PMID- 26544909 OWN - NLM STAT- MEDLINE DCOM- 20160707 LR - 20240324 IS - 1520-6882 (Electronic) IS - 0003-2700 (Print) IS - 0003-2700 (Linking) VI - 87 IP - 23 DP - 2015 Dec 1 TI - Method for Sorting and Pairwise Selection of Nanobodies for the Development of Highly Sensitive Sandwich Immunoassays. PG - 11907-14 LID - 10.1021/acs.analchem.5b03561 [doi] AB - Single domain heavychain binders (nanobodies) obtained from camelid antibody libraries hold a great promise for immunoassay development. However, there is no simple method to select the most valuable nanobodies from the crowd of positive clones obtained after the initial screening. In this paper, we describe a novel nanobody-based platform that allows comparison of the reactivity of hundreds of clones with the labeled antigen, and identifies the best nanobody pairs for two-site immunoassay development. The output clones are biotinylated in vivo in 96-well culture blocks and then used to saturate the biotin binding capacity of avidin coated wells. This standardizes the amount of captured antibody allowing their sorting by ranking their reactivity with the labeled antigen. Using human soluble epoxide hydrolase (sEH) as a model antigen, we were able to classify 96 clones in four families and confirm this classification by sequencing. This provided a criterion to select a restricted panel of five capturing antibodies and to test each of them against the rest of the 96 clones. The method constitutes a powerful tool for epitope binning, and in our case allowed development of a sandwich ELISA for sEH with a detection limit of 63 pg/mL and four log dynamic range, which performed with excellent recovery in different tissue extracts. This strategy provides a systematic way to test nanobody pairwise combinations and would have a broad utility for the development of highly sensitive sandwich immunoassays. FAU - Rossotti, Martin A AU - Rossotti MA AD - Catedra de Inmunologia, DEPBIO, Facultad de Quimica, Instituto de Higiene, UDELAR , Montevideo, Uruguay. FAU - Pirez, Macarena AU - Pirez M AD - Catedra de Inmunologia, DEPBIO, Facultad de Quimica, Instituto de Higiene, UDELAR , Montevideo, Uruguay. FAU - Gonzalez-Techera, Andres AU - Gonzalez-Techera A AD - Catedra de Inmunologia, DEPBIO, Facultad de Quimica, Instituto de Higiene, UDELAR , Montevideo, Uruguay. FAU - Cui, Yongliang AU - Cui Y AD - Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California , Davis, California, United States. FAU - Bever, Candace S AU - Bever CS AD - Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California , Davis, California, United States. FAU - Lee, Kin S S AU - Lee KS AD - Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California , Davis, California, United States. FAU - Morisseau, Christophe AU - Morisseau C AD - Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California , Davis, California, United States. FAU - Leizagoyen, Carmen AU - Leizagoyen C AD - Parque Lecocq, IMM, Montevideo, Uruguay. FAU - Gee, Shirley AU - Gee S AD - Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California , Davis, California, United States. FAU - Hammock, Bruce D AU - Hammock BD AD - Department of Entomology and Nematology and UC Davis Comprehensive Cancer Center, University of California , Davis, California, United States. FAU - Gonzalez-Sapienza, Gualberto AU - Gonzalez-Sapienza G AD - Catedra de Inmunologia, DEPBIO, Facultad de Quimica, Instituto de Higiene, UDELAR , Montevideo, Uruguay. LA - eng GR - D43 TW005718/TW/FIC NIH HHS/United States GR - 1K99ES024806-01/ES/NIEHS NIH HHS/United States GR - K99 ES024806/ES/NIEHS NIH HHS/United States GR - P42 ES004699/ES/NIEHS NIH HHS/United States GR - P30 ES023513/ES/NIEHS NIH HHS/United States GR - P42 ES04699/ES/NIEHS NIH HHS/United States GR - TW05718/TW/FIC NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20151118 PL - United States TA - Anal Chem JT - Analytical chemistry JID - 0370536 RN - 0 (Antigens) RN - 0 (Recombinant Proteins) RN - 0 (Single-Domain Antibodies) RN - EC 3.3.2.- (Epoxide Hydrolases) SB - IM MH - Antigen-Antibody Reactions MH - Antigens/chemistry/metabolism MH - *Enzyme-Linked Immunosorbent Assay MH - Epoxide Hydrolases/chemistry/metabolism MH - Humans MH - Recombinant Proteins/chemistry/metabolism MH - Single-Domain Antibodies/*immunology/*isolation & purification MH - Solubility PMC - PMC4666776 MID - NIHMS738809 EDAT- 2015/11/07 06:00 MHDA- 2016/07/09 06:00 PMCR- 2016/12/01 CRDT- 2015/11/07 06:00 PHST- 2015/11/07 06:00 [entrez] PHST- 2015/11/07 06:00 [pubmed] PHST- 2016/07/09 06:00 [medline] PHST- 2016/12/01 00:00 [pmc-release] AID - 10.1021/acs.analchem.5b03561 [doi] PST - ppublish SO - Anal Chem. 2015 Dec 1;87(23):11907-14. doi: 10.1021/acs.analchem.5b03561. Epub 2015 Nov 18.