APPLICATION OF RECOMBINANT TES-30 ANTIGEN TO DETECT IgG ANTIBODY IN SERA OF TOXOCARIASIS PATIENTS BY ELISA TECHNIQUE

Thị Hà Trinh Nguyễn, Minh Quyền Nguyễn, Thị Ngọc Diệp Hoàng, Thị Hòa Hoàng, Như Bình Đỗ, Khắc Lực Nguyễn, Quốc Tuấn Lê1,
1 Học viện Quân y

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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.

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References

1. Smith H, Holland C, Taylor M, Magnaval JF, Schantz P, Maizels R. How common is human toxocariasis? Towards standardizing our knowledge. Trends in Parasitology. 2009; 25(4): 182-188.
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.