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Development, Vol 115, Issue 2 561-572, Copyright © 1992 by Company of Biologists

JOURNAL ARTICLES

Characterization of HNK-1 antigens during the formation of the avian enteric nervous system

TM Luider, MJ Peters-van der Sanden, JC Molenaar, D Tibboel, AW van der Kamp and C Meijers
Department of Pediatric Surgery, Erasmus University, Sophia Children's Hospital, Rotterdam, The Netherlands.

During vertebrate embryogenesis, interaction between neural crest cells and the enteric mesenchyme gives rise to the development of the enteric nervous system. In birds, monoclonal antibody HNK-1 is a marker for neural crest cells from the entire rostrocaudal axis. In this study, we aimed to characterize the HNK-1 carrying cells and antigen(s) during the formation of the enteric nervous system in the hindgut. Immunohistological findings showed that HNK-1-positive mesenchymal cells are present in the gut prior to neural crest cell colonization. After neural crest cell colonization this cell type cannot be visualized anymore with the HNK-1 antibody. We characterized the HNK-1 antigens that are present before and after neural crest cell colonization of the hindgut. Immunoblot analysis of plasma membranes from embryonic hindgut revealed a wide array of HNK-1-carrying glycoproteins. We found that two HNK-1 antigens are present in E4 hindgut prior to neural crest cell colonization and that the expression of these antigens disappears after neural crest colonization. These two membrane glycoproteins, G-42 and G-44, have relative molecular masses of 42,000 and 44,000, respectively, and they both have isoelectric points of 5.5 under reducing conditions. We suggest that these HNK-1 antigens and the HNK-1-positive mesenchymal cells have some role in the formation of the enteric nervous system.


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© The Company of Biologists Ltd 1992