Anti alpha-galactosyl screening technique

G - Physics – 01 – N

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G01N 33/543 (2006.01) C07H 21/00 (2006.01) C07K 4/00 (2006.01) G01N 33/50 (2006.01) G01N 33/554 (2006.01) G01N 33/569 (2006.01) G01N 33/66 (2006.01)

Patent

CA 2207760

Compounds and libraries are labeled with a galactosyl epitope and then screened in accordance with an assay involving cells having a characteristic of interest. Conveniently, the screening may embody target cells, where the compounds are brought in contact with the cells. Each of the compounds carries with it the information of its identity or method of synthesis. After washing away non-specifically bound compounds, blood may be applied to the cells, whereby antibody binding to the galactosyl epitope initiates the complement cascade. Plaques are identified and the compound associated with the plaque identified. The formation of the plaque demonstrates that the compound has specific affinity for the target cell, binding of the compound to the cell does not interfere with binding of the antibody, and that the complex is capable of cytotoxic activity by means of the complement cascade.

On marque des composés et des bibliothèques au moyen d'épitopes de galactosyle qui sont ensuite filtrés dans le cadre d'un essai relatif à des cellules présentant une caractéristique d'intérêt. Le filtrage pourra comprendre des cellules cibles là où les composés sont en contact avec les cellules. Chacun desdits composés est porteur d'une information sur son identité ou son procédé de synthèse. Après élimination des composés non spécifiquement fixés, on peut appliquer du sang sur les cellules ce qui entraîne la fixation des anticorps aux épitopes de galactosyle et déclenche la cascade complémentaire. Les plaques sont identifiées ainsi que le composé qui leur est associé. La formation de plaques démontre que le composé présente une affinité spécifique pour la cellule cible, et que la fixation du composé aux cellules n'interfère pas avec la fixation de l'anticorps, et que le complexe est capable d'une activité cytotoxique due à la cascade complémentaire.

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