In vitro Antifungal, Antioxidant and Cytotoxic Activities of a Partially Purified Protein Fraction from Atlantia monophylla Linn (Rutaceae) Leaf
Purpose: To determine the in vitro antifungal and antioxidant activities of the aqueous extract and protein fraction of Atlantia monophylla Linn (Rutaceae) leaf.
Methods: Ammonium sulphate (0 – 80 %) precipitation method was used to extract protein from the leaves of A. monophylla Linn (Rutaceae). In vitro antifungal assays were performed by disc-diffusion and micro-broth dilution methods. 2,2-Diphenyl-1-picrylhydrazyl (DPPH), hydrogen peroxide (H2O2), superoxide and 2,2′-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging activities were performed to evaluate in vitro antioxidant activities. Sodium dodecyl sulfatepolyacrylamide gel electrophoresis (SDS-PAGE) was employed to assess the molecular weight of the protein fractions. Protein concentration was determined by Bradford method. The cytotoxicity of these extracts was tested on Vero cell lines.
Results: Both the aqueous extract and protein fraction (AMP III) of Atlantia monophylla leaf exhibited higher antifungal activity on Candida albicans than on Aspergillus fumigatus. AMP III fraction showed greater in vitro antioxidant activity than the aqueous extract. SDS-PAGE analyses revealed the presence of two protein bands with molecular weight approximately of 16 and 67 KDa in AMP III. Protein concentration was 240 μg/ml in the aqueous extract and 670 μg/ml in AMP III fraction. The aqueous extract and protein fraction exhibited cytotoxicity at concentrations > 100 μg/ml on Vero cells.
Conclusion: Plant-derived proteins/peptides possessing antifungal and antioxidant properties would be a good alternative preparation for the treatment of infectious diseases.
Keywords: Atlantia monophylla, Antifungal, Antioxidant, Cytotoxicity, Proteins/peptides, Vero cell lines
Submission of a manuscript to this journal is a representation that the manuscript has not been published previously and is not under consideration for publication elsewhere.
All authors named in each manuscript would be required to sign a form (to be supplied by the Editor) so that they may retain their copyright in the article but to assign to us (the Publishers) and its licensees in perpetuity, in all forms, formats and media (whether known or created in the future) to (i) publish, reproduce, distribute, display and store the contribution, (ii) translate the contribution into other languages, create adaptations, reprints, include within collections and create summaries, extracts and/or abstracts of the contribution, (iii) create any other derivative works(s) based on the contribution, (iv) to exploit all subsidiary rights in the contribution, (v) the inclusion of electronic links from the contribution to third party material where-ever it may be located, and (vi) license any thrid party to do any or all of the above.