alexa Identification of monoclonal antibodies that recognize novel epitopes in native chondroitin dermatan sulfate glycosaminoglycan chains: their use in mapping functionally distinct domains of human skin.
Biochemistry

Biochemistry

Journal of Glycobiology

Author(s): Sorrell JM, Mahmoodian F, Schafer IA, Davis B, Caterson B

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Abstract Five monoclonal antibodies (MAb), 7D4, 4C3, 6C3, 4D3, and 3C5, were produced in mice immunized with high buoyant density embryonic chick bone marrow proteoglycans (PGs) as antigen. All of these MAb recognized epitopes in native chick bone marrow and cartilage PGs which could be selectively removed by chondroitinase ABC and chondroitinase AC II, indicating that their epitopes were present in chondroitin sulfate glycosaminoglycans (GAGs). These MAb recognized epitopes present in purified cartilage PGs obtained from a wide variety of different vertebrate species. However, none of the new MAb detected epitopes in Swarm rat chondrosarcoma PG. On the basis of these results, we propose that these MAb recognize novel epitopes located in chondroitin sulfate/dermatan sulfate glycosaminoglycan (CS/DS GAG) chains, representing at least four and possibly five different structures. Immunocytochemical studies have shown that the epitopes identified by these new MAb are differentially distributed in tissues. All of these MAb immunocytochemically detected epitopes in embryonic chick cartilage and bone marrow. Three of them (4C3, 7D4, and 6C3) recognized epitopes in adult human skin. All three detected epitopes in the epidermis, one (6C3) strongly detected epitopes in the papillary dermis, and two (4C3, 7D4) detected epitopes in the reticular dermis. Immunostaining patterns in skin using the new MAb directed against native CS/DS structures were distinctly different from those obtained using MAb against the common CS isomers. The distribution of these CS epitopes in functionally distinct domains of different tissues implies that these structures have functional and biological significance.
This article was published in J Histochem Cytochem and referenced in Journal of Glycobiology

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