Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UNIPROT:P10145 (IL-8)
 23,849 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

A hyperdynamic sepsis model was set up in seven adult baboons to evaluate neutrophil-activating peptide-1/interleukin (IL)-8 (NAP-1/IL-8), IL-1 beta, IL-6, tumor necrosis factor-alpha (TNF alpha), and IFN-gamma in plasma. By continuous intravenous administration of 10(10) cfu/kg live Escherichia coli over 8 h with additional infusion therapy (less than or equal to 50 ml/kg/h), endotoxin plasma levels of 2.7-22.3 ng/ml were observed. In plasma the kinetics of NAP-1/IL-8 and IL-6 were similar to those of IL-1 at the end of the experiment (8 h) (peak median values, 34, 4197, and 230 ng/ml, respectively). Differences were greatest for IL-6. Monocyte activation during sepsis was confirmed by elevated plasma neopterin levels (91-139 mumol/mmol of creatine). Granulocyte activation was evident from both incipient neutropenia and the massive release of neutrophil elastase into the plasma as measured by a new immunoassay (peak level, 374 ng/ml). Thus, in primate bacteremia, early TNF release is followed by a concomitant increase of NAP-1/IL-8 with plasma kinetics similar to those of IL-6 and IL-1 and accompanied by massive activation of neutrophils.
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PMID:Plasma neutrophil-activating peptide-1/interleukin-8 and neutrophil elastase in a primate bacteremia model. 190 12

The multiorgan failure syndrome caused by group A streptococci (GAS) designated streptococcal toxic shock syndrome (STSS) is believed to be mediated by cytokines induced by superantigens. In order to study the relationship between superantigen production, cytokine levels in patient sera, and clinical GAS manifestation we examined acute-phase sera and strains from 25 patients with GAS bacteremia. The patients had various disease manifestations, including STSS (44%), erysipelas (28%), septicemia (24%), wound infections (16%), and pneumonia (12%). Serotype T1M1 dominated, representing 56% of the isolates, but also strains of other serotypes were identified. The strains were found to produce the streptococcal pyrogenic exotoxins (Spe) A, B, and F, as determined by immuno-blot analyses. There was no difference in amounts of toxin produced between strains isolated from patients with different manifestations of disease. Levels of TNF alpha, IL1 alpha, IL6, IL8, and IFN gamma in acute-phase sera were determined by use of ELISA and RIA assays. The analyses showed higher levels of IL6 in sera from patients with STSS than in sera from patients with bacteremia without shock. TNF alpha was elevated in sera from patients with STSS, as compared to sera from patients with uncomplicated pharyngotonsillitis. No increase in the levels of IL1 alpha, IL8, and IFN gamma could be found in the patient sera and there was no difference in the level of those cytokines between the various patient categories.
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PMID:Correlation between serum TNF alpha and IL6 levels and severity of group A streptococcal infections. 766 74

Interleukin 10 (IL-10) suppresses the production of proinflammatory cytokines in vitro and in murine models of endotoxemia and has been suggested as a candidate for treatment of bacterial septicemia. To investigate the role of IL-10 in meningococcal disease, a sandwich IL-10 enzyme-amplified sensitivity immunoassay was used to quantitate IL-10 in serum and cerebrospinal fluid samples from 41 patients with meningococcal bacteremia or meningitis with or without septic shock. High levels of IL-10 were demonstrated in sera from patients with meningococcal septic shock (mean, 21,221 pg/ml; range, 25 to 64,500 pg/ml). All cases involving fatalities had IL-10 levels in serum of > or = 1,000 pg/ml (mean, 23,058 pg/ml; range, 1,000 to 64,500 pg/ml). Patients with meningococcal meningitis without septic shock had comparably low concentrations of IL-10 in serum (mean, 119 pg/ml; range, 0 to 1,050 pg/ml) but exhibited compartmentalized release of IL-10 in cerebrospinal fluid. Concentrations of IL-10 in serum were positively correlated with the previously reported concentrations of tumor necrosis factor alpha, IL-6, and IL-8 in serum in the same patients. We conclude that IL-10 is extensively activated along with the proinflammatory cytokines during the initial phase of meningococcal septic shock and that IL-10 is associated with fatality in meningococcal disease.
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PMID:High levels of interleukin 10 in serum are associated with fatality in meningococcal disease. 776 88

To evaluate the role of interleukin (IL)-8 in meningococcal disease, a solid-phase double-ligand ELISA was used to quantitate IL-8 in sera and cerebrospinal fluid (CSF) from patients with meningococcal meningitis, bacteremia, or both with or without septic shock. IL-8 was demonstrated in sera from 28 of 62 patients; levels were significantly higher in patients with septic shock without meningitis (median, 36.1 ng/mL) than in patients with other manifestations (median, < 0.02 ng/mL), and 4 of 5 patients who died had high levels. IL-8 was detected in all 27 CSF samples. Serum IL-8 levels correlated highly significantly with those of IL-6 (r = .83) and tumor necrosis factor (TNF; r = .64), while the correlations between corresponding CSF levels were less pronounced (r = .43 and r = .38, respectively) but still significant. Serum IL-8 levels were highest in patients with a symptom history < 12 h. The elimination rate of IL-8 from serum varied and was similar to that of IL-6 and TNF. IL-8 appears to participate in the complex cytokine network during the initial phase of systemic meningococcal infections.
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PMID:Interleukin-8 in serum and cerebrospinal fluid from patients with meningococcal disease. 842 Nov 85

Tumor necrosis factor (TNF) and interleukin (IL)-1 are two cytokines for which naturally occurring inhibitors have been identified. The present study was undertaken to evaluate the extent to which scavenging of TNF in bacteremia attenuates the plasma levels of IL-1 receptor antagonist (IL-1ra) and soluble TNF receptors (sTNFR). Ten male baboons received 2 x 10(9) colony-forming units/kg live Escherichia coli over 2 h and were subjected to either placebo or anti-TNF antibody (anti-TNF Ab) treatment (1 mg/kg CDP571, Celltech, UK) 2 h before E. coli infusion (observation time: 72h). IL-1ra (range: 50-100 ng/ml) and sTNFR (range: 55kDa, 20-25 ng/ml; 75 kDa, 30-35 ng/ml) release was more sustained than that of IL-1 and TNF and was significantly attenuated by anti-TNF treatment, as were the circulating levels of IL-1, IL-8, and monocyte chemotactic peptide-1 (MCP-1) in the anti-TNF Ab group. We conclude that the increase in circulating natural cytokine modulators observed in nonhuman primate bacteremia is under the partial control of endogenous TNF because it was influenced by anti-TNF pretreatment. This attenuation is comparable to the anti-TNF effect on the chemokine MCP-1.
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PMID:Endogenous modulators of TNF and IL-1 response are under partial control of TNF in baboon bacteremia. 894 53

Plasma interleukin-8 (IL-8) interleukin-10 (IL-10), and E-selectin concentrations were studied in 39 neutropenic and 30 non-neutropenic bacteremic patients; 54 nonbacteremic patients were analyzed as controls. Interleukin-8 concentrations were significantly higher in neutropenic than in non-neutropenic bacteremic patients (median 475 vs. 0 pg/ml, p < 0.0001). Median IL-8 and IL-10 levels were higher in bacteremic than in non-bacteremic patients (330 vs. 0 pg/ml, p < 0.0001 and 20 vs. 0 pg/ml, p = 0.04, respectively). In contrast, concentrations of IL-10 were similar in neutropenic and non-neutropenic patients. Median levels of E-selectin were not increased in any of the patient groups. Neutropenic bacteremic patients showed significantly lower concentrations of E-selectin than did non-neutropenic bacteremic patients (p < 0.0001). In conclusion, neutropenic bacteremic patients had significantly higher concentrations of IL-8 than non-neutropenic bacteremic patients. Levels of IL-10 were higher in bacteremic than in nonbacteremic patients, but neutropenic and non-neutropenic patients had similar levels of IL-10. Increased levels of E-selectin were not found in any of the patient groups, although neutropenic patients with bacteremia had lower concentrations than did non-neutropenic patients.
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PMID:Plasma interleukin-8, interleukin-10, and E-selectin levels in neutropenic and non-neutropenic bacteremic patients. 932 70

Enzymes and other factors secreted by degranulating neutrophils (polymorphonuclear leukocytes, PMNs) mediate endothelial injury, thrombosis, and vascular remodeling. In bacteremia and sepsis syndrome and their consequent complications (including acute respiratory distress syndrome and systemic ischemia-reperfusion resulting from septic shock), neutrophil degranulation is an important mechanism of injury. In related studies, we found that human endothelial cells regulate neutrophil degranulation and that inflammatory cytokines induce synthesis of degranulating factors by human endothelial cells. Here we show that lipopolysaccharides (LPS) from gram-negative bacteria were the most potent agonists for release of degranulating activity by endothelial cells when compared to several cytokines and stimulatory factors. LPS also induced the release of degranulating signals for PMNs from a human endothelial cell line, EA.hy 926. Interleukin 8 (IL-8) is synthesized by endothelial and EA.hy 926 cells in response to LPS and induces neutrophil degranulation. However, complementary strategies using receptor desensitization, translation of messenger RNA by Xenopus laevis oocytes, and purification and analysis of factors from conditioned supernatants demonstrated that degranulating factors distinct from IL8 are generated in response to LPS. The characteristics of a partially purified degranulating factor isolated from conditioned supernatants distinguished it from known chemokines and other factors that induce PMN degranulation and are generated by endothelial cells in response to LPS. Thus, cultured human endothelial cells and endothelial cell lines synthesize several unique signaling molecules that can trigger neutrophil granular secretion. If produced in vivo in response to LPS or other pathologic agonists, these degranulating signals may activate PMNs in combination or in sequence, initiating or propagating vascular damage.
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PMID:Bacterial lipopolysaccharide induces endothelial cells to synthesize a degranulating factor for neutrophils. 961 46

The impact of antibiotics on total endotoxemia and circulating tumor necrosis factor (TNF)-alpha, interleukin (IL)-6, and IL-8 in 18 patients with severe bacteremic sepsis or septic shock due to gram-negative species was investigated. Endotoxemia, TNF-alpha, IL-6, and IL-8 were assayed before (H0) and 1 h (H1) and 4 h (H4) after the first antibiotic infusion. Endotoxemia decreased from H0 (median, 0.4 EU/mL; interquartile interval, 0.09-1.23) to H1 (median, 0.19 EU/mL; interquartile interval, 0.07-0.75; P = .03) and remained stable between H1 and H4 (median, 0.12 EU/mL; interquartile interval, 0.09-0.30; P = .4). IL-6 levels fell between H0 and H4 (P = .01) and between H1 and H4 (P = .03). IL-8 was higher at H0 than at H1 (P = .04) and at H4 (P = .01). These results suggest that endotoxemia is not increased by antibiotherapy of severe gram-negative bacteremia.
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PMID:Circulating endotoxin during initial antibiotic treatment of severe gram-negative bacteremic infections. 965 53

A prospective study was performed to assess the potential value of interleukin (IL)-8, IL-6, and C-reactive protein (CRP) serum levels to predict fever, gram-negative bacteremia and complicated infection in neutropenic patients with cancer. Serum samples were obtained three times a week during 208 neutropenic episodes following cytotoxic chemotherapy. Fever of any cause developed during 104 out of 191 evaluable episodes. Serum levels of neither cytokine nor CRP were predictive of fever within more than 24 h before its onset. Unlike CRP, both IL-6 and IL-8 serum levels were significantly different between microbiologically documented infections and unexplained fevers. The highest values of IL-6 and IL-8 were observed in episodes of gram-negative bacteremia. Using receiver-operating-characteristic curves, the analysis of cytokine levels measured around the onset of fever indicated that IL-8 is potentially useful for predicting gram-negative bacteremia, with a high negative predictive value of > 90% and a moderate positive predictive value of 50% (sensitivity, 70%; specificity, 91%). In patients with persistent fever, predictions of further clinical complications, defined as prolonged fever of more than 7 days' duration, pneumonia, shock and/or death due to infection, were best predicted by IL-6. With an IL-6 cutoff value of 250 pg/ml in samples obtained 8 to 32 h after onset of fever, the positive predictive value was 92%, the negative predictive value 91% (sensitivity, 85%; specificity, 95%). The positive predictive value of IL-6 in samples obtained another 24 h later from patients still febrile remained > 90%, but the negative predictive value dropped to 47%. In any of the analyses, the predictive values of CRP levels were poor and inferior to either cytokine. These findings may have clinical value in identifying subgroups of patients requiring different therapeutic approaches.
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PMID:An analysis of interleukin-8, interleukin-6 and C-reactive protein serum concentrations to predict fever, gram-negative bacteremia and complicated infection in neutropenic cancer patients. 971 78

This study investigated whether cytokines and colony-stimulating factors can predict prognosis in patients with postoperative multiple organ failure (MOF). We evaluated 14 patients with postoperative MOF who underwent operation for cardiovascular disease. Seven patients recovered from MOF (survivors) and seven did not recover and died (nonsurvivors). The white blood cell (WBC) count, granulocyte colony-stimulating factor, monocytic colony-stimulating factor, interleukin-6 (IL-6), and IL-8 were measured on the day the patients were judged to be in MOF and each week thereafter until the patients recovered or died. Survivors and nonsurvivors were equivalent in terms of age, gender, proportion of use of extracorporeal circulation, operation time, volume of blood transfusion, time from operation to the onset of MOF, the MOF score, proportion of bacteremia, duration of MOF, and number of failed organs. The mean duration of MOF was less than 2 weeks in both groups; therefore the measurements were compared on the first day of MOF and 1 week later. No significant differences between the two groups in terms of WBC counts, colony-stimulating factors, and IL-6 levels were noted. However, the serum level of IL-8 was significantly higher in nonsurvivors than in survivors. Patients with a high serum levels of IL-8 at the time of MOF had a poor prognosis.
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PMID:Increased serum interleukin-8: correlation with poor prognosis in patients with postoperative multiple organ failure. 974 70


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