Microtubule Stabilizing Drugs
Microtubule Stabilizing Drugs - Related Videos
01:15
Drugs that Stabilize Microtubules
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2023
Microtubules are dynamic structures that undergo cycles of catastrophe and rescue. The microtubules play a central role in cell division by forming the spindle apparatus for segregating the chromosomes. This makes them ideal targets for regulating dividing cells in tumors and malignant cancer cells. Microtubule stabilizing drugs help stabilize the microtubule formation and promote its polymerization. Paclitaxel was the first microtubule stabilizing agent used as anticancer drug in chemotherapy...
01:10
Drugs that Destabilize Microtubules
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2023
Microtubules are dynamic structures and can be regulated by microtubule targeting agents (MTAs). Microtubule destabilizing drugs are a class of MTAs that destabilize and prevent microtubules' polymerization. Both natural and synthetic chemicals can be found under this class of drugs. Vincristine and vinblastine, two vinca alkaloids, and colchicine were among the first to be discovered. These drugs can affect cells in various ways, either by inducing a change in cell morphology, preventing...
01:16
Drug Product Stability
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2025
The long-term stability of drug products is critical to ensuring their quality, safety, and effectiveness over time. Stability directly influences a product's ability to maintain its intended characteristics, ensuring it performs as expected during its intended shelf life. Key attributes such as drug potency, impurities, dissolution, and other physicochemical measures of performance are tested to assess stability. These parameters indicate how well the product retains its quality over time and...
12:20
Preparation of Segmented Microtubules to Study Motions Driven by the Disassembling Microtubule Ends
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Cited by 24 •
2014
Microtubules are inherently unstable polymers, and their switching between growth and shortening is stochastic and difficult to control. Here we describe protocols using segmented microtubules with photoablatable stabilizing caps. Depolymerization of segmented microtubules can be triggered with high temporal and spatial resolution, thereby assisting analysis of motions with the disassembling microtubule ends.
04:28
Microtubule Binding Assay in CRC Cells: A Method to Examine Microtubule Binding Tau Protein in Colorectal Cancer Cells
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2023
This video describes the microtubule-binding assay used to separate the microtubule-binding tau protein from non-binding hyperphosphorylated tau protein fractions in colorectal cancer cells. This assay helps determine the effect of various chemicals that can alter the phosphorylation status of tau protein, affecting its microtubule binding.
FAQs
These compounds bind to tubulin or microtubule-associated sites and increase or maintain microtubule structures. Their central effect is to suppress the normal cycles of microtubule growth and shrinkage, so the cytoskeleton becomes less dynamically remodeled. This altered behavior helps explain changes in cellular organization, transport, and chromosome segregation.
Mitotic spindle function depends on properly regulated microtubule behavior. When a drug suppresses the normal growth and shrinkage cycles, the spindle can no longer operate normally, disrupting chromosome segregation. Rapidly dividing cells may consequently become arrested during mitosis, making this mechanism important both for studying cell division and for cancer treatment.
Rapidly dividing cells repeatedly assemble and use mitotic spindles, so interference with microtubule dynamics directly affects their progression through mitosis. Stabilizing compounds can therefore produce mitotic arrest in these cells. This relationship connects cytoskeletal regulation with research on how cell division is controlled and how therapies affect proliferating cell populations.
Their effects on microtubule behavior and chromosome segregation provide experimental ways to examine how cells respond when mitosis is disrupted. Researchers can use these compounds to investigate drug resistance, including why treatment effects may change, and chromosome instability, which is associated with errors in the normal segregation process.
Taxanes, including paclitaxel and docetaxel, use microtubule stabilization as part of their anticancer action. By suppressing the microtubule dynamics required for normal mitotic spindle function, they can arrest rapidly dividing cells during mitosis. Their clinical relevance comes from connecting a cytoskeletal mechanism with the control of cancer cell division.
Researchers use related compounds as tools for examining cytoskeletal dynamics and cell division. Observing how stabilized microtubules affect organization, transport, spindle function, and chromosome segregation can reveal how these processes depend on regulated remodeling. The same experimental context also supports studies of drug resistance and strategies for developing more selective therapies.