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Ono H, Shimizu T, Zou S, Yamamoto M, Shimizu Y, Aratake T, Hamada T, Nagao Y, Shimizu S, Higashi Y, Saito M. Brain nitric oxide induces facilitation of the micturition reflex through brain glutamatergic receptors in rats. Neurourol Urodyn 2020; 39:1687-1699. [DOI: 10.1002/nau.24440] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/28/2020] [Accepted: 06/08/2020] [Indexed: 12/31/2022]
Affiliation(s)
- Hideaki Ono
- Department of PharmacologyKochi Medical School, Kochi University Nankoku Kochi Japan
- Innovative Medicine Group, Center for Innovative and Translational Medicine, Kochi Medical SchoolKochi University Nankoku Kochi Japan
| | - Takahiro Shimizu
- Department of PharmacologyKochi Medical School, Kochi University Nankoku Kochi Japan
| | - Suo Zou
- Department of PharmacologyKochi Medical School, Kochi University Nankoku Kochi Japan
| | - Masaki Yamamoto
- Department of PharmacologyKochi Medical School, Kochi University Nankoku Kochi Japan
| | - Yohei Shimizu
- Department of PharmacologyKochi Medical School, Kochi University Nankoku Kochi Japan
- Innovative Medicine Group, Center for Innovative and Translational Medicine, Kochi Medical SchoolKochi University Nankoku Kochi Japan
| | - Takaaki Aratake
- Department of PharmacologyKochi Medical School, Kochi University Nankoku Kochi Japan
- Research Fellow of Japan Society for the Promotion of Science Japan
| | - Tomoya Hamada
- Department of PharmacologyKochi Medical School, Kochi University Nankoku Kochi Japan
| | - Yoshiki Nagao
- Department of PharmacologyKochi Medical School, Kochi University Nankoku Kochi Japan
| | - Shogo Shimizu
- Department of PharmacologyKochi Medical School, Kochi University Nankoku Kochi Japan
| | - Youichirou Higashi
- Department of PharmacologyKochi Medical School, Kochi University Nankoku Kochi Japan
| | - Motoaki Saito
- Department of PharmacologyKochi Medical School, Kochi University Nankoku Kochi Japan
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Higashi Y, Shimizu T, Yamamoto M, Tanaka K, Yawata T, Shimizu S, Zou S, Ueba T, Yuri K, Saito M. Stimulation of brain nicotinic acetylcholine receptors activates adrenomedullary outflow via brain inducible NO synthase-mediated S-nitrosylation. Br J Pharmacol 2018; 175:3758-3772. [PMID: 30007012 DOI: 10.1111/bph.14445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 05/26/2018] [Accepted: 07/04/2018] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND AND PURPOSE We have demonstrated that i.c.v.-administered (±)-epibatidine, a nicotinic ACh receptor (nAChR) agonist, induced secretion of noradrenaline and adrenaline (catecholamines) from the rat adrenal medulla with dihydro-β-erythroidin (an α4β2 nAChR antagonist)-sensitive brain mechanisms. Here, we examined central mechanisms for the (±)-epibatidine-induced responses, focusing on brain NOS and NO-mediated mechanisms, soluble GC (sGC) and protein S-nitrosylation (a posttranslational modification of protein cysteine thiol groups), in urethane-anaesthetized (1.0 g·kg-1 , i.p.) male Wistar rats. EXPERIMENTAL APPROACH (±)-Epibatidine was i.c.v. treated after i.c.v. pretreatment with each inhibitor described below. Then, plasma catecholamines were measured electrochemically after HPLC. Immunoreactivity of S-nitrosylated cysteine (SNO-Cys) in α4 nAChR subunit (α4)-positive spinally projecting neurones in the rat hypothalamic paraventricular nucleus (PVN, a regulatory centre of adrenomedullary outflow) after i.c.v. (±)-epibatidine administration was also investigated. KEY RESULTS (±)-Epibatidine-induced elevation of plasma catecholamines was significantly attenuated by L-NAME (non-selective NOS inhibitor), carboxy-PTIO (NO scavenger), BYK191023 [selective inducible NOS (iNOS) inhibitor] and dithiothreitol (thiol-reducing reagent), but not by 3-bromo-7-nitroindazole (selective neuronal NOS inhibitor) or ODQ (sGC inhibitor). (±)-Epibatidine increased the number of spinally projecting PVN neurones with α4- and SNO-Cys-immunoreactivities, and this increment was reduced by BYK191023. CONCLUSIONS AND IMPLICATIONS Stimulation of brain nAChRs can induce elevation of plasma catecholamines through brain iNOS-derived NO-mediated protein S-nitrosylation in rats. Therefore, brain nAChRs (at least α4β2 subtype) and NO might be useful targets for alleviation of catecholamines overflow induced by smoking.
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Affiliation(s)
- Youichirou Higashi
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Takahiro Shimizu
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Masaki Yamamoto
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Kenjiro Tanaka
- Department of Neurobiology and Anatomy, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Toshio Yawata
- Department of Neurosurgery, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Shogo Shimizu
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Suo Zou
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Tetsuya Ueba
- Department of Neurosurgery, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Kazunari Yuri
- Department of Neurobiology and Anatomy, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
| | - Motoaki Saito
- Department of Pharmacology, Kochi Medical School, Kochi University, Nankoku, Kochi, Japan
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