Clr-f expression regulates kidney immune and metabolic homeostasis

Area of Science:

• Immunology
• Molecular Biology
• Nephrology

Background:

• The C-type lectin-related protein, Clr-f (encoded by Clec2h), is part of a family of immune regulatory lectins.
• Clr-f is highly expressed in the kidney, but its function there is unknown.

Purpose of the Study:

• To investigate the role of Clr-f in kidney health and function.
• To understand the impact of Clr-f deficiency on renal immune and metabolic processes.

Main Methods:

• Generation of Clr-f-deficient (Clr-f^-/-) mice via targeted gene deletion.
• Analysis of kidney pathology, including glomerular and tubular lesions, and immune cell infiltration.
• Whole kidney transcriptional profiling to assess gene expression changes related to lipid metabolism, stress, and inflammation.

Main Results:

• Clr-f^-/- mice exhibited glomerular and tubular lesions, immunoglobulin and C3 complement deposits, and significant lipid accumulation.
• Transcriptional analysis revealed dysregulation in lipid metabolism, stress responses, and inflammatory mediators in Clr-f^-/- kidneys.
• Elevated IL-12 and IFNγ, along with neutrophil, T cell, and B cell infiltration, were observed. Renal pathogenesis occurred independently of T and B lymphocytes.

Conclusions:

• Clr-f plays a significant role in maintaining kidney immune and metabolic homeostasis.
• Deficiency in Clr-f leads to renal pathology and metabolic dysregulation, highlighting its importance in kidney function.