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Malnutrition Impairs CD11b/CD18 Expression on Circulating Polymorphonuclear Neutrophils and Subsequent Exudation into Inflammatory Sites in the Early Phase of Glycogen-Induced Murine Peritonitis

Department of Surgery, Faculty of Medicine, The University of Tokyo, Japan, ikeda-1su{at}h.u.-tokyo.ac.jp

Hideaki Saito, MD

Surgical Center, The University of Tokyo, Japan

Tomomi Inoue, MD

Department of Surgery, Faculty of Medicine, The University of Tokyo, Japan

Kazuhiko Fukatsu, MD

Department of Surgery, Faculty of Medicine, The University of Tokyo, Japan

Ilsoo Han, MD

Department of Surgery, Faculty of Medicine, The University of Tokyo, Japan

Satoshi Furukawa, MD

Department of Surgery, Faculty of Medicine, The University of Tokyo, Japan

Takeaki Matsuda, MD

Department of Surgery, Faculty of Medicine, The University of Tokyo, Japan

Akio Hidemura, MD

Department of Surgery, Faculty of Medicine, The University of Tokyo, Japan

Background: The effects of malnutrition on polymorphonuclear neutrophil (PMN) exudation are not well understood. The purpose of this study was to examine the effects of short-term dietary restriction on adhesion molecule expression on circulating PMNs and PMN exudation into the inflamed site in a glycogen-induced peritonitis model. Methods: Twelve mice were randomly assigned to one of two groups. The ad libitum and diet-restricted groups received mouse chow ad libitum (estimated consumption: 132 g/kg per day) and 33 g/kg per day, respectively, for 7 days. Then, 2 mL of a 1% glycogen solution was intraperitoneally administered to all mice. After 4 hours, the animals were killed. Whole blood was drawn by cardiac puncture. Peritoneal exudative cells were harvested by lavaging the peritoneal cavity. Expressions of CD11b, CD18, and CD62L were measured by flow cytometry. Results: Dietary restriction did not affect the numbers of circulating leukocytes, PMNs, or monocytes. However, CD11b and CD18 expressions on circulating PMNs were significantly lower in the diet-restricted than in the ad libitum group. In contrast, CD62L expression on circulating PMNs was not affected by dietary restriction. The number of exudative PMNs was significantly lower in the diet-restricted group than in the ad libitum group. The expressions of CD11b, CD18 and CD62L on exudative PMNs were unaffected by dietary restriction. There was a significant positive correlation between exudative PMN numbers and CD18 expression on circulating PMNs. Conclusions: Severe dietary restriction in our murine model decreased β₂ integrin expression on circulating PMNs and inhibited PMN exudation into inflamed sites in the early phase of inflammation. These events may increase susceptibility to bacterial infection. Nutritional replenishment may improve host defense in part by enhancing PMN adhesion molecule expression. (Journal of Parenteral and Enteral Nutrition 24:276-279, 2000)

Journal of Parenteral and Enteral Nutrition, Vol. 24, No. 5, 276-279 (2000)
DOI: 10.1177/0148607100024005276


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