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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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) |
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HSK21542 kappa opioid receptor pain pruritus animal models Therapeutics. Pharmacology RM1-950 |
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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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