Хуудас 1 -аас 100 үр дүн
The proteolytic activation of pro-matrix metalloproteinase (MMP)-9 by conversion of the 92-kDa precursor into an 82-kDa active form has been observed in chronic wounds, tumor metastasis, and many inflammation-associated diseases, yet the mechanistic pathway to control this process has not been
Fibronectin (Fn) is a high molecular-weight glycoprotein that can influence many aspects of monocyte function. The purpose of this study was to determine whether Fn could stimulate monocyte tumor necrosis factor (TNF) secretion. Monocytes were isolated from the peripheral blood of healthy volunteers
The transcription factor NF-kappaB is constitutively activated in many human cancers and induces the expression of multiple genes, including those of anti-apoptotic proteins. This study investigated the mechanism by which human gastric cancer cells (MKN45) are resistant to apoptosis induced by tumor
A population of latent (cryptic) receptors for tumor necrosis factor-alpha (TNF) has been characterized in the rat liver plasma membrane (PM). 125I-TNF bound to high (Kd = 1.51 +/- 0.35 nM) and low (Kd = 13.58 +/- 1.45 nM) affinity receptors in PM. Solubilization of PM with 1% Triton X-100 prior to
A method of the operative treatment of the II stage of aseptic necrosis of the femur by subchondral autoplasty (with bone chips with crystal chymotrypsin) is described. In 18 of 22 patients operated upon good results were noted, in 3 patients results were satisfactory during 2-5 years.
BACKGROUND
Tumour necrosis factor (TNF-alpha) is a candidate factor for involvement in inflammation-mediated gastric mucosal injury. However, the effect of this cytokine on gastric epithelial cells has been poorly investigated. In the present study, we examined whether gastric epithelial cells are
A new experimental model has been found whereby acute hemorrhagic pancreatic necrosis with fat necrosis is induced in 100% of young female mice fed a choline-deficient diet supplemented with 0.5% DL-ethioine. The onset of the pancreatic necrosis has been shown to follow accumulation, and subsequent
There is evidence in the literature that serine (Ser) proteases, like caspases, are activated during apoptosis. Little is known, however, about individual Ser proteases and the mechanism of their activation. In the present study, we employed a new type of cell permeant reagent to detect activation
Recombinant human tumor necrosis factor (TNF) was digested with endopeptidases under mild conditions. Incubation of the TNF (155-amino-acid TNF) with trypsin, Staphylococcus aureus V-8 protease or chymotrypsin initially released small peptides derived from the amino (N)-terminal region of TNF, but
Intercellular fluids of compatible race-cultivar interactions of Cladosporium fulvum and tomato contain specific elicitors of necrosis. These elicitors which are of fungal origin induce chlorosis and necrosis in resistant but not in susceptible plants. With the tomato cultivar Sonatine (carrying
We investigated the effect of various protease inhibitors on several tumor necrosis factor (TNF)-mediated cellular responses. Treatment of a human myelogenous leukemia cell line, ML-1a, with TNF in the presence of cycloheximide triggers endonucleolytic activity and apoptotic cell death within 90
Tumor necrosis factor (TNF) is cytocidal for human and murine cells when protein synthesis is inhibited by cycloheximide, but some protease inhibitors completely protect these cells from TNF cytotoxicity. Inhibitors of chymotrypsin-like proteases are active at lower concentrations than inhibitors of
Newcastle disease virus (NDV) has been used to induce regression of tumors in human cancer patients. We recently demonstrated that human malignant melanoma cells resistant to the lytic effects of tumor necrosis factor-alpha (TNF-alpha) become susceptible after treatment with NDV. We examined the
BACKGROUND
Chymotrypsin (CT) and CT-like enzymes contribute to the dynamics of metabolism by their participation in digestion, peptide hormone generation and catabolism, fertilization of ova and inhibition of thrombin-induced platelet aggregation, among other processes. The frequency of pancreatitis