總結(jié) |
Neuropeptide Y (NPY) is a 36-amino acid peptide neurotransmitter in the central (CNS) and peripheral nervous systems.1It belongs to the NPY family, together with peptide YY (PYY) and pancreatic polypeptide (PP). NPY is involved in regulation of a broad range of homeostatic functions such as eating behavior, hypertension, and reproduction.2NPY exerts its effects via five receptor subtypes known as the neuropeptide Y receptors (NPYR): Y1(NPY1R), Y2(NPY2R), Y4(NPY4R), Y5(NPY5R), and Y6(NPY6R).2Four of these, Y1, Y2, Y4, and Y5, are expressed in humans.2The NPY receptors belong to the G protein-coupled receptor superfamily whose members share a common structure of seven putative transmembrane domains, an extracellular amino terminus, and a cytoplasmic carboxyl terminus.Activation of these receptors by NPY produces effects on [Ca2+]i, adenylate cyclase, and a number of ion channels.3Based on the high frequency and density of NPY receptors in steroid hormone-producing tumors, the NPY receptors might be of potential use in tumor management.2NPY2R is primarily expressed in neurons as a presynaptic receptor. It is also strongly expressed in epithelia of the visceral tissues, including colon and kidney.4NPY2R is involved in inhibition of neurotransmitter release mediated by NPY.5Release of glutamate, the principal neuroexcitatory transmitter, is inhibited via the NPY2R receptor.6Involvement of NPY2R in feeding behavior was also reported. PYY(3–36), an NPY2R agonist, acts to inhibit feeding via NPY2R.7
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別名 |
Neuropeptide Y receptor type 2, NPY2-R, NPY-Y2 receptor, Y2 receptor, Npy2r
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圖像 |
Western blot analysis of rat hippocampus and rat whole brain lysates:
1, 2. Anti-Neuropeptide Y 2 Receptor antibody ( AMM06644G), (1:200).
3, 4. Anti-Neuropeptide Y 2 Receptor antibody, preincubated with the control peptide antigen.
Expression of Neuropeptide Y 2 Receptor in rat cerebellum
Immunohistochemical staining of frozen section of rat cerebellum using Anti-Neuropeptide Y 2 Receptor antibody ( AMM06644G), (1:100). Neuropeptide Y 2 Receptor (red) is detected in Purkinje cells. B. Nuclei were stained using DAPI as the counterstain. C. Merged image of A. and B.
Expression of NPY 2 R in rat dorsal root ganglion cells
Immunocytochemical staining of rat dorsal root ganglion (DRG) neurons. A, D. A paraformaldehyde-fixed and permeabilized DRG primary culture was stained with Anti-Neuropeptide Y 2 Receptor antibody ( AMM06644G), (1:100) followed by Alexa-555-conjugated goat anti-rabbit secondary antibody. B, E. Nuclear fluorescence staining of cells using the membrane-permeable DNA dye Hoechst 33342. C. Merged images of panels A and B. F. Merged images of panels D and E.
Magnification:
A-C: x20
E-F: x100
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