P301L is a pathogenic Tau mutation associated with familial frontotemporal dementia and other tauopathies. The mutation can increase the aggregation propensity of Tau and is widely used to study Tau misfolding and pathological aggregation. Recombinant P301L Tau proteins and P301L-containing PFFs can support cell-based, organoid and animal models for investigating Tau aggregation, seeding mechanisms, and potential therapeutic interventions.

Different forms of Tau can be investigated to model distinct aspects of Tau pathology. Recombinant Tau proteins with specific isoforms, disease-associated mutations, or phosphorylation states can be used to study Tau structure, aggregation, and molecular interactions. Phosphorylated Tau antibodies help detect and characterize disease-associated Tau species, while Tau stable cell lines provide cell-based models for studying intracellular Tau aggregation and evaluating potential therapeutic effects.

Tau pre-formed fibrils (PFFs) are widely used as experimental seeds to model pathological Tau aggregation. When introduced into cell, organoid, or animal models, Tau PFFs can promote the recruitment and aggregation of endogenous Tau, enabling researchers to study Tau seeding, intracellular aggregation, and propagation. PFF-based models can also be used to evaluate therapeutic strategies targeting Tau pathology.

Tauopathies are a group of neurodegenerative disorders characterized by abnormal accumulation and aggregation of Tau in the brain. Alzheimer’s disease is the most common tauopathy, while other tauopathies include progressive supranuclear palsy (PSP), corticobasal degeneration (CBD), and frontotemporal lobar degeneration (FTLD) with Tau pathology. Different tauopathies are associated with distinct Tau isoforms, post-translational modifications, and aggregation patterns.

Tau is a microtubule-associated protein predominantly expressed in neurons, where it helps regulate microtubule stability and organization, particularly in axons. Tau function is regulated by post-translational modifications, including phosphorylation. Abnormal Tau modification, misfolding, and aggregation can disrupt neuronal function and contribute to neurodegenerative disease.