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Related Experiment Videos

Mesenteric lymph duct ligation prevents shock-induced RBC deformability and shape changes.

Sergey B Zaets1, Tamara L Berezina, J Caruso

  • 1Department of Surgery, VA New Jersey Healthcare System, East Orange, New Jersey, USA.

The Journal of Surgical Research
|February 20, 2003
PubMed
Summary
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Trauma and hemorrhagic shock damage red blood cells (RBCs) via gut-derived factors in lymph. Ligation of the mesenteric lymph duct prevented this RBC injury, preserving deformability and shape.

Area of Science:

  • Physiology
  • Trauma Research
  • Hematology

Background:

  • The mechanisms behind red blood cell (RBC) deformability and shape changes following trauma and hemorrhagic shock (T/HS) are not fully understood.
  • It is hypothesized that gut injury contributes to RBC damage, mediated by factors transported via intestinal lymph.

Purpose of the Study:

  • To investigate the role of gut-derived factors in T/HS-induced RBC injury.
  • To determine if interrupting intestinal lymph flow prevents RBC damage after T/HS.

Main Methods:

  • RBC deformability was assessed using a laser-assisted ektacytometer, measuring the elongation index.
  • RBC shape was examined via scanning electron microscopy.
  • Experiments were conducted on rats subjected to T/HS, with and without mesenteric lymph duct ligation.

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Main Results:

  • In rats undergoing T/HS without lymph duct ligation, the RBC elongation index significantly decreased post-shock, indicating reduced deformability.
  • Rats with ligated lymph ducts showed no significant decrease in RBC deformability after T/HS.
  • Electron microscopy revealed a higher percentage of abnormally shaped RBCs in T/HS rats compared to those with ligated lymph ducts.

Conclusions:

  • Ligating the mesenteric lymph duct effectively prevented T/HS-induced damage to RBCs.
  • This suggests that gut-derived factors transported through intestinal lymph play a critical role in T/HS-related RBC injury.
  • Preserving RBC deformability may be crucial in mitigating T/HS-induced microcirculatory dysfunction and organ damage.