Diurnal patterns of food intake and plasma corticosterone levels in lactating rats

Tachi, Norihide; Tomogane, Hiroshi; Yokoyama, Akihiro

doi:10.1016/0031-9384(81)90335-8

Cited by 15 publications

(6 citation statements)

References 18 publications

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“…1; Tachi et al, 1981). From 20:00 to 08:00 h in the present study, virgin rats exhibited the bimodal feeding pattern previously reported in male rats (Siegel, 1961) and virgin females (Tachi et al, 1981). This has been assumed to represent two active periods of feeding separated by a period of satiety.…”

Section: Food Intakesupporting

confidence: 82%

“…1; Kimura et al, 1970;Bruckdorfer et al, 1974), whereas the lactating rats consumed 35% during the same period ( Fig. 1; Tachi et al, 1981). From 20:00 to 08:00 h in the present study, virgin rats exhibited the bimodal feeding pattern previously reported in male rats (Siegel, 1961) and virgin females (Tachi et al, 1981).…”

Section: Food Intakesupporting

confidence: 72%

“…This pattern is gradually lost post partum, until at peak lactation it has become a single peak ( Fig. 1; Tachi et al, 1981). Nevertheless, the profiles of the food intake in virgin and lactating rats were similar, and it is noteworthy that the marked diurnal variation at peak lactation is not obscured by the hyperphagia.…”

Section: Food Intakementioning

confidence: 82%

“…The dietary intake of the rat is increased by some 300% at peak lactation (Fell et al, 1963;Cripps & Williams, 1975), and it therefore might be expected that this hyperphagia would alter the feeding pattern of the lactating rat. There is evidence that the percentage of the daily food intake consumed during the light period is greater in lactating rats than in virgin rats (Tachi et al, 1981). Diurnal variations in the rate of lactose synthesis in mammary gland in vivo have been reported (Carrick & Kuhn, 1978), and this process appears to be sensitive to the amount of food consumed (Wilde & Kuhn, 1979).…”

mentioning

confidence: 99%

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Diurnal variations in food intake and in lipogenesis in mammary gland and liver of lactating rats

Munday¹,

Williamson²

1983

Biochemical Journal

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Despite the hyperphagia, the food intake of the lactating rat showed marked diurnal changes which paralleled those of virgin rats. The major difference was that lactating rats consumed a higher proportion (35%) of their diet during the light period than did virgin rats (14%). The peak rate of lipogenesis in the lactating mammary gland occurred around midnight, and this decreased by 67% to reach a nadir around mid-afternoon; this corresponded with the period of lowest food intake. The diurnal variations in hepatic lipogenesis in lactating rats were much less marked. The changes in hepatic glycogen over 24 h suggest that it acts to supply carbon for lipogenesis during the period of decreased food intake. The activation state of acetyl-CoA carboxylase in mammary gland altered during 24 h, but the changes did not always correlate with alterations in the rate of lipogenesis. The changes in plasma insulin concentration tended to parallel the food intake in the lactating rats, but they did not appear to be sufficient to explain the large alterations in lipogenic rate in the mammary gland.

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Section: Food Intakesupporting

confidence: 82%

Section: Food Intakesupporting

confidence: 72%

Section: Food Intakementioning

confidence: 82%

mentioning

confidence: 99%

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Diurnal variations in food intake and in lipogenesis in mammary gland and liver of lactating rats

Munday¹,

Williamson²

1983

Biochemical Journal

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“…Van der Schoot, Lankhorst, de Roo & de Greef (1978) reported the lack of a diurnal plasma prolactin rhythm in lactating rats. In contrast, we observed (Kacsóh & Nagy, 1983) circadian rhythms in plasma and hypophysial prolactin and in plasma cortico¬ sterone concentrations in freely behaving lactating rats, confirming the results of Tachi, Tomogane & Yokoyama(1981).…”

Section: Introductionsupporting

confidence: 74%

Episodic prolactin and growth hormone secretion not related to the actual suckling activity in lactating rats

Nagy¹,

Kacsóh²,

Halász³

1986

Journal of Endocrinology

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In order to characterize the secretion pattern of prolactin and GH in freely behaving lactating rats, frequent serial blood samples were collected through indwelling atrial cannulae and their prolactin and GH concentrations determined by radioimmunoassay. At the time of blood sampling, physical contact with the pups was recorded. Plasma prolactin and GH levels showed episodic changes which were independent of each other and there was no apparent correlation between hormone levels and contact between mother and pups. The data suggest that there are episodic fluctuations in plasma prolactin and GH concentrations in lactating rats. These changes do not appear to be closely correlated with the proximity of the mother to her pups.

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Effects of high fat, protein supplemented diets on maternal behavior in rats

Bertino

1982

Physiology & Behavior

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Diurnal patterns of food intake and plasma corticosterone levels in lactating rats

Cited by 15 publications

References 18 publications

Diurnal variations in food intake and in lipogenesis in mammary gland and liver of lactating rats

Diurnal variations in food intake and in lipogenesis in mammary gland and liver of lactating rats

Episodic prolactin and growth hormone secretion not related to the actual suckling activity in lactating rats

Effects of high fat, protein supplemented diets on maternal behavior in rats

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