An "esophageal rosette" sign is useful for predicting favorable outcomes in peroral endoscopic myotomy for esophageal achalasia.

Background: An "esophageal rosette" (ER) sign is one of the endoscopic findings in primary esophageal achalasia. We investigated whether ER was associated with the therapeutic efficacy of peroral endoscopic myotomy (POEM).

Methods: The clinical characteristics and short-term outcomes of POEM were retrospectively evaluated in 69 patients who underwent the procedure for esophageal achalasia.

Clinical characteristics of patients with eosinophilic esophagitis and eosinophilic esophageal myositis based on esophageal motility.

Background: Eosinophilic esophagitis (EoE) presents with various esophageal motility disorders, and some cases of hypercontractile esophagus (HE) are associated with eosinophilic esophageal myositis (EoEM). This study aimed to compare the clinical characteristics of patients with EoE and EoEM according to their esophageal motility.

Methods: The 28 patients with EoE and 2 patients with EoEM were divided into three groups based on esophageal motility: normal motility group, hypomotility group, and spastic contraction group.

Nocturnal Gastroesophageal Reflux and Sleep Depth in Healthy Adults, as Measured by Portable High-Resolution Manometry, Esophageal pH, and Electroencephalography.

Background: The primary mechanism of diurnal gastroesophageal reflux (GER) is transient lower esophageal sphincter relaxation (TLESR) in both healthy persons and patients with gastroesophageal reflux disease (GERD). However, few studies have examined nocturnal GER. Using portable high-resolution manometry (HRM), esophageal pH, and electroencephalography (EEG), we investigated the association of onset of nocturnal GER with sleep depth in healthy Japanese adults.

Factors associated with prevalence and severity of erosive tooth wear in patients with reflux oesophagitis.

Background: Extrinsic factors for erosive tooth wear (ETW) have been widely reported, but the intrinsic factors for wear remain unclear.

Objectives: The aim of this study was to evaluate the factors associated with the prevalence of ETW in patients with reflux oesophagitis (RO). To prevent severe ETW with RO, factors associated with severity of ETW were also evaluated.

In females, salivary secretion was significantly lower in patients with severe reflux esophagitis than in healthy controls.

Background: The salivary secretion in patients with mild reflux esophagitis (RE) and non-erosive reflux disease is significantly lower in females, but not in males. However, sex differences in salivary secretion in patients with severe RE remain unknown. Therefore, the present study investigated sex differences in saliva secretion in patients with severe RE.

Does severe and chronic esophageal distension by air (observed in SGB and GB) affect the esophageal mucosa integrity (MNBI).

Background: Supragastric belching (SGB) and aerophagia are behavioral disorders characterized by air induced esophageal distension. SGB is known to be associated with Gastro Esophageal Reflux Disease (GERD). Low Mean Nocturnal Baseline Impedance (MNBI) values support GERD diagnosis.

Among females older than 50 years, saliva secretion is significantly lower in non-erosive reflux disease patients than in healthy controls.

Background: Saliva secretion is significantly lower in patients with non-erosive reflux disease (NERD) than in healthy controls (HC). A previous study on HC showed that saliva secretion was lower in females than in males. Saliva secretion may be lower in female patients with NERD than in male patients.

Patients with gastroesophageal reflux disease (both reflux oesophagitis and non-erosive reflux disease): Prevalence and severity of erosive tooth wear and saliva properties.

Background: The prevalence between erosive tooth wear (ETW) in association with reflux oesophagitis (RO) has been reported. However, the severity of both diseases and the relationship between ETW and non-erosive reflux disease (NERD) is unclear.

Objectives: The prevalence and severity of ETW were investigated in RO, NERD and healthy controls.

Spin-Derived Electric Polarization and Chirality Density Inherent in Localized Electron Orbitals.

In solid state physics, any phase transition is commonly observed as a change in the microscopic distribution of charge, spin, or current. However, there is an exotic order parameter inherent in the localized electron orbitals that cannot be primarily captured by these three fundamental quantities. This order parameter is described as the electric toroidal multipoles connecting different total angular momenta under the spin-orbit coupling.

Effect of aging and obesity on esophageal mucosal integrity as measured by baseline impedance.

Aim: Low mean nocturnal baseline impedance (MNBI) values support gastroesophageal reflux disease (GERD) diagnosis. Recent data denote that age and obesity may affect MNBI. We aimed to evaluate diagnostic MNBI cutoffs as also the effect of aging and body mass index (BMI) on MNBI.

Significantly Lower Saliva Secretion in Females With Gastroesophageal Reflux Disease and Healthy Subjects Than in Males.

Objective: Saliva secretion in healthy subjects is lower in females than in males. The present study investigated sex differences in saliva secretion in patients with gastroesophageal reflux disease (GERD) and healthy controls.

Methods: This case-control study included 39 (male/female: 16/23) with non-erosive reflux disease (NERD), 49 (25/24) patients with mild reflux esophagitis, 45 (23/22) with severe reflux esophagitis (A1), and 46 (24/22) healthy controls.

Orientation of Lower Esophageal Sphincter Pressure Using Three-Dimensional High-Resolution Manometry in Patients with Achalasia: A Pilot Study.

Background: This study was performed to evaluate the orientation of lower esophageal sphincter (LES) pressure in patients with untreated achalasia using three-dimensional high-resolution manometry (3D-HRM).

Methods: The study involved 20 patients with untreated achalasia (10 men, 60 [47-74] years of age). The 3D-HRM assembly had 32 standard channels and 12 3D channels.

Saliva Secretion Is Significantly Lower in Female Patients with Mild Reflux Esophagitis than in Female Healthy Controls.

Introduction: Saliva secretion is significantly lower in patients with mild reflux esophagitis than in healthy controls. A previous study on healthy controls showed that stimulated saliva secretion was lower in females than in males. Saliva secretion may be lower in female patients with mild reflux esophagitis than in male patients.

Proton Pump Inhibitor Treatment Has Little Effects on Secretion of Saliva in Patients with Proton Pump Inhibitor-Responsive Mild Reflux Esophagitis and Non-Erosive Reflux Disease.

Introduction: The secretion of saliva, which is triggered by acid reflux into the esophagus via the esophagosalivary reflex, plays a crucial role in the defensive mechanisms of the esophagus. The volume of saliva secreted in patients with gastroesophageal reflux disease (GERD) is reduced. However, the effects of proton pump inhibitors (PPI) on the secretion of saliva have rarely been reported.

Evaluation of the circumferential location of mild reflux esophagitis (Grade A and B) in the lower esophagus.

Background And Aim: Discrepancies have been reported in the circumferential locations of mild mucosal breaks. We investigated their locations using a new method.

Methods: This is a retrospective study.

Smaller CO2 injection volume and lower gastric pressure induce bothersome symptoms in drug-resistant functional dyspepsia patients with less frequent belching.

Background: The relationship between bothersome symptoms and gastric pressure or CO2 injection volumes in drug-resistant functional dyspepsia (FD) patients remains unknown; therefore, this relationship was examined in drug-resistant FD and non-FD patients.

Methods: Thirty drug-resistant FD patients and 30 non-FD patients were recruited. Gastric pressure was assessed using an external pressure transducer, and the CO2 injection volume was measured using an endoscopic CO2-supplied device and flow meter.

Giant second harmonic transport under time-reversal symmetry in a trigonal superconductor.

Nonreciprocal or even-order nonlinear responses in symmetry-broken systems are powerful probes of emergent properties in quantum materials, including superconductors, magnets, and topological materials. Recently, vortex matter has been recognized as a key ingredient of giant nonlinear responses in superconductors with broken inversion symmetry. However, nonlinear effects have been probed as excess voltage only under broken time-reversal symmetry.

Determinants of reflux perception in patients with non-erosive reflux disease who have reflux-related symptoms on potassium-competitive acid blocker therapy.

Background: This study investigated potential determinants of reflux perception in patients with non-erosive reflux disease (NERD) who had reflux-related symptoms on potassium-competitive acid blocker (P-CAB) therapy.

Methods: This study included 23 patients with reflux-related symptoms despite P-CAB therapy. Esophageal impedance-pH monitoring was performed on P-CAB and the following potential determinants of reflux perception were investigated: reflux nadir pH value; change in pH (baseline-nadir); bolus clearance time; reflux extent; proportions of acid, weakly acidic, and weakly alkaline reflux episodes; and proportions of liquid and mixed reflux episodes.

Saliva secretion is reduced in mild reflux esophagitis patients.

Background: Salivary secretion in patients with mild reflux esophagitis has not been examined. In this study, saliva secretion and salivary epidermal growth factor (EGF) in patients with mild reflux esophagitis were investigated.

Methods: Thirty-eight mild reflux esophagitis patients and 38 control subjects were recruited for this case-control study.

New endoscopic method for gastric hypersensitivity testing: Pilot study.

Background And Aim: Although one of the causes of dyspeptic symptoms in functional dyspepsia patients is gastric hypersensitivity, there is currently no routine endoscopic gastric hypersensitivity test. We developed a new endoscopic method for gastric hypersensitivity testing. The aim of the present study was to investigate whether this method is useful for evaluating gastric hypersensitivity in drug-resistant functional dyspepsia patients who were strongly suspected of having gastric hypersensitivity.