Increase of intestinal calcium absorption and bone mineral density by heated algal ingredient (HAI) in rats.
J Bone Miner Metab
; 18(3): 165-9, 2000.
Article
en En
| MEDLINE
| ID: mdl-10783851
ABSTRACT
Active absorbable calcium (AAACa) produced by adding HAI (heated algal ingredient) to oyster shell calcium (AACa) is quite efficiently absorbed from the intestine and can increase bone mineral density in elderly osteoporotic patients. HAI was produced by heating the seaweed Cystophyllum fusiforme under reduced pressure, extracting with 6N HCL, and partially neutralizing it. Butanol-ethanol extraction then yielded active HAI fraction A, corresponding to about 1% in weight. The active HAI fraction increased intestinal Ca absorption as shown by a dose-dependent increase of plasma Ca in young male parathyroidectomized rats maintained on a low-Ca diet by administration through a stomach tube with a constant dose of AACa. The action of the active fraction A to maintain bone mass was then tested in young male rats kept on a low-Ca diet for 2 weeks. Bone weight, trabecular bone density, and strength-strain index as indices of bone strength measured by peripheral computed tomography (pQCT) tended to increase when the active HAI fraction was given along with Ca. HAI increased intestinal Ca absorption and prevented the decrease of bone density in rats kept on a low-Ca diet.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Algas Marinas
/
Calcio
/
Fémur
/
Absorción Intestinal
Límite:
Animals
Idioma:
En
Revista:
J Bone Miner Metab
Asunto de la revista:
METABOLISMO
Año:
2000
Tipo del documento:
Article
País de afiliación:
Japón