Anti-HEV Monoclonal antibody, Clone S-25

Aim Hepatitis E virus (HEV) can cause chronic infection in immunocompromised hosts. However, the dynamics of HEV during persistent infection is not well understood. To elucidate time course alterations in virus sequences and anti-HEV antibodies during persistent infection, we analyzed the HEV sequences and titers of anti-HEV antibodies from a chronic hepatitis E patient. Methods Serum samples were obtained from a chronic hepatitis E patient under corticosteroid therapy for neurological disease. The titers of anti-HEV antibodies (immunoglobulin A, immunoglobulin M, and immunoglobulin G) in serum samples were detected by enzyme immunoassay. The full or near-full nucleotide sequences of HEV isolated from consecutive serum samples were identified and compared. Phylogenetic analysis was also performed. Results Alterations of anti-HEV antibodies from a chronic hepatitis E patient were different from those previously reported in acute hepatitis E patients. The virus sequence was unchanged in the period without treatment, but nucleotide mutations were observed after ribavirin treatment was started. In addition, the sequence of this strain had extremely high identity to that isolated from swine liver in Japan. Conclusions Virus mutations in HEV emerged after ribavirin treatment was started. Sequence analysis may useful for deciding the treatment strategy for chronic hepatitis E patients who did not eliminate the virus with 3 months of RBV treatment and inferring the origin of the infection. This report provides insights into the chronicity of hepatitis E, and the impact of persistent infection and ribavirin treatment on the emergence of virus mutations.

Reducing the fuel consumption and the pollutant emissions becomes more and more demanding, hence, in recent years, hybridization started to play an important part in the automotive industry. While both hybrid and pure electric vehicles represent viable solutions for modern vehicle applications, hybrid electric vehicles (HEV) removes the dis-advantage of using a single source of energy. The aim of this paper is to investigate the energetic performance of a parallel HEV in different test cycles, such as Worldwide Harmonized Light Vehicles Test Cycle (WLTC), considering multiple levels of hybridization. The study is done using complex models developed in a performant simulation environment. The energetic performances are being compared in different cycles by analyzing the FCR (fuel consumption ratio) using three different values for the hybridization factor (HF). A comparison of the test cycles is being realized using FCR parameter, also an analysis of the correlation between FCR and VSF (vehicle speed fluctuation) is done. The simulation results obtained for the current application are compared with the ones obtained for a conventional vehicle as well as considering an electric vehicle.