Últimos avances sobre los mecanismos reguladores de la absorción de fósforo
Recent advances on the regulatory mechanisms of phosphorus uptake

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Autores

RENE PATIÑO, P.

WILSON BARRAGAN, H.

OSCAR VERGARA

LIBARDO MAZA

Resumen

Como nutriente esencial el P ha sido investigado durante muchos años, pero en la actualidad, debido al efecto contaminante de este mineral, liberado en el ambiente a través de las excretas de los animales domésticos, nuevas líneas de investigación han aparecido con miras a determinar las exigencias nutricionales y a determinar los factores que afectan la excreción. La absorción es tal vez uno de los factores que más influencia la cinética metabólica del P, y esta a su vez, es influenciada por varios factores para mantener estable su homeostasis. Existen diferencias entre los animales rumiantes y monogástricos en relación a la forma como el P es metabolizado en el organismo, sin embargo los sistemas de absorción intestinal poseen características semejantes. El descubrimiento de varios sistemas de transporte del P en las membranas celulares del epitelio intestinal, y de varias sustancias que lo afectan, ha contribuido a esclarecer el metabolismo de este mineral y de porqué está completamente acoplado al metabolismo del Ca. Por lo tanto, resulta interesante considerar estas características para aumentar la utilización del P en las diferentes etapas fisiológicas de los animales domésticos, evitando su excesiva excreción, cuando la capacidad de absorción esta disminuida, o incrementando el P dietético, cuando su absorción se encuentra aumenta en las etapas de reposición mineral.

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Detalles del artículo

Referencias

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