Ethnopharmacological Importance of Xylopia Aethiopica (DUNAL) A
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British Journal of Pharmaceutical Research 11(1): 1-21, 2016, Article no.BJPR.24746 ISSN: 2231-2919, NLM ID: 101631759 SCIENCEDOMAIN international www.sciencedomain.org Ethnopharmacological Importance of Xylopia aethiopica (DUNAL) A. RICH (Annonaceae) - A Review John Peter Fetse 1* , William Kofie 1 and Reimmel Kwame Adosraku 1 1Department of Pharmaceutical Chemistry, Faculty of Pharmacy, College of Health Sciences, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana. Authors’ contributions This work was carried out in collaboration between all authors. Authors WK and RKA designed the study. Author JPF managed the literature searches and wrote the first draft of the manuscript. Authors WK and RKA proof read the manuscript. All authors read and approved the final manuscript. Article Information DOI: 10.9734/BJPR/2016/24746 Editor(s): (1) Partha Krishnamurthy, Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, USA. Reviewers: (1) Luiz Everson da Silva, Federal University of Paraná, Brazil. (2) Ana Carolina Oliveira da Silva, FACHO, Brazil. (3) Saeed S. Alghamdi, Umm Alqura University, Saudi Arabia. Complete Peer review History: http://sciencedomain.org/review-history/13786 Received 30 th January 2016 Accepted 4th March 2016 Review Article Published 21 st March 2016 ABSTRACT Ethnopharmacological Relevance : Xylopia aethiopica or Ethiopian pepper is a plant that thrives in most of the evergreen rain forests of tropical and subtropical Africa, and it is currently grown most prominently in Ghana as a crop. Almost all parts of Xylopia aethiopica possess great medicinal values in traditional medicine. In most parts of Africa, it is used in the treatment of cough, rheumatism, dysentery, malaria, uterine fibroid, boils, and wounds among others. This review summarizes published data on phytochemistry, toxicological properties, Ethnopharmacological and other uses of Xylopia aethiopica , and aims at providing an up-to-date detail that should constitute baseline information for future research on the plant. Materials and Methods: Google Scholar, Scifinder® and PubMed were the electronic databases used to search for and filter published research on Xylopia aethiopica . Results: The various parts of Xylopia aethiopica possess a wide diversity of phytochemicals. A detailed description of only a few of these phytochemicals i.e. essential oils, alkaloids and _____________________________________________________________________________________________________ *Corresponding author: E-mail: [email protected]; Fetse et al.; BJPR, 11(1): 1-21, 2016; Article no.BJPR.24746 diterpenes is available in published research currently. Extracts and isolates from almost all parts of the plant tends to possess one bioactivity or another that confirms its traditional uses, and have largely shown to be of low toxicity. Conclusion: Xylopia aethiopica has shown to possess potential pharmacological benefits; there is however, the need for further research to be conducted on various extracts and isolates of the plant that showed promise during In vitro and animal studies, to ascertain its potency, safety and efficacy in humans. Keywords: Xylopia aethiopica; xylopic acid; pharmacology; antimicrobial; essential oils; review. 1. INTRODUCTION carpels and are arranged in capitula to form bouquets of 12-20 bacciferous-like capsules [3]. Apart from serving as a source of food, plants Xylopia is a compression from the Greek words invariably remain a major source of medicine in “xylon pikron” which mean "bitter wood". The most parts of the world. This is particularly true second part of the plant's binomial name, about the people of Africa especially those in the aethiopica , refers to its origin, Ethiopia; however, tropical regions of the continent. This may be due currently it grows most prominently as a crop in to the fact that the tropical and subtropical Ghana [4]. The plant has several local names, in regions of Africa alone contain about 45,000 Ghana it is known as ‘hwenteaa’ in Akan, ‘etso’ species of plants with potential medicinal value. in Ewe, ‘so ’ in Ga and ‘samaamdabile’ by the Despite the overabundance, only about 5,000 of Waala people in the Upper West Region. This these plant species have been exploited for plant has played a key role in African traditional medicinal use so far and even much less have medicine for several centuries owing to its wide been investigated for corroboration of the said array therapeutic indications. Xylopia aethiopica therapeutic use and safety. For instance, Fetse is used in the treatment of cough, biliousness, et al. in 2014 [1], showed that total alkaloidal bronchitis, rheumatism, dysentery, malaria, extract of Alstonia boonei root bark possess a uterine fibroid, amenorrhea [5], boils, sores, good wound healing and antimicrobial activity wounds and cuts among others [6]. and Hensel et al. [2] pointed out that the plant cell wall could possibly be a potential source of Typically, studies on Xylopia aethiopica , like pharmacologically active compounds. most medicinal plants have focused on the biological activities of its chemical constituents, Xylopia aethiopica or Ethiopian pepper as it is ethnobotany, pharmacology, and taxonomy. usually called, is an angiosperm belonging to the However, a comprehensive or systematic review family Annonaceae and is among the species on the plant is generally lacking. That that thrive in the evergreen rain forests of tropical notwithstanding, it is worth mentioning that some and subtropical Africa. Xylopia aethiopica attempts have been made in this regard. For matures as a slim, tall tree of approximately 60 instance, Juliani et al. [7] in a review, provided cm in diameter and up to 30 m high with a information on the composition of essential oils, straight stem having a slightly stripped or smooth antioxidant activity, quality control standards, bark. It bears odoriferous fruits, which are and the pharmacological uses of the dried slender pods slightly curved with about 15 fruits of Xylopia aethiopica using the a b c d Fig. 1. (a) Fruits of Xylopia aethiopica still attached to the tree (b) leaves of Xylopia aethiopica (c) a cluster of Xylopia aethiopica fruits and (d) dried fruits of Xylopia aethiopica 2 Fetse et al.; BJPR, 11(1): 1-21, 2016; Article no.BJPR.24746 product of Ghana as an illustrative case study. odoriferous greenish-white flowers with external Clearly, this study focuses mainly on Xylopia petals up to 5 cm long [11]. Xylopia aethiopica is aethiopica fruits from Ghana and as such is cultivated mainly for the fruits, made up of barely comprehensive. Again, the study was clusters of about 30 mericarps, 5 to 6 cm long conducted almost a decade ago and throughout and 0.5 to 0.8 cm wide. For each mericarp there this period, several studies have been carried out are 1 to 9 seeds, which are 5 to 6 mm long and 2 on the plant in various fields of science. to 3 mm wide, covered with a bright brown Consequently, this paper presents information on tegument [10]. In West Africa, the tree flowers but not limited to the morphology, ecology, twice every year (i.e. March-July and October- ethnopharmacology, phytochemistry, biological December) while fruiting occurs in December- activities and toxicological properties of Xylopia March and June-September with harvesting time aethiopica and aims at providing an up-to-date running from February to May and from August detail that should constitute baseline information to October [4]. for future research and commercial exploitation of the plant. 2.3 Ethnobotanical and Other Uses 2. TAXONOMY, CULTIVATION AND Xylopia aethiopica possesses great nutritional ETHNOBOTANICAL USES OF Xylopia and medicinal values in traditional medicine [12]. Almost all parts of Xylopia aethiopica are very aethiopica useful medicinally, but the fruits are most commonly used for therapeutic purposes. 2.1 Taxonomy Extracts of the fruits are used in the treatment of cough, biliousness, bronchitis, rheumatism, The genus Xylopia is consists of about 150 dysentery, malaria, uterine fibroid and species which occur in tropical and subtropical amenorrhea [13,5,14]. The fruits can also be Africa [8]. Xylopia aethiopica , also known as crushed and mixed with Shea butter and used as Negro pepper, is an angiosperm belonging to the body creams, cosmetic products or perfumes custard apple family, Annonaceae [9]. [11]. It has also been showed that the essential oil from the seeds of Xylopia aethiopica can be Kingdom: Plantae used in the formulation of shampoos due to its Subkingdom: Viridiplantae high saponification value (207.2±8.0) [15]. Infrakingdom: Streptophyta (land plants) Conversely, in a preliminary evaluation of the Superdivision: Embryophyta physical and chemical properties of essential oils Division: Tracheophyta (vascular plants) from the seeds Xylopia aethiopica, Ogbonna and Subdivision: Spermatophytina (seed plants) others [16] also determined the saponification Class: Magnoliopsida value of the oil to be 130.18. This value is lower Superorder: Magnolianae than that obtain in the instance described earlier. Order: Magnoliales The geographical location of the plant and the Family: Annonaceae (custard apples) time of harvest could all affect the nature and Genus: Xylopia composition of essential oils in the plant thus Species: Xylopia aethiopica resulting in the differences observed. In Benin, the dried fruits are commonly used as a 2.2 Cultivation constituent of extracts for bathing, and as a potion administered to new-borns [11]. The Xylopia aethiopica grows into a giant tree in most seeds are crushed and applied topically on the of the evergreen rain forests of tropical and forehead in the treatment of headache and subtropical Africa. The plant thrives in humid neuralgia. It can also be taken as a decoction, forest zones of West Africa. It can grow to as concoction or even chewed and swallowed for high as 20 m or even up to 45 m [10]. The stem the management of various aches and pains is generally straight with a smooth or slightly [17]. It has also been shown experimentally, that striped bark and has a diameter of about 60 cm the seeds possess good anthelminthic activity [3].