Ion Transport Modulators Differentially Modulate Inflammatory Responses in THP-1-Derived Macrophages

Area of Science:

• Immunology
• Pharmacology
• Cell Biology

Background:

• Ion transport modulators are widely used for noncommunicable diseases like diabetes and hypertension.
• Their immunomodulatory effects are not fully understood, despite binding to immune cell receptors.

Purpose of the Study:

• To investigate the immunomodulatory properties of thirteen FDA-approved ion transport modulators.
• To assess their impact on macrophage inflammatory responses.

Main Methods:

• THP-1-derived macrophages were stimulated with *Mycobacterium bovis* BCG.
• Effects on superoxide production, nitric oxide production, and cytokine expression (IL-1β, TNF-α) were measured.

Main Results:

• Most tested drugs inhibited nitric oxide and superoxide production.
• Several drugs enhanced the expression of IL-1β and TNF-α.
• The drugs exhibited a dual effect, inhibiting some inflammatory pathways while promoting others.

Conclusions:

• Ion pumps and channels represent potential targets for developing selective immunomodulatory agents.
• These modulators may offer a novel approach to immune modulation without causing broad immunosuppression.