Identification of an NPY-Y1 receptor subtype in bovine chromaffin cells
| Autor: | Terry D. Hexum, Jialin C. Zheng, Roseann L. Vorce, Peijin Zhang |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
endocrine system
Cell type Physiology Chromaffin Cells Clinical Biochemistry CHO Cells Biology Arginine Biochemistry Cellular and Molecular Neuroscience chemistry.chemical_compound Endocrinology Cricetinae mental disorders Cyclic AMP medicine Animals Northern blot Cells Cultured Forskolin Chinese hamster ovary cell Neuropeptide Y receptor Molecular biology humanities Receptors Neuropeptide Y medicine.anatomical_structure chemistry Competitive antagonist Chromaffin cell Cattle Adrenal medulla |
| Zdroj: | Regulatory Peptides. 87:9-13 |
| ISSN: | 0167-0115 |
| DOI: | 10.1016/s0167-0115(99)00093-2 |
| Popis: | Bovine chromaffin cells have been used in a variety of studies designed to reveal different aspects of neuropeptide Y (NPY) action. Pharmacological data have defined five NPY receptor subtypes, only one of which (Y3) has not been cloned. Some studies with bovine chromaffin cells have concluded that the effects of NPY on this cell type are mediated by the Y3 subtype. Previous work from our laboratory demonstrates that a Y1 subtype mediates the effect of NPY in this tissue. In the current studies we provide further evidence for the existence of the Y1 subtype in bovine chromaffin cells. BIBP3226, the selective Y1 antagonist, potently displaces [125I]NPY from its binding site IC50 = 1.91 x 10(-9) M. Moreover, [125I]BIBP3226 binds to bovine chromaffin cell membranes with high affinity (IC50 = 5.9 x 10(-8) M). Examination of BIBP3226 antagonism of NPY inhibition of forskolin stimulated cyclic AMP accumulation reveals that it is a competitive antagonist with a K(B) similar to the IC50 for [125I]BIBP3226 binding. Northern blot analysis using a porcine cDNA clone for the Y1 subtype demonstrates a 3.5-kb mRNA species in chromaffin cells. These data identify the bovine chromaffin cell NPY receptor as a Y1 subtype. |
| Databáze: | OpenAIRE |
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