| Title |
AMPK Prevents Palmitic Acid‐Induced Apoptosis and Lipid Accumulation in Cardiomyocytes
|
|---|---|
| Published in |
Lipids, August 2017
|
| DOI | 10.1007/s11745-017-4285-7 |
| Pubmed ID | |
| Authors |
Lucas Adrian, Matthias Lenski, Klaus Tödter, Jörg Heeren, Michael Böhm, Ulrich Laufs |
| Abstract |
Palmitic acid, a main fatty acid (FA) in human nutrition, can induce apoptosis of cardiomyocytes. However, a specific combination of palmitic, myristic and palmitoleic acid (CoFA) has been reported to promote beneficial cardiac growth. The aim of this study was to investigate the relevance of CoFA for cardiac growth and to delineate the underlying signaling pathways of CoFA and palmitic acid treatment. CoFA treatment of C57Bl/6 mice increased FA serum concentrations. However, morphologic and echocardiographic analysis did not show myocardial hypertrophy. Cell culture studies using rat ventricular cardiomyocytes revealed an increased phosphorylation of AMP activated protein kinase α (AMPKα) to 155 ± 19% and its target acetyl-CoA-carboxylase to 177 ± 23% by CoFA. Treatment with myristic acid also increased AMPKα phosphorylation to 189 ± 32%. Palmitic acid did not activate AMPKα but increased expression of the FA translocase CD36 (FAT/CD36) to 163 ± 23% and adipose-differentiation-related-protein (ADRP), a sensitive marker of lipid accumulation, to 168 ± 42%. This was associated with an increased phosphorylation of the stress-activated-protein-kinase/Jun-amino-terminal-kinase (SAPK/JNK) to 173 ± 27%. In CoFA-treated cells, phosphorylation of SAPK/JNK was unaltered. FACS analysis revealed increased apoptosis to 159 ± 5% by palmitic acid but not by CoFA. AMPK activator AICAR (5-aminoimidazole-4-carboxamide ribonucleotide) prevented up-regulation of ADRP and increased apoptosis by palmitic acid. Confirming these findings, inhibition of AMPK by compound C in CoFA-treated cardiomyocytes resulted in an increased expression of ADRP to 154 ± 27%, FAT/CD36 to 167 ± 28% and apoptosis to 183 ± 12%. These data reveal that AMPK activation plays an important role in prevention of palmitic acid-induced apoptosis and lipid accumulation in cardiomyocytes. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 17 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 17 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 4 | 24% |
| Student > Master | 4 | 24% |
| Other | 1 | 6% |
| Researcher | 1 | 6% |
| Unknown | 7 | 41% |
| Readers by discipline | Count | As % |
|---|---|---|
| Biochemistry, Genetics and Molecular Biology | 4 | 24% |
| Agricultural and Biological Sciences | 2 | 12% |
| Business, Management and Accounting | 1 | 6% |
| Sports and Recreations | 1 | 6% |
| Medicine and Dentistry | 1 | 6% |
| Other | 0 | 0% |
| Unknown | 8 | 47% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 10 November 2017.
All research outputs
#19,907,825
of 24,464,848 outputs
Outputs from Lipids
#1,703
of 1,956 outputs
Outputs of similar age
#249,779
of 322,156 outputs
Outputs of similar age from Lipids
#11
of 16 outputs
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