Multiple centrosomes enhance migration and immune cell effector functions of mature dendritic cells

• Published in: The Journal of cell biology Vol. 221; no. 12; p. 1
• Main Authors: Weier, Ann-Kathrin, Homrich, Mirka, Ebbinghaus, Stephanie, Juda, Pavel, Miková, Eliška, Hauschild, Robert, Zhang, Lili, Quast, Thomas, Mass, Elvira, Schlitzer, Andreas, Kolanus, Waldemar, Burgdorf, Sven, Gruß, Oliver J, Hons, Miroslav, Wieser, Stefan, Kiermaier, Eva
• Format: Journal Article
• Language: English
• Published: United States Rockefeller University Press 05.12.2022
• Subjects: Antigens; Cell activation; Cell Cycle Checkpoints; Cell interactions; Cell migration; Cell Movement; Centrosome - metabolism; Centrosomes; Chemotaxis; Cytokines; Cytokines - metabolism; Cytoskeleton; Dendritic cells; Dendritic Cells - metabolism; Dendritic structure; Diploids; G1 phase; Homeostasis; Humans; Immune response; Immune system; Immunology; Inflammation; Kinases; Leukocytes; Locomotion; Lymphocytes; Lymphocytes T; Microtubule-Organizing Center; Mitosis; Polo-like kinase; Protein Serine-Threonine Kinases - metabolism; T-Lymphocytes - metabolism; Tumorigenesis
• ISSN: 0021-9525; 1540-8140; 1540-8140
• DOI: 10.1083/jcb.202107134

Centrosomes play a crucial role during immune cell interactions and initiation of the immune response. In proliferating cells, centrosome numbers are tightly controlled and generally limited to one in G1 and two prior to mitosis. Defects in regulating centrosome numbers have been associated with cell transformation and tumorigenesis. Here, we report the emergence of extra centrosomes in leukocytes during immune activation. Upon antigen encounter, dendritic cells pass through incomplete mitosis and arrest in the subsequent G1 phase leading to tetraploid cells with accumulated centrosomes. In addition, cell stimulation increases expression of polo-like kinase 2, resulting in diploid cells with two centrosomes in G1-arrested cells. During cell migration, centrosomes tightly cluster and act as functional microtubule-organizing centers allowing for increased persistent locomotion along gradients of chemotactic cues. Moreover, dendritic cells with extra centrosomes display enhanced secretion of inflammatory cytokines and optimized T cell responses. Together, these results demonstrate a previously unappreciated role of extra centrosomes for regular cell and tissue homeostasis.