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Impaired functions of normal peripheral polymorphonuclear leukocytes in cirrhotic ascitic fluid

L Lebrun1, G Pelletier, M J Briantais

  • 1INSERM U-131, Clamart, Hôpital de Bicêtre, Le Kremlin Bicêtre, France.

Journal of Hepatology
|September 1, 1992
PubMed

Insights

Polymorphonuclear (PMN) cell function is impaired in cirrhotic ascites, increasing infection risk. Malignant ascites shows higher PMN function, suggesting suppressive factors in cirrhosis contribute to spontaneous bacterial peritonitis.

Area of Science:

  • Immunology
  • Gastroenterology
  • Cell Biology

Background:

  • Ascitic fluid in cirrhosis is prone to infection, particularly spontaneous bacterial peritonitis (SBP).
  • Polymorphonuclear (PMN) cells are crucial for immune defense against bacterial infections.
  • Understanding PMN function in ascites is vital for managing cirrhotic patients.

Purpose of the Study:

  • To investigate and compare the function of normal PMN cells in cirrhotic versus malignant ascites.
  • To identify factors within ascites that may suppress or support PMN function.
  • To elucidate the role of PMN dysfunction in the susceptibility of cirrhotic patients to SBP.

Main Methods:

  • Assessed PMN function using a chemiluminescence assay with opsonized zymosan.
  • Utilized microbiological phagocytosis assessments for confirmation.
  • Investigated suppressive and supportive factors via ascitic fluid dilutions and cell-free chemiluminescence.

Main Results:

  • PMN chemiluminescence response was significantly higher in malignant ascites (0.84) compared to cirrhotic ascites (0.15).
  • Microbiological phagocytosis assays confirmed these findings.
  • Evidence of suppressive factors in malignant ascites and a deficiency in supportive factors (beyond C3) in cirrhotic ascites was found.

Conclusions:

  • Impaired PMN oxidative metabolite production in cirrhotic ascites contributes to increased susceptibility to SBP.
  • Differences in PMN function between cirrhotic and malignant ascites highlight distinct pathomechanisms.
  • Further research into supportive factors in cirrhotic ascites may reveal therapeutic targets.

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