Результаты поиска

The relationship between matrix metalloproteinases (MMP-3, -8, -9) in serum and peripheral lymphocytes (CD8+ , CD56+ ) in Down syndrome children with gingivitis.

BACKGROUND AND OBJECTIVE: Altered immune response may be a major contributor to periodontal disease in Down syndrome. This study investigated the relationship between peripheral lymphocytes and matrix metalloproteinases (MMPs) in serum in Down syndrome children with gingivitis. MATERIAL AND METHODS: Children with Down syndrome (n = 10) and healthy controls (n = 10) were clinically and radiographically examined during dental treatment under general anaesthesia. Peripheral blood and gingival crevicular fluid were collected from each subject and concentrations were determined: serum MMP-2, -3, -

Marrow matrix metalloproteinases (MMPs) and tissue inhibitors of MMP in acute leukaemia: potential role of MMP-9 as a surrogate marker to monitor leukaemic status in patients with acute myelogenous leukaemia.

BACKGROUND: Nasal septal perforation (NSP) is a multifactorial condition characterised by a full-thickness defect in the nasal septum, with clinical presentation ranging from asymptomatic cases to significant nasal obstruction, crusting, epistaxis, and impaired quality of life. A major challenge in NSP management is the absence of standardised diagnostic and therapeutic protocols, contributing to inconsistent outcomes. This study aimed to develop an international consensus on the assessment, classification, and management of NSP to standardise linical decision-making and improve patient care.

Swift Downregulation of Gelatinases (MMP-2, MMP-9) in Neuropathic Diabetic Foot Ulcers Treated With Total Contact Cast.

OBJECTIVE: The aim of this study is to evaluate how treatment with total contact cast (TCC) affects the balance of proteases in diabetic foo … 018). By week 6, MMP-2 and MMP-9 levels were reduced by 37% and 55%, respectively. Tissue inhibitor matrix metalloproteinase 1 increased by 42% (P = .033) and TIMP-2 by 44% (P = .04) after 6 weeks of therapy with TCC. CONCLUSIONS: This significant and rapid drop of both MMP-2 and MMP-9 strongly suggests a decline of the inflammatory phase and initiation of the proliferatio …

Analysis of the signal transduction pathway of nickel-induced matrix metalloproteinase-2 expression in the human keratinocytes in vitro: preliminary findings.

BACKGROUND: Nickel can induce cellular and nuclear damages responsible for chronic diseases, like allergic contact dermatitis (ACD). We previously showed that matrix metalloproteinase-2 (MMP-2) gene expression was induced by nickel in nontumorigenic human keratinocytes cell line (HaCat). OBJECTIVE: To investigate the signal transduction pathways involved in gelatinolytic activity induced in HaCat under nickel stimulation. METHODS: We analyzed the involvement of protein kinase A (PKA), protein kinase C (PKC), tyrosine kinase (PTK), nuclear factor-kB (NF-kB) and activator protein-1 (AP-1) usin

Interleukin-21--a biomarker of importance in predicting myocardial function following acute infarction?

INTRODUCTION: Following acute myocardial infarction (AMI), the acute inflammatory response contributes to wound healing but also to progressive myocardial injury. Interleukin-21 (IL-21) plays a key role in immunoregulation; whether IL-21 is associated with left ventricular (LV) remodelling after AMI is unknown. METHODS: Plasma IL-21 concentrations were measured in 100 patients (age 58.9 ± 12.0 years, 77% male) admitted with AMI and LV dysfunction, at baseline (mean 46 h) and again at 24 weeks; cardiac magnetic resonance and measurement of B-type natriuretic peptide, monocyte chemoattractant p

Использование терапевтического потенциала TIMP-1 в аутоиммунном воспалении: перспективное понимание.

Ингибиторы тканей матрицы Metalloproteinase 1 (TIMP-1) в последнее время привлекли к себе значительное внимание из-за недавно обнаруженной функции цитокина. Эти выводы повлекли за собой переоценку роли TIMP-1 в качестве ингибитора металопротеиназы. Повышенные уровни TIMP-1 наблюдались в различных аутоиммунных условиях, что повлияло на симптомы заболеваний при множественном склерозе, воспалительном кишечнике и ревматоидном артрите. Кроме того, TIMP-1 влияет на метаболические профили, зависящие от контекста, усиливает гликолитический оборот моноцитов и ассоциируется с ферропотозом у пациентов с

Совпадение в аннотации оригинала
Tissue inhibitors of matrix metalloproteinase 1 (TIMP-1) have recently attracted significant attention owing to their newly discovered cytokine function. These findings prompted a reevaluation of TIMP-1's role as an inhibitor of matrix metalloproteinase. Elevated TIMP-1 levels have been observed in various autoimmune conditions, influencing disease outcomes …

The role of sinusoidal endothelial cells and TIMP1 in the regulation of fibrosis in a novel human liver 3D NASH model.

BACKGROUND: The prevalence of NAFLD is rapidly increasing. NAFLD can progress to NASH, fibrosis, cirrhosis, and HCC, which will soon become the main causes of liver transplantation. To date, no effective drug for NASH has been approved by the Food and Drug Administration. This is partly due to the lack of reliable human in vitro models. Here, we present a novel human liver spheroid model that can be used to study the mechanisms underlying liver fibrosis formation and degradation. METHODS AND RESULTS: Such spheroids, which contain hepatocytes, stellate cells, KC, and LSECs, spontaneously devel

Matrix metalloproteinases in skin.

Matrix metalloproteinases (MMPs) are a family of zinc-dependent endopeptidases collectively capable of degrading essentially all extracellular matrix components. These enzymes can be produced by several different types of cells in skin such as fibroblasts, keratinocytes, macrophages, endothelial cells, mast cells, and eosinophils and their activity can be specifically inhibited by TIMPs (tissue inhibitors of metalloproteinases), which bind to active MMPs with 1:1 stoichiometry. In general, MMPs are not constitutively expressed in skin but are induced temporarily in response to exogenous signal

Pharmacological effects of indole alkaloids from Alstonia scholaris (L.) R. Br. on pulmonary fibrosis in vivo.

ETHNOPHARMACOLOGICAL RELEVANCE: Alstonia scholaris (L.) R. Br. (Apocynaceae) is a Dai folk medicine for the treatment of lung diseases in China. AIM OF THE STUDY: The present study investigated the anti-pulmonary fibrosis effects of total alkaloids (TA) and the potential active ingredients and its possible mechanism. MATERIALS AND METHODS: After intratracheal instillation of bleomycin (BLM, 5 mg/kg), mice were divided into ten groups, and orally treated with the corresponding samples once daily for 28 days. The effect of indole alkaloids was determined through analysis of cytokines, as well

Prior vedolizumab exposure and fibroblast-derived MMP13 are associated with ustekinumab nonresponse in ulcerative colitis.

BACKGROUND: As therapeutic options for ulcerative colitis increase, optimizing the sequencing of advanced therapies has become an important … hways in nonresponders, and quantitative polymerase chain reaction confirmed significantly elevated matrix metalloproteinase 13 expression. In vitro stimulation assays demonstrated that interleukin-1β robustly induced matrix metalloproteinase 13 expression in intestinal fibroblasts. CONCLUSIONS: Prior vedolizumab exposure was associated with lower ustekinumab effectiveness …

Ethnopharmacological and Antiaging Evaluation of Salvia cadmica: Modulation of MMP1/MMP3 and Collagen in Oxidative Stress-Induced Senescence.

Salvia cadmica, an Anatolian endemic species traditionally used for wound healing and inflammation, has been scarcely investigated for its anti-aging potential. In this study, the aqueous-ethanol extract of S. cadmica was evaluated for its antioxidant, cytoprotective, and anti-senescence effects using in vitro and in silico approaches. LC-ESI-MS/MS analysis identified rosmarinic acid (3447 µg/g), luteolin 7-glucoside (767 µg/g), and luteolin (586 µg/g) as major constituents. The extract exhibited strong antioxidant capacity, particularly in the phosphomolybdenum assay (713.51 mg TEs/g), and sh

Evaluation and Comparison of Treatment with Polymerised Collagen or Pirfenidone as Stand-Alone Therapy on the Production of Profibrotic Factors in Tracheal Stenosis and Tracheal Anastomosis Scarring After Resection.

Polymerised type I collagen (polymerised collagen) and pirfenidone (PFD) reduce fibrosis. However, their use as pharmacological monotherapy for tracheal stenosis (TS) has not been evaluated. This study aimed to evaluate the effects of polymerised collagen or PFD, used either as monotherapy for TS, or in combination with tracheal resection (TRE) on the development of restenosis (RTS), apoptotic body (AB) formation, production of profibrotic proteins, ITGβ1 expression and metalloproteinase (MMP) expression in a rat model of TS. Eighty Wistar rats underwent TS. Forty received monotherapy (treatme

Effect of hydroxychloroquine on trophoblastic invasion in relation to autophagy mediated by ET-1 and ERK.

INTRODUCTION: Hydroxychloroquine (HCQ), which has multiple effects, including autophagy inhibition, is used to prevent obstetric complications. However, the exact mechanism through which HCQ affects placentation remains unclear. We investigated the in vitro effects of HCQ on trophoblast invasion with respect to autophagy. METHODS: HTR-8/SVneo cells were used to perform Matrigel invasion assays. They were treated with rapamycin to induce autophagy with or without HCQ treatment. We examined autophagy-related proteins (p62 and LC3-II) through western blotting and confocal microscopy, and measure

Potential Biomarkers in Diagnosis of Renal Acanthamoebiasis.

Recent studies indicate that Acanthamoeba spp. may play a significant role in kidney dysfunction. The aim of the study was to examine the levels of kidney injury molecule 1 (KIM-1), neutrophil gelatinase-associated lipocalin (NGAL), and monocyte chemotactic protein 1 (MCP-1), as well as an activity of matrix metalloproteinases 2 and 9 (MMP-2 and MMP-9, respectively) in the kidneys of immunocompetent and immunosuppressed mice infected with Acanthamoeba spp. The levels of KIM-1, NGAL, and MCP-1 were analyzed by enzyme-linked immunosorbent assay (ELISA), and the activity of MMPs was determined by

Responses of black and white skin to solar-simulating radiation: differences in DNA photodamage, infiltrating neutrophils, proteolytic enzymes induced, keratinocyte activation, and IL-10 expression.

Black skin is more resistant to the deleterious effects of ultraviolet radiation than white skin. A higher melanin content and a different melanosomal dispersion pattern in the epidermis are thought to be responsible for this. Our purpose was to compare skin responses in black and white skin following exposure to solar-simulating radiation (SSR) to further investigate the photoprotective properties of black skin. Six volunteers of skin phototype I-III (white) were exposed to (doses measured directly with a Waldmann UV detector device) 12,000-18,000 mJ per cm2 (2 MED) of SSR and compared with s

Distinct populations of stromal cells express collagenase-3 (MMP-13) and collagenase-1 (MMP-1) in chronic ulcers but not in normally healing wounds.

Proteolysis is an intrinsic component of cutaneous wound repair and several matrix metalloproteinases have been shown to participate in various stages of this process. Therefore, we investigated the expression of a novel metalloproteinase, collagenase-3 (MMP-13), in normally healing cutaneous wounds and chronic venous ulcers. MMP-13 was expressed abundantly by fibroblasts deep in the chronic ulcer bed but was not detected in epidermis and all the acute wounds. The spatial expression of MMP-13 differed from that of collagenase-1 (MMP-1), which was prominently expressed by migrating keratinocyte

Effects of enzymatic degradation after loading in temporomandibular joint.

Synovial fluid of the joint decreases friction between the cartilage surfaces and reduces cartilage wear during articulation. Characteristic changes of synovial fluid have been shown in patients with osteoarthritis (OA) in the temporomandibular joint (TMJ). OA is generally considered to be induced by excessive mechanical stress. However, whether the changes in synovial fluid precede the mechanical overloading or vice versa remains unclear. In the present study, our purpose was to examine if the breakdown of joint lubrication affects the frictional properties of mandibular condylar cartilage an

Reflux induces DNA strand breaks and expression changes of MMP1+9+14 in a human miniorgan culture model.

Gastroesophageal reflux disease has been implicated in the pathogenesis of adenocarcinoma of the oesophagus. The same applies to laryngopharyngeal reflux (LPR) and squamous cell cancer of the head and neck, but so far, this link has not been proven. The impact of low pH and bile acids has not been studied extensively in cells other than oesophageal cancer cell lines and tissue. The aims of this study were to investigate the pathogenic potential of reflux and its single components on the mucosa of the upper respiratory tract. We measured DNA stability in human miniorgan cultures (MOCs) and prim

Involvement of furin-like proprotein convertases in the arterial response to injury.

BACKGROUND: Furin-like proprotein convertases (PCs) are proteolytic activators of proproteins, like membrane type 1-matrix metalloproteinase (MT1-MMP) and transforming growth factor beta (TGF-beta), that are described in the arterial response to injury. However, the involvement of furin-like PCs in the arterial response to injury has not been studied yet. We studied furin, MT1-MMP, MMP levels and TGF-beta signaling after arterial injury. We also investigated the effect of an inhibitor of furin-like PCs, alpha1-antitrypsin Portland (alpha1-PDX), on arterial injury following balloon dilation. M

Regulative effect of Taohong Siwu decoction on extracellular matrix of endometrium in drug-induced abortion.

Spondias mombin is used in the folk medicine for the treatment of diarrhea and dysentery, indicating that extracts obtained from this species may present pharmacological activities against pathogenic microorganisms. The purpose of this work was to investigate the chemical composition and evaluate the antimicrobial activity of extracts obtained from the leaves (aqueous) and bark (hydroethanolic) of S. mombin both as single treatments and in combination with conventional drugs. Following a qualitative chemical prospection, the extracts were analyzed by HPLC-DAD. The antimicrobial activities were