Hemolectin expression reveals functional heterogeneity in honey bee (Apis mellifera) hemocytes

• DOI: 10.1016/j.dci.2017.07.013
• Publication Date: 2017-07-13T07:51:29Z
• Authors: Erika Gábor; Gyöngyi Cinege; Gábor Csordás; Tibor Török; Katalin Folkl-Med...; Zsuzsanna Darula; István Andó; Éva Kurucz
• Keywords: Mammals; 0303 health sciences; Hemocytes; Platelet Aggregation; Sequence Homology, Amino Acid; Antibodies, Monoclonal; Thrombosis; Biodiversity; Cell Separation; Bees; 3. Good health; 03 medical and health sciences; Phagocytosis; Hemolymph; Lectins; von Willebrand Factor; Animals; Transcriptome; QR180 Immunology / immunológia

The identification of molecular markers considerably facilitated the classification and functional analysis of blood cell types. Apis mellifera hemocytes have been classified by morphological criteria and lectin binding properties; however, the use of molecular markers has been minimal. Here we describe a monoclonal antibody to a non-phagocytic subpopulation of A. mellifera hemocytes and to a constituent of the hemolymph clot. We demonstrate that the antibody identifies the A. mellifera hemolectin, a protein carrying human von Willebrand factor homology domains, characteristic of proteins involved in blood coagulation and platelet aggregation in mammals. Hemolectin expressing A. mellifera hemocytes contain the protein as cytoplasmic granules and contribute to the formation of a protein matrix, building up around foreign particles. Consequently, hemolectin as a marker molecule reveals a clear functional heterogeneity of hemocytes, allowing for the analytical separation of hemocyte classes, and could promote the molecular identification of hemocyte lineages in A. mellifera.