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Abstract Title:

[The study of insulin resistance and leptin resistance on the model of simplicity obesity rats by curcumin].

Abstract Source:

J Atheroscler Thromb. 2009;16(6):870-7. Epub 2009 Dec 22. PMID: 19176142

Abstract Author(s):

Yan Yu, Sen-ke Hu, Hong Yan

Article Affiliation:

Department of Public Health, Xi'an Jiaotong University School of Medicine, Xi'an 710061, China.

Abstract:

OBJECTIVE: To evaluate the insulin and leptin resistance of curcumin on simplicity obesity rats.

METHODS: All 50 SPF grade healthy Sprague-Dawley male initial weaning rats were used for two groups in stratified sampling by weight: 30 in treated group and 20 in control group. They were assigned to the following treatment for 8 weeks: the treated group was fed with high-fat food and the control group was fed with normal food. Eight weeks later, adiposity model rats were prepared. Groups: adiposity model rats were divided into 3 groups: model + low curcumin (1.25 g/kg), model + high curcumin (5.00 g/kg) and a model group. In addition, there also had a normal control and a control + high curcumin (5.00 g/kg) group. Ten rats in every group and all given ground feed. After intragastric administration in different doses of curcumin 4 weeks, the effects and pathological changes were observed by the blood sugar, insulin, leptin and TNF-alpha, pathology and transmission electron microscope of pancreatic gland.

RESULTS: Given 4 weeks the different dose of curcumin on the simplicity obesity rats, the significant diminished weight (435.0 +/- 37.6) g and content of lipocyte (4.78 +/- 1.87) g as compared with the obesity model control (492.3 +/- 14.8) g and (8.94 +/- 1.88) g (t values were 4.484 and 4.961 respectively, P<0.01), level of blood sugar (4.50 +/- 0.09) mmol/L, insulin (7.43 +/- 0.65) mmol/L, leptin (3.40 +/- 0.39) mmol/L and TNF-alpha (2.42 +/- 0.19) ng/ml were significantly decreased than those of adiposity model rats (4.94 +/- 0.12) mmol/L, (9.30 +/- 0.21) mmol/L, (4.40 +/- 0.23) mmol/L and (2.86 +/- 0.49) ng/ml (t values were 8.297, 7.743, 6.247 and 2.368 respectively, P<0.05), and there was no significant difference with the control group (4.30 +/- 0.14) mmol/L on the level of blood sugar (t = 0.399, P>0.05). There were a lot of secretory granules with large sphere volume in beta cells of pancreatic island found by transmission electron microscope, and these secretory granules had a higher electron density than those in non-disposed groups.

CONCLUSION: By diminishing the sediment of fat, relaxing the lymphatic return, and refraining the apoptosis of beta cells, the curcumin might significantly decrease the level of insulin resistance and leptin resistance caused by the high fat diet.

Study Type : Animal Study

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Sayer Ji
Founder of GreenMedInfo.com

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