Latrunculins: novel marine toxins that disrupt microfilament organization in cultured cells

See allHide authors and affiliations

Science  04 Feb 1983:
Vol. 219, Issue 4584, pp. 493-495
DOI: 10.1126/science.6681676


Two toxins, latrunculins A and B, which contain a new class of 16- and 14-membered marine macrolides attached to the rare 2-thiazolidinone moiety, were purified recently from the Red Sea sponge Latrunculia magnifica. The effects of these toxins on cultured mouse neuroblastoma and fibroblast cells have been evaluated. In both types of cells, submicromolar toxin concentrations rapidly induce striking changes in cell morphology that are reversible upon removal of the toxin. Immunofluorescence studies with antibodies specific for cytoskeletal proteins reveal that the toxins cause major alterations in the organization of microfilaments without obvious effects on the organization of the microtubular system.

Stay Connected to Science