Agglutinating activity of gliadin-derived peptides from bread wheat: implications for coeliac disease pathogenesis |
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| Authors: | S Auricchio G De Ritis M De Vincenzi E Mancini M Minetti O Sapora V Silano |
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| Institution: | 1. Clinica Pediatrica, II Facoltà di Medicina e Chirurgia, Naples, Italy;2. Gruppo di Ricerca del Consiglio Nazionale delle Ricerche sulla Fisiologia e Patologia dell''Apparato Digerente, Naples, Italy;3. Department of Comparative Toxicology and Ecotoxicology, Istituto Superiore di Sanità, Rome, Italy;4. Department of Cell Biology, Istituto Superiore di Sanità, Rome, Italy;5. Programme of Preventive Medicine, Project of Perinatal Pathologies and their Consequences, Consiglio Nazionale delle Ricerche, Rome, Italy |
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| Abstract: | The PT-digest of bread wheat gliadin was very active in agglutinating undifferentiated human K562(S) cells. This activity was quantitatively, but not qualitatively, similar to that of Con A or WGA. Moreover, Con A-induced cell agglutination was inhibited by mannan and mannose, WGA-induced agglutination by NAG only, and cell agglutination induced by bread wheat gliadin peptides was inhibited by each of these three saccharides. Not only was mannan the most active saccharide in preventing cell agglutination induced by bread wheat gliadin peptides, but it was also able to dissociate agglutinated cells. As compared to the PT- digest of whole bread wheat gliadin, the digest obtained from purified A-gliadin was tenfold more active. The PT-digest of durum wheat gliadin did not show any agglutinating activity. |
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| Keywords: | PT Peptic-tryptic PTC Peptic-tryptic-cotazym Con A Concanavalin A WAG Wheat germ agglutinin NAG N-acetyl-D-glucosammine MAC Minimal agglutinating concentration |
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