piperidines has been researched along with Escherichia-coli-Infections* in 10 studies
1 review(s) available for piperidines and Escherichia-coli-Infections
1 trial(s) available for piperidines and Escherichia-coli-Infections
9 other study(ies) available for piperidines and Escherichia-coli-Infections
Article | Year |
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Combined Effects of M1 Muscarinic Acetylcholine Receptor Agonist TBPB and α7n-Acetylcholine Receptor Activator GTS-21 on Mouse Mortality and Blood Concentration of Proinflammatory Cytokines in Sepsis.
Experiments on random-bred albino mice showed that M1 muscarinic acetylcholine receptor agonist (TBPB) and α7n-acetylcholine receptor agonist (GTS-21) significantly reduced mortality of mice with experimental sepsis (intraperitoneally administration of E. coli) in 4 and 24 h after modeling by reducing blood concentration of proinflammatory cytokines TNF-α, IL-1β, and IL-6. Combined treatment with TBPB and GTS-21 determined their additive effect. Topics: alpha7 Nicotinic Acetylcholine Receptor; Animals; Benzimidazoles; Benzylidene Compounds; Drug Therapy, Combination; Escherichia coli; Escherichia coli Infections; Female; Gene Expression Regulation; Interleukin-1beta; Interleukin-6; Male; Mice; Muscarinic Agonists; Nicotinic Agonists; Piperidines; Pyridines; Receptor, Muscarinic M1; Sepsis; Survival Analysis; Treatment Outcome; Tumor Necrosis Factor-alpha | 2017 |
Piperine metabolically regulates peritoneal resident macrophages to potentiate their functions against bacterial infection.
Pepper, a daily-used seasoning for promoting appetite, is widely used in folk medicine for treating gastrointestinal diseases. Piperine is the major alkaloid in pepper and possesses a wide range of pharmacological activities. However, the mechanism for linking metabolic and medicinal activities of piperine remains unknown. Here we report that piperine robustly boosts mTORC1 activity by recruiting more system L1 amino acid transporter (SLC7A5/SLC3A2) to the cell membrane, thus promoting amino acid metabolism. Piperine-induced increase of mTORC1 activity in resident peritoneal macrophages (pMΦs) is correlated with enhanced production of IL-6 and TNF-α upon LPS stimulation. Such an enhancement of cytokine production could be abrogated by inhibitors of the mTOR signaling pathway, indicating mTOR's action in this process. Moreover, piperine treatment protected resident pMΦs from bacterium-induced apoptosis and disappearance, and increased their bacterial phagocytic ability. Consequently, piperine administration conferred mice resistance against bacterial infection and even sepsis. Our data highlight that piperine has the capacity to metabolically reprogram peritoneal resident macrophages to fortify their innate functions against bacterial infection. Topics: Alkaloids; Amino Acids; Animals; Anti-Bacterial Agents; Apoptosis; Benzodioxoles; Disease Models, Animal; Escherichia coli; Escherichia coli Infections; Female; Fusion Regulatory Protein 1, Heavy Chain; HeLa Cells; Humans; Immunity, Innate; Inflammation Mediators; Interleukin-6; Large Neutral Amino Acid-Transporter 1; Lipopolysaccharides; Macrophage Activation; Macrophages, Peritoneal; Male; Mechanistic Target of Rapamycin Complex 1; Mice; Mice, Inbred C57BL; Multiprotein Complexes; Phagocytosis; Piperidines; Polyunsaturated Alkamides; RAW 264.7 Cells; RNA Interference; Signal Transduction; Time Factors; TOR Serine-Threonine Kinases; Transfection; Tumor Necrosis Factor-alpha | 2015 |
An A2A adenosine receptor agonist, ATL313, reduces inflammation and improves survival in murine sepsis models.
The pathophysiology of sepsis is due in part to early systemic inflammation. Here we describe molecular and cellular responses, as well as survival, in A 2A adenosine receptor (AR) agonist treated and untreated animals during experimental sepsis.. Sepsis was induced in mice by intraperitoneal inoculation of live bacteria (Escherichia coli or Staphylococcus aureus) or lipopolysaccharide (LPS). Mice inoculated with live bacteria were treated with an A 2A AR agonist (ATL313) or phosphate buffered saline (PBS), with or without the addition of a dose of ceftriaxone. LPS inoculated mice were treated with ATL313 or PBS. Serum cytokines and chemokines were measured sequentially at 1, 2, 4, 8, and 24 hours after LPS was administered. In survival studies, mice were followed until death or for 7 days.. There was a significant survival benefit in mice infected with live E. coli (100% vs. 20%, p = 0.013) or S. aureus (60% vs. 20%, p = 0.02) when treated with ATL313 in conjunction with an antibiotic versus antibiotic alone. ATL313 also improved survival from endotoxic shock when compared to PBS treatment (90% vs. 40%, p = 0.005). The serum concentrations of TNF-alpha, MIP-1 alpha, MCP-1, IFN-gamma, and IL-17 were decreased by ATL313 after LPS injection (p < 0.05). Additionally, ATL313 increased the concentration of IL-10 under the same conditions (p < 0.05). Circulating white blood cell concentrations were higher in ATL313 treated animals (p < 0.01).. Further studies are warranted to determine the clinical utility of ATL313 as a novel treatment for sepsis. Topics: Animals; Anti-Inflammatory Agents; Ceftriaxone; Cytokines; Disease Models, Animal; Escherichia coli Infections; Female; Inflammation; Leukocytes; Lipopolysaccharides; Mice; Mice, Inbred BALB C; Mice, Inbred C57BL; Piperidines; Receptor, Adenosine A2A; Sepsis; Staphylococcal Infections; Survival Analysis | 2008 |
Effects of dihydroergotamine on the feline cardiovascular response to intravenous infusion of live Escherichia coli bacteria.
A septic shock state was induced in cats by intravenous infusion of live Escherichia coli bacteria. Cats pretreated with an unspecific 5-HT blocker, dihydroergotamine (DHE), or with a specific 5-HT blocker, ketanserin, were compared with a series receiving bacteria without pretreatment. DHE pretreatment prevented the reduction in systemic arterial blood pressure found in the other series during the 2-hour period of septic shock. Pretreatment could not influence the increased vascular resistance in the pulmonary vascular bed or the early increase in pulmonary arterial blood pressure. Peripheral blood flow distribution was studied using radioactive labelled microspheres. Compared to bacteremia without pretreatment, the 5-HT blockers increased CNS blood flow and ketanserin also prevented the reduction in pancreatic blood flow. Gastric blood flow and gastric mucosal blood flow remained unchanged in all series as did the small intestinal total blood flow. Small intestinal mucosal blood flow, however, was reduced after 2 h of bacteremia. Microscopy revealed no gastric epithelial damage while the jejunal mucosa was characteristically damaged. There was no correlation between the changes in the small intestinal blood flow and the degree of mucosal damage, however, supporting the countercurrent theory for the pathogenesis of these lesions. Topics: Animals; Blood Pressure; Cardiovascular System; Cats; Dihydroergotamine; Escherichia coli Infections; Gastric Mucosa; Intestinal Mucosa; Ketanserin; Piperidines; Regional Blood Flow; Sepsis; Shock, Septic; Vascular Resistance | 1984 |
The role of 5-hydroxytryptamine in the feline response to intravenous infusion of live E. coli.
A standardized septic shock was induced in cats by intravenous infusion of a live E. coli bacteria strain. The bacterial infusion induced a rapid haemodynamic response characterized mainly by a pulmonary arterial hypertension and a late phase characterized by systemic hypotension and hypodynamic circulation. Systemic arterial, pulmonary arterial, portal venous, left atrial pressures, max inspiratory-expiratory pressure difference in the trachea, aortic and intestinal blood flows were monitored. Arterial blood samples were taken for recording the number of circulating platelets and white blood cells and for determining the acid-base balance. The effect of pretreatment with ketanserin, a specific 5-hydroxytryptamine2 (5-HT2)-receptor blocker on these haemodynamic reactions was studied. In short term experiments on non-bacteriaemic control cats, ketanserin prevented the pulmonary hypertension induced by intravenous 5-HT infusions but not the increase in intestinal blood flow. Ketanserin induced a reduction of total peripheral (including intestinal) vascular resistance to blood flow but had no effect on aortic blood flow. After infusion of bacteria, ketanserin pretreated cats were more hypotensive due to a relative peripheral dilatation of the resistance vessels. Ketanserin pretreatment had no effect on the pulmonary vascular reactions, the tracheal pressure difference or the number of circulating platelets or white blood cells. Thus, except for a more pronounced hypotension early after bacterial infusion, ketanserin pretreatment did not influence the haemodynamic response. It is concluded that 5-HT is not of significant importance in the pathogenesis of the haemodynamic reactions following experimental bacteraemia. Topics: Animals; Blood Pressure; Cats; Escherichia coli Infections; Hemodynamics; Intestines; Ketanserin; Lung; Piperidines; Premedication; Regional Blood Flow; Shock, Septic; Time Factors; Vascular Resistance | 1983 |
[Effect of reduced gastrointestinal motility on the regulation of gastrointestinal flora and the pathogenesis of coli enterotoxinemia in market swine].
Opium tincture and Spasmentral were applied to piglets early after weaning and reduced their gastro-intestinal motility, which, however, caused only very minor changes in quantitative germ flora composition in those first days. Short-time suppression of gastro-intestinal motility obviously does not result in detrimental consequences to the organism as a whole, since there seem to be several factors which are involved in the control and regulation of the intestinal germ flora. Impairment of gastro-intestinal motility appeared to be of no importance to the pathogenesis of coli-enterotoxaemia, as it was not followed by higher incidence of the disease. Topics: Animals; Bacteria; Dexetimide; Digestive System; Escherichia coli Infections; Gastrointestinal Motility; Opium; Piperidines; Species Specificity; Swine; Swine Diseases | 1979 |
1-Methyl-2-nitroimidazol-5-yl derivatives. IVth Communication.
The chemico-physical data and antimicrobial activities are described of a new series of 2-nitroimidazole derivatives prepared by condensing 1-methyl-2-nitroimidazole-5-carboxaldehyde with N-substituted hydroxylamines, N-aminopiperazines and N-aminopiperidines. Topics: Animals; Anti-Bacterial Agents; Bacteria; Escherichia coli Infections; Mice; Nitroimidazoles; Piperazines; Piperidines; Staphylococcal Infections; Structure-Activity Relationship | 1977 |
The in vivo formation of N-nitrosamines in the rat bladder and their subsequent absorption.
Experiments are described which demonstrate the production of nitrosamine in vivo in the bladder of rats with experimental bladder infections. The absorption of nitrosamines from the bladder into the circulating blood is also described. Topics: Absorption; Animals; Carbon Radioisotopes; Chromatography, Gas; Chromatography, Thin Layer; Cricetinae; Dimethylamines; Escherichia coli Infections; Male; Nitrates; Nitrosamines; Piperidines; Rats; Tritium; Urinary Bladder; Urinary Bladder Diseases | 1974 |
[Bacteriological studies on rifampicin, a new antibiotic. 2. Antimicrobial activity of desacetyl-rifampicin].
Topics: Animals; Bacteria; Drug Resistance, Microbial; Escherichia coli Infections; Mice; Microbial Sensitivity Tests; Nalidixic Acid; Piperidines; Rifampin; Staphylococcal Infections | 1970 |