نتایج جستجو برای: lox isolation
تعداد نتایج: 133969 فیلتر نتایج به سال:
Human 5-lipoxygenase (5-LOX) oxidizes arachidonic acid to 5S-hydroperoxy-6 E,8 Z,11 Z,14 Z-eicosatetraenoic acid (5-HpETE) and leukotriene (LT) A4. In neutrophils, LTA4 is further converted to the potent chemoattractant LTB4. These cells also contain the heme enzyme myeloperoxidase (MPO), which produces several potent oxidants such as hypochlorous acid (HOCl), which are involved in pathogen def...
Recently, we reported the induction of reticulocyte type 15-lipoxygenase (15-Lox-1) in a human colorectal carcinoma cell line that had been stimulated by butyrate to undergo apoptosis and cell differentiation (H. Kamitani et al., J. Biol. Chem., 273: 21569–21577, 1998). To determine if 15-Lox-1 is expressed in human colorectal cancer tissue, 21 matched pairs of colorectal tumor and adjacent nor...
Lectin-like oxidized low-density lipoprotein receptor-1 (LOX-1) regulates growth of a variety of cells and is important in inflammation, oxidative stress, and tissue remodeling. Recent studies show that LOX-1 deletion limits cardiac remodeling after sustained hypertension. We posited that LOX-1 may affect cardiac fibroblast growth and collagen secretion. To examine this postulate, we studied gr...
The constitutive expression or overactivation of cyclooxygenase (COX) and lipoxygenase (LOX) enzymes results in aberrant metabolism arachidonic acid poor prognosis melanoma. Our aim is to compare the vitro effects selective COX-1 (acetylsalicylic acid), COX-2 (meloxicam), 5-LOX (MK-886 AA-861), 12-LOX (baicalein) 15-LOX (PD-146176) inhibition terms proliferation (SRB assay), mitochondrial viabi...
Lysyl oxidase (LOX) serves an important role in remodeling the extracellular matrix and angiogenesis in various types of cancer; however, whether LOX is involved in the pathogenesis of rheumatoid arthritis remains unknown. In order to investigate this in the present study, β‑aminopropionitrile, an inhibitor of LOX, was injected intraperitoneally into rats with type II collagen‑induced arthritis...
The LOX-1 (lectin-like oxidized low-density lipoprotein receptor-1) scavenger receptor regulates vascular responses to oxidized-low-density-lipoprotein particles implicated in atherosclerotic plaque formation. LOX-1 is closely related to C-type lectins, but the mechanism of ligand recognition is not known. Here we show that human LOX-1 recognizes a key cellular phospholipid, PS (phosphatidylser...
PURPOSE Lysyl oxidase (LOX) cross-links the side chain of collagen and elastin and thereby contributes to extracellular matrix (ECM) integrity. ECM remodeling is seen in various ocular diseases. Until now, there have been no reports on the LOX enzyme's activity in ocular tissues. The purpose of this study was to estimate LOX activity and expression in human donor ocular tissues and to measure t...
To explore whether the proinflammatory products of the 5-lipoxygenase (5-LOX) pathway are involved in microglia-mediated toxicity toward neuronal cells, we evaluated the effects of 5-LOX inhibitors using an in vitro assay system where human neuronal SH-SY5Y cells are exposed to toxic secretions from THP-1 monocytic cells or human microglia. The specific 5-LOX inhibitors, REV 5901, zileuton, and...
RATIONALE Mutations in several genes have been identified that are responsible for 25% of families with familial thoracic aortic aneurysms and dissections. However, the causative gene remains unknown in 75% of families. OBJECTIVES To identify the causative mutation in families with autosomal dominant inheritance of thoracic aortic aneurysms and dissections. METHODS AND RESULTS Exome sequenc...
Continuing our search to find more potent and selective 5-LOX inhibitors, we present now the enzymatic evaluation of seventeen isoflavones (IR) and nine isoflavans (HIR), and their in vitro and in cellulo potency against human leukocyte 5-LOX. Of the 26 compounds tested, 10 isoflavones and 9 isoflavans possessed micromolar potency, but only three were selective against 5-LOX (IR-2, HIR-303, and...
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