Which glomerular cell type is primarily involved in phagocytosis of immune complexes and supports the capillary loops?

Which glomerular cell type is primarily involved in phagocytosis of immune complexes and supports the capillary loops?

• A. Endothelial cells
• B. Podocytes
• C. Mesangial cells
• D. Juxtaglomerular cells

Answer: (C)

Mesangial cells are located in the central part of the glomerulus, between the capillary loops, and they have phagocytic capabilities to clear immune complexes and debris. They also provide structural support by producing and organizing the mesangial matrix, helping to hold the capillary loops together. In addition, they can contract to regulate the surface area available for filtration, influencing glomerular blood flow and filtration rate. Endothelial cells line the capillary lumen and form part of the filtration barrier; podocytes are the visceral epithelial cells with foot processes covering the capillaries; juxtaglomerular cells are part of the juxtaglomerular apparatus and secrete renin. Thus, the cell type most involved in phagocytosis of immune complexes and supporting the capillary loops is the mesangial cell.

Mesangial cells are located in the central part of the glomerulus, between the capillary loops, and they have phagocytic capabilities to clear immune complexes and debris. They also provide structural support by producing and organizing the mesangial matrix, helping to hold the capillary loops together. In addition, they can contract to regulate the surface area available for filtration, influencing glomerular blood flow and filtration rate. Endothelial cells line the capillary lumen and form part of the filtration barrier; podocytes are the visceral epithelial cells with foot processes covering the capillaries; juxtaglomerular cells are part of the juxtaglomerular apparatus and secrete renin. Thus, the cell type most involved in phagocytosis of immune complexes and supporting the capillary loops is the mesangial cell.