Gender-specific remodeling in atrial fibrillation?

Area of Science:

• Cardiology
• Biochemistry
• Pathology

Background:

• Atrial fibrillation (AF) is associated with cardiac remodeling.
• The role of gender in AF-related remodeling of gap junction proteins, collagen, and amyloid is not fully understood.

Purpose of the Study:

• To investigate potential gender-dependent differences in atrial remodeling in patients with AF.
• To examine the expression of connexin40 (Cx40), connexin43 (Cx43), collagen I, and amyloid in relation to AF and gender.

Main Methods:

• Biochemical and histochemical analyses were performed on atrial tissue from 123 patients undergoing cardiac surgery.
• Patients were categorized by heart rhythm (sinus rhythm or AF) and gender.

Main Results:

• Atrial fibrillation (AF) increased levels of Cx40, Cx43, and collagen I.
• Upregulation of Cx40 was significantly higher in female patients with AF compared to males.
• No significant gender differences were observed for AF-induced changes in collagen I or Cx43; amyloid deposition was age-related, not linked to AF or gender.

Conclusions:

• Cardiac remodeling in AF appears largely similar between genders.
• A tendency for stronger AF-induced changes in Cx40 was noted in women, potentially a secondary effect.
• No significant gender-based disparities were found in AF-related collagen or Cx43 remodeling.