Simplified Preparation of a Refined Milk Formula Comparable to Rat's Milk: Influence of the Formula on Development of the Gut and Brain in Artificially Reared Rat Pups
作者:
Kanno Takahiro,
Koyanagi Namiko,
Katoku Youli,
Yonekubo Akie,
Yajima Takaji,
Kuwata Tamotsu,
Kitagawa* Hiroshi,
Harada† Etsumori,
期刊:
Journal of Pediatric Gastroenterology and Nutrition
(OVID Available online 1997)
卷期:
Volume 24,
issue 3
页码: 242-252
ISSN:0277-2116
年代: 1997
出版商: OVID
关键词: Artificial rearing;Intestine;Membrane fluidity;Microvillus membrane;Milk formula;Rat pups
数据来源: OVID
摘要:
Background:Milk formulas for artificially reared (AR) rat pups are mostly based on complex cow's milk products, prepared by laborious and time-consuming processes. The aim of this study was to develop a simplified procedure for preparing a refined formula and to examine its influences on gut and brain development.Methods:The formula comprised a combination of purified cow's casein and whey proteins, five kinds of edible oil, minerals, and vitamins. Detailed analyses showed that the composition of macro- and micro-nutrients, osmolarity, and pH of the new formula closely resembled those of rat's milk. Rat pups, each with an intragastric cannula implanted at age 5 days, were artificially reared for the following 10-15 days.Results:The body weight gain of AR pups matched that of mother-reared (MR) pups. Histoplanimetrical analyses showed that the small intestine in AR pups was more developed in relation to area of a transverse section, number and length of villi, and thickness of tunica muscularis than that of MR pups. Fat components in the formula influenced the fatty acid composition and the cholesterol-to-phospholipid ratio in the small intestinal microvillus membrane (MVM) of AR pups, but not the MVM fluidity. Brain weight was not significantly different between the two groups at age 15-20 days.Conclusion:This formula is useful for artificial rearing of rats and for identifying dietary components contributing to metabolic adaptation during the suckling period.
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