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Original Articles

Influence of live weight of rats on the intestinal in vitro absorption of nickel using everted sacs

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Pages 287-291 | Received 17 Oct 1995, Published online: 10 Jan 2009
 

Abstract

The influence of the live weight of the experimental animals on the Ni absorption was investigated in vitro with everted sacs from rats. Totally 75 male rats in the live weight range from 30 to 250 g were used. With increasing live weight the Ni uptake by the intestinal wall and the Ni transfer across the intestinal wall decreased significantly. Ni transfer was already significantly reduced by 45% when body weight increased from 30 to 60 g. For the animals with a live weight above 200 g Ni transfer reached only about 10% of the Ni transfer measured for the animals with 30 g live weight. The decline of the Ni uptake by the intestinal wall was only slightly in the live weight range from 30 to 150 g. Within the live weights higher than 190 g Ni uptake by the intestinal wall decreased significantly to about 25% compared to the animals with 30 g live weight.

Der Einfluß der Lebendmasse der Versuchstiere auf die Ni‐Absorption wurde in vitro mit evertierten Darmsäckchen von Ratten untersucht. Insgesamt wurden 75 männliche Ratten im Lebendmassebereich von 30 bis 250 g herangezogen. Mit steigender Lebendmasse ergab sich ein signifikanter Rückgang der Ni‐Aufnahme in die Darmwand sowie des Ni‐Durchtritts in die Serosalösung. Dabei war der Ni‐Durchtritt bereits bei einer Erhöhung der Lebendmasse von 30 auf 60 g nachweisbar um 45% vermindert und betrug bei den Tieren über 200 g Lebendmasse nur noch ca. 10% des Durchtritts der 30 g schweren Tiere. Die Ni‐Aufnahme in die Darmwand war bei Tieren mit einer Lebendmasse von 30 bis 150 g ähnlich hoch, betrug allerdings bei Tieren über 190 g Lebendmasse nur noch 25% im Vergleich zu den 30 g schweren Tieren.

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