title: Investigation of interaction between two neutralizing monoclonal antibodies and SARS virus using biosensor based on imaging ellipsometry.
abstract: Two neutralizing human scFv, b1 and h12 were identified initially using ELISA,employing highly purified virus as the coating antigen. The biosensor technique based on imaging ellipsometry was employed directly to detect two neutralizing monoclonal antibodies and serial serum samples from 10 SARS patients and 12 volunteers who had not SARS. Further, the kinetic process of interaction between the antibodies and SARS-CoV was studied using the real-time function of the biosensor. The biosensor is consistent with ELISA that the antibody h12 showed a higher affinity in encountering the virus than antibody b1. The affinity of antibody b1 and antibody h12 was 9.5 x 10(6) M(-1) and 1.36 x 10(7) M(- 1), respectively. As a label free method, the biosensor based on imaging ellipsometry proved to be a more competent mechanism for measuring serum samples from SARS patients and the affinity between these antibodies and the SARS coronavirus.
authors.affiliation: Institute of Mechanics, Chinese Academy of Sciences, #15, Bei-si-huan West Road, Beijing 100080, China.
authors.forename: Cai
authors.initials: C
authors.lastname: Qi
authors.forename: Jin-Zhu
authors.initials: JZ
authors.lastname: Duan
authors.forename: Zhan-Hui
authors.initials: ZH
authors.lastname: Wang
authors.forename: Yan-Yan
authors.initials: YY
authors.lastname: Chen
authors.forename: Pan-He
authors.initials: PH
authors.lastname: Zhang
authors.forename: Lin
authors.initials: L
authors.lastname: Zhan
authors.forename: Xi-Yun
authors.initials: XY
authors.lastname: Yan
authors.forename: Wu-Chun
authors.initials: WC
authors.lastname: Cao
authors.forename: Gang
authors.initials: G
authors.lastname: Jin
mesh_terms: D000911:Antibodies, Monoclonal / Q000737:chemistry*; D000914:Antibodies, Viral / Q000737:chemistry*; D015374:Biosensing Techniques; D003952:Diagnostic Imaging / Q000295:instrumentation / Q000379:methods; D006801:Humans; D045473:Severe acute respiratory syndrome-related coronavirus / Q000737:chemistry*
chemical_list: D000911:Antibodies, Monoclonal; D000914:Antibodies, Viral