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Docosahexaenoic Acid Protects Muscle Cells from Palmitate-Induced Atrophy
Joint Authors
Bryner, Randall W.
Woodworth-Hobbs, Myra E.
Williamson, David L.
Alway, Stephen E.
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-11-01
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Nutrition & Dietetics
Medicine
Abstract EN
Background.
Accumulation of free fatty acids leads to lipid-toxicity-associated skeletal muscle atrophy.
Palmitate treatment reduces myoblast and myotube growth and causes apoptosis in vitro.
It is not known if omega-3 fatty acids will protect muscle cells against palmitate toxicity.
Therefore, we examined the effects of docosahexaenoic acid (DHA) on skeletal muscle growth.
Methods.
Mouse myoblasts (C2C12) were differentiated to myotubes, and then treated with 0 or 0.5 mM palmitic acid or 0 or 0.1 mM DHA.
Results.
Intramyocellular lipid was increased in palmitate-treated cells but was prevented by DHA-palmitate cotreatment.
Total AMPK increased in DHA+ palmitate-treated compared to palmitate only cells.
RpS6 phosphorylation decreased after palmitate (−55%) and this was blunted by DHA+ palmitate (−35%) treatment.
Palmitate treatment decreased PGC1α protein expression by 69%, but was increased 165% with DHA+ palmitate (P=0.017) versus palmitate alone.
While palmitate induced 25% and 90% atrophy in myotubes (after 48 hours and 96 hours, resp.), DHA+ palmitate treatment caused myotube hypertrophy of ~50% and 100% after 48 and 96 hours, respectively.
Conclusion.
These data show that DHA is protective against palmitate-induced atrophy.
Although DHA did not activate the AMPK pathway, DHA treatment restored growth-signaling (i.e., rpS6) and rescued palmitate-induced muscle atrophy.
American Psychological Association (APA)
Bryner, Randall W.& Woodworth-Hobbs, Myra E.& Williamson, David L.& Alway, Stephen E.. 2012. Docosahexaenoic Acid Protects Muscle Cells from Palmitate-Induced Atrophy. ISRN Obesity،Vol. 2012, no. 2012, pp.1-14.
https://search.emarefa.net/detail/BIM-487931
Modern Language Association (MLA)
Bryner, Randall W.…[et al.]. Docosahexaenoic Acid Protects Muscle Cells from Palmitate-Induced Atrophy. ISRN Obesity No. 2012 (2012), pp.1-14.
https://search.emarefa.net/detail/BIM-487931
American Medical Association (AMA)
Bryner, Randall W.& Woodworth-Hobbs, Myra E.& Williamson, David L.& Alway, Stephen E.. Docosahexaenoic Acid Protects Muscle Cells from Palmitate-Induced Atrophy. ISRN Obesity. 2012. Vol. 2012, no. 2012, pp.1-14.
https://search.emarefa.net/detail/BIM-487931
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-487931