Antinociceptive and Antipruritic Effects of HSK21542, a Peripherally-Restricted Kappa Opioid Receptor Agonist, in Animal Models of Pain and Itch

Kappa opioid receptor (KOR) agonists have been promising therapeutic candidates, owing to their potential for relieving pain and treating intractable pruritus. Although lacking morphine-like central nervous system (CNS) effects, KOR agonists do elicit sedation, dysphoria and diuresis which seriously...

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Autores principales: Xin Wang, Xiaoli Gou, Xiaojuan Yu, Dongdong Bai, Bowei Tan, Pingfeng Cao, Meilin Qian, Xiaoxiao Zheng, Hairong Wang, Pingming Tang, Chen Zhang, Fei Ye, Jia Ni
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Publicado: Frontiers Media S.A. 2021
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Acceso en línea:https://doaj.org/article/1887529fd32b4df59dbadda726d129cb
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spelling oai:doaj.org-article:1887529fd32b4df59dbadda726d129cb2021-11-16T05:18:12ZAntinociceptive and Antipruritic Effects of HSK21542, a Peripherally-Restricted Kappa Opioid Receptor Agonist, in Animal Models of Pain and Itch1663-981210.3389/fphar.2021.773204https://doaj.org/article/1887529fd32b4df59dbadda726d129cb2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fphar.2021.773204/fullhttps://doaj.org/toc/1663-9812Kappa opioid receptor (KOR) agonists have been promising therapeutic candidates, owing to their potential for relieving pain and treating intractable pruritus. Although lacking morphine-like central nervous system (CNS) effects, KOR agonists do elicit sedation, dysphoria and diuresis which seriously impede their development. Peripherally-restricted KOR agonists have a poor ability to penetrate into the CNS system, so that CNS-related adverse effects can be ameliorated or even abolished. However, the only approved peripherally-restricted KOR agonist CR845 remains some frequent CNS adverse events. In the present study, we aim to address pharmacological profiles of HSK21542, with an expectation to provide a safe and effective alternative for patients who are suffering from pain and pruritus. The in vitro experimental results showed that HSK21542 was a selective and potent KOR agonist with higher potency than CR845, and had a brain/plasma concentration ratio of 0.001, indicating its peripheral selectivity. In animal models of pain, HSK21542 significantly inhibited acetic acid-, hindpaw incision- or chronic constriction injury-induced pain-related behaviors, and the efficacy was comparable to CR845 at 15 min post-dosing. HSK21542 had a long-lasting analgesic potency with a median effective dose of 1.48 mg/kg at 24 h post-drug in writhing test. Meanwhile, the antinociceptive activity of HSK21542 was effectively reversed by a KOR antagonist nor-binaltorphimine. In addition, HSK21542 had powerful antipruritic activities in compound 48/80-induced itch model. On the other hand, HSK21542 had a weak ability to produce central antinociceptive effects in a hot-plate test and fewer effects on the locomotor activity of mice. HSK21542 didn’t affect the respiratory rate of mice. Therefore, HSK21542 might be a safe and effective KOR agonist and promising candidate for treating pain and pruritus.Xin WangXiaoli GouXiaojuan YuDongdong BaiBowei TanPingfeng CaoMeilin QianXiaoxiao ZhengHairong WangPingming TangChen ZhangFei YeJia NiFrontiers Media S.A.articleHSK21542kappa opioid receptorpainpruritusanimal modelsTherapeutics. PharmacologyRM1-950ENFrontiers in Pharmacology, Vol 12 (2021)
institution DOAJ
collection DOAJ
language EN
topic HSK21542
kappa opioid receptor
pain
pruritus
animal models
Therapeutics. Pharmacology
RM1-950
spellingShingle HSK21542
kappa opioid receptor
pain
pruritus
animal models
Therapeutics. Pharmacology
RM1-950
Xin Wang
Xiaoli Gou
Xiaojuan Yu
Dongdong Bai
Bowei Tan
Pingfeng Cao
Meilin Qian
Xiaoxiao Zheng
Hairong Wang
Pingming Tang
Chen Zhang
Fei Ye
Jia Ni
Antinociceptive and Antipruritic Effects of HSK21542, a Peripherally-Restricted Kappa Opioid Receptor Agonist, in Animal Models of Pain and Itch
description Kappa opioid receptor (KOR) agonists have been promising therapeutic candidates, owing to their potential for relieving pain and treating intractable pruritus. Although lacking morphine-like central nervous system (CNS) effects, KOR agonists do elicit sedation, dysphoria and diuresis which seriously impede their development. Peripherally-restricted KOR agonists have a poor ability to penetrate into the CNS system, so that CNS-related adverse effects can be ameliorated or even abolished. However, the only approved peripherally-restricted KOR agonist CR845 remains some frequent CNS adverse events. In the present study, we aim to address pharmacological profiles of HSK21542, with an expectation to provide a safe and effective alternative for patients who are suffering from pain and pruritus. The in vitro experimental results showed that HSK21542 was a selective and potent KOR agonist with higher potency than CR845, and had a brain/plasma concentration ratio of 0.001, indicating its peripheral selectivity. In animal models of pain, HSK21542 significantly inhibited acetic acid-, hindpaw incision- or chronic constriction injury-induced pain-related behaviors, and the efficacy was comparable to CR845 at 15 min post-dosing. HSK21542 had a long-lasting analgesic potency with a median effective dose of 1.48 mg/kg at 24 h post-drug in writhing test. Meanwhile, the antinociceptive activity of HSK21542 was effectively reversed by a KOR antagonist nor-binaltorphimine. In addition, HSK21542 had powerful antipruritic activities in compound 48/80-induced itch model. On the other hand, HSK21542 had a weak ability to produce central antinociceptive effects in a hot-plate test and fewer effects on the locomotor activity of mice. HSK21542 didn’t affect the respiratory rate of mice. Therefore, HSK21542 might be a safe and effective KOR agonist and promising candidate for treating pain and pruritus.
format article
author Xin Wang
Xiaoli Gou
Xiaojuan Yu
Dongdong Bai
Bowei Tan
Pingfeng Cao
Meilin Qian
Xiaoxiao Zheng
Hairong Wang
Pingming Tang
Chen Zhang
Fei Ye
Jia Ni
author_facet Xin Wang
Xiaoli Gou
Xiaojuan Yu
Dongdong Bai
Bowei Tan
Pingfeng Cao
Meilin Qian
Xiaoxiao Zheng
Hairong Wang
Pingming Tang
Chen Zhang
Fei Ye
Jia Ni
author_sort Xin Wang
title Antinociceptive and Antipruritic Effects of HSK21542, a Peripherally-Restricted Kappa Opioid Receptor Agonist, in Animal Models of Pain and Itch
title_short Antinociceptive and Antipruritic Effects of HSK21542, a Peripherally-Restricted Kappa Opioid Receptor Agonist, in Animal Models of Pain and Itch
title_full Antinociceptive and Antipruritic Effects of HSK21542, a Peripherally-Restricted Kappa Opioid Receptor Agonist, in Animal Models of Pain and Itch
title_fullStr Antinociceptive and Antipruritic Effects of HSK21542, a Peripherally-Restricted Kappa Opioid Receptor Agonist, in Animal Models of Pain and Itch
title_full_unstemmed Antinociceptive and Antipruritic Effects of HSK21542, a Peripherally-Restricted Kappa Opioid Receptor Agonist, in Animal Models of Pain and Itch
title_sort antinociceptive and antipruritic effects of hsk21542, a peripherally-restricted kappa opioid receptor agonist, in animal models of pain and itch
publisher Frontiers Media S.A.
publishDate 2021
url https://doaj.org/article/1887529fd32b4df59dbadda726d129cb
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