Functional foods from Quercus infectoria galls and their bioactivities

Sulaiman, Fatimatul Akmal and Mohamed Iqbal, Mohammad Anwar and Darnis, Deny Susanti and Adam, Farook and Bakhtiar, M. Taher (2018) Functional foods from Quercus infectoria galls and their bioactivities. In: 34th International Conference on Natural Products (ICNP 2018), 19th-21st March 2018, Pulau Pinang. (Unpublished)

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Abstract

Plant has antimicrobial properties as the extract is used in food industry, pharmaceuticals and alternative medicine. The aims of this study were to isolate metabolites from Quercus infectoria galls and to determine the antimicrobial and antioxidant properties of extracts and isolated compounds. The galls were extracted using soxhlet apparatus with n-hexane (HEX), dichloromethane (DCM) and methanol (MeOH), successively. The crude extracts were fractionated and separated using chromatographic techniques on silica gel. The isolated compounds were characterized using spectroscopic techniques. The antimicrobial activities were determined using disc diffusion method. The antioxidant activities were determined DPPH free radical scavenging activity and β-carotene bleaching assay. The cytotoxicity of isolated compounds was tested on MCF-7 using MTT assay. Methyl gallate (QIM 1) and gallic acid (QIM 2) were isolated from MeOH extract. The extracts and isolated compounds showed antimicrobial activities against Staphylococcus aureus, Bacillus cereus, Pseudomonas aeruginosa, Escherichia coli Candida albicans, Candida krusei and Aspergillus niger ATCC16404. In β-carotene bleaching assay, QIM 1 and QIM 2 exhibited 67 % and 66 % antioxidant activity. The present study revealed that isolated compounds showed potential as antioxidant agent and had cytotoxic effect on MCF-7. Meanwhile, the compound QIM 2 had antimicrobial properties and synergistic effect with chloramphenicol.

Item Type:	Conference or Workshop Item (Poster)
Additional Information:	5641/65955
Uncontrolled Keywords:	Quercus infectoria; isolation; antimicrobial; antioxidant; cytotoxicity
Subjects:	Q Science > QD Chemistry
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Chemistry Kulliyyah of Pharmacy Kulliyyah of Pharmacy > Department of Pharmaceutical Technology Kulliyyah of Science
Depositing User:	Dr Deny Susanti Darnis
Date Deposited:	26 Sep 2018 11:43
Last Modified:	26 Sep 2018 11:43
URI:	http://irep.iium.edu.my/id/eprint/65955

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