PMID- 32533780 OWN - NLM STAT- MEDLINE DCOM- 20210827 LR - 20210827 IS - 1470-8744 (Electronic) IS - 0885-4513 (Linking) VI - 68 IP - 3 DP - 2021 Jun TI - Determination of parvovirus antigen in the vaccine using time-resolved fluorescence immunoassay. PG - 597-602 LID - 10.1002/bab.1967 [doi] AB - As a highly contagious and potentially fatal disease of dogs, canine parvovirus type 2 (CPV-2) usually causes severe myocarditis and gastroenteritis, while vaccine injection has greatly reduced the incidence of CPV-2 diseases. However, there is currently a lack of simple and effective method for quantitative detection of CPV-2 in vaccine. Therefore, this study aims to prepare an accurate method to determine the CPV-2 antigen (CPV-2-Ag) in vaccine. Here, a sandwich time-resolved fluorescence immunoassay (TRFIA) was established and optimized. Anti-CPV-2 antibodies were immobilized on 96-well plates to capture CPV-2-Ag, and then bound together with the detection antibodies labeled with Europium(III) (Eu(3+) ) chelates; finally, time-resolved fluorometry was employed to measure the fluorescence intensity. Vaccination was performed to evaluate the relationship between CPV-2-Ag concentration and antibody titer. The sensitivity is 1.15 mEU/mL (LogY = 1.524 + 0.8667 x LogX, R(2) = 0.9933), and the average recovery is among 91.00% to 106.39% without cross-reactions with the other canine viral antigen. The correlation between ELISA assay and this method is up to 0.9861. And, there is high correlation between the CPV-2-Ag concentration and antibody titers (R(2) = 0.9234). This immunoassay established has high sensitivity, accuracy, and specificity, which indicate that this method could be suitable for quantitative detection of CPV-2-Ag in vaccine evaluation. CI - (c) 2020 International Union of Biochemistry and Molecular Biology, Inc. FAU - Chen, Cuicui AU - Chen C AD - Guangzhou Youdi Bio-Technology Co., Ltd., Guangzhou, 510663, China. FAU - Liang, Huankun AU - Liang H AD - Guangzhou Youdi Bio-Technology Co., Ltd., Guangzhou, 510663, China. FAU - Hu, Baoyu AU - Hu B AD - Guangzhou Youdi Bio-Technology Co., Ltd., Guangzhou, 510663, China. FAU - Ning, Bo AU - Ning B AD - Guangzhou Youdi Bio-Technology Co., Ltd., Guangzhou, 510663, China. FAU - Lai, Hongrui AU - Lai H AD - Guangzhou Youdi Bio-Technology Co., Ltd., Guangzhou, 510663, China. FAU - He, Ying AU - He Y AD - Guangzhou Youdi Bio-Technology Co., Ltd., Guangzhou, 510663, China. FAU - Guo, Guiling AU - Guo G AD - Guangzhou Youdi Bio-Technology Co., Ltd., Guangzhou, 510663, China. FAU - Zhong, Shuhai AU - Zhong S AD - Guangzhou Youdi Bio-Technology Co., Ltd., Guangzhou, 510663, China. FAU - Li, Laiqing AU - Li L AUID- ORCID: 0000-0002-1663-4142 AD - Guangzhou Youdi Bio-Technology Co., Ltd., Guangzhou, 510663, China. LA - eng GR - 201906010055/Pearl River S&T Nova Program of Guangzhou/ PT - Journal Article DEP - 20200714 PL - United States TA - Biotechnol Appl Biochem JT - Biotechnology and applied biochemistry JID - 8609465 RN - 0 (Antibodies, Viral) RN - 0 (Antigens, Viral) RN - 0 (Viral Vaccines) SB - IM MH - Animals MH - Antibodies, Viral/immunology MH - Antigens, Viral/*analysis/immunology MH - Dogs MH - Enzyme-Linked Immunosorbent Assay MH - *Fluoroimmunoassay MH - Parvovirus, Canine/immunology/*isolation & purification MH - Vaccination MH - Viral Vaccines/*immunology OTO - NOTNLM OT - canine OT - parvovirus antigen OT - time-resolved fluorescence immunoassay OT - vaccine EDAT- 2020/06/14 06:00 MHDA- 2021/08/28 06:00 CRDT- 2020/06/14 06:00 PHST- 2020/04/27 00:00 [received] PHST- 2020/06/06 00:00 [accepted] PHST- 2020/06/14 06:00 [pubmed] PHST- 2021/08/28 06:00 [medline] PHST- 2020/06/14 06:00 [entrez] AID - 10.1002/bab.1967 [doi] PST - ppublish SO - Biotechnol Appl Biochem. 2021 Jun;68(3):597-602. doi: 10.1002/bab.1967. Epub 2020 Jul 14.