Intermediate filament (IF)

Intermediate filaments are a major component of the eukaryotic cytoskeleton, providing essential mechanical support and structural stability to cells and tissues. They are composed of a diverse family of proteins, including keratins, vimentin, and neurofilaments, which are expressed in a tissue-specific manner (StatPearls, PMID: 30725699). Beyond their structural role, intermediate filaments are involved in key cellular processes such as signal transduction, organelle positioning, and the regulation of cell motility (Nature Reviews Molecular Cell Biology, PMID: 15340431). Dysregulation or mutation of these proteins is associated with a wide range of human diseases, including skin blistering disorders, cardiomyopathies, and neurodegenerative conditions like Alexander disease (Journal of Clinical Investigation, PMID: 19183787). In cancer, intermediate filaments like vimentin are critical markers of the epithelial-mesenchymal transition (EMT) and are actively investigated as therapeutic targets to prevent tumor metastasis and chemoresistance (Cancer Research, PMID: 20538598). Therapeutic strategies often involve small molecules like Withaferin A, which bind to specific filaments to induce aggregation and disrupt their role in disease progression (PLoS ONE, PMID: 20538598). Additionally, intermediate filaments serve as vital clinical biomarkers, with neurofilament light chain (NfL) and glial fibrillary acidic protein (GFAP) used to monitor neurodegeneration and brain injury (PMID: 32439175, PMID: 30243517).

Other names

Cytoskeletal intermediate filamentNanofilamentCytoplasmic filament

Inhibition of filament assembly, induction of filament reorganization or aggregation, and modulation of post-translational modifications to disrupt cellular functions such as migration and invasion.