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In Vitro Anti-Oxidant Assay, HPLC Profiling of Polyphenolic Compounds, AAS and FTIR Spectrum of Malaysian Origin Solanum Torvum Fruit

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In Vitro Anti-Oxidant Assay, HPLC Profiling of Polyphenolic Compounds, AAS and FTIR Spectrum of Malaysian Origin Solanum Torvum Fruit Pharmaceutical Research In vitro Anti-oxidant Assay, HPLC Profiling of Polyphenolic Compounds, AAS and FTIR Spectrum of Malaysian Origin Solanum torvum Fruit Sathyanarayana Namani1, Sunitha Paripelli2, Suresh V Chinni3, Marimuthu Kasi3, Sreeramanan Subramaniam4, Xavier Rathinam3 1|Department of Anatomy, Faculty of Medicine, AIMST University, Semeling, Bedong, MALAYSIA. 2Department of Physiology, Faculty of Medicine, AIMST University, Semeling, Bedong, MALAYSIA. 3Department of Biotechnology, Faculty of Applied Sciences, AIMST University, Semeling, Bedong, MALAYSIA. 4School of Biological Sciences, Universiti Sains Malaysia, 11800 Georgetown, Penang, MALAYSIA. ABSTRACT Objective: Solanum torvum swartz, a Solanaceae family plant is used by traditional systems of medicine. The aim of this study is to determine the phytochemical content and antioxidant potential of the fruits of Solanum torvum of Malaysian origin. Method: A preliminary phytochemical screening was carried out for the analysis of important phytochemicals present in Solanum torvum Fruit. Anti-oxidant potential of S. torvum Fruit was evaluated by various scavenging models including DPPH, FRAP and HPLC method used for Identification of polyphenolic compounds. Elemental analysis and Functional group analysis were done by Atomic absorption spectrophotometer (AAS) and Fourier Transform Infrared Spectrophotometer (FTIR) methods respectively. Results: Phytochemical screening was done for the aqueous, ethanolic and methanolic extracts of S. torvum. Quantitative assessment of total phenols and flavonoid content, DPPH and FRAP assay was done in the ethanolic extracts of S. torvum. Qualitative analysis of each extract showed the presence of reducing sugars, saponins, alkaloids, phenols and flavonoids except anthraquinones. Quantitative determination of total phenols and flavonoids in STE showed 16.4 mg GAE/g extract of S. torvum and 2.8 mg QE/g extract of S. torvum respectively. In DPPH radical scavenging assay, the IC50 value of the extract was found to be 1.62 mg/ml and in FRAP assay, FRAP value of ethanolic fruit extract was found to be 470 mg FeSO4 E/gr of S. torvum fruit extract. Extract analyzed by High performance liquid chromatography revealed presence of polyphenolic compounds such as gallic acid, rutin, quercetin and ascorbic acid. Elemental determination by Atomic absorption spectrophotometer (AAS) showed the presence of essential elements. Fourier Transform Infrared Spectrophotometer (FTIR) report shows the presence stretching vibrations of OH groups in phenyl, CH2 asymmetric stretch of methyl groups, C-O stretching vibrations ring of phenyls, CH bending vibration. Based on the above obtained data, it can be concluded that fruits are a rich source of antioxidants. Conclusion: S. torvum a local Malaysian medicinal plant fruit ethanolic extract possesses good amount of phenols and flavonoids responsible for the antioxidant property. Key words: Polyphenolic compounds, Antioxidant property, HPLC, AAS, FTIR. INTRODUCTION The genus solanum family comprises of Submission Date : 04-07-2015 1500 species. Botanical classification of Revised Date : 01-09-2015 Solanum torvum. Kingdom: Plantae, Division: Accepted Date : 16-02-2016 Magnoliophyta, Class: Magnoliopsida, Order: DOI: 10.5530/ijper.50.2.13 Solanales, Family: Solanaceae, Genus: Sola- Correspondence Address num, Species: Solanum torvum sw. It is a small Dr. Namani Satyanarayana, Department of Anatomy, shrub widely distributed in Malaysia. In Faculty of Medicine, AIMST University, Malay it is also known as terong belanda, Semeling, Bedong, terong perak, terong pokok, terong puyoh, MALAYSIA. Ph no: 016-4542155 www.ijper.org terong rapok. It is known as Turkey berry, E-mail: [email protected] Indian Journal of Pharmaceutical Education and Research | Vol 50 | Issue 2 (Suppl.)| Apr-Jun, 2016 S11 Satyanarayana et al.: Anti-oxidant assays, HPLC profiling of Malaysian origin Solanum torvum fruit Egg plant or Devils figure, West Indian Turkey Berry in MATERIALS AND METHODS English, Sanskrit: Brihati, Marathi: Marang, Hindi: Bhurat, Collection of Plant Material Bhankatiya, Folk Ran: Baingan, goth-begun, Kaatuc- hunta in Malayalam and Sundaikkai in Tamil.1 S. torvum fruits were collected during the month of March and April from the Bedong, Sungai Petani, Its edible fruits are considered as an essential ingredient Kedah, Malaysia. The collected fruits were authenti- in Malay and Thai cuisine. People of Tamilnadu use this cated by Botanist Dr. Xavier. The voucher specimens fruit of S. torvum in their daily diet. It is a plant which is were deposited in herbarium, Department of faculty found all over the Indian subcontinent and West Indies, of medicine, AIMST University, Malaysia for future Bermuda, Indonesia, Malaya, China, Philippines and refer ence. The work was carried out in the Department 2-5 tropical America. of Biotechnology and Faculty of Medicine Multi disci- The pericap of the fruit contains high amount of phe- plinary lab. nolic and flavonoid compounds that are the secondary The fruits were washed with distilled water and dried metabolites of the plant. So the fruits and leaves of under shade, mechanically pounded to get coarse pow- S. torvum are widely used in Cameroonian folk medicine. der and passed through number 40 sieve meshes. The A decoction of fruits useful for cough ailments and in sample powders were processed in such a way that they 6,7 cases of liver and spleen enlargement. are useful for phytochemical studies. It is used as a sedative and diuretic. The leaves and ripened fruits are used for as a haemopoietic and hae- Chemicals mostatic agents.8 It is used worldwide in the traditional Quercetin, Aluminium chloride, Diphenyl picryl hydra- systems of medicine as poison anti-dote, for the treatment zine (DPPH), Trichloroacetic acid (TCA) and FeCl3. of fever, wounds, tooth decay, reproductive problems and DPPH was obtained from Hi media laboratories Pvt. arterial hypertension.9 Ltd. Mumbai. Aluminium chloride, TCA, FeCl3 were Biological properties of fruits include properties like obtained from Merck, Mumbai, India; Quercetin was Antimicrobial,10-13 Anti-viral,14 Immuno-secretory,15 obtained from Sisco research laboratories Pvt. Ltd. Anti-oxidant,16 Analgesic and Anti-ulcerogenicac- (SRL) Mumbai, India. 17 18 19 tivities, Cardioprotective, Nephroprotective, Preparation of extract Anti-diabetic,20 Angiotensin and Serotonin receptor Shade dried fruits of S. torvum were finely powdered blocking activities.21 The natural antioxidant proper- with a blender and used for the preparation of aqueous, ties of the plant depend on the total phenols and fla- methanolic and ethanolic extracts. The aqueous extract vonoids content. Geographic location of plant, age was prepared by cold maceration process for a period of the plant, season, associated micro flora, nutri- of 72 h with occasional stirring. Then the mixture tional status, and environmental stress determines the was filtered and the filtrate was collected and the solvent production of natural antioxidants of particular plant was removed under reduced pressure. Ethanolic and species.9 methanolic extracts were prepared by maceration process An antioxidant is a molecule capable of preventing and concentrated using rotary evaporator. The extracts the oxidation of free radicals. Oxidation is a chemical were dried under fume hood. reaction that transfers electrons from a substance to an oxidizing agent. Oxidation reactions can produce Phytochemical screening free radicals, which start chain reactions that damage The aqueous, ethanolic and methanolic extracts of cells. Antioxidants terminate these chain reactions by S. torvum fruits were screened for the presence of phyto- removing free radicals and free radical intermediates; chemical constituents, reducing sugars, saponins, alka- inhibit other oxidation reactions by being oxidized loids, anthraquinones, phenols and flavonoids using themselves. As a result, antioxidants are often reducing standard method.10-13 agents.10 Scientists and Nutritionists encouraged the use of Determination of total phenols antioxidants as food supplements in order to prevent Principle diseases due to oxidative stress and to maintain good Folin-Ciocalteu reagent is formed from a mixture of health. Hence, the present study is focused to evaluate phosphotungstic acid (H3PW12O40) and phosphomo- the phytochemical contents and antioxidant activity of lybdic acid ( H3PMo12O40) which, after oxidation of the fruits of S. torvum of Malaysian origin. the phenols, is reduced to a mixture of blue oxides of S12 Indian Journal of Pharmaceutical Education and Research | Vol 50 | Issue 2 (Suppl.)| Apr-Jun, 2016 Satyanarayana et al.: Anti-oxidant assays, HPLC profiling of Malaysian origin Solanum torvum fruit tungsten( W8O23) and molybdenum( Mo8O23). The blue Method color produced is proportional to the total quantity of In vitro DPPH radical scavenging activity of S. torvum, phenolic compounds originally present. fruits extract was carried out by slightly modified method Method of Blois (1958).The antioxidant activity was determined by 2, 2-diphenyl-1-picrylhydrazyl (DPPH) assay.24 The Total phenolic content in the S. torvum fruit extract DPPH (Diphenyl–picryl-hydrazyl) is a stable free radical was determined using the Folin-Ciocalteu method as and is widely used to assess the radical scavenging activity described by Singleton et al. (1999) with slight modifica- of anti-oxidant compounds. The reaction mixture (3.0 ml) tions. Briefly, different
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