Overview
- Peptide (C)DVIEKRKFNHNSN, corresponding to amino acid residues 168-180 of rat 5-Hydroxytryptamine receptor 4 (Accession Q62758). 2nd extracellular loop.
- Rat brain lysate (1:200-1:1000).
Western blot analysis of rat brain lysate:1. Anti-5HT4 Receptor (HTR4) (extracellular) Antibody (#ASR-036), (1:200).
2. Anti-5HT4 Receptor (HTR4) (extracellular) Antibody, preincubated with 5HT4 Receptor/HTR4 (extracellular) Blocking Peptide (#BLP-SR036).
- Rat pheochromocytoma (PC12) cells (1:100).
5-hydroxytryptamine receptor 4 (5-HT4 receptors) are a subclass among the large family of receptors mediating serotonin actions at central and peripheral targets. 5-HT4 receptor activation has been implicated in learning and memory, feeding control and stress response. 5-HT4 receptors are encoded by a complex gene which in humans, generates ten different splice variants1, 2.
The 5-HT4 receptor, a member of the seven transmembrane spanning G-protein-coupled receptors (GPCRs), couples via Gs to increase cAMP production. GPCRs share a similar topology, with seven transmembrane helices (TMHs) connected by three extracellular loops (ECLs), and three intracellular loops (ICLs); the N-terminus is on the extracellular side of the membrane, and the C-terminus is on the cytoplasmic side3.
Within the central nervous system, these receptors are expressed in limbic structures including: hypothalamus, nucleus accumbens, prefrontal cortex, amygdala and hippocampus, where they contribute to emotional and cognitive functions4.
Low levels of 5-HT4 receptors are associated with numerous neuropsychiatric disorders including Alzheimer's disease, Huntington’s disease, feeding disorders and stress-related disorders such as anxiety and depression5.
