Effect of garlic extract on cutaneous leishmaniasis and the role of nitric oxide

ABSTRACT

The production of nitric oxide [NO] is important in the final outcome of leishmaniasis in animal models. The efficacy of garlic therapy and a combination of garlic and vitamin A were compared with an antimonial drug [glucantime] to assess healing and regulation of NO release in mice infected with Leishmania major. The mice were subjected to 3 105 promastigotes and allowed to induce a lesion. The mice were treated with above compounds twice a day for 45 days. The diameter of the lesion was measured on days 1, 10, 20, 30 and 45. In a separate experiment, NO release by peritoneal macrophages was measured. The diameter of lesion was reduced by aqueous extract of garlic within 30 days of treatment. However, the maximum reduction was induced when mice were subjected to vitamin A for 10 days before the administration of the aqueous extract for 30 days. A significant correlation between healing and the amount of NO release was also found. A combination of aqueous extract of garlic and vitamin A can treat leishmanisis