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Early postnatal development of the intestine in progeny of protein-deprived rats
Insights
Prenatal protein restriction in rats stunts small intestine development, impacting villi and cell numbers. However, adequate nutrition post-birth allows for catch-up growth by 12 days.
Area of Science:
- Developmental Biology
- Nutritional Science
- Gastroenterology
Background:
- Maternal nutrition during gestation critically influences fetal development.
- Protein intake is essential for tissue growth and differentiation.
Purpose of the Study:
- To investigate the impact of maternal protein restriction on early postnatal small intestine development in rats.
- To determine if nutritional rehabilitation can reverse developmental deficits.
Main Methods:
- Rat dams were fed diets with 24% or 4% casein during gestation.
- Offspring were assessed at birth and at 4, 8, and 12 days of age.
- Intestinal morphometry and cell counts were analyzed.
Main Results:
- Newborns from protein-restricted dams exhibited shorter, narrower intestines with fewer villi and reduced absorptive and crypt cells.
- These morphometric deficits persisted at 4 and 8 days in undernourished pups.
- By 12 days, differences normalized in survivors receiving adequate nutrition.
Conclusions:
- Prenatal protein deficiency significantly impairs early small intestine development in rats.
- Postnatal nutritional support can lead to compensatory growth and normalization of intestinal structure by weaning age.
Abstract:
Development of the small intestine was studied in newborn, and 4-, 8-, and 12-day-old young of rats fed diets, during gestation, containing 24 or 4% casein as the source of protein. Newborn prenatally protein-deprived rats had shorter, narrower intestines, reduced numbers of villi per unit length, shorter villi, and reduced numbers of absorptive cells and crypt cells. These differences had disappeared by the age of 12 days in adequately fed pups that had survived to that age.