Acute effect of electroacupuncture at the Zusanli acupoints on decreasing insulin resistance as shown by lowering plasma free fatty acid levels in steroid-background male rats

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• 作者：Rong-Tsung Lin (1)
  Chung-Yuh Tzeng (2)
  Yu-Chen Lee (3)
  Wai-Jane Ho (4)
  Juei-Tang Cheng (5)
  Jaung-Geng Lin (6)
  Shih-Liang Chang (4) (7)
  
• 刊名：BMC Complementary and Alternative Medicine
• 出版年：2009
• 出版时间：December 2009
• 年：2009
• 卷：9
• 期：1
• 全文大小：1008KB
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  34. The pre-publication history for this paper can be accessed here:http://www.biomedcentral.com/1472-6882/9/26/prepub
  
• 作者单位：Rong-Tsung Lin (1)
  Chung-Yuh Tzeng (2)
  Yu-Chen Lee (3)
  Wai-Jane Ho (4)
  Juei-Tang Cheng (5)
  Jaung-Geng Lin (6)
  Shih-Liang Chang (4) (7)
  
  1. Department of Internal Medicine, Division of Endocrinology and Metabolism, Tungs' Taichung Metro Harbor Hospital, Taichung County, Taiwan, Republic of China
  2. Department of Orthopedics, Taichung Veterans General Hospital, Taichung City, Taiwan, Republic of China
  3. Department of Acupuncture, China Medical University Hospital, Taichung City, Taiwan, Republic of China
  4. Department of Medicinal Botanicals and Health Care, Da-Yeh University, Chunghwa County, Taiwan, Republic of China
  5. Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan City, Taiwan, Republic of China
  6. Graduate Institute of Chinese Medical Science, China Medical University, Taichung City, Taiwan, Republic of China
  7. School of Chinese Medical Science, China Medical University, Taichung City, Taiwan, Republic of China
  

文摘

Background Insulin sensitivity has been enhanced by electroacupuncture (EA) in rats, but the EA phenomenon in an insulin resistant state is still unclear. This study reports the use of a large dose of prednisolone to evaluate the effects of EA in a state of insulin resistance. Methods The plasma levels of free fatty acids (FFAs) were estimated in steroid-background rats (SBRs) and compared with those in healthy rats treated with normal saline. In addition, plasma glucose and endogenous insulin levels were assayed to calculate the homeostasis model assessment (HOMA) index. Intravenous glucose tolerance test (IVGTT) was carried out to compare glucose tolerance. The SBRs were randomly divided into EA-treatment and non-EA treatment groups and 15-Hz EA was applied to the bilateral Zusanli acupoints to investigate its effects on insulin resistance. In addition to an insulin challenge test (ICT) and IVGTT, the plasma levels of FFAs were measured and western blot was performed to help determine the effects of EA on the insulin resistant state. Results The plasma levels of FFAs increased markedly in SBRs, the HOMA index was markedly higher, and glucose tolerance was impaired. EA improved glucose tolerance and insulin sensitivity by decreasing the plasma levels of FFAs. Further, the insulin signaling proteins (IRS1) and glucose transporter isoform protein (GLUT4) in skeletal muscle inhibited by prednisolone recovered after EA. Conclusion Insulin resistance was successfully induced by a large dose of prednisolone in male rats. This insulin resistance can be improved by 15 Hz EA at the bilateral Zusanli acupoints, as shown by decreased plasma levels of FFAs.