title: Cytochalasin B partially inhibits the oxalate-induced radial segmentation of mononucleated blood cells.
abstract: Cytochalasin B (CB), 5 microgram/ml (= 1.0 x 10(-5) M), inhibited the oxalate-induced radial segmentation of the nuclei of lymphocytes and monocytes from peripheral blood. The median inhibition was 60%. The oxalate-induced radial segmentation (RS) is thought to be due to a microtubule-dependent contraction of the intermitotic residue of the mitotic apparatus around the nucleus. CB is thought to inhibit cell locomotion and cytokinesis by a centripetal contraction of the membrane-associated contractile cell layer without subsequent relaxation. It is thus suggested that the CB inhibition of the oxalate-induced RS was due to a spatial interference of the CB-induced contraction with the formation of RS nuclei.
mesh_terms: D002462:Cell Membrane / Q000187:drug effects; D002465:Cell Movement / Q000187:drug effects; D002467:Cell Nucleus / Q000187:drug effects; D003571:Cytochalasin B / Q000494:pharmacology*; D006801:Humans; D008214:Lymphocytes / Q000187:drug effects* / Q000648:ultrastructure; D008870:Microtubules / Q000187:drug effects; D009000:Monocytes / Q000187:drug effects* / Q000648:ultrastructure; D010070:Oxalates / Q000494:pharmacology*
chemical_list: D010070:Oxalates; D003571:Cytochalasin B