Occurrence of Terpenes, Polyketides, and Tannins in Some Japanese Lichens and Green Mosses Waill A
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[Downloaded free from http://www.epj.eg.net on Tuesday, January 26, 2021, IP: 158.232.3.16] 216 Review article Occurrence of terpenes, polyketides, and tannins in some Japanese lichens and green mosses Waill A. Elkhateeb, Ghoson M. Daba Department of Chemistry of Natural and Terpenes, polyketides, and tannins are valuable chemical classes that are famous Microbial Products, Pharmaceutical Industries for their varied biological activities such as being antioxidant, anticancer, Researches Division, National Research Centre, El Buhouth Street, Dokki, Giza, Egypt antibiotic, and immunosuppressant agents. On the other hand, lichens and mosses are rich sources of biologically active compounds. However, rare Correspondence to Waill A. Elkhateeb, PhD, studies have described neither the chemical analyses nor the biological Department of Chemistry of Natural and Microbial Products, Pharmaceutical Industries activities of such samples. In this review, the chemical constitutions of five Researches Division, National Research Japanese originated lichens and moss samples belonging to the species Centre, El Buhouth Street, Dokki 12311, Giza, Candelariella vitellina, Lepraria incana, Dirinaria applanata, Brachythecium Egypt. Tel: (+20)1013241936; fax: (+20) 233 velutinum, and Brachythecium rutabulum were described with focus on three 387 758; E-mail: [email protected] chemical classes which are terpenes such as Dechloromycorrhizin A, Hericenone A, demethoxyviridin, Scytalidic acid, Ovellin B, Ceriporic acid B, Ganodermatriol, Received: 27 March 2020 Fomefficinic acid A, Ganoderol A, Ganoderol F; polyketides such as Revised: 19 April 2020 Accepted: 2 June 2020 Chaetoquadrin A, Comazaphilone C, Hormothamnione, Arnottianamide, Published: 24 August 2020 Avermutin, 4′-Hydroxyphlebiarubrone, 4′-Hydroxyphlebiarubrone, Citropone A, Atrovenetin; and finally secondary metabolites (tannins) such as 5′ Egyptian Pharmaceutical Journal 2020, ′ ′ 19:216–223 methoxydehydrodiconiferyl alcohol, ellagic acid 3,3 -di-O-methyl ether, 5,5 - dehydrodiferulic acid, 3,3′,4-tri-O-methylellagic acid, and 5′- methoxydehydrodiconiferyl alcohol. Keywords: Brachythecium velutinum, Candelariella vitellina, Dirinaria applanata, Lepraria incana, Brachythecium rutabulum, terpenes, polyketides, tannins, biological activities Egypt Pharmaceut J 19:216–223 © 2020 Egyptian Pharmaceutical Journal 1687-4315 stomach disorders, vomiting, treating wounds, and Introduction skin disorders [1,8,9]. Lichens metabolites (also Lichens are symbiotic associations of fungi with known as lichen substances) are either primary or microalgae and/or cyanobacteria, which are secondary metabolites [8,9]. Primary metabolites are considered among the slowest growing organisms, required for the growth and maintenance of cells, and with strong tolerance to adverse environmental those metabolites include amino acids, proteins, conditions [1]. Lichens are a valuable source of polyols, polysaccharides, vitamins, and carotenoids. many natural classes with varying biological On the other hand, lichen secondary metabolites do potentials including antiviral, antifungal, analgesic, not contribute in growth, development, or antipyretic, antioxidant, and anticancer effects [2,3]. reproduction but they are usually derived from The potential of lichens for the monitoring of primary metabolism [2,5,8]. radionuclides has been well documented [4,5]. Lichens can grow on rocks and exist as epiphytes on Candelariella trees and leaves [6]. Most of the lichens are terrestrial Candelariella (known as crustose lichen) is a well- and few are marine with the ability to adapt water and known and commonly occurring genus, growing on saline stress, extreme temperature, and air pollutants many types of substrates, particularly in exposed and [7] Lichens produce a wide array of biologically active nitrogen-enriched regions. The most prominent primary (intracellular) and secondary (extracellular) components of the lichen flora are from species metabolites (Fig. 1). More than1000 metabolites belonging to the genus Candelariella on road-side were extracted from lichens, some of these trees, limestone rocks, and in alpine, terricolous compounds are exclusively produced by lichens, habitats. However, the knowledge of the distribution while others were commonly observed in fungal and ecology of individual species is still poor for many extracts and those of higher plants [3,5]. In recent times, lichens and their secondary metabolites have been getting increased attention due to their nutritional This is an open access journal, and articles are distributed under the terms value and pharmaceutical potential; lichens are used in of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work medicine for many purposes such as for treating non-commercially, as long as appropriate credit is given and the new bronchitis, spleen enlargement, asthma, heart and creations are licensed under the identical terms. © 2020 Egyptian Pharmaceutical Journal | Published by Wolters Kluwer - Medknow DOI: 10.4103/epj.epj_17_20 [Downloaded free from http://www.epj.eg.net on Tuesday, January 26, 2021, IP: 158.232.3.16] Japanese lichens and green mosses Elkhateeb and Daba 217 Figure 1 Candelariella vitellina (Photographs taken by Waill A. Elkhateeb, Locality: Hakozaki Higashi-ku Fukuoka-shi Japan). Figure 2 lichen) is a common and widespread crustose lichen. It is characterized by its green-yellow to orange-yellow colors, and it grows on the bark, rock, and wood all over the world (Fig. 2). C. vitellina belongs to the kingdom Fungi, class lecanoromycetes, order Candelariales, and family Candelariaceae. This promising lichen is a rich source of antioxidants and anticancer compounds. C. vitellina is a common green-yellow lichen found on the barks, woods, and rocks in Japanese forests. High- performance liquid chromatography and −high- resolution electrospray ionization mass spectrometry analyses revealed seven new compounds and 11 natural compounds of terpenes and polyketides [11,12]. Lepraria The genus Lepraria Ach., with a worldwide distribution, comprises morphologically simple lichen-forming fungi that never develop fruiting bodies. Thallus crustose to sub-foliose or squamulose, with a powdery, granular, cottony, membranous or sub-squamulose to sub-foliose appearance; variously colored, but not very bright, grayish, greenish and creamy hues prevalent; thin to thick, soft or hard [13]. The lichen Lepraria incana Lepraria incana (Photographs taken by Waill A. Elkhateeb, Locality: (also known as dust lichen) belongs to the kingdom Hakozaki Higashi-ku Fukuoka-shi Japan). Fungi, class lecanoromycetes, order: Lecanorales, Family: Stereocaulaceae (Fig. 3). It is a common lichen that grows on many substrates in the pattern of species. Few lichenologists collect and study granulated patches or dust-like form. Rare studies have Candelariella, possibly because of the presumed been conducted describing the chemical analysis and difficulties in correctly identifying the species [10]. biological activities of this lichen. Previous chemical Candelariella vitellina (also known as egg yolk investigation showed that L. incana contained [Downloaded free from http://www.epj.eg.net on Tuesday, January 26, 2021, IP: 158.232.3.16] 218 Egyptian Pharmaceutical Journal, Vol. 19 No. 3, July-September 2020 Figure 3 Divaricatic acid, nordivaricatic acid, zeorin [13], and atranorin; anthraquinones in addition to parietin, fallacinal, parietinic acid and citreorosein [14], gyrophoric acid, lecanoric acid, thamnolic acid, and an unknown terpenoid [15]. Dirinaria Dirinaria genus is widely distributed in the tropical and subtropical areas that comprised approximately 36 species worldwide [16]. Dirinaria applanata is a worldwide spreading lichen that belongs to the kingdom Fungi, class lecanoromycetes, order: Teloschistales, Family: Caliciaceae. Chemical analyses conducted on this lichen are described in few studies [17,18]. D. applanata is a foliose lichen, which is widely distributed in tropical areas (Fig. 4). Previous chemical investigations showed that D. applanata contained atranorin, carotenoids divaricatinic acid and its ester derivatives, methyl hematommate, methyl β- orcinolcarboxylate, ramalinic acid, lichenxanthones, tannins, and Dirinaria applanata (Photographs taken by Waill A. Elkhateeb, Lo- terpenes such as the novel hopane 1β-acetoxy-21α- cality: Hakozaki Higashi-ku Fukuoka-shi Japan). hopane-3β,22-diol [17–21]. Figure 4 Green moss: (a) Brachythecium velutinum (green), (b) Brachythecium velutinum (brown), and (c) Brachythecium rutabulum (photographs taken by Waill A. Elkhateeb, locality: Hakozaki Higashi-ku Fukuoka-shi, Japan). [Downloaded free from http://www.epj.eg.net on Tuesday, January 26, 2021, IP: 158.232.3.16] Japanese lichens and green mosses Elkhateeb and Daba 219 Green moss As shown in Table 1, C. vitellina is rich in various Brachytheciaceae is a family of mosses, class Hypnales bioactive organic compounds belonging to terpenes from the order Hypnales. The family includes more such as dechloromycorrhizin A, hericenone A, than 40 genera and 250 species. The most common demethoxyviridin, scytalidic acid, ovellin B, ceriporic genus is Brachythecium and the most common species acid B, ganodermatriol, fomefficinic acid A, ganoderol are Brachythecium rutabulum and Brachythecium A, and ganoderol F. Majority of these compounds velutinum. B. rutabulum and B. velutinum (also exhibit well-known biological