title: Increased plasma concentrations of soluble tumor necrosis factor receptors in sepsis syndrome: correlation with plasma creatinine values.
abstract: OBJECTIVE
  Tumor necrosis factor (TNF) is an important mediator in the complex pathophysiology of sepsis syndrome. Although a positive correlation with mortality rate has been demonstrated, TNF has not been found consistently in sepsis. Since prolonged increases in soluble TNF receptor concentrations were demonstrated after endotoxin and TNF administration, we investigated whether the measurement of TNF receptor concentrations could provide a better indicator of disease than plasma TNF and interleukin (IL)-6 concentrations.
  
  
  METHODS
  Prospective analysis.
  
  
  METHODS
  General intensive care unit (ICU) of a university hospital.
  
  
  METHODS
  Twenty-six patients with sepsis syndrome and proven bacteremia.
  
  
  RESULTS
  Plasma peak concentrations of the soluble 55-kilodalton molecular weight TNF receptor were significantly higher (p < .005) in nonsurvivors compared with survivors of sepsis syndrome, whereas the difference in peak concentrations of the soluble 75-kilodalton TNF receptor did not reach significance (p = .06). In contrast to TNF peak concentrations (p = .14), significantly higher (p < .05) IL-6 peak concentrations were measured in nonsurvivors. Besides the positive correlation between the soluble 55-kilodalton TNF receptor and the soluble 75-kilodalton TNF receptor (r2 = .68; p < .0001), peak concentrations of both soluble 55-kilodalton TNF receptor and 75-kilodalton TNF receptor correlated significantly with plasma creatinine values, an indicator of renal function (r2 = .60; p < .0001 and r2 = .44; p < .001, respectively). Plasma creatinine concentrations were significantly higher in nonsurvivors (p < .001).
  
  
  CONCLUSIONS
  In the population studied, plasma-soluble TNF receptor concentrations correlated with outcome as well as with plasma creatinine concentrations. The data presented suggest that increased plasma-soluble TNF receptor concentrations in patients with sepsis syndrome are merely the result of renal failure complicating sepsis, and are similarly correlated with mortality rate.
authors.affiliation: Department of Surgery, University Hospital Maastricht, University of Limburg, The Netherlands.
authors.forename: A H
authors.initials: AH
authors.lastname: Froon
authors.forename: M H
authors.initials: MH
authors.lastname: Bemelmans
authors.forename: J W
authors.initials: JW
authors.lastname: Greve
authors.forename: C J
authors.initials: CJ
authors.lastname: van der Linden
authors.forename: W A
authors.initials: WA
authors.lastname: Buurman
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016470:Bacteremia / Q000097:blood* / Q000150:complications / Q000401:mortality*; D003404:Creatinine / Q000097:blood*; D016638:Critical Illness; D005260:Female; D017052:Hospital Mortality; D006801:Humans; D015850:Interleukin-6 / Q000097:blood*; D008297:Male; D008875:Middle Aged; D008970:Molecular Weight; D011237:Predictive Value of Tests; D011379:Prognosis; D011446:Prospective Studies; D018124:Receptors, Tumor Necrosis Factor / Q000032:analysis*; D051437:Renal Insufficiency / Q000150:complications; D012720:Severity of Illness Index; D012772:Shock, Septic / Q000097:blood* / Q000150:complications / Q000401:mortality*; D015996:Survival Rate; D013577:Syndrome; D014409:Tumor Necrosis Factor-alpha / Q000032:analysis*
chemical_list: D015850:Interleukin-6; D018124:Receptors, Tumor Necrosis Factor; D014409:Tumor Necrosis Factor-alpha; D003404:Creatinine