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Developmental expression of two antigens associated with mouse intestinal crypts
J F Beaulieu1, G Millane, R Calvert
1Département d'anatomie et de biologie cellulaire, Faculté de médecine, Université de Sherbrooke, Québec, Canada.
Summary
Two new monoclonal antibodies, MIM-1/39 and MIM 1/130, target antigens in mouse intestinal crypts. Their expression patterns suggest a role in crypt formation and maintenance during development.
Area of Science:
- Developmental biology
- Gastroenterology
- Immunology
Background:
- The development and maintenance of intestinal crypts are crucial for gut function.
- Understanding the molecular markers associated with crypt formation is essential for developmental studies.
Purpose of the Study:
- To characterize the expression patterns of two novel antigens (MIM-1/39 and MIM 1/130) in the developing and adult mouse intestine.
- To investigate the potential role of these antigens in intestinal crypt formation and integrity.
Main Methods:
- Production of two monoclonal antibodies (MIM-1/39 and MIM 1/130) against duodenal mucosa.
- Immunohistochemical analysis of antigen expression in fetal and adult mouse small and large intestines.
- In vivo modulation of antigen expression using rat amniotic fluid extract.
Main Results:
- MIM-1/39 is expressed in epithelial cells during early gestation and subsequently in adult crypt cells, excluding goblet cells.
- MIM 1/130 is found in the mesenchymal matrix surrounding the developing and adult intestinal crypts.
- Maternal administration of amniotic fluid extract altered antigen expression patterns, mimicking later developmental stages.
Conclusions:
- The expression of MIM-1/39 and MIM 1/130 prior to crypt formation suggests a role in molecular differentiation for crypt development.
- The association of these antigens with differentiated crypts indicates their involvement in maintaining crypt integrity and function.