乳酸発酵粉乳投与時のラットにおける胃内窒素形態分布および門脈血しょう遊離アミノ酸濃度

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  • Nitrogen distribution in the stomach and free amino acid concentration in the portal blood plasma of rat fed fermented milk powder.
  • ニュウサン ハッコウ フンニュウ トウヨジ ノ ラット ニ オケル イナイ チ

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The digestion and absorption of a fermented milk protein in adult rats were compared with those of non-fermented milk powder in rats as a control. Two groups of rats were given fermented or nonfermented milk powder after 20 hours fasting and 6 rats of each group were sacrificed at regular intervals after feeding. The nitrogen distribution in the stomach contents and free amino acid concentrations in the portal blood plasma were determined.<BR>In the stomach contents, both the non-protein and amino nitrogen were higher for fermented milk powder group than for non-fermented one. The pH values in fundus were lower for rats fed fermented milk powder than for those fed non-fermented milk powder, but there was no difference in antrum pylori between them. The effluence of nitrogen from the stomach of rats fed fermented milk powder was more rapid than that of rats fed non-fermented milk powder. The free amino acid concentration in the portal blood plasma increased during the first 1 hour after feeding of the fermented milk powder, followed by a gradual decrease. On rats' being fed the non-fermented milk powder, the plasma amino acid concentration reached the maximum value 4.5 hours after feeding.<BR>These results suggest that the digestion and absorption of milk protein may be accelerated to a certain extent with milk powder fermented by lactic acid bacteria.

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