ABSTRACT
Background: Spontaneous bacterial peritonitis [SBP] is a frequently encountered and important complication of decompensated liver cirrhosis. The immune system plays an important role in the development or eradication of this infection. A number of compositional and functional alterations in immune system cells have been demonstrated in cirrhotic patients: however, there is a lack of knowledge about this issue in ascitic infections
Aim of the study: The aim of the present study was to evaluate lymphocyte subsets and levels of some ascitic and lymphocytic intracytoplasmic cytokines in decompensated cirrhotic patients with or without spontaneous bacterial peritonitis which may help to understand the role of immune system in pathogenesis of SBP and consequently introduction of new therapeutic modalities
Subjects and methods: This case-control study included 50 decompensated cirrhotic patients [37 male. 13 female] from gastroenterology and hepatology unit of internal medicine department; Assiut university hospital with different etiologies. Patients with ascitic polymorphonuclear leukocyte count >/=250/mm[3] and/or positive ascitic bacterial cultures were classified as the 'patients group' [n=25, mean +/- SD of age was 57.84 +/- 6.66 years]. Patients with ascitic poly morphonuclear leukocyte count <250/mm[3] and/or negative ascitic bacterial cultures were classified as the controls group [n=25, mean +/- SD of age was 60.36 +/- 6.51years]. Comparison was made between the patients and controls groups for the following parameters: ascites leukocyte counts and differentiations; ascitic fluid protein; albumin levels and serum-ascites albumin gradients; flow cytometric detection of ascitic lymphocyte subsets [CD3, CD4. CD8, CD4/CD8 ratio. CD19, CD45] and ascitic cytokine TNF-alpha
Results: Ascitic total protein and albumin levels were significantly decreased in patients group. The C4, CD19. CD45 and CD4/CD8 ratio were significantly decreased in the patients group. Furthermore, ascites CD3, CD8 and TNF-alpha levels were significantly elevated in this group. The incidence of renal impairment, gastrointestinal bleeding and hepatic encephalopathy was higher in patients group and there was a significant correlation between TNF-alpha and renal impairment in this group
Conclusion: These results suggest that a cytotoxic, especially Th1, immune response predominates in ascites infections. It also demonstrates that TNF-alpha might he involved in the pathogenesis of ascites infections