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Isolating Lymphocytes from the Mouse Small Intestinal Immune System
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Intestinal IgA positive lymphocytes in acute liver necrosis decrease due to lymphocyte homing disturbance and

Jinlong Fu1, Guodong Li2, Jianliang Wu3

  • 1Gastroenterology, The Affiliated Hospital，Hangzhou Normal University, China.

Revista Espanola De Enfermedades Digestivas
|October 16, 2018
PubMed
Summary

Acute liver necrosis reduces intestinal IgA+ lymphocytes due to impaired lymphocyte homing and increased apoptosis. LTβR pre-treatment partially restores IgA+ cells by upregulating MAdCAM-1 expression.

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Area of Science:

  • Immunology
  • Gastroenterology
  • Hepatology

Background:

  • Intestinal IgA+ lymphocytes decrease in acute liver necrosis, but the underlying mechanisms are unclear.
  • Understanding these mechanisms is crucial for developing therapeutic strategies.

Purpose of the Study:

  • To investigate the roles of lymphocyte homing and apoptosis in the reduction of intestinal IgA+ lymphocytes during acute liver necrosis.
  • To assess the effects of Lymphotoxin-beta receptor (LTβR) pre-treatment on these processes.

Main Methods:

  • Establishment of an acute liver necrosis mouse model.
  • Assessment of intestinal mucosal addressin cell adhesion molecule-1 (MAdCAM-1) expression, apoptosis rates, IgA+ cell counts, and secretory IgA (SIgA) levels.
  • Evaluation of LTβR pre-treatment effects.

Main Results:

  • Acute liver necrosis significantly decreased MAdCAM-1 mRNA and protein expression.
  • LTβR pre-treatment partially restored MAdCAM-1 expression, IgA+ lymphocytes, and SIgA levels.
  • Increased enterocyte apoptosis was observed in both the necrosis and LTβR pre-treatment groups.

Conclusions:

  • Dysfunctional lymphocyte homing and enterocyte apoptosis contribute to decreased intestinal IgA+ lymphocytes in acute liver necrosis.
  • LTβR pre-treatment partially ameliorates these changes by enhancing MAdCAM-1 expression, not by inhibiting apoptosis.