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      Chemical and Biological Research on Herbal Medicines Rich in Xanthones

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          Abstract

          Xanthones, as some of the most active components and widely distributed in various herb medicines, have drawn more and more attention in recent years. So far, 168 species of herbal plants belong to 58 genera, 24 families have been reported to contain xanthones. Among them, Calophyllum, Cratoxylum, Cudrania, Garcinia, Gentiana, Hypericum and Swertia genera are plant resources with great development prospect. This paper summarizes the plant resources, bioactivity and the structure-activity relationships (SARs) of xanthones from references published over the last few decades, which may be useful for new drug research and development on xanthones.

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          Most cited references182

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          Biological Activities and Bioavailability of Mangosteen Xanthones: A Critical Review of the Current Evidence

          Mangosteen (Garcinia mangostana L.) is a tropical tree native to Southeast Asia that produces a fruit whose pericarp contains a family of tricyclic isoprenylated polyphenols referred to as xanthones. Numerous in vitro studies have shown that these xanthones possess anti-oxidant, anti-proliferative, pro-apoptotic, anti-inflammatory and anti-carcinogenic activities. Aggressive marketing of such health promoting benefits has resulted in mangosteen’s classification as a “superfruit”. This has led to sales of mangosteen containing beverages in USA alone exceeding $200 million in 2008 despite very limited animal and human studies. This review will (a) critically address recent reports of in vivo studies on the bioavailability and metabolism of mangosteen xanthones, (b) update the in vitro and in vivo data on anti-cancer and anti-inflammatory activities of mangosteen xanthones, and (c) suggest needed areas of inquiry regarding the absorption, metabolism and efficacy of mangosteen xanthones.
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            Tetraoxygenated naturally occurring xanthones.

            This review, with 350 references, gives information on the chemical study of 234 naturally occurring tetraoxygenated xanthones in 12 families, 53 genus and 182 species of higher plants, and two which are described as fungal and lichen metabolites. The value of these groups of substances in connection with pharmacological activity and therapeutic use of some species is described. The structural formulas of 135 isolated compounds, and their distribution, are also given.
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              Caged Garcinia xanthones: development since 1937.

              Caged xanthones, characterized by a unique 4-oxa-tricyclo[4.3.1.0(3,7)]dec-2-one scaffold, are a special class of bioactive components mainly derived from the Garcinia genus (Guttiferae family). Around 100 compounds from this family have been reported to date and most of them have potent antitumor activity, with gambogic acid being the best representative. During the past decades, inspired by the unusual caged skeleton and remarkable bioactivity, scientists from various fields have shown increasing interest on these promising natural products. In this review, the plant resources, structural characteristics, total synthesis, biological activity and mechanisms of action, structure activity relationship, and anticancer drug development of these caged xanthones are described.
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                Author and article information

                Journal
                Molecules
                Molecules
                molecules
                Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry
                MDPI
                1420-3049
                11 October 2017
                October 2017
                : 22
                : 10
                : 1698
                Affiliations
                [1 ]Tianjin State Key Laboratory of Modern Chinese Medicine, 312 Anshanxi Road, Nankai District, Tianjin 300193, China; Ruanjy19930919@ 123456163.com (J.R.); 18702270347@ 123456163.com (C.Z.); liuyanxia210@ 123456163.com (Y.L.)
                [2 ]Tianjin Key Laboratory of TCM Chemistry and Analysis, Institute of Traditional Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 312 Anshan Road, Nankai District, Tianjin 300193, China; qululuhan88@ 123456163.com (L.Q.); yuhaiyang19830116@ 123456hotmail.com (H.Y.); hanlifeng_1@ 123456163.com (L.H.)
                Author notes
                [* ]Correspondence: zhwwxzh@ 123456263.net (Y.Z.); wangtao@ 123456tjutcm.edu.cn (T.W.); Tel./Fax: +86-22-5959-6163 (Y.Z. & T.W.)
                Article
                molecules-22-01698
                10.3390/molecules22101698
                6151445
                29019929
                851161c9-2312-4294-bc72-79bc6b127ce8
                © 2017 by the authors.

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                : 11 September 2017
                : 09 October 2017
                Categories
                Review

                herbal medicines,xanthones,plant sources,pharmacology,gambogic acid,structure-activity relationships

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