Abstract:
BACKGROUND:The development of liver failure significantly influences prognosis during the course of major septic complications. Although the underlying cause for septic liver failure is still unclear, research using animal models has demonstrated that an increased nitric oxide (NO) synthesis compromises detoxification processes in the liver. METHODS:In the present study, serum NO levels were measured by high-performance liquid chromatography (HPLC) and aminopyrine breath test (ABT) scores, reflecting the in vivo activity of cytochrome P450-dependent liver enzymes, were investigated in 42 patients (23 who survived sepsis [survivors]/19 patients who ultimately died of sepsis [nonsurvivors]) suffering from major septic complications after abdominal surgery. Additionally, TNF-alpha serum levels, serving as indicators for major systemic inflammation, were monitored using enzyme-linked immunosorbent assay (ELISA). RESULTS:The increased serum NO levels that were found during sepsis correlated with the severity of the septic course. Compared with preoperative values of 42.77 +/- 5.84 mM, nitrite/nitrate levels reached 72.88 +/- 10.16 mM in early sepsis. An increased NO synthesis also was accompanied by a rise in serum TNF-alpha levels. Monitoring of liver function by ABT allowed an early differentiation between transient sepsis and sepsis with a lethal outcome (P=.006). In contrast, cytochrome P450 activity as measured by the ABT was significantly diminished in septic patients (0.45 +/- 0.02 [% dose x kgBW per (mmol CO2)-1] before sepsis onset/0.16 +/- 0.01 [% dose x kgBW per (mmol CO2)-1] in sepsis). Like the NO and TNF-alpha levels, ABT scores showed a difference between transient sepsis and sepsis with a lethal outcome. Serum NO levels were inversely correlated with ABT scores (P=.022) and positively correlated with TNF-alpha levels (P=0.015) in the late phase of sepsis. Serum TNF-alpha levels and ABT scores were inversely correlated in the early (P=.027), as well as in the late (P=.015) phases of sepsis. CONCLUSIONS:This study supports the hypothesis that septic liver failure is linked to the induction of NO synthesis in major systemic inflammation. Therefore, the ABT provides a clinically useful tool for predicting the outcome in the early stages of sepsis. This may aid in the decision-making process when early surgical intervention is considered.
journal_name
Surgeryjournal_title
Surgeryauthors
Novotny AR,Emmanuel K,Maier S,Westerholt A,Weighardt H,Stadler J,Bartels H,Schwaiger M,Siewert JR,Holzmann B,Heidecke CDdoi
10.1016/j.surg.2006.08.011subject
Has Abstractpub_date
2007-03-01 00:00:00pages
376-84issue
3eissn
0039-6060issn
1532-7361pii
S0039-6060(06)00568-Xjournal_volume
141pub_type
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