gelatinase/cárie dentária

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MMP-9 in Dentinal Fluid Correlates with Caries Lesion Depth.

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The analysis of molecular cues in dentinal fluid from an excavated cavity could improve diagnostics in the context of minimally invasive caries treatment. In the current clinical trial we assessed whether the dentinal fluid levels of MMP-9 (matrix metalloproteinase-9; neutrophil gelatinase) would

The influence of root canal sealer on extended intracanal survival of Enterococcus faecalis with and without gelatinase production ability in obturated root canals.

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Enterococcus faecalis can survive for extended periods in obturated root canals. In this study, the hypotheses tested were that long-term survival of E. faecalis is dependent on (1) the type of endodontic sealer and (2) the capacity for microbial gelatinase activity, a potential "virulence" trait

Role and regulation of expression of 92-kDa type-IV collagenase (MMP-9) in 2 invasive squamous-cell-carcinoma cell lines of the oral cavity.

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The present study was undertaken to determine the role of the metalloproteinase MMP-9 in the invasive phenotype of squamous-cell carcinoma of the oral cavity and the regulation of its expression. Zymographic analysis of conditioned medium from 2 highly invasive squamous-cell-carcinoma cell lines

Microbial invasion and histological chorioamnionitis upregulate neutrophil-gelatinase associated lipocalin in preterm prelabor rupture of membranes.

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Our recent exploratory proteomic study suggested increased levels of neutrophil-gelatinase associated lipocalin (P80188, NGAL_HUMAN) due to microbial invasion of the amniotic cavity (MIAC) and histological chorioamnionitis (HCA) in women with preterm prelabor rupture of the membranes. In this study,

Neutrophil emigration in the lungs, peritoneum, and skin does not require gelatinase B.

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Polymorphonuclear leukocytes (PMN) release gelatinase B in response to variable stimuli. Gelatinase B degrades basement membrane components in vitro, and inhibition of matrix metalloproteinase activity blunts PMN migration through a prototype basement membrane (Matrigel) and amnionic membranes.

Subclinical concentrations of chlorhexidine inhibit gelatinase activity of carious dentine in vitro.

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BACKGROUND There is evidence that dentine matrix gelatinases are involved in the destruction of carious dentine after demineralization by bacterial acids. It has also been observed that chlorhexidine, in very low concentrations, inhibits the activity of these enzymes in mammalian cells. The goal of

Head and neck radiotherapy does not increase gelatinase (metalloproteinase-2 and -9) expression or activity in teeth irradiated in vivo.

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OBJECTIVE Recent studies suggested that head and neck radiotherapy increases active forms of matrix metalloproteinases (MMPs) in the dentin-enamel junction (DEJ), leading to enamel delamination and radiation-related caries. This study aimed to assess the expression and activity of the gelatinases

Matrix metalloproteinases expressed in squamous cell carcinoma of the oral cavity: correlation with clinicopathologic features and neo-adjuvant chemotherapy response.

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Secretion of gelatinases A (MMP-2) and B (MMP-9) from 21 tumoral explants of squamous cell carcinoma (SCC) and five samples of normal mucosa of the oral cavity is demonstrated here. The explants were cultured into fetal bovine serum- and phenol red-deprived medium for 48 hours. The gelatinases

Gelatinase B/MMP-9 as an inflammatory marker enzyme in mouse zymosan peritonitis: comparison of phase-specific and cell-specific production by mast cells, macrophages and neutrophils.

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Neutrophil infiltration during zymosan peritonitis depends on matrix metalloproteinase-9 (MMP-9) activity as it is impaired both in MMP-9(-/-) and gelatinase inhibitor-treated animals. The producer cells of MMP-9 and their relative contribution are not known. The aim of this study was to identify

Uterine cavity matrix metalloproteinases and cytokines in patients with leiomyoma, adenomyosis or endometrial polyp.

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OBJECTIVE To determine whether leiomyoma, adenomyosis and endometrial polyps are associated with changes in uterine cavity matrix metalloproteinases (MMP-2 and MMP-9) and cytokines. METHODS Uterine cavity irrigation was performed in women with leiomyoma, adenomyosis and endometrial polyps, and in

Detection of endometrial cancer by determination of matrix metalloproteinases in the uterine cavity.

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OBJECTIVE The known overexpression of matrix metalloproteinases (MMPs) by various tumors prompted a study to determine whether endometrial cancer could be detected by measuring MMPs in uterine cavity washings. METHODS The study populations comprised 95 women being treated for endometrial cancer and

An in vivo model for screening peptidomimetic inhibitors of gelatinase A.

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Gelatinase A, a matrix metalloproteinase, is frequently associated with human solid tumors, and its secretion and activation in the tumor milieu is considered important in the process of angiogenesis, invasion, and metastasis. Consequently, metalloproteinase inhibitors may be of value in the therapy

Matrix metalloproteinases (MMP-2 and MMP-9) of the oral cavity: cellular origin and relationship to periodontal status.

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Proteolytic enzymes released by the host cells are associated with the tissue destruction in periodontal diseases. Matrix metalloproteinases (MMPs) have the primary role in this process, since, in concert, they can degrade most of the extracellular matrix components. In the present study, we

Successful implantation after reducing matrix metalloproteinase activity in the uterine cavity.

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BACKGROUND Recently, the concept of recurrent implantation failure (RIF) in assisted reproductive technology has been enlarged. Chronic uterine inflammation is a known cause of implantation failure and is associated with high matrix metalloproteinase (MMP) activity in uterine cavity flushing. MMP

Matrix metalloproteinases are obligatory for the migration of preosteoclasts to the developing marrow cavity of primitive long bones.

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A key event in bone resorption is the recruitment of osteoclasts to future resorption sites. We follow here the migration of preosteoclasts from the periosteum to the developing marrow cavity of fetal mouse metatarsals in culture, and investigate the role of proteinases and demineralization in this

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