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Am J Physiol Gastrointest Liver Physiol 283: G1185-G1196, 2002. First published July 11, 2002; doi:10.1152/ajpgi.00097.2002
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Vol. 283, Issue 5, G1185-G1196, November 2002

Acidomucin goblet cell expansion induced by parenteral nutrition in the small intestine of piglets

J. E. Conour1,*, D. Ganessunker4,*, K. A. Tappenden3,4, S. M. Donovan3,4, and H. R. Gaskins1,2,4

Departments of 1 Animal Sciences, 2 Veterinary Pathobiology, and 3 Food Science and Human Nutrition and 4 Division of Nutritional Sciences, University of Illinois, Urbana, Illinois 61801

Total parenteral nutrition (TPN) impairs small intestine development and is associated with barrier failure, inflammation, and acidomucin goblet cell expansion in neonatal piglets. We examined the relationship between intestinal goblet cell expansion and molecular and cellular indices of inflammation in neonatal piglets receiving TPN, 80% parenteral + 20% enteral nutrition (PEN), or 100% enteral nutrition (control) for 3 or 7 days. Epithelial permeability, T cell numbers, TNF-alpha and IFN-gamma mRNA expression, and epithelial proliferation and apoptosis were compared with goblet cell numbers over time. Epithelial permeability was similar to control in the TPN and PEN jejunum at day 3 but increased in the TPN jejunum by day 7. By day 3, intestinal T cell numbers were increased in TPN but not in PEN piglets. However, goblet cell expansion was established by day 3 in both the TPN and PEN ileum. Neither TNF-alpha nor IFN-gamma mRNA expression in the TPN and PEN ileum correlated with goblet cell expansion. Thus goblet cell expansion occurred independently of overt inflammation but in association with parenteral feeding. These data support the hypothesis that goblet cell expansion represents an initial defense triggered by reduced epithelial renewal to prevent intestinal barrier failure.

total parenteral nutrition; goblet cells; sulfomucin; barrier function

* J. E. Conour and D. Ganessunker contributed equally to this work.




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