The luciferase immunoprecipitation system (LIPS) assay is a liquid phase immunoassay allowing high-throughput serological screening of antigen-specific antibodies. The immunoassay involves quantitating serum antibodies by measuring luminescence emitted by the reporter enzyme Renilla luciferase (Rluc) fused to an antigen of interest. The Rluc-antigen fusion protein is recognized by antigen-specific antibodies, and antigen-antibody complexes are captured by protein A/G beads that recognize the Fc region of the IgG antibody (1).

In a recent publication (2), this assay was used to assess the presence of autoantibodies against ATP4A and ATP4B subunits of parietal cells H⁺, K⁺-ATPase in patients with atrophic body gastritis and in controls. Continue reading “Luciferase Immunoprecipitation System Assay (LIPS): Expression of Luciferase Antigen using TNT Transcription/Translation Kit”