493 Identification of different classes of antagonist monoclonal antibodies targeting the myeloid checkpoint CLEC-1 and their associated anti-tumoral in vivo efficacies in humanize... od Vanessa Gauttier, Marion Drouin, Caroline Mary, Géraldine Teppaz, Ariane Desselle, Virginie Thépénier, Emmanuelle Wilhelm, Elise Chiffoleau, Nicolas Poirier, Isabelle Girault, Cecile Batty, Marine Malloci, Julien Taurelle, Irène Baccelli, Stéphanie Neyton, Mylène Deramé, Kevin Biteau, Marion Colonello