Distribution of Epstein-Barr virus in systemic rheumatic disease (rheumatoid arthritis, systemic lupus erythematosus, dermatomyositis) with associated lymphadenopathy: a study of 49 cases.
ABSTRACT Among systemic rheumatic diseases (SRDs), lymphadenopathy is frequently found in patients with rheumatoid arthritis (RA) and systemic lupus erythematous (SLE). Epstein-Barr virus (EBV)-associated lymphoproliferative disorders (LPDs) may occur in patients following methotrexate therapy for RA and dermatomyositis (DM). However, little is known about the distribution of EBV in reactive LPDs in patients with SRDs who had no history of methotrexate therapy. We analyzed 49 such patients (SLE=25, RA=23, DM=1) for the presence and distribution of EBV+ cells using Epstein-Barr virus (EBV)-encoded small RNA (EBER) specific in situ hybridization. A positive signal for EBERs was identified in 9 (SLE=5, RA=4) (18%) of 49 cases, and 3 main distribution patterns of EBER+cells could be delineated: pattern A, more than 500 EBER-positive cells were located in the germinal centers as well as interfollicular area (SLE=2); pattern B, EBER + cells were located in a few germinal centers (RA=2); and pattern C, up to 100 EBER+ cells were located in the interfollicular area (SLE=3, RA=2). Recent EBV infection may be a cause of lymph node lesion in only 2 cases of patients with pattern A. However, the pathognomonic significance of pattern B and pattern C EBER + cell distribution patterns still remains unclear. Our study indicates that the underlying immune deficits of patients with SRDs may also play an important role in the development of EBV-associated LPDs in SRDs, as previously suggested by several authors.
SourceAvailable from: Illias Tazi[Show abstract] [Hide abstract]
ABSTRACT: We determined the prevalence of antibodies to Epstein-Barr virus (EBV) in 44 patients with systemic lupus erythematosus (SLE) and 44 healthy blood donors matched for sex and age as controls. Of the cases, 39 were women; mean age was 33 years. Four cases (9%) and 5 controls (11%) were positive for IgM anti-viral capsid antigen (VCA) (P = 0.9). All the cases were positive for IgG anti-VCA compared with 91% of the controls (P = 0.12). The mean immunity ratio for this antibody was 2.341 in cases and 1.873 in controls (P = 0.068). Forty (91%) cases were positive for IgG anti-EBNA1 (EB nuclear antigen1) compared with 42 (95%) controls (P = 0.6).Eastern Mediterranean health journal = La revue de santé de la Méditerranée orientale = al-Majallah al-ṣiḥḥīyah li-sharq al-mutawassiṭ 01/2009;
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ABSTRACT: AIMS: Autoimmune diseases (AD) are associated with lymphadenopathy and splenomegaly. Changes in the spleen have not been characterized completely in AD; we describe splenectomy specimens from five patients with chronic AD, highlighting the presence of necrotizing histiocytosis. METHODS AND RESULTS: Of the patients (three males and two females; mean 40 years), four had systemic lupus erythematosus; one had rheumatoid arthritis. All had moderate splenomegaly (213-803 g, mean 421 g). Four cases exhibited necrosis with apoptosis and karyorrhectic debris occurring in the white pulp and minimal acute inflammation; one showed florid follicular hyperplasia. Splenic involvement ranged from focal to extensive. Plasma cells were negative for IgG4. Haematoxylin bodies were not identified. Stains for infectious organisms were negative. Immunohistochemical studies showed that lymphocytes surrounding the necrosis were a mixture of CD4(+) and CD8(+) T cells; CD123-positive plasmacytoid dendritic cells were not present, and staining for kappa and lambda light chains showed no clonality. 16S rDNA PCR was performed; no amplification was seen in three of four cases tested for bacteria specific rDNA. Epstein-Barr virus-encoded RNA (EBER) in situ hybridization studies highlighted rare positive cells in four cases. CONCLUSIONS: Splenomegaly in AD is thought to be hyperplasic, but we present four cases showing histiocytic necrosis, a finding which should be considered part of the spectrum of AD in the spleen.Histopathology 03/2013; 63(1). DOI:10.1111/his.12143 · 3.30 Impact Factor
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ABSTRACT: We investigated the value of Epstein-Barr virus (EBV) DNA load in unfractionated whole blood for the diagnosis and prognosis of EBV-associated lymphoma. From July 2004 to July 2007, we compared EBV DNA loads in 101 patients with lymphoma and 105 control individuals. The median copy number of EBV was higher in patients with EBV-positive lymphoma (p<0.001). In patients with natural killer (NK)/T-cell lymphomas, the median EBV DNA load at presentation was significantly related to the stage (p = 0.011) and response (p = 0.026). The newly proposed classification model for NK/T cell lymphoma showed EBV DNA load differed significantly between patients with upper and extra-upper aerodigestive tracts (p = 0.017). In 16 patients with NK/T-cell lymphoma monitored serially, EBV DNA load correlated well with the treatment response and clinical course. Further prospective studies are required to evaluate the diagnosing and monitoring role of whole blood EBV DNA for uniformly treated patients.Leukemia & lymphoma 07/2009; 50(5):757-763. DOI:10.1080/10428190902803669 · 2.61 Impact Factor