Document Detail


Effects of exercise on macrophage activation for antitumor cytotoxicity.
MedLine Citation:
PMID:  8063684     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Recent evidence suggests that exercise affects macrophage functions and that amount of exercise may be important. We determined effects of moderate (MOD) and exhaustive treadmill running (EXH) on 1) ability of macrophages to become activated for antitumor cytotoxicity after injection of heat-inactivated Propionibacterium acnes in vivo, 2) macrophage responsiveness to activating agents lipopolysaccharide and interferon-gamma, and 3) role of glucocorticoids and various macrophage metabolic products in modulating cytotoxicity in exercised animals. Male C3H/HeN mice were randomly assigned to MOD (18 m/min, 5% grade, 30 min/day) or EXH (18-35 m/min, 5%, 2-4 h) on a motor-driven treadmill. Control animals were kept in simulated treadmill lanes located directly over the runners. In general, both MOD and EXH increased cytotoxicity (42 and 22%, respectively, across all experiments; P < 0.05). Enhanced cytotoxicity was not due to altered macrophage adherence, tumor necrosis factor-alpha, interleukin-1 beta, or reactive oxygen species. Reactive nitrogen species were responsible for enhanced toxicity in EXH only. Macrophage cytotoxicity was further increased by lipopolysaccharide and interferon-gamma to a similar maximal level that was the same in all groups. Plasma corticosterone was elevated two- and fourfold in MOD and EXH, respectively, but there was no correlation between plasma corticosterone and macrophage cytotoxicity when compared across all groups even though cells were sensitive to steroid-mediated suppression in vitro. However, consistent with a corticosterone effect, EXH reduced the number of peritoneal macrophages elicited during P. acnes inflammation and abolished the typical exercise-induced increase in cytotoxicity of activated macrophages.(ABSTRACT TRUNCATED AT 250 WORDS)
Authors:
J A Woods; J M Davis; E P Mayer; A Ghaffar; R R Pate
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of applied physiology (Bethesda, Md. : 1985)     Volume:  76     ISSN:  8750-7587     ISO Abbreviation:  J. Appl. Physiol.     Publication Date:  1994 May 
Date Detail:
Created Date:  1994-09-22     Completed Date:  1994-09-22     Revised Date:  2013-09-26    
Medline Journal Info:
Nlm Unique ID:  8502536     Medline TA:  J Appl Physiol (1985)     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2177-85     Citation Subset:  IM    
Affiliation:
Department of Exercise Science, School of Public Health, University of South Carolina, Columbia 29208.
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MeSH Terms
Descriptor/Qualifier:
Animals
Cytotoxicity, Immunologic / drug effects,  physiology*
Glucocorticoids / blood,  pharmacology
Immune Adherence Reaction
Inflammation / physiopathology
Interferon-gamma / pharmacology
Interleukin-1 / pharmacology
Lipopolysaccharides / pharmacology
Macrophage Activation / drug effects,  physiology*
Male
Mice
Mice, Inbred C3H
Neoplasms / immunology*
Nitrogen Oxides / metabolism
Physical Exertion / physiology*
Propionibacterium acnes / immunology
Reactive Oxygen Species / metabolism
Tumor Necrosis Factor-alpha / pharmacology
Chemical
Reg. No./Substance:
0/Glucocorticoids; 0/Interleukin-1; 0/Lipopolysaccharides; 0/Nitrogen Oxides; 0/Reactive Oxygen Species; 0/Tumor Necrosis Factor-alpha; 82115-62-6/Interferon-gamma

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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