Collectin-11 Promotes the Development of Renal Tubulointerstitial Fibrosis

Area of Science:

• Immunology
• Nephrology
• Pathology

Background:

• Collectin-11 is a pattern recognition molecule involved in innate immunity.
• Its role in tissue fibrosis, particularly renal fibrosis, is largely unknown.

Purpose of the Study:

• To investigate the role of collectin-11 in renal ischemia-reperfusion injury and subsequent tubulointerstitial fibrosis.
• To explore the mechanisms by which collectin-11 influences renal fibrosis.

Main Methods:

• Utilized collectin-11 deficient (CL-11-/-) and wild-type mice subjected to renal ischemia-reperfusion injury.
• Assessed renal function, tubular injury, leukocyte infiltration, inflammation, and collagen deposition.
• Performed in vitro studies using recombinant collectin-11 to evaluate its effects on leukocyte migration and fibroblast proliferation.
• Examined kidney grafts from CL-11-/- and wild-type mice after syngeneic transplantation.

Main Results:

• CL-11-/- mice exhibited significantly reduced renal functional impairment, tubular injury, inflammation, fibrogenesis, and collagen deposition post-injury compared to controls.
• Collectin-11 promoted leukocyte migration and renal fibroblast proliferation in a carbohydrate-dependent manner in vitro.
• Kidney grafts from CL-11-/- mice showed decreased tubular injury and collagen deposition after transplantation.

Conclusions:

• Collectin-11 plays a pathogenic role in the development of tubulointerstitial fibrosis after renal ischemia-reperfusion injury.
• Local collectin-11 promotes fibrosis by enhancing leukocyte chemotaxis and renal fibroblast proliferation.
• These findings may have implications for chronic kidney disease (CKD) pathogenesis from various causes.