Two Broad Categories Overlapping With Rheumatoid Arthritis Observed in Synovial Biopsies from Patients With Juvenile Idiopathic Arthritis.

Objective: The objective is to characterize transcriptomic profiles and immune cell composition and distribution in juvenile idiopathic arthritis (JIA) synovial biopsies, assess for associations of these features with clinical parameters, and compare JIA and rheumatoid arthritis (RA) synovial features.

Methods: RNA sequencing (RNASeq) was performed on 24 samples, with pathway analysis and inference of relative abundance of immune cell subsets based on gene expression data. Two multiplex fluorescence immunohistochemistry (IHC) panels were performed on 28 samples (including 13 on which RNASeq was performed), staining for CD206 classical and CD206 nonclassical macrophages, and CD8 and CD4 T and B lymphocytes.

p16, a marker of cellular senescence, is associated with renal disease in the B6. mouse model of lupus.

Objectives: Despite treatment, one-third of patients with lupus nephritis (LN) show a decline in renal function. Prognostic markers of poor outcome as well as novel therapeutic targets are therefore highly sought. We showed that p16, a marker of cellular senescence, is observed in baseline kidney biopsies from patients with LN, and is associated with renal disease.

Onset of IgA nephropathy in a patient treated with infliximab for ankylosing spondylitis.

We report the case of a 43-year-old man, suffering from ankylosing spondylitis and treated with Infliximab 5 mg/kg every 2 months, with an excellent disease control. During a follow-up consultation, an incipient renal insufficiency is detected. A urine analysis showed haematuria and proteinuria and a renal puncture-biopsy revealed an image of IgA nephropathy.