In vitro and in vivo activity of Aloe vera leaf exudate in experimental visceral leishmaniasis

Avijit Dutta, Debjani Sarkar, Ameenah Gurib-Fakim, Chitra Mandal, Mitali Chatterjee*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

40 Scopus citations

Abstract

The leishmanicidal activity of Aloe vera leaf exudate (AVL) has been demonstrated in promastigotes and axenic amastigotes, but its effectiveness in animal models has not been evaluated. The presence of alkaloids, triterpenes, cyanidines, proanthocyanidines, tannins, and saponins in AVL was identified. Its effectiveness in four Leishmania donovani strains was studied both in promastigotes (IC50 ranged from 70-115 μg/ml) and amastigotes (IC50 ranged from 3.1-11.4 μg/ml). In amastigotes, the killing by AVL was facilitated through its induction of nitric oxide in leishmania-infected macrophages. The safety index was good as AVL up to 300 μg/ml remained non-toxic to monocytes and macrophages. In a L. donovani BALB/c mouse model, oral or subcutaneous administration of AVL (15 mg/kg body weight×5 days) reduced parasitemia by >90% in the liver, spleen, and bone marrow without impairment of hepatic and renal functions. Collectively, we conclude that AVL shows promising antileishmanial activity and may provide a new lead agent in the treatment of Leishmaniasis.

Original languageEnglish
Pages (from-to)1235-1242
Number of pages8
JournalParasitology Research
Volume102
Issue number6
DOIs
StatePublished - 05 2008

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