ABSTRACT
Immune deficiency of the host caused by allogeneic hematopoietic stem cell transplantation (allo-HSCT) is the initial factor of reactivation of latent human cytomegalovirus (HCMV). The risk factors of reactivation of HCMV in allo-HSCT recipients consist of the serological status of HCMV in donors and recipients, the matching degree of human leukocyte antigen (HLA) and pretreatment patterns, etc. The reactivation of HCMV is associated with the expression of a series of viral cleavage and proliferation proteins induced by the overexpression of major immediate early promoter/enhancer (MIEP) in the viral genome. In this article, the risk factors of reactivation of HCMV after allo-HSCT, the molecular changes related to maintaining latent infection of HCMV, the key role of MIEP overexpression in reactivation of HCMV, and the molecular pathways involved in reactivation of HCMV after allo-HSCT were reviewed and the major molecular events of reactivation of HCMV after allo-HSCT were elucidated, aiming to provide reference for the prevention and treatment of cytomegaloviral disease (CMVD) after allo-HSCT.
ABSTRACT
Objective To investigate the potential role of human cytomegalovirus lower matrix phosphoprotein 65 (HCMV pp65) in murine systemic lupus erythematosus (SLE).Methods The prokaryotic vector pET-28b and eukaryotic vector pcDNA 3.0 were constructed to express the HCMV pp65 protein.All the C57BL/6 mice were inoculated with pp65 eukaryotic vector intramuscularly five times at 2-week intervals and then were bled via the retro-orbital vein.Subsequently,indirect ELISA was used to evaluate the concentration of anti-pp65 IgG,anti-dsDNA and ANA.At the same time,IL-1 b,IL-6,and TNF-α were determined by competitive ELISA.Results The early onset of autoantibodies and an overexpression of IL-6 were observed in immunized male C57BL/6 mice.Conclusion HCMV pp65 triggers the deregulation of humoral immunity in C57BL/6 mice,which indicates that the immune responses induced by HCMV pp65 may be involved in the development of SLE.
ABSTRACT
Human cytomegalovirus (HCMV) is the most common cause of congenital infection, resulting in birth defects such as microcephaly. In this study, RT-PCR and Western Blotting were performed to quantify the regulation of endogenic nerve growth factor expression in neuroglia cells by HCMV infection. The results showed that basal, endogenous NGF expression in U251 was unchanged during early HCMV infection. NGF expression is strongly down-regulated during the latent phase of infection. These results suggest that HCMV can depress the NGF expression in U251 cells.
ABSTRACT
@# ObjectiveTo study the relationship between Human Cytomegalovirus (HCMV) infection and endothelial function disorder and its possible role in nonspecific low back pain (NLBP).MethodsHCMV-DNA, -IgM, -IgG, HE stain, endothelin (ET) were detected in 50 patients with NLBP and 36 healthy people without NLBP(non-NLBP group).ResultsThe positive rate of HCMV-DNA,-IgM,-IgG, HE stain were higher in NLBP group than that in non-NLBP group(P<0.05), as well as the levels of ET(P<0.05).ConclusionHCMV infection may relate with NLBP, and ET may play an important role in it.
ABSTRACT
The human cytomegalovirus(HCMV) gene encoding the protein reactive with the sera of HCMV-infected patient was cloned and characterized. A reactive phage clone was screened from a lambda gt11 expression library of cDNA of HCMV AD169 strain using HCMV-infected patient sera. The recombinant protein was expressed as 138 kDa-fusion protein with beta-galactosidase, which was reactive with IgM or IgG HCMV antibody-positive sera, but not with anti-HCMV antibody-negative sera. A homology search of the DNA sequence of the cloned gene with HCMV AD169 sequences revealed that it was composed of 709 base pairs spanning between 0.174 and 0.177 map units of the UL32 region of the HCMV AD169 strain genome. This position corresponded to a part of the gene encoding 150 kDa phosphoprotein-(pp150), a major tegument protein, which was reported as an immunogenic protein which evoked strong and longstanding antibody response and had no sequence homology with the proteins of other herpesviruses. These results suggested that pp150 was an immunogenic protein in natural HCMV infection and therefore this clone was regarded as a useful candidate for developing an antigen for the serodiagnosis of HCMV.
Subject(s)
Humans , Antibodies, Viral/blood , Antigens, Viral/genetics , Cloning, Molecular , Cytomegalovirus/genetics , Cytomegalovirus Infections/blood , DNA, Complementary/genetics , DNA, Viral/genetics , Gene Library , Genes, Viral , Recombinant Fusion Proteins/biosynthesis , Sequence Homology, Nucleic Acid , Viral Matrix Proteins/geneticsABSTRACT
Human cytomegalovirus (HCMV) is a DNA virus and serious opportunistic pathogen for both newborn and immunocompromised individuals.To research technique for gene silence and antiviral agents, ribozyme M1GS-T6 was constructed from external guide sequences(EGSs)that consist of a sequence complementary to HCMV UL54 gene RNA and M1 RNA, the catalytic RNA subunit of RNase P from Escherichia coli. The results showed that M1GS can efficiently cleave the mRNA sequence encoding UL54 protein in vitro.
ABSTRACT
Objective To observe the effects of methylene blue photochemical(MB-P) inactivation of human cytomegalovirus in blood products.Methods Plasma and red blood cell suspensions containing 10% HCMV and 5?mol/L MB were illuminated by fluorescent light of 38000 Lux for 1 hour, HCMV was used as model viruses for validation of virus inactivation.Results The 50% tissue culture infective dose (TCID_ 50 ) contained in plasma and red blood cell suspensions decreased by 4~6 times.Conclusion MB-P treatment is effective in inactivating the infectivity of HCMV in plasma and red blood cell suspension.
ABSTRACT
Aim To investigate the effect of Shuanghuanglian on the the load of hepatic HCMV DNA in mice infected with HCMV.Method The model of mice hepatitis infected with HCMV was prepared. 10 days after treated with Shuanghuanlian,the hepatic HCMV DNA was detected qualitatively by polymerase chain reaction;the level of alanine aminotransferase (ALT) and aspartate aminotransferase(AST) in serum were assayed by spectrophotometer;and hepatic pathology was observed with HE staining.Results HCMV DNA load in infected model group was 3875.4760 copies/mg,while in high and middling dosage shuanghuanglian therapy group it was 8.3261 copies/mg、9.1476 copies/mg respectively;It decreased significantly compared with the former(P0.05);low dosage of shuanghuanglian(HCMV DNA load was 3812.8980 copies/mg) had no notable difference compared with infected model group;serum transaminase (ALT,AST) levels significantly elevated in infected model group; serum transaminase level decreased sharply and liver histological pathology was lighten after treated with high and middling dosage of Shuanghuanglian(P