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Altered intestinal development after jejunal ligation in fetal sheep

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Abstract

Experimental obstruction of the fetal small intestine resulted in massive hypertrophy of the segment proximal to the site of obstruction. Villus morphology was grossly abnormal. Enterocytes developed many irregular features, most notably cytoplasmic extensions (pseudopods, or blebs) from their apical surface. Distal to the site of obstruction, morphological anomalies which resembled those seen after experimental oesophageal ligation were found. These included delayed disappearance of the apical endocytic network, disrupted or absent microvilli, glycogen accumulation and inappropriate cell extrusion. Proximal to the obstruction, where stasis of swallowed fluid occurs, distension and abnormal intestinal development ensues. Distal to the obstruction where the intestine develops in the absence of swallowed fluid, development is also abnormal. The anomalies resemble those noted after oesophageal ligation in utero, and possibly are the results of reduced cellular nutrition. These results suggest that fetal ingestion provides the develo** gastrointestinal tract with an important stimulus for normal growth.

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Authors and Affiliations

  1. Child Health Research Institute, Women's and Children's Hospital, Adelaide, Australia

    J. F. Trahair, H. F. Rodgers & J. C. Cool

  2. Department of Pediatric Surgery, Women's and Children's Hospital, Adelaide, Australia

    W. D. A. Ford

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  1. J. F. Trahair
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  2. H. F. Rodgers
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  3. J. C. Cool
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  4. W. D. A. Ford
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Trahair, J.F., Rodgers, H.F., Cool, J.C. et al. Altered intestinal development after jejunal ligation in fetal sheep. Vichows Archiv A Pathol Anat 423, 45–50 (1993). https://doi.org/10.1007/BF01606431

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  • DOI: https://doi.org/10.1007/BF01606431

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