| Changes in lymphocyte HSP70 levels in women handball players throughout 1 year of training: the role of estrogen levels. | |
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MedLine Citation:
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PMID: 22294379 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Heat shock protein 70 (HSP70) is a chaperone that maintains protein conformation during heat stress. It has recently been observed that HSP70 may be released from cells in response to increased energy demand (e.g., exercise) and/or oxidative stress. Since HSP70 levels should change in response to athletic training, we have investigated whether blood HSP70 levels in young women handball players change over a complete training season. Thirty women handball players (12-24 years old) were divided into low (≥30 pg mL(-1)) (LE) and normal (30-330 pg mL(-1)) (NE) estradiol groups. HSP70 levels in lymphocytes and plasma and blood redox parameters were evaluated over 1 year (2009), with sampling at the beginning, middle, and end of the season. We observed no changes in superoxide dismutase activity or protein carbonyl or extracellular HSP70 levels, while catalase activity increased at the middle of the season in the NE group, and the thiobarbituric acid species levels in both groups were higher at the beginning of the season than at the middle or end. The lymphocyte HSP70 content was higher at the middle and end than at the beginning of the season in the NE group and also higher in the LE group than in the NE group at the beginning of the season. These results suggest that plasma estradiol levels may play an important role in exercise training and that the intracellular HSP70 content, a biomarker for inflammation, is affected by both estradiol levels and exercise-induced oxidative stress. |
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Authors:
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Maria Helena Weber; Ricardo Fagundes da Rocha; Carlos Eduardo Schnorr; Rafael Schröder; José Cláudio Fonseca Moreira |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-2-1 |
Journal Detail:
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Title: Journal of physiology and biochemistry Volume: - ISSN: 1877-8755 ISO Abbreviation: - Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-2-1 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9812509 Medline TA: J Physiol Biochem Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Nutrition, Clinic, Institute of Health Sciences, Superior Teaching Establishment Federation University (Universidade FEEVALE), Novo Hamburgo, Rio Grande do Sul, Brazil, mariahelena.weber@yahoo.com.br. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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