Circadian Changes in Core Body Temperature, Metabolic Rate and Locomotor Activity in Rats on a High-Protein, Carbohydrate-Free Diet

Yamaoka, Ippei; Hagi, Mieko; Doi, Masako

doi:10.3177/jnsv.55.511

Cited by 8 publications

(7 citation statements)

References 22 publications

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“…Rectal temperatures were greater in control ewes fed high CP compared with low CP for most of the first 6 h after saline bolus. Furthermore, rectal temperatures in all ewes fed high CP were generally greater than those fed low CP before LPS bolus, indicating greater CP concentration in the diet increased metabolic heat production as previously shown in rats (Yamaoka et al, 2009). Ahmed and Abdellatif (1995) found similar effects of dietary CP on body temperature in unchallenged desert sheep.…”

Section: Discussionsupporting

confidence: 75%

Effects of bacterial lipopolysaccharide injection on white blood cell counts, hematological variables, and serum glucose, insulin, and cortisol concentrations in ewes fed low- or high-protein diets1

Yates

Löest

Ross

et al. 2011

Journal of Animal Science

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Bacterial lipopolysaccharide endotoxins (LPS) elicit inflammatory responses reflective of acute bacterial infection. We determine if feeding ewes high (15.5 %) or low (8.5 %) CP diets for 10 d altered inflammatory responses to an i.v. bolus of 0 (control), 0.75 (L75), or 1.50 (L150) μg LPS/kg BW in a 2 × 3 factorial (n = 5/treatment). Rectal temperatures, heart and respiratory rates, blood leukocyte concentrations, and serum cortisol, insulin, and glucose concentrations were measured for 24 h after an LPS bolus (bolus = 0 h). In general, rectal temperatures were greater (P ≤ 0.05) in control ewes fed high CP, but LPS increased (P ≤ 0.05) rectal temperature in a dose-dependent manner at most times between 2 and 24 h after bolus. Peak rectal temperature in L75 and L150 occurred 4 h after bolus. A monophasic, dose-independent rise (P ≤ 0.023) in serum cortisol occurred from 0.5 to 24 h after bolus, with peak cortisol at 4 h. Serum insulin was increased (P ≤ 0.016) by LPS in a dose-dependent manner from 4 to 24 h after bolus. Insulin did not differ between control ewes fed high and low CP diets but was greater (P < 0.001) in L75 ewes fed low compared with high CP and in L150 ewes fed high compared with low CP. Elevated insulin was not preceded by elevated serum glucose. Total white blood cell concentrations were not affected (P ≥ 0.135) by LPS, but neutrophil and monocyte fractions of white blood cells were increased (P ≤ 0.047) by LPS at 12 and 24 h and at 24 h after bolus, respectively, and lymphocyte fraction was increased (P = 0.037) at 2 h and decreased (P ≤ 0.006) at 12 and 24 h after bolus. Red blood cell and hemoglobin concentrations and hematocrit (%) were elevated (P ≤ 0.022) by LPS at 2 and 4 h after bolus. Rectal temperatures and serum glucose were greater (P ≤ 0.033) in ewes fed a high CP diet before LPS injection, but these effects were lost at and within 2.5 h of bolus, respectively. Feeding high CP diets for 10 d did not reduce inflammation in ewes during the first 24 h after LPS exposure but may benefit livestock by preventing acute insulin resistance when endotoxin exposure is mild.

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Section: Discussionsupporting

confidence: 75%

Effects of bacterial lipopolysaccharide injection on white blood cell counts, hematological variables, and serum glucose, insulin, and cortisol concentrations in ewes fed low- or high-protein diets1

Yates

Löest

Ross

et al. 2011

Journal of Animal Science

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“…Yamaoka et al 30 found that male Sprague-Dawley rats fed a highprotein, carbohydrate-free diet decreased locomotor activity but had increased body temperature and reduced body weight when compared to male rats fed with a normal-protein diet. Differently, Oishi et al 31 found no differences on locomotor activity and body temperature in mice receiving a low-carbohydrate high-protein diet.…”

Section: High-protein Dietmentioning

confidence: 99%

Translational Science: How experimental research has contributed to the understanding of spontaneous Physical Activity and Energy Homeostasis

Benfato

Moretto

Barthichoto

et al. 2017

Motriz: rev. educ. fis.

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-Spontaneous physical activity (SPA) consists of all daily living activities other than volitional exercise (e.g. sports and fitness-related activities). SPA is an important component of energy expenditure and may protect from overweight and obesity. Little is known about the biological regulation of SPA, but animal research has contributed significantly to expand our knowledge in this field. Studies in rodents have shown that SPA is influenced by nutrients and volitional exercise. High-fat diet seems to decrease SPA, which contributes to weigh gain. Volitional exercise may also reduce SPA, helping to explain the commonly reported low efficiency of exercise to cause weight loss, and highlighting the need to find a volume/intensity of exercise to maximize total daily energy expenditure. Animal studies have also allowed for the identification of some brain areas and chemical mediators involved in SPA regulation. These discoveries could enable the development of new therapeutics aiming to enhance SPA.

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“…The effects of dietary protein levels on body weight, food intake, and food efficiency have differed depending on the protein level, the subjects' age and sex, and the experimental period (15)(16)(17)(18)(19).…”

Section: Body Weight Gain Total Food Intake and Food Efficiencymentioning

confidence: 99%

“…body weight gain in rats (18,19). The 30% casein level used in the present study is not high enough to reduce body weight, although food intake decreases at this level.…”

mentioning

confidence: 99%

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Effect of Dietary Protein Levels on Protein Nutritional Status in Growing Female Rats Kept under Constant Darkness

Hanai

Yoshikuni

Hikita

2017

J Nutr Sci Vitaminol

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SummaryThe purpose of this study was to clarify the effects of dietary protein levels on protein nutritional status in rats kept under constant darkness. Thirty-six 4-wk-old female rats (F344 strain) were divided into six groups. Each group was given a diet with one of three different protein levels and kept under normal light and dark cycles (7:00-19:00 light period/19:00-7:00 dark period, N group) or under constant darkness (D group) for 4 wk. The protein levels of the diets were 10%, 20%, and 30% casein. The six groups are referred to as the N10%, N20%, N30%, D10%, D20%, and D30% groups. Body weight gain was low in the D groups, and that in the D30% group was much lower than that in the N30% group. The D30% group retained less nitrogen than the N30% group. As for the amount of urinary nitrogen excreted every 4 h, the values for the D-groups were higher than those for the N-groups in the 11:00-15:00 periods, and that for the D30% group was higher than that for the N30% group in the 15:00-19:00 periods, which means that protein catabolism was higher in the D30% group. It was shown that when rats kept under constant darkness were fed a high-protein diet for 4 wk, their nitrogen retention decreased and their protein nutritional state dropped.

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Circadian Changes in Core Body Temperature, Metabolic Rate and Locomotor Activity in Rats on a High-Protein, Carbohydrate-Free Diet

Cited by 8 publications

References 22 publications

Effects of bacterial lipopolysaccharide injection on white blood cell counts, hematological variables, and serum glucose, insulin, and cortisol concentrations in ewes fed low- or high-protein diets1

Effects of bacterial lipopolysaccharide injection on white blood cell counts, hematological variables, and serum glucose, insulin, and cortisol concentrations in ewes fed low- or high-protein diets1

Translational Science: How experimental research has contributed to the understanding of spontaneous Physical Activity and Energy Homeostasis

Effect of Dietary Protein Levels on Protein Nutritional Status in Growing Female Rats Kept under Constant Darkness

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