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Isolation, Characterization, and Purification of Macrophages from Tissues Affected by Obesity-related Inflammation
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Mononuclear macrophages in pathogenesis of acute lung injury during acute obstructive cholangitis

Hu-Yi Feng1, Yu-Jun Shi, Chuan-Xin Wu

  • 1Department of General Surgery, Second College of Clinical Medicine & Second Affiliated Hospital, Chongqing University of Medical Sciences, Chongqing 400010, China.

Hepatobiliary & Pancreatic Diseases International : HBPD INT
|November 11, 2003
PubMed
Abstract

Insights

Mononuclear macrophages play a key role in acute lung injury during obstructive cholangitis. Their dysfunction, particularly decreased Kupffer cell activity, contributes to lung damage and inflammation.

Area of Science:

  • Immunology
  • Pathophysiology
  • Gastroenterology

Background:

  • Acute obstructive cholangitis (AOC) can lead to systemic complications, including acute lung injury (ALI).
  • The role of mononuclear macrophages in the development of ALI during AOC is not fully understood.

Purpose of the Study:

  • To investigate the involvement of mononuclear macrophages in the pathogenesis of ALI associated with AOC.
  • To correlate macrophage behavior with pulmonary injury markers in an AOC rat model.

Main Methods:

  • An AOC rat model was established by ligating and injecting the common bile duct with Escherichia coli.
  • Kupffer cell (KC) phagocytic function, alveolar macrophage (AM) counts, lung tissue water content, lipid peroxide (LPO), and superoxide dismutase (SOD) levels were measured at various time points post-operation.
  • Liver and lung tissues were examined morphologically using light and electron microscopy.

Main Results:

  • KC phagocytic function initially increased then significantly decreased in AOC rats compared to controls.
  • Alveolar macrophage numbers, lung water content, and LPO levels increased, while SOD levels decreased in AOC rats.
  • Morphological analysis revealed KC alterations and significant lung tissue injury, including inflammation and circulatory disturbances in AOC rats.

Conclusions:

  • Decreased KC function and activated AMs releasing free radicals contribute to ALI in AOC.
  • Macrophage dysfunction is closely linked to ALI development and may play a crucial role in multiple organ damage during AOC.

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