Neuronal pentraxin-1 (NPTX1)

Neuronal pentraxin-1 (NPTX1) is a secreted glycoprotein (~47 kDa, 432 amino acids) primarily expressed in the brain, notably in the cerebral cortex, hippocampus, and cerebellum[1][4][6]. It is a member of the pentraxin protein family, functioning as a synaptic organizer involved in the regulation of synaptic plasticity, density, and apoptotic mechanisms. NPTX1 participates in homeostatic synaptic function by influencing synapse formation, remodeling, synaptic pruning, and excitatory-inhibitory balance, chiefly via AMPA receptor recruitment and complement activation. Altered NPTX1 levels or function have been implicated in various neurodegenerative diseases including late-stage Parkinson's disease, Alzheimer's disease, and autosomal dominant cerebellar ataxia, where NPTX1 disruption contributes to synaptic pathology and neuronal degeneration. No direct therapeutic agents target NPTX1, but synthetic synaptic organizer proteins based on NPTX1 domains have been explored in preclinical studies for synaptic repair[1][2][5][6].

Other names

Neuronal pentraxin INP1NP-ISCA50neuronal pentraxin-1

Not established for approved drugs; synthetic molecules (e.g., CPTX) designed to mimic or enhance NPTX1 function can organize synaptic connections by bridging presynaptic neurexins and postsynaptic AMPA receptors[5].