Neuronal expression of the human neuropeptide S receptor NPSR1 identifies NPS-induced calcium signaling pathways.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 25714705.
- Also identified by DOI 10.1371/journal.pone.0117319 and PMC identifier 4340626.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
The neuropeptide S (NPS) system was discovered as a novel neurotransmitter system a decade ago and has since been identified as a key player in the modulation of fear and anxiety. Genetic variations of the human NPS receptor (NPSR1) have been associated with pathologies like panic disorders. However, details on the molecular fundamentals of NPSR1 activity in neurons remained elusive. We expressed NPSR1 in primary hippocampal cultures. Using single-cell calcium imaging we found that NPSR1 stimulation induced calcium mobilization from the endoplasmic reticulum via activation of IP3 and ryanodine receptors. Store-operated calcium channels were activated in a downstream process mediating entry of extracellular calcium. We provide the first detailed analysis of NPSR1 activity and the underlying intracellular pathways with respect to calcium mobilization in neurons.
Medical subject headings
- Calcium Signaling
- Gene Expression
- Neurons
- Neuropeptides
- Receptors, G-Protein-Coupled