SNAP-25
Pronunciation: SNAP-twenty-five
Also written as: SNAP-25 — Synaptosomal-Associated Protein of 25 kDa
Synaptosomal-associated protein of 25 kDa, used as a presynaptic marker in neuropathological studies.
Full Definition
SNAP-25 (Synaptosomal-Associated Protein of 25 kDa) is a key component of the SNARE complex essential for synaptic vesicle fusion and neurotransmitter release. In neuropathology, SNAP-25 serves as a valuable presynaptic marker for assessing synaptic density and integrity. Immunohistochemical staining for SNAP-25 reveals the distribution and density of presynaptic terminals throughout brain tissue, making it useful for quantifying synaptic loss in neurodegenerative diseases. Changes in SNAP-25 expression or distribution can indicate synaptic dysfunction and are particularly relevant in conditions such as Alzheimer's disease, where synaptic loss often precedes neuronal death.
Usage
Usage note: Presynaptic marker; useful for quantifying synaptic density changes.
In Context
- "SNAP-25 immunoreactivity was markedly reduced in the affected cortical regions." — Synaptic pathology assessment
- "Quantitative analysis of SNAP-25 staining revealed significant synaptic loss." — Research methodology