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Ethnobotanical, Phytochemical and Pharmacological Aspects of Daphne Mucronata (Thymeleaceae)

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Ethnobotanical, Phytochemical and Pharmacological Aspects of Daphne Mucronata (Thymeleaceae) Zaidi et al Tropical Journal of Pharmaceutical Research August 2015; 14 (8): 1517-1523 ISSN: 1596-5996 (print); 1596-9827 (electronic) © Pharmacotherapy Group, Faculty of Pharmacy, University of Benin, Benin City, 300001 Nigeria. All rights reserved. Available online at http://www.tjpr.org http://dx.doi.org/10.4314/tjpr.v14i8.27 Review Article Ethnobotanical, Phytochemical and Pharmacological Aspects of Daphne mucronata (Thymeleaceae) Asma Zaidi1*, Syed Majid Bukhari1, Farhan A Khan1, Tayyaba Noor2 and Naseem Iqbal3 1Department of Chemistry, COMSATS Institute of Information Technology, Abbottabad-22060, KPK, 2School of Chemical and Material Engineering, 3USAID Funded Center for Advanced Studies in Energy at NUST, National University of Science and Technology, Islamabad-44000, Pakistan *For correspondence: Email: [email protected]; Tel: +92 337 716 9261; Fax: +92 992 383441 Received: 4 March 2015 Revised accepted: 26 June 2015 Abstract Daphne mucronata is a shrub well known as a medicinal plant in different regions of Asia. Ethnobotanical, phytochemical and pharmacological studies have revealed strong anti-cancer potential of the plant. Literature reports the evaluation of the initial bioactivity profile and extraction of the plant followed by different chromatographic techniques to obtain fractions. As an outcome, isolation and identification of coumarins, flavonoids, triterpenoids, lignin cumarinolignans, glucosides, daphnecin, aquillochin, daphnine and umbelliferone from the plant have been reported. Of these compounds, a diterpene, named gnidilatimonoein, has shown promising anticancer potency in in vitro tests on various cancer cell lines. This review article is an effort to summarize literature published in recent years on the bioactivity of Daphne mucronata. Keywords: Thymelaeaceae, Daphne mucronata, Diterpene, Gnidilatimonoein, Anti-cancer, Bioactivity Tropical Journal of Pharmaceutical Research is indexed by Science Citation Index (SciSearch), Scopus, International Pharmaceutical Abstract, Chemical Abstracts, Embase, Index Copernicus, EBSCO, African Index Medicus, JournalSeek, Journal Citation Reports/Science Edition, Directory of Open Access Journals (DOAJ), African Journal Online, Bioline International, Open-J-Gate and Pharmacy Abstracts INTRODUCTION distributed in Northern areas of Pakistan as well as in several regions of Iran and is considered as Ethnobotany is the principal approach to an important medicinal plant in these areas; it is investigate natural resource management of well known for its ethno pharmacological native society. It is a science of human synergy importance and has been employed in with plants and ecosystem [1]. To relieve conventional medication for the treatment of discomfort, disease or pain, people generally use various diseases [1-8]. The common names of those plants which are repeatedly emphasized the plant are presented in Table 1. by informants as a possible cure for the particular illness compared to other plants which are less Generally, its flowering period is from April to known. May, life cycle is perennial and habitat is woodland [3,8,9]. Daphne mucronata is used as Thymelaeaceae family constitutes of 50 genera a remedy for skeleto-muscular problems and 900 species that are mostly impound Asia, whereas its fruit and leaves mash dressing is Africa and Australia. It is typified in Pakistan by 5 used against rheumatism [3,5,9]. Its liniment is genera and 7 species [2]. Daphne mucronata is a effective in treating infectious wounds, the plant wild shrub of the Thymelaeaceae family and is material is ground and mixed with water to Trop J Pharm Res, August 2015; 14(8): 1517 Zaidi et al prepare the paste; moreover, a pain relieving relieve eye pain [8]. The non-medicinal uses of effect has been observed when weary muscles Daphne mucronata include boiling of dried are either exposed directly to the smoke of branches in water to produce yellow color which branches or steam of its water extract; its is used for leather dyeing; flowers are decoction and cooked leaves are employed for ornamental; wood is used as fuel and to make curing women infertility, gynecological problems, gunpowder charcoal [5,7]. infections, menstruation disorders and constipation [7]. Isolation, extraction and phytochemical analysis Table 1: Common names of Daphne mucronata in different languages Methanol extract of shade dried Daphne mucronata was dried and dissolved in water and Name Language Reference extracted with regular solvents including n- Toye Elam [8] hexane, chloroform, n-butanol, water and ethyl Alef Kurdish Lovomekeen Chitrali [4] acetate by Rasool et al [2]. The column and flash Khoshak chromatography of ethyl acetate fraction eluted Kheshk Persian [7] with chloroform/methanol mixture (with Khesht-e-garmsiri increasing methanol concentration) was Daphne English [8] reported. This resulted in six fractions. Further Laighonai Pashto [1,3,9] column chromatography of these fractions resulted in the isolation of thirteen compounds The fruit of Daphne mucronata is edible and its which are presented in Table 2 [2,10-12]. fruit poultice is used for treating pimples and freckles on face. Although its leaves are Daphne comprises diverse range of biologically poisonous for animals, but they are bearable by active natural products including coumarins goats, therefore, the laniment of leaves is applied [13,14], flavonoids [13,15,16], triterpenoids [13], to cure abscesses in goats. Bark of the plant is lignin [17] and cumarinolignans [2,18]. used to cure disease of bones and for washing Glucosides, daphnecin, coumarin, aquillochin, hair [4,6]. Plant extract is considered good for daphnine and umbelliferone are among the curing skin related diseases and allergies [1,6]. important constituents of Daphne mucronata Its wood is finely ground to make powder (Table 2) [1,11]. (surmeh) which is either applied directly with the help of a wooden stick or mixed with rose water, and is also used as an eyeliner to clean eyes and Table 2: Classes and structures of compounds isolated from Daphne mucronata [2,10-12] Sr. Class Structure Name No. 7,8- Dimethoxycoumarin 1 Coumarins 7,8- Dihydroxycoumarin 2 Carboxylic acids Cinnamic acid 5,7,3ꞌ,4ꞌ- 3 Flavanoids Tetrahydroxyflavone Trop J Pharm Res, August 2015; 14(8): 1518 Zaidi et al 5,3ꞌ,4ꞌ- Trihydroxyflavone 7- O-β-D- Glucopyronaside 5,6,7,8,3ꞌ,4ꞌ- Hexamethoxyflavone 5-Hydroxy-3,6,7,4ꞌ- Tetrahydroxyflavone Lupeol Betulin 4 Triterpenoids Β-Amyrin Stigmasterol 3-O-β- 5 Sterols D-Glucopyranoside 6 Coumarinolignin Daphnecin Trop J Pharm Res, August 2015; 14(8): 1519 Zaidi et al 7 Diterpene Gnidilatimonoein Pharmacological aspects µg/mL); this association of root extract with low and leaf extract with high toxicity was verified by Thymelaeaceae family is often documented as brine shrimp test. However, no part of the plant pharmacologic agent such as anti-leukemia [19], has been stated to show anti-fungal activity [32]. anti-tumor [20], abortifacient [21], anti-gout [22], Several species of Daphne possess anti- anti-inflammatory [23], anti-microbial [24], nucleic leukemia activity and have been used for this acid inhibitor [25], against breast purpose since long [13,21,33,34]. adenocarcinoma [26] and cell adhesion inhibitor in folk medicines. To evaluate the Moreover, ethanolic extract of Daphne pharmacological behavior of Daphne mucronata, mucronata holds breast anti-cancer potential; it has been reported that the compounds 1 to 11 during in vivo studies, this anti-cancer behavior (table 2) isolated from plant extract were was evaluated by first introducing breast tumor in subjected to 1, 1-diphenyl-2-picryl-hydrazil rats with 5 mg administration of 9, 10-Dimethyl-1, (DPPH) assay. The reported IC50 values 2-benzanthracene (DMBA) two times per week presented in Table 3 show the anti-oxidant for one month, subsequently, the rat was orally potential of these compounds [2]. administrated with 50 % ethanolic plant extract for 20 days and a significant reduction in Table 3: The IC50 values of compounds isolated from diameter of breast tumor has been reported [26] Daphne mucronata against standard in DPPH assay whereas complete tumor elimination was reported with long term dosage of the ethanolic Compounds IC (µM/mL)± SEM.* 50 plant extract [35]. The ethanolic extract of 1 314.125 ± 1.047 Daphne mucronata leaves has cytotoxicity and 2 Inactive anti-tumor activity against K562 and CCRF-CEM 3 341.023± 0.349 human leukemia cell lines. The reported LC 4 257.853 ± 0.258 50 5 296.854 ± 1.258 values of Daphne mucronata extract based on 6 356.012 ± 1.023 shrimp test are 0.062 mg/L for plant leaves and 7 324.156 ± 2.035 0.3 mg/L for plant stem [36]. It has been reported 8 370.015±2.125 that Daphne mucronata extract shows a 9 Inactive decrease in cell viability on leukemia cell lines by 10 Inactive a factor of four whereas the plant extract 11 Inactive Standard BHA ± 44.0 concentration required a half reduction in cell *SEM = standard error mean taken from triplicate number as expressed in Table 4. experiments Taxol is a natural antineoplastic agent which has Literature reveals that the bioactive components the tendency to down regulate tumor necrosis from genus Daphne reside in roots, stem or factor alpha (TNF-α) receptor and stimulate its leaves of the plant [21,27-31]. The ethanolic release in isolated human monocytes. Daphne extract of leaves, stem and roots of Daphne mucronata extract has the tendency to increase mucronata have been reported to possess anti- the release of TNF-α and down
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