Effects of Epstein-Barr Virus Infection on CD19+ B Lymphocytes in Patients with Immunorelated Pancytopenia.

<bold>Objectives: </bold>To explore effects of Epstein-Barr virus (EBV) infection on CD19+ B lymphocytes in patients with immunorelated pancytopenia (IRP).<bold>Methods: </bold>An enzyme-linked immunosorbent assay (ELISA) in vitro diagnostic kit was used to detect EBV capsid antigen- (CA-) IgG and VCA-IgM antibodies in the serum. We analyzed the EBV-DNA copies of CD19+ B lymphocyte by using real-time quantitative polymerase chain reaction (RT-qPCR). CD21, CD23, CD5, CD80, and CD86 receptors on the surfaces of CD19+ B cells were detected by flow cytometry (FCM). The correlation between these receptors and EBV-DNA copies were evaluated.<bold>Results: </bold>The results revealed that the positive rate of EBVCA-IgM and CD19+ B lymphocyte EBV-DNA copy in the IRP group were significantly higher than those in the control group (P < 0.05). CD19+ B lymphocyte EBV-DNA copies were also more abundant in IRP patients than in control subjects (P < 0.05). CD19+ B lymphocyte EBV-DNA copies were also more abundant in IRP patients than in control subjects (P < 0.05). CD19+ B lymphocyte EBV-DNA copies were also more abundant in IRP patients than in control subjects (.<bold>Conclusions: </bold>EBV infection may activate CD19+ B lymphocytes and further disrupt bone marrow hematopoiesis in IRP patients. [ABSTRACT FROM AUTHOR]