Microtubule depolymerization in Uromyces appendiculatus by three new antineoplastic drugs: Combretastatin A-4, dolastatin 10 and halichondrin B

Robert Roberson, Bruce Tucker, George Pettit

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Three new antineoplastic natural products, combretastatin A-4, dolastatin 10 and halichondrin B, have been evaluated for their antimicrotubule activity in Uromyces appendiculatus urediniospore germlings using indirect immunofluorescence microscopy. In control germlings microtubules were abundant and mostly oriented parallel to the longitudinal axis of the cell. The microtubule cytoskeleton of germlings treated with 1.3 x 10-5 M (10 μg ml-1) dolastatin 10 and 4.5 x 10-5 M (50 μg ml-1) halichondrin B disrupted the microtubule cytoskeleton resulting in the near elimination of microtubule-associated fluorescence. Combretastatin A-4 was less effective, requiring a concentration of 3.2 x 10-3 M (1.0 mg ml-1) to disrupt the microtubule cytoskeleton. These effective doses are consistent with previously examined antimicrotubule agents (e.g. nocodazole, griseofulvin, vincristine sulphate, demecolcine).

Original languageEnglish (US)
Pages (from-to)378-382
Number of pages5
JournalMycological Research
Volume102
Issue number3
DOIs
StatePublished - Mar 1998

ASJC Scopus subject areas

  • Biotechnology
  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Plant Science

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