Article(id=1308840288026714806, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1308840287129141340, articleNumber=null, orderNo=null, doi=10.16438/j.0513-4870.2025-1250, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1760976000000, receivedDateStr=2025-10-21, revisedDate=1766505600000, revisedDateStr=2025-12-24, acceptedDate=null, acceptedDateStr=null, onlineDate=1789981441742, onlineDateStr=2026-09-21, pubDate=1775923200000, pubDateStr=2026-04-12, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1789981441742, onlineIssueDateStr=2026-09-21, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1789981441742, creator=13701087609, updateTime=1789981441742, updator=13701087609, issue=Issue{id=1308840287129141340, tenantId=1146029695717560320, journalId=1189982191388893191, year='2026', volume='61', issue='4', pageStart='1001', pageEnd='1434', issueExtLink='null', onlineDate='null', pubDate='1775923200000', pubDateStr='2026-04-12', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1789981441528, creator='13701087609', updateTime=1789984228828, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1308851977992368434, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1308840287129141340, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1308851977992368435, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1308840287129141340, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=1011, endPage=1018, ext={EN=ArticleExt(id=1308840288643277495, articleId=1308840288026714806, tenantId=1146029695717560320, journalId=1189982191388893191, language=EN, title=Research progress on the role and mechanisms of
κ-opioid receptor in pruritus regulation, columnId=1190335348648547107, journalTitle=Acta Pharmaceutica Sinica, columnName=Reviews, runingTitle=null, highlight=null, articleAbstract=
Pruritus is an important physiological sensation mediated by the somatosensory system, and its clinical significance is increasingly recognized. Based on the underlying mechanisms, pruritus can be classified into histaminergic and non-histaminergic types. Non-histaminergic pruritus constitutes the major form of most chronic pruritus conditions and often shows poor response to conventional antihistamines. The gastrin-releasing peptide receptor (GRPR) in the spinal cord, serving as a pruritus-specific receptor, plays a critical role in the transmission of non-histaminergic pruritic signals. The κ-opioid receptor (KOR) and the μ-opioid receptor (MOR) exert opposite effects in pruritus regulation: MOR activation promotes pruritus, whereas KOR activation produces inhibitory effects. This review systematically elaborates on the multiple molecular mechanisms through which KOR inhibits pruritus, with a focus on the direct inhibition of GRPR function via protein kinase Cδ (PKCδ)-mediated phosphorylation, interference with intracellular calcium signaling, potential modulation of the phosphoinositide 3-kinase (PI3K)/Akt pathway, and comprehensive regulation of pruritic pathways through signaling molecules such as Gβγ and β-arrestin 2. Together, these mechanisms constitute the basis for KOR-mediated regulation of pruritic signals at the spinal level. Although KOR agonists (e.g., TRK-820, CR845) have shown therapeutic potential for chronic pruritus in clinical studies, translational challenges such as species differences and cross-talk among signaling pathways warrant further attention. In-depth elucidation of the KOR regulatory network not only provides novel insights into the physiological and pathological mechanisms of pruritus but also establishes a solid theoretical foundation for the development of novel, highly-targeted anti-pruritus drugs with fewer side effects.
, authors=Xin-yang GUO
1, 2, Jing-yu YANG
1, *, Pei-lan ZHOU
2, *, Rui-bin SU
1, 2, *, authorsList=Xin-yang GUO, Jing-yu YANG, Pei-lan ZHOU, Rui-bin SU, authorCompany=null, correspAuthors=Jing-yu YANG, Pei-lan ZHOU, Rui-bin SU, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2026 Acta Pharmaceutica Sinica. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1308840289360503484, articleId=1308840288026714806, tenantId=1146029695717560320, journalId=1189982191388893191, language=CN, title=
κ阿片受体在瘙痒调控中的作用及其机制研究进展, columnId=1190335349655180086, journalTitle=药学学报, columnName=综述, runingTitle=null, highlight=null, articleAbstract=
瘙痒是一种由躯体感觉系统介导的重要生理感觉, 其临床意义日益受到关注。根据发生机制, 瘙痒可分为组胺能和非组胺能两种类型, 其中非组胺能瘙痒是大多数慢性瘙痒的主要形式, 常规抗组胺药物的治疗反应不佳。脊髓中的胃泌素释放肽受体(gastrin-releasing peptide receptor, GRPR) 作为瘙痒特异性受体, 在非组胺能瘙痒的信号传递中发挥关键作用。κ阿片受体(κ-opioid receptor, KOR) 与μ阿片受体(μ-opioid receptor, MOR) 在瘙痒调控中发挥相反作用: MOR激活促进瘙痒, 而KOR激活则产生抑制作用。本综述系统阐述KOR抑制瘙痒的多重分子机制, 重点包括: 通过蛋白激酶Cδ (protein kinase Cδ, PKCδ) 磷酸化直接抑制GRPR功能、干扰细胞内钙信号、对磷脂酰肌醇3-激酶(phosphoinositide 3-kinase, PI3K)/Akt通路的潜在调控, 以及经由Gβγ、β-arrestin 2等信号分子对瘙痒通路进行的综合性调控。这些机制共同构成了KOR在脊髓水平调控瘙痒信号的基础。尽管KOR激动剂(如TRK-820、CR845) 在临床研究中显示出治疗慢性瘙痒的潜力, 但仍需关注物种差异、信号通路交叉干扰等转化挑战。深入阐明KOR的调控网络, 不仅为揭示瘙痒的生理、病理机制提供了新视角, 也为开发靶向性强、不良反应少的新型止痒药物奠定了坚实的理论基础。
, authors=郭鑫阳
1, 2, 杨静玉
1, *, 周培岚
2, *, 苏瑞斌
1, 2, *, authorsList=郭鑫阳, 杨静玉, 周培岚, 苏瑞斌, authorCompany=null, correspAuthors=杨静玉, 周培岚, 苏瑞斌, authorNote=
作者贡献:
郭鑫阳负责文献检索和文章撰写; 周培岚、杨静玉、苏瑞斌对论文进行设计、整体指导和修改。所有作者阅读并认可终稿。
, correspAuthorsNote=
, copyrightStatement=版权所有©《药学学报》编辑部2026, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=cOgJ4GQTI2fSptlZAxDKWw==, magXml=IqSt+1X0q7e0YZ5KyweGPA==, pdfUrl=null, pdf=zGWxxXInkYuFrVEPtDosVA==, pdfFileSize=943595, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=3T3N5lKpUKczHvksae9odg==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=REEsfp8gEU1GhG2Lpu5Erg==, mapNumber=null, fund=null)}, authors=[Author(id=1308840289725407940, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308840288026714806, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=null, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1308840289809294023, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308840288026714806, authorId=1308840289725407940, language=EN, stringName=Xin-yang GUO, firstName=Xin-yang, middleName=null, lastName=GUO, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1School of Clinical Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China
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1沈阳药科大学临床药学院, 辽宁 沈阳 110016
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2军事医学研究院, 北京 100850, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1308840289637327552, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308840288026714806, xref=2, ext=[AuthorCompanyExt(id=1308840289645716161, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308840288026714806, companyId=1308840289637327552, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1沈阳药科大学临床药学院, 辽宁 沈阳 110016
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μ阿片受体), Keyword(id=1308840291323437794, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308840288026714806, language=CN, orderNo=5, keyword=信号转导)], refs=[Reference(id=1308840291914834663, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308840288026714806, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=1, rfOrder=0, authorNames=null, journalName=null, refType=null, unstructuredReference=Toyama S, Tominaga M, Takamori K. Treatment options for troublesome itch [J]. Pharmaceuticals (Basel), 2022, 15: 1022., articleTitle=null, refAbstract=null), Reference(id=1308840291990332136, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308840288026714806, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=2, rfOrder=1, authorNames=null, journalName=null, refType=null, unstructuredReference=Lavery MJ, Kinney MO, Mochizuki H, et al. Pruritus: An overview. What drives people to scratch an itch? [J]. Ulster Med J, 2016, 85: 164-173., articleTitle=null, refAbstract=null), Reference(id=1308840292053246697, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308840288026714806, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=3, rfOrder=2, authorNames=null, journalName=null, refType=null, unstructuredReference=Mobarakeh JI, Sakurada S, Katsuyama S, et al. Role of histamine H
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Schematic diagram of pruritus induced by intrathecal morphine injection via the disinhibition of dynorphinergic and neuropeptide Y neurons. This figure illustrates the key neural circuit mechanism underlying pruritus induction at the spinal dorsal horn level following morphine intrathecal administration. Morphine, acting as a μ-opioid receptor (MOR) agonist, primarily activates MORs expressed on dynorphinergic (Pdyn+) neurons and neuropeptide Y (NPY+) neurons. MOR activation inhibits these two types of inhibitory interneurons, leading to a significant reduction in the release of inhibitory neurotransmitters, including dynorphin, γ-aminobutyric acid (GABA), neuropeptide Y (NPY), and glycine. This "disinhibition" effect enhances the activity of downstream gastrin-releasing peptide receptor (GRPR+) excitatory neurons, thereby relaying intense pruritic signals to higher brain centers and ultimately evoking scratching behavior, figureFileSmall=/UKZcVJz1JvIhXAikaE7Cw==, figureFileBig=3T3N5lKpUKczHvksae9odg==, tableContent=null), ArticleFig(id=1308840291734479589, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308840288026714806, language=EN, label=null, caption=null, figureFileSmall=2PPdgH9gq5wYkx+oxcOr8A==, figureFileBig=XTg5BxfjkDehXIgxJD78Jw==, tableContent=null), ArticleFig(id=1308840291793199846, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1308840288026714806, language=CN, label=Fig.2, caption=
Schematic diagram of the molecular mechanisms by which μ- and κ-opioid receptors regulate pruritic signaling at the spinal level. This schematic summarizes the mechanisms through which MOR activation promotes and κ-opioid receptor (KOR) activation inhibits spinal pruritic transmission. The pruritogenic effect of MOR is primarily mediated via two key pathways: ① Direct activation through heterodimer formation between MOR1D and GRPR, leading to phospholipase C (PLC) activation, increased intracellular calcium concentration, and enhanced excitability of GRPR+ neurons; ② indirect "disinhibition" via suppression of Pdyn+ and NPY+ inhibitory interneurons, which elevates the excitability of downstream GRPR+ neurons. Conversely, the antipruritic effect of KOR is mediated through multiple converging pathways: ① Direct inhibition of GRPR function via PLC-dependent recruitment and activation of protein kinase Cδ (PKCδ), resulting in GRPR phosphorylation; ② potential inhibitory pathways mediated by signaling molecules including Gαi, Gβγ, and β-arrestin 2 (indicated by dashed inhibitory arrows in the figure), which may collectively contribute to the integrated modulation of GRPR+ neuron excitability; ③ the phosphoinositide 3-kinase (PI3K)/Akt signaling pathway, which also participates in pruritic signal transmission and may be indirectly modulated by KOR. 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