Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/9125
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Type: Journal article
Title: Transforming growth factor-β levels in maternal milk and expression in postnatal rat duodenum and ileum
Other Titles: Transforming growth factor-beta levels in maternal milk and expression in postnatal rat duodenum and ileum
Author: Penttila, I.
van Spriel, A.
Zhang, M.
Xian, C.
Steeb, C.B.
Cummins, A.
Zola, H.
Read, L.
Citation: Pediatric Research, 1998; 44(4):524-531
Publisher: Nature Publishing Group
Issue Date: 1998
ISSN: 0031-3998
1530-0447
Abstract: After birth, the gastrointestinal tract of the neonate is exposed to food and bacterial and environmental antigens. Maternal milk components may play a role in regulation of mucosal immune activity to luminal antigens. In this study we determine the ontogeny of transforming growth factor (TGF)-beta1-producing cells in the rat pup small intestine and assess maternal milk concentrations of TGF-beta. Intestinal tissue samples of duodenum and ileum were collected, processed, and stained for TGF-beta1, and in situ hybridization for TGF-beta1 mRNA was also performed on the duodenum. TGF-beta levels in milk were assayed by ELISA. TGF-beta2 levels in milk were high at d 6, and declined thereafter at d 10 and 19. TGF-beta1 was not detected. In contrast, the cell number and intensity of staining of TGF-beta1 peptide in the small intestine was low in 3- and 10-d-old rats and increased markedly by 19 d of life. In the duodenum mRNA levels mirrored this trend. TGF-beta1 expression in the lamina propria was absent before d 19, and increased progressively over time. Maternal milk TGF-beta2 levels are high in early milk and decrease during the weaning period. In contrast, endogenous TGF-beta production in the small intestine increases during the weaning period.
Keywords: Intestinal Mucosa
Duodenum
Ileum
Milk
Animals
Rats
Rats, Wistar
Transforming Growth Factor beta
RNA, Messenger
Immunohistochemistry
In Situ Hybridization
Transcription, Genetic
Gene Expression Regulation, Developmental
Aging
Postpartum Period
Female
Rights: Copyright status unknown
DOI: 10.1203/00006450-199810000-00010
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Medicine publications

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