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  • Title: Possible mechanisms of paclitaxel-induced apoptosis.
    Author: Fan W.
    Journal: Biochem Pharmacol; 1999 Jun 01; 57(11):1215-21. PubMed ID: 10230764.
    Abstract:
    Paclitaxel, a naturally occurring antimicrotubule agent, has been demonstrated to possess significant cell-killing activity in a variety of tumor cells through induction of apoptosis. It is currently unclear whether this finding suggests a novel mechanism of action for paclitaxel against tumor cells or just represents an end product of the well-known action of paclitaxel on microtubules and cell cycle arrest. Morphologically, a sustained block of mitosis seems to be required for paclitaxel-induced apoptosis because most apoptotic events are observed to occur in cells showing a prior mitotic arrest. However, this morphological correlation alone does not prove that paclitaxel-induced apoptosis is indeed a secondary event resulting from mitotic arrest. Instead, several lines of evidence obtained from recent studies have suggested that apoptotic cell death induced by paclitaxel may occur via a signaling pathway independent of microtubules and G2/M arrest.
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