Absence d'effet de la vitamine D sur la phytase et la phosphatase alcaline intestinales : relation avec l'absorption du phosphore phytique chez le porc

Fontaine, Nicole; Fourdin, Annie; Pointillart, Alain; Cayron, B.; Camus, Pierrette; Colin, Colette

doi:10.1051/rnd:19850511

Cited by 14 publications

(7 citation statements)

References 12 publications

(13 reference statements)

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“…Phosphatasaemia of the AFP groups was lower than that of the controls. The presence of elevated plasma ALP concentration in pigs fed phytic-P-rich diets is thus confirmed by the present study [11,29,37].…”

Section: Introductionsupporting

confidence: 74%

Effects of Aspergillus fumigatus phytase on phosphorus digestibility, phosphorus excretion, bone strength and performance in pigs

Nunes¹,

Guggenbuhl²

1998

Reprod. Nutr. Dev.

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-Phytic-phosphorus has a very low bioavailability for monogastric animals and the nonutilized mineral contributes to the phosphorus (P) pollution problems. Phytases may ameliorate phytic-P antinutritive properties. However, phytases are very sensitive to the pelleting temperature commonly used for compound feed production and thus the challenge to produce a more thermostable phytase is very important. Pure Aspergillus fumigatus phytase (AFP) has the ability to refold into a native-like fully active structure after heat denaturation (20 min at 90 °C). The aim of the present work was to evaluate in vitro (in feed) and in vivo in young and in growing-finishing pigs the effects of AFP included in the feed at a level of 500 U/kg. Feed supplementation with AFP resulted in an in vitro phosphorus release of about three times higher than that obtained from the basal diets, irrespective of the pH value used for the determination (5.5 or 7). When the supplemented feed was steam pelleted at about 84 °C, the free P obtained after incubation at pH 5.5 represented 53 % on an average of that obtained from the corresponding mash diets. The phytic-P-rich diets systematically induced hypophosphataemia, hypercalcaemia and hyperphosphatasaemia. The normal blood levels of P, Ca and alkaline phosphatase were restored by AFP. P apparent digestibility was significantly higher for the AFP diet (52.8 versus 30.8 %). The

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Section: Introductionsupporting

confidence: 74%

Effects of Aspergillus fumigatus phytase on phosphorus digestibility, phosphorus excretion, bone strength and performance in pigs

Nunes¹,

Guggenbuhl²

1998

Reprod. Nutr. Dev.

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“…Negative effects of rapeseed meal on bone mineralization have been described in rats (Momcilovic and Shah, 1976). Both Ca and P utilization decreased with time, between 3 and 6 wk, in pigs fed phytate-rich diets containing rapeseed (Pointillart et al, 1985). This is unlikely in the present experiment because the value for P digestibility of the diet containing rapeseed (control) was equal to that observed in pigs fed the same diet over 3 wk (Fourdin et al, 1988).…”

Section: Discussionmentioning

confidence: 49%

“…Thus, both diets were considered marginally deficient in P and Ca compared with the French dietary allowances for growing pigs (.6% P and .95% Ca, respectively; Gubguen and Perez, 1981). These low Ca contents were chosen to minimize interference between Ca and phytate P absorption, which has been described in many species, including pigs (Taylor, 1965;Taylor and Coleman, 1979;Pointillart et al, 1985). Phytase activity determined at pH 5.2 (Bitar and Reinhold, 1972) was 1,200 I U k g (1 IU is 1 p o l phosphorus liberated from sodium phytatelmin at 3TC) in the rye bran diet and was nondetectable in the control diet.…”

Section: Methodsmentioning

confidence: 99%

Enhancement of phosphorus utilization in growing pigs fed phytate-rich diets by using rye bran.

Pointillart

1991

Journal of Animal Science

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Some cereal by-products, such as bran, exhibit a high phytase activity that may enhance phytate P digestibility. This was studied in growing pigs fed a phytase-rich (1,200 IU/kg) diet containing 20% rye bran. The trial involved 12 animals; six were fed a control diet and six were fed a diet containing rye bran for 2 mo. Both diets contained the same levels of energy, protein, Ca (.7%) and total P (.4%). No inorganic P was added; thus, the dietary P was mainly phytic. Pigs fed the control diet, in contrast to those fed the diet containing rye bran, developed a P deficiency, as indicated by hypophosphatemia, hypophosphaturia, hyperhydroxyprolinuria, hypercalcemia, and hypercalciuria. Phosphorus from the rye bran diet was more completely absorbed (55 vs 36%) and retained (50 vs 36%) than that from the control diet. Calcium absorption was equal for the two diets, but Ca retention was higher in pigs fed rye bran than in controls. Pigs fed the rye bran diet showed greater bone density, ash content, and bending moments than controls. In conclusion, high dietary phytase levels or phytase-rich by-products increased phytate P availability and consequently improved bone scores.

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“…Phytic acid and its salts are the main phosphorus reservoir for germinating seeds (Samotus and Schwimmer 1962;Abernethy et a1 1973) but cannot serve as a phosphorus source for monogastric animals, especially poultry (Nelson 1976;Ballam et a/ 1985;Fontaine et a/ 1985). The high level of phytic acid in many feed ingredients for poultry requires additional phosphorus to be included in the diet (Scott et a/ 1978).…”

Section: Introductionmentioning

confidence: 99%

Dephosphorylation of phytate compounds by means of acid phosphatase from Aspergillus niger

Żyła¹,

Kujawski²,

Koreleski³

1989

J Sci Food Agric

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Absence d'effet de la vitamine D sur la phytase et la phosphatase alcaline intestinales : relation avec l'absorption du phosphore phytique chez le porc

Cited by 14 publications

References 12 publications

Effects of Aspergillus fumigatus phytase on phosphorus digestibility, phosphorus excretion, bone strength and performance in pigs

Effects of Aspergillus fumigatus phytase on phosphorus digestibility, phosphorus excretion, bone strength and performance in pigs

Enhancement of phosphorus utilization in growing pigs fed phytate-rich diets by using rye bran.

Dephosphorylation of phytate compounds by means of acid phosphatase from Aspergillus niger

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