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Shiina T, Suzuki Y, Horii K, Sawamura T, Yuki N, Horii Y, Shimizu Y. Purinergic inhibitory regulation of esophageal smooth muscle is mediated by P2Y receptors and ATP-dependent potassium channels in rats. J Physiol Sci 2024; 74:26. [PMID: 38654149 PMCID: PMC11036717 DOI: 10.1186/s12576-024-00916-5] [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: 09/19/2023] [Accepted: 03/20/2024] [Indexed: 04/25/2024]
Abstract
Purines such as ATP are regulatory transmitters in motility of the gastrointestinal tract. The aims of this study were to propose functional roles of purinergic regulation of esophageal motility. An isolated segment of the rat esophagus was placed in an organ bath, and mechanical responses were recorded using a force transducer. Exogenous application of ATP (10-100 μM) evoked relaxation of the esophageal smooth muscle in a longitudinal direction under the condition of carbachol (1 μM) -induced precontraction. Pretreatment with a non-selective P2 receptor antagonist, suramin (500 μM), and a P2Y receptor antagonist, cibacron blue F3GA (200 μM), inhibited the ATP (100 μM) -induced relaxation, but a P2X receptor antagonist, pyridoxal phosphate-6-azophenyl-2,4-disulfonic acid (50 μM), did not affect it. A blocker of ATP-dependent potassium channels (KATP channels), glibenclamide (200 μM), inhibited the ATP-induced relaxation and application of an opener of KATP channels, nicorandil (50 μM), produced relaxation. The findings suggest that ATP is involved in inhibitory regulation of the longitudinal smooth muscle in the muscularis mucosae of the rat esophagus via activation of P2Y receptors and then opening of KATP channels.
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Affiliation(s)
- Takahiko Shiina
- Department of Basic Veterinary Science, Laboratory of Physiology, Joint Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan.
- Department of Basic Veterinary Science, Laboratory of Physiology, Joint Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan.
| | - Yuji Suzuki
- Department of Basic Veterinary Science, Laboratory of Physiology, Joint Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Kazuhiro Horii
- Division of Biological Principles, Department of Physiology, Graduate School of Medicine, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Tomoya Sawamura
- Department of Basic Veterinary Science, Laboratory of Physiology, Joint Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Natsufu Yuki
- Department of Basic Veterinary Science, Laboratory of Physiology, Joint Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Yuuki Horii
- Institute for Glyco-Core Research (iGCORE), Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Yasutake Shimizu
- Department of Basic Veterinary Science, Laboratory of Physiology, Joint Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
- Department of Basic Veterinary Science, Laboratory of Physiology, Joint Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
- Division of Animal Medical Science, Center for One Medicine Innovative Translational Research (COMIT), Gifu University Institute for Advanced Study, 1-1 Yanagido, Gifu, 501-1193, Japan
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Lee SE, Kim DH, Son SM, Choi SY, You RY, Kim CH, Choi W, Kim HS, Lim YJ, Han JY, Kim HW, Yang IJ, Xu WX, Lee SJ, Kim YC, Yun HY. Physiological function and molecular composition of ATP-sensitive K + channels in human gastric smooth muscle. J Smooth Muscle Res 2020; 56:29-45. [PMID: 32581184 PMCID: PMC7324727 DOI: 10.1540/jsmr.56.29] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Gastric motility is controlled by slow waves. In general, the activation of the
ATP-sensitive K+ (KATP) channels in the smooth muscle
opposes the membrane excitability and produces relaxation. Since metabolic
inhibition and/or diabetes mellitus are accompanied by dysfunctions of gastric
smooth muscle, we examined the possible roles of KATP channels in
human gastric motility. We used human gastric corpus and antrum smooth muscle
preparations and recorded the mechanical activities with a conventional
contractile measuring system. We also identified the subunits of the
KATP channels using Western blot. Pinacidil (10 μM), a
KATP channel opener, suppressed contractions to 30% (basal tone
to −0.2 g) of the control. The inhibitory effect of pinacidil on contraction was
reversed to 59% of the control by glibenclamide (20 μM), a KATP
channel blocker. The relaxation by pinacidil was not affected by a pretreatment
with L-arginine methyl ester, tetraethylammonium, or 4-aminopyridine. Pinacidil
also inhibited the acetylcholine (ACh)-induced tonic and phasic contractions in
a glibenclamide-sensitive manner (42% and 6% of the control, respectively).
Other KATP channel openers such as diazoxide, cromakalim and
nicorandil also inhibited the spontaneous and ACh-induced contractions.
Calcitonin gene-related peptide (CGRP), a gastric neuropeptide, induced muscle
relaxation by the activation of KATP channels in human gastric smooth
muscle. Finally, we have found with Western blot studies, that human gastric
smooth muscle expressed KATP channels which were composed of Kir 6.2
and SUR2B subunits.
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Affiliation(s)
- Sang Eok Lee
- Department of Surgery, College of Medicine, Konyang University, 158 Gwanjeodong-ro, Seo-gu, Daejeon 35365, Korea
| | - Dae Hoon Kim
- Department of Surgery, College of Medicine, Chungbuk National University, Chungdae-ro 1, Seowon-gu, Cheongju, Chungbuk 28644, Korea
| | - Seung Myeung Son
- Department of Pathology, Chungbuk National University, Chungdae-ro 1, Seowon-gu, Cheongju, Chungbuk 28644, Korea
| | - Song-Yi Choi
- Department of Pathology, School of Medicine, Chungnam National University, Daejeon, Chungnam 35015, Korea
| | - Ra Young You
- Department of Physiology, College of Medicine, Chungbuk National University, Chungdae-ro 1, Seowon-gu, Cheongju, Chungbuk 28644, Korea
| | - Chan Hyung Kim
- Department of Pharmacology, College of Medicine, Chungbuk National University, Chungdae-ro 1, Seowon-gu, Cheongju, Chungbuk 28644, Korea
| | - Woong Choi
- Department of Pharmacology, College of Medicine, Chungbuk National University, Chungdae-ro 1, Seowon-gu, Cheongju, Chungbuk 28644, Korea
| | - Hun Sik Kim
- Department of Pharmacology, College of Medicine, Chungbuk National University, Chungdae-ro 1, Seowon-gu, Cheongju, Chungbuk 28644, Korea
| | - Yung Ji Lim
- College of Medicine, Chungbuk National University, Chungdae-ro 1, Seowon-gu, Cheongju, Chungbuk 28644, Korea
| | - Ji Young Han
- CheongDam I Plastic surgery, 21, Sinheung-ro 240, Uijeonbu-si, Gyronggido 11651, Korea
| | - Hyun Woo Kim
- College of Medicine, Chungbuk National University, Chungdae-ro 1, Seowon-gu, Cheongju, Chungbuk 28644, Korea
| | - In Jun Yang
- Department of Surgery, Seoul Nantional University Bundang Hospital, 166 Gumi-ro, Bundang-gu 13620, Seongnam, Korea
| | - Wen-Xie Xu
- Department of Physiology, College of Medcine, Shanghai Jiaotong University, 800 Dongchun Rd. Shanghai, 200240, P.R. China
| | - Sang Jin Lee
- Department of Physiology, College of Medicine, Chungbuk National University, Chungdae-ro 1, Seowon-gu, Cheongju, Chungbuk 28644, Korea
| | - Young Chul Kim
- Department of Physiology, College of Medicine, Chungbuk National University, Chungdae-ro 1, Seowon-gu, Cheongju, Chungbuk 28644, Korea
| | - Hyo-Yung Yun
- Department of Surgery, College of Medicine, Chungbuk National University, Chungdae-ro 1, Seowon-gu, Cheongju, Chungbuk 28644, Korea
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Horii K, Suzuki Y, Shiina T, Saito S, Onouchi S, Horii Y, Shimaoka H, Shimizu Y. ATP-dependent potassium channels contribute to motor regulation of esophageal striated muscle in rats. J Vet Med Sci 2019; 81:1266-1272. [PMID: 31292350 PMCID: PMC6785617 DOI: 10.1292/jvms.19-0197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The aim of the present study was to clarify roles of ATP-dependent potassium channels (KATP channels) in motility of the striated muscle portion in the esophagus. An isolated segment of the rat esophagus was placed in an organ bath and mechanical responses were recorded using a force transducer. Electrical stimulation of the vagus nerve evoked contractile response of striated muscle in the esophageal segment. Application of glibenclamide, an antagonist of KATP channels, increased amplitude of vagally mediated twitch contractions of the rat esophagus. On the other hand, minoxidil, an agonist of KATP channels, decreased amplitude of twitch contractions. RT-PCR revealed the expression of subunits of KATP channels in esophageal tissue. In addition, immunopositivity for subunits of KATP channels was observed in the striated muscle cells of the esophageal muscle layer. These findings indicate that KATP channels contribute to motor regulation of striated muscle in the rat esophagus.
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Affiliation(s)
- Kazuhiro Horii
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagaido, Gifu 501-1193, Japan
| | - Yuji Suzuki
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagaido, Gifu 501-1193, Japan
| | - Takahiko Shiina
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagaido, Gifu 501-1193, Japan
| | - Shouichiro Saito
- Department of Basic Veterinary Science, Laboratory of Anatomy, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagaido, Gifu 501-1193, Japan
| | - Sawa Onouchi
- Department of Basic Veterinary Science, Laboratory of Anatomy, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagaido, Gifu 501-1193, Japan
| | - Yuuki Horii
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagaido, Gifu 501-1193, Japan
| | - Hiroki Shimaoka
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagaido, Gifu 501-1193, Japan
| | - Yasutake Shimizu
- Department of Basic Veterinary Science, Laboratory of Physiology, The United Graduate School of Veterinary Sciences, Gifu University, 1-1 Yanagaido, Gifu 501-1193, Japan.,Center for Highly Advanced Integration of Nano and Life Sciences (G-CHAIN), Gifu University, 1-1 Yanagaido, Gifu 501-1193, Japan
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Zhan B, Huang X, Jiang L, Bao H, Cheng X. Effect of Nicorandil Administration on Preventing Contrast-Induced Nephropathy: A Meta-Analysis. Angiology 2017; 69:568-573. [PMID: 28950711 DOI: 10.1177/0003319717732237] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Several studies have investigated the effect of nicorandil on contrast-induced nephropathy (CIN) in patients undergoing coronary angiography (CAG) or percutaneous coronary intervention (PCI). However, the final results of these trials are not identical. This meta-analysis evaluated the role of nicorandil administration on CIN prevention. We searched databases to find randomized controlled trial (RCT) comparing nicorandil with hydration versus conventional hydration therapy on preventing CIN. Finally, 5 articles (805 patients) were included in our meta-analysis; the data showed that nicorandil was related to significant reduction in the risk of CIN (risk ratio = 0.37, 95% confidence interval [CI]: 0.22-0.61, P = .0001). We found not only the cystatin C level after operation was nonsignificant between 2 groups at the first 24 hours ( P = .65, 95% CI = −0.06 to 0.04) and 48 hours ( P = .19, 95% CI = −0.11 to 0.02) but also the serum creatinine level was nonsignificantly elevated, at 24 hours ( P = .46, 95% CI = −5.19 to 1.88) and 72 hours ( P = .49, 95% CI = −0.49 to 0.34). Our analysis suggested that the nicorandil treatment compared with conventional hydration can significantly reduce the risk of CIN.
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Affiliation(s)
- Biming Zhan
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Xiao Huang
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Long Jiang
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Huihui Bao
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - XiaoShu Cheng
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
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