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Journal of Integrative Agriculture  2016, Vol. 15 Issue (10): 2363-2368    DOI: 10.1016/S2095-3119(16)61345-X
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Development and optimization of a double antibody sandwich ELISA for the detection of goose T cell surface CD8α molecule
ZHANG Wei1*, CHENG Bei-bei1*, CHEN Shun1, 2, 3*, WANG Ming-shu1, 2, 3, JIA Ren-yong1, 2, 3, ZHU De-kang2, 3, LIU Ma-feng1, 2, 3, LIU Fei3, SUN Kun-feng1, 2, 3, YANG Qiao1, 2, 3, WU Ying1, 2, 3, CHEN Xiao-yue2, 3, CHENG An-chun1, 2, 3
1 Institute of Preventive Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R.China
2 Avian Disease Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu 611130, P.R.China
3 Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, P.R.China
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Abstract      CD8, a glycoprotein on the surface of T cells, is involved in the defense against viral infection and plays significant roles in antigen presentation and in the antiviral immune response. CD8 is composed of two chains. Of these, the CD8α chain was chosen for the detection because it involved in both the CD8αα homodimer and the CD8αβ heterodimer. Here, we established a double antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) for specific detection of goose CD8α (goCD8α). The results showed that the optimal coated antibody and antigen dilutions were 1:50 (the antibody titer was 1:12 800) and 1:32 (0.3 ng mL–1), respectively, while the optimal capture antibody and horseradish peroxidase (HRP)-labelled goat anti-rabbit IgG dilutions were 1:50 (the antibody titer was 1:51 200) and 1:4 000 (the antibody titer was 1:5 000), respectively. The optimal blocking buffer was 5% bovine serum albumin (BSA). The best incubating condition was overnight at 4°C, the best blocking time was 120 min and the best anti-capture antibody working time was 150 min. In addition, the minimum dose detectable by DAS-ELISA was 5×10–3 ng mL–1. Most importantly, goCD8α expression levels in goose spleen mononuclear cells (MNCs) post-Goose parvoviruse (GPV) infection were found to be significantly up-regulated using the DAS-ELISA method, which was consistent with previous results obtained using real-time quantitative PCR. In conclusion, the DAS-ELISA method reported here is a novel, specific technique for the clinical detection of goCD8α.
Keywords:  T cells        goose CD8&alpha       polyclonal antibody        double antibody sandwich ELISA  
Received: 28 October 2015   Accepted: 01 October 2016

This work was funded by the National Natural Science Foundation of China (31201891), the Ph D Programs Foundation of Ministry of Education of China (20125103120012), the Innovative Research Team Program in Education Department of Sichuan Province, China (2013TD0015), the National Key Technology R&D Program of China (2015BAD12B05), the Integration and Demonstration of Key Technologies for Duck Industrial in Sichuan Province, China (2014NZ0030), and the China Agricultural Research System (CARS-43-8).

Corresponding Authors:  CHEN Shun, Tel: +86-28-86291482, E-mail:; CHENG An-chun, E-mail:   
About author:  ZHANG Wei, E-mail:;

Cite this article: 

ZHANG Wei, CHENG Bei-bei, CHEN Shun, WANG Ming-shu, JIA Ren-yong, ZHU De-kang, LIU Mafeng, LIU Fei, SUN Kun-feng, YANG Qiao, WU Ying, CHEN Xiao-yue, CHENG An-chun. 2016. Development and optimization of a double antibody sandwich ELISA for the detection of goose T cell surface CD8α molecule. Journal of Integrative Agriculture, 15(10): 2363-2368.

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