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	'''~~Nociceptin~~ receptor''', also known as '''~~ORL1~~''', is a protein that ~~in humans~~ is encoded by the ~~'''~~OPRL1~~'''~~ gene. It is a member of the opioid family ~~of G~~-~~protein~~-~~coupled receptors~~. ~~The~~ nociceptin receptor is ~~widely distributed~~ in the ~~central nervous system where it plays~~ a ~~role in pain and stress responses~~, ~~as well as~~ in the ~~regulation~~ of ~~food intake~~.		== Nociceptin Receptor ==

			[[File:8F7X_Nociceptin_receptor.png\|thumb\|right\|Structure of the nociceptin receptor]]

			The '''nociceptin receptor''', also known as the '''opioid receptor-like 1''' ('''ORL-1'''), is a [[G protein-coupled receptor]] (GPCR) that is encoded by the [[OPRL1]] gene in humans. It is a member of the opioid receptor family, which includes the [[mu-opioid receptor]], [[delta-opioid receptor]], and [[kappa-opioid receptor]]. However, the nociceptin receptor is unique in that it does not bind traditional opioid peptides but instead binds the endogenous peptide [[nociceptin]], also known as orphanin FQ.

			== Structure ==

			The nociceptin receptor is a typical GPCR with seven transmembrane domains. It shares significant sequence homology with other opioid receptors but has distinct pharmacological properties. The receptor is coupled to [[G proteins]] that inhibit [[adenylate cyclase]], leading to a decrease in the intracellular concentration of [[cyclic AMP]].

	== Function ==		== Function ==

	The nociceptin receptor is ~~a G protein~~-~~coupled receptor that binds~~ the ~~peptide~~ [[~~nociceptin~~]]. Nociceptin and its receptor ~~system are involved~~ in ~~numerous biological functions, including~~ pain, ~~stress~~, ~~and anxiety responses~~, ~~as well as drug abuse and reward~~. ~~The nociceptin~~ receptor ~~system is also involved in~~ the ~~regulation~~ of ~~locomotor activity~~ and ~~cognitive processes~~.		The primary function of the nociceptin receptor is to modulate pain and analgesia. Unlike classical opioid receptors, activation of the nociceptin receptor by its ligand, nociceptin, can produce both analgesic and anti-analgesic effects depending on the context and location within the [[central nervous system]].

			=== Pain Modulation ===

			Nociceptin and its receptor play a complex role in pain modulation. In some cases, activation of the nociceptin receptor can lead to analgesia, while in others, it can enhance pain perception. This dual role is thought to be due to the receptor's ability to modulate the release of other neurotransmitters and interact with other pain pathways.

			=== Other Functions ===

	~~== Clinical significance ==~~		Beyond pain modulation, the nociceptin receptor is involved in a variety of physiological processes, including:

	~~Alterations in the nociceptin receptor system have been implicated in a variety~~ of ~~disorders, including~~ [[~~chronic pain~~]], [[anxiety ~~disorders~~]], [[~~depression~~]], and [[~~drug~~ addiction]]~~. As such, the nociceptin receptor represents a promising target for the development of novel therapeutics for these conditions.~~		* Regulation of [[mood]] and [[anxiety]]
			* Control of [[appetite]] and [[food intake]]
			* Modulation of [[reward]] and [[addiction]] pathways
			* Influence on [[cardiovascular]] and [[respiratory]] functions

	== ~~Pharmacology~~ ==		== Ligands ==

	~~Several synthetic ligands~~ for the nociceptin receptor have been developed, including agonists, antagonists, ~~and partial agonists. These compounds have been~~ used to ~~investigate the role of~~ the ~~nociceptin~~ receptor ~~system in various physiological~~ and ~~pathological processes~~.		The primary endogenous ligand for the nociceptin receptor is [[nociceptin]], a 17-amino acid peptide. Several synthetic ligands have been developed to target the nociceptin receptor, including both agonists and antagonists, which are used in research to explore the receptor's function and potential therapeutic applications.

	== ~~See also~~ ==		== Clinical Significance ==

			The nociceptin receptor is a target of interest for the development of new analgesics that do not have the addictive properties of traditional opioids. Additionally, due to its role in mood regulation, it is being studied for potential treatments for [[depression]] and [[anxiety disorders]].

			== Related Pages ==

	* [[Opioid receptor]]		* [[Opioid receptor]]
	* [[Nociceptin]]		* [[Nociceptin]]
	* [[G protein-coupled receptor]]		* [[G protein-coupled receptor]]
			* [[Pain management]]

	~~== References ==~~		{{Opioid receptor}}

	~~<references />~~

	~~== External links ==~~

	* [http://www.iuphar-db.org/GPCR/ReceptorDisplayForward?receptorID=2401 Nociceptin receptor~~] at the IUPHAR Database~~
	* [https://www.ncbi.nlm.nih.gov/gene/4987 OPRL1] human gene location in the [[UCSC Genome Browser]].
	* [https://www.ncbi.nlm.nih.gov/gene/4987 OPRL1] human gene details in the [[UCSC Genome Browser]].

			[[Category:Opioid receptors]]
	[[Category:G protein-coupled receptors]]		[[Category:G protein-coupled receptors]]
	~~[[Category:Opioid receptors]]~~
	~~[[Category:Human proteins]]~~

	~~{{stub}}~~

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'''Nociceptin receptor''', also known as '''ORL1''', is a protein that in humans is encoded by the '''OPRL1''' gene. It is a member of the opioid family of G-protein-coupled receptors. The nociceptin receptor is widely distributed in the central nervous system where it plays a role in pain and stress responses, as well as in the regulation of food intake.

== Function ==

The nociceptin receptor is a G protein-coupled receptor that binds the peptide [[nociceptin]]. Nociceptin and its receptor system are involved in numerous biological functions, including pain, stress, and anxiety responses, as well as drug abuse and reward. The nociceptin receptor system is also involved in the regulation of locomotor activity and cognitive processes.

== Clinical significance ==

Alterations in the nociceptin receptor system have been implicated in a variety of disorders, including [[chronic pain]], [[anxiety disorders]], [[depression]], and [[drug addiction]]. As such, the nociceptin receptor represents a promising target for the development of novel therapeutics for these conditions.

== Pharmacology ==

Several synthetic ligands for the nociceptin receptor have been developed, including agonists, antagonists, and partial agonists. These compounds have been used to investigate the role of the nociceptin receptor system in various physiological and pathological processes.

== See also ==

* [[Opioid receptor]]
* [[Nociceptin]]
* [[G protein-coupled receptor]]

== References ==

<references />

== External links ==

* [http://www.iuphar-db.org/GPCR/ReceptorDisplayForward?receptorID=2401 Nociceptin receptor] at the IUPHAR Database
* [https://www.ncbi.nlm.nih.gov/gene/4987 OPRL1] human gene location in the [[UCSC Genome Browser]].
* [https://www.ncbi.nlm.nih.gov/gene/4987 OPRL1] human gene details in the [[UCSC Genome Browser]].

[[Category:G protein-coupled receptors]]
[[Category:Opioid receptors]]
[[Category:Human proteins]]

{{stub}}

Nociceptin receptor - Revision history

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