Showing 4 results for Matrix Metalloproteinase
Nasim Dana , Shiva Safavi , Nafiseh Nili , Badrodin Ebrahim Seyed Tabatabaei, Shaghayegh Haghjooy Javanmard ,
Volume 72, Issue 6 (9-2014)
Abstract
Background: The occlusion of the artery and vein grafts are currently a major problem in coronary bypass surgery. Degradation of collagen and elastin, the most abundant extracellular matrix proteins in the vessel wall by matrix metalloproteinase (MMPs), leads to a rearrangement of the extracellular matrix and vascular wall structure. The present study aimed to compare the histological and biochemical characteristics of arteries and veins which could have a role in the failure of the graft.
Methods: This study was a cross-sectional study of 80 patients conducted at Heart Hospitals in Isfahan, Iran, between July 2012 and November 2013. Samples were collected from the remains of vessels used in bypass surgery of 11 male nondiabetic patients. The histologic, collagen elastin ratio and MMPs levels of the vessels were investigated. MMPs were determined using the Gelatin Zymography method. For elastin and collagen content measurement, the sample was digested by cyanogen bromide and hydrochloric acid and then hydroxyproline was measured with a spectrophotometer.
Results: The amount of active and inactive MMP-2 and MMP-9 of the left internal mammary artery (Lima) was similar to aorta, but the amount of MMP-2 and MMP-9 in the radial artery and saphenous vein were significantly higher than aorta. Elastin to collagen ratio in Lima (1.92±1.15) was similar to the aorta (3.4±1.66), but this proportion in saphenous vein (1.07±0.47) and radial artery (1.14±0.39) was significantly lower in the aorta (P≤0.05). Most patients had atherosclerotic plaque in radial while there was atherosclerotic plaque in Lima of only one case.
Conclusion: The presence of atherosclerotic plaques in radial and thickening of the intimal layer of the saphenous vein in the majority of patients and decrease of collagen to elastin ratio and the high level of matrix metalloproteinase enzymes in the radial and saphenous vein can induce early pathological conditions, and remodeling of the vessels involved. So the results of this study confirm that Left Internal Mammary Artery (LIMA) is the most suitable candidate for bypass surgery.
Abbasali Niyazi , Shima Javanbakht , Nezar Ali Muolaie , Mohamad Kazem Momeni , Mosayeb Shahriyar , Mehdi Nourallahzadeh,
Volume 77, Issue 1 (4-2019)
Abstract
Background: Matrix metalloproteases (MMPs) are multi-chain proteins that regulated by tissue inhibitor of metalloproteinases (TIMP) and several other mechanisms. This Includes transcription regulation and protein form secretion. The roles of MMPs in wound healing and tissue repair. In tuberculosis (TB), the activity of MMPs is increased and TIMP inhibitors decrease activity. Therefore, in tuberculosis, MMPs cause excessive damage to the lung tissue and cavity formation.
Methods: In a case-control study, plasma samples of healthy controls, symptomatic respiratory tract controls and tuberculosis patients were evaluated by available sampling in Ali Ibn Abitaleb and Bouali Hospitals, Zahedan, Iran, from Apri1 2015 to April 2018. Patients were divided into two groups: tuberculosis and control group and the level of MMPs were measured by the enzyme-linked immunosorbent assay (ELISA) method in plasma samples of the two groups. For MMP-8, which was important in the diagnosis of tuberculosis, a cutoff point was obtained.
Results: 384 people including 123 healthy controls. 107 non-tuberculosis, and 154 tuberculosis patients were examined; 230 patients in the control group and 154 patients in the tuberculosis group. Levels of MMPs in tuberculosis and symptomatic respiratory group were higher than healthy group. The mean of MMP-8 was significantly different between two groups (P<0.001). In this study, sensitivity, specificity, positive and negative predictive value of plasma MMP-8 in detection of TB in non-TB patients in MMP-8 cutoff point=6650 pg/ml were 65.4%, 78.2%, 50%, and 93% respectively outcome. Significantly, the rate of pulmonary cavity was significantly higher in the TB group; Higher cavity, higher concentration of plasma MMPs.
Conclusion: In this study, first comprehensive analysis of MMPs was performed. Two collagenases, MMP-1 and MMP-8, were active in tuberculosis, but MMP-8 was specifically higher in tuberculosis than in both symptomatic and healthy controls. Level of MMP-1, 3, 8, 9 was higher in men than in women. The analysis of genders separately showed MMP-8 was increased in tuberculosis group in comparison with control group and MMP-1 group in both TB and symptomatic respiratory tract increased.
Solmaz Khalighfard , Shiva Irani , Ramesh Omranipour , Ali Mohammad Alizadeh ,
Volume 77, Issue 6 (9-2019)
Abstract
Background: Metalloproteinase enzymes can lead to the digestion of the extracellular matrix and its compounds and ultimately facilitate the metastasis of cancer cells to other tissues. This study aimed to evaluate the activity of matrix metalloproteinases (MMPs) 1 and 13 in the tissue and plasma samples of the patients with breast cancer and their relationship with clinical features of the disease.
Methods: In this experimental study, twenty-five patients with the diagnosis of non-metastatic luminal A breast cancer in the stage 2 or 3 from the patients referred to the Cancer Institute of Iran, as well as eight healthy subjects which was performed in the Cancer Research Center of Tehran University of Medical Sciences from March 2017 to September 2017, were entered into the study. After obtaining written consent, a few biopsies of breast tumor tissues and 10 cc of the whole blood were collected from all the subjects. Then, the collagen zymography assay was used to evaluate the activity of MMPs 1 and 13.
Results: The results of the present study showed that the activity of MMPs 1 and 13 in the plasma samples was significantly increased in comparison with the healthy group (respectively P=0.0055 and P=0.0263). Unlike the MMP-13, the activity level of the MMP-1 in the tumor and plasma samples was significantly different (P=0.0227). Plasma activity levels of MMP-1 (P=0.0037) and MMP-13 (P=0.0311) were also significantly different in stages 2 and 3 of the disease. Unlike the MMP-13, the activity level of MMP-1 was significantly different in lymph nodes between the tissue and plasma samples (respectively P=0.03 and P=0.015). Moreover, there was no significant difference in the activity level of MMPs 1 and 13 with menopausal and non-menopausal status between the tissue and plasma samples.
Conclusion: The results of the present study showed that plasma concentrations of the MMPs 1 and 13 in comparison with their tissue concentrations could be an appropriate diagnostic tool for breast cancer patients.
Rezvan Asgari, Mitra Bakhtiari,
Volume 78, Issue 6 (9-2020)
Abstract
Infertility as a vital process in human reproduction involves many couples worldwide. Although many genetic causes of infertility are known, the genetic basis of infertility in men is largely unknown. Therefore, the identification of genetic biomarkers in this field is important and genetic polymorphisms in key genes of the spermatogenesis pathway can be valuable biomarkers in this field. Gene's polymorphisms with specific genetic background and/or environmental factors can lead to the dysfunction in testicular function or the process of sperm production. Matrix metalloproteinases (MMPs) are a family of zinc-dependent enzymes that play an important role in extracellular matrix remodeling by activating gelatinases, collagenases, and proteolytic enzymes. These enzymes are essential for the regulation of cellular connections in the testis. Extracellular matrix degradation and connective tissue remodeling are important structural changes in germ cell migration that are controlled through important genes, including MMPs and their biological inhibitors. Given the important role of MMPs in the structural and functional characteristics of reproductive organs, genetic polymorphisms in MMP genes are significant because they can influence gene transcription and the biological function of proteins. Studies have shown that matrix metalloproteinases are involved in the degradation of extracellular matrix and play an important role in the process of spermatogenesis and sperm quality. This review article aims to evaluate the role of two common, functional MMP2 G1575A and MMP9 C-1562T polymorphisms in male infertility. The findings indicate that polymorphisms of MMP2 G1575A and MMP9 C-1562T can affect gene transcription, protein level, and enzymatic activity, and also, these variants can be as one of the genetic causes in male infertility among different ethnic populations. Therefore, identifying these molecular changes can help to adopt appropriates therapeutic and diagnostic measures as well as guide therapeutic approaches to intelligent therapies. To achieve a definitive conclusion and confirm the association of these polymorphisms with male infertility, evaluations of gene-gene and gene-environment interactions can be important for larger sample sizes of different ethnicities.
