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Journal of Histochemistry and Cytochemistry, Vol. 48, 1657-1666, December 2000, Copyright © 2000, The Histochemical Society, Inc.
Developmental Mucin Gene Expression in the Gastroduodenal Tract and Accessory Digestive Glands. I. Stomach: A Relationship to Gastric Carcinoma
Marie-Pierre Buisinea,b,e,
Louise Devismec,
Vincent Maunouryd,
Elisabeth Deschodta,
Bernard Gosselinc,e,
Marie-Christine Copinb,c,e,
Jean-Pierre Auberta,b, and
Nicole Porcheta,b,e
a Laboratoire de Biochimie et de Biologie Moléculaire, Hôpital C. Huriez, CHRU
b Unité 377 INSERM,
c Laboratoire d'Anatomie et Cytologie Pathologiques, Hôpital A. Calmette, CHRU
d Centre Multidisciplinaire de Traitement par Laser, CHRU
e Université de Lille II, Lille, France
Correspondence to:
Nicole Porchet, Unité 377 INSERM, Place de Verdun, 59045 Lille Cedex, France. E-mail: jpa@lille.inserm.fr
Studies were undertaken to provide information regarding cell-specific expression of mucin genes in stomach and their relation to developmental and neoplastic patterns of epithelial cytodifferentiation. In situ hybridization was used to study mRNA expression of eight mucin genes (MUC14, MUC5AC, MUC5B, MUC6, MUC7) in stomach of 13 human embryos and fetuses (827 weeks' gestation), comparing these with normal, metaplastic, and neoplastic adult tissues. These investigations have demonstrated that MUC1, MUC4, MUC5AC, MUC5B, and MUC6 are already expressed in the embryonic stomach at 8 weeks of gestation. MUC3 mRNA expression can be observed from 10.5 weeks of gestation. MUC2 is expressed at later stages, concomitant with mucous gland cytodifferentiation. Normal adult stomach is characterized by strong expression of MUC1, MUC5AC, and MUC6, less prominent MUC2, and sporadic MUC3 and MUC4, without MUC5B and MUC7. Intestinal metaplasia is characterized by an intestinal-type pattern with MUC2 and MUC3 mRNA expression. Gastric carcinomas exhibit altered mucin gene expression patterns with disappearance of MUC5AC and MUC6 mRNAs in some tumor glands, abnormal expression of MUC2, and reappearance of MUC5B mRNAs. In conclusion, we have observed that patterns of mucin gene expression in embryonic and fetal stomach could show similarities with some gastric carcinomas in adults. Differences in mucin gene expression in developmental, metaplastic, and neoplastic stomach compared to normal adult stomach suggest a possible regulatory role for their products in gastric epithelial cell proliferation and differentiation.
(J Histochem Cytochem 48:16571665, 2000)
Key Words:
human mucin genes, stomach, development, differentiation, gastric carcinomas, in situ hybridization

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