Publications by authors named "Jae Cheol Kim"

Background/objectives: The proliferation of appearance-centered values on social media has driven non-obese adolescents towards increasingly extreme diets and exercise programs to achieve weight loss. Despite this, the effects of concurrent diets and exercise on musculoskeletal development during adolescence are unclear. This study examined whether prolonged endurance exercise (EX) with intermittent fasting during adolescence adversely affects musculoskeletal growth.

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Post-weaning diarrhea (PWD) remains a major problem for some pork producers, exacerbated by restrictions or bans on the use of antimicrobial compounds. Acetylated high-amylose maize starch (HAMSA) delivers acetate to the large bowel and may reduce the severity of enteric infections, including those caused by Escherichia coli (E. coli).

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Background: Long-term exercise is recognized as one of the most effective means of maintaining health after aging, but the relationship between moderate exercise and health in the older population is often overlooked.

Objective: The present study was conducted to investigate the effects of excessive endurance exercise on the old mice musculoskeletal system.

Results: The 8 weeks of normal endurance exercise significantly improved skeletal muscle mitochondrial biogenesis and increased femoral osteogenesis in young and old mice.

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Article Synopsis
  • The study examined how endurance exercise training (EXT) can help mitigate health risks associated with disrupted circadian rhythms (CR) in both shift workers and experimentally affected rats.
  • Researchers found that CR disturbance leads to negative changes in skeletal muscle, including increased dyslipidemia and decreased mitochondrial functioning.
  • Results indicated that EXT can improve cholesterol levels and enhance mitochondrial biogenesis and antioxidant defenses, suggesting it may help lower cardiovascular risks associated with CR disruptions.
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Article Synopsis
  • Flavonoids are antioxidants that may enhance athletic performance by affecting various physiological processes, but existing research shows mixed results regarding their effectiveness.
  • A systematic review and meta-analysis of 22 studies were conducted to evaluate the impact of flavonoid supplementation on athletic performance in healthy adults, examining different types of training and measurement outcomes.
  • The analysis revealed that flavonoid supplementation generally improved performance in tests and exercise tolerance, especially for non-athletes and those using long-term supplementation, while athletes showed less significant results potentially due to certain limitations in the studies.
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One of the most important strategies for successful aging is exercise. However, the effect of exercise can differ among individuals, even with exercise of the same type and intensity. Therefore, this study aims to confirm whether endurance training (ETR) has the same health-promoting effects on the musculoskeletal and hematopoietic systems regardless of age.

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Different cereal types, in combination with different protein sources, are fed to pigs after weaning, but their interactions and possible implications are not well researched. In this study, 84 male weaned piglets were used in a 21-day feeding trial to investigate the effects of feeding either medium-grain or long-grain extruded rice or wheat, in a factorial combination with protein sources of either vegetable or animal origin, on postweaning performance, shedding of β-haemolytic , and the coefficient of total tract apparent digestibility (CTTAD). Pigs fed either rice type performed the same ( > 0.

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Background: Human common salivary protein 1 (CSP1) is one of a variety of molecules in saliva but its function remains to be determined. The gold standard method for diagnosis of diabetes mellitus (DM) is to check levels of glucose or HbA1C in plasma or serum. The purpose of this study was to examine whether Salivary CSP1 concentration would be useful alternative for DM diagnosis.

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This study investigated whether the inclusion of a stimbiotic (STB) can improve performance, influence intestinal microbiota and fermentation activity, and reduce pro-inflammatory cytokines in piglets fed a low zinc oxide diet without antimicrobial growth promotors compared to fructo-oligosaccharide (FOS) and mannan-oligosaccharide (MOS) when housed either in good sanitary (GS) or poor sanitary (PS) environments. One hundred forty-four male pigs (28-day-old) were sorted by initial body weight (BW) and allocated to one of six experimental treatments: 1) GS environment without any additive (GS-CTR); 2) GS environment with 0.01% stimbiotic (GS-STB); 3) PS environment (without cleaning and disinfection of a previously populated room) without any additive (PS-CTR); 4) PS environment with 0.

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This study examines how the high-fat diet (HFD) affects mitochondrial dynamics and biogenesis, and also whether combining it with low-intensity endurance exercise adds to these effects. Six 8-week-old male Sprague-Dawley (SD) rats were put on control (CON; standard chow diet), HF (HFD intake), and HFEx (HFD + low-intensity treadmill exercise) for 6 weeks. As a result, no change in body weight was observed among the groups.

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The present study investigated the effects of supplementing a low protein (LP) diet supplemented with key essential amino acids (AA) to broilers on growth performance, intestinal tract function, blood metabolites, and nitrogen excretion when the animals were maintained under various sanitary conditions for 35 D after hatching. Three hundred eighty-four one-day-old male broilers (Ross 308) were randomly allotted to groups that received one of 6 dietary treatments in a 2 × 3 factorial arrangement (i.e.

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This study aimed to investigate the expression of PGC-1α/FNDC5/irisin induced by attenuation of high-fat diet (HFD)-induced bone accrual and determine whether swimming exercise could improve attenuating bone accrual through this mechanism. Eight-week-old Sprague-Dawley rats were divided into two groups for the first 8 weeks: CD, control diet (n = 10); and HFD, high-fat diet (n = 20). HFD-fed rats were again divided into two groups for further 8 weeks treatment: HFD (n = 10) and HFD with swimming exercise (HEx, n = 10).

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Background: This study investigated the validity of the DNA-marker based test to determine susceptibility to ETEC-F4 diarrhoea by comparing the results of two DNA sequencing techniques in weaner pigs following experimental infection with F4 enterotoxigenic (ETEC-F4). The effects of diet and genetic susceptibility were assessed by measuring the incidence of piglet post-weaning diarrhoea (PWD), faecal shedding and the diarrhoea index.

Results: A DNA marker-based test targeting the mucin 4 gene () that encodes F4 fimbria receptor identified pigs as either fully susceptible (SS), partially or mildly susceptible (SR), and resistant (RR) to developing ETEC-F4 diarrhoea.

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An optimally functioning gastrointestinal tract (GIT) clearly is of importance to the overall metabolism, physiology, disease status and performance of pigs of all stages of growth and development. Recently, the 'health' of the GIT ('gut health') has attracted much attention despite the lack of a clear definition to the term or its aetiology, although in broad terms, 'gut health' encompasses a number of physiological and functional features including nutrient digestion and absorption, host metabolism and energy generation, a stable and appropriate microbiota/microbiome, defence mechanisms including barrier function and mucosal immune mechanisms, and the interactions between these components. 'Gut health' in the newly-weaned (young) pig is of obvious interest due to changes in GIT structure and function associated with the post-weaning transition, and more recently to the upsurge in interest in different feed additives as dietary alternatives/replacements caused by bans/reductions in certain antimicrobial compounds being available in some parts of the world.

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The objective of this study was to analyze the concurrent treatment effects of ursolic acid (UA) and low-intensity treadmill exercise and to confirm the effectiveness of UA as an exercise mimetic to safely improve muscle atrophy-related diseases using Sprague-Dawley (SD) rats with skeletal muscle atrophy. Significant muscle atrophy was induced in male SD rats through hind limb immobilization using casting for 10 days. The muscle atrophy-induced SD rats were group into four: SED, sedentary; UA, daily intraperitoneal UA injection, 5 mg/kg; EX, low-intensity (10-12 m/min, 0° grade) treadmill exercise; and UEX, daily intraperitoneal UA injection, 5 mg/kg, and low-intensity (10-12 m/min, 0° grade) treadmill exercise.

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Cytotoxicity assays with patient peripheral blood mononuclear cell (PBMC)-derived natural killer (NK) cells are useful in evaluating the innate immunity of patients with cancer. However, the size of the NK cell population in PBMC preparations may have significant effects on the assay outcome. Therefore, the present study examined the effect of NK cell frequency in a cytotoxicity system to investigate NK cell immunity in post-surgical colorectal cancer patients.

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The objective of the present study was to analyze the activation and expression patterns of upstream and downstream factors of PGC-1α to determine whether antioxidant (AO) supplementation inhibits mitochondrial biogenesis in skeletal muscles as an adaptation to endurance training, as well as to analyze changes in endurance capacity based on such findings. For this objective, 24 male Sprague-Dawley (SD) rats were allocated into 4 groups (vehicle-sedentary, V-Sed; vehicle-exercise, V-EX; antioxidant-sedentary, AO-Sed; antioxidant-exercise, AO-EX) of 6 rats each. The rats were then treated with vitamin C (500 mgkg body weightd) or a placebo for 8 wk, and a swimming program was implemented in some rats during the last 4 wk of this period.

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Purpose: This study aimed to investigate the effect of swimming exercise on high-fat diet-induced low bone mineral density (BMD) and trabecular bone microstructure in rats.

Methods: Eight-week-old male Sprague- Dawley (SD) rats were divided into a normal diet group (n = 9) and a high-fat diet group (n = 15). Three rats in each group were sacrificed after 8 weeks of high-fat diet to evaluate the association between high-fat diet and bone health.

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Two hundred and ninety four pigs were used with the aim to develop a dietary management strategy using L. (albus lupins) to reduce the increase in feed intake and subsequent increase in carcass fatness in pigs immunized against gonadotrophin releasing factor (immunocastrates; IC males) and entire male pigs in the late finishing stage. From day (d) 0 to 28, IC males fed the control diet grew faster ( = 0.

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Two hundred and ninety-four pigs were used to assess the effect of two ingredients (Lupinus albus (albus lupins) or a combination of calcium chloride and sodium tri-polyphosphate (mineral salts)) on growth performance, body composition and objective meat quality of pigs immunized against gonadotrophin releasing factor (immunocastrates) and entire male pigs in the late finishing phase. Pigs fed mineral salts ate less feed than those fed the control diet with no effect on growth rate (p > 0.05), backfat (p > 0.

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Background: This experiment was conducted to test the hypothesis that vitamin E (Vit E) and acetylsalicylic acid (ASA), a cyclooxygenase-2 (COX-2) inhibitor, will additively reduce the production of the immunosuppressive molecule prostaglandin E (PGE) and hence reduce inflammatory responses in weaner pigs experimentally infected with an enterotoxigenic strain of .

Methods: The experiment was conducted in a research facility with 192 individually-housed male weaner pigs (Landrace × Large White) weighing 6.6 ± 0.

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Purpose: Exercise training with PPARγ agonist is expected to increase glucose uptake and improve insulin sensitivity in skeletal muscle of patients with diabetes. However, its mechanisms to effect glucose uptake and insulin sensitivity in skeletal muscle are unclear.

Methods: The mechanism of action was determined by co-treatment with PPARγ agonist- rosiglitazone and exercise training in streptozotocin induced-diabetic obese Zucker rats.

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The effects of feeding a diet supplemented with zinc oxide (ZnO) or a blend of organic acids, cinnamaldehyde and a permeabilizing complex (OACP) on post-weaning diarrhoea (PWD) and performance in pigs infected with enterotoxigenic E. coli (ETEC) were examined. Additionally, changes in selected bacterial populations and blood measures were assessed.

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