Jianhui Nie

Learn More
Glycans on the human immunodeficiency virus (HIV) envelope glycoprotein (Env) play an important role in viral infection and evasion of neutralization by antibodies. In this study, all 25 potential N-linked glycosylation sites (PNGS) on the HIV-1 CRF07_BC Env, FE, were mutated individually to study the effect of their removal on viral infectivity, virion(More)
To determine whether genetic variability influences the ability to detect antibody, nine gp41 ectodomain recombinant proteins from human immunodeficiency virus type 1 (HIV-1) CRF07_BC, CRF01_AE and subtype B' were expressed in a bacterial expression system and purified. An indirect sandwich ELISA was developed with individual purified recombinant proteins.(More)
BACKGROUND Pre-existing immunity to Vaccinia Tian Tan virus (VTT) resulting from a large vaccination campaign against smallpox prior to the early 1980s in China, has been a major issue for application of VTT-vector based vaccines. It is essential to establish a sensitive and high-throughput neutralization assay to understand the epidemiology of(More)
BACKGROUND The vaccinia virus Guang9 strain (VG9), derived from the vaccinia virus Tian Tan strain (VTT) has been found to be less virulent than VTT. METHODOLOGY/PRINCIPAL FINDINGS To investigate whether VG9 could be a potential replicating virus vector, the TK genes in VG9 and VTT were replaced with the HIV-1 envelope gene via homologous recombination,(More)
BACKGROUND Although Enfuvirtide (T20) has not been used in China, investigating the natural occurrence of primary resistance mutations in the HR1 region of the gp41 sequence from T20 naïve patients would help in determining treatment strategies for AIDS patients. OBJECTIVES To investigate natural mutations in the HR1 region of the gp41 sequence in China(More)
BACKGROUND The presence of various levels of Adenovirus serotype 5 neutralizing antibodies (Ad5NAb) is thought to contribute to the inconsistent clinical results obtained from vaccination and gene therapy studies. Currently, two platforms based on high-throughput technology are available for Ad5NAb quantification, chemiluminescence- and fluorescence-based(More)
BACKGROUND As HIV vaccines move into preclinical and clinical trials in China, pseudovirion-based neutralization assays, especially those using env genes of Chinese origin, are widely required to evaluate the ability of HIV vaccines to induce neutralizing antibody (nAb) responses. MATERIALS AND METHODS Functional gp160 genes from plasma samples from(More)
BACKGROUND Although a great number of HIV-1 pseudoviruses have been generated for neutralization assays, circulating recombinant forms, such as CRF01_AE, are not included. Given the increasing prevalence of CRF01_AE, the establishment of a pool of CRF01_AE env isolates for the evaluation of potential HIV vaccines is needed. MATERIALS AND METHODS(More)
Subtype C is the most prevalent HIV-1 subtype globally and a common circulating recombinant form virus, CRF_BC, is predominant in China. It is unclear whether subtype C-based vaccines are capable of neutralizing CRF_BC viruses or can be evaluated using a neutralization assay based on CRF_BC pseudoviruses. Phylogenetic analysis of full-length gp160(More)
The CD4 binding site (CD4bs) of envelope glycoprotein (Env) is an important conserved target for anti-human immunodeficiency virus type 1 (HIV-1) neutralizing antibodies. Neutralizing monoclonal antibodies IgG1 b12 (b12) could recognize conformational epitopes that overlap the CD4bs of Env. Different virus strains, even derived from the same individual,(More)