neurogranin
Pronunciation: NYUR-oh-gran-in
A postsynaptic protein that regulates calcium-calmodulin signaling and serves as a cerebrospinal fluid biomarker for neurodegeneration.
Full Definition
Neurogranin is a small, brain-specific protein primarily located in dendritic spines of cortical and hippocampal neurons, where it modulates calcium-calmodulin-dependent protein kinase II activity. This protein plays a crucial role in synaptic plasticity, long-term potentiation, and memory formation by regulating calcium-calmodulin availability at the synapse. In clinical neuroendocrinology, neurogranin has emerged as a promising cerebrospinal fluid biomarker for synaptic dysfunction and neurodegeneration, particularly in Alzheimer's disease and other neurodegenerative conditions. Elevated CSF neurogranin levels correlate with cognitive decline and can complement traditional biomarkers like tau and amyloid-beta in diagnostic workups.
Usage
Usage note: Specify measurement context (CSF vs. brain tissue) as clinical relevance differs significantly.
In Context
- "Cerebrospinal fluid neurogranin concentrations were significantly elevated in patients with mild cognitive impairment." — Neurological research study
- "The combination of tau, amyloid-beta, and neurogranin provided improved diagnostic accuracy for Alzheimer's disease." — Biomarker validation study