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Journal of Nutrition Vol. 76 No. 2 February 1962, pp. 119-123
Copyright © 1962 by American Society for Nutrition
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Nutritional and Microbial Effects on Liver Monoamine Oxidase and Serotonin in the Chick1

A. W. Phillips, H. R. Newcomb, F. A. Rupp and R. Lachapelle

Biological Research Laboratories, Department of Bacteriology and Botany, Syracuse University, Syracuse, New York

The total liver monoamine oxidase in germfree chicks was significantly higher than in conventional (contaminated) animals. Chicks monocontaminated with a Bacillus sp., manifested a liver enzyme value that was intermediate between the two above groups of animals. The concentrations of liver serotonin were similar in germfree and conventional chicks. A pyridoxine deficiency in conventional birds reduced liver serotonin, and elevated liver monoamine oxidase activity. Possible explanations of these results were discussed.

1 These studies were aided by grants A-2999 and E-3693 from the National Institutes of Health, U. S. Public Health Service.

Manuscript received 5 April 1961.




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