Antinociceptive effects of spinally administered nociceptin/orphanin FQ and its N-terminal fragments on capsaicin-induced nociception

► Intrathecal injection of N/OFQ caused a dose-dependent antinociceptive effect. ► The N-terminal fragments of N/OFQ were antinociceptive with a potency lower than N/OFQ. ► Antinociceptive effect of N/OFQ (1–13) and (1–11) lasted longer than that of N/OFQ. ► N/OFQ (1–13)-induced antinociception is m...

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Veröffentlicht in:Peptides (New York, N.Y. : 1980) N.Y. : 1980), 2011-07, Vol.32 (7), p.1530-1535
Hauptverfasser: Katsuyama, Soh, Mizoguchi, Hirokazu, Komatsu, Takaaki, Sakurada, Chikai, Tsuzuki, Minoru, Sakurada, Shinobu, Sakurada, Tsukasa
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container_end_page 1535
container_issue 7
container_start_page 1530
container_title Peptides (New York, N.Y. : 1980)
container_volume 32
creator Katsuyama, Soh
Mizoguchi, Hirokazu
Komatsu, Takaaki
Sakurada, Chikai
Tsuzuki, Minoru
Sakurada, Shinobu
Sakurada, Tsukasa
description ► Intrathecal injection of N/OFQ caused a dose-dependent antinociceptive effect. ► The N-terminal fragments of N/OFQ were antinociceptive with a potency lower than N/OFQ. ► Antinociceptive effect of N/OFQ (1–13) and (1–11) lasted longer than that of N/OFQ. ► N/OFQ (1–13)-induced antinociception is mediated through spinal NOP receptors. Nociceptin/orphanin FQ (N/OFQ), the endogenous ligand for the N/OFQ peptide (NOP) receptors, has been shown to be metabolized into some fragments. We examined to determine whether intrathecal (i.t.) N/OFQ (1–13), (1–11) and (1–7) have antinociceptive activity in the pain-related behavior after intraplantar injection of capsaicin. The i.t. administration of N/OFQ (0.3–1.2nmol) produced an appreciable and dose-dependent inhibition of capsaicin-induced paw-licking/biting response. The N-terminal fragments of N/OFQ, (1–13) and (1–11), were antinociceptive with a potency lower than N/OFQ. Calculated ID50 values (nmol, i.t.) were 0.83 for N/OFQ, 2.5 for N/OFQ (1–13) and 4.75 for N/OFQ (1–11), respectively. The time-course effect revealed that the antinociceptive effects of these N-terminal fragments lasted longer than those of N/OFQ. Removal of amino acids down to N/OFQ (1–7) led to be less potent than N/OFQ and its fragments, (1–13) and (1–11). Antinociception induced by N/OFQ or N/OFQ (1–13) was reversed significantly by i.t. co-injection of [Nphe1]N/OFQ (1–13)NH2, a peptidergic antagonist for NOP receptors, whereas i.t. injection of the antagonist did not interfere with the action of N/OFQ (1–11) and (1–7). Pretreatment with the opioid receptor antagonist naloxone hydrochloride did not affect the antinociception induced by N/OFQ and its N-terminal fragments. These results suggest that N-terminal fragments of N/OFQ are active metabolites and may modulate the antinociceptive effect of N/OFQ in the spinal cord. The results also indicate that N/OFQ (1–13) still possess antinociceptive activity through NOP receptors.
doi_str_mv 10.1016/j.peptides.2011.05.028
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Nociceptin/orphanin FQ (N/OFQ), the endogenous ligand for the N/OFQ peptide (NOP) receptors, has been shown to be metabolized into some fragments. We examined to determine whether intrathecal (i.t.) N/OFQ (1–13), (1–11) and (1–7) have antinociceptive activity in the pain-related behavior after intraplantar injection of capsaicin. The i.t. administration of N/OFQ (0.3–1.2nmol) produced an appreciable and dose-dependent inhibition of capsaicin-induced paw-licking/biting response. The N-terminal fragments of N/OFQ, (1–13) and (1–11), were antinociceptive with a potency lower than N/OFQ. Calculated ID50 values (nmol, i.t.) were 0.83 for N/OFQ, 2.5 for N/OFQ (1–13) and 4.75 for N/OFQ (1–11), respectively. The time-course effect revealed that the antinociceptive effects of these N-terminal fragments lasted longer than those of N/OFQ. Removal of amino acids down to N/OFQ (1–7) led to be less potent than N/OFQ and its fragments, (1–13) and (1–11). Antinociception induced by N/OFQ or N/OFQ (1–13) was reversed significantly by i.t. co-injection of [Nphe1]N/OFQ (1–13)NH2, a peptidergic antagonist for NOP receptors, whereas i.t. injection of the antagonist did not interfere with the action of N/OFQ (1–11) and (1–7). Pretreatment with the opioid receptor antagonist naloxone hydrochloride did not affect the antinociception induced by N/OFQ and its N-terminal fragments. These results suggest that N-terminal fragments of N/OFQ are active metabolites and may modulate the antinociceptive effect of N/OFQ in the spinal cord. The results also indicate that N/OFQ (1–13) still possess antinociceptive activity through NOP receptors.</description><identifier>ISSN: 0196-9781</identifier><identifier>EISSN: 1873-5169</identifier><identifier>DOI: 10.1016/j.peptides.2011.05.028</identifier><identifier>PMID: 21672568</identifier><identifier>CODEN: PPTDD5</identifier><language>eng</language><publisher>New York, NY: Elsevier Inc</publisher><subject>Amino acids ; analgesic effect ; Analgesics ; Analgesics - chemical synthesis ; Analgesics - pharmacology ; Analgesics - therapeutic use ; Animals ; antagonists ; Antinociception ; Behavior, Animal ; Biological and medical sciences ; capsaicin ; Capsaicin - adverse effects ; Capsaicin - pharmacology ; Capsaicin-induced nociception ; dose response ; Dose-Response Relationship, Drug ; Drug Interactions ; Fragments ; Fundamental and applied biological sciences. Psychology ; Inhibitory Concentration 50 ; injection ; Injections, Spinal ; Injections, Subcutaneous ; Ligands ; Male ; Mathematical analysis ; Medical sciences ; Metabolites ; Mice ; Mice, Inbred Strains ; N-Terminal fragments of N/OFQ ; N/OFQ peptide (NOP) receptor ; naloxone ; Naloxone - pharmacology ; Narcotic Antagonists - pharmacology ; Neuropharmacology ; Nociceptin ; Nociceptin/orphanin FQ (N/OFQ) ; nociception ; Opioid Peptides - chemical synthesis ; Opioid Peptides - pharmacology ; Opioid Peptides - therapeutic use ; Pain - drug therapy ; Pain - physiopathology ; Pain Measurement - drug effects ; Pain Measurement - psychology ; Pain Perception - drug effects ; Pain Perception - physiology ; Peptide Fragments - chemical synthesis ; Peptide Fragments - pharmacology ; Peptide Fragments - therapeutic use ; Peptides ; Pharmacology. Drug treatments ; Receptors ; Receptors, Opioid - metabolism ; Somesthesis and somesthetic pathways (proprioception, exteroception, nociception); interoception; electrolocation. Sensory receptors ; Spinal cord ; Spinal Cord - drug effects ; Spinal Cord - physiology ; Structure-Activity Relationship ; Vertebrates: endocrinology ; Vertebrates: nervous system and sense organs</subject><ispartof>Peptides (New York, N.Y. : 1980), 2011-07, Vol.32 (7), p.1530-1535</ispartof><rights>2011 Elsevier Inc.</rights><rights>2015 INIST-CNRS</rights><rights>Copyright © 2011 Elsevier Inc. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c552t-b7c16e9966c2bdbd72fc6e845140cc7bcffd21ade20a680a0f8353cf7f41a9313</citedby><cites>FETCH-LOGICAL-c552t-b7c16e9966c2bdbd72fc6e845140cc7bcffd21ade20a680a0f8353cf7f41a9313</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0196978111002245$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=24388107$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21672568$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Katsuyama, Soh</creatorcontrib><creatorcontrib>Mizoguchi, Hirokazu</creatorcontrib><creatorcontrib>Komatsu, Takaaki</creatorcontrib><creatorcontrib>Sakurada, Chikai</creatorcontrib><creatorcontrib>Tsuzuki, Minoru</creatorcontrib><creatorcontrib>Sakurada, Shinobu</creatorcontrib><creatorcontrib>Sakurada, Tsukasa</creatorcontrib><title>Antinociceptive effects of spinally administered nociceptin/orphanin FQ and its N-terminal fragments on capsaicin-induced nociception</title><title>Peptides (New York, N.Y. : 1980)</title><addtitle>Peptides</addtitle><description>► Intrathecal injection of N/OFQ caused a dose-dependent antinociceptive effect. ► The N-terminal fragments of N/OFQ were antinociceptive with a potency lower than N/OFQ. ► Antinociceptive effect of N/OFQ (1–13) and (1–11) lasted longer than that of N/OFQ. ► N/OFQ (1–13)-induced antinociception is mediated through spinal NOP receptors. Nociceptin/orphanin FQ (N/OFQ), the endogenous ligand for the N/OFQ peptide (NOP) receptors, has been shown to be metabolized into some fragments. We examined to determine whether intrathecal (i.t.) N/OFQ (1–13), (1–11) and (1–7) have antinociceptive activity in the pain-related behavior after intraplantar injection of capsaicin. The i.t. administration of N/OFQ (0.3–1.2nmol) produced an appreciable and dose-dependent inhibition of capsaicin-induced paw-licking/biting response. The N-terminal fragments of N/OFQ, (1–13) and (1–11), were antinociceptive with a potency lower than N/OFQ. Calculated ID50 values (nmol, i.t.) were 0.83 for N/OFQ, 2.5 for N/OFQ (1–13) and 4.75 for N/OFQ (1–11), respectively. The time-course effect revealed that the antinociceptive effects of these N-terminal fragments lasted longer than those of N/OFQ. Removal of amino acids down to N/OFQ (1–7) led to be less potent than N/OFQ and its fragments, (1–13) and (1–11). Antinociception induced by N/OFQ or N/OFQ (1–13) was reversed significantly by i.t. co-injection of [Nphe1]N/OFQ (1–13)NH2, a peptidergic antagonist for NOP receptors, whereas i.t. injection of the antagonist did not interfere with the action of N/OFQ (1–11) and (1–7). Pretreatment with the opioid receptor antagonist naloxone hydrochloride did not affect the antinociception induced by N/OFQ and its N-terminal fragments. These results suggest that N-terminal fragments of N/OFQ are active metabolites and may modulate the antinociceptive effect of N/OFQ in the spinal cord. The results also indicate that N/OFQ (1–13) still possess antinociceptive activity through NOP receptors.</description><subject>Amino acids</subject><subject>analgesic effect</subject><subject>Analgesics</subject><subject>Analgesics - chemical synthesis</subject><subject>Analgesics - pharmacology</subject><subject>Analgesics - therapeutic use</subject><subject>Animals</subject><subject>antagonists</subject><subject>Antinociception</subject><subject>Behavior, Animal</subject><subject>Biological and medical sciences</subject><subject>capsaicin</subject><subject>Capsaicin - adverse effects</subject><subject>Capsaicin - pharmacology</subject><subject>Capsaicin-induced nociception</subject><subject>dose response</subject><subject>Dose-Response Relationship, Drug</subject><subject>Drug Interactions</subject><subject>Fragments</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Inhibitory Concentration 50</subject><subject>injection</subject><subject>Injections, Spinal</subject><subject>Injections, Subcutaneous</subject><subject>Ligands</subject><subject>Male</subject><subject>Mathematical analysis</subject><subject>Medical sciences</subject><subject>Metabolites</subject><subject>Mice</subject><subject>Mice, Inbred Strains</subject><subject>N-Terminal fragments of N/OFQ</subject><subject>N/OFQ peptide (NOP) receptor</subject><subject>naloxone</subject><subject>Naloxone - pharmacology</subject><subject>Narcotic Antagonists - pharmacology</subject><subject>Neuropharmacology</subject><subject>Nociceptin</subject><subject>Nociceptin/orphanin FQ (N/OFQ)</subject><subject>nociception</subject><subject>Opioid Peptides - chemical synthesis</subject><subject>Opioid Peptides - pharmacology</subject><subject>Opioid Peptides - therapeutic use</subject><subject>Pain - drug therapy</subject><subject>Pain - physiopathology</subject><subject>Pain Measurement - drug effects</subject><subject>Pain Measurement - psychology</subject><subject>Pain Perception - drug effects</subject><subject>Pain Perception - physiology</subject><subject>Peptide Fragments - chemical synthesis</subject><subject>Peptide Fragments - pharmacology</subject><subject>Peptide Fragments - therapeutic use</subject><subject>Peptides</subject><subject>Pharmacology. Drug treatments</subject><subject>Receptors</subject><subject>Receptors, Opioid - metabolism</subject><subject>Somesthesis and somesthetic pathways (proprioception, exteroception, nociception); interoception; electrolocation. Sensory receptors</subject><subject>Spinal cord</subject><subject>Spinal Cord - drug effects</subject><subject>Spinal Cord - physiology</subject><subject>Structure-Activity Relationship</subject><subject>Vertebrates: endocrinology</subject><subject>Vertebrates: nervous system and sense organs</subject><issn>0196-9781</issn><issn>1873-5169</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqFkctu1TAQhi0EoofCKxRvULtJ6nESX3ZUFQWkCoSga8vxpfgocYKdU6kPwHvX0TktrGA1m-__ZzQfQidAaiDAzrf17OYlWJdrSgBq0tWEimdoA4I3VQdMPkcbApJVkgs4Qq9y3hJC2laKl-iIAuO0Y2KDfl_EJcTJBLPW3TnsvHdmyXjyOM8h6mG4x9qOIYa8uOQsfoLj-ZTmnzqGiK--YR0tDiX3pSrYuAaxT_p2dHEti9joOetgQqxCtDvzd9EUX6MXXg_ZvTnMY3Rz9eHH5afq-uvHz5cX15XpOrpUPTfAnJSMGdrb3nLqDXOi7aAlxvDeeG8paOso0UwQTbxousZ47lvQsoHmGJ3ue-c0_dq5vKgxZOOGQUc37bKShMtG0pYW8uyfJHBGgVIGbUHZHjVpyjk5r-YURp3uFRC1ylJb9ShLrbIU6VSRVYInhx27fnT2KfZopwDvDoDORg_ln9GE_IdrGyGA8MK93XNeT0rfpsLcfC-bWDEODaGkEO_3hCvfvQsuqWyCi0VDSEW3slP437UPmQPCkg</recordid><startdate>20110701</startdate><enddate>20110701</enddate><creator>Katsuyama, Soh</creator><creator>Mizoguchi, Hirokazu</creator><creator>Komatsu, Takaaki</creator><creator>Sakurada, Chikai</creator><creator>Tsuzuki, Minoru</creator><creator>Sakurada, Shinobu</creator><creator>Sakurada, Tsukasa</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>FBQ</scope><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20110701</creationdate><title>Antinociceptive effects of spinally administered nociceptin/orphanin FQ and its N-terminal fragments on capsaicin-induced nociception</title><author>Katsuyama, Soh ; Mizoguchi, Hirokazu ; Komatsu, Takaaki ; Sakurada, Chikai ; Tsuzuki, Minoru ; Sakurada, Shinobu ; Sakurada, Tsukasa</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c552t-b7c16e9966c2bdbd72fc6e845140cc7bcffd21ade20a680a0f8353cf7f41a9313</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Amino acids</topic><topic>analgesic effect</topic><topic>Analgesics</topic><topic>Analgesics - chemical synthesis</topic><topic>Analgesics - pharmacology</topic><topic>Analgesics - therapeutic use</topic><topic>Animals</topic><topic>antagonists</topic><topic>Antinociception</topic><topic>Behavior, Animal</topic><topic>Biological and medical sciences</topic><topic>capsaicin</topic><topic>Capsaicin - adverse effects</topic><topic>Capsaicin - pharmacology</topic><topic>Capsaicin-induced nociception</topic><topic>dose response</topic><topic>Dose-Response Relationship, Drug</topic><topic>Drug Interactions</topic><topic>Fragments</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Inhibitory Concentration 50</topic><topic>injection</topic><topic>Injections, Spinal</topic><topic>Injections, Subcutaneous</topic><topic>Ligands</topic><topic>Male</topic><topic>Mathematical analysis</topic><topic>Medical sciences</topic><topic>Metabolites</topic><topic>Mice</topic><topic>Mice, Inbred Strains</topic><topic>N-Terminal fragments of N/OFQ</topic><topic>N/OFQ peptide (NOP) receptor</topic><topic>naloxone</topic><topic>Naloxone - pharmacology</topic><topic>Narcotic Antagonists - pharmacology</topic><topic>Neuropharmacology</topic><topic>Nociceptin</topic><topic>Nociceptin/orphanin FQ (N/OFQ)</topic><topic>nociception</topic><topic>Opioid Peptides - chemical synthesis</topic><topic>Opioid Peptides - pharmacology</topic><topic>Opioid Peptides - therapeutic use</topic><topic>Pain - drug therapy</topic><topic>Pain - physiopathology</topic><topic>Pain Measurement - drug effects</topic><topic>Pain Measurement - psychology</topic><topic>Pain Perception - drug effects</topic><topic>Pain Perception - physiology</topic><topic>Peptide Fragments - chemical synthesis</topic><topic>Peptide Fragments - pharmacology</topic><topic>Peptide Fragments - therapeutic use</topic><topic>Peptides</topic><topic>Pharmacology. 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Sensory receptors</topic><topic>Spinal cord</topic><topic>Spinal Cord - drug effects</topic><topic>Spinal Cord - physiology</topic><topic>Structure-Activity Relationship</topic><topic>Vertebrates: endocrinology</topic><topic>Vertebrates: nervous system and sense organs</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Katsuyama, Soh</creatorcontrib><creatorcontrib>Mizoguchi, Hirokazu</creatorcontrib><creatorcontrib>Komatsu, Takaaki</creatorcontrib><creatorcontrib>Sakurada, Chikai</creatorcontrib><creatorcontrib>Tsuzuki, Minoru</creatorcontrib><creatorcontrib>Sakurada, Shinobu</creatorcontrib><creatorcontrib>Sakurada, Tsukasa</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Peptides (New York, N.Y. : 1980)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Katsuyama, Soh</au><au>Mizoguchi, Hirokazu</au><au>Komatsu, Takaaki</au><au>Sakurada, Chikai</au><au>Tsuzuki, Minoru</au><au>Sakurada, Shinobu</au><au>Sakurada, Tsukasa</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Antinociceptive effects of spinally administered nociceptin/orphanin FQ and its N-terminal fragments on capsaicin-induced nociception</atitle><jtitle>Peptides (New York, N.Y. : 1980)</jtitle><addtitle>Peptides</addtitle><date>2011-07-01</date><risdate>2011</risdate><volume>32</volume><issue>7</issue><spage>1530</spage><epage>1535</epage><pages>1530-1535</pages><issn>0196-9781</issn><eissn>1873-5169</eissn><coden>PPTDD5</coden><abstract>► Intrathecal injection of N/OFQ caused a dose-dependent antinociceptive effect. ► The N-terminal fragments of N/OFQ were antinociceptive with a potency lower than N/OFQ. ► Antinociceptive effect of N/OFQ (1–13) and (1–11) lasted longer than that of N/OFQ. ► N/OFQ (1–13)-induced antinociception is mediated through spinal NOP receptors. Nociceptin/orphanin FQ (N/OFQ), the endogenous ligand for the N/OFQ peptide (NOP) receptors, has been shown to be metabolized into some fragments. We examined to determine whether intrathecal (i.t.) N/OFQ (1–13), (1–11) and (1–7) have antinociceptive activity in the pain-related behavior after intraplantar injection of capsaicin. The i.t. administration of N/OFQ (0.3–1.2nmol) produced an appreciable and dose-dependent inhibition of capsaicin-induced paw-licking/biting response. The N-terminal fragments of N/OFQ, (1–13) and (1–11), were antinociceptive with a potency lower than N/OFQ. Calculated ID50 values (nmol, i.t.) were 0.83 for N/OFQ, 2.5 for N/OFQ (1–13) and 4.75 for N/OFQ (1–11), respectively. The time-course effect revealed that the antinociceptive effects of these N-terminal fragments lasted longer than those of N/OFQ. Removal of amino acids down to N/OFQ (1–7) led to be less potent than N/OFQ and its fragments, (1–13) and (1–11). Antinociception induced by N/OFQ or N/OFQ (1–13) was reversed significantly by i.t. co-injection of [Nphe1]N/OFQ (1–13)NH2, a peptidergic antagonist for NOP receptors, whereas i.t. injection of the antagonist did not interfere with the action of N/OFQ (1–11) and (1–7). Pretreatment with the opioid receptor antagonist naloxone hydrochloride did not affect the antinociception induced by N/OFQ and its N-terminal fragments. These results suggest that N-terminal fragments of N/OFQ are active metabolites and may modulate the antinociceptive effect of N/OFQ in the spinal cord. The results also indicate that N/OFQ (1–13) still possess antinociceptive activity through NOP receptors.</abstract><cop>New York, NY</cop><pub>Elsevier Inc</pub><pmid>21672568</pmid><doi>10.1016/j.peptides.2011.05.028</doi><tpages>6</tpages></addata></record>
fulltext fulltext
identifier ISSN: 0196-9781
ispartof Peptides (New York, N.Y. : 1980), 2011-07, Vol.32 (7), p.1530-1535
issn 0196-9781
1873-5169
language eng
recordid cdi_proquest_miscellaneous_907939242
source MEDLINE; Elsevier ScienceDirect Journals
subjects Amino acids
analgesic effect
Analgesics
Analgesics - chemical synthesis
Analgesics - pharmacology
Analgesics - therapeutic use
Animals
antagonists
Antinociception
Behavior, Animal
Biological and medical sciences
capsaicin
Capsaicin - adverse effects
Capsaicin - pharmacology
Capsaicin-induced nociception
dose response
Dose-Response Relationship, Drug
Drug Interactions
Fragments
Fundamental and applied biological sciences. Psychology
Inhibitory Concentration 50
injection
Injections, Spinal
Injections, Subcutaneous
Ligands
Male
Mathematical analysis
Medical sciences
Metabolites
Mice
Mice, Inbred Strains
N-Terminal fragments of N/OFQ
N/OFQ peptide (NOP) receptor
naloxone
Naloxone - pharmacology
Narcotic Antagonists - pharmacology
Neuropharmacology
Nociceptin
Nociceptin/orphanin FQ (N/OFQ)
nociception
Opioid Peptides - chemical synthesis
Opioid Peptides - pharmacology
Opioid Peptides - therapeutic use
Pain - drug therapy
Pain - physiopathology
Pain Measurement - drug effects
Pain Measurement - psychology
Pain Perception - drug effects
Pain Perception - physiology
Peptide Fragments - chemical synthesis
Peptide Fragments - pharmacology
Peptide Fragments - therapeutic use
Peptides
Pharmacology. Drug treatments
Receptors
Receptors, Opioid - metabolism
Somesthesis and somesthetic pathways (proprioception, exteroception, nociception)
interoception
electrolocation. Sensory receptors
Spinal cord
Spinal Cord - drug effects
Spinal Cord - physiology
Structure-Activity Relationship
Vertebrates: endocrinology
Vertebrates: nervous system and sense organs
title Antinociceptive effects of spinally administered nociceptin/orphanin FQ and its N-terminal fragments on capsaicin-induced nociception
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