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Increased lymphocyte transport by lipid absorption in rat mesenteric lymphatics
S Miura1, E Sekizuka, H Nagata
1Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan.
The American Journal of Physiology
|November 1, 1987
Summary
Olive oil intake significantly increases lymphocyte transport in intestinal lymphatics within two hours. This finding highlights the role of fat absorption in immune cell traffic from the gut.
Area of Science:
- Immunology
- Gastroenterology
- Physiology
Background:
- Lymphocyte transport is crucial for immune surveillance in the gut.
- The influence of nutritional absorption on lymphocyte traffic remains incompletely understood.
Purpose of the Study:
- To investigate the effect of olive oil administration on lymphocyte transport via mesenteric lymphatics.
- To explore the potential role of nutritional (lipid) absorption in regulating intestinal lymphocyte traffic.
Main Methods:
- Administration of olive oil to rats with lymphatic fistulas.
- High-speed microscopic video system for analyzing lymphocyte transport.
- Densitometric analysis of video images to quantify lipid absorption.
Main Results:
- Olive oil administration markedly increased lymphocyte flux within 2 hours.
- Enhanced lymphatic contraction frequency was observed post-olive oil intake.
- Increased lymphocyte transport preceded peak lipid absorption and returned to baseline levels during maximal absorption.
Conclusions:
- Fat absorption is a significant factor influencing lymphocyte transport in the intestinal lymphatic system.
- Rapid, transient changes in lymphocyte flux are linked to the early stages of lipid absorption.