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Abstract

BackgroundIn liver surgery, ischemia/reperfusion injury occasionally leads to liver failure by activating Kupffer cells (KCs) and leukocytes. However, few reports have demonstrated a relationship between KCs and platelets in vivo. This study investigated the relationship between these cells using intravital microscopy.Materials and methodsMale Wistar rats were divided into two groups: (1) KC+ group, receiving 1 mL saline; and (2) KC− group, intravenously injected with liposome-encapsulated dichloromethylene disphosphonate for elimination of KCs. At 48 h after administration, 20 min of total normothermic hepatic ischemia was induced. Rhodamine-6G-labeled platelets and sinusoidal alterations were monitored using intravital microscopy up to 120 min after reperfusion. P-selectin, accumulated leukocytes and morphological damage, and alanine aminotransferase were evaluated.ResultsIn the KC+ group, numbers of adherent platelets increased significantly within 30 min after reperfusion. Endothelial cells of sinusoids in which KCs were mainly located were destroyed and the sinusoids were significantly constricted after reperfusion. Conversely, in the KC− group, adherent platelets in sinusoids were suppressed, and sinusoidal perfusion, endothelial cell damage and serum alanine aminotransferase levels were significantly improved. P-selectin on sinusoidal endothelial cells was not observed up to 120 min after reperfusion in either group.ConclusionsAdherent platelets appear to reflect activation of KCs and lead to leukocyte accumulation, resulting in sinusoidal perfusion disturbance and liver failure. Evaluation of adherent platelets in the microcirculation offers an important marker of hepatic injury.

Journal

  • Journal of surgical research

    Journal of surgical research 149(2), 192-198, 2008-10

    Elsevier Inc.

Cited by:  3

Keywords

Codes

  • NII Article ID (NAID)
    120000830522
  • NII NACSIS-CAT ID (NCID)
    AA00708021
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    0022-4804
  • Data Source
    CJPref  IR 
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