Microtubule and microtubule-associated protein (MT and MAP) (MT and MAP)

Microtubules are dynamic cytoskeletal polymers composed of alpha- and beta-tubulin heterodimers that are essential for maintaining cell architecture, facilitating intracellular transport, and ensuring accurate chromosome segregation during mitosis (StatPearls, 2023). Microtubule-associated proteins (MAPs) further regulate the assembly, stability, and spatial organization of these filaments, often serving as tracks for molecular motors like kinesin and dynein (Nature Reviews Molecular Cell Biology, 2018). In oncology, microtubules are a validated therapeutic target; drugs such as taxanes stabilize the polymers, while vinca alkaloids inhibit their polymerization, both leading to cell cycle arrest and apoptosis (Journal of Cell Science, 2014). Beyond cancer, the dysfunction of MAPs, most notably the Tau protein, is central to the pathogenesis of neurodegenerative disorders like Alzheimer's disease (Frontiers in Aging Neuroscience, 2020). However, targeting the microtubule system is associated with significant clinical challenges, particularly chemotherapy-induced peripheral neuropathy, which arises from the disruption of long-distance axonal transport in neurons (Brain, 2019). Emerging research also explores the role of microtubule dynamics in immune cell signaling and viral entry, expanding the potential therapeutic landscape (Frontiers in Cell and Developmental Biology, 2021). The structural diversity of tubulin isotypes and the variety of MAPs provide opportunities for developing more selective agents with improved safety profiles (Nature Reviews Drug Discovery, 2022).

Other names

TubulinCytoskeletal microtubuleMicrotubule-associated proteinMicrotubular system

Microtubule stabilization or destabilization leading to mitotic arrest and inhibition of intracellular transport.