Physiologie de l'absorption intestinale du phosphore chez l'animal

Barlet, J.P.; Davicco, M.J.; Coxam, V.

doi:10.1051/rnd:19950502

Cited by 13 publications

(3 citation statements)

References 32 publications

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“…However, the increase of serum PTH concentration in response to the decrease of serum Ca (P otts et al 1968) may also be involved because PTH stimulates P i secretion in the saliva of sheep (C lark et al 1975; W right et al 1984; D ua et al 1995) and urine of sheep (B arlet and C are 1972) and cows (M ayer et al 1966, 1968). It is well established that the salivary route is the most important P i secretory pathway in ruminants (B reves and S chröder , 1991; C are 1994; B arlet et al 1995) whereby 1,25‐dihydroxyvitamin D (1,25‐(OH) 2 D) modulates this process in decreasing salivary P i (M anas ‐A lmendros et al 1982, R iad et al 1987). Large differences between studies in the proportion of P i secreted in urine may be explained by the dietary P i intake, the dietary Ca/P ratio and the physical nature of the diet which is associated with the salivary flow (T omas 1974a, b; C lark et al 1975).…”

Section: Discussionmentioning

confidence: 99%

Serum concentrations of total and ionized calcium and magnesium and inorganic phosphate during Na₂EDTA infusion in dairy cows

Riond

Liesegang

Fakler

et al. 1997

Animal Physiology Nutrition

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Summary The relationships of the serum concentration profiles of the ionized fractions of calcium and magnesium (Ca2+, Mg2+) to those of the respective total concentrations (Catot, Mgtot) were examined during a 5‐h infusion of 5 % Na2EDTA in six Brown Swiss dairy cows. The mean concentration of Catot decreased in two phases whereas that of Ca2+ decreased in one phase. At the end of the infusion, calcium was presumably either bound to EDTA or free. Mean Mgtot and Mg2+ serum concentrations did not change significantly during the course of the infusions. Mean Pi serum concentrations decreased until 1 h after the end of the infusion and increased regularly to reach pre‐infusion concentrations the following day. The longitudinal changes of the serum concentrations of Catot and Pi are discussed. It is concluded that the concentrations of Ca2+ are more adequate than those of Catot for the evaluation of the calcium mobilization rate. Zusammenfassung Serumkonzentrationen des ionisierten und gesamten Calciums und Magnesiums und des anorganischen Phosphors während einer Na2EDTA‐Infusion bei der Milchkuh Bei 6 Braunvieh Kühen wurde der Einfluss einer fünfstündigen Infusion einer 5 %igen Na2EDTA‐Lösung auf die Serumkonzentrationen des ionisierten Calciums und Magnesiums (Ca2+, Mg2+) und des gesamten Calciums und Magnesiums (Catot, Mgtot) untersucht. Die Mittelwerte der Catot‐Konzentrationen nahmen während der ersten 4 Stunden der Infusion nur langsam ab. Danach folgte ein rascher Abfall bis zum Ende der Infusion. Die Mittelwerte der Ca2+‐Konzentrationen sanken während der EDTA‐Infusion kontinuierlich ab. Am Ende der Infusion war das Calcium vermutlich entweder an EDTA gebunden oder frei. Auf die Mgtot‐ und Mg2+‐Serumkonzentrationen hatte die Na2EDTA‐Infusion keinen wesentlichen Einfluss. Die Pi‐Serumwerte nahmen während der Infusion ebenfalls ab. Der zeitliche Verlauf der Änderungen der Catot‐ und Pi‐Serumkonzentrationen wird diskutiert, und es wird gezeigt, daß die Calciumsmobilisierungsrate an Hand der Werte der Ca2+‐Konzentrationen besser beurteilt werden kann als an Hand des Gesamtcalciums. Résumé Concentrations sériques ionisées et totales du calium et magnésium et du phosphate inorganique pendant une perfusion de Na2EDTA chez la vache laitière La relation entre les concentrations sériques ionisées du calcium et du magnesium (Ca2+, M2+) avec celles de leur concentrations totales respectives (Ca2+, Mgtot) ont été examinées au cours d'une perfusion d'une durée de 5 heures d'une solution de 5 % de Na2EDTA chez 6 vaches laitières de la race brune suisse. La concentration moyenne de Catot a diminué en 2 phases alors que celle de Ca2+ a diminué en 1 phase. A la fin de la perfusion, le calcium était soit lié à l'EDTA ou libre. Les concentrations moyennes de Mgtot et de M2+ sont restées constantes au cours de la perfusion alors que les concentrations moyennes de Pi ont également diminués. Les changements longitudinaux des concentrations de Catot et de Pi sont discutés. En conclusion, les concentrations de Ca2+ sont plus adéquate...

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Section: Discussionmentioning

confidence: 99%

Serum concentrations of total and ionized calcium and magnesium and inorganic phosphate during Na₂EDTA infusion in dairy cows

Riond

Liesegang

Fakler

et al. 1997

Animal Physiology Nutrition

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“…Механізми засвоєння Фосфору в організмі кролів повністю не з'ясовані. У більшості видів ссавців неорганічний фосфор всмоктується з дванадцятипалої і тонкої кишки й регулюється ендокринною системою (Barlet et al, 1995). Дослідженнями (Sabbagh et al, 2011) з'ясовано існування активного механізму транспорту Фосфору з дванадцятипалої й проксимальної тонкої кишки у 3-місячних кроликів.…”

Section: таблицяunclassified

The influence of silicium compounds on the content of calcium, phosphorus and some lipides in the plasma blood

Ivanitskaya

Lesyk

2019

SMLNUVMB

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The aim of the study was to investigate the effects of nanotechnology and sodium metasilicate on the content of total calcium and inorganic phosphorus and individual lipids in the blood of rabbits from 52 to 110 days of life. Studies were conducted on young rabbits of Hyla breed in the private sector. Rabbits for the study were selected at the age of 41 days on the principle of analogues, weighing 1.2–1.4 kg, were divided into six groups (control and five experimental), 6 animals (3 males and 3 females) in each. Animals were kept in with adjustable microclimate and illumination in mesh cages measuring 50×120×30 cm, in accordance with modern animal health standards. The control group rabbits were fed without restriction a balanced granular compound feed, with free access to water. Animals I, II, and III of the study groups were fed a control group diet and fed citrate silicon for 24 hours, with a corresponding rate of 25; 50 and 75 µg Si/kg body weight. Young animals of the IV and V experimental groups were fed wit diet of the control group and water was given sodium metasilicate (Na2SiO3H2O) in the amount of 2.5 and 5.0 mg Si/kg body weight, respectively. The experiment lasted 68 days, including the preparatory period of 10 days, the experimental period – 58 days. In the preparatory period – at 52 days and experimental at 83 and 110 days of life (31 and 58 days of drinking additives) in 4 animals (2 males and 2 females) from the group blood samples were taken for biochemical studies. Studies have found that the concentration of total calcium in the blood plasma of rabbits III and IV study groups was higher by 9.6 and 6.4% (P < 0.05) for 58 days of the study compared with the control, indicating the stimulating effect of the organic compound silicon to activate the processes of assimilation of this macronutrient in the body of young rabbits. Silicone citrate in the large test quantities and sodium metasilicate in the blood plasma of animals of III, IV and V experimental groups respectively increased the level of inorganic phosphorus by 35.7; 28.5 and 35.7% (P < 0.05) than controls at day 58 of the study. In the final study period, the ratio of Calcium to Phosphorus in the animals of the II – V experimental groups was in the range of 2.0–1.73: 1, indicating a more pronounced effect of silicon compounds on the metabolism of Phosphorus during a longer period of supplementation. The content of triacylglycerols in the blood plasma of rabbits II and III of the experimental groups was lower (P < 0.05) at 31 and 58 days of the study compared with the control. The results obtained may indicate the activation of the processes of metabolic accumulation of plastic components of cell membranes and energy needs of body tissues. The use of silica organic compound reduced the cholesterol content by 37% (P < 0.05) in the blood of rabbits of the III experimental group at 31 days of the study. Whereas at the final stage of the experiment in animals II; In the 3rd and 4th research groups, its level was lower by 43.4; 36.9 and 42.2% (P < 0.05) compared to the control, indicating greater use of cholesterol by the organism with silica organic compound.

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“…Paracellular diffusion is the mechanism of Pi absorption from the large intestine (mainly in the colon). The process is triggered by high P concentration in the lumen (Barlet et al 1995).…”

Section: General Mechanisms Of Pi Absorptionmentioning

confidence: 99%

Phosphorus utilization in domestic animals

Cheng

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Physiologie de l'absorption intestinale du phosphore chez l'animal

Cited by 13 publications

References 32 publications

Serum concentrations of total and ionized calcium and magnesium and inorganic phosphate during Na₂EDTA infusion in dairy cows

Serum concentrations of total and ionized calcium and magnesium and inorganic phosphate during Na₂EDTA infusion in dairy cows

The influence of silicium compounds on the content of calcium, phosphorus and some lipides in the plasma blood

Phosphorus utilization in domestic animals

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Physiologie de l'absorption intestinale du phosphore chez l'animal

Cited by 13 publications

References 32 publications

Serum concentrations of total and ionized calcium and magnesium and inorganic phosphate during Na2EDTA infusion in dairy cows

Serum concentrations of total and ionized calcium and magnesium and inorganic phosphate during Na2EDTA infusion in dairy cows

The influence of silicium compounds on the content of calcium, phosphorus and some lipides in the plasma blood

Phosphorus utilization in domestic animals

Contact Info

Product

Resources

About

Serum concentrations of total and ionized calcium and magnesium and inorganic phosphate during Na₂EDTA infusion in dairy cows

Serum concentrations of total and ionized calcium and magnesium and inorganic phosphate during Na₂EDTA infusion in dairy cows