Nestin is a type VI intermediate filament protein encoded by the NES gene. It is primarily expressed in neural stem and progenitor cells during development and in adult neurogenic regions. [@reynolds1992] Nestin serves as a structural scaffold for neural progenitor cells during proliferation and differentiation, and plays important roles in cytoskeletal organization, cell signaling, and tissue repair following CNS injury. [@wiese2004]
Nestin is a type VI intermediate filament protein encoded by the NES gene. It is primarily expressed in neural stem and progenitor cells during development and in adult neurogenic regions. [@reynolds1992] Nestin serves as a structural scaffold for neural progenitor cells during proliferation and differentiation, and plays important roles in cytoskeletal organization, cell signaling, and tissue repair following CNS injury. [@wiese2004]
Structure
Nestin is a type VI intermediate filament protein characterized by a highly conserved central rod domain flanked by unique N-terminal and C-terminal domains. [@lendahl1990] The protein contains multiple phosphorylation sites that regulate its assembly and disassembly, particularly during the cell cycle. [@sahlgren2003] Nestin's structure differs from other IF proteins, with a shorter rod domain and highly charged terminal domains that mediate protein-protein interactions. [@michalczyk2005]
Normal Function in the Nervous System
Neurogenesis
Nestin serves as a structural scaffold for neural progenitor cells during proliferation and differentiation. [@wiese2004]
Cytoskeletal Organization
Co-assembles with vimentin and other intermediate filaments in developing neurons. [@eliasson1999]
Cell Signaling
Interacts with various kinases and phosphatases, including PKC and PP2A, to regulate stem cell fate decisions. [@duchateau2008]
Tissue Repair
Activated in reactive astrocytes following CNS injury and neurodegeneration. [@frisen1995]
Role in Neurodegeneration
Alzheimer's Disease
Nestin plays complex roles in AD pathogenesis: [@mohl2006]
Astrocytic nestin: Reactive astrocytes in AD brain express nestin
Neural stem cells: Nestin+ progenitor cells attempt regeneration in AD
Tau interactions: Nestin interacts with tau pathology [@liu2014]
Parkinson's Disease
Nestin involvement in PD: [@peng2009][@liu2011]
Nestin+ astrocytes in substantia nigra
Response to dopaminergic neuron loss
Potential for regenerative therapy
Amyotrophic Lateral Sclerosis
Nestin alterations in ALS: [@siqueira2014]
Motor neuron involvement
Glial response
Therapeutic potential
CNS Injury and Repair
Nestin is activated following brain injury and may contribute to repair: [@tamaki2012]