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The structure of paclitaxel, a widely used mitotic inhibitor. A mitotic inhibitor, microtubule inhibitor, or tubulin inhibitor, is a drug that inhibits mitosis, or cell division, and is used in treating cancer, gout, and nail fungus. These drugs disrupt microtubules, which are structures that pull the chromosomes apart when a cell divides.
Early Mitotic Inhibitor 1 (EMI1) is an important cell cycle regulator which ensures timely mitotic entry by primarily inhibiting Anaphase-Promoting Complex/Cyclosome (APC/C) activity. This protein is present in many organisms including Xenopus, Zebrafish, Drosophila (homologous protein: Rca1), and Humans (also often known as F-box only protein ...
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Thus, in essence, taxanes are mitotic inhibitors. In contrast to the taxanes, the vinca alkaloids prevent mitotic spindle formation through inhibition of tubulin polymerization. Both taxanes and vinca alkaloids are, therefore, named spindle poisons or mitosis poisons, but they act in different ways. Taxanes are also thought to be radiosensitizing.
Monomethyl auristatin E is an antimitotic agent which inhibits cell division by blocking the polymerisation of tubulin.The linker to the monoclonal antibody is stable in extracellular fluid, but is cleaved by cathepsin once the conjugate has entered a tumor cell, thus activating the antimitotic mechanism.
The discovery of the Wee1 gene is accredited to Paul Nurse, who first identified it in fission yeast (Schizosaccharomyces pombe) in 1978. In his initial experiments, Nurse demonstrated Wee1 to be a negative regulator of mitosis, such that Wee1+ activity was critical in preventing premature mitosis in Cdc25+ (a mitotic inducer) yeast cells and increased Wee1+ expression could further delay cell ...
Nocodazole is an antineoplastic agent which exerts its effect in cells by interfering with the polymerization of microtubules. [1] Microtubules are one type of fibre which constitutes the cytoskeleton, and the dynamic microtubule network has several important roles in the cell, including vesicular transport, forming the mitotic spindle and in cytokinesis.
Vinca alkaloids are used in chemotherapy for cancer. They are a class of cell cycle–specific cytotoxic drugs that work by inhibiting the ability of cancer cells to divide: Acting upon tubulin, they prevent it from forming into microtubules, a necessary component for cellular division. [13]