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Antiparasitic potential of Indian honey bee glue against strains of Leishmania donovani sensitive and resistant to synthetic antileishmanial

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Abstract

Honey bee glue (HBG) or propolis is produced by honey bees and used as cementing material for sealing within the hive which is considered as a waste by the beekeepers. Due to its umpteen biological properties, it is having the potential for drug development against infectious diseases. The management of leishmaniasis relied wholly on injectable chemotherapeutic agents with a lengthy regimen and no vaccine is available. Moreover, the growing drug resistance alarming the entire community about the upcoming menace. Hence, it is of utmost importance to discover and explore new compounds against Leishmania infection, which are effective, safe, and cheaper. The present study was aimed to evaluate the efficacy of Indian honey bee glue (HBG), a natural, resinous by-product of the apiculture industry against the promastigote and amastigote forms of the sensitive and resistant strains of Leishmania donovani. HBG was characterized through GC-MS screening and phytochemical (qualitative and quantitative) analysis was done. In vitro (anti-promastigote) and ex vivo (anti-amastigote) activities against sensitive and resistant strains of L. donovani were assessed. Cytotoxicity, ROS (reactive oxygen species) generation, cell membrane integrity, and cell cycle analysis were evaluated. Chemical characterization by GC-MS revealed the presence of different biologically active components in honey bee glue (HBG). Our results showed the activity of HBG with an IC50 of 27.95 ± 1.53 μg/mL and 29.43 ± 1.54 μg/mL against the sensitive and resistant L. donovani promastigotes respectively. An IC50 of 20.93 ± 1.35 μg/mL and 20.22 ± 1.53 μg/mL was observed against the sensitive and resistant amastigotes of L. donovani. Moreover, the cytotoxicity test against the human cell line showed a CC50 value of 811.30 ± 73.44 μg/mL. In addition to this, it enhanced the ROS production and oxidative stress exhibited by the altered levels of lipid peroxidation, superoxide radicals, lipid bodies, and cell membrane integrity within the parasitic cells and mediated their killing by arresting the DNA in the sub-G0/G1 phase of the cell cycle. The antiparasitic action together with GC-MS data revealed the importance of this by-product from the apiary industry. Therefore, HBG can be a good option to develop a new drug molecule against the deadly infection of Leishmania eventually.

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Abbreviations

HBG:

Honey bee glue

SSG:

Sodium stibogluconate

L. donovani :

Leishmania donovani

RPMI:

Roswell Park Memorial Institute

DMSO:

Dimethyl sulfoxide

PBS:

Phosphate-buffered saline

GC-MS:

Gas chromatography-mass spectrometry

ROS:

Reactive oxygen species

VL:

Visceral leishmaniasis

IC50 :

Inhibitory concentration (50%)

CC50 :

Cytotoxic concentration (50%)

SI:

Selectivity index

B.O.D:

Biological oxygen demand

h:

Hour

min:

Minutes

mL:

Millilitres

μL:

Micro litres

Abs:

Absorbance

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Acknowledgments

The authors are thankful to the DST-CSIC, Post Graduate Institute of Medical Education and Research, Chandigarh for providing instrumentation facility. Sophisticated Analytical Instrument Facilities (SAIF)/ Central Instrumentation Laboratory (CIL), Panjab University, Chandigarh is acknowledged for GC-MS analysis.

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All data generated during this study are included in this article.

Funding

This work was financially supported by University Grants Commission, New Delhi under the grants, UGC-BSR JRF/SRF Fellowship [F.No.25–1/2014–15(BSR)/7–150/2007(BSR)], UGC-JRF/SRF Fellowship (3643/NET-DEC.2012) and Department of Science and Technology, GOI, New Delhi under the grant DST-FIST (SR/FST/LSI-545/2012(C)).

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DKG and PK carried out the experimental work and wrote the manuscript. DKG, PK, and SK designed the study. SK supervised the experimental study and reviewed the manuscript. All authors read and approved the final manuscript.

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Correspondence to Sukhbir Kaur.

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The authors hereby declare that they have no conflicts of interest.

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Goyal, D.K., Keshav, P. & Kaur, S. Antiparasitic potential of Indian honey bee glue against strains of Leishmania donovani sensitive and resistant to synthetic antileishmanial. Biologia 76, 3841–3854 (2021). https://doi.org/10.1007/s11756-021-00897-5

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