Esophageal sensitivity

Esophageal sensitivity refers to the physiological process by which the esophagus perceives and responds to various stimuli, including chemical (acid, bile), mechanical (distension), and thermal triggers (Fass & Tougas, 2002). In healthy individuals, this sensitivity is part of normal visceral sensation; however, in conditions like gastroesophageal reflux disease (GERD) and functional esophageal disorders, patients often exhibit esophageal hypersensitivity (Aziz et al., 2016). This hypersensitivity involves an exaggerated response to normal or sub-threshold stimuli, often mediated by peripheral sensitization of nociceptors such as Transient Receptor Potential Vanilloid 1 (TRPV1) or Acid-Sensing Ion Channels (ASICs) and central sensitization within the spinal cord or brain (Yamashita et al., 2021). While not a single molecular target itself, esophageal sensitivity is a key clinical endpoint and physiological state targeted by various pharmacological interventions, including acid suppressants and visceral neuromodulators (Dickman et al., 2007). Understanding the pathways of esophageal nociception is crucial for treating non-cardiac chest pain and refractory heartburn (Knowles & Aziz, 2009).

Other names

Esophageal hypersensitivityVisceral hypersensitivity of the esophagusEsophageal nociceptionEsophageal sensory perception

Pharmacological management typically involves acid suppression to reduce chemical stimuli or the use of visceral neuromodulators to alter the processing of sensory information in the peripheral and central nervous systems.