Abstract
Background and Aims
Esophageal visceral hypersensitivity has been proposed to be a pathogenesis of heartburn in nonerosive reflux disease (NERD), but its further mechanisms are unclear. Recently, it has been suggested that nociceptors and neuropeptides control sensory and pain mechanisms. Therefore, the objective of the present study was to estimate expression of acid-sensitive nociceptors such as transient receptor potential vanilloid 1 (TRPV1) and acid-sensing ion channel 3, protease-activated receptor 2 (PAR2), neuropeptides such as substance P and calcitonin-gene-related peptide, and their receptors such as neurokinin 1 receptor (NK1R) and receptor activity-modifying protein 1 in the esophageal mucosa of NERD patients.
Methods
Biopsy samples were taken from NERD patients and healthy control subjects without heartburn. The expression level of nociceptors, neuropeptides, and their receptors were assessed by real-time RT-PCR and enzyme immunoassay. Localization of substance P and CGRP in the esophageal mucosa was determined by immunohistochemical staining.
Results
Expression of mRNA for TRPV1 and PAR2 was significantly elevated in the esophageal mucosa of NERD patients. Substance P protein level and its receptor NK1R mRNA also increased in NERD patients. A positive correlation between the substance P protein level and reflux symptoms was observed. Immunohistochemical study revealed the presence of substance P-positive nerves in the lamina propria of the esophagus.
Conclusions
These findings suggest that visceral hypersensitivity in NERD patients is involved in neurogenic inflammation showing the increase in both substance P release and NK1R expression, which may be associated with the activation of TRPV1 and PAR2.
Similar content being viewed by others
References
Dean BB, Gano AD Jr, Knight K, Ofman JJ, Fass R. Effectiveness of proton pump inhibitors in nonerosive reflux disease. Clin Gastroenterol Hepatol. 2004;2:656–664.
Tytgat GN. Review article: treatment of mild and severe cases of GERD. Aliment Pharmacol Ther. 2002;16:73–78.
Yoshida N, Yoshikawa T. Defense mechanism of the esophageal mucosa and esophageal inflammation. J Gastroenterol. 2003;38:31–34.
Yoshida N, Uchiyama K, Kuroda M, et al. IL-8 expression in the esophageal mucosa of patients with gastroesophageal reflux disease. Scand J Gastroenterol. 2004;39:816–822.
Yoshida N. Inflammation and oxidative stress in gastroesophageal reflux disease. J Clin Biochem Nutr. 2007;40:13–23.
Barlow WL, Orlando RC. The pathogenesis of heartburn in nonerosive reflux disease: a unifying hypothesis. Gatroenterology. 2005;128:771–778.
Trimble KC, Pryde A, Heading RC. Lowered oesophageal sensory thresholds in patients with symptomatic but not excess gastro-oesophageal reflux: evidence for a spectrum of visceral sensitivity in GORD. Gut. 1995;37:7–12.
Miwa H, Minoo T, Hojo M, et al. Oesophageal hypersensitivity in Japanese patients with non-erosive gastro-oesophageal reflux diseases. Aliment Pharmacol Ther. 2004;20:112–117.
Matthews PJ, Aziz Q, Facer P, Davis JB, Thompson DG, Anand P. Increased capsaicin receptor TRPV1 nerve fibres in the inflamed human oesophagus. Eur J Gastroenterol Hepatol. 2004;16:897–902.
Bhat YM, Bielefeldt K. Capsaicin receptor (TRPV1) and non-erosive reflux disease. Eur J Gastroenterol Hepatol. 2006;18:263–270.
Wick EC, Hoge SG, Grahn SW, et al. Transient receptor potential vanilloid 1, calcitonin gene-related peptide, and substance P mediate nociception in acute pancreatitis. Am J Physiol Gastrointest Liver Physiol. 2006;290:G959–G969.
Engel MA, Khalil M, Mueller-Tribbensee SM, et al. The proximodistal aggravation of colitis depends on substance P released from TRPV1-expressing sensory neurons. J Gastroenterol. 2012;47:256–265.
Muñoz M, Coveñas R. NK-1 receptor antagonists: a new paradigm in pharmacological therapy. Curr Med Chem. 2011;18:1820–1831.
Tillisch K, Labus J, Nam B, et al. Neurokinin-1-receptor antagonism decreases anxiety and emotional arousal circuit response to noxious visceral distension in women with irritable bowel syndrome: a pilot study. Aliment Pharmacol Ther. 2012;35:360–367.
Marquez de Prado B, Hammond DL, Russo AF. Genetic enhancement of calcitonin gene-related peptide-induced central sensitization to mechanical stimuli in mice. J Pain. 2009;10:992–1000.
Cottrell GS, Alemi F, Kirkland JG, Grady EF, Corvera CU, Bhargava A. Localization of calcitonin receptor-like receptor (CLR) and receptor activity-modifying protein 1 (RAMP1) in human gastrointestinal tract. Peptides. 2012;35:202–211.
Yoshida N, Yoshikawa T. Basic and translational research on proteinase-activated receptors: implication of proteinase/proteinase-activated receptor in gastrointestinal inflammation. J Pharmacol Sci. 2008;108:415–421.
Vergnolle N, Bunnett NW, Sharkey KA, et al. Proteinase-activated receptor-2 and hyperalgesia: a novel pain pathway. Nat Med. 2001;7:821–826.
Bunnett NW. Protease-activated receptors: how proteases signal to cells to cause inflammation and pain. Semin Throm Hemost. 2006;32:39–48.
Huang SC. Protease-activated receptor-1(PAR1) and PAR2 but not PAR 4 mediate relaxations in lower esophageal sphincter. Regul Pept. 2006;142:37–43.
Carlsson R, Dent J, Bolling-Sternevald E, et al. The usefulness of a structured questionnaire in the assessment of symptomatic gastroesophageal reflux disease. Scand J Gastroenterol. 1998;33:1023–1029.
Revicki DA, Wood M, Wiklund I, Crawley J. Reliability and validity of the gastrointestinal symptom rating scale in patients with gastroesophageal reflux disease. Qual Life Res. 1998;7:75–83.
Pan XQ, Gonzalez JA, Chang S, Chacko S, Wein AJ, Malykhina AP. Experimental colitis triggers the release of substance P and calcitonin gene-related peptide in the urinary bladder via TRPV1 signaling pathways. Exp Neurol. 2010;225:262–273.
Humes DJ, Simpson J, Smith J, et al. Visceral hypersensitivity in symptomatic diverticular disease and the role of neuropeptides and low grade inflammation. Neurogastroenterol Motil. 2012;24:318–1630.
Guarino MP, Cheng L, Ma J, et al. Increased TRPV1 gene expression in esophageal mucosa of patients with non-erosive and erosive reflux disease. Neurogastroenterol Motil. 2010;22:746–751.
Tohda C, Sasaki M, Konemura T, et al. Axonal transport of VR1 capsaicin receptor mRNA in primary afferents and its participation in inflammation-induced increase in capsaicin sensitivity. J Neurochem. 2001;76:1628–1635.
Banerjee B, Medda BK, Lazarova Z, Bansal N, Shaker R, Sengupta JN. Effect of reflux-induced inflammation on transient receptor potential vanilloid one (TRPV1) expression in primary sensory neurons innervating the oesophagus of rats. Neurogastroenterol Motil. 2007;19:681–691.
Suzuki T, Yoshida N, Mizushima K, et al. TRPV1 expression associated with nerve growth factor mediates the esophageal visceral hypersensitivity. Gastroenterology. 2008;134:A-589–A-590.
Yoshida N, Katada K, Handa O, et al. Interleukin-8 production via protease-activated receptor 2 in human esophageal epithelial cells. Int J Mol Med. 2007;19:335–340.
Emerenziani S, Sifrim D, Habib FI, et al. Presence of gas in the refluxate enhances reflux perception in non-erosive patients with physiological acid exposure of the oesophagus. Gut. 2008;57:443–447.
Conflict of interest
None.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Yoshida, N., Kuroda, M., Suzuki, T. et al. Role of Nociceptors/Neuropeptides in the Pathogenesis of Visceral Hypersensitivity of Nonerosive Reflux Disease. Dig Dis Sci 58, 2237–2243 (2013). https://doi.org/10.1007/s10620-012-2337-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10620-012-2337-7