Bioactive lipid mediators in polycystic kidney disease

Area of Science:

• Nephrology
• Biochemistry
• Inflammation Research

Background:

• Limited data exists on inflammatory activity in autosomal dominant polycystic kidney disease (ADPKD).
• Inflammation is hypothesized as an upstream event in ADPKD pathogenesis, potentially influencing disease severity and progression.

Purpose of the Study:

• To investigate inflammatory markers in ADPKD patients.
• To determine if these markers correlate with estimated glomerular filtration rate (eGFR) and total kidney volume (TKV) to assess ADPKD severity.

Main Methods:

• Targeted mass spectrometry (MS) analysis of bioactive lipid mediators in serum from ADPKD patients and healthy subjects.
• Correlation analysis of lipid mediators with eGFR and TKV normalized to body surface area (BSAR).

Main Results:

• ADPKD patients showed elevated levels of lipoxygenase (LOX) and cyclooxygenase products, including HODEs and HETEs, compared to healthy controls.
• Specific lipid mediators like 9-HODE, 13-HODE, 15-HETE, and 20-HETE significantly correlated with eGFR and TKV/BSAR.
• Perturbations in fatty acid metabolism were observed early in ADPKD, even with preserved kidney function.

Conclusions:

• Inflammatory pathways involving LOX are active early in ADPKD.
• These pathways and specific lipid mediators are associated with ADPKD severity.
• Targeting LOX pathways could be a therapeutic strategy to slow ADPKD progression.