Preliminary adipose removal did not prevent diet-induced metabolic disorders in mice.
10.1097/CM9.0000000000001334
- Author:
Lin LIU
1
;
Chen-Xi LIANG
2
;
Xiao-Wei WANG
2
;
Ke-Xin PEI
3
;
Xin-Di MA
2
;
Chun-Xi ZHANG
2
;
Jing-Hui DONG
4
;
Ming-Ming GAO
2
;
Jia-Wei LIAO
5
Author Information
1. Department of Biochemistry and Molecular Biology, College of Basic Medicine, Hebei University of Chinese Medicine, Shijiazhuang, Hebei 050200, China.
2. Laboratory of Lipid Metabolism, Institute of Basic Medicine, Hebei Medical University, Shijiazhuang, Hebei 050017, China.
3. Department of Cardiology, First Hospital of Hebei Medical University, Shijiazhuang, Hebei 050031, China.
4. Department of Physiology, Hebei Medical University, Shijiazhuang, Hebei 050017, China.
5. Department of Cardiology, Institute of Cardiovascular Diseases, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, China.
- Publication Type:Journal Article
- MeSH:
Adipose Tissue;
Animals;
Diet, High-Fat/adverse effects*;
Insulin Resistance;
Liver;
Male;
Mice;
Mice, Inbred C57BL;
Obesity;
Subcutaneous Fat
- From:
Chinese Medical Journal
2021;134(6):716-724
- CountryChina
- Language:English
-
Abstract:
BACKGROUND:Obesity is a fundamental factor in metabolic disorders such as hyperlipidemia, insulin resistance, fatty liver, and atherosclerosis. However, effective preventive measures are still lacking. This study aimed to investigate different surgical protocols for removing partial adipose tissue before the onset of obesity and determine whether, and by which protocol, preliminary adipose removal could exert potent preventive effects against diet-induced metabolic disorders.
METHODS:Male low-density lipoprotein receptor (LDL-R) knockout (KO) mice were randomly divided into four groups and subjected to epididymal fat removal (Epi-FR) surgery, subcutaneous fat removal (suQ-FR) surgery, both subcutaneous and epididymal fat removal (Epi + suQ-FR) surgery, or sham-operation. After 1 week of recovery, all mice were given a high-fat diet (HFD) for 10 weeks to induce metabolic disorders.
RESULTS:In the Epi-FR group and the sham-operated group, the mean numbers of the residual subcutaneous fat were 28.59 mg/g and 18.56 mg/g, respectively. The expression of relative genes such as Pparg, Cebpa, Dgat2, Fabp4 and Cd36 in the residual subcutaneous fat increased 2.62, 3.90, 3.11, 2.06, 1.78 times in the Epi-FR group compared with that in the sham-operated group. Whereas in the other fat-removal groups, the residual fat depots had no significant change in either size or gene expression, as compared with those of the sham-operated group. Plasma lipid and glucose levels and insulin sensitivity, as detected by the glucose tolerance test, were not significantly alleviated in the three fat removal groups. Liver mass or lipid content was not attenuated in any of the three fat removal groups. The atherosclerosis burdens in the entire inner aorta and aortic root did not decrease in any of the three fat removal groups.
CONCLUSIONS:Our data suggest that removal of epididymal adipose or subcutaneous adipose alone or in combination before the onset of obesity did not protect against hyperlipidemia, insulin resistance, fatty liver, or atherosclerosis in LDL-R KO mice fed with a HFD. Hence, adipose removal possibly does not represent a potential approach in preventing obesity-related metabolic disorders in the obesity-susceptible population.
