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Identification of a putative cell adhesion domain of uvomorulin
Abstract:
A rat monoclonal antibody (DECMA-1) selected against the murine cell adhesion molecule uvomorulin blocks both the aggregation of mouse embryonal carcinoma cells and the compaction of pre-implantation embryos. However, decompacted embryos eventually become recompacted in the presence of DECMA-1 and form blastocysts composed of both trophectoderm and inner cell mass. DECMA-1 also disrupts confluent monolayers of Madin-Darby canine kidney (MDCK) epithelial cells. DECMA-1 recognizes uvomorulin in extracts from mouse and dog tissues. Protease digestion of mouse and dog uvomorulin generated core fragments including one of 26 kd which reacted with DECMA-1. The same 26-kd fragment is recognized by anti-uvomorulin monoclonal antibodies which have been obtained from other laboratories and which dissociate MDCK cell monolayers and block the formation of the epithelial occluding barrier. This 26-kd fragment therefore seems to be involved in the adhesive function of uvomorulin.
Insights
The rat monoclonal antibody DECMA-1 inhibits uvomorulin, a cell adhesion molecule crucial for early embryo development and epithelial cell organization. This antibody targets a specific fragment involved in cell adhesion.
Area of Science:
- Cell Biology
- Developmental Biology
- Immunology
Background:
- Uvomorulin is a key cell adhesion molecule involved in embryonic development and epithelial tissue formation.
- Monoclonal antibodies offer precise tools to investigate molecular functions.
Purpose of the Study:
- To characterize the function of uvomorulin using the rat monoclonal antibody DECMA-1.
- To identify the specific domain of uvomorulin responsible for its adhesive properties.
Main Methods:
- Utilized monoclonal antibody DECMA-1 to study cell aggregation and embryo compaction.
- Investigated the effects of DECMA-1 on Madin-Darby canine kidney (MDCK) epithelial cell monolayers.
- Performed protease digestion of uvomorulin and analyzed fragment binding with DECMA-1 and other antibodies.
Main Results:
- DECMA-1 blocked mouse embryonal carcinoma cell aggregation and pre-implantation embryo compaction.
- Decompacted embryos eventually recompacted and formed blastocysts in the presence of DECMA-1.
- DECMA-1 disrupted confluent MDCK cell monolayers and recognized a 26-kd fragment of uvomorulin.
- This 26-kd fragment was also recognized by other antibodies that disrupt epithelial barriers.
Conclusions:
- The 26-kd fragment of uvomorulin is critical for its adhesive function.
- DECMA-1 is a valuable tool for studying uvomorulin's role in cell adhesion and embryonic development.