Effect of Starvation on the Circadian Adrenocortical Rhythm in Rats

Kobayashi, Hideo; Saito, Masayuki; Suda, Masami

doi:10.1210/endo-106-3-918

Cited by 68 publications

(22 citation statements)

References 11 publications

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“…During the past decade the role of timing of food provision as an entrainer has been proposed for laboratory rodents. This is based on the findings that in rats (3)(4)(5) and mice (6) the phase of the plasma corticosterone rhythm shifts when the feeding time is changed and that the peak of the corticosterone level appeared just before the feeding time regardless of lighting conditions. In human subjects, however, such a synchronizing role of meal intake is controversial.…”

Section: Discussionmentioning

confidence: 99%

Modifications of circadian cortisol rhythm by cyclic and continuous total enteral nutrition.

Saito

Nishimura

Kobayashi

1989

Journal of Nutritional Science and Vitaminology, J Nutr Sci Vit

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SummaryTo clarify the relationship between the pattern of diet intake and the circadian adrenocortical rhythm, we measured plasma cortisol levels at 4-h intervals over a 24-h period in 18 patients who were in the vegetative state and had been receiving total enteral nutrition (TEN) for 4 weeks. One group of 6 patients was given a liquid diet intraduodenally and continuously throughout a day (continuous TEN), whereas the two other groups received their daily enteral feeding during a restricted time of day, either in the daytime from 0800h to 2000h (diurnal TEN, 6 patients) or in the nighttime from 2000h to 0800h (nocturnal TEN, 6 patients). In patients with diurnal TEN, there was a clear cortisol rhythm with a peak at 0800h, whose pattern was quite similar to the well-established cortisol rhythm in normal subjects. Patients with nocturnal TEN also showed a cortisol rhythm, but the peak appeared at 1600h. There was no appreciable difference in the amplitude of the rhythm between the two groups. Patients with continuous TEN did not show any consistent circadian cortisol rhythms. Plasma levels of glucose, insulin, and free fatty acids also showed circadian fluctuations corresponding to the pattern of diet infusion in the groups with diurnal and nocturnal TEN, and remained almost constant throughout a day in the group with continuous TEN. We conclude from these results that the timing of diet intake may have a synchronizing effect on the circadian cortisol rhythm in man, as it does in laboratory animals.

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Section: Discussionmentioning

confidence: 99%

Modifications of circadian cortisol rhythm by cyclic and continuous total enteral nutrition.

Saito

Nishimura

Kobayashi

1989

Journal of Nutritional Science and Vitaminology, J Nutr Sci Vit

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“…This is also true of the effects of feeding rhythms (Johnson and Levine, 1973 ;Krieger, 1974 ;Moberg et al, 1975 ;Krieger et al, 1977 ;Obled et al, 1977 ;Takahashi et al, 1977 ;Morimoto et al, 1979 ;Itoh et al, 1980 ;Kato et al, 1980 ;Miyabo et al, 1980). Periodic food distribution has often been utilized in rats as a biological entrainer.…”

mentioning

confidence: 99%

Influence of photoperiod on the time of birth in the rat. IV. Effects of an imposed feeding rhythm

Bosc¹,

Nicolle²

1985

Reprod. Nutr. Dévelop.

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“…Glucocorticoid and thyroid hormone are known to be protein catabolic hormones (28). It was reported that the secretion of glucocorticoid was high in the early stage of the active period, and this secretion rhythm was changed by changes in the food intake rhythm (29). The present study could not measure the rhythm of hormone secretion.…”

Section: Nitrogen Balancementioning

confidence: 57%

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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Effect of Starvation on the Circadian Adrenocortical Rhythm in Rats

Cited by 68 publications

References 11 publications

Modifications of circadian cortisol rhythm by cyclic and continuous total enteral nutrition.

Modifications of circadian cortisol rhythm by cyclic and continuous total enteral nutrition.

Influence of photoperiod on the time of birth in the rat. IV. Effects of an imposed feeding rhythm

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

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