alpha-Mannosidase I Protein Expression in Peripheral Blood Mononuclear Cells Is Upregulated During Hepatitis B Virus Infection
VIRAL IMMUNOLOGY
Authors: Jiang, Libin; Hu, Song; Tian, Deying; Zou, Xiaojing; He, Man
Abstract
Hepatitis B virus (HBV) has been reported to be recognized by dendritic cell-specific ICAM-3-grabbing nonintegrin in the presence of the -mannosidase I inhibitor kifunensine, whereas native HBV is not. The aim of our study was to determine whether changes in -mannosidase I expression in peripheral blood mononuclear cells (PBMCs) occur in patients with HBV infection. Peripheral blood was collected from 90 HBV-infected patients (grouped into immune tolerance, chronic hepatitis B, or inactive carrier group based on their clinical states) and 30 healthy donors. Expression of the three -mannosidase I subtypes, MAN1A1, MAN1A2, and MAN1C1, was measured using western blot analyses. Compared with the healthy controls, significant increases in the MAN1A1, MAN1A2, and MAN1C1 expression levels were observed in the three HBV-infected groups, among whom the immune tolerance group showed the largest increase. For the patients in the immune tolerance phase, the expression levels of both MAN1A1 and MAN1A2 were linearly and positively correlated with the hepatitis B e antigen (HBeAg) titer and HBV DNA level, although a positive correlation was only found between MAN1C1 expression and the HBeAg titer. These results indicate that increased -mannosidase I expression in PBMCs may play an important role in HBV immune escape and that its expression level is closely related to viral replication activity.
Overlapped differentially expressed genes between acute lymphoblastic leukemia and chronic lymphocytic leukemia revealed potential key genes and pathways involved in leukemia
JOURNAL OF CELLULAR BIOCHEMISTRY
Authors: Zhang, Suwei; Zhang, Qiaoxin; Yin, Jun; Wu, Xianheng
Abstract
Common differentially expressed genes (DEGs) in acute lymphoblastic leukemia (ALL) and chronic lymphocytic leukemia (CLL) might play critical roles in the pathogenesis and process of leukemia. We collected RNA sequencing (RNA-seq) data of human CLL, ALL samples, and normal peripheral blood CD19+ B cells as well as thymus samples, and analyzed similarities and differences between their transcriptomes using Cuffdiff2, DESeq, and edgeR. Compared with the RNA-seq data of normal peripheral blood CD19+ B cells and thymus samples, there were a large number of DEGs in ALL and CLL. DEGs in ALL and CLL not only have their distinguished features but also have a similar pattern. To figure out the common DEGs between CLL and ALL, we further identified 26 overlapped genes between CLL and ALL, among which 10 genes showed similar expression variation profiles whereas 16 genes showed opposite variation. The expression levels of 10 genes (SCML4, TNF-alpha, CD1C, FGFR1, MYO7B, DUSP1, PAP1GAP, MAN1C1, SLFN5, and CD8A) among the 26 genes were further confirmed by experiments, which was consistent with the results obtained by analyzing the RNA-seq data. The current study contributes to better understanding the pathophysiology of leukemia and unearthing novel potential prognostic markers and therapeutic targets of leukemia.