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M P Buisine
a Unité 377 INSERM and
Laboratoire de Biochimie et de Biologie Moléculaire, Hôpital C
Huriez, b Laboratoire d'Anatomie et Cytologie Pathologiques, Hôpital
A Calmette, c Unité 482 INSERM, Hôpital Saint Antoine, Paris, France, d Institute of Child Health, University of
Birmingham, UK
Correspondence to: Dr
J P Aubert, Unité 377 INSERM, Place de Verdun, 59045 Lille Cedex,
France. Accepted for publication 13 March 1998 Background Keywords:
mucin genes;
mucins;
intestine;
differentiation;
human fetus
The intestinal epithelium is covered
by a continuous layer of mucus which is secreted by well differentiated
epithelial cells. Disregulation of the expression of mucins has been
reported to have possible implications in the neoplastic process which affects intestinal mucosae. It is well known that preneoplastic and
neoplastic tissues can express fetal phenotypic characteristics.
Aims
To assess whether the expression of mucin
genes in the intestinal tract is linked to the stage of cellular
differentiation and tissue development, by studying the expression of
six mucin genes in human fetal small intestine and colon, and also
adult tissues.
Methods
In situ hybridisation was used to study
mRNA expression of MUC2, MUC3, MUC4, MUC5B, MUC5AC, and MUC6 in 32 human embryos and fetuses (6.5-27 weeks gestation). Normal adult
mucosae were used as controls.
Results
Three mucin genes, MUC2, MUC4, and
MUC5AC, were differently expressed in fetal intestine compared with
expression in normal adults.
Conclusion
These differences in mucin gene
expression suggest a possible regulatory role for these products in
intestinal epithelial cell differentiation.
(GUT 1998;43:519-524)
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