Determination of the Effective Dose of Curcumin alone and in Combination with Antimicrobial Peptide CM11 on Promastigote Forms of Iranian Strain of L. major (MRHO / IR / 75 / ER)

Document Type : Original Articles


1 Department of Parasitology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran

2 Department of Microbiology, Faculty of Medicine, University of Wasit, Iraq

3 Institute Molecular Biological System Transfer (MBST)

4 Department of Pathobiology, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran

5 Department of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran


Zoonotic cutaneous leishmaniasis t caused by Leishmania major is spread in focal areas of more than 90 countries in the tropics, subtropics, and southern Europe. In the absence of any effective vaccine, the only means to treat and control leishmaniasis is conventional medication. Glucantime is the first choice of anti-leishmanialdrug, has serious side effects like high toxicity, exorbitant cost, problems with the administration and development of resistance. Curcumin is the active component from the rhizome of herb Curcuma longa, possessing many pharmacological and biological activities with antiprotozoal and anti-proliferative effects which make it a good alternative to existing therapy. Antimicrobial peptides like CM11, a small peptide consisting of 11 amino acids, are also novel potential drugs against at least wide spectrum of microbial organisms. The aim of this study was to evaluate the effect of curcumin alone and in combination with CM11 on promastigote form of L. major (MRHO / IR / 75 / ER) for 12h and 24h in vitro. The results of Giemsa staining showed that the morphology of the flagellum and cell shape increased changed with increasing concentration of curcumin (5 µM, 10 μM, 20 μM, 40 μM and 80 μM). MTT and Trypan blue results demonstrated that the promastigotes were susceptible against curcumin in dose and time dependent manner, while CM11 alone at concentration of 8 µM as well as in combination with 10 and 20 µM curcumin had no significant effect on promastigotes. Our results revealed that curcumin can provide a new curative candidate against cutaneous leishmaniasis.


Main Subjects

Article Title [French]

Détermination de la Dose Efficace de Curcumine Seule et en Association avec le Peptide Antimicrobien CM11 sur la Forme Promastigote de la Souche Iranienne Leishmania major (MRHO/IR/75/ER)

Abstract [French]

La leishmaniose cutanée zoonotique causée par Leishmania major est répandue dans certaines zones de plus de 90 pays situés dans des régions tropicales, subtropicales et du sud de l'Europe. En l'absence de vaccin efficace, le seul moyen de traiter et de contrôler la leishmaniose est le traitement conventionnel. Le glucantime constitue le premier choix parmi les agents anti-leishmaniens, mais exerce des effets secondaires graves, notamment une toxicité élevée, des coûts exorbitants, des problèmes d’administration et le développement de résistances. La curcumine est le composant actif du rhizome de la plante Curcuma longa et possède de nombreux impacts pharmacologiques et biologiques. Les effets antiprotozoaires et anti-prolifératifs et anti-prolifératifs de cet agent en font une alternative appropriée au traitement existant. De plus, les peptides antimicrobiens, tels que le CM11, qui est un petit peptide composé de 11 acides aminés, sont de nouveaux médicaments potentiels efficaces contre un large spectre d'organismes microbiens. Le but de cette étude était donc d'évaluer l'influence de la curcumine seule et en association avec le peptide antimicrobien CM11 sur la forme promastigote de L. major (MRHO/IR/75/ER) après 12 et 24 heures d'exposition in vitro. La coloration de Giemsa a indiqué des modifications morphologiques au niveau des cellules du flagelle associées à l’augmentation de la concentration de curcumine administrée (5, 10, 20, 40 et 80 μM). Les résultats du test MTT et du bleu de trypan ont montré que les promastigotes étaient sensibles à la curcumine en fonction de la dose et du temps. De plus, le CM11 seul à la concentration de 8 µM ainsi qu'en association avec 10 et 20 µM de curcumine n'a pas eu d'effet significatif sur les promastigotes. Nos résultats ont révélé que la curcumine peut être considérée comme un nouveau candidat curatif contre la leishmaniose cutanée.

Keywords [French]

  • Peptide antimicrobien CM11
  • Curcumine
  • Glucantime
  • Leishmania major
  • Promastigote
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