Why does a Difference in Growth Rate between Rats of the Wistar and Sprague Dawley Strains Occur when a Niacin-Free and Tryptophan-Limiting Diet is Fed?

  • T. Hayakawa
  • K. Shibata
  • K. Iwai
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 294)


In the course of our experiments on tryptophan (Trp)-NAD metabolism, we have found that the rats of the Sprague-Dawley (SD) strain showed good growth as compared to those of the Wistar strain (Shibata et al., 1980) when they were fed a niacin-free diet containing 8.0 % amino acid mixture simulating rice protein supplemented with some limiting amino acid except for Trp (Yo-shida, 1971). We also found that the total amounts of Trp metabolites in liver, kidneys and urine were higher in the SD strain than in the Wistar strain (Shibata et al., 1982). These findings prompted us to compare enzyme activities involved in the Trp-NAD pathway in the two strains of rats fed a normal diet.


Quinolinic Acid Anthranilic Acid Amino Acid Mixture Wistar Strain Limit Amino Acid 
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Copyright information

© Plenum Press, New York 1991

Authors and Affiliations

  • T. Hayakawa
    • 2
  • K. Shibata
    • 1
  • K. Iwai
    • 3
  1. 1.Dept. of Food Science and NutritionTeikoku Women’s Univ.Osaka 570Japan
  2. 2.Dept. of NutritionTokyo Univ. of AgricultureTokyo 156Japan
  3. 3.Faculty of Home EconomicsKobe Women’s Univ.Kobe 654Japan

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