Ace Deficiency Induces Intestinal Inflammation in Zebrafish

Area of Science:

• Gastroenterology
• Immunology
• Genetics

Background:

• Inflammatory bowel disease (IBD) is a chronic, relapsing intestinal inflammatory condition with unclear pathogenesis.
• The role of angiotensin-converting enzyme (ACE) in intestinal homeostasis and IBD is not well understood.

Purpose of the Study:

• To investigate the role of angiotensin-converting enzyme (ACE) in the development of intestinal inflammation.
• To identify potential therapeutic targets for inflammatory bowel disease (IBD).

Main Methods:

• Utilized zebrafish models with and without the angiotensin-converting enzyme (ACE) gene.
• Induced intestinal inflammation using dextran sodium sulfate (DSS) in zebrafish.
• Quantified inflammatory marker gene expression (il1b, mmp9, mpx, lect2l, cxcl8b) and mucus secretion.

Main Results:

• Zebrafish lacking the angiotensin-converting enzyme (ACE) gene exhibited significant intestinal inflammation.
• Increased expression of key inflammatory markers (il1b, mmp9, mpx, lect2l, cxcl8b) was observed in ACE-deficient zebrafish.
• ACE-deficient zebrafish showed heightened susceptibility to dextran sodium sulfate (DSS)-induced enteritis and increased mucus secretion.

Conclusions:

• Angiotensin-converting enzyme (ACE) plays a critical role in maintaining intestinal homeostasis.
• ACE deficiency exacerbates intestinal inflammation, highlighting its potential as a therapeutic target for inflammatory bowel disease (IBD).