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Phytochemical and Antimicrobial Properties of Tiliacora Triandra Stem Bark

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Phytochemical and Antimicrobial Properties of Tiliacora Triandra Stem Bark British Journal of Pharmaceutical Research 17(2): 1-9, 2017; Article no.BJPR.34059 ISSN: 2231-2919, NLM ID: 101631759 Phytochemical and Antimicrobial Properties of Tiliacora triandra Stem Bark Md. Mahbubur Rahman 1* , Md. Shamsuzzaman 1, Mahfuza Khatun 1, Md. Mostafijur Rahman 1, A. S. M. Sakhawat Hossain 1, A. H. M. Khurshid Alam 2, Ashik Mosaddik 3 and Mir Imam Ibne Wahed 1,2 1Department of Pharmacy, Varendra University, Rajshahi-6204, Bangladesh. 2Department of Pharmacy, University of Rajshahi, Rajshahi-6205, Bangladesh. 3Department of Clinical Pharmacy, Institute for Research and Medical Consultation, University of Dammam, KSA. Authors’ contributions This work was carried out in collaboration between all authors. Author Md. Mahbubur Rahman designed the study, performed the statistical analysis, wrote the protocol and wrote the first draft of the manuscript. Authors MS and MK managed the analyses of the study. Author Md. Mostafijur Rahman managed the literature searches. All authors read and approved the final manuscript. Article Information DOI: 10.9734/BJPR/2017/34059 Editor(s): (1) A. Lakshmana Rao, V. V. Institute of Pharmaceutical Sciences, Andhra Pradesh, India. Reviewers: (1) Mustapha Umar, Nigerian Institute of Leather and Science Technology, Nigeria. (2) Mostafa Abbas Shalaby, Cairo University, Egypt. (3) Osungunna Michael Oluwole, Obafemi Awolowo University, Nigeria. Complete Peer review History: http://www.sciencedomain.org/review-history/19558 Received 11 th May 2017 th Original Research Article Accepted 10 June 2017 Published 16 th June 2017 ABSTRACT Aim: Tiliacora triandra (T. triandra) , a species of Menispermaceae family, has folkloric reputation for the treatment of several diseases including infectious diseases in Thailand and neighboring countries. The present study aimed at screening the stem bark of T. triandra for its phytochemical constituents and its antimicrobial potential against selected bacteria and fungi. Materials and Methods: The dried stem bark of T. triandra was extracted with methanol and qualitative phytochemical analysis was performed. The antimicrobial activity was determined by disc diffusion assay method against some bacteria and fungi. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined by serial dilution method to establish the antimicrobial potential of the extract. Results: Qualitative phytochemical analysis revealed the presence of phenolics, flavonoids, _____________________________________________________________________________________________________ *Corresponding author: E-mail: [email protected]; Rahman et al.; BJPR, 17(2): 1-9, 2017; Article no.BJPR.34059 terpenoids, alkaloids, saponins and cardiac glycosides. Susceptibility testing by disc diffusion assay showed significant antimicrobial activity against the tested pathogens. The highest antibacterial activity was observed against a Gram-negative bacterium Escherichia coli (E. coli ) where the zones of inhibition were 15 mm and 21 mm at the potencies of 250 and 500 µg/disc, respectively. The stem bark extract also showed moderate activity against Shigella sonnei (14 mm), Shigella dysenteriae (13 mm), Agrobacterium spp (13 mm) bacteria and fungus, Aspergillus niger (14 mm) at 250 µg/disc. The results also revealed equal MIC and MBC values of 62.5ug/mL against E. coli. Conclusions: Our findings revealed that the methanol extract of T. triandra possesses potent antimicrobial activity which may be attributed to the identified phytochemical components of the plant extract. Keywords: Antimicrobial; phytochemical screening; Tiliacora triandra; minimum inhibitory concentration; minimum bactericidal concentration. 1. INTRODUCTION about 61% of new drugs were developed on the basis of natural products, mainly plant source Critical challenges remain in the battle against and they have been very successful, especially infectious diseases in spite of enormous advent in the areas of infectious disease and cancer of most promising healing agent, antibiotics, over [10]. Therefore, researchers have directed their the past few decades. Available evidences efforts at screening and testing the efficacy of revealed that infectious diseases remain the third plants to explore their antimicrobial activity leading cause of death in USA each year and the towards discovery of new leads to develop second leading cause of death worldwide [1]. better drugs against infections caused by Currently, more than 100 kinds of antibiotics microbes. have been discovered and are widely used to cure various infectious diseases caused by Tiliacora triandra (T. triandra ), a member of microbes. Unfortunately, the clinical efficacy of Menispermaceae family, is commonly known as these antibiotics is being threatened due to the Diels or Ya-nang especially in Thailand. It is a emergence of multi-drug resistant (MDR) species of flowering plant native to Southeast pathogens, also known as ‘superbugs’ which Asia and widely distributed in the Northeast of cause antimicrobial resistance [2]. Nowadays, Thailand and Lao PDR [11]. T. triandra is a antimicrobial resistance has been a most climbing plant with deep green leaves and alarming global concern for years and is yellowish flowers. It has long history of use as considered one of the world’s most critical public edible plant in Thai cuisine, especially in bamboo health threats. Rezai and Weinstein, (2010) shoot soup. Ya-nang is used not only as food but reported that over 70% of pathogens found in US also as traditional medicine to treat different hospitals acquired resistance for at least one human diseases such as malaria, fever, cancer antibiotic resulting in mortality of more than etc. Its leaves and root extracts contain high 14,000 patients annually from microbial levels of beta −carotene and minerals and are infections [3]. To overcome antimicrobial often used as traditional medicine in the resistance challenge, it is essential to investigate treatment of fever and cancer [11,12]. new antimicrobial agents with diverse chemical Furthermore, some bisbenzyl isoquinoline structure and novel mechanisms of action for alkaloids, especially tiliacorine, tiliacorinine and new and re-emerging infectious diseases [4]. nor-tiliacorinine have been identified from the Among the potential sources of new agents, root extracts of Ya-nang, which have antifungal, plants have long been investigated. Plants are antioxidant, anticancer and anti-malarial activities rich in secondary plant metabolites [11,13]. Naibaho [14] reported that the essential (phytochemicals), such as tannins, terpenoids, oil isolated from fresh leaves of T. triandra has a alkaloids, flavonoids, phenols and quinines, strong antibacterial activity against both Gram- which have been used globally in traditional positive and Gram-negative bacteria. Although medicine to treat several infectious diseases [5, roots and leaves of T. triandra possesses 6,7]. It has been reported that natural products, biological activities against several diseases, either as pure compounds or as standardized including infectious diseases, little is known plant extracts may give a new source of about the stem barks of T. triandra . Therefore, antimicrobial agents with possibly novel the objective of the present study was to mechanisms of action [8,9]. From 1981 to 2002, evaluate T. triandra stem barks for its 2 Rahman et al.; BJPR, 17(2): 1-9, 2017; Article no.BJPR.34059 antimicrobial activity against selected pathogenic colour. The disappearance of colour after microorganisms. addition of dilute hydrochloride acid showed the presence of flavonoid [18]. 2. MATERIALS AND METHODS 2.3.3 Salkowski’s test for terpenoids 2.1 Plant Collection The extract (50 mg) was added with few mL of Stem barks of T. triandra was collected from chloroform followed by concentrated sulphuric Manda upozilla under Naogaon district, Rajshahi, acid to form a layer. Reddish brown colour at the Bangladesh in July, 2016 and was identified by interface indicated the presence of terpenoids an expert taxonomist at the Department of [19]. Botany, University of Rajshahi, where a voucher specimen (Voucher No. MR-01) was deposited. 2.3.4 Froth test for saponins Plant materials were then washed separately with fresh water to remove dirt and other Each extract (50 mg) was diluted with distilled contaminants, and were shade -dried for 5 to 7 water and made up to 20 mL. The suspension days with occasional sun drying. The dried was shaken in a graduated cylinder for 15 mins. materials were ground into coarse powder by a The development of 2 cm layer of foam indicated grinding machine and the materials were stored the presence of saponins [20]. at room temperature (RT) for future use [15]. 2.3.5 Wagner’s test for alkaloids 2.2 Extract Preparation About 50 mg of extracts was stirred with few mL of dilute hydrochloric acid and filtered. Then, few The extraction was performed according to the drops of Wagner’s reagent were added at the method of Rahman et al. [16]. About 150 g of side of the test tube. The formation of reddish powdered plant materials soaked with 500 mL of brown precipitate showed the presence of 80% methanol in an amber-coloured extraction alkaloids [21]. bottle. The sealed bottles were kept for 15 days with occasional shaking and stirring. The extracts 2.3.6 Keller-Kiliani’s test for cardiac were filtered separately through a fresh cotton glycosides plug and finally with Whatman No.1 filter papers. The filtrates were then concentrated with a rotary A small
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