title: [[Virus-like particle-based immunoglobulin M capture enzyme-linked immunosorbent assay for the detection of IgM antibodies against Chikungunya virus].
abstract: To establish a MacELISA method for the detection of IgM antibodies against Chikungunya virus (CHIKV), we prepared virus like particle (VLP) antigens of CHIKV using the whole structural protein C-E3-E2-6K-E1 encoding gene with a baculovirus expression system in Sf9 insect cells. The VLPs were purified and used to immunize Kunming mice. Then, polyclonal antibodies were purified from the samples of ascites with a protein G HiTrap SP column and labeled with horseradish peroxidase. A MacELISA method for the detection of IgM antibodies against CHIKV was assembled with goat anti-human IgM antibody, VLP antigens and an enzyme-labeled polyclonal antibody. The results were evaluated with a serum panel containing serum samples from laboratory-confirmed CHIK, HFRS patients, healthy donors, and commercially available CHIKV IgM as a quality control. It was shown that the MacELISA had a specificity of 99% (99/100), the coefficients of variation (CoV) within a plate were <10%, and the CoV of different ELISA plates in terms of the plate variation coefficient was <15%. A comparative analysis was performed to compare the current method against a commercial CHIKV IgM antibody detection kit for IIFA-IgM. The detection limit of MacELISA was significantly lower than that of the IIFA-IgM commercial kit (P< 0.0001). Here, we demonstrate that the VLP-based MacELISA is a promising tool for the early diagnosis and epidemiological investigation of CHIKV infection, with a high level of sensitivity and specificity for the detection of IgM antibodies against CHIKV.
authors: Jian-dong
authors: JD
authors: Li
authors: Quan-fu
authors: QF
authors: Zhang
authors: Shuo
authors: S
authors: Zhang
authors: Chuan
authors: C
authors: Li
authors: Qin-zhi
authors: QZ
authors: Liu
authors: Mi-fang
authors: MF
authors: Liang
authors: De-xin
authors: DX
authors: Li
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000097:blood*; D065632:Chikungunya Fever / Q000097:blood / Q000175:diagnosis* / Q000821:virology; D002646:Chikungunya virus / Q000276:immunology* / Q000302:isolation & purification; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods*; D006801:Humans; D007075:Immunoglobulin M / Q000097:blood*; D051379:Mice
chemical_list: D000914:Antibodies, Viral; D007075:Immunoglobulin M