Abstract
The Luciferase Immuno Precipitation System (LIPS) enables the detection of specific serum antibodies by immunoprecipitation of recombinant antigens tagged with a luciferase reporter. Here we describe LIPS assays for the quantification of autoantibodies to the H+, K+-ATPase A (ATP4A) and B (ATP4B) subunits, two serological markers of autoimmune atrophic gastritis and pernicious anemia. In particular, we will describe the expression of luciferase-tagged recombinant ATP4A and ATP4B, their immunoprecipitation with test sera, the recovery and washing of immune-complexes with a protein-A coated resin, and the quantification of autoantibodies by addition of a luciferase substrate and the measurement of the light output from captured luciferase-tagged antigens.
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Acknowledgments
E.L. and B.A. acknowledge support from University Sapienza 2013–2014. H.W.D. and J.M.W. acknowledge support from NIH grant R01 DK052068 (to H.W.D.). I.M., C.B., L.P., and V.L. acknowledge that their work was carried out within the framework of the “Ivascomar project, Cluster Tecnologico Nazionale Scienze della Vita ALISEI, Italian Ministry of Research” and with the support of the Associazione Italiana per la Ricerca sul Cancro (AIRC, bando 5 × 1000 N_12182). The authors wish to thank Carlo Lombardoni for his help in drawing Fig. 1.
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Lahner, E. et al. (2019). Measurement of Autoantibodies to Gastric H+,K+-ATPase (ATP4A/B) Using a Luciferase Immunoprecipitation System (LIPS). In: Houen, G. (eds) Autoantibodies. Methods in Molecular Biology, vol 1901. Humana Press, New York, NY. https://doi.org/10.1007/978-1-4939-8949-2_10
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DOI: https://doi.org/10.1007/978-1-4939-8949-2_10
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