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Table of Contents
Vol. 12, No. 3, 2005
Issue release date: May 2005
Section title: Original Paper
Neuroimmunomodulation 2005;12:173–181
(DOI:10.1159/000084850)

Effects of Space Flight Conditions on the Function of the Immune System and Catecholamine Production Simulated in a Rodent Model of Hindlimb Unloading

Aviles H.a, b · Belay T.b · Vance M.b · Sonnenfeld G.a, b
aDepartment of Biology, Binghamton University, Binghamton, N.Y., and bDepartment of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, Ga., USA

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: April 15, 2004
Accepted: September 16, 2004
Published online: May 17, 2005
Issue release date: May 2005

Number of Print Pages: 9
Number of Figures: 3
Number of Tables: 4

ISSN: 1021-7401 (Print)
eISSN: 1423-0216 (Online)

For additional information: http://www.karger.com/NIM

Abstract

The rodent model of hindlimb unloading has been successfully used to simulate some of the effects of space flight conditions. Previous studies have indicated that mice exposed to hindlimb-unloading conditions have decreased resistance to infections compared to restrained and normally housed control mice. Objective: The purpose of this study was to clarify the mechanisms involved in resistance to infection in this model by examining the effects of hindlimb unloading on the function of the immune system and its impact on the production of catecholamines. Methods: Female Swiss Webster mice were hindlimb-unloaded during 48 h and the function of the immune system was assessed in spleen and peritoneal cells immediately after this period. In addition, the kinetics of catecholamine production was measured throughout the hindlimb-unloading period. Results: The function of the immune system was significantly suppressed in the hindlimb-unloaded group compared to restrained and normally housed control mice. Levels of catecholamines were increased in the hindlimb-unloaded group and peaked at 12 h following the commencement of unloading. Conclusion: These results suggest that physiological responses of mice are altered early after hindlimb unloading and that catecholamines may play a critical role in the modulation of the immune system. These changes may affect the ability of mice to resist infections.

© 2005 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: April 15, 2004
Accepted: September 16, 2004
Published online: May 17, 2005
Issue release date: May 2005

Number of Print Pages: 9
Number of Figures: 3
Number of Tables: 4

ISSN: 1021-7401 (Print)
eISSN: 1423-0216 (Online)

For additional information: http://www.karger.com/NIM


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