Gender difference in gastro-esophageal reflux diseases

Area of Science:

• Gastroenterology and Oncology
• Endocrinology

Background:

• Esophageal adenocarcinoma (EAC) incidence has increased significantly in Western countries.
• The progression from gastro-esophageal reflux disease (GERD) to Barrett's esophagus (BE) and then to EAC is well-documented.
• A strong male predominance exists for GERD, BE, and EAC, with unclear mechanisms.

Purpose of the Study:

• To investigate the role of estrogen in the gender disparity observed in GERD, BE, and EAC.
• To explore how estrogen's anti-inflammatory and metabolic functions might influence disease development and progression.

Main Methods:

• Review of epidemiological studies on GERD, BE, and EAC prevalence in relation to gender and reproductive status.
• Analysis of in vivo studies examining estrogen's effects on mast cells and esophageal epithelial resistance.
• Consideration of research on estrogen's impact on fat metabolism and obesity as a risk factor.

Main Results:

• Estrogen's anti-inflammatory properties, potentially via mast cell inactivation, may contribute to gender differences in the GERD spectrum.
• Estrogen's influence on fat metabolism and its potential to enhance esophageal epithelial resistance to refluxate are highlighted.
• These estrogenic effects may explain the delayed onset of BE and EAC in women, contributing to male predominance.

Conclusions:

• The estrogen-related endocrine milieu may play a protective role against GERD progression toward carcinogenesis in women.
• Understanding estrogen's mechanisms could lead to novel therapeutic alternatives beyond conventional acid suppressors.
• Further research into estrogen's role is crucial for developing targeted therapies for esophageal adenocarcinoma.