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Tiwari N, Qiao LY. Sex Differences in Visceral Pain and Comorbidities: Clinical Outcomes, Preclinical Models, and Cellular and Molecular Mechanisms. Cells 2024; 13:834. [PMID: 38786056 PMCID: PMC11119472 DOI: 10.3390/cells13100834] [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: 03/19/2024] [Revised: 05/03/2024] [Accepted: 05/10/2024] [Indexed: 05/25/2024] Open
Abstract
Sexual dimorphism of visceral pain has been documented in clinics and experimental animal models. Aside from hormones, emerging evidence suggests the sex-differential intrinsic neural regulation of pain generation and maintenance. According to the International Association for the Study of Pain (IASP) and the American College of Gastroenterology (ACG), up to 25% of the population have visceral pain at any one time, and in the United States 10-15 percent of adults suffer from irritable bowel syndrome (IBS). Here we examine the preclinical and clinical evidence of sex differences in visceral pain focusing on IBS, other forms of bowel dysfunction and IBS-associated comorbidities. We summarize preclinical animal models that provide a means to investigate the underlying molecular mechanisms in the sexual dimorphism of visceral pain. Neurons and nonneuronal cells (glia and immune cells) in the peripheral and central nervous systems, and the communication of gut microbiota and neural systems all contribute to sex-dependent nociception and nociplasticity in visceral painful signal processing. Emotion is another factor in pain perception and appears to have sexual dimorphism.
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Affiliation(s)
- Namrata Tiwari
- Department of Physiology and Biophysics, Virginia Commonwealth University School of Medicine, Richmond, VA 23298, USA
- Department of Internal Medicine, Virginia Commonwealth University School of Medicine, Richmond, VA 23298, USA
| | - Liya Y. Qiao
- Department of Physiology and Biophysics, Virginia Commonwealth University School of Medicine, Richmond, VA 23298, USA
- Department of Internal Medicine, Virginia Commonwealth University School of Medicine, Richmond, VA 23298, USA
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2
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Sawada A, Zhang M, Ustaoglu A, Nikaki K, Lee C, Woodland P, Yazaki E, Takashima S, Ominami M, Tanaka F, Ciafardini C, Nachman F, Ditaranto A, Agotegaray J, Bilder C, Savarino E, Gyawali CP, Penagini R, Fujiwara Y, Sifrim D. Superficial oesophageal mucosal innervation may contribute to severity of symptoms in oesophageal motility disorders. Aliment Pharmacol Ther 2024; 59:100-112. [PMID: 37845817 DOI: 10.1111/apt.17773] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 08/31/2023] [Accepted: 10/07/2023] [Indexed: 10/18/2023]
Abstract
BACKGROUND Mechanisms underlying perception of dysphagia and chest pain have not been completely elucidated, although oesophageal mucosal afferent nerves might play an important role. AIMS To evaluate the relationship between oesophageal mucosal afferent nerves and the severity of dysphagia and chest pain in oesophageal motility disorders. METHODS We prospectively recruited patients with oesophageal motility disorders having dysphagia and/or chest pain from whom oesophageal biopsies were obtained. High-resolution manometry classified patients into disorders of oesophagogastric junction (OGJ) outflow and disorders of peristalsis. Symptom severity was assessed using validated questionnaires including Brief Oesophageal Dysphagia Questionnaire (BEDQ). Immunohistochemistry was performed on oesophageal biopsies to evaluate the location of calcitonin gene-related peptide (CGRP)-immunoreactive mucosal afferent nerves. Findings were compared to existing data from 10 asymptomatic healthy volunteers. RESULTS Of 79 patients, 61 patients had disorders of OGJ outflow and 18 had disorders of peristalsis. CGRP-immunoreactive mucosal nerves were more superficially located in the mucosa of patients with oesophageal motility disorders compared to healthy volunteers. Within disorders of OGJ outflow, the location of CGRP-immunoreactive nerves negatively correlated with BEDQ score both in the proximal (ρ = -0.567, p < 0.001) and distal oesophagus (ρ = -0.396, p = 0.003). In the proximal oesophagus, strong chest pain was associated with more superficially located mucosal nerves than weak chest pain (p = 0.04). Multivariate analysis showed superficial nerves in the proximal oesophagus was independently associated with severe dysphagia in disorders of OGJ outflow (p = 0.008). CONCLUSIONS Superficial location of mucosal nerves in the proximal oesophagus might contribute to symptoms, especially severe dysphagia, in disorders of OGJ outflow.
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Affiliation(s)
- Akinari Sawada
- Wingate Institute of Neurogastroenterology, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK
- Department of Gastroenterology, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Mengyu Zhang
- Wingate Institute of Neurogastroenterology, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK
| | - Ahsen Ustaoglu
- Wingate Institute of Neurogastroenterology, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK
| | - Kornilia Nikaki
- Wingate Institute of Neurogastroenterology, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK
| | - Chung Lee
- Wingate Institute of Neurogastroenterology, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK
| | - Philip Woodland
- Wingate Institute of Neurogastroenterology, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK
| | - Etsuro Yazaki
- Wingate Institute of Neurogastroenterology, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK
| | - Shingo Takashima
- Department of Gastroenterology, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Masaki Ominami
- Department of Gastroenterology, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Fumio Tanaka
- Department of Gastroenterology, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Clorinda Ciafardini
- Gastroenterology and Endoscopy Unit, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Fabio Nachman
- Fundacion Favaloro Hospital, Buenos Aires, Argentina
| | | | | | | | - Edoardo Savarino
- Gastroenterology Unit, Department of Surgery, Oncology and Gastroenterology, University of Padua, Padua, Italy
| | - C Prakash Gyawali
- Division of Gastroenterology, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Roberto Penagini
- Gastroenterology and Endoscopy Unit, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Milan, Italy
- Department of Pathophysiology and Transplantation, University of Milan, Italy
| | - Yasuhiro Fujiwara
- Department of Gastroenterology, Osaka Metropolitan University Graduate School of Medicine, Osaka, Japan
| | - Daniel Sifrim
- Wingate Institute of Neurogastroenterology, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, UK
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Singh A. Brain-derived neurotrophic factor - a key player in the gastrointestinal system. PRZEGLAD GASTROENTEROLOGICZNY 2023; 18:380-392. [PMID: 38572454 PMCID: PMC10985741 DOI: 10.5114/pg.2023.132957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Accepted: 08/24/2023] [Indexed: 04/05/2024]
Abstract
Brain-derived neurotrophic factor (BDNF) is highly expressed throughout the gastrointestinal (GI) tract and plays a critical role in the regulation of intestinal motility, secretion, sensation, immunity, and mucosal integrity. Dysregulation of BDNF signalling has been implicated in the pathophysiology of various GI disorders including inflammatory bowel disease, irritable bowel syndrome, functional dyspepsia, and diabetic gastroenteropathy. This review provides a comprehensive overview of BDNF localization, synthesis, receptors, and signalling mechanisms in the gut. In addition, current evidence on the diverse physiologic and pathophysiologic roles of BDNF in the control of intestinal peristalsis, mucosal transport processes, visceral sensation, neuroimmune interactions, gastrointestinal mucosal healing, and enteric nervous system homeostasis are discussed. Finally, the therapeutic potential of targeting BDNF for the treatment of functional GI diseases is explored. Advancing knowledge of BDNF biology and mechanisms of action may lead to new therapies based on harnessing the gut trophic effects of this neurotrophin.
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Affiliation(s)
- Arjun Singh
- Department of Medicine, Division of Gastroenterology and Hepatology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania, United States
- Molecular Pharmacology Program and Chemistry, Memorial Sloan Kettering Cancer Center, New York, United States
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Noor-Mohammadi E, Ligon CO, Mackenzie KD, Stratton J, Shnider SJ, Greenwood-Van Meerveld B. Antinociceptive Effects of an Anti-CGRP Antibody in Rat Models of Colon-Bladder Cross-Organ Sensitization. J Pharmacol Exp Ther 2023; 387:4-14. [PMID: 37164371 DOI: 10.1124/jpet.122.001480] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 04/10/2023] [Accepted: 04/22/2023] [Indexed: 05/12/2023] Open
Abstract
Irritable bowel syndrome (IBS) and bladder pain syndrome/interstitial cystitis (BPS/IC) are comorbid visceral pain disorders seen commonly in women with unknown etiology and limited treatment options and can involve visceral organ cross-sensitization. Calcitonin gene-related peptide (CGRP) is a mediator of nociceptive processing and may serve as a target for therapy. In three rodent models, we employed a monoclonal anti-CGRP F(ab')2 to investigate the hypothesis that visceral organ cross-sensitization is mediated by abnormal CGRP signaling. Visceral organ cross-sensitization was induced in adult female rats via transurethral infusion of protamine sulfate (PS) into the urinary bladder or infusion into the colon of trinitrobenzene sulfonic acid (TNBS). Colonic sensitivity was assessed via the visceromotor response to colorectal distension (CRD). Bladder sensitivity was assessed as the frequency of abdominal withdrawal reflexes to von Frey filaments applied to the suprapubic region. PS- or TNBS-induced changes in colonic and bladder permeability were investigated in vitro via quantification of transepithelial electrical resistance (TEER). Peripheral administration of an anti-CGRP F(ab')2 inhibited PS-induced visceral pain behaviors and colon hyperpermeability. Similarly, TNBS-induced pain behaviors and colon and bladder hyperpermeability were attenuated by anti-CGRP F(ab')2 treatment. PS into the bladder or TNBS into the colon significantly increased the visceromotor response to CRD and abdominal withdrawal reflexes to suprapubic stimulation and decreased bladder and colon TEER. These findings suggest an important role of peripheral CGRP in visceral nociception and organ cross-sensitization and support the evaluation of CGRP as a therapeutic target for visceral pain in patients with IBS and/or BPS/IC. SIGNIFICANCE STATEMENT: A monoclonal antibody against calcitonin gene-related peptide (CGRP) was found to reduce concomitant colonic and bladder hypersensitivity and hyperpermeability. The results of this study suggest that CGRP-targeting antibodies, in addition to migraine prevention, may provide a novel treatment strategy for multiorgan abdominopelvic pain following injury or inflammation.
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Affiliation(s)
- Ehsan Noor-Mohammadi
- Department of Physiology (E.N.-M., C.O.L., B.G.-V.M.), University of Oklahoma Health Science Center, Oklahoma City, Oklahoma; and TEVA Pharmaceuticals Ltd. (K.D.M., J.S., S.J.S.), Redwood City, California
| | - Casey O Ligon
- Department of Physiology (E.N.-M., C.O.L., B.G.-V.M.), University of Oklahoma Health Science Center, Oklahoma City, Oklahoma; and TEVA Pharmaceuticals Ltd. (K.D.M., J.S., S.J.S.), Redwood City, California
| | - Kimberly D Mackenzie
- Department of Physiology (E.N.-M., C.O.L., B.G.-V.M.), University of Oklahoma Health Science Center, Oklahoma City, Oklahoma; and TEVA Pharmaceuticals Ltd. (K.D.M., J.S., S.J.S.), Redwood City, California
| | - Jennifer Stratton
- Department of Physiology (E.N.-M., C.O.L., B.G.-V.M.), University of Oklahoma Health Science Center, Oklahoma City, Oklahoma; and TEVA Pharmaceuticals Ltd. (K.D.M., J.S., S.J.S.), Redwood City, California
| | - Sara J Shnider
- Department of Physiology (E.N.-M., C.O.L., B.G.-V.M.), University of Oklahoma Health Science Center, Oklahoma City, Oklahoma; and TEVA Pharmaceuticals Ltd. (K.D.M., J.S., S.J.S.), Redwood City, California
| | - Beverley Greenwood-Van Meerveld
- Department of Physiology (E.N.-M., C.O.L., B.G.-V.M.), University of Oklahoma Health Science Center, Oklahoma City, Oklahoma; and TEVA Pharmaceuticals Ltd. (K.D.M., J.S., S.J.S.), Redwood City, California
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Liu B, Liu Y, Li S, Chen P, Zhang J, Feng L. BDNF promotes mouse follicular development and reverses ovarian aging by promoting cell proliferation. J Ovarian Res 2023; 16:83. [PMID: 37106468 PMCID: PMC10134588 DOI: 10.1186/s13048-023-01163-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 04/16/2023] [Indexed: 04/29/2023] Open
Abstract
BACKGROUND Brain-derived neurotrophic factor (BDNF) plays an important role in ovarian function including follicle development and oocyte maturation, and embryonic development. However, whether BDNF treatment can reimpose ovarian aging and impaired fertility remains elusive. In this study, we investigated the reproductive outcomes of BDNF treatment and potential mechanisms in aged mice. METHOD "Aged" mice (35-37 weeks old, n = 68) were treated with recombinant human BDNF protein (rhBDNF, 1 µg/200 µL) through daily intraperitoneal (IP) injection for 10 days with/without ovulation induction. Reproductive age mice (8-10 weeks old, n = 28) were treated with ANA 12 (a selective BDNF receptor, TrkB antagonist) through daily IP injection for 5 days with/without ovulation induction. Ovarian function was assessed by ovarian weight, number of follicles, and sex hormone productions. Following induction of ovulation, the number of total oocytes or abnormal oocytes, and blastocyst formation were assessed. Reproductive functions of the mice were evaluated, including pregnancy rate, mating duration for conception, implantation sites, litter size, and weight of offspring. Finally, the molecular mechanism of the effects of BDNF on ovarian cell functions in mice were examined by Western blot and immunofluorescence. RESULTS rhBDNF treatment increased the ovarian weight, number of follicles, number and quality of oocytes including increased blastocysts formation, blood estrogen levels, and pregnancy rate in 35-37-week-old mice. Conversely, BDNF receptor antagonist, ANA 12, treatment decreased the ovarian volume and number of antral follicles and increased the proportion of abnormal oocytes in 8-10-week-old mice. We further demonstrated that BDNF treatment promoted ovarian cell proliferation as well as activation of TrkB and cyclinD1-creb signalling. CONCLUSION We demonstrated that ten consecutive days of daily IP injection of rhBDNF rescued ovarian function in aged mice. Our results further indicate that TrkB and cyclin D1-creb signaling may underlie the BDNF function in ovaries. Targeting BDNF-TrkB signaling is a potential novel therapeutic strategy to reverse ovarian aging.
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Affiliation(s)
- Bin Liu
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
- Department of Reproduction, Xinhua Hospital, School of Medicine, Shanghai Jiao-Tong University, Shanghai, China
| | - Yongjie Liu
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Shuman Li
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Pingping Chen
- Department of Reproduction, Xinhua Hospital, School of Medicine, Shanghai Jiao-Tong University, Shanghai, China
| | - Jun Zhang
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
| | - Liping Feng
- Department of Obstetrics and Gynaecology, Duke University, Durham, NC, USA.
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Patton EA, Cunningham P, Noneman M, Helms HP, Martinez-Muniz G, Sumal AS, Dhameja MK, Unger CA, Alahdami AK, Enos RT, Chatzistamou I, Velázquez KT. Acute Administration of Ojeok-san Ameliorates Pain-like Behaviors in Pre-Clinical Models of Inflammatory Bowel Diseases. Nutrients 2023; 15:nu15071559. [PMID: 37049400 PMCID: PMC10096710 DOI: 10.3390/nu15071559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/20/2023] [Accepted: 03/21/2023] [Indexed: 04/14/2023] Open
Abstract
(1) Background: Gastrointestinal pain and fatigue are the most reported concerns of patients with inflammatory bowel disease (IBD). Commonly prescribed drugs focus on decreasing excessive inflammation. However, up to 20% of IBD patients in an "inactive" state experience abdominal pain. The medicinal herb Ojeok-san (OJS) has shown promise in the amelioration of visceral pain. However, no research on OJS has been conducted in preclinical models of IBD. The mechanism by which OJS promotes analgesia is still elusive, and it is unclear if OJS possesses addictive properties. (2) Aims: In this study, we examined the potential of OJS to promote analgesic effects and rewarding behavior. Additionally, we investigated if tumor necrosis factor alpha (TNFα) from macrophages is a primary culprit of IBD-induced nociception. (3) Methods: Multiple animal models of IBD were used to determine if OJS can reduce visceral nociception. TNFα-macrophage deficient mice were used to investigate the mechanism of action by which OJS reduces nociceptive behavior. Mechanical sensitivity and operant conditioning tests were used to determine the analgesic and rewarding effects of OJS. Body weight, colon length/weight, blood in stool, colonic inflammation, and complete blood count were assessed to determine disease progression. (4) Results: OJS reduced the evoked mechanical nociception in the dextran sulphate sodium model of colitis and IL-10 knockout (KO) mice and delayed aversion to colorectal distension in C57BL/6 mice. No rewarding behavior was observed in OJS-treated IL-10 KO and mdr1a KO mice. The analgesic effects of OJS are independent of macrophage TNFα levels and IBD progression. (5) Conclusions: OJS ameliorated elicited mechanical and visceral nociception without producing rewarding effects. The analgesic effects of OJS are not mediated by macrophage TNFα.
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Affiliation(s)
- Emma A Patton
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Patrice Cunningham
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Matthew Noneman
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Henry P Helms
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Gustavo Martinez-Muniz
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Aman S Sumal
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Milan K Dhameja
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Christian A Unger
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Ahmed K Alahdami
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Reilly T Enos
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Ioulia Chatzistamou
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Kandy T Velázquez
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
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Zhang Y, Lin C, Liu Z, Sun Y, Chen M, Guo Y, Liu W, Zhang C, Chen W, Sun J, Xia R, Hu Y, Yang X, Li J, Zhang Z, Cao W, Sun S, Wang X, Ji T. Cancer cells co-opt nociceptive nerves to thrive in nutrient-poor environments and upon nutrient-starvation therapies. Cell Metab 2022; 34:1999-2017.e10. [PMID: 36395769 DOI: 10.1016/j.cmet.2022.10.012] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 08/19/2022] [Accepted: 10/26/2022] [Indexed: 11/17/2022]
Abstract
Although nutrient-starvation therapies can elicit strong anti-tumor effects in multiple carcinomas, it has been convincingly demonstrated that cancer cells exploit the tumor microenvironment to thrive in nutrient-poor environments. Here, we reveal that cancer cells can co-opt nociceptive nerves to thrive in nutrient-poor environments. Initially examining the low-glucose environment of oral mucosa carcinomas, we discovered that cancer cells employ ROS-triggered activation of c-Jun to secrete nerve growth factor (NGF), which conditions nociceptive nerves for calcitonin gene-related peptide (CGRP) production. The neurogenic CGRP subsequently induces cytoprotective autophagy in cancer cells through Rap1-mediated disruption of the mTOR-Raptor interaction. Both anti-glycolysis and anti-angiogenesis-based nutrient-starvation therapies aggravate the vicious cycle of cancer cells and nociceptive nerves and therapeutically benefit from blocking neurogenic CGRP with an FDA-approved antimigraine drug. Our study sheds light on the role of the nociceptive nerve as a microenvironmental accomplice of cancer progression in nutrient-poor environments and upon nutrient-starvation therapies.
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Affiliation(s)
- Yu Zhang
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Chengzhong Lin
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China; The 2nd Dental Center, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Zheqi Liu
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Yiting Sun
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China; Department of Oral & Cranio-Maxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Mingtao Chen
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Yibo Guo
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Wei Liu
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Chenping Zhang
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Wantao Chen
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Jian Sun
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Ronghui Xia
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China; Department of Oral Pathology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Yuhua Hu
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China; Department of Oral Pathology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Xi Yang
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Jiang Li
- College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China; Department of Oral Pathology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Zhiyuan Zhang
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Wei Cao
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Shuyang Sun
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China.
| | - Xu Wang
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China.
| | - Tong Ji
- Department of Oral Maxillofacial-Head Neck Oncology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China; College of Stomatology, Shanghai Jiao Tong University, National Center for Stomatology, National Clinical Research Center for Oral Diseases, Shanghai Key Laboratory of Stomatology, Shanghai Research Institute of Stomatology, Shanghai 200011, China.
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Electrolyzed Hydrogen Water Alleviates Abdominal Pain through Suppression of Colonic Tissue Inflammation in a Rat Model of Inflammatory Bowel Disease. Nutrients 2022; 14:nu14214451. [PMID: 36364715 PMCID: PMC9655279 DOI: 10.3390/nu14214451] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/14/2022] [Accepted: 10/20/2022] [Indexed: 01/24/2023] Open
Abstract
Inflammatory bowel disease (IBD) is characterized by chronic inflammation of the digestive tract and is typically accompanied by characteristic symptoms, such as abdominal pain, diarrhea, and bloody stool, severely deteriorating the quality of the patient's life. Electrolyzed hydrogen water (EHW) has been shown to alleviate inflammation in several diseases, such as renal disease and polymyositis/dermatomyositis. To investigate whether and how daily EHW consumption alleviates abdominal pain, the most common symptom of IBD, we examined the antioxidative and anti-inflammatory effects of EHW in an IBD rat model, wherein colonic inflammation was induced by colorectal administration of 2,4,6-trinitrobenzene sulfonic acid (TNBS). We found that EHW significantly alleviated TNBS-induced abdominal pain and tissue inflammation. Moreover, the production of proinflammatory cytokines in inflamed colon tissue was also decreased significantly. Meanwhile, the overproduction of reactive oxygen species (ROS), which is intricately involved in intestinal inflammation, was significantly suppressed by EHW. Additionally, expression of S100A9, an inflammatory biomarker of IBD, was significantly suppressed by EHW. These results suggest that the EHW prevented the overproduction of ROS due to its powerful free-radical scavenging ability and blocked the crosstalk between oxidative stress and inflammation, thereby suppressing colonic inflammation and alleviating abdominal pain.
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Shute A, Bihan DG, Lewis IA, Nasser Y. Metabolomics: The Key to Unraveling the Role of the Microbiome in Visceral Pain Neurotransmission. Front Neurosci 2022; 16:917197. [PMID: 35812241 PMCID: PMC9260117 DOI: 10.3389/fnins.2022.917197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Accepted: 05/30/2022] [Indexed: 11/29/2022] Open
Abstract
Inflammatory bowel disease (IBD), comprising Crohn's disease and Ulcerative colitis, is a relapsing and remitting disease of the gastrointestinal tract, presenting with chronic inflammation, ulceration, gastrointestinal bleeding, and abdominal pain. Up to 80% of patients suffering from IBD experience acute pain, which dissipates when the underlying inflammation and tissue damage resolves. However, despite achieving endoscopic remission with no signs of ongoing intestinal inflammation or damage, 30-50% of IBD patients in remission experience chronic abdominal pain, suggesting altered sensory neuronal processing in this disorder. Furthermore, effective treatment for chronic pain is limited such that 5-25% of IBD outpatients are treated with narcotics, with associated morbidity and mortality. IBD patients commonly present with substantial alterations to the microbial community structure within the gastrointestinal tract, known as dysbiosis. The same is also true in irritable bowel syndrome (IBS), a chronic disorder characterized by altered bowel habits and abdominal pain, in the absence of inflammation. An emerging body of literature suggests that the gut microbiome plays an important role in visceral hypersensitivity. Specific microbial metabolites have an intimate relationship with host receptors that are highly expressed on host cell and neurons, suggesting that microbial metabolites play a key role in visceral hypersensitivity. In this review, we will discuss the techniques used to analysis the metabolome, current potential metabolite targets for visceral hypersensitivity, and discuss the current literature that evaluates the role of the post-inflammatory microbiota and metabolites in visceral hypersensitivity.
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Affiliation(s)
- Adam Shute
- Department of Medicine, Cumming School of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
| | - Dominique G. Bihan
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
| | - Ian A. Lewis
- Department of Biological Sciences, University of Calgary, Calgary, AB, Canada
| | - Yasmin Nasser
- Department of Medicine, Cumming School of Medicine, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB, Canada
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10
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Shi C, Xu S, Huang C, Wang Z, Wang W, Ming D, Yin X, Liu H, Wang F. Pyrroloquinoline Quinone Regulates Enteric Neurochemical Plasticity of Weaned Rats Challenged With Lipopolysaccharide. Front Neurosci 2022; 16:878541. [PMID: 35592257 PMCID: PMC9112857 DOI: 10.3389/fnins.2022.878541] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 03/15/2022] [Indexed: 11/13/2022] Open
Abstract
The enteric nervous system (ENS) is important for the intestinal barrier to defend and regulate inflammation in the intestine. The aim of this study was to investigate the effect of pyrroloquinoline quinone (PQQ) on regulating neuropeptide secretion by ENS neurons of rats challenged with lipopolysaccharide (LPS) to create enteritis. Thirty Sprague Dawley rats were divided into five groups, namely, basal (CTRL), basal plus LPS challenge (LPS), basal with 2.5 mg/kg b.w./day of PQQ plus challenge with LPS (PQQ 2.5), basal with 5.0 mg/kg b.w./day PQQ plus challenge with LPS (PQQ 5), and basal with 10.0 mg/kg b.w./day PQQ plus challenge with LPS (PQQ 10). After treatment with basal diet or PQQ for 14 days, rats were challenged with LPS except for the CTRL group. Rats were euthanized 6 h after the LPS challenge. Rats showed an increased average daily gain in PQQ treatment groups (P < 0.05). Compared with the LPS group, PQQ 5 and PQQ 10 rats showed increased villus height and villus height/crypt depth of jejunum (P < 0.05). In PQQ treatment groups, concentrations of IL-1β and TNF-α in serum and intestine of rats were decreased, and IL-10 concentration was increased in serum compared with the LPS group (P < 0.05). Compared with the LPS group, the concentration of neuropeptide Y (NPY), nerve growth factor (NGF), vasoactive intestinal peptide (VIP), substance P (SP), calcitonin gene-related peptide (CGRP), and brain-derived neurotropic factor (BDNF) in serum were decreased in PQQ treatment groups (P < 0.05). Compared with the LPS group, ileal mRNA levels of BDNF, NPY, and NGF were decreased in PQQ treatment groups (P < 0.05). Jejunal concentrations of SP, CGRP, VIP, BDNF, NPY, and NGF were decreased in PQQ treatment groups compared with the LPS group (P < 0.05). Compared with the LPS group, phosphor-protein kinase B (p-Akt)/Akt levels in jejunum and colon were decreased in PQQ treatment groups (P < 0.05). In conclusion, daily treatment with PQQ improved daily gain, jejunal morphology, immune responses. PQQ-regulated enteric neurochemical plasticity of ENS via the Akt signaling pathway of weaned rats suffering from enteritis.
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Affiliation(s)
- Chenyu Shi
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Song Xu
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Caiyun Huang
- College of Animal Science, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Zijie Wang
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Wenhui Wang
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Dongxu Ming
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Xindi Yin
- Department of Nutrition and Health, China Agricultural University, Beijing, China
| | - Hu Liu
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Fenglai Wang
- State Key Lab of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
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11
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Derkinderen P, Cossais F, de Guilhem de Lataillade A, Leclair-Visonneau L, Neunlist M, Paillusson S, De Giorgio R. Gastrointestinal mucosal biopsies in Parkinson's disease: beyond alpha-synuclein detection. J Neural Transm (Vienna) 2021; 129:1095-1103. [PMID: 34816335 DOI: 10.1007/s00702-021-02445-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Accepted: 11/17/2021] [Indexed: 11/24/2022]
Abstract
Alpha-synuclein deposits, the pathological hallmarks of Parkinson's disease, are consistently found in the gastrointestinal tract of parkinsonian subjects. These observations have raised the potential that endoscopically obtainable mucosal biopsies can aid to a molecular diagnosis of the disease. The possible usefulness of mucosal biopsies is, however, not limited to the detection of alpha-synuclein, but also extends to other essential aspects underlying pathophysiological mechanisms of gastrointestinal manifestations in Parkinson's disease. The aim of the current review is to provide an appraisal of the existing studies showing that gastrointestinal biopsies can be used for the analysis of enteric neuronal and glial cell morphology, intestinal epithelial barrier function, and gastrointestinal inflammation in Parkinson's disease. A perspective on the generation of organoids with GI biopsies and the potential use of single-cell and spatial transcriptomic technologies will be also addressed.
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Affiliation(s)
- Pascal Derkinderen
- Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Inserm U1235 Nantes, Université de Nantes, 1 rue Gaston Veil, 44035, Nantes, France. .,Department of Neurology, CHU Nantes, 44093, Nantes, France.
| | | | - Adrien de Guilhem de Lataillade
- Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Inserm U1235 Nantes, Université de Nantes, 1 rue Gaston Veil, 44035, Nantes, France.,Department of Neurology, CHU Nantes, 44093, Nantes, France
| | - Laurène Leclair-Visonneau
- Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Inserm U1235 Nantes, Université de Nantes, 1 rue Gaston Veil, 44035, Nantes, France.,Department of Physiology, CHU Nantes, 44093, Nantes, France
| | - Michel Neunlist
- Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Inserm U1235 Nantes, Université de Nantes, 1 rue Gaston Veil, 44035, Nantes, France
| | - Sébastien Paillusson
- Inserm, TENS, The Enteric Nervous System in Gut and Brain Diseases, IMAD, Inserm U1235 Nantes, Université de Nantes, 1 rue Gaston Veil, 44035, Nantes, France
| | - Roberto De Giorgio
- Department of Translational Medicine, University of Ferrara, Ferrara, Italy
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12
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Tahir AH, Li JJ, Tang Y. Peripheral and Spinal Mechanisms Involved in Electro-Acupuncture Therapy for Visceral Hypersensitivity. Front Neurosci 2021; 15:696843. [PMID: 34658755 PMCID: PMC8511820 DOI: 10.3389/fnins.2021.696843] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Accepted: 08/27/2021] [Indexed: 12/12/2022] Open
Abstract
One of the important characteristic features of clinically significant gastrointestinal disorders is visceral hypersensitivity (VH). Pain sensitization or VH is a big challenge for clinicians and becomes a very thorny work in clinical practices; the therapeutic efficacy for VH results in limited success. A popular second therapy that is being approved for the induction of analgesia and attenuates VH with fewer side effects includes electro-acupuncture (EA). Different peripheral and spinal neurological chemicals, including neurotransmitters, neuropeptides, and cytokines, and different signaling pathways were associated with EA treatment in VH. Despite the higher acceptance of EA, the underlying mechanism still needs to be further explored. In this paper, we review the available literature to find the peripheral and spinal mechanisms involved in EA to relieve VH.
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Affiliation(s)
- Adnan Hassan Tahir
- School of Acupuncture and Tuina and International Collaborative Centre on Big Science Plan for Purinergic Signalling, Chengdu University of Traditional Chinese Medicine, Chengdu, China.,Acupuncture and Chronobiology Key Laboratory of Sichuan Province, Chengdu, China
| | - Jia-Jia Li
- School of Acupuncture and Tuina and International Collaborative Centre on Big Science Plan for Purinergic Signalling, Chengdu University of Traditional Chinese Medicine, Chengdu, China.,Acupuncture and Chronobiology Key Laboratory of Sichuan Province, Chengdu, China
| | - Yong Tang
- School of Acupuncture and Tuina and International Collaborative Centre on Big Science Plan for Purinergic Signalling, Chengdu University of Traditional Chinese Medicine, Chengdu, China.,Acupuncture and Chronobiology Key Laboratory of Sichuan Province, Chengdu, China
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13
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Noor-Mohammadi E, Ligon CO, Mackenzie K, Stratton J, Shnider S, Greenwood-Van Meerveld B. A Monoclonal Anti-Calcitonin Gene-Related Peptide Antibody Decreases Stress-Induced Colonic Hypersensitivity. J Pharmacol Exp Ther 2021; 379:270-279. [PMID: 34620725 DOI: 10.1124/jpet.121.000731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 09/24/2021] [Indexed: 12/20/2022] Open
Abstract
Irritable bowel syndrome (IBS) is a brain-gut disorder characterized by abdominal pain and altered bowel habits. Although the etiology of IBS remains unclear, stress in adulthood or in early life has been shown to be a significant factor in the development of IBS symptomatology. Evidence suggests that aberrant calcitonin gene-related peptide (CGRP) signaling may be involved in afferent sensitization and visceral organ hypersensitivity. Here, we used a monoclonal anti-CGRP divalent antigen-binding fragment [F(ab')2] antibody to test the hypothesis that inhibition of peripheral CGRP signaling reverses colonic hypersensitivity induced by either chronic adult stress or early life stress. A cohort of adult male rats was exposed to repeated water avoidance stress. Additionally, a second cohort consisting of female rats was exposed to a female-specific neonatal odor-attachment learning paradigm of unpredictable early life stress. Colonic sensitivity was then assessed in adult animals via behavioral responses to colorectal distension (CRD). To analyze spinal nociceptive signaling in response to CRD, dorsal horn extracellular signal-regulated kinase (ERK) 1/2 phosphorylation was measured via immunohistochemistry. Repeated psychologic stress in adulthood or unpredictable stress in early life induced colonic hypersensitivity and enhanced evoked ERK1/2 phosphorylation in the spinal cord after CRD in rats. These phenotypes were reversed by administration of a monoclonal anti-CGRP F(ab')2 fragment antibody. Stress-induced changes in visceral sensitivity and spinal nociceptive signaling were reversed by inhibition of peripheral CGRP signaling, which suggests a prominent role for CGRP in central sensitization and the development of stress-induced visceral hypersensitivity. SIGNIFICANCE STATEMENT: Targeting peripheral calcitonin gene-related peptide (CGRP) with a monoclonal anti-CGRP divalent antigen-binding fragment antibody reduced central sensitization and attenuated colonic hypersensitivity induced by either chronic adult stress or early life stress. CGRP-targeting antibodies are approved for migraine prevention, and the results of this study suggest that targeting CGRP may provide a novel treatment strategy for irritable bowel syndrome-related, stress-induced visceral pain.
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Affiliation(s)
- Ehsan Noor-Mohammadi
- Department of Physiology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma (E.N.-M., C.O.L., B.G.-V.M); and Teva Pharmaceutical Industries, Ltd., Redwood City, California (K.M., J.S., S.S.)
| | - Casey Owen Ligon
- Department of Physiology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma (E.N.-M., C.O.L., B.G.-V.M); and Teva Pharmaceutical Industries, Ltd., Redwood City, California (K.M., J.S., S.S.)
| | - Kimberly Mackenzie
- Department of Physiology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma (E.N.-M., C.O.L., B.G.-V.M); and Teva Pharmaceutical Industries, Ltd., Redwood City, California (K.M., J.S., S.S.)
| | - Jennifer Stratton
- Department of Physiology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma (E.N.-M., C.O.L., B.G.-V.M); and Teva Pharmaceutical Industries, Ltd., Redwood City, California (K.M., J.S., S.S.)
| | - Sara Shnider
- Department of Physiology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma (E.N.-M., C.O.L., B.G.-V.M); and Teva Pharmaceutical Industries, Ltd., Redwood City, California (K.M., J.S., S.S.)
| | - Beverley Greenwood-Van Meerveld
- Department of Physiology, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma (E.N.-M., C.O.L., B.G.-V.M); and Teva Pharmaceutical Industries, Ltd., Redwood City, California (K.M., J.S., S.S.)
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14
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Liu YW, Wang YP, Yen HF, Liu PY, Tzeng WJ, Tsai CF, Lin HC, Lee FY, Jeng OJ, Lu CL, Tsai YC. Lactobacillus plantarum PS128 Ameliorated Visceral Hypersensitivity in Rats Through the Gut-Brain Axis. Probiotics Antimicrob Proteins 2021; 12:980-993. [PMID: 31691208 DOI: 10.1007/s12602-019-09595-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Irritable bowel syndrome (IBS) is a common functional gastrointestinal disorder characterized by abdominal pain and alterations in bowel habits. Current treatments for IBS are unsatisfactory due to its multifactorial pathogenesis involving the microbiota-gut-brain axis. Lactobacillus plantarum PS128 (PS128) was reported to exhibit neuromodulatory activity which may be beneficial for improving IBS. This study aimed to investigate the effect of PS128 on visceral hypersensitivity (VH) and the gut-brain axis using a 5-hydroxytryptophan (5-HTP)-induced VH rat model without colonic inflammation induction, mimicking the characteristics of IBS. Male Sprague-Dawley rats were administered with PS128 (109 CFU in 0.2 mL saline/rat/day) or saline (0.2 mL saline/rat/day) for 14 days. Colorectal distension (CRD) with simultaneous electromyography recording was performed 30 min before and 30 min after the 5-HTP injection. Levels of neuropeptides and neurotrophins were analyzed. PS128 significantly reduced VH induced by the 5-HTP injection and CRD. Neurotransmitter protein levels, substance P, CGRP, BDNF, and NGF, were decreased in the dorsal root ganglion but increased in the spinal cord in response to the 5-HTP injection; PS128 reversed these changes. The hypothalamic-pituitary-adrenal axis was modulated by PS128 with decreased corticosterone concentration in serum and the expression of mineralocorticoid receptors in the amygdala. Oral administration of PS128 inhibited 5-HTP-induced VH during CRD. The ameliorative effect on VH suggests the potential application of PS128 for IBS.
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Affiliation(s)
- Yen-Wenn Liu
- Institute of Biochemistry and Molecular Biology, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan.,Microbiome Research Center, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan
| | - Yen-Po Wang
- Endoscopy Center for Diagnosis and Treatment, Taipei Veterans General Hospital, No. 201, Sec. 2, Shipai Rd., Beitou Dist., Taipei, 11217, Taiwan.,Institute of Brain Science, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan.,School of Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan
| | - Hsu-Fang Yen
- Institute of Biochemistry and Molecular Biology, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan
| | - Pei-Yi Liu
- Institute of Brain Science, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan
| | - Wen-Jian Tzeng
- Institute of Biochemistry and Molecular Biology, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan
| | - Chia-Fen Tsai
- School of Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan.,Department of Psychiatry, Taipei Veterans General Hospital, No. 201, Sec. 2, Shipai Rd., Beitou Dist., Taipei, 11217, Taiwan
| | - Han-Chieh Lin
- School of Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan.,Division of Gastroenterology, Taipei Veterans General Hospital, No. 201, Sec. 2, Shipai Rd., Beitou Dist., Taipei, 11217, Taiwan
| | - Fa-Yauh Lee
- School of Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan.,Division of Gastroenterology, Taipei Veterans General Hospital, No. 201, Sec. 2, Shipai Rd., Beitou Dist., Taipei, 11217, Taiwan
| | | | - Ching-Liang Lu
- Endoscopy Center for Diagnosis and Treatment, Taipei Veterans General Hospital, No. 201, Sec. 2, Shipai Rd., Beitou Dist., Taipei, 11217, Taiwan. .,Institute of Brain Science, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan. .,School of Medicine, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan. .,Division of Gastroenterology, Taipei Veterans General Hospital, No. 201, Sec. 2, Shipai Rd., Beitou Dist., Taipei, 11217, Taiwan.
| | - Ying-Chieh Tsai
- Institute of Biochemistry and Molecular Biology, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan. .,Microbiome Research Center, National Yang-Ming University, No. 155, Sec. 2, Linong St., Beitou Dist., Taipei, 11221, Taiwan.
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15
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Sun H, Ma Y, An S, Wang Z. Altered gene expression signatures by calcitonin gene-related peptide promoted mast cell activity in the colon of stress-induced visceral hyperalgesia mice. Neurogastroenterol Motil 2021; 33:e14073. [PMID: 33382180 DOI: 10.1111/nmo.14073] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 11/19/2020] [Accepted: 12/03/2020] [Indexed: 12/12/2022]
Abstract
BACKGROUND Calcitonin gene-related peptide (CGRP) is possibly involved in recruitment of mucosal mast cells (MCs) in the gut that may be associated with the development of irritable bowel syndrome (IBS), but the role of CGRP on the activation of MCs is still unknown. METHODS Using RNA sequencing (RNA-seq), we examined differentially expressed genes (DEGs) in mouse MCs following CGRP treatment. The expression of key genes in colonic MCs and their relationship with CGRP-containing fibers were examined by immunofluorescence in chronic water-avoidance stress (WAS)-induced visceral hyperalgesia mice. KEY RESULTS A total of 29 DEGs were found significantly changed with 28 upregulated and 1 downregulated following treatment of MCs with CGRP. Bioinformatics analysis showed that key higher DEGs included those associated with response to corticotropin-releasing hormone (CRH), regulation of transcription, MC activation, and proliferation. These processes are enriched for genes associated with stress-induced MC activation in IBS. Western blot verified changes in representative DEGs (Nr4a3, Crem, Gpr35, FosB, Sphlk1) and real-time cell analysis (RTCA) verified the MC proliferation. The vast majority of colonic MCs nearly CGRP-containing fibers in WAS mice overexpressed only Nr4a3 with little to no FosB, Gpr35, Sphlk1, or Crem expression. Nr4a3 knockdown may attenuate the promotion effect of CGRP on MC viability. CONCLUSIONS & INFERENCES Our results suggest that CGRP is a critical regulator of key expressed genes in MC activation. Nr4a3 as a novel regulator of MC function may have an effect on stress-induced visceral hyperalgesia, and this may represent the novel target for drug development.
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Affiliation(s)
- Hanliang Sun
- Department of Human Anatomy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, China
| | - Yanhan Ma
- Department of Human Anatomy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, China
| | - Shuhong An
- Department of Human Anatomy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, China
| | - Zhaojin Wang
- Department of Human Anatomy, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, China
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16
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Qiao LY, Madar J. An objective approach to assess colonic pain in mice using colonometry. PLoS One 2021; 16:e0245410. [PMID: 33711031 PMCID: PMC7954293 DOI: 10.1371/journal.pone.0245410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Accepted: 03/01/2021] [Indexed: 12/24/2022] Open
Abstract
The present study presents a non-surgical approach to assess colonic mechanical sensitivity in mice using colonometry, a technique in which colonic stretch-reflex contractions are measured by recording intracolonic pressures during saline infusion into the distal colon in a constant rate. Colonometrical recording has been used to assess colonic function in healthy individuals and patients with neurological disorders. Here we found that colonometry can also be implemented in mice, with an optimal saline infusion rate of 1.2 mL/h. Colonometrograms showed intermittent pressure rises that was caused by periodical colonic contractions. In the sceneries of colonic hypersensitivity that was generated post 2,4,6-trinitrobenzene sulfonic acid (TNBS)-induced colonic inflammation, following chemogenetic activation of primary afferent neurons, or immediately after noxious stimulation of the colon by colorectal distension (CRD), the amplitude of intracolonic pressure (AICP) was markedly elevated which was accompanied by a faster pressure rising (ΔP/Δt). Colonic hypersensitivity-associated AICP elevation was a result of the enhanced strength of colonic stretch-reflex contraction which reflected the heightened activity of the colonic sensory reflex pathways. The increased value of ΔP/Δt in colonic hypersensitivity indicated a lower threshold of colonic mechanical sensation by which colonic stretch-reflex contraction was elicited by a smaller saline infusion volume during a shorter period of infusion time. Chemogenetic inhibition of primary afferent pathway that was governed by Nav1.8-expressing cells attenuated TNBS-induced up-regulations of AICP, ΔP/Δt, and colonic pain behavior in response to CRD. These findings support that colonometrograms can be used for analysis of colonic pain in mice.
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Affiliation(s)
- Liya Y. Qiao
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA, United States of America
- Department of Internal Medicine, School of Medicine, Virginia Commonwealth University, Richmond, VA, United States of America
- * E-mail:
| | - Jonathan Madar
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA, United States of America
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17
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Qiao LY, Tiwari N. Spinal neuron-glia-immune interaction in cross-organ sensitization. Am J Physiol Gastrointest Liver Physiol 2020; 319:G748-G760. [PMID: 33084399 PMCID: PMC7792669 DOI: 10.1152/ajpgi.00323.2020] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Inflammatory bowel disease (IBD) and irritable bowel syndrome (IBS), historically considered as regional gastrointestinal disorders with heightened colonic sensitivity, are increasingly recognized to have concurrent dysfunction of other visceral and somatic organs, such as urinary bladder hyperactivity, leg pain, and skin hypersensitivity. The interorgan sensory cross talk is, at large, termed "cross-organ sensitization." These organs, anatomically distant from one another, physiologically interlock through projecting their sensory information into dorsal root ganglia (DRG) and then the spinal cord for integrative processing. The fundamental question of how sensitization of colonic afferent neurons conveys nociceptive information to activate primary afferents that innervate distant organs remains ambiguous. In DRG, primary afferent neurons are surrounded by satellite glial cells (SGCs) and macrophage accumulation in response to signals of injury to form a neuron-glia-macrophage triad. Astrocytes and microglia are major resident nonneuronal cells in the spinal cord to interact, physically and chemically, with sensory synapses. Cumulative evidence gathered so far indicate the indispensable roles of paracrine/autocrine interactions among neurons, glial cells, and immune cells in sensory cross-activation. Dichotomizing afferents, sensory convergency in the spinal cord, spinal nerve comingling, and extensive sprouting of central axons of primary afferents each has significant roles in the process of cross-organ sensitization; however, more results are required to explain their functional contributions. DRG that are located outside the blood-brain barrier and reside upstream in the cascade of sensory flow from one organ to the other in cross-organ sensitization could be safer therapeutic targets to produce less central adverse effects.
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Affiliation(s)
- Liya Y. Qiao
- 1Department of Physiology and Biophysics, Commonwealth University School of Medicine, Richmond, Virginia,2Department of Internal Medicine, Commonwealth University School of Medicine, Richmond, Virginia
| | - Namrata Tiwari
- 1Department of Physiology and Biophysics, Commonwealth University School of Medicine, Richmond, Virginia
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18
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Meerschaert KA, Adelman PC, Friedman RL, Albers KM, Koerber HR, Davis BM. Unique Molecular Characteristics of Visceral Afferents Arising from Different Levels of the Neuraxis: Location of Afferent Somata Predicts Function and Stimulus Detection Modalities. J Neurosci 2020; 40:7216-7228. [PMID: 32817244 PMCID: PMC7534907 DOI: 10.1523/jneurosci.1426-20.2020] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/30/2020] [Accepted: 08/07/2020] [Indexed: 02/07/2023] Open
Abstract
Viscera receive innervation from sensory ganglia located adjacent to multiple levels of the brainstem and spinal cord. Here we examined whether molecular profiling could be used to identify functional clusters of colon afferents from thoracolumbar (TL), lumbosacral (LS), and nodose ganglia (NG) in male and female mice. Profiling of TL and LS bladder afferents was also performed. Visceral afferents were back-labeled using retrograde tracers injected into proximal and distal regions of colon or bladder, followed by single-cell qRT-PCR and analysis via an automated hierarchical clustering method. Genes were chosen for assay (32 for bladder; 48 for colon) based on their established role in stimulus detection, regulation of sensitivity/function, or neuroimmune interaction. A total of 132 colon afferents (from NG, TL, and LS ganglia) and 128 bladder afferents (from TL and LS ganglia) were analyzed. Retrograde labeling from the colon showed that NG and TL afferents innervate proximal and distal regions of the colon, whereas 98% of LS afferents only project to distal regions. There were clusters of colon and bladder afferents, defined by mRNA profiling, that localized to either TL or LS ganglia. Mixed TL/LS clustering also was found. In addition, transcriptionally, NG colon afferents were almost completely segregated from colon TL and LS neurons. Furthermore, colon and bladder afferents expressed genes at similar levels, although different gene combinations defined the clusters. These results indicate that genes implicated in both homeostatic regulation and conscious sensations are found at all anatomic levels, suggesting that afferents from different portions of the neuraxis have overlapping functions.SIGNIFICANCE STATEMENT Visceral organs are innervated by sensory neurons whose cell bodies are located in multiple ganglia associated with the brainstem and spinal cord. For the colon, this overlapping innervation is proposed to facilitate visceral sensation and homeostasis, where sensation and pain are mediated by spinal afferents and fear and anxiety (the affective aspects of visceral pain) are the domain of nodose afferents. The transcriptomic analysis performed here reveals that genes implicated in both homeostatic regulation and pain are found in afferents across all ganglia types, suggesting that conscious sensation and homeostatic regulation are the result of convergence, and not segregation, of sensory input.
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Affiliation(s)
- Kimberly A Meerschaert
- Department of Neurobiology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
- Pittsburgh Center for Pain Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
| | | | - Robert L Friedman
- Department of Neurobiology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
- Pittsburgh Center for Pain Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
| | - Kathryn M Albers
- Department of Neurobiology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
- Pittsburgh Center for Pain Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
| | - H Richard Koerber
- Department of Neurobiology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
- Pittsburgh Center for Pain Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
| | - Brian M Davis
- Department of Neurobiology, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
- Pittsburgh Center for Pain Research, University of Pittsburgh, Pittsburgh, Pennsylvania 15261
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19
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Şenkal E, Durankuş F, Çam S, Potas N, Beyazyüz M, Albayrak Y. Increased serum BDNF and ProBDNF levels in children with irritable bowel syndrome. J Psychosom Res 2020; 137:110216. [PMID: 32829103 DOI: 10.1016/j.jpsychores.2020.110216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 07/28/2020] [Accepted: 08/08/2020] [Indexed: 11/21/2022]
Abstract
OBJECTIVE Irritable bowel syndrome (IBS) is one of the most common functional gastrointestinal disorders among the pediatric population. Recently, neurotrophins have been suggested to be etiological factors or causes of symptoms of IBS. In the present study, the aim was to research the serum brain-derived neurotrophic factor (BDNF) and proBDNF levels in children with IBS. METHODS The study group was selected from pediatric gastroenterology outpatient clinic and control group was recruited from healthy children outpatient clinic. Based on the inclusion and exclusion criteria, 29 children with IBS and 55 healthy children were included in the study. The data were obtained from all participants, and if needed, from their parents. All participants were assessed in terms of anthropometric measurements. The serum (BDNF) and proBDNF levels were compared between the groups. RESULTS The proBDNF levels in IBS patients were higher compared with the control group in covariance analysis (IBS patients group mean 492.4, SD 534.1; control group mean 332.8, SD 406.7) (p = 0.02; Cohen's d = 0.45). The serum BDNF levels of IBS patients were also higher compared with the control group (IBS patients group mean 3.1, SD 4.3; control group mean 1.7, SD 2.7) (p = 0.02; Cohen's d = 0.51). CONCLUSIONS The present study is the first to demonstrate that there is a higher level of serum BDNF in children with IBS. Moreover, it is the first to demonstrate an increased level of proBDNF in IBS. Additional research is needed to confirm the preliminary results.
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Affiliation(s)
- Evrim Şenkal
- Istanbul Medeniyet University, Department of Pediatrics, İstanbul,Turkey
| | - Ferit Durankuş
- Istanbul Medeniyet University, Department of Pediatrics, İstanbul,Turkey
| | - Sebahat Çam
- Istanbul Medeniyet University, Department of Pediatrics, İstanbul,Turkey
| | - Nihan Potas
- Ankara Hacıbayram Veli University, Faculty of Economics and Administrative Science, Department of Healthcare Managment, Ankara, Turkey
| | - Murat Beyazyüz
- Tekirdağ Namık Kemal University, Faculty of Medicine, Department of Psychiatry, Department of Behavioural Neuroscience, Tekirdağ, Turkey
| | - Yakup Albayrak
- Tekirdağ Namık Kemal University, Faculty of Medicine, Department of Psychiatry, Department of Behavioural Neuroscience, Tekirdağ, Turkey.
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20
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Shah MK, Ding Y, Wan J, Janyaro H, Tahir AH, Vodyanoy V, Ding MX. Electroacupuncture intervention of visceral hypersensitivity is involved in PAR-2-activation and CGRP-release in the spinal cord. Sci Rep 2020; 10:11188. [PMID: 32636402 PMCID: PMC7341736 DOI: 10.1038/s41598-020-67702-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Accepted: 05/16/2020] [Indexed: 01/02/2023] Open
Abstract
Electroacupuncture (EA) relieves visceral hypersensitivity (VH) with underlying inflammatory bowel diseases. However, the mechanism by which EA treats ileitis-induced VH is not clearly known. To assess the effects of EA on ileitis-induced VH and confirm whether EA attenuates VH through spinal PAR-2 activation and CGRP release, goats received an injection of 2,4,6-trinitro-benzenesulfonic-acid (TNBS) solution into the ileal wall. TNBS-injected goats were allocated into VH, Sham acupuncture (Sham-A) and EA groups, while goats treated with saline instead of TNBS solution were used as the control. Goats in EA group received EA at bilateral Hou-San-Li acupoints for 0.5 h at 7 days and thereafter repeated every 3 days for 6 times. Goats in the Sham-A group were inserted with needles for 0.5 h at the aforementioned acupoints without any hand manipulation and electric stimulation. Visceromotor responses to colorectal distension, an indicator of VH, were recorded by electromyography. The terminal ileum and thoracic spinal cord (T11) were sampled for evaluating ileitis at days 7 and 22, and distribution and expression-levels of PAR-2, CGRP and c-Fos on day 22. TNBS-treated-goats exhibited apparent transmural-ileitis on day 7, microscopically low-grade ileitis on day 22 and VH at days 7–22. Goats of Sham-A, VH or EA group showed higher (P < 0.01) VH at days 7–22 than the Control-goats. EA-treated goats exhibited lower (P < 0.01) VH as compared with Sham-A or VH group. Immunoreactive-cells and expression-levels of spinal PAR-2, CGRP and c-Fos in the EA group were greater (P < 0.01) than those in the Control group, but less (P < 0.01) than those in Sham-A and VH groups on day 22. Downregulation of spinal PAR-2 and CGRP levels by EA attenuates the ileitis and resultant VH.
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Affiliation(s)
- Manoj K Shah
- College of Veterinary Medicine, Huazhong Agricultural University, 1 Shizishan Street, Hongshan District, Wuhan, 430070, Hubei Province, People's Republic of China.,Department of Surgery and Pharmacology, Agriculture and Forestry University, Bharatpur, Nepal
| | - Yi Ding
- College of Veterinary Medicine, Huazhong Agricultural University, 1 Shizishan Street, Hongshan District, Wuhan, 430070, Hubei Province, People's Republic of China
| | - Juan Wan
- College of Veterinary Medicine, Huazhong Agricultural University, 1 Shizishan Street, Hongshan District, Wuhan, 430070, Hubei Province, People's Republic of China
| | - Habibullah Janyaro
- College of Veterinary Medicine, Huazhong Agricultural University, 1 Shizishan Street, Hongshan District, Wuhan, 430070, Hubei Province, People's Republic of China
| | - Adnan Hassan Tahir
- College of Veterinary Medicine, Huazhong Agricultural University, 1 Shizishan Street, Hongshan District, Wuhan, 430070, Hubei Province, People's Republic of China
| | - Vitaly Vodyanoy
- Department of Anatomy, Physiology and Pharmacology, Auburn University, Auburn, AL, USA
| | - Ming-Xing Ding
- College of Veterinary Medicine, Huazhong Agricultural University, 1 Shizishan Street, Hongshan District, Wuhan, 430070, Hubei Province, People's Republic of China.
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21
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Huang T, Okauchi T, Hu D, Shigeta M, Wu Y, Wada Y, Hayashinaka E, Wang S, Kogure Y, Noguchi K, Watanabe Y, Dai Y, Cui Y. Pain matrix shift in the rat brain following persistent colonic inflammation revealed by voxel-based statistical analysis. Mol Pain 2020; 15:1744806919891327. [PMID: 31709891 PMCID: PMC6886279 DOI: 10.1177/1744806919891327] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Inflammatory bowel disease (IBD), mainly comprising Crohn’s disease and ulcerative colitis, is characterized by chronic inflammation in the digestive tract. Approximately 60% of the patients experience abdominal pain during acute IBD episodes, which severely impairs their quality of life. Both peripheral and central mechanisms are thought to be involved in such abdominal pain in IBD. Although much attention has been paid to peripheral mechanisms of abdominal pain in IBD pathophysiology, the involvement of supraspinal mechanisms remains poorly understood. To address this issue, we investigated regional brain activity in response to colorectal distension in normal and IBD model rats using voxel-based statistical analysis of 2-deoxy-2-[18F]fluoro-D-glucose positron emission tomography imaging. The rat IBD model was generated by colorectal administration of 2,4,6-trinitrobenzene sulfonic acid, a chemical compound widely used to generate colitis. Tissue damage and inflammation were induced and dynamically changed with time after 2,4,6-trinitrobenzene sulfonic acid injection, while colorectal distension-induced visceromotor response showed corresponding temporal changes. We found that characteristic brain activations were observed in response to visceral innocuous and noxious colorectal distension and supraspinal nociception shared some physiological sensory pathway. Moreover, widespread brain regions were activated, and the functional coupling between the central medial thalamic nucleus and anterior cingulate cortex was enhanced after noxious colorectal distension in IBD model of rats. Increased brain activity in the anterior insular cortex and anterior cingulate cortex was positively correlated with noxious colorectal distension-induced pain severity in normal and IBD rats, respectively. These findings suggest that the pain matrix was shifted following persistent colonic inflammation, and thalamocortical sensitization in the pathway from the central medial thalamic nucleus to anterior cingulate cortex might be a central mechanism of the visceral hyperalgesia in IBD pathophysiology.
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Affiliation(s)
- Tianliang Huang
- Laboratory for Biofunction Dynamics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan.,Department of Anatomy and Neuroscience, Hyogo College of Medicine, Nishinomiya, Japan.,Department of Pharmacy, School of Pharmacy, Hyogo University of Health Sciences, Kobe, Japan
| | - Takashi Okauchi
- Laboratory for Biofunction Dynamics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Di Hu
- Laboratory for Biofunction Dynamics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Mika Shigeta
- Laboratory for Biofunction Dynamics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Yuping Wu
- Laboratory for Biofunction Dynamics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Yasuhiro Wada
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Emi Hayashinaka
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Shenglan Wang
- Department of Pharmacy, School of Pharmacy, Hyogo University of Health Sciences, Kobe, Japan
| | - Yoko Kogure
- Department of Pharmacy, School of Pharmacy, Hyogo University of Health Sciences, Kobe, Japan
| | - Koichi Noguchi
- Department of Anatomy and Neuroscience, Hyogo College of Medicine, Nishinomiya, Japan
| | - Yasuyoshi Watanabe
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
| | - Yi Dai
- Department of Anatomy and Neuroscience, Hyogo College of Medicine, Nishinomiya, Japan.,Department of Pharmacy, School of Pharmacy, Hyogo University of Health Sciences, Kobe, Japan
| | - Yilong Cui
- Laboratory for Biofunction Dynamics Imaging, RIKEN Center for Biosystems Dynamics Research, Kobe, Japan
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22
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Al Qudah M, Alfaqih M, Al-Shboul O, Saadeh R, Al-Dwairi A. Effect of cytokine treatment on the expression and secretion of brain derived neurotrophic factor in the smooth muscle of the rat colon. Biomed Rep 2020; 13:55-60. [PMID: 32440350 DOI: 10.3892/br.2020.1302] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 04/13/2020] [Indexed: 12/16/2022] Open
Abstract
The production of pro-inflammatory cytokines and chemokines is increased during inflammatory bowel disease (IBD). Previously, it was demonstrated that brain derived neurotrophic factor (BDNF) expression is increased in experimental models of colitis. BDNF is partially responsible for the structural and functional changes that take place during IBD. However, the exact mechanisms underlying the upregulation of BDNF during gut inflammation are unknown. The aim of the present study was to determine the effects of direct treatment of smooth muscle cells with inflammatory cytokines on the synthesis and secretion of BDNF. BDNF expression and secretion levels were measured using ELISA kits on tissue lysates and on incubation media used to culture the rat colon smooth muscle tissues treated for 24 h with either tumor necrosis factor (TNF)-α or interleukin (IL)-1β. Compared with the control tissue samples, treatment with TNF-α and IL-1β resulted in a significant increase in the protein expression levels of BDNF in the incubated smooth muscle tissue. TNF-α and IL-1β also stimulated the secretion of BDNF. Chelation of intracellular Ca2+ with BABTA-AM prevented the TNF-α and IL-1β-induced increase in BDNF protein expression and secretion levels. Furthermore, inhibition of protein kinase A (PKA) significantly reduced BDNF expression levels when treated with cytokines but not secretion. In conclusion, proinflammatory cytokines that are upregulated during IBD, directly stimulated BDNF expression and secretion in a Ca2+ dependent manner. Considering the ability of BDNF to enhance smooth muscle contraction and pain sensation, this autocrine loop may partially explain the characteristic hypercontractility and hypersensitivity associated with IBD.
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Affiliation(s)
- Mohammad Al Qudah
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Mahmoud Alfaqih
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Othman Al-Shboul
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Rami Saadeh
- Departments of Public Health, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Ahmed Al-Dwairi
- Department of Physiology and Biochemistry, School of Medicine, Jordan University of Science and Technology, Irbid 22110, Jordan
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23
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Gastrointestinal disorders-induced pain. GENE REPORTS 2020. [DOI: 10.1016/j.genrep.2019.100580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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24
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Palus K, Całka J. Influence of Acrylamide Administration on the Neurochemical Characteristics of Enteric Nervous System (ENS) Neurons in the Porcine Duodenum. Int J Mol Sci 2019; 21:ijms21010015. [PMID: 31861419 PMCID: PMC6982244 DOI: 10.3390/ijms21010015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 12/13/2019] [Accepted: 12/15/2019] [Indexed: 12/23/2022] Open
Abstract
The digestive tract, especially the small intestine, is one of the main routes of acrylamide absorption and is therefore highly exposed to the toxic effect of acrylamide contained in food. The aim of this experiment was to elucidate the effect of low (tolerable daily intake—TDI) and high (ten times higher than TDI) doses of acrylamide on the neurochemical phenotype of duodenal enteric nervous system (ENS) neurons using the pig as an animal model. The experiment was performed on 15 immature gilts of the Danish Landrace assigned to three experimental groups: control (C) group—pigs administered empty gelatine capsules, low dose (LD) group—pigs administered capsules with acrylamide at the TDI dose (0.5 μg/kg body weight (b.w.)/day), and the high dose (HD) group—pigs administered capsules with acrylamide at a ten times higher dose than the TDI (5 μg/kg b.w./day) with a morning feeding for 4 weeks. Administration of acrylamide, even in a low (TDI) dose, led to an increase in the percentage of enteric neurons immunoreactive to substance P (SP), calcitonin gene-related peptide (CGRP), galanin (GAL), neuronal nitric oxide synthase (nNOS), and vesicular acetylcholine transporter (VACHT) in the porcine duodenum. The severity of the changes clearly depended on the dose of acrylamide and the examined plexus. The obtained results suggest the participation of these neuroactive substances in acrylamide-inducted plasticity and the protection of ENS neurons, which may be an important line of defence from the harmful action of acrylamide.
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25
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Dhama K, Latheef SK, Dadar M, Samad HA, Munjal A, Khandia R, Karthik K, Tiwari R, Yatoo MI, Bhatt P, Chakraborty S, Singh KP, Iqbal HMN, Chaicumpa W, Joshi SK. Biomarkers in Stress Related Diseases/Disorders: Diagnostic, Prognostic, and Therapeutic Values. Front Mol Biosci 2019; 6:91. [PMID: 31750312 PMCID: PMC6843074 DOI: 10.3389/fmolb.2019.00091] [Citation(s) in RCA: 140] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 09/11/2019] [Indexed: 02/05/2023] Open
Abstract
Various internal and external factors negatively affect the homeostatic equilibrium of organisms at the molecular to the whole-body level, inducing the so-called state of stress. Stress affects an organism's welfare status and induces energy-consuming mechanisms to combat the subsequent ill effects; thus, the individual may be immunocompromised, making them vulnerable to pathogens. The information presented here has been extensively reviewed, compiled, and analyzed from authenticated published resources available on Medline, PubMed, PubMed Central, Science Direct, and other scientific databases. Stress levels can be monitored by the quantitative and qualitative measurement of biomarkers. Potential markers of stress include thermal stress markers, such as heat shock proteins (HSPs), innate immune markers, such as Acute Phase Proteins (APPs), oxidative stress markers, and chemical secretions in the saliva and urine. In addition, stress biomarkers also play critical roles in the prognosis of stress-related diseases and disorders, and therapy guidance. Moreover, different components have been identified as potent mediators of cardiovascular, central nervous system, hepatic, and nephrological disorders, which can also be employed to evaluate these conditions precisely, but with stringent validation and specificity. Considerable scientific advances have been made in the detection, quantitation, and application of these biomarkers. The present review describes the current progress of identifying biomarkers, their prognostic, and therapeutic values.
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Affiliation(s)
- Kuldeep Dhama
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Bareilly, India
| | - Shyma K. Latheef
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Bareilly, India
| | - Maryam Dadar
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran
| | - Hari Abdul Samad
- Division of Physiology and Climatology, ICAR-Indian Veterinary Research Institute, Bareilly, India
| | - Ashok Munjal
- Department of Genetics, Barkatullah University, Bhopal, India
| | - Rekha Khandia
- Department of Genetics, Barkatullah University, Bhopal, India
| | - Kumaragurubaran Karthik
- Central University Laboratory, Tamil Nadu Veterinary and Animal Sciences University, Chennai, India
| | - Ruchi Tiwari
- Department of Veterinary Microbiology and Immunology, College of Veterinary Sciences, UP Pandit Deen Dayal Upadhayay Pashu Chikitsa Vigyan Vishwavidyalay Evum Go-Anusandhan Sansthan, Mathura, India
| | - Mohd. Iqbal Yatoo
- Division of Veterinary Clinical Complex, Sher-E-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
| | - Prakash Bhatt
- Teaching Veterinary Clinical Complex, College of Veterinary and Animal Sciences, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, India
| | - Sandip Chakraborty
- Department of Veterinary Microbiology, College of Veterinary Sciences and Animal Husbandry, Agartala, India
| | - Karam Pal Singh
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Bareilly, India
| | - Hafiz M. N. Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, Mexico
| | - Wanpen Chaicumpa
- Department of Parasitology, Faculty of Medicine, Center of Research Excellence on Therapeutic Proteins and Antibody Engineering, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Sunil Kumar Joshi
- Division of Hematology, Oncology and Bone Marrow Transplantation, Department of Microbiology & Immunology, Department of Pediatrics, University of Miami School of Medicine, Miami, FL, United States
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26
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Dhama K, Latheef SK, Dadar M, Samad HA, Munjal A, Khandia R, Karthik K, Tiwari R, Yatoo MI, Bhatt P, Chakraborty S, Singh KP, Iqbal HMN, Chaicumpa W, Joshi SK. Biomarkers in Stress Related Diseases/Disorders: Diagnostic, Prognostic, and Therapeutic Values. Front Mol Biosci 2019. [PMID: 31750312 DOI: 10.3389/fmolb.2019.0009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Various internal and external factors negatively affect the homeostatic equilibrium of organisms at the molecular to the whole-body level, inducing the so-called state of stress. Stress affects an organism's welfare status and induces energy-consuming mechanisms to combat the subsequent ill effects; thus, the individual may be immunocompromised, making them vulnerable to pathogens. The information presented here has been extensively reviewed, compiled, and analyzed from authenticated published resources available on Medline, PubMed, PubMed Central, Science Direct, and other scientific databases. Stress levels can be monitored by the quantitative and qualitative measurement of biomarkers. Potential markers of stress include thermal stress markers, such as heat shock proteins (HSPs), innate immune markers, such as Acute Phase Proteins (APPs), oxidative stress markers, and chemical secretions in the saliva and urine. In addition, stress biomarkers also play critical roles in the prognosis of stress-related diseases and disorders, and therapy guidance. Moreover, different components have been identified as potent mediators of cardiovascular, central nervous system, hepatic, and nephrological disorders, which can also be employed to evaluate these conditions precisely, but with stringent validation and specificity. Considerable scientific advances have been made in the detection, quantitation, and application of these biomarkers. The present review describes the current progress of identifying biomarkers, their prognostic, and therapeutic values.
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Affiliation(s)
- Kuldeep Dhama
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Bareilly, India
| | - Shyma K Latheef
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Bareilly, India
| | - Maryam Dadar
- Razi Vaccine and Serum Research Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran
| | - Hari Abdul Samad
- Division of Physiology and Climatology, ICAR-Indian Veterinary Research Institute, Bareilly, India
| | - Ashok Munjal
- Department of Genetics, Barkatullah University, Bhopal, India
| | - Rekha Khandia
- Department of Genetics, Barkatullah University, Bhopal, India
| | - Kumaragurubaran Karthik
- Central University Laboratory, Tamil Nadu Veterinary and Animal Sciences University, Chennai, India
| | - Ruchi Tiwari
- Department of Veterinary Microbiology and Immunology, College of Veterinary Sciences, UP Pandit Deen Dayal Upadhayay Pashu Chikitsa Vigyan Vishwavidyalay Evum Go-Anusandhan Sansthan, Mathura, India
| | - Mohd Iqbal Yatoo
- Division of Veterinary Clinical Complex, Sher-E-Kashmir University of Agricultural Sciences and Technology of Kashmir, Srinagar, India
| | - Prakash Bhatt
- Teaching Veterinary Clinical Complex, College of Veterinary and Animal Sciences, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, India
| | - Sandip Chakraborty
- Department of Veterinary Microbiology, College of Veterinary Sciences and Animal Husbandry, Agartala, India
| | - Karam Pal Singh
- Division of Pathology, ICAR-Indian Veterinary Research Institute, Bareilly, India
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, Mexico
| | - Wanpen Chaicumpa
- Department of Parasitology, Faculty of Medicine, Center of Research Excellence on Therapeutic Proteins and Antibody Engineering, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Sunil Kumar Joshi
- Division of Hematology, Oncology and Bone Marrow Transplantation, Department of Microbiology & Immunology, Department of Pediatrics, University of Miami School of Medicine, Miami, FL, United States
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27
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Lomax AE, Pradhananga S, Sessenwein JL, O'Malley D. Bacterial modulation of visceral sensation: mediators and mechanisms. Am J Physiol Gastrointest Liver Physiol 2019; 317:G363-G372. [PMID: 31290688 DOI: 10.1152/ajpgi.00052.2019] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The potential role of the intestinal microbiota in modulating visceral pain has received increasing attention during recent years. This has led to the identification of signaling pathways that have been implicated in communication between gut bacteria and peripheral pain pathways. In addition to the well-characterized impact of the microbiota on the immune system, which in turn affects nociceptor excitability, bacteria can modulate visceral afferent pathways by effects on enterocytes, enteroendocrine cells, and the neurons themselves. Proteases produced by bacteria, or by host cells in response to bacteria, can increase or decrease the excitability of nociceptive dorsal root ganglion (DRG) neurons depending on the receptor activated. Short-chain fatty acids generated by colonic bacteria are involved in gut-brain communication, and intracolonic short-chain fatty acids have pronociceptive effects in rodents but may be antinociceptive in humans. Gut bacteria modulate the synthesis and release of enteroendocrine cell mediators, including serotonin and glucagon-like peptide-1, which activate extrinsic afferent neurons. Deciphering the complex interactions between visceral afferent neurons and the gut microbiota may lead to the development of improved probiotic therapies for visceral pain.
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Affiliation(s)
- Alan E Lomax
- Gastrointestinal Diseases Research Unit, Queen's University, Kingston, Ontario, Canada
| | - Sabindra Pradhananga
- Gastrointestinal Diseases Research Unit, Queen's University, Kingston, Ontario, Canada
| | - Jessica L Sessenwein
- Gastrointestinal Diseases Research Unit, Queen's University, Kingston, Ontario, Canada
| | - Dervla O'Malley
- APC Microbiome Ireland, University College Cork, Cork, Ireland.,Department of Physiology, University College Cork, Cork, Ireland
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Marine Toxins and Nociception: Potential Therapeutic Use in the Treatment of Visceral Pain Associated with Gastrointestinal Disorders. Toxins (Basel) 2019; 11:toxins11080449. [PMID: 31370176 PMCID: PMC6723473 DOI: 10.3390/toxins11080449] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 07/24/2019] [Accepted: 07/26/2019] [Indexed: 12/12/2022] Open
Abstract
Visceral pain, of which the pathogenic basis is currently largely unknown, is a hallmark symptom of both functional disorders, such as irritable bowel syndrome, and inflammatory bowel disease. Intrinsic sensory neurons in the enteric nervous system and afferent sensory neurons of the dorsal root ganglia, connecting with the central nervous system, represent the primary neuronal pathways transducing gut visceral pain. Current pharmacological therapies have several limitations, owing to their partial efficacy and the generation of severe adverse effects. Numerous cellular targets of visceral nociception have been recognized, including, among others, channels (i.e., voltage-gated sodium channels, VGSCs, voltage-gated calcium channels, VGCCs, Transient Receptor Potential, TRP, and Acid-sensing ion channels, ASICs) and neurotransmitter pathways (i.e., GABAergic pathways), which represent attractive targets for the discovery of novel drugs. Natural biologically active compounds, such as marine toxins, able to bind with high affinity and selectivity to different visceral pain molecular mediators, may represent a useful tool (1) to improve our knowledge of the physiological and pathological relevance of each nociceptive target, and (2) to discover therapeutically valuable molecules. In this review we report the most recent literature describing the effects of marine toxin on gastrointestinal visceral pain pathways and the possible clinical implications in the treatment of chronic pain associated with gut diseases.
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Screening of potential GCMS derived antimigraine compound from the leaves of Abrus precatorius Linn to target “calcitonin gene related peptide” receptor using in silico analysis. FOOD SCIENCE AND HUMAN WELLNESS 2019. [DOI: 10.1016/j.fshw.2019.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Zhang Y, Qin G, Liu DR, Wang Y, Yao SK. Increased expression of brain-derived neurotrophic factor is correlated with visceral hypersensitivity in patients with diarrhea-predominant irritable bowel syndrome. World J Gastroenterol 2019; 25:269-281. [PMID: 30670915 PMCID: PMC6337018 DOI: 10.3748/wjg.v25.i2.269] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/03/2018] [Accepted: 12/13/2018] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Visceral hypersensitivity is considered to play a vital role in the pathogenesis of irritable bowel syndrome (IBS). Neurotrophins have drawn much attention in IBS recently. Brain-derived neurotrophic factor (BDNF) was found to mediate visceral hypersensitivity via facilitating sensory nerve growth in pre-clinical studies. We hypothesized that BDNF might play a role in the pathogenesis of diarrhea-predominant IBS (IBS-D).
AIM To investigate BDNF levels in IBS-D patients and its role in IBS-D pathophysiology.
METHODS Thirty-one IBS-D patients meeting the Rome IV diagnostic criteria and 20 age- and sex-matched healthy controls were recruited. Clinical and psychological assessments were first conducted using standardized questionnaires. Visceral sensitivity to rectal distension was tested using a high-resolution manometry system. Colonoscopic examination was performed and four mucosal pinch biopsies were taken from the rectosigmoid junction. Mucosal BDNF expression and nerve fiber density were analyzed using immunohistochemistry. Mucosal BDNF mRNA levels were quantified by quantitative real-time polymerase chain reaction. Correlations between these parameters were examined.
RESULTS The patients had a higher anxiety score [median (interquartile range), 6.0 (2.0-10.0) vs 3.0 (1.0-4.0), P = 0.003] and visceral sensitivity index score [54.0 (44.0-61.0) vs 21.0 (17.3-30.0), P < 0.001] than controls. The defecating sensation threshold [60.0 (44.0-80.0) vs 80.0 (61.0-100.0), P = 0.009], maximum tolerable threshold [103.0 (90.0-128.0) vs 182.0 (142.5-209.3), P < 0.001] and rectoanal inhibitory reflex threshold [30.0 (20.0-30.0) vs 30.0 (30.0-47.5), P = 0.032] were significantly lower in IBS-D patients. Intestinal mucosal BDNF protein [3.46E-2 (3.06E-2-4.44E-2) vs 3.07E-2 (2.91E-2-3.48E-2), P = 0.031] and mRNA [1.57 (1.31-2.61) vs 1.09 (0.74-1.42), P = 0.001] expression and nerve fiber density [4.12E-2 (3.07E-2-7.46E-2) vs 1.98E-2 (1.21E-2-4.25E-2), P = 0.002] were significantly elevated in the patients. Increased BDNF expression was positively correlated with abdominal pain and disease severity and negatively correlated with visceral sensitivity parameters.
CONCLUSION Elevated mucosal BDNF may participate in the pathogenesis of IBS-D via facilitating mucosal nerve growth and increasing visceral sensitivity.
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Affiliation(s)
- Yu Zhang
- Graduate School, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
- Department of Gastroenterology, China-Japan Friendship Hospital, Beijing 100029, China
| | - Geng Qin
- Graduate School, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
- Department of Gastroenterology, China-Japan Friendship Hospital, Beijing 100029, China
| | - De-Rong Liu
- Graduate School, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
- Department of Gastroenterology, China-Japan Friendship Hospital, Beijing 100029, China
| | - Yan Wang
- Graduate School, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
- Beijing Key Laboratory for Immune-Mediated Inflammatory Diseases, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, China
| | - Shu-Kun Yao
- Graduate School, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
- Department of Gastroenterology, China-Japan Friendship Hospital, Beijing 100029, China
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Coelho A, Oliveira R, Antunes-Lopes T, Cruz CD. Partners in Crime: NGF and BDNF in Visceral Dysfunction. Curr Neuropharmacol 2019; 17:1021-1038. [PMID: 31204623 PMCID: PMC7052822 DOI: 10.2174/1570159x17666190617095844] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 03/23/2019] [Accepted: 06/03/2019] [Indexed: 12/12/2022] Open
Abstract
Neurotrophins (NTs), particularly Nerve Growth Factor (NGF) and Brain-Derived Neurotrophic Factor (BDNF), have attracted increasing attention in the context of visceral function for some years. Here, we examined the current literature and presented a thorough review of the subject. After initial studies linking of NGF to cystitis, it is now well-established that this neurotrophin (NT) is a key modulator of bladder pathologies, including Bladder Pain Syndrome/Interstitial Cystitis (BPS/IC) and Chronic Prostatitis/Chronic Pelvic Pain Syndrome (CP/CPPS. NGF is upregulated in bladder tissue and its blockade results in major improvements on urodynamic parameters and pain. Further studies expanded showed that NGF is also an intervenient in other visceral dysfunctions such as endometriosis and Irritable Bowel Syndrome (IBS). More recently, BDNF was also shown to play an important role in the same visceral dysfunctions, suggesting that both NTs are determinant factors in visceral pathophysiological mechanisms. Manipulation of NGF and BDNF improves visceral function and reduce pain, suggesting that clinical modulation of these NTs may be important; however, much is still to be investigated before this step is taken. Another active area of research is centered on urinary NGF and BDNF. Several studies show that both NTs can be found in the urine of patients with visceral dysfunction in much higher concentration than in healthy individuals, suggesting that they could be used as potential biomarkers. However, there are still technical difficulties to be overcome, including the lack of a large multicentre placebo-controlled studies to prove the relevance of urinary NTs as clinical biomarkers.
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Affiliation(s)
| | | | | | - Célia Duarte Cruz
- Address correspondence to this author at the Department of Experimental Biology, Experimental Biology Unit, Faculty of Medicine of the University of Porto, Alameda Hernâni Monteiro; Tel: 351 220426740; Fax: +351 225513655; E-mail:
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Fu Y, Lin YM, Winston JH, Radhakrishnan R, Huang LYM, Shi XZ. Role of brain-derived neurotrophic factor in the pathogenesis of distention-associated abdominal pain in bowel obstruction. Neurogastroenterol Motil 2018; 30:e13373. [PMID: 29781158 PMCID: PMC6160336 DOI: 10.1111/nmo.13373] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 04/10/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND Previous studies found that visceral sensitivity is increased in bowel obstruction (BO). We hypothesized that mechanical stress-induced expression of BDNF in smooth muscle cells (SMC) of the distended bowel plays a critical role in visceral hypersensitivity in BO by altering voltage-gated K+ channel (Kv ) activity in sensory neurons. METHODS Partial colon obstruction was maintained in rats for 7 days. Colon-projecting neurons in the dorsal root ganglia (DRG, T13 to L2) were isolated for electrophysiological and gene expression studies. KEY RESULTS Compared to controls, membrane excitability of colon-projecting DRG neurons was markedly enhanced in BO. The densities of total Kv and transient A-type (IA ) K+ currents, but not sustained delayed IK current, were significantly reduced in the neurons in BO. The mRNA expression of IA subtype Kv 1.4 in colon neurons was down-regulated in BO. Expression of BDNF mRNA and protein was dramatically increased in colonic smooth muscle of the distended segment, but not in the non-distended aboral segment. Mechanical stretch of colon SMC in vitro increased BDNF expression. Treatment with anti-BDNF antibody restored total Kv and IA currents of neurons from BO rats. Administration of Trk B inhibitor ANA-12 blocked BO-associated changes of neuronal excitability, Kv activity and gene expression in obstruction. CONCLUSIONS AND INFERENCES Mechanical stress-induced expression of BDNF in colon SMC plays a critical role in visceral hypersensitivity in BO by suppressing A-type K+ currents and gene expression in sensory nerve. These findings help to identify therapeutic targets for distention-associated abdominal pain in the gut.
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Affiliation(s)
- Yu Fu
- Dept. of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
| | - You-Min Lin
- Dept. of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
| | - John H. Winston
- Dept. of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA
| | - Ravi Radhakrishnan
- Dept. of Surgery, University of Texas Medical Branch, Galveston, TX, USA
| | - Li-Yen M. Huang
- Dept. of Neuroscience & Cell Biology, University of Texas Medical Branch, Galveston, TX, USA
| | - Xuan-Zheng Shi
- Dept. of Internal Medicine, University of Texas Medical Branch, Galveston, TX, USA,Address for communication: Dr. Xuan-Zheng Shi, Department of Internal Medicine, Division of Gastroenterology, The University of Texas Medical Branch, 301 University Boulevard, 4.106 Basic Science Building, Galveston, TX 77555-0655, Phone: (409) 772-0940, FAX: (409) 747-3084,
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Liu S. Neurotrophic factors in enteric physiology and pathophysiology. Neurogastroenterol Motil 2018; 30:e13446. [PMID: 30259610 PMCID: PMC6166659 DOI: 10.1111/nmo.13446] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 07/15/2018] [Accepted: 07/16/2018] [Indexed: 12/12/2022]
Abstract
Neurotrophic factors are traditionally recognized for their roles in differentiation, growth, and survival of specific neurons in the central and peripheral nervous system. Some neurotrophic factors are essential for the development and migration of the enteric nervous system along the fetal and post-natal gut. Over the last two decades, several non-developmental functions of neurotrophic factors have been characterized. In the adult gastrointestinal tract, neurotrophic factors regulate gut sensation, motility, epithelial barrier function, and protect enteric neurons and glial cells from damaging insults in the microenvironment of the gut. In this issue of Neurogastroenterology and Motility, Fu et al demonstrate that brain-derived neurotrophic factor plays a role in the pathogenesis of distention-induced abdominal pain in bowel obstruction. In light of this interesting finding, this mini-review highlights some of the recent advances in understanding of the physiological and pathophysiological roles of neurotrophic factors in the adult gut.
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Affiliation(s)
- Sumei Liu
- Department of Biology, College of Science and Health University of Wisconsin‐La Crosse La Crosse Wisconsin
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Spencer NJ, Magnúsdóttir EI, Jakobsson JET, Kestell G, Chen BN, Morris D, Brookes SJ, Lagerström MC. CGRPα within the Trpv1-Cre population contributes to visceral nociception. Am J Physiol Gastrointest Liver Physiol 2018; 314:G188-G200. [PMID: 28971837 DOI: 10.1152/ajpgi.00188.2017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The role of calcitonin gene-related peptide (CGRP) in visceral and somatic nociception is incompletely understood. CGRPα is highly expressed in sensory neurons of dorsal root ganglia and particularly in neurons that also express the transient receptor potential cation channel subfamily V member 1 (Trpv1). Therefore, we investigated changes in visceral and somatic nociception following deletion of CGRPα from the Trpv1-Cre population using the Cre/lox system. In control mice, acetic acid injection (0.6%, ip) caused significant immobility (time stationary), an established indicator of visceral pain. In CGRPα-mCherrylx/lx;Trpv1-Cre mice, the duration of immobility was significantly less than controls, and the distance CGRPα-mCherrylx/lx;Trpv1-Cre mice traveled over 20 min following acetic acid was significantly greater than controls. However, following acetic acid injection, there was no difference between genotypes in the writhing reflex, number of abdominal licks, or forepaw wipes of the cheek. CGRPα-mCherrylx/lx;Trpv1-Cre mice developed more pronounced inflammation-induced heat hypersensitivity above baseline values compared with controls. However, analyses of noxious acute heat or cold transmission revealed no difference between genotypes. Also, odor avoidance test, odor preference test, and buried food test for olfaction revealed no differences between genotypes. Our findings suggest that CGRPα-mediated transmission within the Trpv1-Cre population plays a significant role in visceral nociceptive pathways underlying voluntary movement. Monitoring changes in movement over time is a sensitive parameter to identify differences in visceral nociception, compared with writhing reflexes, abdominal licks, or forepaw wipes of the cheek that were unaffected by deletion of CGRPα- from Trpv1-Cre population and likely utilize different mechanisms. NEW & NOTEWORTHY The neuropeptide calcitonin gene-related peptide (CGRP) is highly colocalized with transient receptor potential cation channel subfamily V member 1 (TRPV1)-expressing primary afferent neurons, but the functional role of CGRPα specifically in these neurons is unknown in pain processing from visceral and somatic afferents. We used cre-lox recombination to conditionally delete CGRPα from TRPV1-expressing neurons in mice. We show that CGRPα from within TRPV1-cre population plays an important role in visceral nociception but less so in somatic nociception.
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Affiliation(s)
- Nick J Spencer
- Discipline of Human Physiology and Centre for Neuroscience, School of Medicine, Flinders University of South Australia , Adelaide , Australia
| | | | | | - Garreth Kestell
- Discipline of Human Physiology and Centre for Neuroscience, School of Medicine, Flinders University of South Australia , Adelaide , Australia
| | - Bao Nan Chen
- Discipline of Human Physiology and Centre for Neuroscience, School of Medicine, Flinders University of South Australia , Adelaide , Australia
| | - David Morris
- Discipline of Human Physiology and Centre for Neuroscience, School of Medicine, Flinders University of South Australia , Adelaide , Australia
| | - Simon J Brookes
- Discipline of Human Physiology and Centre for Neuroscience, School of Medicine, Flinders University of South Australia , Adelaide , Australia
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Jing FC, Zhang J, Feng C, Nian YY, Wang JH, Hu H, Yang BD, Sun XM, Zheng JY, Yin XR. Potential rat model of anxiety-like gastric hypersensitivity induced by sequential stress. World J Gastroenterol 2017; 23:7594-7608. [PMID: 29204059 PMCID: PMC5698252 DOI: 10.3748/wjg.v23.i42.7594] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 10/04/2017] [Accepted: 10/18/2017] [Indexed: 02/06/2023] Open
Abstract
AIM To establish a rat model of anxiety-like gastric hypersensitivity (GHS) of functional dyspepsia (FD) induced by novel sequential stress.
METHODS Animal pups were divided into two groups from postnatal day 2: controls and the sequential-stress-treated. The sequential-stress-treated group received maternal separation and acute gastric irritation early in life and restraint stress in adulthood; controls were reared undisturbed with their mothers. Rats in both groups were followed to adulthood (8 wk) at which point the anxiety-like behaviors and visceromotor responses to gastric distention (20-100 mmHg) and gastric emptying were tested. Meanwhile, alterations in several anxiety-related brain-stomach modulators including 5-hydroxytryptamine (5-HT), γ-aminobutyric acid (GABA), brain-derived neurotrophic factor (BDNF) and nesfatin-1 in the rat hippocampus, plasma and gastric fundus and the 5-HT1A receptor (5-HT1AR) in the hippocampal CA1 subfield and the mucosa of the gastric fundus were examined.
RESULTS Sequential-stress-treated rats simultaneously demonstrated anxiety-like behaviors and GHS in dose-dependent manner compared with the control group. Although rats in both groups consumed similar amount of solid food, the rate of gastric emptying was lower in the sequential-stress-treated rats than in the control group. Sequential stress significantly decreased the levels of 5-HT (51.91 ± 1.88 vs 104.21 ± 2.88, P < 0.01), GABA (2.38 ± 0.16 vs 5.01 ± 0.13, P < 0.01) and BDNF (304.40 ± 10.16 vs 698.17 ± 27.91, P < 0.01) in the hippocampus but increased the content of nesfatin-1 (1961.38 ± 56.89 vs 1007.50 ± 33.05, P < 0.01) in the same site; significantly decreased the levels of 5-HT (47.82 ± 2.29 vs 89.45 ± 2.61, P < 0.01) and BDNF (257.05 ± 12.89 vs 536.71 ± 20.73, P < 0.01) in the plasma but increased the content of nesfatin-1 in it (1391.75 ± 42.77 vs 737.88 ± 33.15, P < 0.01); significantly decreased the levels of 5-HT (41.15 ± 1.81 vs 89.17 ± 2.31, P < 0.01) and BDNF (226.49 ± 12.10 vs 551.36 ± 16.47, P < 0.01) in the gastric fundus but increased the content of nesfatin-1 in the same site (1534.75 ± 38.52 vs 819.63 ± 38.04, P < 0.01). The expressions of 5-HT1AR in the hippocampal CA1 subfield and the mucosa of the gastric fundus were down-regulated measured by IHC (Optical Density value: Hippocampus 15253.50 ± 760.35 vs 21149.75 ± 834.13; gastric fundus 15865.25 ± 521.24 vs 23865.75 ± 1868.60; P < 0.05, respectively) and WB (0.38 ± 0.01 vs 0.57 ± 0.03, P < 0.01) (n = 8 in each group).
CONCLUSION Sequential stress could induce a potential rat model of anxiety-like GHS of FD, which could be used to research the mechanisms of this intractable disease.
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Affiliation(s)
- Fu-Chun Jing
- Department of Gastroenterology, Second Hospital Affiliated to the Medical School of Xi’an Jiao Tong University, Xi’an 710004, Shaanxi Province, China
- Department of Digestive Diseases, Baoji People’s Hospital Affiliated to the Medical School of Yan’an University, Baoji 721000, Shaanxi Province, China
| | - Jun Zhang
- Department of Gastroenterology, Second Hospital Affiliated to the Medical School of Xi’an Jiao Tong University, Xi’an 710004, Shaanxi Province, China
| | - Chen Feng
- Department of Gastroenterology, Second Hospital Affiliated to the Medical School of Xi’an Jiao Tong University, Xi’an 710004, Shaanxi Province, China
| | - Yuan-Yuan Nian
- Department of Gastroenterology, Second Hospital Affiliated to the Medical School of Xi’an Jiao Tong University, Xi’an 710004, Shaanxi Province, China
| | - Jin-Hai Wang
- Department of Gastroenterology, Second Hospital Affiliated to the Medical School of Xi’an Jiao Tong University, Xi’an 710004, Shaanxi Province, China
| | - Hao Hu
- Department of Pharmacology, Health Science Center, Xi’an Jiao Tong University, Xi’an 710061, Shaanxi Province, China
- Basic Medical Experiment Teaching Center, Health Science Center, Xi’an Jiao Tong University, Xi’an 710061, Shaanxi Province, China
| | - Bao-De Yang
- Department of Pharmacology, Health Science Center, Xi’an Jiao Tong University, Xi’an 710061, Shaanxi Province, China
- Basic Medical Experiment Teaching Center, Health Science Center, Xi’an Jiao Tong University, Xi’an 710061, Shaanxi Province, China
| | - Xiao-Ming Sun
- Department of Pharmacology, Health Science Center, Xi’an Jiao Tong University, Xi’an 710061, Shaanxi Province, China
- Basic Medical Experiment Teaching Center, Health Science Center, Xi’an Jiao Tong University, Xi’an 710061, Shaanxi Province, China
| | - Jian-Yun Zheng
- Department of Pathology, the First Affiliated Hospital of Xi’an Medical University, Xi’an 710077, Shaanxi Province, China
| | - Xiao-Ran Yin
- Department of Gastroenterology, Second Hospital Affiliated to the Medical School of Xi’an Jiao Tong University, Xi’an 710004, Shaanxi Province, China
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Genome-wide association analysis of pain severity in dysmenorrhea identifies association at chromosome 1p13.2, near the nerve growth factor locus. Pain 2017; 157:2571-2581. [PMID: 27454463 PMCID: PMC5436737 DOI: 10.1097/j.pain.0000000000000678] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Supplemental Digital Content is Available in the Text. Genome-wide association study on 11,891 females of European descent for self-reported dysmenorrhea pain severity identified a significant association that colocalises with the NGF locus. Dysmenorrhea is a common chronic pelvic pain syndrome affecting women of childbearing potential. Family studies suggest that genetic background influences the severity of dysmenorrhea, but genetic predisposition and molecular mechanisms underlying dysmenorrhea are not understood. In this study, we conduct the first genome-wide association study to identify genetic factors associated with dysmenorrhea pain severity. A cohort of females of European descent (n = 11,891) aged 18 to 45 years rated their average dysmenorrhea pain severity. We used a linear regression model adjusting for age and body mass index, identifying one genome-wide significant (P < 5 × 10−8) association (rs7523086, P = 4.1 × 10−14, effect size 0.1 [95% confidence interval, 0.074–0.126]). This single nucleotide polymorphism is colocalising with NGF, encoding nerve growth factor. The presence of one risk allele corresponds to a predicted 0.1-point increase in pain intensity on a 4-point ordinal pain scale. The putative effects on NGF function and/or expression remain unknown. However, genetic variation colocalises with active epigenetic marks in fat and ovary tissues, and expression levels in aorta tissue of a noncoding RNA flanking NGF correlate. Participants reporting extreme dysmenorrhea pain were more likely to report being positive for endometriosis, polycystic ovarian syndrome, depression, and other psychiatric disorders. Our results indicate that dysmenorrhea pain severity is partly genetically determined. NGF already has an established role in chronic pain disorders, and our findings suggest that NGF may be an important mediator for gynaecological/pelvic pain in the viscera.
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Darbaky Y, Evrard B, Patrier S, Falenta J, Garcin S, Tridon A, Dapoigny M, Silberberg C, Nivoliez A, Diop L. Oral probiotic treatment of Lactobacillus rhamnosus Lcr35 ® prevents visceral hypersensitivity to a colonic inflammation and an acute psychological stress. J Appl Microbiol 2016; 122:188-200. [PMID: 27718511 DOI: 10.1111/jam.13320] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Revised: 09/05/2016] [Accepted: 10/05/2016] [Indexed: 12/16/2022]
Abstract
AIMS This study evaluated the efficacy of a repeated oral treatment with two active pharmaceutical ingredients (Lcr Lenio® and Lcr Restituo® ) derivated from the probiotic bacterial strain Lactobacillus rhamnosus Lcr35® in two animal models mimicking different features of irritable bowel syndrome (IBS). IBS is characterized by visceral pain associated with alteration of bowel transit. IBS patients present visceral hypersensitivity with peripheral and central origins. METHODS AND RESULTS The injection of 2,4,6-trinitrobenzenesulfonic acid (TNBS) into the proximal colon as well as an acute partial restraint stress (PRS) produces colonic hypersensitivity measured in conscious rats by a decrease in pain threshold in response to distal colonic distension. Visceral hypersensitivity was produced by injection of TNBS 7 days before colonic distension or by acute PRS on testing day. Treatments were performed once a day during eight consecutive days. CONCLUSIONS This study indicates that an 8-day probiotic treatment (Lcr Lenio and Lcr Restituo) produces an antihypersensitivity activity in both TNBS and PRS visceral pain models. As this probiotic strain attenuates peripherally and centrally induced visceral hypersensitivity in rats, it may be active in treatment of IBS symptoms. An immunomodulatory effect of the probiotics was highlighted in the TNBS model on the IL-23 secretion, suggesting a mechanism of action involving a regulation of the local IL-23/Th17 immune activation. SIGNIFICANCE AND IMPACT OF THE STUDY Two formulas of Lcr35® probiotic strain show very encouraging results for the treatment of IBS patients. Further studies are needed to better understand the role and mechanisms of probiotics on the pathogenesis of IBS.
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Affiliation(s)
| | - B Evrard
- Laboratoire d'Immunologie, Université d'Auvergne-Clermont 1, Clermont-Ferrand, France
| | - S Patrier
- Département Recherche et Développement-Biose®, Arpajon-sur-Cère, France
| | - J Falenta
- Laboratoire d'Immunologie, Université d'Auvergne-Clermont 1, Clermont-Ferrand, France
| | - S Garcin
- Laboratoire d'Immunologie, Université d'Auvergne-Clermont 1, Clermont-Ferrand, France
| | - A Tridon
- Laboratoire d'Immunologie, Université d'Auvergne-Clermont 1, Clermont-Ferrand, France
| | - M Dapoigny
- Médecine Digestive, Centre Hospitalier Universitaire (CHU) Estaing, CHU Clermont Université, Clermont-Ferrand, France
| | | | - A Nivoliez
- Département Recherche et Développement-Biose®, Arpajon-sur-Cère, France
| | - L Diop
- ANS Biotech, Riom, France
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Hashmi F, Liu M, Shen S, Qiao LY. EXPRESS: Phospholipase C gamma mediates endogenous brain-derived neurotrophic factor - regulated calcitonin gene-related peptide expression in colitis - induced visceral pain. Mol Pain 2016; 12:12/0/1744806916657088. [PMID: 27306412 PMCID: PMC4955977 DOI: 10.1177/1744806916657088] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Visceral hypersensitivity is a complex pathophysiological paradigm with unclear mechanisms. Primary afferent neuronal plasticity marked by alterations in neuroactive compounds such as calcitonin gene-related peptide is suggested to underlie the heightened sensory responses. Signal transduction that leads to calcitonin gene-related peptide expression thereby sensory neuroplasticity during colitis remains to be elucidated. RESULTS In a rat model with colitis induced by 2,4,6-trinitrobenzene sulfonic acid, we found that endogenously elevated brain-derived neurotrophic factor elicited an up-regulation of calcitonin gene-related peptide in the lumbar L1 dorsal root ganglia. At seven days of colitis, neutralization of brain-derived neurotrophic factor with a specific brain-derived neurotrophic factor antibody reversed calcitonin gene-related peptide up-regulation in the dorsal root ganglia. Colitis-induced calcitonin gene-related peptide transcription was also inhibited by brain-derived neurotrophic factor antibody treatment. Signal transduction studies with dorsal root ganglia explants showed that brain-derived neurotrophic factor-induced calcitonin generelated peptide expression was mediated by the phospholipase C gamma, but not the phosphatidylinositol 3-kinase/Akt or the mitogen-activated protein kinase/extracellular signal-regulated protein kinase pathway. Application of PLC inhibitor U73122 in vivo confirmed that colitis-induced and brain-derived neurotrophic factor-mediated calcitonin gene-related peptide up-regulation in the dorsal root ganglia was regulated by the phospholipase C gamma pathway. In contrast, suppression of the phosphatidylinositol 3-kinase activity in vivo had no effect on colitis-induced calcitonin gene-related peptide expression. During colitis, calcitonin gene-related peptide also co-expressed with phospholipase C gamma but not with p-Akt. Calcitonin gene-related peptide up-regulation during colitis correlated to the activation of cAMP-responsive element binding protein in the same neurons. Consistently, colitis-induced cAMP-responsive element binding protein activation in the dorsal root ganglia was attenuated by brain-derived neurotrophic factor antibody treatment. CONCLUSION These results suggest that colitis-induced and brain-derived neurotrophic factor-mediated calcitonin generelated peptide expression in sensory activation is regulated by a unique pathway involving brain-derived neurotrophic factorphospholipase C gamma-cAMP-responsive element binding protein axis.
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Affiliation(s)
- Fiza Hashmi
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Miao Liu
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Shanwei Shen
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, Virginia, USA
| | - Li-Ya Qiao
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, Virginia, USA
- Department of Internal Medicine, School of Medicine, Virginia Commonwealth University, Richmond, Virginia, USA
- Li-Ya Qiao, Department of Physiology and Biophysics, PO Box 980551, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298–0551, USA.
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Wu B, Xu C, Huang HH. [Expression profiles of brain-derived neurotrophic factor in the spinal dorsal horn of young rats with visceral hypersensitivity]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2016; 18:277-281. [PMID: 26975829 PMCID: PMC7390003 DOI: 10.7499/j.issn.1008-8830.2016.03.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 01/26/2016] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To explore the relationship between the expression of brain-derived neurotrophic factor (BDNF) in the spinal dorsal horn and the increase in visceral hypersensitivity in young rats by establishing a young rat model of visceral hypersensitivity by neonatal maternal separation (NMS). METHODS Thirty-two newborn Sprague-Dawley rats were randomly and equally divided into four groups by a 2×2 factorial design: control, NMS, colorectal distension (CRD), and NMS+CRD. The newborn rats in the NMS and NMS+CRD groups were subjected to 3-hour daily maternal separation from days 2 to 14 after birth to establish a model of visceral hypersensitivity, while the rats in the control and CRD groups received no treatment after birth. At 6 weeks after birth, the CRD and CRD+NMS groups received CRD stimulation. The streptavidin-biotin complex immunohistochemical method was used to determine the expression of BDNF in the spinal dorsal horn. The immunohistochemical score (IHS) was calculated based on the percentage of BDNF-positive cells and color intensity. The percentage of BDNF-positive cells in the spinal dorsal horn and IHS were analyzed by factorial analysis of variance. RESULTS The expression of BDNF was detected bilaterally in the spinal dorsal horn at different levels in the four groups. The percentage of BDNF-positive cells and IHS were significantly higher in the NMS and NMS+CRD groups than in the control group (P<0.05). The results of factorial analysis of variance indicated that NMS significantly increased the percentage of BDNF-positive cells in the spinal dorsal horn and IHS; a single CRD stimulation had no effects on the IHS of BDNF-positive cells in the spinal dorsal horn; there was no interaction between NMS and a single CRD stimulation. CONCLUSIONS The over-expression of BDNF in the spinal dorsal horn may be involved in high visceral hypersensitivity in young rats induce by NMS.
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Affiliation(s)
- Bin Wu
- Department of Pediatrics, First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China.
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Wu B, Xu C, Huang HH. [Expression profiles of brain-derived neurotrophic factor in the spinal dorsal horn of young rats with visceral hypersensitivity]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2016; 18:277-81. [PMID: 26975829 PMCID: PMC7390003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 01/26/2016] [Indexed: 08/01/2024]
Abstract
OBJECTIVE To explore the relationship between the expression of brain-derived neurotrophic factor (BDNF) in the spinal dorsal horn and the increase in visceral hypersensitivity in young rats by establishing a young rat model of visceral hypersensitivity by neonatal maternal separation (NMS). METHODS Thirty-two newborn Sprague-Dawley rats were randomly and equally divided into four groups by a 2×2 factorial design: control, NMS, colorectal distension (CRD), and NMS+CRD. The newborn rats in the NMS and NMS+CRD groups were subjected to 3-hour daily maternal separation from days 2 to 14 after birth to establish a model of visceral hypersensitivity, while the rats in the control and CRD groups received no treatment after birth. At 6 weeks after birth, the CRD and CRD+NMS groups received CRD stimulation. The streptavidin-biotin complex immunohistochemical method was used to determine the expression of BDNF in the spinal dorsal horn. The immunohistochemical score (IHS) was calculated based on the percentage of BDNF-positive cells and color intensity. The percentage of BDNF-positive cells in the spinal dorsal horn and IHS were analyzed by factorial analysis of variance. RESULTS The expression of BDNF was detected bilaterally in the spinal dorsal horn at different levels in the four groups. The percentage of BDNF-positive cells and IHS were significantly higher in the NMS and NMS+CRD groups than in the control group (P<0.05). The results of factorial analysis of variance indicated that NMS significantly increased the percentage of BDNF-positive cells in the spinal dorsal horn and IHS; a single CRD stimulation had no effects on the IHS of BDNF-positive cells in the spinal dorsal horn; there was no interaction between NMS and a single CRD stimulation. CONCLUSIONS The over-expression of BDNF in the spinal dorsal horn may be involved in high visceral hypersensitivity in young rats induce by NMS.
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Affiliation(s)
- Bin Wu
- Department of Pediatrics, First Affiliated Hospital of Fujian Medical University, Fuzhou 350005, China.
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BDNF contributes to IBS-like colonic hypersensitivity via activating the enteroglia-nerve unit. Sci Rep 2016; 6:20320. [PMID: 26837784 PMCID: PMC4738267 DOI: 10.1038/srep20320] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 12/30/2015] [Indexed: 02/08/2023] Open
Abstract
The over-expressed colonic brain-derived neurotrophic factor (BDNF) has been reported to be associated with abdominal pain in patients with irritable bowel syndrome (IBS). However, the neuropathological mechanism is unclear. We here investigated the involvement of enteroglial cells (EGCs) and enteric nerves in IBS-like visceral hypersensitivity. We showed that glial fibrillary acidic protein (GFAP), tyrosine receptor kinase B (TrkB) and substance P (SP) were significantly increased in the colonic mucosa of IBS patients. The upregulation of those proteins was also observed in the colon of mice with visceral hypersensitivity, but not in the colon of BDNF(+/-) mice. Functionally, TrkB or EGC inhibitors, or BDNF knockdown significantly suppressed visceral hypersensitivity in mice. Using the EGC cell line, we found that recombinant human BDNF (r-HuBDNF) could directly activate EGCs via the TrkB-phospholipase Cγ1 pathway, thereby inducing a significant upregulation of SP. Moreover, supernatants from r-HuBDNF-activated EGC culture medium, rather than r-HuBDNF alone, triggered markedly augmented discharges in isolated intestinal mesenteric afferent nerves. r-HuBDNF alone could cause mesenteric afferent mechanical hypersensitivity independently, and this effect was synergistically enhanced by activated EGCs. We conclude that EGC-enteric nerve unit may be involved in IBS-like visceral hypersensitivity, and this process is likely initiated by BDNF-TrkB pathway activation.
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Xu XJ, Liu L, Yao SK. Nerve growth factor and diarrhea-predominant irritable bowel syndrome (IBS-D): a potential therapeutic target? J Zhejiang Univ Sci B 2016; 17:1-9. [PMID: 26739521 PMCID: PMC4710835 DOI: 10.1631/jzus.b1500181] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Accepted: 11/07/2015] [Indexed: 02/05/2023]
Abstract
Irritable bowel syndrome (IBS) is a common functional gastrointestinal disorder characterized by recurrent abdominal pain or discomfort associated with abnormal bowel habits. Diarrhea-predominant IBS (IBS-D) is a major subtype of IBS, the predominant manifestations of which are abdominal pain and diarrhea. The pathogenesis of IBS-D remained unknown until recently. The effects of psychosocial stress, central hypervigilance, neuroendocrine abnormality, disturbed gastrointestinal motility, mucosal immune activation, intestinal barrier dysfunction, visceral hypersensitivity (VH), altered gut flora, and genetic susceptibility may be involved in its development. Recently, increased attention has been placed on the neural-immune-endocrine network mechanism in IBS-D, especially the role of various neuroendocrine mediators. As a member of the neurotrophin family, nerve growth factor (NGF) has diverse biological effects, and participates in the pathogenesis of many diseases. Basic studies have demonstrated that NGF is associated with inflammatory- and stress-related VH, as well as stress-related intestinal barrier dysfunction. The aim of this study is to summarize recent literature and discuss the role of NGF in the pathophysiology of IBS-D, especially in VH and intestinal barrier dysfunction, as well as its potential as a therapeutic target in IBS-D.
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Affiliation(s)
- Xiao-juan Xu
- Gastroenterology Department, China-Japan Friendship Hospital, Beijing 100029, China
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100073, China
| | - Liang Liu
- Jinan Central Hospital Affiliated to Shandong University, Jinan 250014, China
| | - Shu-kun Yao
- Gastroenterology Department, China-Japan Friendship Hospital, Beijing 100029, China
- Graduate School of Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100073, China
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Xia C, Shen S, Hashmi F, Qiao LY. Colitis-induced bladder afferent neuronal activation is regulated by BDNF through PLCγ pathway. Exp Neurol 2015; 285:126-135. [PMID: 26687970 DOI: 10.1016/j.expneurol.2015.12.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Revised: 11/14/2015] [Accepted: 12/10/2015] [Indexed: 02/08/2023]
Abstract
Patients with inflammatory bowel disease (IBD) or irritable bowel syndrome (IBS) often experience increased sensory responsiveness in the urinary bladder reflecting neurogenic bladder overactivity. Here we demonstrate that colitis-induced up-regulation of the phospholipase C gamma (PLCγ) pathway downstream of brain-derived neurotrophic factor (BDNF) in bladder afferent neurons in the dorsal root ganglia (DRG) plays essential roles in activating these neurons thereby leading to bladder hyperactivity. Upon induction of colitis with 2,4,6-trinitrobenzenesulfonic acid (TNBS) in rats, we found that the phosphorylation (activation) level of cAMP responsive element-binding (p-CREB) protein, a molecular switch of neuronal plasticity, was increased in specifically labeled bladder afferent neurons in the thoracolumbar and lumbosacral DRGs. In rats having reduced levels of BDNF (BDNF+/-), colitis failed to elevate CREB protein activity in bladder afferent neurons. Physiological examination also demonstrated that colitis-induced urinary frequency was not shown in BDNF+/- rats, implicating an essential role of BDNF in mediating colon-to-bladder sensory cross-sensitization. We further implemented in vivo and in vitro studies and demonstrated that BDNF-mediated colon-to-bladder sensory cross-activation involved the TrkB-PLCγ-calcium/calmodulin-dependent protein kinase II (CaMKII) cascade. In contrast, the PI3K/Akt pathway was not activated in bladder afferent neurons during colitis and was not involved in BDNF action in the DRG. Our results suggest that colon-to-bladder sensory cross-sensitization is regulated by specific signal transduction initiated by the up-regulation of BDNF in the DRG.
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Affiliation(s)
- Chunmei Xia
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA, USA
| | - Shanwei Shen
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA, USA
| | - Fiza Hashmi
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA, USA
| | - Li-Ya Qiao
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA, USA.
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Liu M, Kay JC, Shen S, Qiao LY. Endogenous BDNF augments NMDA receptor phosphorylation in the spinal cord via PLCγ, PKC, and PI3K/Akt pathways during colitis. J Neuroinflammation 2015; 12:151. [PMID: 26289587 PMCID: PMC4545933 DOI: 10.1186/s12974-015-0371-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 08/06/2015] [Indexed: 12/18/2022] Open
Abstract
Background Spinal central sensitization is an important process in the generation and maintenance of visceral hypersensitivity. The release of brain-derived neurotrophic factor (BDNF) from the primary afferent neurons to the spinal cord contributes to spinal neuronal plasticity and increases neuronal activity and synaptic efficacy. The N-Methyl-D-aspartic acid (NMDA) receptor possesses ion channel properties, and its activity is modulated by phosphorylation of its subunits including the NMDA receptor 1 (NR1). Methods Colonic inflammation was induced by a single dose of intracolonic instillation of tri-nitrobenzene sulfonic acid (TNBS). NR1 phosphorylation by BDNF in vivo and in culture was examined by western blot and immunohistochemistry. Signal transduction was studied by direct examination and use of specific inhibitors. Results During colitis, the level of NR1 phospho-Ser896 was increased in the dorsal horn region of the L1 and S1 spinal cord; this increase was attenuated by injection of BDNF neutralizing antibody to colitic animals (36 μg/kg, intravenous (i.v.)) and was also reduced in BDNF+/− rat treated with TNBS. Signal transduction examination showed that the extracellular signal-regulated kinase (ERK) activation was not involved in BDNF-induced NR1 phosphorylation. In contrast, the phosphatidylinositol 3-kinase (PI3K)/Akt pathway mediated BDNF-induced NR1 phosphorylation in vivo and in culture; this is an additional pathway to the phospholipase C-gamma (PLCγ) and the protein kinase C (PKC) that was widely considered to phosphorylate NR1 at Ser896. In spinal cord culture, the inhibitors to PLC (U73122), PKC (bisindolylmaleimide I), and PI3K (LY294002), but not MEK (PD98059) blocked BDNF-induced NR1 phosphorylation. In animals with colitis, treatment with LY294002 (50 μg/kg, i.v.) blocked the Akt activity as well as NR1 phosphorylation at Ser896 in the spinal cord. Conclusion BDNF participates in colitis-induced spinal central sensitization by up-regulating NR1 phosphorylation at Ser896. The PI3K/Akt pathway, in addition to PLCγ and PKC, mediates BDNF action in the spinal cord during colitis. Electronic supplementary material The online version of this article (doi:10.1186/s12974-015-0371-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Miao Liu
- Department of Physiology and Biophysics, Internal Medicine Gastroenterology, Virginia Commonwealth University School of Medicine, 1220 East Broad Street MMRB 5046, Richmond, VA, 23298-0551, USA.
| | - Jarren C Kay
- Department of Physiology and Biophysics, Internal Medicine Gastroenterology, Virginia Commonwealth University School of Medicine, 1220 East Broad Street MMRB 5046, Richmond, VA, 23298-0551, USA.
| | - Shanwei Shen
- Department of Physiology and Biophysics, Internal Medicine Gastroenterology, Virginia Commonwealth University School of Medicine, 1220 East Broad Street MMRB 5046, Richmond, VA, 23298-0551, USA.
| | - Li-Ya Qiao
- Department of Physiology and Biophysics, Internal Medicine Gastroenterology, Virginia Commonwealth University School of Medicine, 1220 East Broad Street MMRB 5046, Richmond, VA, 23298-0551, USA.
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TAHARA TOMOMITSU, SHIBATA TOMOYUKI, OKUBO MASAAKI, ISHIZUKA TAKAMITSU, KAWAMURA TOMOHIKO, YAMASHITA HIROMI, NAKAMURA MASAKATSU, NAKAGAWA YOSHIHITO, NAGASAKA MITSUO, ARISAWA TOMIYASU, OHMIYA NAOKI, HIRATA ICHIRO. Association between interleukin-1β and tumor necrosis factor-α polymorphisms and symptoms of dyspepsia. Mol Med Rep 2015; 11:3888-93. [PMID: 25571868 DOI: 10.3892/mmr.2015.3163] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Accepted: 11/21/2014] [Indexed: 11/06/2022] Open
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Mingin GC, Peterson A, Erickson CS, Nelson MT, Vizzard MA. Social stress induces changes in urinary bladder function, bladder NGF content, and generalized bladder inflammation in mice. Am J Physiol Regul Integr Comp Physiol 2014; 307:R893-900. [PMID: 25100077 DOI: 10.1152/ajpregu.00500.2013] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Social stress may play a role in urinary bladder dysfunction in humans, but the underlying mechanisms are unknown. In the present study, we explored changes in bladder function caused by social stress using mouse models of stress and increasing stress. In the stress paradigm, individual submissive FVB mice were exposed to C57BL/6 aggressor mice directly/indirectly for 1 h/day for 2 or 4 wk. Increased stress was induced by continuous, direct/indirect exposure of FVB mice to aggressor mice for 2 wk. Stressed FVB mice exhibited nonvoiding bladder contractions and a decrease in both micturition interval (increased voiding frequency) and bladder capacity compared with control animals. ELISAs demonstrated a significant increase in histamine protein expression with no change in nerve growth factor protein expression in the urinary bladder compared with controls. Unlike stressed mice, mice exposed to an increased stress paradigm exhibited increased bladder capacities and intermicturition intervals (decreased voiding frequency). Both histamine and nerve growth factor protein expression were significantly increased with increased stress compared with control bladders. The change in bladder function from increased voiding frequency to decreased voiding frequency with increased stress intensity suggests that changes in social stress-induced urinary bladder dysfunction are context and duration dependent. In addition, changes in the bladder inflammatory milieu with social stress may be important contributors to changes in urinary bladder function.
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Affiliation(s)
- Gerald C Mingin
- Department of Surgery (Urology), University of Vermont College of Medicine, Burlington, Vermont; Vermont Children's Hospital, Burlington, Vermont
| | - Abbey Peterson
- Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, Vermont; and
| | - Cuixia Shi Erickson
- Department of Surgery (Urology), University of Vermont College of Medicine, Burlington, Vermont
| | - Mark T Nelson
- Department of Pharmacology, University of Vermont College of Medicine, Burlington, Vermont
| | - Margaret A Vizzard
- Department of Neurological Sciences, University of Vermont College of Medicine, Burlington, Vermont; and
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Hosoya T, Matsumoto K, Tashima K, Nakamura H, Fujino H, Murayama T, Horie S. TRPM8 has a key role in experimental colitis-induced visceral hyperalgesia in mice. Neurogastroenterol Motil 2014; 26:1112-21. [PMID: 24832648 DOI: 10.1111/nmo.12368] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 04/22/2014] [Indexed: 01/11/2023]
Abstract
BACKGROUND Transient receptor potential channel melastatin 8 (TRPM8) is activated by cold temperatures and cooling agents (menthol and icilin). Recent studies showed TRPM8 is expressed in visceral organs and peripheral sensory pathways. However, the role of TRPM8 in visceral hyperalgesia is poorly understood in pathological states such as inflammatory bowel disease. Hence, we investigated the distribution of TRPM8 and its involvement in visceral hyperalgesia in experimental colitis mice. METHODS TRPM8 immunoreactivity was detected using immunohistochemical staining with fluorescein-conjugated tyramide amplification. Visceral hyperalgesia was measured by the intracolonic administration of TRPM8 agonist, WS-12, in control and dextran sodium sulfate (DSS)-induced colitis mice. KEY RESULTS TRPM8 immunoreactivity in the distal colon was much higher than in the transverse and proximal colon under physiological conditions. TRPM8 immunoreactivity markedly increased in the distal colon mucosa of DSS-induced colitis mice compared with control mice. The number of TRPM8 nerve fibers in mucosa of DSS- or 2,4,6-trinitrobenzene sulfonic acid-induced colitis model mice drastically increased compared with control mice. TRPM8 immunoreactivities colocalized with the calcitonin gene-related peptide- and substance P-immunoreactive nerve fibers in the mucosa. Intracolonic administration of WS-12 induced behavioral visceral pain-like responses. The numbers of these responses in the colitis model mice were 3 times higher than in control mice, and were decreased by pretreatment with the TRPM8 channel blocker AMTB. CONCLUSIONS & INFERENCES Increased expression of TRPM8 may contribute to the visceral hyperalgesia of experimental colitis.
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Affiliation(s)
- T Hosoya
- Department of Pharmacology, Faculty of Pharmaceutical Sciences, Josai International University, Togane, Japan; Department of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University, Chiba, Japan
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de Zanette SA, Vercelino R, Laste G, Rozisky JR, Schwertner A, Machado CB, Xavier F, de Souza ICC, Deitos A, Torres ILS, Caumo W. Melatonin analgesia is associated with improvement of the descending endogenous pain-modulating system in fibromyalgia: a phase II, randomized, double-dummy, controlled trial. BMC Pharmacol Toxicol 2014; 15:40. [PMID: 25052847 PMCID: PMC4119581 DOI: 10.1186/2050-6511-15-40] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Accepted: 07/16/2014] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Central disinhibition is a mechanism involved in the physiopathology of fibromyalgia. Melatonin can improve sleep quality, pain and pain threshold. We hypothesized that treatment with melatonin alone or in combination with amitriptyline would be superior to amitriptyline alone in modifying the endogenous pain-modulating system (PMS) as quantified by conditional pain modulation (CPM), and this change in CPM could be associated with serum brain-derived neurotrophic factor (BDNF). We also tested whether melatonin improves the clinical symptoms of pain, pain threshold and sleep quality. METHODS Sixty-three females, aged 18 to 65, were randomized to receive bedtime amitriptyline (25 mg) (n = 21), melatonin (10 mg) (n = 21) or melatonin (10 mg) + amitriptyline (25 mg) (n = 21) for a period of six weeks. The descending PMS was assessed with the CPM-TASK. It was assessed the pain score on the Visual Analog Scale (VAS 0-100 mm), the score on Fibromyalgia Impact Questionnaire (FIQ), heat pain threshold (HPT), sleep quality and BDNF serum. Delta values (post- minus pre-treatment) were used to compare the treatment effect. The outcomes variables were collected before, one and six weeks after initiating treatment. RESULTS Melatonin alone or in combination with amitriptyline reduced significantly pain on the VAS compared with amitriptyline alone (P < 0.01). The delta values on the VAS scores were-12.85 (19.93),-17.37 (18.69) and-20.93 (12.23) in the amitriptyline, melatonin and melatonin+amitriptyline groups, respectively. Melatonin alone and in combination increased the inhibitory PMS as assessed by the Numerical Pain Scale [NPS(0-10)] reduction during the CPM-TASK:-2.4 (2.04) melatonin + amitriptyline,-2.65 (1.68) melatonin, and-1.04 (2.06) amitriptyline, (P < 0.05). Melatonin + amitriptyline treated displayed better results than melatonin and amitriptyline alone in terms of FIQ and PPT improvement (P < 0.05, fort both). CONCLUSION Melatonin increased the inhibitory endogenous pain-modulating system as assessed by the reduction on NPS(0-10) during the CPM-TASK. Melatonin alone or associated with amitriptyline was better than amitriptyline alone in improving pain on the VAS, whereas its association with amitriptyline produced only marginal additional clinical effects on FIQ and PPT. TRIAL REGISTRATION Current controlled trail is registered at clinical trials.gov upon under number NCT02041455. Registered January 16, 2014.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Wolnei Caumo
- Pain and Palliative Care Service at the Hospital de Clínicas de Porto Alegre (HCPA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.
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Abstract
Neurotrophin family are traditionally recognized for their nerve growth promoting function and are recently identified as crucial factors in regulating neuronal activity in the central and peripheral nervous systems. The family members including nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), and neurotrophin-3 (NT-3) are reported to have distinct roles in the development and maintenance of sensory phenotypes in normal states and in the modulation of sensory activity in disease. This paper highlights receptor tyrosine kinase (Trk) -mediated signal transduction by which neurotrophins regulate neuronal activity in the visceral sensory reflex pathways with emphasis on the distinct roles of NGF and BDNF signaling in physiologic and pathophysiological processes. Viscero-visceral cross-organ sensitization exists widely in human diseases. The role of neurotrophins in mediating neural cross talk and interaction in primary afferent neurons in the dorsal root ganglia (DRG) and neurotrophin signal transduction in the context of cross-organ sensitization are also discussed.
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Affiliation(s)
- Li-Ya Qiao
- Department of Physiology and Biophysics, School of Medicine, Virginia Commonwealth University, Richmond, VA 23298, USA
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Pan XQ, Malykhina AP. Estrous cycle dependent fluctuations of regulatory neuropeptides in the lower urinary tract of female rats upon colon-bladder cross-sensitization. PLoS One 2014; 9:e94872. [PMID: 24788240 PMCID: PMC4006778 DOI: 10.1371/journal.pone.0094872] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Accepted: 03/20/2014] [Indexed: 12/30/2022] Open
Abstract
Co-morbidity of bladder, bowel, and non-specific pelvic pain symptoms is highly prevalent in women. Little evidence is present on modulation of pelvic pain syndromes by sex hormones, therefore, the objective of this study was to clarify the effects of hormonal fluctuations within the estrous cycle on regulatory neuropeptides in female rats using a model of neurogenic bladder dysfunction. The estrous cycle in female rats (Sprague-Dawley, 230-250 g) was assessed by vaginal smears and weight of uterine horns. Neurogenic bladder dysfunction was induced by a single inflammatory insult to the distal colon. Protein expression of calcitonin gene related peptide (CGRP), substance P (SP), nerve growth factor (NGF), and brain derived neurotrophic factor (BDNF) in the pelvic organs, sensory ganglia and lumbosacral spinal cord was compared in rats in proestrus (high estrogen) vs diestrus (low estrogen). Under normal physiological conditions, concentration of SP and CGRP was similar in the distal colon and urinary bladder during all phases of the estrous cycle, however, acute colitis induced a significant up-regulation of CGRP content in the colon (by 63%) and urinary bladder (by 54%, p≤0.05 to control) of rats in proestrus. These changes were accompanied by a significant diminution of CGRP content in L6-S2 DRG after colonic treatment, likely associated with its release in the periphery. In rats with high estrogen at the time of testing (proestrus), experimental colitis caused a significant up-regulation of BDNF colonic content from 26.1±8.5 pg/ml to 83.4±32.5 pg/ml (N = 7, p≤0.05 to control) and also induced similar effects on BDNF in the urinary bladder which was also up-regulated by 5-fold in rats in proestrus (p≤0.05 to respective control). Our results demonstrate estrous cycle dependent fluctuations of regulatory neuropeptides in the lower urinary tract upon colon-bladder cross-sensitization, which may contribute to pain fluctuations in female patients with neurogenic bladder pain.
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Affiliation(s)
- Xiao-Qing Pan
- Division of Urology, Department of Surgery, University of Pennsylvania, Glenolden, Pennsylvania, United States of America
| | - Anna P. Malykhina
- Division of Urology, Department of Surgery, University of Pennsylvania, Glenolden, Pennsylvania, United States of America
- * E-mail:
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