Summary The objective of the study was to investigate the role of endothelin-1 in the pathogenesis of scleroderma renal crisis in patients with systemic sclerosis. We used immunohistochemical ...analysis with anti–endothelin-1 and anti–von Willebrand factor antibodies in comparing kidney biopsies from patients with systemic sclerosis and scleroderma renal crisis (n = 14); from normal kidneys (n = 5); and from patients with typical hemolytic uremic syndrome and thrombotic microangiopathy (n = 5), antiphospholipid syndrome (n = 6), diabetic nephropathy (n = 5), minimal change disease with cyclosporine toxicity (n = 5), or nephroangiosclerosis (n = 5). Kidney biopsies from all systemic sclerosis patients presented specific lesions: glomerular lesions with thickened capillary walls (n = 6, 42.8%), mesangiolysis (n = 3, 21.4%), fibrin thrombi (n = 3, 21.4%), hypertrophy of juxtaglomerular apparatus (n = 5, 35.7%), arteriolar lesions showing mucinous intimal thickening and lumen mucoid occlusions (n = 13, 92.8%), proliferation of intimal cells (ie, “onion-skin” lesions; n = 13, 92.8%), fibrinoid necrosis (n = 3, 21.4%), and fibrin thrombosis (n = 4, 28.6%). Chronic lesions in large arteries showed modifications such as fibrous intimal thickening (n = 13, 92.8%). The pattern of endothelial staining for endothelin-1 in both glomeruli and arteriolar lesions appears to be specific for scleroderma renal crisis. Glomerular endothelin-1 staining without arteriolar staining was seen in hemolytic uremic syndrome; and isolated arteriolar staining (without glomerular staining) was seen in a number of conditions including antiphospholipid nephropathy, cyclosporine toxicity, and diabetic nephropathy. Endothelin-1 is overexpressed in glomeruli and arterioles of patients with scleroderma renal crisis, which suggests that endothelin-1 might be a therapeutic target in this condition.
Abstract Objectives Ischemic digital ulcers (DU) represent a major complication of systemic sclerosis (SSc). We investigated the impact of controlling the ulcerative disease on disability, pain, and ...quality of life in SSc patients receiving bosentan. Methods ECLIPSE (Study AC-052-517) is a 2-year prospective, multicenter, and observational study. Patients with SSc who experienced at least 1 DU in the previous year and received bosentan were included between October 2009 and March 2011. Disability scores Cochin Hand Function Scale (CHFS) and Health Assessment Questionnaire Disability Index (HAQ-DI), pain scores (visual analog scale), and quality-of-life scores (SF-36) were collected at inclusion and 1 year later (primary endpoint). A controlled ulcerative disease was defined by the absence of ongoing/new DU episode between inclusion and 1-year follow-up. Results Data were available at 1 year for 120 patients out of 190 included. During follow-up, 46 (38.3%) patients experienced a new DU episode. The number of DU per patient decreased from 1.4 ± 1.8 at inclusion to 0.6 ± 1.6 ( p < 0.0001) at 1 year. Disability scores decreased from 1.0 ± 0.7 to 0.9 ± 0.7 ( p = 0.04) for the HAQ-DI and from 29 ± 20 to 25 ± 20 ( p = 0.005) for the CHFS; the pain score decreased from 4.3 ± 3.1 to 2.9 ± 2.8 ( p < 0.0001). This improvement was attributed to patients with a controlled ulcerative disease (48.3%), who significantly improved HAQ-DI ( p = 0.04), CHFS ( p = 0.04), and pain score ( p = 0.046). Conclusions In patients with SSc, control of the ulcerative disease for 1 year was associated with significant attenuation of hand disability.
Objectives To report a patient with systemic ANCA-associated vasculitis, under maintenance treatment, who had persistent microscopic hematuria and developed recurrent pelvic pain due to ...Corynebacterium urealyticum encrusting cystitis. The relevant literature on this infection is reviewed. Methods Descriptive case report and a review of the literature (PubMed search). Results A 39-year-old woman on maintenance therapy for systemic ANCA-associated vasculitis, diagnosed 10 months earlier and with persistent microscopic hematuria, developed recurrent pelvic pain. She had received several immunosuppressants (including cyclophosphamide and rituximab) since the onset of her vasculitis, as well as cycles of broad-spectrum antibiotics during the acute initial phase of her disease. Computerized tomography of the pelvis and cystoscopy showed several encrusted calcifications in the bladder mucosa, and, finally, urine culture (selective media) led to the diagnosis of C. urealyticum infection. Most of the bladder-encrusted stones were removed during cystoscopy and daily intramuscular teicoplanin injections were given for 14 days. Her symptoms disappeared rapidly and completely. On reviewing the literature, immunosuppression, previous broad-spectrum antibiotics, urogenital alkaline pH, and prolonged bladder catheterization are predisposing factors for this rare infection. C. urealyticum encrusting cystitis has been reported in patients with systemic diseases but not yet in ANCA-associated vasculitis. Outcome is almost always good under adequate antibiotic therapy, mainly glycopeptides. Conclusion Physicians should be aware of this unusual but potentially emerging infectious complication that can be challenging in ANCA-associated vasculitis, because the urinary tract can be affected by the vasculitis or as a complication of previous cyclophosphamide therapy.
Background Pulmonary hypertension (PH) complicating systemic sclerosis (SSc)-related interstitial lung disease (ILD) is usually associated with a poor prognosis. However, data are either lacking or ...scarce on prognostic factors in this condition. The objectives of this study were to compare the survival of patients with ILD-associated PH (PH-ILD) or pulmonary arterial hypertension (PAH) and to determine whether the severity of PH has prognostic value in SSc-associated PH-ILD. Methods Consecutive patients with SSc and PH-ILD (n = 47) or PAH (n = 50) confirmed by right-sided heart catheterization were included in a cross-sectional analysis. PH was classified as mild (mean pulmonary arterial pressure mPAP ≤ 35 mm Hg) or moderate to severe (mPAP > 35 mm Hg). Results As compared with patients with PAH, subjects with PH-ILD were younger, were more frequently men with a history of smoking, had more frequently diffuse SSc, less frequently anticentromere antibodies, and a lower FVC/diffusing capacity of lung for carbon monoxide (D lco) ratio. They had a worse prognosis than patients with PAH (3-year survival of 47% vs 71%, respectively; P = .07). Patients with mild PH-ILD had similar poor outcomes when compared with those with moderate to severe PH-ILD. Pericardial effusion (hazard ratio HR, 2.44; P = .04) and lower D lco (HR, 0.96; P = .01) were the only independent factors predictive of a poor survival in the PH-ILD group. Conclusions Patients with SSc with PH-ILD had a different phenotype and a worse prognosis than those with SSc and PAH. Lower D lco and presence of pericardial effusion were predictive of a poor outcome in PH-ILD, whereas mPAP seemed to have no prognostic significance.
