Original Article

A Novel Chimeric Antigen as a Vaccine Candidate against Leishmania major: In silico Analysis


Background: Leishmania is a mandatory intracellular pathogen and causing neglected disease. Hence, protection against leishmaniasis by a development vaccine is an important subject. This study aimed to design a poly-epitope vaccine for cutaneous leishmaniasis.

Methods: The present study was conducted in the Parasitology Department of Tarbiat Modares University, Tehran, Iran during 2017-2019. Several bioinformatics methods at online servers were used for prediction of different aspects of poly-epitope, including, physico-chemical attributes, allergenicity, antigenicity, secondary and tertiary structures, B-cell, T-cell and MHC (I, II) potential epitopes of LACK, LEIF, GP63 and SMT antigens of L. major.

Results: After designing the construct (GLSL), the outputs of PTM sites demonstrated that the poly-epitope had 57 potential sites for phosphorylation. Furthermore, the secondary of GLSL structure includes 59.42%, 20.94% and 19.63% for random coil, extended strand and alpha-helix, respectively. The GLSL is an immunogenic protein with an acceptable antigenicity (0.8410) and non-allergen. Afterward, 20 potential epitopes of LACK, LEIF, GP63 and SMT antigens were linked by a flexible linker (SAPGTP), then was synthesized, and sub-cloned in pLEXY– neo2. The results were confirmed the expression of 38.7 kDa poly-epitope in secretory and cytosolic sites, separately.

Conclusion: A good expression in the L. tarentulae and confirmation of the GLSL poly-epitope could be a basis for developing a vaccine candidate against leishmaniasis that should be confirmed via experimental tests in BALB/c mice.

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IssueVol 16 No 2 (2021) QRcode
SectionOriginal Article(s)
DOI https://doi.org/10.18502/ijpa.v16i2.6267
Leishmania major Chimeric antigen Vaccine In silico analysis

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How to Cite
Bavarsad Ahmadpour N, Dalimi A, Pirestani M, Sadraei J. A Novel Chimeric Antigen as a Vaccine Candidate against Leishmania major: In silico Analysis. Iran J Parasitol. 16(2):186-198.