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Hema Sayee R, Hosamani M, Krishnaswamy N, Shanmuganathan S, Nagasupreeta SR, Sri Sai Charan M, Sheshagiri G, Gairola V, Basagoudanavar SH, Sreenivasa BP, Bhanuprakash V. Monoclonal antibody based solid phase competition ELISA to detect FMDV serotype A specific antibodies. J Virol Methods 2024; 328:114959. [PMID: 38788979 DOI: 10.1016/j.jviromet.2024.114959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 04/30/2024] [Accepted: 05/19/2024] [Indexed: 05/26/2024]
Abstract
In Foot-and-mouth disease (FMD) enzootic countries, periodic vaccination is the key tool in controlling the disease incidence. Active seromonitoring of the vaccinated population is critical to assess the impact of vaccination. Virus neutralization test (VNT) and enzyme-linked immunosorbent assays (ELISA) are commonly used for antibody detection. Assays like liquid phase blocking ELISA (LPBE) or solid phase competition ELISA (SPCE) are preferred as they do not require handling of live FMDV and are routinely used for seromonitoring or for vaccine potency testing; however, false positives are high in LPBE. Here we report, a monoclonal antibody (mAb) based SPCE as a potential alternate assay for antibody titration. From a panel of 12 mAbs against FMDV serotype A, two mAbs were chosen for the development of SPCE. Based on a set of 453 sera, it was demonstrated that mAb 2C4G11, mAb 6E8D11and polyclonal antibody (pAb) based SPCE had a relative sensitivity of 86.1, 86.1 and 80.3 %; and specificity of 99.6, 99.1 and 99.1 %, respectively. The correlation, repeatability, and level of agreement of the assays were high demonstrating the potential use of mAb in large scale surveillance studies and regular vaccine potency testing.
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Affiliation(s)
- Rajamanickam Hema Sayee
- FMD QC laboratory, ICAR-Indian Veterinary Research Institute, H A Farm, Hebbal, Bengaluru, Karnataka 560 024, India
| | - Madhusudan Hosamani
- FMD QC laboratory, ICAR-Indian Veterinary Research Institute, H A Farm, Hebbal, Bengaluru, Karnataka 560 024, India.
| | - Narayanan Krishnaswamy
- FMD QC laboratory, ICAR-Indian Veterinary Research Institute, H A Farm, Hebbal, Bengaluru, Karnataka 560 024, India
| | - Subramaniyan Shanmuganathan
- FMD QC laboratory, ICAR-Indian Veterinary Research Institute, H A Farm, Hebbal, Bengaluru, Karnataka 560 024, India
| | - S R Nagasupreeta
- FMD QC laboratory, ICAR-Indian Veterinary Research Institute, H A Farm, Hebbal, Bengaluru, Karnataka 560 024, India
| | - Manchikanti Sri Sai Charan
- FMD QC laboratory, ICAR-Indian Veterinary Research Institute, H A Farm, Hebbal, Bengaluru, Karnataka 560 024, India
| | - Ganesh Sheshagiri
- FMD QC laboratory, ICAR-Indian Veterinary Research Institute, H A Farm, Hebbal, Bengaluru, Karnataka 560 024, India
| | - Vivek Gairola
- FMD QC laboratory, ICAR-Indian Veterinary Research Institute, H A Farm, Hebbal, Bengaluru, Karnataka 560 024, India
| | - Suresh H Basagoudanavar
- FMD QC laboratory, ICAR-Indian Veterinary Research Institute, H A Farm, Hebbal, Bengaluru, Karnataka 560 024, India
| | - B P Sreenivasa
- FMD QC laboratory, ICAR-Indian Veterinary Research Institute, H A Farm, Hebbal, Bengaluru, Karnataka 560 024, India
| | - Veerakyathappa Bhanuprakash
- FMD QC laboratory, ICAR-Indian Veterinary Research Institute, H A Farm, Hebbal, Bengaluru, Karnataka 560 024, India.
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Pan J, Li Y, Wang T, Chang J, Hao L, Chen J, Peng W, Deng J, Huang B, Tian K. A poly(dimethylsiloxane)-based solid-phase microchip platform for dual detection of Pseudorabies virus gD and gE antibodies. Front Cell Infect Microbiol 2022; 12:912108. [PMID: 35959367 PMCID: PMC9360482 DOI: 10.3389/fcimb.2022.912108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 06/28/2022] [Indexed: 11/29/2022] Open
Abstract
Pseudorabies caused by pseudorabies virus (PRV) infection is still a major disease affecting the pig industry; its eradication depends on effective vaccination and antibody (Ab) detection. For a more rapid and accurate PRV detection method that is suitable for clinical application, here, we established a poly(dimethylsiloxane)-based (efficient removal of non-specific binding) solid-phase protein chip platform (blocking ELISA) for dual detection of PRV gD and gE Abs. The purified gD and gE proteins expressed in baculovirus were coated into the highly hydrophobic nanomembrane by an automatic spotter, and the gray values measured by a scanner were used for the S/N (sample/negative) value calculation (gD and gE Abs standard, positive: S/N value ≤0.6; negative: S/N value >0.7; suspicious: 0.6 < S/N ≤ 0.7). The method showed an equal sensitivity in the gD Ab test of immunized pig serum samples compared to the neutralization test and higher sensitivity in the gE Ab test compared to the commercial gE Ab detection kit. In the clinical evaluation, we found an agreement of 100% (122/122) in the gD Ab detection compared to the neutralization test and an agreement of 97.5% (119/122) in the gE Ab detection compared to the commercial PRV gE Ab detection kit. In summary, the protein chip platform for dual detection of PRV gD and gE Abs showed high sensitivity and specificity, which is suitable for PRV immune efficacy evaluation and epidemic monitoring.
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Affiliation(s)
| | - Yufang Li
- Luoyang Zhongke Biochip Technology Co., Ltd., Luoyang, China
| | - Tongyan Wang
- National Research Center for Veterinary Medicine, Luoyang, China
| | | | - Liying Hao
- Luoyang Putai Biotech Co., Ltd., Luoyang, China
| | - Junjie Chen
- Department of Statistical Science, University College London, London, United Kingdom
| | - Wuping Peng
- Luoyang Putai Biotech Co., Ltd., Luoyang, China
| | - Junhua Deng
- Luoyang Putai Biotech Co., Ltd., Luoyang, China
| | - Baicheng Huang
- National Research Center for Veterinary Medicine, Luoyang, China
| | - Kegong Tian
- National Research Center for Veterinary Medicine, Luoyang, China
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