Neurokinin A (Nk2) Receptor Neurons is an important cell type in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Neurokinin A (NK2) Receptor Neurons are neurons expressing the NK2 receptor, a member of the Tachykinin receptor family. These receptor neurons play crucial roles in smooth muscle contraction, gut motility and are implicated in various neurological and neurodegenerative conditions. [1]
| Taxonomy | ID | Name / Label |
|---|---|---|
| Cell Ontology (CL) | CL:0000197 | sensory receptor cell |
| Property | Value | [2]
|----------|-------|
| Receptor Type | NK2 (TACR2) |
| Family | Tachykinin (Neurokinin) |
| Signaling Mechanism | Gq protein-coupled, activates phospholipase C |
| Primary Location | Hippocampus, cortex, peripheral nervous system |
| Agonists | Neurokinin A (NKA), Substance P (lower affinity) |
| Antagonists | GR-159897, SR-48968 (NK2 selective) |
Neurokinin A (NK2) Receptor Neurons are neurons expressing the NK2 receptor, a member of the Tachykinin receptor family. These receptor neurons play crucial roles in smooth muscle contraction, gut motility, neuroinflammation, and are implicated in Alzheimer's disease, Parkinson's disease, and irritable bowel syndrome.
The NK2 receptor signals through Gq protein-coupled mechanisms, activating phospholipase C:
| Region | NK2 Expression | Functional Role |
|---|---|---|
| Hippocampus | Moderate | Memory consolidation |
| Cerebral cortex | Moderate | Cognitive processing |
| Enteric nervous system | High | Gut motility regulation |
| Bladder | High | Micturition control |
| Bronchi | High | Bronchoconstriction |
NK2 receptor neurons are implicated in several conditions:
The tachykinin family includes:
NK2 receptors are widely distributed in both CNS and PNS, with distinct roles in neuroinflammation, pain transmission, and autonomic regulation.
| Compound | Status | Indication |
|---|---|---|
| GR-159897 | Research | Pain, anxiety |
| SR-48968 | Clinical trials | IBS, bladder dysfunction |
| nepicastat | Preclinical | Neuroprotection |
The study of Neurokinin A (Nk2) Receptor Neurons has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.