Correlation between Tubulointerstitial Lesion and Blood Pressure in Lupus Nephritis Patients: A Pathological, Retrospective Study

Objective: The objective was to study the influence of pathological factors of glomerular lesion (GL), tubulointerstitial lesion (TIL), and arteriosclerotic lesion on the blood pressure (BP) of lupus nephritis (LN). Methods: The pathological data and clinical characteristics of 69 LN patients who underwent their first renal biopsy in Chengdu Second People's Hospital from 2012 to 2018 were retrospectively analyzed. The revised 2018 ISN/RPS classification criteria of LN were used to assess the GL and TIL. The lesion index of interlobar/arcuate artery and arteriolar was calculated. Multiple linear regressions were used to analyze the effects of GL, TIL, and vascular lesion (VL) on estimated glomerular filtration rate, systolic BP (SBP), and proteinuria. Results: TIL and VL scores were different between the various grades of BP (p = 0.009, 0.019). After adjusting for gender and age, multiple linear regression showed that only TIL was linearly correlated with SBP (p = 0.022). Conclusion: After adjusting for gender and age, TIL is related to SBP and has a linear relationship with them.