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Effects of highly selective sympathectomy on neurogenic bowel dysfunction in spinal cord injury rats. Sci Rep 2021; 11:15892. [PMID: 34354119 PMCID: PMC8342507 DOI: 10.1038/s41598-021-95158-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 07/21/2021] [Indexed: 11/24/2022] Open
Abstract
Neurogenic bowel dysfunction, including hyperreflexic and areflexic bowel, is a common complication in patients with spinal cord injury (SCI). We hypothesized that removing part of the colonic sympathetic innervation can alleviate the hyperreflexic bowel, and investigated the effect of sympathectomy on the hyperreflexic bowel of SCI rats. The peri-arterial sympathectomy of the inferior mesenteric artery (PSIMA) was performed in T8 SCI rats. The defecation habits of rats, the water content of fresh faeces, the intestinal transmission function, the defecation pressure of the distal colon, and the down-regulation of Alpha-2 adrenergic receptors in colon secondary to PSIMA were evaluated. The incidence of typical hyperreflexic bowel was 95% in SCI rats. Compared to SCI control rats, PSIMA increased the faecal water content of SCI rats by 5–13% (P < 0.05), the emptying rate of the faeces in colon within 24 h by 14–40% (P < 0.05), and the defecation pressure of colon by 10–11 mmHg (P < 0.05). These effects lasted for at least 12 weeks after PSIMA. Immunofluorescence label showed the secondary down-regulation of Alpha-2 adrenergic receptors after PSIMA occurred mainly in rats’ distal colon. PSIMA mainly removes the sympathetic innervation of the distal colon, and can relieve the hyperreflexic bowel in rats with SCI. The possible mechanism is to reduce the inhibitory effect of sympathetic activity, and enhance the regulatory effect of parasympathetic activity on the colon. This procedure could potentially be used for hyperreflexic bowel in patients with SCI.
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Thorsen Y, Stimec BV, Lindstrom JC, Oresland T, Ignjatovic D. Stool dynamics after extrinsic nerve injury during right colectomy with extended D3-mesenterectomy. Scand J Gastroenterol 2021; 56:770-776. [PMID: 33961527 DOI: 10.1080/00365521.2021.1918757] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
INTRODUCTION To improve oncological outcome in right colon cancer surgery, an extended mesenterectomy (D3) is under evaluation. In this procedure, all tissue anterior and posterior to the superior mesenteric vessels from the middle colic to ileocolic artery origin is removed, causing injury to the superior mesenteric nerve plexus. The aim was to study the effects of this injury on bowel dynamics and quality of life (QoL). METHODS Patients undergoing right colectomy with conventional D2- and extended D3-mesenterectomy were asked to record stool number and consistency for 60 d after surgery and complete questionnaires regarding QoL and bowel function (BF) before and after recovery from surgery. We compared early postoperative stool dynamics and long-term QoL in the groups and presented graphs depicting the temporal profile of stool numbers and consistency. RESULTS Thirty-three patients operated with a D3-resection and 12 patients with a D2-resection participated. The results revealed significantly higher stool numbers in the D3-group until day 26, with significantly more loose-watery stools until day 40. The most pronounced difference was found on day 9 (Mean difference in the total number of stools: 2.25 stools/day, p=.004. Mean difference in loose-watery stools/day: 2.81 p<.001). About 25% in the D2- and 69.7% in the D3-group reported having more than three stools/day in the early postoperative phase. There were no differences in long-term QoL and BF between the groups except in stool consistency (p=.039). DISCUSSION/CONCLUSIONS Denervation following extended D3-mesenterectomy leads to transitory reduced consistency and increased frequency. It does not affect long-term QoL or BF.
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Affiliation(s)
- Yngve Thorsen
- Department of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Gastroenterological Surgery, Akershus University Hospital, Lorenskog, Norway
| | - Bojan V Stimec
- Faculty of Medicine, Anatomy Sector, Teaching Unit, University of Geneva, Geneva, Switzerland
| | - Jonas Christoffer Lindstrom
- Department of Clinical Medicine, University of Oslo, Oslo, Norway.,Health Services Research Unit, Akershus University Hospital, Lorenskog, Norway
| | - Tom Oresland
- Department of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Gastroenterological Surgery, Akershus University Hospital, Lorenskog, Norway
| | - Dejan Ignjatovic
- Department of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Gastroenterological Surgery, Akershus University Hospital, Lorenskog, Norway
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Sinen O, Bülbül M. The role of autonomic pathways in peripheral apelin-induced gastrointestinal dysmotility: involvement of the circumventricular organs. Exp Physiol 2020; 106:475-485. [PMID: 33347671 DOI: 10.1113/ep089182] [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: 10/14/2020] [Accepted: 12/07/2020] [Indexed: 01/19/2023]
Abstract
NEW FINDINGS What is the central question of this study? Are central autonomic pathways and circumventricular organs involved in apelin-induced inhibition of gut motility? What is the main finding and its importance? Peripherally administered apelin-13 inhibits gastric and colonic motor functions through sympathetic and parasympathetic autonomic pathways, which seems to be partly mediated by the apelin receptor in circumventricular organs. ABSTRACT Peripheral administration of apelin-13 has been shown to inhibit gastrointestinal (GI) motility, but the relevant mechanisms are incompletely understood. This study aimed to investigate (i) whether the apelin receptor (APJ) is expressed in circumventricular structures involved in autonomic functions, (ii) whether they are activated by peripherally administered apelin, (iii) the role of autonomic pathways in peripheral exogenous apelin-induced GI dysmotility, and (iv) the changes in apelin levels in the extracellular environment of the brain following its peripheral application. Ninety minutes after apelin-13 administration (300 μg kg-1 , i.p.), gastric emptying (GE) and colon transit (CT) were measured in rats that underwent parasympathectomy and/or sympathectomy. Plasma and cerebrospinal fluid (CSF) samples were also collected from another group of rats that received apelin-13 or vehicle injection. The immunoreactivities for APJ and c-Fos in circumventricular organs (CVOs) were evaluated by immunohistochemistry. Compared with vehicle-treated rats, GE and CT were inhibited significantly by apelin-13 treatment, and were completely restored in animals that underwent the combination of parasympathectomy and sympathectomy and sympathectomy alone, respectively. Apelin concentrations were elevated in both plasma and CSF following peripheral administration of apelin-13. APJ expression was detected in area postrema (AP), subfornical organ and organum vasculosum of lamina terminalis, and c-Fos expression was observed in response to apelin injection. Apelin-induced c-Fos expression in AP was partially attenuated by pretreatment with the cholecystokinin-1 receptor antagonist lorglumide, whereas it was completely abolished in vagotomized rats. The present data suggest that APJ in CVOs could indirectly contribute to the inhibitory action of peripheral apelin on GI motor functions.
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Affiliation(s)
- Osman Sinen
- Faculty of Medicine, Department of Physiology, Akdeniz University, Antalya, Turkey
| | - Mehmet Bülbül
- Faculty of Medicine, Department of Physiology, Akdeniz University, Antalya, Turkey
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Okada M, Taniguchi S, Takeshima C, Taniguchi H, Kitakoji H, Itoh K, Takahashi T, Imai K. Using a radiopaque marker with radiography for evaluating colonic transit by geometric center in conscious rats: A novel method. Auton Neurosci 2020; 230:102760. [PMID: 33340814 DOI: 10.1016/j.autneu.2020.102760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 11/18/2020] [Accepted: 11/29/2020] [Indexed: 02/07/2023]
Abstract
This study developed a new method using radiopaque markers under X-ray to measure rat colonic transit by geometric center repeatedly and/or over a time series in the same individually. Additionally, the utility of this method was shown by elucidating the innervation of the autonomic nerve on colonic transit in detail with a pharmacological technique in conscious rats. An in-dwelling silastic cannula was inserted into the cecum and the proximal part was moved through the abdominal wall, where it was fixed to the posterior neck skin. Twenty markers were administered from the cannula to the proximal colon with saline on the fifth day after surgery. The markers were observed with soft X-ray before required repeated short anesthesia. Experimentation 1: Rats were measured colonic transit twice over 2 days with no administration. Experimentation 2: Rats were administered saline on the first day and pharmacology on the second day intraperitoneally before measurement. Experimentation 1: The markers administrated from the cannula and transited from proximal colon to distal colon over a time series. It showed no significant difference in complication rates between 2 days. Experimentation 2: The colonic transit was increasingly accelerated by neostigmine and phentolamine but not propranolol. Significant changes in 1.0 mg/kg atropine were noted although no differences were found between control and 0.05 mg/kg atropine and between each other's. We have presented the method using radiopaque markers under X-ray with short anesthesia for evaluating the colonic transit. The methods could show rat colonic transit changes in detail with a pharmacological technique.
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Affiliation(s)
- Misaki Okada
- Department of Acupuncture and Moxibustion, Meiji University of Integrative Medicine, Honoda, Hiyoshi-cho, Nantan-shi, Kyoto 629-0392, Japan
| | - Sazu Taniguchi
- Department of Acupuncture and Moxibustion, Meiji University of Integrative Medicine, Honoda, Hiyoshi-cho, Nantan-shi, Kyoto 629-0392, Japan; The Japan School of Acupuncture, Moxibustion and Physiotherapy, 20-1 Sakuragaoka-cho, Shibuya-ku, Tokyo 150-0031, Japan
| | - Chiaki Takeshima
- Graduate School of Acupuncture and Moxibustion, Meiji University of Integrative Medicine, Honoda, Hiyoshi-cho, Nantan-shi, Kyoto 629-0392, Japan
| | - Hiroshi Taniguchi
- Department of Acupuncture and Moxibustion, Meiji University of Integrative Medicine, Honoda, Hiyoshi-cho, Nantan-shi, Kyoto 629-0392, Japan; Department of Acupuncture and Moxibustion, Tokyo Ariake University of Medical and Health Sciences, 2-9-1 Ariake, Koto-ku, Tokyo 135-0063, Japan
| | - Hiroshi Kitakoji
- Department of Acupuncture and Moxibustion, Meiji University of Integrative Medicine, Honoda, Hiyoshi-cho, Nantan-shi, Kyoto 629-0392, Japan; Department of Acupuncture and Moxibustion, Takarazuka University of Medical and Health Care, 1 Hanayashikimidorigaoka, Takarazuka-shi, Hyogo 666-0162, Japan
| | - Kazunori Itoh
- Department of Acupuncture and Moxibustion, Meiji University of Integrative Medicine, Honoda, Hiyoshi-cho, Nantan-shi, Kyoto 629-0392, Japan
| | - Toku Takahashi
- Department of Surgery, Medical College of Wisconsin, 8701 W Watertown Plank Rd, Milwaukee, WI 53226, USA
| | - Kenji Imai
- Department of Acupuncture and Moxibustion, Meiji University of Integrative Medicine, Honoda, Hiyoshi-cho, Nantan-shi, Kyoto 629-0392, Japan; Department of Acupuncture and Moxibustion, Faculty of Health Science, Teikyo Heisei University, 2-51-4 Higashi-ikebukuro, Toshima-ku, Tokyo 170-8445, Japan.
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Chino D, Sone T, Yamazaki K, Tsuruoka Y, Yamagishi R, Shiina S, Obara K, Yamaki F, Higai K, Tanaka Y. Pharmacological identification of β-adrenoceptor subtypes mediating isoprenaline-induced relaxation of guinea pig colonic longitudinal smooth muscle. J Smooth Muscle Res 2018. [PMID: 29540623 PMCID: PMC5863046 DOI: 10.1540/jsmr.54.13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Object We aimed to identify the β-adrenoceptor (β-AR) subtypes involved in isoprenaline-induced relaxation of guinea pig colonic longitudinal smooth muscle using pharmacological and biochemical approaches. Methods Longitudinal smooth muscle was prepared from the male guinea pig ascending colon and contracted with histamine prior to comparing the relaxant responses to three catecholamines (isoprenaline, adrenaline, and noradrenaline). The inhibitory effects of subtype-selective β-AR antagonists on isoprenaline-induced relaxation were then investigated. Results The relaxant potencies of the catecholamines were ranked as: isoprenaline > noradrenaline ≈ adrenaline, whereas the rank order was isoprenaline > noradrenaline > adrenaline in the presence of propranolol (a non-selective β-AR antagonist; 3 × 10-7 M). Atenolol (a selective β1-AR antagonist; 3 × 10-7-10-6 M) acted as a competitive antagonist of isoprenaline-induced relaxation, and the pA2 value was calculated to be 6.49 (95% confidence interval: 6.34-6.83). The relaxation to isoprenaline was not affected by ICI-118,551 (a selective β2-AR antagonist) at 10-9-10-8 M, but was competitively antagonized by 10-7-3 × 10-7 M, with a pA2 value of 7.41 (95% confidence interval: 7.18-8.02). In the presence of propranolol (3 × 10-7 M), the relaxant effect of isoprenaline was competitively antagonized by bupranolol (a non-selective β-AR antagonist), with a pA2 value of 5.90 (95% confidence interval: 5.73-6.35). Conclusion These findings indicated that the β-AR subtypes involved in isoprenaline-induced relaxation of colonic longitudinal guinea pig muscles are β1-AR and β3-AR.
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Affiliation(s)
- Daisuke Chino
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-City, Chiba 274-8510, Japan.,Department of Pharmacotherapy, Faculty of Pharmaceutical Sciences, Nihon Pharmaceutical University, 10281 Komuro, Ina-machi, Kita-Adachi-gun, Saitama 362-0806, Japan
| | - Tomoyo Sone
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-City, Chiba 274-8510, Japan
| | - Kumi Yamazaki
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-City, Chiba 274-8510, Japan
| | - Yuri Tsuruoka
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-City, Chiba 274-8510, Japan
| | - Risa Yamagishi
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-City, Chiba 274-8510, Japan
| | - Shunsuke Shiina
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-City, Chiba 274-8510, Japan
| | - Keisuke Obara
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-City, Chiba 274-8510, Japan
| | - Fumiko Yamaki
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-City, Chiba 274-8510, Japan
| | - Koji Higai
- Laboratory of Medical Biochemistry, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-City, Chiba 274-8510, Japan
| | - Yoshio Tanaka
- Department of Chemical Pharmacology, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-City, Chiba 274-8510, Japan
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Tong W, Tian Y, Yang H, Wang L, Zhao S, Shi H, Dai F, Ye J. Expression of transient receptor potential ankyrin 1 correlating to the recovery of colonic transit after pelvic nerve denervation in rats. J Surg Res 2017; 209:206-210. [PMID: 28032561 DOI: 10.1016/j.jss.2016.09.057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2016] [Revised: 09/14/2016] [Accepted: 09/28/2016] [Indexed: 01/26/2023]
Affiliation(s)
- Weidong Tong
- Department of General Surgery, Colorectal Division, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, China.
| | - Yue Tian
- Department of General Surgery, Colorectal Division, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Hanyong Yang
- Department of General Surgery, Colorectal Division, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Li Wang
- Department of General Surgery, Colorectal Division, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Song Zhao
- Department of General Surgery, Colorectal Division, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Huiwen Shi
- Department of General Surgery, Colorectal Division, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Feixiang Dai
- Department of General Surgery, Colorectal Division, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, China
| | - Jingwang Ye
- Department of General Surgery, Colorectal Division, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, China.
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Ridolfi TJ, Berger N, Ludwig KA. Low Anterior Resection Syndrome: Current Management and Future Directions. Clin Colon Rectal Surg 2016; 29:239-45. [PMID: 27582649 DOI: 10.1055/s-0036-1584500] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Outcomes for rectal cancer surgery have improved significantly over the past 20 years with increasing rates of survival and recurrence, specifically local recurrence. These gains have been realized during a period of time in which there has been an increasing emphasis on sphincter preservation. As we have become increasingly aggressive in avoiding resection of the anus, we have begun accepting bowel dysfunction as a normal outcome. Low anterior resection syndrome, defined as a constellation of symptoms including incontinence, frequency, urgency, or feelings of incomplete emptying, has a significant impact on quality of life and results in many patients opting for a permanent colostomy to avoid these symptoms. In this article, we will highlight the most recent clinical and basic science research on this topic and discuss areas of future investigation.
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Affiliation(s)
- Timothy J Ridolfi
- Department of Surgery, Division of Colorectal Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Nicholas Berger
- Department of Surgery, Division of Colorectal Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Kirk A Ludwig
- Department of Surgery, Division of Colorectal Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin
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McCarthy CJ, Tomasella E, Malet M, Seroogy KB, Hökfelt T, Villar MJ, Gebhart GF, Brumovsky PR. Axotomy of tributaries of the pelvic and pudendal nerves induces changes in the neurochemistry of mouse dorsal root ganglion neurons and the spinal cord. Brain Struct Funct 2015; 221:1985-2004. [PMID: 25749859 DOI: 10.1007/s00429-015-1019-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 02/24/2015] [Indexed: 12/31/2022]
Abstract
Using immunohistochemical techniques, we characterized changes in the expression of several neurochemical markers in lumbar 4-sacral 2 (L4-S2) dorsal root ganglion (DRG) neuron profiles (NPs) and the spinal cord of BALB/c mice after axotomy of the L6 and S1 spinal nerves, major tributaries of the pelvic (targeting pelvic visceral organs) and pudendal (targeting perineum and genitalia) nerves. Sham animals were included. Expression of cyclic AMP-dependent transcription factor 3 (ATF3), calcitonin gene-related peptide (CGRP), transient receptor potential cation channel subfamily V, member 1 (TRPV1), tyrosine hydroxylase (TH) and vesicular glutamate transporters (VGLUT) types 1 and -2 was analysed seven days after injury. L6-S1 axotomy induced dramatic de novo expression of ATF3 in many L6-S1 DRG NPs, and parallel significant downregulations in the percentage of CGRP-, TRPV1-, TH- and VGLUT2-immunoreactive (IR) DRG NPs, as compared to their expression in uninjured DRGs (contralateral L6-S1-AXO; sham mice); VGLUT1 expression remained unaltered. Sham L6-S1 DRGs only showed a small ipsilateral increase in ATF3-IR NPs (other markers were unchanged). L6-S1-AXO induced de novo expression of ATF3 in several lumbosacral spinal cord motoneurons and parasympathetic preganglionic neurons; in sham mice the effect was limited to a few motoneurons. Finally, a moderate decrease in CGRP- and TRPV1-like-immunoreactivities was observed in the ipsilateral superficial dorsal horn neuropil. In conclusion, injury of a mixed visceral/non-visceral nerve leads to considerable neurochemical alterations in DRGs matched, to some extent, in the spinal cord. Changes in these and potentially other nociception-related molecules could contribute to pain due to injury of nerves in the abdominopelvic cavity.
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Affiliation(s)
- Carly J McCarthy
- Faculty of Biomedical Sciences, School of Biomedical Sciences, Austral University, Av. Juan D. Perón 1500, Pilar, B1629AHJ, Buenos Aires, Argentina
| | - Eugenia Tomasella
- Faculty of Biomedical Sciences, School of Biomedical Sciences, Austral University, Av. Juan D. Perón 1500, Pilar, B1629AHJ, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Mariana Malet
- Faculty of Biomedical Sciences, School of Biomedical Sciences, Austral University, Av. Juan D. Perón 1500, Pilar, B1629AHJ, Buenos Aires, Argentina.,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina
| | - Kim B Seroogy
- Department of Neurology, University of Cincinnati, Cincinnati, OH, 45267, USA
| | - Tomas Hökfelt
- Department of Neuroscience, Karolinska Institutet, 17177, Stockholm, Sweden
| | - Marcelo J Villar
- Faculty of Biomedical Sciences, School of Biomedical Sciences, Austral University, Av. Juan D. Perón 1500, Pilar, B1629AHJ, Buenos Aires, Argentina
| | - G F Gebhart
- Department of Anesthesiology, Center for Pain Research, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Pablo R Brumovsky
- Faculty of Biomedical Sciences, School of Biomedical Sciences, Austral University, Av. Juan D. Perón 1500, Pilar, B1629AHJ, Buenos Aires, Argentina. .,Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina. .,Department of Anesthesiology, Center for Pain Research, University of Pittsburgh, Pittsburgh, PA, 15213, USA.
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Gribovskaja-Rupp I, Babygirija R, Takahashi T, Ludwig K. Autonomic nerve regulation of colonic peristalsis in Guinea pigs. J Neurogastroenterol Motil 2014; 20:185-96. [PMID: 24847719 PMCID: PMC4015210 DOI: 10.5056/jnm.2014.20.2.185] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 12/28/2013] [Accepted: 12/29/2013] [Indexed: 12/16/2022] Open
Abstract
Background/Aims Colonic peristalsis is mainly regulated via intrinsic neurons in guinea pigs. However, autonomic regulation of colonic motility is poorly understood. We explored a guinea pig model for the study of extrinsic nerve effects on the distal colon. Methods Guinea pigs were sacrificed, their distal colons isolated, preserving pelvic nerves (PN) and inferior mesenteric ganglia (IMG), and placed in a tissue bath. Fecal pellet propagation was conducted during PN and IMG stimulation at 10 Hz, 0.5 ms and 5 V. Distal colon was connected to a closed circuit system, and colonic motor responses were measured during PN and IMG stimulation. Results PN stimulation increased pellet velocity to 24.6 ± 0.7 mm/sec (n = 20), while IMG stimulation decreased it to 2.0 ± 0.2 mm/sec (n = 12), compared to controls (13.0 ± 0.7 mm/sec, P < 0.01). In closed circuit experiments, PN stimulation increased the intraluminal pressure, which was abolished by atropine (10−6 M) and hexamethonium (10−4 M). PN stimulation reduced the incidence of non-coordinated contractions induced by NG-nitro-L-arginine methyl ester (L-NAME; 10−4 M). IMG stimulation attenuated intraluminal pressure increase, which was partially reversed by alpha-2 adrenoceptor antagonist (yohimbine; 10−6 M). Conclusions PN and IMG input determine speed of pellet progression and peristaltic reflex of the guinea pig distal colon. The stimulatory effects of PN involve nicotinic, muscarinic and nitrergic pathways. The inhibitory effects of IMG stimulation involve alpha-2 adrenoceptors.
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Affiliation(s)
- Irena Gribovskaja-Rupp
- Department of Surgery, Medical College of Wisconsin and Zablocki VA Medical Center, Milwaukee, WI, USA
| | - Reji Babygirija
- Department of Surgery, Medical College of Wisconsin and Zablocki VA Medical Center, Milwaukee, WI, USA
| | - Toku Takahashi
- Department of Surgery, Medical College of Wisconsin and Zablocki VA Medical Center, Milwaukee, WI, USA
| | - Kirk Ludwig
- Department of Surgery, Medical College of Wisconsin and Zablocki VA Medical Center, Milwaukee, WI, USA
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Kwak JM, Babygirija R, Gribovskaja-Rupp I, Takahashi T, Yamato S, Ludwig K. Regional difference in colonic motility response to electrical field stimulation in Guinea pig. J Neurogastroenterol Motil 2013; 19:192-203. [PMID: 23667750 PMCID: PMC3644655 DOI: 10.5056/jnm.2013.19.2.192] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 02/21/2013] [Accepted: 03/03/2013] [Indexed: 12/16/2022] Open
Abstract
Background/Aims In isolated guinea-pig colon, we investigated regional differences in peristalsis evoked by intrinsic electrical nerve stimulation. Methods Four colonic segments from mid and distal colon of Hartley guinea pigs, were mounted horizontally in an organ bath. Measurement of pellet propulsion time, intraluminal pressure, electrical field stimulation (EFS; 0.5 ms, 60 V, 10 Hz), and response of pharmacological antagonists, were performed to isolated segments of colon to determine the mechanisms underlying peristaltic reflexes evoked by focal electrical nerve stimuli. Results In fecal pellet propulsion study, the velocity of pellet propulsion was significantly faster in the distal colon and decreased gradually to the proximal part of the mid colon. Intraluminal pressure recording studies showed that luminal infusion initiated normal peristaltic contractions (PCs) in 82% trials of the distal colon, compared to that of mid colon. In response to EFS, the incidence of PCs was significantly increased in the distal colon in contrast, the incidence of non-peristaltic contractions (NPCs) was significantly higher in the middle-mid colon, distal-mid colon and distal colon, compared to that of proximal-mid colon. Addition of L-NAME into the bath increased the frequency of NPCs. EFS failed to cause any PCs or NPCs contractions in the presence of hexamethonium, atropine or tetrodotoxin. Conclusions This study has revealed that electrical nerve stimulation of distal colon is the most likely region to elicit a peristaltic wave, compared with the mid or proximal colon. Our findings suggest that EFS-evoked PCs can be modulated by endogenous nitric oxide.
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Affiliation(s)
- Jung Myun Kwak
- Department of Surgery, Medical College of Wisconsin and Zablocki VA Medical Center, Milwaukee, WI, USA. ; Department of Surgery, College of Medicine, Korea University, Seoul, Korea
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Gribovskaja-Rupp I, Takahashi T, Ridolfi T, Kosinski L, Ludwig K. Upregulation of mucosal 5-HT3 receptors is involved in restoration of colonic transit after pelvic nerve transection. Neurogastroenterol Motil 2012; 24:472-8, e218. [PMID: 22304456 DOI: 10.1111/j.1365-2982.2012.01890.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Colonic dysfunction occurs after pelvic autonomic nerve damage. The enteric nervous system can compensate. We investigated the role of mucosal serotonin receptors, 5-HT(3) and 5-HT(4) , in the colonic motility restoration over 2 weeks after parasympathetic pelvic nerve transection in a rat model. METHODS Male Sprague-Dawley rats underwent pelvic nerve transection or sham operation. Colonic transit was expressed as the geometric center of (51) Cr distribution. Mucosal 5-HT(3) and 5-HT(4) receptor expression was evaluated by Western blot. Intraluminal pressure increase was measured after 5-HT(3) (ondansetron) or 5-HT(4) receptor antagonist (GR125487) administration in vitro in sham and denervated distal colons. KEY RESULTS At 2 weeks, colonic transit in the denervated group was 30% slower compared to the sham group (P < 0.01). At 1 and 2 weeks, 5-HT(3) receptor expression was increased two-fold in the denervated group, compared to shams (P < 0.05). A three-fold smaller dose of ondansetron was required in denervated tissues to inhibit intraluminal pressure rise than in sham colons (P < 0.01). There was no difference in the expression of 5-HT(4) receptor or the response to GR125487 in denervated vs sham colons. CONCLUSIONS & INFERENCES Colonic motility was restored to approximately 70% normal over 1 week without further improvement at 2 weeks. Enteric nervous system compensated by upregulating mucosal 5-HT(3,) but not 5-HT(4,) receptors.
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Affiliation(s)
- I Gribovskaja-Rupp
- Department of Surgery, Medical College of Wisconsin, Clement J Zablocki VA Medical Center, Milwaukee, WI, USA
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