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| Content Provider | Springer Nature Link |
|---|---|
| Author | Wu, Ye Tan, Xiutao Tian, Jue Liu, Xin Wang, Yehong Zhao, Huanxin Yan, Zi Liu, Huirong Ma, Xinliang |
| Copyright Year | 2015 |
| Abstract | Hypercholesterolemia can increase the risk of cardiac injury, but the underlying mechanisms are not fully understood. The present study aimed to determine whether changes in the fluidity of the cardiomyocyte membrane may contribute to the increased susceptibility to myocardial ischemia/reperfusion (MI/R) injury observed in hypercholesterolemic rats. Male Wistar rats were fed a normal (n = 24) or high-cholesterol diet (n = 32) for 10 weeks. At the 6th week, the rats in the high-cholesterol diet group were treated with vehicle (n = 16, HC + V) or pioglitazone (n = 16, HC + PIO), a peroxisome proliferator-activated receptor-γ (PPARγ) agonist, and treatment lasted for the next 4 weeks. Rats in HC + V group displayed less membrane fluidity, a greater membrane cholesterol-to-phospholipid ratio (C/P), less Na$^{+}$–K$^{+}$-ATPase activity, and less cAMP content in their myocardial cells than rats fed a normal diet. A strong positive correlation was observed between membrane fluidity and cardiac injury, i.e., the myocardial infarct size when subjected to MI/R (30 min/24 h). Treatment with PIO restored much of the lost hypercholesterolemia-induced myocardial cell membrane fluidity, decreased membrane C/P ratio, increased Na$^{+}$–K$^{+}$-ATPase activity and cardiac cell cAMP content, improved cardiac function, and reduced the sizes of myocardial infarcts. Results demonstrated that hypercholesterolemia-induced decreased myocardial cell membrane fluidity may contribute to the increased susceptibility to cardiac injury, and PPARγ agonists may have therapeutic value in patients with hypercholesterolemia. |
| Starting Page | 25 |
| Ending Page | 34 |
| Page Count | 10 |
| File Format | |
| ISSN | 15307905 |
| Journal | Cardiovascular Toxicology |
| Volume Number | 17 |
| Issue Number | 1 |
| e-ISSN | 15590259 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2015-12-17 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Cell membrane fluidity Cardiac injury Hypercholesterolemia Pioglitazone Pharmacology/Toxicology Cardiology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Molecular Biology Toxicology Cardiology and Cardiovascular Medicine |
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