#0851 Urinary Tenascin C predicts kidney function loss in lupus nephritis 170 AMP-LN patients: Tenascin C (from renal myofibroblasts) was the top predictor of eGFR decline (HR 4.6) Proteomic 11-marker risk score (AUC 0.91) outperformed proteinuria for prognosis #ACR25 @RheumNow