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Martviset P, Thanongsaksrikul J, Geadkaew-Krenc A, Chaimon S, Glab-Ampai K, Chaibangyang W, Sornchuer P, Srimanote P, Ruangtong J, Prathaphan P, Taechadamrongtham T, Torungkitmangmi N, Sanannam B, Gordon CN, Thongsepee N, Pankao V, Chantree P. Production and immunological characterization of the novel single-chain variable fragment (scFv) antibodies against the epitopes on Opisthorchis viverrini cathepsin F (OvCatF). Acta Trop 2024; 254:107199. [PMID: 38552996 DOI: 10.1016/j.actatropica.2024.107199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/10/2024] [Accepted: 03/26/2024] [Indexed: 04/09/2024]
Abstract
BACKGROUND Opisthorchis viverrini infection is a significant health problem in several countries, especially Southeast Asia. The infection causes acute gastro-hepatic symptoms and also long-term infection leading to carcinogenesis of an aggressive bile duct cancer (cholangiocarcinoma; CCA). Hence, the early diagnosis of O. viverrini infection could be the way out of this situation. Still, stool examination by microscopic-based methods, the current diagnostic procedure is restricted by low parasite egg numbers in the specimen and unprofessional laboratorians. The immunological procedure provides a better chance for diagnosis of the infection. Hence, this study aims to produce single-chain variable fragment (scFv) antibodies for use as a diagnostic tool for O. viverrini infection. METHODS This study uses phage display technologies to develop the scFv antibodies against O. viverrini cathepsin F (OvCatF). The OvCatF-deduced amino acid sequence was analyzed and predicted for B-cell epitopes used for short peptide synthesis. The synthetic peptides were used to screen the phage library simultaneously with OvCatF recombinant protein (rOvCatF). The potentiated phages were collected, rescued, and reassembled in XL1-blue Escherichia coli (E. coli) as a propagative host. The positive clones of phagemids were isolated, and the single-chain variable (scFv) fragments were sequenced, computationally predicted, and molecular docked. The complete scFv fragments were digested from the phagemid, subcloned into the pOPE101 expression vector, and expressed in XL1-blue E. coli. Indirect ELISA and Western analysis were used to verify the detection efficiency. RESULTS The scFv phages specific to OvCatF were successfully isolated, subcloned, and produced as a recombinant protein. The recombinant scFv antibodies were purified and refolded to make functional scFv. The evaluation of specific recognition of the particular epitopes and detection limit results by both computational and laboratory performances demonstrated that all three recombinant scFv antibodies against OvCatF could bind specifically to rOvCatF, and the lowest detection concentration in this study was only one hundred nanograms. CONCLUSION Our produced scFv antibodies will be the potential candidates for developing a practical diagnostic procedure for O. viverrini infection in humans in the future.
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Affiliation(s)
- Pongsakorn Martviset
- Department of Preclinical Science, Faculty of Medicine, Thammasat University, Pathumthani, Thailand; Thammasat University Research Unit in Nutraceuticals and Food Safety, Thammasat University, Pathumthani, Thailand; Graduate Program in Applied Biosciences, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
| | - Jeeraphong Thanongsaksrikul
- Graduate Studies in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand
| | - Amornrat Geadkaew-Krenc
- Graduate Studies in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand
| | - Salisa Chaimon
- Department of Preclinical Science, Faculty of Medicine, Thammasat University, Pathumthani, Thailand; Graduate Program in Applied Biosciences, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
| | - Kantaphon Glab-Ampai
- Center of Research Excellence in Therapeutic Proteins and Antibody Engineering, Department of Parasitology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Wanlapa Chaibangyang
- Department of Medical Technology, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand
| | - Phornphan Sornchuer
- Department of Preclinical Science, Faculty of Medicine, Thammasat University, Pathumthani, Thailand; Thammasat University Research Unit in Nutraceuticals and Food Safety, Thammasat University, Pathumthani, Thailand
| | - Potjanee Srimanote
- Graduate Studies in Biomedical Sciences, Faculty of Allied Health Sciences, Thammasat University, Pathumthani, Thailand
| | - Jittiporn Ruangtong
- Thammasat University Research Unit in Nutraceuticals and Food Safety, Thammasat University, Pathumthani, Thailand
| | - Parisa Prathaphan
- Graduate Program in Applied Biosciences, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
| | | | - Nattaya Torungkitmangmi
- Graduate Program in Biochemistry and Molecular Biology, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
| | - Bumpenporn Sanannam
- Department of Preclinical Science, Faculty of Medicine, Thammasat University, Pathumthani, Thailand; Graduate Program in Applied Biosciences, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
| | | | - Nattaya Thongsepee
- Department of Preclinical Science, Faculty of Medicine, Thammasat University, Pathumthani, Thailand; Thammasat University Research Unit in Nutraceuticals and Food Safety, Thammasat University, Pathumthani, Thailand; Graduate Program in Applied Biosciences, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
| | - Viriya Pankao
- Department of Preclinical Science, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
| | - Pathanin Chantree
- Department of Preclinical Science, Faculty of Medicine, Thammasat University, Pathumthani, Thailand; Thammasat University Research Unit in Nutraceuticals and Food Safety, Thammasat University, Pathumthani, Thailand; Graduate Program in Applied Biosciences, Faculty of Medicine, Thammasat University, Pathumthani, Thailand.
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