| Phagocytic responses of peritoneal macrophages and neutrophils are different in rats following prolonged exercise. | |
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MedLine Citation:
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PMID: 21243292 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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OBJECTIVE: To analyze the effects of exhausting long-duration physical exercise (swimming) sessions of different durations and intensities on the number and phagocytic capacity of macrophages and neutrophils in sedentary rats. INTRODUCTION: Exercise intensity, duration and frequency are important factors in determining immune response to physical effort. Thus, the effects of exhausting long-duration exercise are unclear. METHODS: Wistar rats were divided into two groups: an untreated group (macrophage study) and oyster glycogen-treated rats (neutrophil study). In each group, the animals were subdivided into five groups (10 rats per group): unexercised controls, an unadapted low-intensity exercise group, an unadapted moderate-intensity exercise group, a preadapted low-intensity exercise group and a preadapted moderate-intensity exercise group. All exercises were performed to exhaustion, and preadaptation consisted of 5, 15, 30 and 45 min sessions. RESULTS: Macrophage study: the number of peritoneal macrophages significantly decreased (9.22 ± 1.78 x 10(6)) after unadapted exercise but increased (21.50 ± 0.63 x 10(6)) after preadapted low-intensity exercise, with no changes in the moderate-intensity exercise group. Phagocytic capacity, however, increased by more than 80% in all exercise groups (low/moderate, unadapted/preadapted). Neutrophil study: the number of peritoneal neutrophils significantly decreased after unadapted (29.20 ± 3.34 x 10(6)) and preadapted (50.00 ± 3.53 x 10(6)) low-intensity exercise but increased after unadapted (127.60 ± 5.14 x 10(6)) and preadapted (221.80 ± 14.85 x 10(6)) moderate exercise. Neutrophil phagocytic capacity decreased by 63% after unadapted moderate exercise but increased by 90% after corresponding preadapted sessions, with no changes in the low-intensity exercise groups. CONCLUSION: Neutrophils and macrophages of sedentary rats respond differently to exercise-induced stress. Adaptation sessions reduce exercise-induced stress on the immune system. |
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Authors:
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Clílton K O Ferreira; Jonato Prestes; Felipe F Donatto; Rozangela Verlengia; James W Navalta; Cláudia R Cavaglieri |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Clinics (São Paulo, Brazil) Volume: 65 ISSN: 1980-5322 ISO Abbreviation: Clinics (Sao Paulo) Publication Date: 2010 |
Date Detail:
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Created Date: 2011-01-18 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101244734 Medline TA: Clinics (Sao Paulo) Country: Brazil |
Other Details:
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Languages: eng Pagination: 1167-73 Citation Subset: IM |
Affiliation:
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Health Science Faculty, Methodist University of Piracicaba, São Paulo, Brazil. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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