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3 results on '"Yunwook Kim"'

1. Effects of Resistance Exercise and Fermented Soybean Intake on Protein Expression Markers Related to Browning of White Adipose Tissue in Diet-induced Obese Rats

Author

Yunwook Kim, Gyuho Lee, Jaewoo Yoon, and Kijin Kim

Subjects
obesity, resistance exercise, fermented soybean, browning, protein expression, Nutrition. Foods and food supply, TX341-641, Biochemistry, QD415-436
Abstract

PURPOSE This study aimed to analyze the combined treatment effect of fermented soybean intake (for additional protein intake) and resistance exercise (for muscle metabolism activation) on the molecular biological response index of white adipose tissue (WAT) browning. METHODS The study included twenty 50-week-old male Wistar rats, who were made obese by being fed a high-fat diet for 8 weeks and then were randomly divided into four groups, control (Con), fermented soybean intake (Soy), resistance exercise (RT), and fermented soybean intake and resistance exercise combination (Soy+RT). After 12 weeks of Soy and RT treatment, body composition, and protein expression patterns such as peroxisome proliferator-activated receptor γ coactivator 1-α (PGC-1α), fibronectin type III domain-containing protein 5 (FNDC5), interleukin-6 (IL-6), and uncoupling protein-1 (UCP1) were compared in extensor digitorum longus and retroperitoneal fat. RESULTS The obese rats demonstrated a reduction in body weight and body fat mass, as well as maintenance of lean mass. Interestingly, the groups treated with Soy, RT, and Soy+RT displayed enhanced protein expression of PGC-1α, FNDC5, UCP1, and IL-6 in the extensor digitorum longus and retroperitoneal fat tissue than Con. In particular, the Soy+RT group displayed the most remarkable activation of the aforementioned protein levels in the muscle and adipose tissues. CONCLUSION This study concluded that resistance exercise and fermented soybean intake can partly contribute to the browning of WAT.

Published
2023
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2. Effects of an Exercise Program Combining Aerobic and Resistance Training on Protein Expressions of Neurotrophic Factors in Obese Rats Injected with Beta-Amyloid

Author

Gyuho Lee, Yunwook Kim, Jung-Hee Jang, Chan Lee, Jaewoo Yoon, Nayoung Ahn, and Kijin Kim

Subjects
Rats, Sprague-Dawley, Amyloid beta-Peptides, Brain-Derived Neurotrophic Factor, Physical Conditioning, Animal, Health, Toxicology and Mutagenesis, Public Health, Environmental and Occupational Health, Animals, Humans, β-amyloid, obesity, exercise, BDNF, brain function, Resistance Training, Obesity, Fibronectins, Rats
Abstract

In this study, the effects of a 12-week exercise program combining aerobic and resistance training on high-fat diet-induced obese Sprague Dawley (SD) rats after the injection of beta-amyloid into the cerebral ventricle were investigated. Changes in physical fitness, cognitive function, blood levels of beta-amyloid and metabolic factors, and protein expressions of neurotrophic factors related to brain function such as BDNF (brain-derived neurotrophic factor) in the quadriceps femoris, hippocampus, and cerebral cortex were analyzed. The subjects were thirty-two 10-week-old SD rats (DBL Co., Ltd., Seoul, Korea). The rats were randomized into four groups: β-Non-Ex group (n = 8) with induced obesity and βA25-35 injection into the cerebral ventricle through stereotactic biopsy; β-Ex group (n = 8) with induced obesity, βA25-35 injection, and exercise; S-Non-Ex group (n = 8) with an injection of saline in lieu of βA25-35 as the control; and S-Ex group (n = 8) with saline injection and exercise. The 12-week exercise program combined aerobic training and resistance training. As for protein expressions of the factors related to brain function, the combined exercise program was shown to have a clear effect on activating the following factors: PGC-1α (peroxisome proliferator-activated receptor gamma coactivator 1-alpha), FNDC5 (fibronectin type III domain-containing protein 5), and BDNF in the quadriceps femoris; TrkB (Tropomyosin receptor kinase B), FNDC5, and BDNF in the hippocampus; PGC-1α, FNDC5, and BDNF in the cerebral cortex. The protein expression of β-amyloid in the cerebral cortex was significantly lower in the β-Ex group than in the β-Non-Ex group (p < 0.05). The 12-week intervention with the combined exercise program of aerobic and resistance training was shown to improve cardiopulmonary function, muscular endurance, and short-term memory. The results demonstrate a set of positive effects of the combined exercise program, which were presumed to have arisen mainly due to its alleviating effect on β-amyloid plaques, the main cause of reduced brain function, as well as the promotion of protein expressions of PGC-1α, FNDC5, and BDNF in the quadriceps femoris, hippocampus, and cerebral cortex.

Published
2022
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