Colony-stimulating factor-1: a potential biomarker for lupus nephritis

Area of Science:

• Nephrology
• Immunology
• Biomarker Discovery

Background:

• Lupus nephritis (LN) requires noninvasive predictors for timely treatment.
• Colony-stimulating factor-1 (CSF-1) is implicated in kidney inflammation during LN.

Purpose of the Study:

• To determine if serum/urine CSF-1 levels correlate with kidney pathology and predict LN onset/recurrence in systemic lupus erythematosus (SLE).

Main Methods:

• Measured serum and urine CSF-1 levels in SLE patients.
• Correlated CSF-1 levels with intrarenal inflammation and histopathology.
• Longitudinally monitored CSF-1 levels to predict LN onset and recurrence.

Main Results:

• Elevated CSF-1 levels were significantly higher in LN patients compared to other SLE manifestations.
• Serum/urine CSF-1 levels correlated with kidney inflammation and histopathology.
• Rising CSF-1 levels predicted LN onset and recurrence before clinical or conventional marker evidence.

Conclusions:

• Serum and urine CSF-1 are promising noninvasive biomarkers for predicting LN onset and recurrence.
• CSF-1 monitoring may offer a more accurate method than conventional tests for assessing renal disease activity in SLE.
• This approach could enable earlier intervention and personalized treatment strategies for LN.