Iranian Journal of Parasitology 2018. 13(1):11-23.

Immunoprophylactic Potential of a Cocktail of Three Low Mo-lecular Weight Antigens of Leishmania donovani along with Various Adjuvants Against Experimental Visceral leishmania-sis
Harpreet KAUR, Ankita THAKUR, Sukhbir KAUR


Background: Currently, there is no vaccine available for any form of leishmaniasis for human use, including visceral leishmaniasis (VL). The treatment relies on drugs associated with severe toxic side effects and increased parasite drug resistance. At present, there is a strong need to develop and implement a successful vaccine against this disease. Therefore, we evaluated immunoprophylactic potential of a cocktail of low molecular weight antigens along with various adjuvants.

Methods: The three antigens (2015, Department of Zoology, Panjab University, Chandigarh), 31kDa, 36 kDa and 51 kDa of L. donovani were used in this study. Inbred BALB/c mice were immunized with 10 µg of cocktail antigens i.e. 31+36+51kDa alone and along with different adjuvants (ALD, saponin, and liposome). Mice were boosted twice at an interval of 2 wk and after last dose; mice were given challenge infection with 107 promastigotes. Mice have sacrificed15 d post immunization and on 30, 60, 90 post-challenge days for evaluation of different parameters.

Results: Immunized animals showed reduced parasite load, increased DTH responses and elevated levels of IgG2a antibody. The levels of Th1 cytokines were higher as compared to Th2 cytokines in immunized animals.

Conclusion: Best results were obtained with cocktail of 31+36+51+liposome and this combination conferred maximum protection.


Cocktail antigens, Experimental visceral leishmaniasis, Adjuvants

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