Strength training results in reduced fat accumulation and improved blood lipid profile even in the absence of skeletal muscle hypertrophy in obese rats induced by high-fat diet

2018 ◽  
Author(s):  
Catarina Contreiro ◽  
Andressa Damiani ◽  
Leonardo Caldas ◽  
Breno Nogueira ◽  
Andre Leopoldo ◽  
...  
2018 ◽  
Vol 20 (1) ◽  
pp. 8 ◽  
Author(s):  
Rafael Sales ◽  
Priscylla Medeiros ◽  
Flavia Spreafico ◽  
Patrícia de Velasco ◽  
Fernanda Gonçalves ◽  
...  

Nonalcoholic fatty liver disease (NAFLD) is highly prevalent worldwide. The most severe form is nonalcoholic steatohepatitis (NASH). Among risk factors for the development of NAFLD is excessive lipid intake. Since palm (P) oil is the most consumed oil in the world, we aimed to investigate the effects of high-fat diets made with P oil, hybrid palm (HP) oil, or olive (O) oil in liver. Twenty-four male mice (C57Bl/6J) were fed a high-fat diet (41% fat) containing P, HP, or O oils for 8 weeks and compared to a control (C) group fed a chow diet. Adiposity was measured with computed tomography. Body, adipose tissue, and liver weights, as well as liver fat (Bligh–Dyer), blood lipid profile, glucose, and liver enzymes were measured. Liver histology (hematoxylin–eosin) and transcriptome (microarray-based) were performed. ANOVA tests with Newman–Keuls were used. Body weight was increased in the P group (p < 0.001) and body fat in the O group (C vs. O p ≤ 0.01, P vs. O p ≤ 0.05, HP vs. O p ≤ 0.05). All high-fat diets disturbed the blood lipid profile and glucose, with marked effects of HP on very low-density lipoprotein cholesterol (VLDL), triglycerides, and alkaline phosphatase (p ≤ 0.001). HP had the highest liver fat (42.76 ± 1.58), followed by P (33.94 ± 1.13). O had a fat amount comparable to C (16.46 ± 0.34, 14.71 ± 0.70, respectively). P and HP oils induced hepatocyte ballooning. Transcriptome alterations of the O group were related to amino acid metabolism and fatty acid (FA) metabolism, the P group to calcium ion homeostasis, and HP oil to protein localization. Both P and HP oils induced NASH in mice via disturbed hepatocyte transcription. This raises concerns about the content of these oils in several industrialized foods.


2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Catarina Denise Entringer Contreiro ◽  
Leonardo Carvalho Caldas ◽  
Breno Valentim Nogueira ◽  
André Soares Leopoldo ◽  
Ana Paula Lima-Leopoldo ◽  
...  

The aim was to investigate the effect of strength training on skeletal muscle morphology and metabolic adaptations in obese rats fed with unsaturated high-fat diet (HFD). The hypothesis was that strength training induces positive metabolic adaptations in obese rats despite impaired muscle hypertrophy. Male Wistar rats (n = 58) were randomized into two groups and fed a standard diet or a high-fat diet (HFD) containing 49.2% of fat. After induction and maintenance to obesity, the rats were divided into four groups: animals distributed in sedentary control (CS), control submitted to strength training protocol (CT), obese sedentary (ObS), and obese submitted to strength training protocol (ObT). The exercise protocol consisted of 10 weeks of training on a vertical ladder (three times a week) with a load attached to the animal’s tail. At the end of 10 weeks, strength training promoted positive changes in the body composition and metabolic parameters in obese animals. Specifically, ObT animals presented a reduction of 22.6% and 14.3% in body fat and adiposity index when compared to ObS, respectively. Furthermore, these rats had lower levels of triglycerides (ObT = 23.1 ± 9.5 vs. ObS = 30.4 ± 6.9 mg/dL) and leptin (ObT = 13.2 ± 7.2 vs. ObS = 20.5 ± 4.3 ng/mL). Training (ObT and CT) induced a greater strength gain when compared with the respective control groups. In addition, the weight of the flexor hallucis longus (FHL) muscle was higher in the ObT group than in the CT group, representing an increase of 26.1%. However, training did not promote hypertrophy as observed by a similar cross-sectional area of the FHL and plantar muscles. Based on these results, high-intensity strength training promoted an improvement of body composition and metabolic profile in obese rats that were fed a high-fat diet without skeletal muscle adaptations, becoming a relevant complementary strategy for the treatment of obesity.


2014 ◽  
Vol 94 (14) ◽  
pp. 2972-2977 ◽  
Author(s):  
Ganapathy Saravanan ◽  
Ponnusamy Ponmurugan ◽  
Machampalayam Arumugam Deepa ◽  
Balasubramanian Senthilkumar

BioFactors ◽  
2008 ◽  
Vol 33 (1) ◽  
pp. 49-60 ◽  
Author(s):  
Na-Hyung Kim ◽  
Hyung-Min Kim ◽  
Hyo-Jin An ◽  
Jae-Young Um ◽  
Phil-Dong Moon ◽  
...  

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Mengting Zhang ◽  
Yanfei Shao ◽  
Bizhen Gao ◽  
Jicheng Chen ◽  
Ping Zhang ◽  
...  

Erchen decoction (ECD) is a common treatment prescribed in traditional Chinese medicine (TCM) clinics, which has remarkable efficacy in the treatment of obesity, fatty liver, hyperlipidemia, diabetes, and other diseases caused by phlegm. In this study, we investigated the effect that ECD had on the lipid metabolism induced by high-fat diet in C57BL/6 mice. Body weight, body length, and abdominal circumference were detected. Blood lipid content was measured via biochemical assay kit. The gene and protein expression of PPARγ and LPL in visceral fat and skeletal muscle of mice was measured by real-time PCR and western blot. The research discovered that the phlegm-resolving effect that ECD had on high-fat diet mice was mainly manifested as reduced body weight, Lee’s index, abdominal circumference, and level of TG and TC. Meanwhile, we observed significantly increased PPARγ mRNA and protein level in visceral fat and PPARγ and LPL protein level in skeletal muscle in the ECD group. Contrarily, a decrease in PPARγ mRNA level in skeletal muscle in the ECD group was observed. Therefore, we speculate that ECD regulates the lipid metabolic disorder by decreasing the blood lipid level. Moreover, the potential molecular mechanism of ECD is to promote the expression of PPARγ in visceral fat and skeletal muscle and the expression of LPL in skeletal muscle.


Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 1748-P ◽  
Author(s):  
FENGYUAN HUANG ◽  
KEVIN YANG ◽  
KAMALAMMA SAJA ◽  
YICHENG HUANG ◽  
QINGQIANG LONG ◽  
...  

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