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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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Kim DH, Yun HY, Song YJ, Ryu DH, Han HS, Han JH, Kim KB, Yoon SM, Youn SJ. Clinical features of gastric emptying after distal gastrectomy. Ann Surg Treat Res 2017; 93:310-315. [PMID: 29250510 PMCID: PMC5729125 DOI: 10.4174/astr.2017.93.6.310] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Revised: 05/01/2017] [Accepted: 05/19/2017] [Indexed: 11/30/2022] Open
Abstract
Purpose Gastric emptying may influence the quality of life of patients who undergo distal gastrectomy. Little is known, however, about gastric emptying after distal gastrectomy. The aim of our study was to investigate gastric emptying patterns after distal gastrectomy. Methods This gastric-emptying study investigated patients who underwent distal gastrectomy in the 6 months or more before May 2008 to July 2013 at Chungbuk National University Hospital with a study sample of 205 patients. We analyzed patterns of gastric emptying. Results Delayed gastric emptying was found in 109 of the 205 patients (53.2%). Food stasis was more frequent in a group with delayed gastric emptying. In multivariate analysis, risk factors for gastroparesis were laparoscopic operation (hazard ratio [HR], 2.731; P = 0.008) and duration of less than 24 months after distal gastrectomy (HR, 2.795; P = 0.001). Delayed gastric emptying tended to decrease with duration of the postoperative period. Conclusion Delayed gastric emptying is common in distal gastrectomy, and is related to laparoscopic operation and duration of the postoperative period. Food stasis was more frequent in a group with delayed gastric emptying.
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Affiliation(s)
- Dae Hoon Kim
- Department of Surgery, Chungbuk National University College of Medicine, Cheongju, Korea.,Department of Surgery, Chungbuk National University Hospital, Cheongju, Korea
| | - Hyo Yung Yun
- Department of Surgery, Chungbuk National University College of Medicine, Cheongju, Korea.,Department of Surgery, Chungbuk National University Hospital, Cheongju, Korea
| | - Young-Jin Song
- Department of Surgery, Chungbuk National University College of Medicine, Cheongju, Korea.,Department of Surgery, Chungbuk National University Hospital, Cheongju, Korea
| | - Dong Hee Ryu
- Department of Surgery, Chungbuk National University College of Medicine, Cheongju, Korea.,Department of Surgery, Chungbuk National University Hospital, Cheongju, Korea
| | - Hye-Suk Han
- Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Korea.,Department of Internal Medicine, Chungbuk National University Hospital, Cheongju, Korea
| | - Joung-Ho Han
- Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Korea.,Department of Internal Medicine, Chungbuk National University Hospital, Cheongju, Korea
| | - Ki Bae Kim
- Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Korea.,Department of Internal Medicine, Chungbuk National University Hospital, Cheongju, Korea
| | - Soon Man Yoon
- Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Korea.,Department of Internal Medicine, Chungbuk National University Hospital, Cheongju, Korea
| | - Sei Jin Youn
- Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Korea.,Department of Internal Medicine, Chungbuk National University Hospital, Cheongju, Korea
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Lee SE, Kim DH, Kim YC, Han JH, Choi W, Kim CH, Jeong HW, Park SM, Yun SJ, Choi SY, Sung R, Kim YH, Yoo RY, Sun PH, Kim H, Song YJ, Xu WX, Yun HY, Lee SJ. H2 Receptor-Mediated Relaxation of Circular Smooth Muscle in Human Gastric Corpus: the Role of Nitric Oxide (NO). THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2014; 18:425-30. [PMID: 25352763 PMCID: PMC4211127 DOI: 10.4196/kjpp.2014.18.5.425] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 07/21/2014] [Accepted: 07/21/2014] [Indexed: 11/26/2022]
Abstract
This study was designed to examine the effects of histamine on gastric motility and its specific receptor in the circular smooth muscle of the human gastric corpus. Histamine mainly produced tonic relaxation in a concentration-dependent and reversible manner, although histamine enhanced contractility in a minor portion of tissues tested. Histamine-induced tonic relaxation was nerve-insensitive because pretreatment with nerve blockers cocktail (NBC) did not inhibit relaxation. Additionally, K+ channel blockers, such as tetraethylammonium (TEA), apamin (APA), and glibenclamide (Glib), had no effect. However, NG-nitro-L-arginine methyl ester (L-NAME) and 1H-(1,2,4)oxadiazolo (4,3-A) quinoxalin-1-one (ODQ), an inhibitor of soluble guanylate cyclase (sGC), did inhibit histamine-induced tonic relaxation. In particular, histamine-induced tonic relaxation was converted to tonic contraction by pretreatment with L-NAME. Ranitidine, the H2 receptor blocker, inhibited histamine-induced tonic relaxation. These findings suggest that histamine produced relaxation in circular smooth muscle of human gastric smooth muscle through H2 receptor and NO/sGC pathways.
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Affiliation(s)
- Sang Eok Lee
- Department of Surgery, Konyang University Hospital, Daejeon 302-718, Korea
| | - Dae Hoon Kim
- Department of Surgery, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Young Chul Kim
- Department of Physiology, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Joung-Ho Han
- Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Woong Choi
- Department of Pharmacology, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Chan Hyung Kim
- Department of Pharmacology, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Hye Won Jeong
- Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Seon-Mee Park
- Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Sei Jin Yun
- Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Song-Yi Choi
- Department of Pathology, Chungnam National University School of Medicine, Daejeon 305-764, Korea
| | - Rohyun Sung
- Department of Pathology, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Young Ho Kim
- Department of Otolaryngology, Seoul National University, Borame Medical Center, Seoul 156-707, Korea
| | - Ra Young Yoo
- Department of Physiology, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Park Hee Sun
- Department of Physiology, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Heon Kim
- Department of Preventing Medicine, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Young-Jin Song
- Department of Surgery, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Wen-Xie Xu
- Department of Physiology, College of Medcine, Shanghai Jiaotong University, Shanghai 200240, P.R. China
| | - Hyo-Yung Yun
- Department of Surgery, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
| | - Sang Jin Lee
- Department of Physiology, Chungbuk National University College of Medicine, Cheongju 361-763, Korea
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