR = 1.60, pperm = 0.016 respectively). Five SNPs of the MMP-9 gene may increase risk for H. pylori-positive DU: alleles T of rs3918242 (adjOR = 1.95, pperm = 0.007), G of rs17576 (adjOR = 1.68–2.81, pperm ≤ 0.002), and A of rs17577 (adjOR = 1.96, pperm = 0.008), haplotypes GG [rs17576-rs3787268] (adjOR = 1.95, pperm = 0.006) and GGC [rs17576-rs3787268-rs2250889] (adjOR = 1.96, pperm = 0.006). These loci and 59 proxy SNPs may have functionally significant epigenetic effects, amino acid replacements in the MMP9, and correlate with the expression and alternative splicing of 17 and 6 genes respectively. ConclusionsPolymorphisms rs17576 and rs3787268 of the MMP-9 were associated with DU and five MMP-9 gene SNPs were associated with H. pylori-related DU in Caucasians of Central Russia.

Association between matrix metalloproteinase-3 gene polymorphisms and tendon-ligament injuries: evidence from a meta-analysis

BackgroundTendon-ligament injuries (TLIs), including Achilles tendinopathy, cruciate ligament injury, tennis elbow, rotator cuff injury, patellar tendinopathy, and tibial tendinopathy, are common musculoskeletal soft injuries during physical activity. Matrix metalloproteinase-3 (MMP-3) gene polymorphisms have been implicated in the etiology of TLIs in several genetic association studies with inconsistent results. The purpose of this study was to collect and synthesize the current evidences on the association of MMP-3 polymorphisms and TLIs.MethodsThe search was conducted using PubMed, Web of Science, EMBASE, Cochrane Library, CNKI and Wanfang databases, prior to July, 2021. Newcastle Ottawa Scale was used to appraise the study quality. Strengths of association were represented by odds ratios (ORs) and 95% confidence intervals (95% CIs).ResultsThirteen studies with 2871 cases and 4497 controls met the eligibility criteria, and each study was in high quality. The overall analyzes suggested rs3025058 was associated with an increased TLIs risk (5A vs. 6A, OR = 1.20, 95% CI 1.03–1.40, P = 0.020). However, the association was not found for rs679620, rs591058, and rs650108 polymorphisms. Subgroup analysis by injury type suggested that rs679620 polymorphism was associated with a reduced risk to Achilles tendon rupture (AA + AG vs. GG, OR = 0.46, 95% CI 0.25–0.87, P = 0.020), and rs3025058 was associated with an elevated risk to anterior cruciate ligament injury (5A5A + 5A6A vs. 6A6A, OR = 1.46, 95% CI 1.03–2.06, P = 0.030). When stratified by ethnicity, the findings indicated that rs3025058 polymorphism was associated with an increased TLIs risk among Caucasians (5A6A vs. 6A6A, OR = 1.55, 95% CI 1.09–2.42, P = 0.020) and Brazilians (5A5A vs. 5A6A + 6A6A, OR = 2.80, 95% CI 1.44–5.45, P = 0.002).ConclusionFindings of this study suggest that rs679620 polymorphism is associated with a reduced Achilles tendon rupture risk, and rs3025058 polymorphism contributes to an increased TLIs risk in Caucasians and Brazilians. However, rs591058 and rs650108 polymorphisms do not show any association with TLIs.

Correlations of MMP-9 and PPARγ gene polymorphisms with occurrence of preeclampsia.

The aim of this study was to investigate the expressions of matrix metalloproteinase-9 (MMP-9) and peroxisome proliferator-activated receptor gamma (PPARγ) in the placenta of patients with preeclampsia and to elucidate the associations of their polymorphisms with the occurrence of preeclampsia. A total of 200 patients with preeclampsia (Preeclampsia group) and 100 pregnant women with normal delivery (Control group) were enrolled as research subjects. The expressions of MMP-9 and PPARγ in placentae of Preeclampsia group and Control group were measured by Western blotting. Conformation-difference gel electrophoresis was adopted for typing single nucleotide polymorphisms (SNPs) rs101201 and rs23102 in the promoter region of MMP-9 gene and rs201018 and rs102934 in the promoter region of PPARγ gene. Chi-square test was conducted to analyze whether the distribution frequency of MMP-9 and PPARγ genotypes was consistent with the law of genetic equilibrium. The correlations of the alleles and polymorphisms of MMP-9 and PPARγ with the occurrence of preeclampsia were analyzed. In addition, the associations of rs101201 genotype GG of MMP-9 gene and rs201018 genotype TT of PPARγ gene with the clinicopathological features of preeclampsia were analyzed. Compared with Control group, the protein expression level of MMP-9 was significantly down-regulated (p<0.05), while the protein expression level of PPARγ was significantly up-regulated in placental tissues of Preeclampsia group (p<0.05). Based on Hardy-Weinberg equilibrium analysis, the two polymorphisms of both MMP-9 and PPARγ were consistent with the genetic equilibrium distribution (p>0.05). Gene correlation analysis showed that rs101201 polymorphism and its alleles in the promoter region of MMP-9 gene and rs201018 polymorphism and its alleles in the promoter region of PPARγ gene were correlated with the occurrence of preeclampsia (p<0.05). Besides, body mass index (BMI) value, gestational age, systolic blood pressure, and serum creatinine level in preeclampsia patients with the genotype GG of rs101201 in the promoter region of MMP-9 gene were not statistically significantly different from those in Control group (p>0.05). Furthermore, no statistically significant differences were observed in gravidity, parity, gestational age, systolic blood pressure, serum creatinine level, and plasma albumin level between preeclampsia patients with the genotype TT of rs201018 in the promoter region of PPARγ gene and those in Control group (p>0.05). PPARγ and MMP-9 are abnormally expressed in the placenta of patients with preeclampsia. Moreover, rs201018 polymorphism in the promoter region of PPARγ gene and rs101201 polymorphism in the promoter region of MMP-9 gene are correlated with the occurrence of preeclampsia.

Relationship between MMP-9 Gene Polymorphism and Intracranial Aneurysm.

Matrix metalloproteinase-9 (MMP-9) is a gelatinase, which is a member of the MMPs family. We know that MMP-9 is not only an important gelatinase to regulate the extracellular matrix balance, but also one of the most closely related proteases to the pathogenesis of intracranial aneurysm. The purpose of this study is to investigate the relationship between MMP-9 gene polymorphism and intracranial aneurysm. In this paper, 98 patients who were admitted to a hospital from 2018 to 2019 were selected as the experimental group and the control group according to the relevant standards of intracranial aneurysms. The MMP-9 positive and MMP-9 absorbance values between the two groups were compared, so as to determine the concentration of MMP-9 between the two groups. In addition, the gene distribution and gene frequency analysis of the C-1562T promoter region of MMP-9 were carried out. The results showed that in the control group, the gene distribution frequency of CC type was 67% that of CT type was 31% that of TT type was 2%, that of the experimental group was 52%, and that of CT type was 44%. The results showed that there was a correlation between MMP-9 gene polymorphism and intracranial aneurysm.