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Enhanced cytotoxic effect on human lung carcinoma cell line(A549) by gold nanoparticles synthesized from Justicia adhatoda leaf extract

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Asian Pacific Journal of Tropical Biomedicine 2018年第11期8卷 540-547页

作者： D.Latha P.Prabu C.Arulvasu R.ManikANDan s.sampurnam V.Narayanan Department of Inorganic Chemistry University of Madras Guindy Campus Department of Zoology Pachaiyappa's College for Men Kanchipuram Department of Zoology University of Madras Guindy Campus Chennai

Objective: To synthesize bio-inspired gold nanoparticles(AuNPs) using the leaf extract of Justicia adhatoda and evaluate the anti-cancer activity on human lung cancer cell line(A549).Methods: synthesis of AuNPs was done using an aqueous leaf extract of Justicia adhatoda as a green route. The bio-synthesized AuNPs were confirmed and characterized by using various spectral studies such as UV-Vis spectrum, scanning Electron Microscope with EDAX, Transmission Electron Microscope, Fourier Transmission Infrared spectroscope analysis and surface Enhanced Raman spectroscopy. The cell viability was determined by MTT reduction assay. In addition, cytomorphology and the nuclear morphological study of A549 cell line was observed under fluorescence microscope. Results: UV-Vis spectrum showed surface plasmon resonance peak at 547 nm, scanning electron microscope and transmission electron microscope studies showed the monodispersed spherical shape and its average size in the range of 40.1 nm was noticed. Fourier Transmission Infrared spectroscope analysis confirmed that the C=O group of amino acids of proteins had strong ability to bind with the surface of nanoparticle. Interestingly, our results also demonstrated inhibited proliferation of A549 cell line by MTT(IC50 value: 80 μg/mL). Cell morphology was observed and cell death was caused by apoptosis as revealed by propidium iodide staining. Conclusions: The current study proves the anticancer potential of bio-synthesized AuNPs. Thus, synthesized AuNPs can be used for the treatment of human lung cancer cell(A549) and it can be exploited for drug delivery in future.

关键词： Justicia adhatoda Leaf extract AuNPs Cytotoxicity A549 cell line

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