Irum Jehangir, Syed Farhan Ahmad*, Maryam Jehangir, Anwar Jamal and Momin Khan
Leishmaniasis is the major cause of mortality in under-developed countries. One of the main problems in leishmaniasis is the limited number of drug options, resistance and side effects. Such a situation requires to study the new chemical series with antileishmanial activity. We have applied a integrative approach based on computational and in vitro methods to elucidate the efficacy of different antibacterial and antifungal drugs against Leishmania tropica (KWH23). Firstly these compounds were analyzed using insilico molecular docking. This analysis showed that the nystatin and azithromycin interacted with the active site amino acids of the target protein leishmanolysin. The nystatin, followed by azithromycin, produced the lowest binding energies indicating their inhibitive activity against the target. The efficacy of the docked drugs was further validated invitro which showed that our bioinformatics based predictions completely agreed with experimental results. Stock solutions of drugs, media preparation and parasites cultures were performed according to the standard invitro protocol. We found that the half maximal inhibitory concentration (IC50) value of dosage form of nystatin (10,000,00 U) and pure nystatin was 0.0528 µg/ml and 0.003 µg /ml respectively. The IC50 value of combined azithromycin and nystatin (dosage and pure form) were 0.156 µg/ml and 0.0023 µg /ml respectively. It was observed that IC50 value of nystatin is better than azithromycin and pure form of drugs were having significant activity than dosage form of drugs. From these results it is also proven that pure drugs combination result is much better than all tested drugs results. The results of both in vitro and in silico studies clearly indicated that comparatively, nystatin is the potential candidate drug in combat against Leishmania tropica.
Drugs, Leishmania tropica, Docking, leishmanolysin, IC50, invitro
Khyber Medical University - department of Microbiology Peshawer, KP, Sao Paulo state university, UNESP - Department of morphology Sao Paulo, KP, Sao Paulo state university, UNESP - Department of morphology Sao Paulo, KP, Khyber Medical University - department of Microbiology Peshawer, KP, Khyber Medical University - department of Microbiology Peshawer, KP