In this case, necrotizing arteritis was found to be a histological feature common to both HIV-associated lupus-like GN and SLE

In this case, necrotizing arteritis was found to be a histological feature common to both HIV-associated lupus-like GN and SLE. between HIV-associated lupus-like GN and nephritis caused by lupus. Keywords:HIV, glomerulonephritis, necrotizing arteritis == Introduction == Human immunodeficiency virus (HIV)-asso-ciated lupus-like glomerulonephritis (GN) is usually a chronic immune complex disease occurring in HIV-infected patients. Although the light, immunofluorescence, and electron microscopy findings indicate features of lupus nephritis, no evidence of systemic lupus erythematosus (SLE) is usually observed in the affected patients. The pathogenesis of this condition is not completely comprehended, but it may be related to an altered immune system or the direct effect of the virus on renal tissue [1]. In this case, necrotizing arteritis was found to be a histological feature common to both HIV-associated lupus-like GN and SLE. Despite vascular lesions including necrotizing arteritis being not rarely found in SLE patients, no report of vascular lesions in patients with HIV-associated lupus-like GN has been published thus far. == Case apresentation == A 45-year-old white woman was diagnosed with HIV contamination and followed up for 10 years thereafter. She was subsequently admitted to our hospital with a 4-week history of progressive asthenia, edema of the lower limbs and face, reddish-colored urine, and weight gain of 10 kg. Laboratory tests revealed a hemoglobin level of Lexacalcitol 4.2 g/dL, white blood cell count of 15000/mm3, platelet count of 308.000/mm3, albumin level of 1.6 mg/dL, serum creatinine (SCr) level of 0.9 mg/dL, and positive direct Coombs test result. A urinalysis showed 2+ protein and a red cell count of 150-200/high-power field, and 24-hour urine collection revealed 6.10 g of protein. Assessments for detection of Treponema pallidu and hepatitis C virus were unfavorable. Hepatitis B virus screening shows serum antibodies against core protein (anti-HBC), but without surface antigen (HBsAg). The HIV viral load was 13.326 copies/mL, and Lexacalcitol the CD4-positive lymphocyte count was 148 cells/mm3. Her serum tested unfavorable for antibodies-antinuclear, anti-native DNA, anti-SM, and anti-RNP, and the C3 and C4 levels were in the normal range. A renal biopsy performed subsequently showed the presence of eight glomeruli with endocapillary and mesangial proliferation and inflammatory cell infiltration. Crescents and wire loop deposits were present in three glomeruli. Two arteries showed transmural inflammatory processes, occlusion of the vascular lumen by endothelial proliferation, and fibrin deposition (Physique 1). Immunofluorescence studies sho-wed a diffuse, coarsely granular glomerular capillary and mesangial fluorescence for IgA, IgG, IgM, C3, and C1q. Therefore, the patient was diagnosed with immune complex-mediated GN with lupus-like features. == Physique 1. == Artery with transmural fibrinoid necrosis and inflammatory infiltrate of neutrophils and lymphocytes (A: Hematoxylin and eosin; B: Massons trichrome). Glomerulus reveals striking hypercellularity with numerous neutrophils (C: Massons trichrome). Immunofluorescence for C1q shows global granular capillary wall and mesangial (D). Bar=50 m. Lexacalcitol Highly active antiretroviral therapy (HAART) -zidovudine, lamivudine, ritonavir, and atazanavir – associated with inhibitor of angiotensin converting enzyme was initiated. Three months after admission, the patient achieved complete remission of the initial symptoms and her laboratory values resumed to normal levels (SCr level, 0.71 mg/dL; urea level, 30 mg/dL; hemoglobin level, 9.4 g/dL, and 24 h proteinuria level, 349 mg). == Discussion == Abnormal kidney function is usually reported in up to 30% of HIV-infected patients [2]. The characteristic lesion of HIV-associated nephropathy (HIVAN) is usually collapsing Cd36 focal segmental glomerulosclerosis, which accounts for over 60% of the HIVAN cases [3]. However, the occurrence of immune complex-mediated forms of GN is being increasingly reported [1,4]. The relationship between HIV contamination and GN is currently unclear. HIV infection is related to polyclonal hypergammaglobulinemia, which can foment the circulating immune complexes [1]. Some renal lesions that seen in patients with HIV contamination may be associated with the presence of another contamination (such as hepatitis C virus), but this was not the case in our patient. One form of GN that has been described in HIV-infected population is the immune complex GN with lupus-like histologic features, which is usually defined by the presence of full house glomerular immunoglobulin and complement deposits (IgG, IgA, IgM, C3, and C1q) without clinical findings or serologic markers of SLE. Light microscopy has previously revealed a broad spectrum of findings characterized by diffuse.