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Artykov M, Ozcelebi E, Sara MY, Gudeloglu A, Iskit AB, Aki FT. In vitro effects of β3-adrenoceptor agonist mirabegron on the human ureter. Neurourol Urodyn 2024; 43:1709-1717. [PMID: 38660954 DOI: 10.1002/nau.25483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Revised: 04/02/2024] [Accepted: 04/15/2024] [Indexed: 04/26/2024]
Abstract
INTRODUCTION This study aimed to investigate the effect of mirabegron, a β3-adrenoceptor agonist with widespread clinical use for treating overactive bladder disease, on isolated healthy human ureter strips. MATERIALS AND METHODS This was a prospective study employing a series of in vitro organ bath experiments using ureteral tissues of kidney grafts from 10 healthy donors. The ureteral strips were subjected to cumulative mirabegron concentrations (10-9-10-4.5 M). Effects on frequency or amplitude of spontaneous, 10 mM KCl- or EFS-induced contractions were evaluated. RESULTS Mirabegron decreased the frequency of spontaneous ureteric contraction in a concentration-dependent manner. Statistically significant decrease in the frequency of spontaneous contraction was observed at 10-8-10-4.5 M. In 10 mM KCl medium, statistically significant change in frequency was observed at 10-9-10-4.5 M. Statistically significant decrease in the amplitudes of spontaneous contraction was observed at 10-7-10-4.5 M. In a 10 mM KCl medium, statistically significant change in amplitudes was observed at 10-8-10-4.5 M. CONCLUSIONS Mirabegron reduced the amplitude and frequency of human ureter activity in in vitro organ bath studies. This effect was achieved in a dose-dependent manner on isolated tissue strips. Although monotherapy with mirabegron remains uncertain, this study has the potential to elucidate the mechanism underlying the effectiveness of mirabegron, particularly in combination therapy for ureteral stones.
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Affiliation(s)
- Meylis Artykov
- Department of Urology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Esin Ozcelebi
- Department of Pharmacology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Mehmet Yildirim Sara
- Department of Pharmacology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Ahmet Gudeloglu
- Department of Urology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Alper Bektas Iskit
- Department of Pharmacology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Fazil Tuncay Aki
- Department of Urology, Hacettepe University Faculty of Medicine, Ankara, Turkey
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Liu J, Liu L, Zhao M, Ding N, Ge N, Daugherty SL, Beckel JM, Wang S, Zhang X. Activation of TRPM8 channel inhibits contraction of the isolated human ureter. Neurourol Urodyn 2021; 40:1450-1459. [PMID: 34015169 DOI: 10.1002/nau.24689] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 04/14/2021] [Indexed: 12/19/2022]
Abstract
AIMS The transient receptor potential melastin-8 (TRPM8) channel is a "cooling" receptor expressed in primary sensory neurons and can be activated by compounds like menthol or icilin. TRPM8 is involved in the regulation of urinary bladder sensory function and contraction, but the role of TRPM8 in the ureter, particularly in the human ureter, is poorly understood. The aim of this study is to examine the effects of TRPM8 activation on human ureter contraction. METHODS Human ureters were acquired from 20 patients undergoing radical nephrectomy. Contractions of ureter strips were recorded by an isometric transducer in the organ bath. Ureteral TRPM8 expression in the human ureter was examined by immunofluorescence and western blot. RESULTS The two TRPM8 agonists menthol and icilin both reduced the frequency of spontaneous, electrical field stimulation, or neurokinin A-evoked ureteral contractions in a dose-dependent manner. The inhibitory effects were decreased by 10-fold in mucosa-denuded strips. The inhibitory effects of TRPM8 agonists were mimicked by calcitonin gene-related peptide (CGRP), and were blocked by KRP2579 (a TRPM8 antagonist), tetrodotoxin (a sodium channel blocker), olcegepant (BIBN, a CGRP receptor antagonist), SQ22536 (an adenylate cyclase antagonist), or H89 (a nonspecific cAMP-dependent protein kinase A inhibitor). TRPM8 was coexpressed with CGRP on the nerves located in the suburothelial and intermuscular regions and was not expressed in the urothelium. CONCLUSIONS The TRPM8 channel expressed on sensory nerve terminals of the human ureter is involved in the inhibitory sensory neurotransmission and modulate ureter contraction via the CGRP-adenylyl cyclase-protein kinase A pathway. TRPM8 may be involved in stone-induced changes in ureter contraction or pain.
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Affiliation(s)
- Jiaxin Liu
- Department of Urology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Shandong University, Jinan, Shandong, China
| | - Lei Liu
- Department of Urology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Shandong University, Jinan, Shandong, China
| | - Mengmeng Zhao
- Department of Urology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Shandong University, Jinan, Shandong, China
| | - Ning Ding
- Department of Urology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Shandong University, Jinan, Shandong, China
| | - Nan Ge
- Department of Urology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Shandong University, Jinan, Shandong, China
| | - Stephanie L Daugherty
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Jonathan M Beckel
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Shaoyong Wang
- Department of Urology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Shandong University, Jinan, Shandong, China
| | - Xiulin Zhang
- Department of Urology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Shandong University, Jinan, Shandong, China
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Liu J, Zhao M, Chen Z, Xu Y, Guo L, Wang S, Li Y, Shi B, Zhang X, Jin XD. TRPM3 channel activation inhibits contraction of the isolated human ureter via CGRP released from sensory nerves. Life Sci 2021; 268:118967. [PMID: 33417951 DOI: 10.1016/j.lfs.2020.118967] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/18/2020] [Accepted: 12/21/2020] [Indexed: 11/29/2022]
Abstract
AIMS Sensory nerve activation modulates ureteral contractility by releasing neuropeptides including CGRP and neurokinin A (NKA). TRPM3 is a recently discovered thermosensitive channel expressed in nociceptive sensory neurons, and plays a key role in heat nociception and chronic pain. The aim of this study is to examine the role of TRPM3 activation in human ureter motility. MAIN METHOD Human proximal ureters were obtained from fourteen patients undergoing nephrectomy. Spontaneous or NKA-evoked contractions of longitudinal ureter strips were recorded in an organ bath. Ureteral TRPM3 expression was examined by immunofluorescence. KEY FINDINGS Spontaneous contractions were observed in 60% of examined strips. TRPM3 activation using pregnenolone sulphate (PS) or CIM0216 (specific TRPM3 agonists) dose-dependently reduced the frequency of spontaneous and NKA-evoked contractions, with IC50s of 241.7 μM and 4.4 μM, respectively. The inhibitory actions of TRPM3 agonists were mimicked by CGRP (10 to 100 nM) or a cAMP analogue (8-Br-cAMP; 1 mM). The inhibitory actions of TRPM3 agonists (300 μM PS or 30 μM CIM0216) were blocked by pretreatment with primidone (TRPM3 antagonist; 30 μM), tetrodotoxin (sodium channel blocker; 1 μM), olcegepant (CGRP receptor antagonist; 10 μM), or H89 (non-specific PKA inhibitor; 30 μM). TRPM3 was co-expressed with CGRP in nerves in the sub-urothelial and intermuscular regions of the ureter. SIGNIFICANCE TRPM3 channels expressed on sensory terminals of the human ureter involve in inhibitory sensory neurotransmission and modulate ureter motility via the CGRP-cAMP-PKA signal pathway. Targeting TRPM3 may be a pharmacological strategy for promoting the ureter stone passage.
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Affiliation(s)
- Jiaxin Liu
- The First Affiliated Hospital, College of Medicine, Zhejiang University, China
| | - Mengmeng Zhao
- Department of Urology, The Second Hospital, Cheeloo College of Medicine, Shandong University, China
| | - Zhenghao Chen
- Department of Urology, The Second Hospital, Cheeloo College of Medicine, Shandong University, China
| | - Yang Xu
- Department of Urology, The Second Hospital, Cheeloo College of Medicine, Shandong University, China
| | - Liqiang Guo
- Department of Urology, The Second Hospital, Cheeloo College of Medicine, Shandong University, China
| | - Shaoyong Wang
- Department of Urology, The Second Hospital, Cheeloo College of Medicine, Shandong University, China
| | - Yan Li
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, China
| | - Benkang Shi
- Department of Urology, Qilu Hospital, Cheeloo College of Medicine, Shandong University, China
| | - Xiulin Zhang
- Department of Urology, The Second Hospital, Cheeloo College of Medicine, Shandong University, China.
| | - Xiao-Dong Jin
- The First Affiliated Hospital, College of Medicine, Zhejiang University, China.
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Lim I, Chess-Williams R, Sellers D. A porcine model of ureteral contractile activity: Influences of age, tissue orientation, region, urothelium, COX and NO. J Pharmacol Toxicol Methods 2020; 102:106661. [DOI: 10.1016/j.vascn.2019.106661] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 11/07/2019] [Accepted: 12/03/2019] [Indexed: 10/25/2022]
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