Intestinal and Blood-Brain Barrier Dysfunction in Lupus: Emerging Mechanisms and Modulation by Cinnamon

Area of Science:

• Immunology
• Neuroscience
• Gastroenterology

Background:

• Systemic lupus erythematosus (SLE) is a complex autoimmune disease.
• Gut and blood-brain barriers (BBBs), crucial for immune regulation, are implicated in SLE pathogenesis.
• Tight junction (TJ) dysfunction in these barriers contributes to SLE progression.

Purpose of the Study:

• To review the role of gut and BBB dysfunction in SLE.
• To explore cinnamon's potential as a therapeutic agent for SLE by targeting TJ.
• To highlight findings from animal studies on cinnamon's effects.

Main Methods:

• Narrative review of existing literature.
• Analysis of experimental evidence from lupus animal models.
• Focus on studies investigating TJ integrity, barrier permeability, and neuroinflammation.

Main Results:

• TJ disruption is linked to increased intestinal permeability, altered gut microbiota, and liver inflammation in lupus models.
• Cinnamon demonstrated restorative effects on gut barrier function, microbiota, and the gut-liver axis in pre-clinical studies.
• Cinnamon protected the BBB in a murine model, improving TJ localization and alleviating neuropsychiatric symptoms.

Conclusions:

• Gut and BBB integrity are critical in SLE pathogenesis.
• Cinnamon shows promise in restoring barrier function and reducing inflammation in SLE.
• Further research, including translational studies, is warranted to explore cinnamon's therapeutic potential for SLE via the gut-brain axis.