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On the Site and Mechanism of Action of β3-Adrenoceptor Agonists in the Bladder

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초록

The clinical success of mirabegron as the first β3-adrenoceptor (AR) agonist for treatment of the overactive bladder (OAB) syndrome, has resulted in substantial interest in its site and mechanism of action. Even if the adrenergic innervation of the bladder and urethra has been well studied, the location(s) of β3-ARs in different structures within the bladder wall and urethra, and the mode(s) of action of β3-AR stimulation have still not been established. The recent demonstration of β3-ARs on cholinergic nerve terminals with no immunoreactivity in urothelium or detrusor smooth muscle, is not in agreement with previous morphological studies, and functional data strongly suggest that β3-ARs can be found these structures. However, recent studies suggest that the β3-ARs on detrusor smooth muscle may not be the functionally most relevant. The assumption that β3-AR activation during bladder filling inhibits acetylcholine release from parasympathetic neurons by a prejunctional mechanism and that this decreases bladder micromotions that generate afferent activity, is an attractive hypothesis. It does not exclude that other mechanisms may be contributing, and supports combined approaches to reduce afferent activity for treatment of the OAB syndrome.

Abstract

The clinical success of mirabegron as the first β3-adrenoceptor (AR) agonist for treatment of the overactive bladder (OAB) syndrome, has resulted in substantial interest in its site and mechanism of action. Even if the adrenergic innervation of the bladder and urethra has been well studied, the location(s) of β3-ARs in different structures within the bladder wall and urethra, and the mode(s) of action of β3-AR stimulation have still not been established. The recent demonstration of β3-ARs on cholinergic nerve terminals with no immunoreactivity in urothelium or detrusor smooth muscle, is not in agreement with previous morphological studies, and functional data strongly suggest that β3-ARs can be found these structures. However, recent studies suggest that the β3-ARs on detrusor smooth muscle may not be the functionally most relevant. The assumption that β3-AR activation during bladder filling inhibits acetylcholine release from parasympathetic neurons by a prejunctional mechanism and that this decreases bladder micromotions that generate afferent activity, is an attractive hypothesis. It does not exclude that other mechanisms may be contributing, and supports combined approaches to reduce afferent activity for treatment of the OAB syndrome.

참고문헌 (52)

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관련 논문AI추천

Pathophysiology of Overactive Bladder and Pharmacologic Treatments Including β3-Adrenoceptor Agonists -Basic Research Perspectives김덕윤, 조강준, Anne M. Robertson, Joonbeom Kwon, Kanako Matsuoka, Mamoru Hashimoto, Naoki Yoshimura, Pradeep Tyagi, Sergei Karnup, Tadanobu Kamijo, Zhou Wang대한배뇨장애요실금학회 · International Neurourology Journal2024 · 제28권 제1호A Clinician’s Perspective on the Mechanism of β3-Adrenoceptor Agonists in the Bladder이택대한배뇨장애요실금학회 · International Neurourology Journal2017 · 제21권 제1호Capsaicin-Sensitive Sensory Nerves Indirectly Modulate Motor Function of the Urinary BladderCheng-Hsing Hsieh, Chun-Kai Hsu, Hsi-Hsien Chang, Shang-Jen Chang, Stephen Shei-Dei Yang대한배뇨장애요실금학회 · International Neurourology Journal2018 · 제22권 제2호A Prospective Paired Comparison Trial of Mirabegron and Anticholinergics in Patients With Low Bladder ComplianceHee Seo Son, Jang Hwan Kim대한배뇨장애요실금학회 · International Neurourology Journal2025 · 제29권 제3호Changes in Awake Cystometry and Expression of Bladder β-adrenoceptors after Partial Bladder Outlet Obstruction in Male Rats김형지, 박민구, 박홍석, 이정구대한배뇨장애요실금학회 · International Neurourology Journal2010 · 제14권 제3호Beta 3 Adrenoreceptor Agonist for the Management of Lower Urinary Tract Symptoms in Men With Benign Prostatic Hyperplasia: A Systematic Review강태욱, 김명하, 김수진, 정재흥대한배뇨장애요실금학회 · International Neurourology Journal2021 · 제25권 제3호

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