Gallic and ellagic acids: two natural immunomodulator compounds solve infection of macrophages by Leishmania major.

Autor: Alves MMM; Núcleo de Pesquisas em Plantas Medicinais, Universidade Federal do Piauí, Avenida Universitária lado ímpar, Teresina, 64049-550, Piauí, Brazil., Brito LM; Núcleo de Pesquisas em Plantas Medicinais, Universidade Federal do Piauí, Avenida Universitária lado ímpar, Teresina, 64049-550, Piauí, Brazil., Souza AC; Núcleo de Pesquisas em Plantas Medicinais, Universidade Federal do Piauí, Avenida Universitária lado ímpar, Teresina, 64049-550, Piauí, Brazil., Queiroz BCSH; Núcleo de Pesquisas em Plantas Medicinais, Universidade Federal do Piauí, Avenida Universitária lado ímpar, Teresina, 64049-550, Piauí, Brazil., de Carvalho TP; Núcleo de Pesquisas em Plantas Medicinais, Universidade Federal do Piauí, Avenida Universitária lado ímpar, Teresina, 64049-550, Piauí, Brazil., Batista JF; Laboratório de Sanidade Animal, Universidade Federal do Piauí, Teresina, Piauí, Brazil., Oliveira JSSM; Laboratório de Produtos Naturais, Universidade Federal do Piauí, Teresina, Piauí, Brazil., de Mendonça IL; Laboratório de Sanidade Animal, Universidade Federal do Piauí, Teresina, Piauí, Brazil., Lira SRS; Laboratório de Sanidade Animal, Universidade Federal do Piauí, Teresina, Piauí, Brazil., Chaves MH; Laboratório de Produtos Naturais, Universidade Federal do Piauí, Teresina, Piauí, Brazil., Gonçalves JCR; Núcleo de Pesquisas em Plantas Medicinais, Universidade Federal do Piauí, Avenida Universitária lado ímpar, Teresina, 64049-550, Piauí, Brazil., Carneiro SMP; Núcleo de Pesquisas em Plantas Medicinais, Universidade Federal do Piauí, Avenida Universitária lado ímpar, Teresina, 64049-550, Piauí, Brazil., Arcanjo DDR; Núcleo de Pesquisas em Plantas Medicinais, Universidade Federal do Piauí, Avenida Universitária lado ímpar, Teresina, 64049-550, Piauí, Brazil. daniel.arcanjo@ufpi.edu.br., Carvalho FAA; Núcleo de Pesquisas em Plantas Medicinais, Universidade Federal do Piauí, Avenida Universitária lado ímpar, Teresina, 64049-550, Piauí, Brazil.; Departamento de Bioquímica e Farmacologia, Universidade Federal do Piauí, Teresina, Piauí, Brazil.
Jazyk: angličtina
Zdroj: Naunyn-Schmiedeberg's archives of pharmacology [Naunyn Schmiedebergs Arch Pharmacol] 2017 Sep; Vol. 390 (9), pp. 893-903. Date of Electronic Publication: 2017 Jun 22.
DOI: 10.1007/s00210-017-1387-y
Abstrakt: Leishmaniasis is a complex of parasitic protozoan diseases caused by more than 20 different species of parasites from Leishmania genus. Conventional treatments are high costly, and promote a sort of side effects. Besides, protozoan resistance to treatments has been reported. Natural products have been investigated as a source of new therapeutic alternatives, not only acting directly against the parasite but also being able to synergistically act on the host immune system in order to control parasitemia. Gallic acid (GA) and ellagic acid (EA) are plant-derived phenolic compounds which are able to induce antiinflammatory, gastroprotective, and anticarcinogenic activities. Therefore, the antileishmania, cytotoxic, and immunomodulatory activities of GA and EA were evaluated in this study. Both GA and EA were able to inhibit the growth of Leishmania major promastigotes (effective concentration (EC 50 ) values 16.4 and 9.8 μg/mL, respectively). The cytotoxicity against BALB/c murine macrophages for GA and EA was also assessed (CC 50 values 126.6 and 23.8 μg/mL, respectively). Interestingly, GA and EA also significantly reduced the infection and infectivity of macrophages infected by L. major (EC 50 values 5.0 and 0.9 μg/mL, respectively), with selectivity index higher than 20. Furthermore, both GA and EA induced high immunomodulatory activity evidenced by the increase of phagocytic capability, lysosomal volume, nitrite release, and intracellular calcium [Ca 2+ i ] in macrophages. Further investigations are reinforced in order to evaluate the therapeutic effects of GA and EA in in vivo experimental infection model of leishmaniasis.
Databáze: MEDLINE