Rohrer, L. and Raulf, F. and Bruns, C. and Buettner, R. and Hofstaedter, Ferdinand and Schüle, R. (1993) Cloning and characterization of a fourth human somatostatin receptor. Proceedings of the National Academy of Sciences of the United States of America: PNAS 90 (9), pp. 4196-4200.
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We have isolated a gene coding for a fourth human somatostatin (somatotropin release-inhibiting factor) receptor. This additional somatostatin receptor (hSSTR4) is specifically expressed in human fetal and adult brain and lung tissue. The deduced amino acid sequence of the receptor displays both sequence and structural homology to three cloned somatostatin receptors as well as to other members of the family of GTP-binding-protein-coupled seven-helix transmembrane-spanning receptors. Pharmacological characterization of the expressed receptor reveals specific, high-affinity binding of somatostatin 14 and somatostatin 28. Surprisingly, several well-characterized synthetic somatostatin analogs fail to exhibit high-affinity binding to hSSTR4, indicating the existence of pharmacologically different receptor subtypes. Our data suggest that the diverse biological effects exerted by somatostatin are mediated by a family of receptors with discrete patterns of expression and different pharmacological properties.
|Institutions:||Medicine > Lehrstuhl für Pathologie|
|Subjects:||600 Technology > 610 Medical sciences Medicine|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||09 Jun 2010 16:45|
|Last Modified:||09 Jun 2010 16:45|
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