PMID: 9161948May 1, 1997Paper

Digestion of proteins in human milk, human milk fortifier, and preterm formula in infant rhesus monkeys

Journal of Pediatric Gastroenterology and Nutrition
T LindbergB Lönnerdal

Abstract

There is limited information in the literature on the capacity of the preterm infant to digest human and bovine milk proteins. We therefore studied in vivo the luminal phase of the hydrolysis of proteins in human milk, human milk fortifier, and preterm formula in preterm rhesus monkeys and in infant rhesus monkeys at 6 weeks and 7 months of age. Protein hydrolysis was followed by polyacrylamide gradient gel electrophoresis and electroimmunoassay. The serum level of absorbed unhydrolyzed human alpha-lactalbumin was measured by a radioimmunoassay method. Trypsin and elastase activities in duodenal contents were measured before and after the meal. In 6-week-old monkeys, the enzyme activities decreased by 50% postprandially, whereas they increased in 7-month-old monkeys. In preterm and in 6-week-old monkeys, hydrolysis of human and bovine whey proteins was slow, and in 6-week-old monkeys, 30-50% of the proteins could still be detected immunochemically in duodenal contents after 60 min. At these ages, serum level of absorbed alpha-lactalbumin were high. At 7 months of age, no or small (lactoferrin and bovine serum albumin) amounts of the proteins could be detected in duodenal contents after 15 min. At this age alpha-lactalbumin was ...Continue Reading

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Citations

Mar 2, 2012·The British Journal of Nutrition·Karima BouzerzourDidier Dupont
Dec 30, 2015·Critical Reviews in Food Science and Nutrition·David C DallasJ Bruce German
Nov 30, 2006·Journal of Pediatric Gastroenterology and Nutrition·Wolfram M BrückGlenn R Gibson
Dec 2, 2006·Experimental Biology and Medicine·Per T Sangild

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