PMID- 37268197 OWN - NLM STAT- MEDLINE DCOM- 20230621 LR - 20230621 IS - 1096-0309 (Electronic) IS - 0003-2697 (Linking) VI - 674 DP - 2023 Aug 1 TI - Step-by-step full factorial design to optimize a quantitative sandwich ELISA. PG - 115195 LID - S0003-2697(23)00160-4 [pii] LID - 10.1016/j.ab.2023.115195 [doi] AB - In this work, a quantitative sandwich ELISA was optimized, through a full factorial design of experiments (DOE) in successive steps of a preliminary protocol obtained by the method of one factor at a time (OFAT). The specificity of the optimized ELISA, the lower limit of quantification, the quantification range and the analytical sensitivity of the antigen quantification curve were evaluated, in comparison with the curve obtained from the preliminary protocol. The full factorial DOE was linked to a simple statistical processing, which facilitates the interpretation of the results in those laboratories where there is no trained statistician. The step-by-step optimization of the ELISA and the successive incorporation into the protocol of the best combination of factors and levels, allowed obtaining a specific immunoassay, with an analytical sensitivity 20 times greater and with a lower limit of antigen quantification that decreased from 156.25 at 9.766 ng/mL. As far as we know, there are no reports of optimization of an ELISA following the step-by-step scheme used in this work. The optimized ELISA will be used for the quantification of the TT-P0 protein, the active principle of a vaccine candidate against sea lice. CI - Copyright (c) 2023 Elsevier Inc. All rights reserved. FAU - Hernandez, Carlos A AU - Hernandez CA AD - Center for Genetic Engineering and Biotechnology of Sancti Spiritus, Circunvalante Norte, Olivos III, Sancti Spiritus, Cuba. FAU - Perez-Bernal, Maylin AU - Perez-Bernal M AD - Center for Genetic Engineering and Biotechnology of Sancti Spiritus, Circunvalante Norte, Olivos III, Sancti Spiritus, Cuba. Electronic address: maylin.perez@cigb.edu.cu. FAU - Abreu, Daymi AU - Abreu D AD - Center for Genetic Engineering and Biotechnology of Sancti Spiritus, Circunvalante Norte, Olivos III, Sancti Spiritus, Cuba. FAU - Valdivia, Onel AU - Valdivia O AD - Center for Genetic Engineering and Biotechnology of Sancti Spiritus, Circunvalante Norte, Olivos III, Sancti Spiritus, Cuba. FAU - Delgado, Magali AU - Delgado M AD - Center for Genetic Engineering and Biotechnology of Sancti Spiritus, Circunvalante Norte, Olivos III, Sancti Spiritus, Cuba. FAU - Dorta, Dayami AU - Dorta D AD - Center for Genetic Engineering and Biotechnology of Sancti Spiritus, Circunvalante Norte, Olivos III, Sancti Spiritus, Cuba. FAU - Dominguez, Andy G AU - Dominguez AG AD - Center for Genetic Engineering and Biotechnology of Sancti Spiritus, Circunvalante Norte, Olivos III, Sancti Spiritus, Cuba. FAU - Perez, Enrique R AU - Perez ER AD - Center for Genetic Engineering and Biotechnology of Sancti Spiritus, Circunvalante Norte, Olivos III, Sancti Spiritus, Cuba. FAU - Sanchez-Rios, Jose M AU - Sanchez-Rios JM AD - Center for Genetic Engineering and Biotechnology of Sancti Spiritus, Circunvalante Norte, Olivos III, Sancti Spiritus, Cuba. LA - eng PT - Journal Article DEP - 20230601 PL - United States TA - Anal Biochem JT - Analytical biochemistry JID - 0370535 RN - 0 (Antigens) SB - IM MH - Enzyme-Linked Immunosorbent Assay/methods MH - Immunoassay MH - *Antigens OTO - NOTNLM OT - ELISA OT - Effect size OT - Full factorial design OT - Optimization COIS- Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. EDAT- 2023/06/03 11:42 MHDA- 2023/06/21 06:42 CRDT- 2023/06/02 19:24 PHST- 2023/03/28 00:00 [received] PHST- 2023/05/11 00:00 [revised] PHST- 2023/05/22 00:00 [accepted] PHST- 2023/06/21 06:42 [medline] PHST- 2023/06/03 11:42 [pubmed] PHST- 2023/06/02 19:24 [entrez] AID - S0003-2697(23)00160-4 [pii] AID - 10.1016/j.ab.2023.115195 [doi] PST - ppublish SO - Anal Biochem. 2023 Aug 1;674:115195. doi: 10.1016/j.ab.2023.115195. Epub 2023 Jun 1.