Journal of Nutrition and Health

The Korean Nutrition Society (한국영양학회)
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The Effect of Sulfur Amino Acid Content of the Diet upon Plasma Taurine Concentration and Hepatic Cysteinesulfinate Decarboxylase Activity of the Early Weaned Pigs

초기 이유된 돼지에 있어서 식이내 함황 아미노산 함량이 혈장 타우린 농도와 간의 Cysteinsulfinate decarboxylase 활성에 미치는 영향

  • Published : 1996.04.01
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Abstract

Eighteen crossbred pigs were weaned at 4 days of age and fed up to 28 days of age to examine the effect of sulfur amino acid content of three diets upon plasma taurine concentration and hepatic cysteinesulfinate decarboxylase activity. The experimental diets consisted of either whey protein (W) or partialy hydrolyzed soy protein (S) as the source of protein. 0.25% methionine was added to the S diet for the third dietary regimen (SM). Sulfur amino acid content(methionine plus cystine)of the three diets was 1.53%, 1.34% and 1.09% for the W, SM and S diet, respectively. Plasma taurine concentration from the pigs fed the three experimental diets reflected the total sulfur amino acid content of the diet. The S diet resulted in a significantly lower plasma tarrine level than the W and SM diets throughout the experiment. After three weeks, pigs fed the W diet had significantly higher plasma taurine concentration than those fed SM diet. Therfore it appears that taurine requirement of the pig depends on the sulfur amino acid contents of the diets and the conversion o sulfur amino acid to taurine seemed not to be limited by any factor when sulfur amino acid was below 1.53% of the diet. There was no significant difference between three dietary groups in hepatic cysteinesulfinate decarboxylase activity and this suggests that the reduced cysteinesulfinate decarboxylase activity due to high sulfur amino acid in the diet may not occur in the pig liver.

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References

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