The Interactive Effect of Dietary Fat-Soluble Vitamin Levels on the Depression of Gonadal Development in Growing Male Rats Kept under Disturbed Daily Rhythm -Investigations Based on the L16(215) Type Orthogonal Array- : —Investigations Based on the L16(2

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概要

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• The purpose of this study was to clarify the effects of nutrients on the gonadal development of male rats kept under constant darkness as a model of disturbed daily rhythm. In the present study we examined fat-soluble vitamins and their interactions in this test population. Four fat-soluble vitamins (vitamin A (V.A), vitamin D (V.D), vitamin E (V.E) and vitamin K (V.K)) were selected as experimental factors, and the dietary content of these vitamins was normal (AIN-93G) or three times the normal content. Lighting conditions (constant darkness or normal lighting) were also added as a factor. Four-week-old rats (Fischer 344 strain) were kept under constant darkness or normal lighting (12-h light/dark cycle) for 4 wk. The lighting condition and V.E, and the interactions between the lighting condition and V.E and between V.A and V.D were observed to affect the testes and epididymides weights. There was an influence of the lighting condition only on the seminal vesicles and prostate weights and the serum testosterone concentration. Among the constant darkness groups (D-groups), the highest value for testes weight was observed under the normal-V.A, normal-V.D and high-V.E diet. The interaction between lighting condition and V.E showed the testes weight increased slightly in response to changing to a high-V.E diet from a normal-V.E diet under normal lighting (N-group) but was greatly increased in response to this change in the D-group. It became clear that the amount of dietary V.E necessary for the gonadal development of rats increases when rats are kept under constant darkness.

著者

• Esashi Takatoshi

  Department Of Human Life And Culture Seitoku University

• Hanai Miho

  Department Of Biological Science State University Of New York College At Brockport

関連論文

• The Effects of Nutrients in Improving the Depression of Gonadal Development in Growing Male Rats Kept under Disturbed Daily Rhythm : Investigations Based on the L_8(2^7) Type Orthogonal Array
• A Mainstay of Functional Food Science in Japan-History, Present Status, and Future Outlook
• The Interactive Effect of Dietary Water-Soluble Vitamin Levels on the Depression of Gonadal Development in Growing Male Rats Kept under Disturbed Daily Rhythm
• Effect of Dietary Protein Levels on Sex Hormones in Growing Male Rats Kept under Constant Darkness
• The Interactive Effect of Dietary Fat-Soluble Vitamin Levels on the Depression of Gonadal Development in Growing Male Rats Kept under Disturbed Daily Rhythm -Investigations Based on the L16(215) Type Orthogonal Array- : —Investigations Based on the L16(2
• Effect of Dietary Protein Levels on Sex Hormones in Growing Male Rats Kept under Constant Darkness
• Dietary Reference Intakes for Japanese 2010: Microminerals
• Dietary Reference Intakes for Japanese 2010: Macrominerals

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