Effectiveness of Red Onion Extract (Allium Cepa) on the Elongation of Papillae and Neutrophil Cell in the Gastroesophageal Junction (GEJ) of Sprague Dawley Strain Rats Gastroesophageal Reflux Disease (GERD) Model

Background: Gastroesophageal acid reflux disease (GERD) is a disorder caused by the reflux of stomach acid when the lower esophageal sphincter (LES) relaxes with a prevalence of around 1.03 billion worldwide. One of the supporting examinations carried out to diagnose GERD is a histopathological examination. This study aims to determine the effect of red onion extract on the papillae elongation and neutrophil cells of the gastroesophageal junction in Sprague Dawley rats. Methods: This experimental study was conducted on Sprague Dawley rats induced with 1 mL of HCl + 1 mL of ascorbic acid, administered into the gastric cardia of the rats, mixed with 1 mL of sodium thiocyanate (NaSCN) and 1.5 mL of sodium nitrite (NaNO₃) to develop a GERD model. The rats were then divided into ten groups with different treatments, including red onion extract (250, 500, 750 mg/kgBW) and PPI (pantoprazole). Results: It was stated that there was a significant relationship between the effect of red onions and changes in papillae elongation in rats induced by GERD (P-value 0.05). The neutrophil cells showed no significance on the impact of red onion (p-value 0,05). Nor are the papillae elongation and the neutrophil cell changes dose-dependent.Conclusion: A significant reduction in the histopathological appearance of papillae elongation was seen in the majority of the population. However, no significant results were found for the different doses of shallot extract.Keywords: Gastroesophageal acid reflux disease, allium cepa, papillae elongation, red onion extract, neutrophil cells