APPLICATION OF RECOMBINANT TES-30 ANTIGEN TO DETECT IgG ANTIBODY IN SERA OF TOXOCARIASIS PATIENTS BY ELISA TECHNIQUE
Main Article Content
Abstract
Objectives: To use recombinant TES protein to improve the quality of the ELISA kit detecting anti-TES IgG in the infected sera to lessen the disadvantages of raw TES-based ELISA kit as low sensitivity and specificity. Methods: Descriptive experimental study in the laboratory using recombinant TES-30 (rTES-30) protein expressed in E. coli BL21 (DE3) to develop an ELISA kit to detect IgG antibody in the sera of infected patients. Results: A recombinant TES-based ELISA kit has been produced. The concentration of recombinant TES-30 protein was 1 µg/mL and the cut-off value was 0.4. The sandwich ELISA using rTES-30 possessed a sensitive level reaching 93.3% and a specificity of 100%. Conclusion: A recombinant TES-based ELISA kit has been successfully developed for human anti-TES IgG detection. This recombinant protein held great potential for developing diagnostic tests for Toxocariasis in Vietnam.
Article Details
Keywords
Toxocara spp. excretory/secretory antigen, Recombinant protein TES-30, Expression
References
2. Trần Thị Kim Dung, Trần Phủ Mạnh Siêu. Bệnh do giun lươn và giun đũa chó mèo. Nhà xuất bản Y học. 2009: 82-107.
3. Fillaux J, Magnaval JF. Laboratory diagnosis of human toxocariasis. Vet. Parasitol. 2013; 193:327-336.
4. Moreira GMSG, Telmo P de L, Mendonça M, Moreira Ângela Nunes, McBride AJA, Scaini CJ, et al. Human toxocariasis: Current advances in diagnostics, treatment, and interventions. Trends Parasitol. 2014; 30(9):456-464.
5. Yamasaki H, et al. Molecular characterization of a cDNA encoding an excretory-secretory antigen from Toxocara canis second stage larvae and its application to the immunodiagnosis of human toxocariasis. Parasitol. Int. 1998; 47:171-181.
6. Yamasaki H, et al. Development of a highly specific recombinant Toxocara canis second-stage larva excretory-secretory antigen for immunodiagnosis of human toxocariasis. J. Clin. Microbiol. 2000; 38:1409-1413.
7. Norhaida A, et al. rTES-30USM: Cloning via assembly PCR, expression, and evaluation of usefulness in the detection of toxocariasis. Ann. Trop. Med. Parasitol. 2008; 102:151-160.