Eiyo To Shokuryo
Online ISSN : 1883-8863
ISSN-L : 0021-5376
The Effect of Thyroid Hormone, Growth Stage and Dietary Protein Level on the Growth and the Liver Arginase in the Mice
Kunioki HAYASHIYuichiro TOMITA
Author information
JOURNAL FREE ACCESS

1979 Volume 32 Issue 1 Pages 29-34

Details
Abstract
The Effect of Thyroid Hormone, Growth Stage and Dietary Protein Level on the Growth and the Liver Arginase in the Mice Kunioki HAYASHI, Yuichiro TOMITA Department of Zootechnical Science, Faculty of Agriculture, Kagoshima University, Kagoshima-shi, Kagoshima The experiments were conducted with intact male mice of the dd strain to investigate the effects of growth stage (23, 33 and 60 days of age) or dietary protein level (5-35%) on the responses of growth and liver arginase to the changes in thyroid function.
To change the thyroid function, L-thyroxine sodium salt (10μg/100g b. w., daily injected) and 2-thiouracil (mixed 0.05% in the diets) were used. Experimental diets were synthetic and they were fed ad libitum during 7 days experimental period. Results are summarized as follows.
1. Though thyroxine promoted the growth in 23 day old mice group, this promoting effect was not observed in the other age groups. Thiouracil suppressed the growth in 33 day old mice group, but not in the other age groups. Furthermore, at low protein (5-15%) diets, it was found that the growth promoting effect of thyroxine was not observed. The relationship between thiouracil effect and dietary protein level was not examined.
2. Liver arginase activity decreased in the thyroxine treated mice groups and increased in the thiouracil treated mice groups at all growth stages. However, when the dietary protein level was ex-tremely low (5%) liver arginase activity increased in the hyroxine treated mice groups.
Content from these authors
© Japanese Society of Nutrition and Food Science
Previous article Next article
feedback
Top