Video Experimental Relacionado
Updated: Aug 14, 2026

05:19
Surgical Models of Gastroesophageal Reflux with Mice
Published on: August 25, 2015
Reflujo duodeno-gástrico - un factor común en la patogénesis de úlceras gástricas y duodenales
Lancet (London, England)
|November 29, 1980
Resumen
El reflujo duodeno-gástrico puede causar úlceras gástricas y duodenales al alterar la actividad de la somatostatina, lo que lleva a un aumento de la secreción de ácido. Este defecto hormonal se propone como un factor común en la patogénesis de la úlcera.
Área de la Ciencia:
- Gastroenterología y Gastroenterología.
- Fisiología Fisiología Fisiología.
- Patología Patología Patología.
Sus antecedentes:
- El reflujo duodeno-gástrico está relacionado con úlceras gástricas y duodenales.
- El reflujo causa aumento de la secreción ácida y hipergastrinemia.
- El reflujo alcalino puede alterar la actividad de la somatostatina, afectando la función gástrica.
Objetivo del estudio:
- Para investigar el papel del reflujo duodeno-gástrico en la patogénesis de las úlceras.
- Para explorar el mecanismo propuesto que involucra la actividad alterada de la somatostatina.
- Para identificar el reflujo duodeno como un factor común en las úlceras gástricas y duodenales.
Principales métodos:
- Estudio de observación de pacientes con úlceras gástricas y duodenales.
- Análisis de la secreción ácida en respuesta a la pentagastrina.
- Evaluación de los niveles de gastrina después de las comidas.
- Evaluación de la actividad de la somatostatina en relación con la composición del reflujo.
Principales resultados:
- El aumento del reflujo duodeno-gástrico se correlaciona con la hipersecreción y la hipergastrinemia.
- Los componentes de reflujo alcalino o pancreático están implicados en cambios funcionales.
- El reflujo confinado al antrum conduce a la ulceración duodenal.
- El reflujo que afecta al cuerpo gástrico causa gastritis y una ulceración potencial.
Conclusiones:
- El reflujo duodeno-gástrico es un factor potencialmente común en la patogénesis de las úlceras gástricas y duodenales.
- La actividad alterada de la somatostatina debido al reflujo es el mecanismo de mediación propuesto.
- Los defectos hormonales inducidos por el reflujo pueden ser la base del desarrollo de úlceras.
Más Videos Relacionados
Videos de Conceptos Relacionados
Pathophysiology of Peptic Ulcer Disease: Injurious Factors
Peptic ulcers are sores on the stomach's inner lining and the upper small intestine, which are the result of disruptions in the mucosal layer that houses parietal cells which produce gastric acid, and chief cells which secrete pepsinogen.
In the antrum region, G cells secrete the gastrin hormone that binds to gastrin-cholecystokinin-B (CCK2) receptors on parietal and enterochromaffin-like (ECL) cells in the fundic glands. Simultaneously, the vagus nerve releases acetylcholine, which binds to M3...
In the antrum region, G cells secrete the gastrin hormone that binds to gastrin-cholecystokinin-B (CCK2) receptors on parietal and enterochromaffin-like (ECL) cells in the fundic glands. Simultaneously, the vagus nerve releases acetylcholine, which binds to M3...
Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors
Peptic ulcer disease, commonly called PUD, represents a multifaceted condition characterized by disruptions in the lining of the gastrointestinal (GI) tract. Central to the protection of the gastrointestinal lining is the mucosal-bicarbonate barrier. This physiological defense mechanism is a formidable shield against the corrosive effects of gastric acid and pepsin secretion in the stomach. Its role is pivotal in maintaining the structural integrity of the stomach's inner lining. Bicarbonate,...
Peptic Ulcer Disease I: Introduction
Peptic Ulcer Disease (PUD) is characterized by mucosal excavation in the esophagus, stomach, pylorus, or duodenum. It can manifest as acute or chronic based on the extent and duration of mucosal involvement.
An acute ulcer, marked by superficial erosion and minimal inflammation, swiftly resolves upon identifying and addressing the underlying cause. In contrast, a chronic ulcer persists, potentially eroding through the muscular wall and forming fibrous tissue.
Peptic ulcers can also be...
An acute ulcer, marked by superficial erosion and minimal inflammation, swiftly resolves upon identifying and addressing the underlying cause. In contrast, a chronic ulcer persists, potentially eroding through the muscular wall and forming fibrous tissue.
Peptic ulcers can also be...
Peptic Ulcer Disease II: Pathophysiology
Peptic Ulcer Disease (PUD) is characterized by the development of ulcers in the stomach or duodenal mucosa. Its pathophysiology is complex, involving a balance between damaging and protective elements.
Damaging agents such as Helicobacter pylori, gastric acid, pepsin, and nonsteroidal anti-inflammatory drugs (NSAIDs) can weaken the mucosal defense, allowing hydrogen ions to infiltrate back and harm epithelial cells.
Damaging agents such as Helicobacter pylori, gastric acid, pepsin, and nonsteroidal anti-inflammatory drugs (NSAIDs) can weaken the mucosal defense, allowing hydrogen ions to infiltrate back and harm epithelial cells.
Peptic Ulcer Disease I: Introduction
Peptic ulcer disease (PUD) involves breaks in the gastrointestinal tract's mucosal lining, primarily in the stomach and duodenum, with less frequent occurrences in the lower esophagus or near the pylorus.Ulcers can be acute or chronic. Acute ulcers are short-lived with minimal inflammation and heal quickly after the irritant is removed. Chronic ulcers persist, may recur, and often cause scarring due to ongoing tissue damage. Superficial erosions affect only the mucosal layer and are called...
Peptic Ulcer Disease II: Pathophysiology
Peptic ulcer disease develops when protective mechanisms of the gastrointestinal mucosa are overwhelmed by harmful factors, leading to localized erosions in the stomach or proximal duodenum. The main causes are Helicobacter pylori infection and chronic use of nonsteroidal anti-inflammatory drugs (NSAIDs).Helicobacter pylori–Induced InjuryBacterial Adaptation and Colonization:H. pylori is a spiral, Gram-negative bacterium adapted to the acidic stomach. and transmitted through oral-oral or...

