Relationship between Macrophages and Tissue Microenvironments in Diabetic Kidneys

Area of Science:

• Nephrology
• Immunology
• Diabetology

Background:

• Diabetic nephropathy (DN) is a primary cause of end-stage kidney disease.
• Inflammation and macrophage accumulation are key factors in DN development and progression.
• Macrophage phenotypes (M1/M2) are plastic and influenced by the renal microenvironment.

Purpose of the Study:

• To review the role of macrophages in diabetic nephropathy.
• To highlight macrophage heterogeneity and plasticity in DN.
• To explore therapeutic strategies targeting macrophages in DN.

Main Methods:

• Review of current scientific literature on DN and macrophage biology.
• Analysis of findings from single-cell RNA sequencing studies in DN.
• Examination of the interplay between renal cells and macrophages.

Main Results:

• Macrophage accumulation correlates with DN progression.
• Distinct M1 and M2 macrophage phenotypes contribute to DN pathology, including inflammation and fibrosis.
• Single-cell RNA sequencing reveals macrophage heterogeneity and plasticity in DN.
• Intrinsic renal cells and the microenvironment modulate macrophage behavior.

Conclusions:

• Macrophage phenotype and plasticity are critical in DN.
• Therapeutic strategies targeting macrophage depletion, polarization, or autophagy show promise for DN treatment.