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Neurosci Lett. 1998 Dec 11;258(1):41-4.

Expression of calcitonin receptor-like receptor and receptor-activity-modifying proteins in human cranial arteries.

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Department of Pharmacology, The Royal Danish School of Pharmacy, Copenhagen.


Recently a new type of proteins modulating the pharmacological profile of the calcitonin receptor-like receptor (CRLR) were identified. The receptor-activity-modifying proteins (RAMPs) were shown to be essential for the expression of a functional CRLR and furthermore the RAMPs seemed to modify ligand selectivity of CRLR: coexpression of CRLR and RAMP1 resulted in a CGRP1 type of receptor while an adrenomedullin receptor resulted when CRLR and RAMP2 were coexpressed. In the present study significant molecular expression of CRLR concomitant with RAMP1, 2 and 3 were demonstrated in human meningeal, cerebral and temporal arteries by use of reverse transcriptase polymerase chain reactions (RT-PCR). These findings support previous studies demonstrating functional CGRP1 receptors in human cranial arteries. Furthermore the present study suggests the potential for functional adrenomedullin receptors in human cranial arteries.

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