生物活性 | |||
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描述 | β3-AR is a G protein-coupled receptor. Functional β3-AR-mediated responses have been observed in human brown and white fat cells, where they mediate lipolysis; and in gall bladder, stomach, small intestine, prostate, colon, and bladder, where they evoke relaxation. Mirabegron is a selective β3-adrenoceptor agonist. Mirabegron concentration-dependently increased the accumulation of cAMP in CHO cells expressing human β3-ARs, with an EC50 value and I.A. of 22.4 nM and 0.8, respectively. Mirabegron concentration-dependently relaxed rat bladder smooth muscle strips precontracted with 10-6 M CCh with EC50 value of 5.1 μM. The maximal relaxant effect of mirabegron was 94.0±1.0%, that of CCh, indicating that mirabegron acts a full agonist in the rat bladder. Mirabegron concentration-dependently relaxed human bladder smooth muscle strips precontracted with 10-7 M CCh with EC50 value of 0.78 μM. The maximal relaxant effect of mirabegron was 89.4±2.3%. Mirabegron produced a dose-dependent decrease in the frequency of rhythmic bladder contraction in anesthetized rats[3]. SAAs (single-unit afferent activities) of both Aδ-fibers and C-fibers in response to bladder filling significantly decreased after mirabegron administration in a dose-dependent manner (Nerves with conduction velocities (CVs) >2.5 m/s were designated as Aδ-fibers, and nerves with CVs<2.5 m/s were designated as C-fibers)[4]. |
临床研究 | |||||
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NCT号 | 适应症或疾病 | 临床期 | 招募状态 | 预计完成时间 | 地点 |
NCT00337090 | Overactive Bladder | Phase 2 | Completed | - | - |
NCT02811289 | Type 2 Diabetes | Not Applicable | Completed | - | Canada, Quebec ... 展开 >> centre de recherche du CHUS Sherbrooke, Quebec, Canada, J1H 5N4 收起 << |
NCT01043666 | Urinary Bladder, Overactive | Phase 3 | Completed | - | China ... 展开 >> Beijing, China Dalian, China Fuzhou, China Guangzhou, China Hangzhou, China Hubei, China Hunan, China Jiangsu, China Liaoning, China Nanjing, China Shanghai, China India Ahmedabad, India Gurgaon, India Jaipur, India Lucknow, India New Delhi, India Pune, India Korea, Republic of Busan, Korea, Republic of Chungcheong Namdo, Korea, Republic of Daegu, Korea, Republic of Daejeon, Korea, Republic of Gwangju, Korea, Republic of Gyeonggi, Korea, Republic of Incheon, Korea, Republic of Jeollabuk, Korea, Republic of Jeollanam, Korea, Republic of Kyonggi, Korea, Republic of Seoul, Korea, Republic of Taiwan Chia-Yi, Taiwan Hualien, Taiwan Kaohsiung, Taiwan Taichung, Taiwan Tainan, Taiwan Taipei, Taiwan Taoyuan, Taiwan 收起 << |
实验方案 | |||
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1mg | 5mg | 10mg | |
1 mM 5 mM 10 mM |
2.52mL 0.50mL 0.25mL |
12.61mL 2.52mL 1.26mL |
25.22mL 5.04mL 2.52mL |
参考文献 |
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