Macrophages as a Source and Target of GDF-15

Area of Science:

• Immunology
• Cell Biology
• Biochemistry

Background:

• Growth differentiation factor 15 (GDF-15) is a cytokine in the TGF-β superfamily.
• GDF-15 is linked to immune tolerance and elevated in stress conditions, impacting disease severity and prognosis in cancer and metabolic/cardiovascular disorders.
• Its precise molecular mechanisms and cell-specific effects require further elucidation.

Purpose of the Study:

• To review the physiological and pathological interactions between GDF-15 and macrophages.
• To discuss the therapeutic potential and challenges of GDF-15 in clinical translation.

Main Methods:

• Literature review summarizing existing research on GDF-15 and macrophages.
• Analysis of GDF-15's role in macrophage function, including cytokine production and phenotype switching.
• Discussion of current and future therapeutic strategies involving GDF-15.

Main Results:

• GDF-15 expression is stimulated by inflammatory mediators but often exerts anti-inflammatory and pro-fibrotic effects.
• Macrophages produce GDF-15 under stress, potentially driving fibrogenesis and angiogenesis.
• Macrophages can adopt a tolerogenic phenotype in response to GDF-15.

Conclusions:

• GDF-15 plays a complex, context-dependent role in macrophage biology.
• Further research into GDF-15-macrophage interactions is crucial for advancing GDF-15-based therapeutics.
• Therapeutic strategies targeting GDF-15, such as analogs or antibodies, show promise but face challenges in clinical translation.