The Effects of Omega-3 Fatty Acid Supplementation on Dexamethasone-Induced Muscle Atrophy
Joint Authors
Zanoteli, Edmar
Neves, Juliana de C.
Rizzato, Vanessa R.
Chadi, Gerson
Fappi, Alan
Godoy, Tiago S.
Ruivo Maximino, Jessica
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-05-25
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Corticosteroids cause muscle atrophy by acting on proteasomal and lysosomal systems and by affecting pathways related to muscular trophysm, such as the IGF-1/PI-3k/Akt/mTOR.
Omega-3 fatty acid (n-3) has been used beneficially to attenuate muscle atrophy linked to sepsis and cachexia; however, its effect on dexamethasone-induced muscle atrophy has not been evaluated.
Objectives.
We evaluated whether n-3 supplementation could mitigate the development of dexamethasone-induced muscle atrophy.
Methods.
Two groups of Wistar rats were orally supplemented with n-3 or vehicle solution for 40 days.
In the last 10 days, dexamethasone, or saline solution, was administrated establishing four groups: control, dexamethasone, n-3, and dexamethasone + n-3.
The cross-sectional areas of muscle fibers, gene expression (MyoD, Myogenin, MuRF-1, and Atrogin-1), and protein expression (Akt, GSK3β, FOXO3a, and mTOR) were assessed.
Results.
Dexamethasone induced a significant loss in body and muscle weight, atrophy in type 2B fibers, and decreased expression of P-Akt, P-GSK3β, and P-FOXO3a.
N-3 supplementation did not attenuate the negative effects of dexamethasone on skeletal muscle; instead, it caused atrophy in type 1, 2A, reduced the expression of Myogenin, and increased the expression of Atrogin-1.
Conclusion.
Food supplements containing n-3 are usually healthful, but they may potentiate some of the side effects of glucocorticoids.
American Psychological Association (APA)
Fappi, Alan& Godoy, Tiago S.& Ruivo Maximino, Jessica& Rizzato, Vanessa R.& Neves, Juliana de C.& Chadi, Gerson…[et al.]. 2014. The Effects of Omega-3 Fatty Acid Supplementation on Dexamethasone-Induced Muscle Atrophy. BioMed Research International،Vol. 2014, no. 2014, pp.1-13.
https://search.emarefa.net/detail/BIM-511680
Modern Language Association (MLA)
Fappi, Alan…[et al.]. The Effects of Omega-3 Fatty Acid Supplementation on Dexamethasone-Induced Muscle Atrophy. BioMed Research International No. 2014 (2014), pp.1-13.
https://search.emarefa.net/detail/BIM-511680
American Medical Association (AMA)
Fappi, Alan& Godoy, Tiago S.& Ruivo Maximino, Jessica& Rizzato, Vanessa R.& Neves, Juliana de C.& Chadi, Gerson…[et al.]. The Effects of Omega-3 Fatty Acid Supplementation on Dexamethasone-Induced Muscle Atrophy. BioMed Research International. 2014. Vol. 2014, no. 2014, pp.1-13.
https://search.emarefa.net/detail/BIM-511680
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-511680