Lupus & antiphospholipid syndrome

Tubulointerstitial inflammation driving interstitial fibrosis and tubular atrophy predicts poor renal outcome in refractory lupus nephritis

Rheumatology (Oxford)Published Retrospective cohort study

Authors' conclusion

TII predicts the development of IF/TA in LN and independently from glomerulosclerosis is associated with progression to ESKD.

Study context

Population
Lupus nephritis (LN) patients with ≥2 biopsies from 1994 to 2018; 84% female, age 25 (+/−12) years at diagnosis; 90% class III or IV proliferative LN with or without class V on initial biopsymedian follow-up 11 (6–16) years
Participants
104 patients
Outcome
ESKD and progression of IF/TA
Methodological detailsrepeat kidney biopsies, multiplex immunohistochemistry
  • Repeat kidney biopsies
  • Multiplex immunohistochemistry

Main finding

As reported in the abstract

Patients developing end-stage kidney disease (ESKD)

47

Persistent tubulointerstitial inflammation (TII) ≥ 25% in the absence of chronicity, only histological predictor of ESKD: OR

4.13 (1.06, 16.06) (95% CI)

Observational data: associations, not effects.

Further findings

TII composition (multiplex immunohistochemistry)

TII occurred as CD8 T cell-mediated tubulitis or as organized T and B cell rich infiltrates reminiscent of tertiary lymphoid structures

Original publication

Tubulointerstitial inflammation driving interstitial fibrosis and tubular atrophy predicts poor renal outcome in refractory lupus nephritis. Rheumatology (Oxford). Published 10 October 2025. doi:10.1093/rheumatology/keaf530

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