id author title date pages extension mime words sentences flesch summary cache txt cord-255683-2eq24jth Chen, Weizao Cross-Reactive Human IgM-Derived Monoclonal Antibodies that Bind to HIV-1 Envelope Glycoproteins 2010-02-04 .txt text/plain 5927 290 47 Ig Ms (IgMs) are on average significantly less divergent from germline antibodies and are relevant for the development of vaccine immunogens but are underexplored compared to IgGs. Here we describe the identification and characterization of several human IgM-derived mAbs against HIV-1 which were selected from a large phage-displayed naive human antibody library constructed from blood, lymph nodes and spleens of 59 healthy donors. To find whether the activity of the antibodies is related to antibody size and how the viral infection could be affected by cross-linking of HIV-1 Envs, we generated a single-chain Fv fragment (scFv) (scFv m19) of m19 and a human IgG1 Fc-fusion protein (m19Fc) of scFv m19; m19 was selected for further characterization because its light chain was relatively less divergent from the germline ( Figure 1b) and was the only one which did not contain any somatic mutations in the CDR3 of the light chain. ./cache/cord-255683-2eq24jth.txt ./txt/cord-255683-2eq24jth.txt