1
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Hu Z, Liu YN, Yu MH, Hou AJ, Li JY, Li YX, Lei C. Formyl phloroglucinol meroterpenoids from the leaves of Eucalyptus globulus subsp. maidenii and their ATP-citrate lyase inhibitory activities. Fitoterapia 2024; 173:105813. [PMID: 38184174 DOI: 10.1016/j.fitote.2023.105813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 12/29/2023] [Accepted: 12/29/2023] [Indexed: 01/08/2024]
Abstract
Three new formyl phloroglucinol meroterpenoids, eumaidials A-C (1-3), were isolated from the leaves of Eucalyptus globulus subsp. maidenii, along with ten known analogues (4-13). Their chemical structures were determined by various spectral data and electronic circular dichroism calculations. Eumaidial A (1) is the first β-caryophyllene-based formyl phloroglucinol meroterpenoids from the genus Eucalyptus. Compounds 1-4 and 10 exhibited ATP-citrate lyase inhibitory activities, and compounds 2 and 3 suppressed the hepatocyte lipogenesis.
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Affiliation(s)
- Zhu Hu
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Yi-Nan Liu
- School of Pharmacy, Fudan University, Shanghai 201203, China; Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Mei-Hua Yu
- School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Ai-Jun Hou
- School of Pharmacy, Fudan University, Shanghai 201203, China; School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jing-Ya Li
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
| | - Ying-Xia Li
- School of Pharmacy, Fudan University, Shanghai 201203, China.
| | - Chun Lei
- School of Pharmacy, Fudan University, Shanghai 201203, China.
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2
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Song JG, Liu JX, Huang RL, Tang W, Huang XJ, Wang Y, Ye WC. Tautomeric cinnamoylphloroglucinol-monoterpene adducts from Cleistocalyx operculatus and their antiviral activities. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2024; 26:38-51. [PMID: 38190257 DOI: 10.1080/10286020.2023.2288290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Accepted: 11/22/2023] [Indexed: 01/10/2024]
Abstract
Guided by 1H NMR spectroscopic experiments using the characteristic enol proton signals as probes, three pairs of new tautomeric cinnamoylphloroglucinol-monoterpene adducts (1-3) were isolated from the buds of Cleistocalyx operculatus. Their structures with absolute configurations were established by spectroscopic analysis, modified Mosher's method, and quantum chemical electronic circular dichroism calculation. Compounds 1-3 represent a novel class of cinnamoylphloroglucinol-monoterpene adducts featuring an unusual C-4-C-1' linkage between 2,2,4-trimethyl-cinnamyl-β-triketone and modified linear monoterpenoid motifs. Notably, compounds 1-3 exhibited significant in vitro antiviral activity against respiratory syncytial virus (RSV).
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Affiliation(s)
- Jian-Guo Song
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Jia-Xin Liu
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Rui-Li Huang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Wei Tang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Xiao-Jun Huang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Ying Wang
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Wen-Cai Ye
- State Key Laboratory of Bioactive Molecules and Druggability Assessment, Jinan University, Guangzhou 510632, China
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research, Jinan University, Guangzhou 510632, China
- Center for Bioactive Natural Molecules and Innovative Drugs Research, College of Pharmacy, Jinan University, Guangzhou 510632, China
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3
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Baxter JR, Holland DC, Gavranich B, Nicolle D, Hayton JB, Avery VM, Carroll AR. NMR Fingerprints of Formyl Phloroglucinol Meroterpenoids and Their Application to the Investigation of Eucalyptus gittinsii subsp. gittinsii. JOURNAL OF NATURAL PRODUCTS 2023; 86:1317-1334. [PMID: 37171174 DOI: 10.1021/acs.jnatprod.3c00139] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
NMR fingerprints provide powerful tools to identify natural products in complex mixtures. Principal component analysis and machine learning using 1H and 13C NMR data, alongside structural information from 180 published formyl phloroglucinols, have generated diagnostic NMR fingerprints to categorize subclasses within this group. This resulted in the reassignment of 167 NMR chemical shifts ascribed to 44 compounds. Three pyrano-diformyl phloroglucinols, euglobal In-1 and psiguadiols E and G, contained 1H and 13C NMR data inconsistent with their predicted phloroglucinol subclass. Subsequent reinterpretation of their 2D NMR data combined with DFT 13C NMR chemical shift and ECD calculations led to their structure revisions. Direct covariance processing of HMBC data permitted 1H resonances for individual compounds in mixtures to be associated, and analysis of their 1H/13C HMBC correlations using the fingerprint tool further classified components into phloroglucinol subclasses. NMR fingerprinting HMBC data obtained for six eucalypt flower extracts identified three subclasses of pyrano-acyl-formyl phloroglucinols from Eucalyptus gittinsii subsp. gittinsii. New, eucalteretial F and (+)-eucalteretial B, and known, (-)-euglobal VII and eucalrobusone C, compounds, each belonging to predicted subclasses, were isolated and characterized. Staphylococcus aureus and Plasmodium falciparum screening revealed eucalrobusone C as the most potent antiplasmodial formyl phloroglucinol to date.
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Affiliation(s)
- James R Baxter
- School of Environment and Science, Griffith University, Gold Coast, Qld 4222, Australia
| | - Darren C Holland
- School of Environment and Science, Griffith University, Gold Coast, Qld 4222, Australia
| | - Brody Gavranich
- School of Environment and Science, Griffith University, Gold Coast, Qld 4222, Australia
| | - Dean Nicolle
- Currency Creek Arboretum, PO Box 808, Melrose Park, SA 5039, Australia
| | - Joshua B Hayton
- School of Environment and Science, Griffith University, Gold Coast, Qld 4222, Australia
| | - Vicky M Avery
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Qld 4111, Australia
- Discovery Biology, Griffith University, Brisbane, QLD 4111, Australia
| | - Anthony R Carroll
- School of Environment and Science, Griffith University, Gold Coast, Qld 4222, Australia
- Griffith Institute for Drug Discovery, Griffith University, Brisbane, Qld 4111, Australia
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4
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Li JS, Liu YN, Li JY, Lei C, Hou AJ. Acylphloroglucinol-monoterpene meroterpenoids from Eucalyptus tereticornis and their inhibitory activity against ATP citrate lyase. PHYTOCHEMISTRY 2023; 207:113565. [PMID: 36549384 DOI: 10.1016/j.phytochem.2022.113565] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 12/16/2022] [Accepted: 12/17/2022] [Indexed: 06/17/2023]
Abstract
Five undescribed enantiomeric pairs of acylphloroglucinol-monoterpene meroterpenoids ((+)-/(-)-eucateretins A-E) resolved by chiral-phase HPLC were obtained from the leaves of Eucalyptus tereticornis Smith, along with nine known analogues. Their structures were elucidated by spectroscopic methods and ECD calculations. This is the first report of meroterpenoid enantiomers from this plant. Some of the isolates, (-)-eucateretin A, (+)-/(-)-eucateretins E, 7'α-eucalrobusone X, eucalrobusone X, and robustadial B, exhibited inhibitory effects on ATP citrate lyase, and 7'α-eucalrobusone X significantly suppressed the hepatocyte lipogenesis.
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Affiliation(s)
- Jin-Sheng Li
- School of Pharmacy, Fudan University, Shanghai, 201203, China
| | - Yi-Nan Liu
- School of Pharmacy, Fudan University, Shanghai, 201203, China; Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Jing-Ya Li
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chun Lei
- School of Pharmacy, Fudan University, Shanghai, 201203, China.
| | - Ai-Jun Hou
- School of Pharmacy, Fudan University, Shanghai, 201203, China; School of Pharmacy, Shanghai Jiao Tong University, Shanghai, 200240, China.
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5
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Saber FR, Munekata PES, Rizwan K, El-Nashar HAS, Fahmy NM, Aly SH, El-Shazly M, Bouyahya A, Lorenzo JM. Family Myrtaceae: The treasure hidden in the complex/diverse composition. Crit Rev Food Sci Nutr 2023; 64:6737-6755. [PMID: 36748791 DOI: 10.1080/10408398.2023.2173720] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Myrtaceae is one of the most important plants families, being regarded as the eighth largest flowering plant family. It includes many genera of utmost ecological and economical importance distributed all over the world. This review aimed to report the latest studies on this family focusing on certain widely used plants including Eucalyptus sp., Eugenia sp. (Eugenia uniflora, Eugenia sulcata), Syzygium sp. (Syzygium aromaticum and Syzygium cumini), Psidium sp., Pimenta dioica, Myrtus sp. (Myrtus communis), Myrciaria sp. and Melaleuca alternifolia. The extraction of bioactive compounds has been evolving through the optimization of conventional methods and the use of emerging technologies. Supercritical CO2 was applied for essential oils and ultrasound for polyphenols leading to extracts and essential oils rich in bioactive compounds. Advances in the field of encapsulation and delivery systems showed promising results in the production of stable essential oils nanoemulsions and liposomes and the production of plant extracts in the form of nanoparticles. Moreover, a significant increase in the number of patents was noticed especially the application of Myrtaceae extracts in the pharrmacuetucal field. The applications of ceratin plants (Pimenta dioica, Melaleuca alternifolia, Syzygium aromaticum essential oils or Myrciaria cauliflora peel extract) in food area (either as a free or encapsulated form) also showed interesting results in limiting microbial spoilage of fresh meat and fish, slowing oxidative degradation in meat products, and inhibiting aflatoxin production in maize. Despite the massive literature on Myrtaceae plants, advances are still necessary to optimize the extraction with environmentally friendly technologies and carry out risk assessment studies should be accomplished to harness the full potential in food, industrial and pharmaceutical applications.
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Affiliation(s)
- Fatema R Saber
- Pharmacognosy Department, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Paulo E S Munekata
- Centro Tecnológico de la Carne de Galicia, Avd. Galicia No. 4, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain
| | - Komal Rizwan
- Department of Chemistry, University of Sahiwal, Sahiwal, Pakistan
| | - Heba A S El-Nashar
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Nouran M Fahmy
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Shaza H Aly
- Department of Pharmacognosy, Faculty of Pharmacy, Badr University in Cairo, Cairo, Egypt
| | - Mohamed El-Shazly
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Abdelhakim Bouyahya
- Laboratory of Human Pathologies Biology, Department of Biology, Faculty of Sciences, Mohammed V University in Rabat, Rabat, Morocco
| | - Jose M Lorenzo
- Centro Tecnológico de la Carne de Galicia, Avd. Galicia No. 4, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain
- Área de Tecnología de los Alimentos, Facultad de Ciencias de Ourense, Universidade de Vigo, Ourense, Spain
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6
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Garrido-Zoido JM, Cajina F, Matamoros E, Gil MV, Cintas P, Palacios JC. A synthetically benign one-pot construction of enamino-xanthene dyes. Org Biomol Chem 2022; 20:8108-8119. [PMID: 36214790 DOI: 10.1039/d2ob01358d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Polyhydroxylated phenols are components of biomass and precursors of pigments in plants. This paper reports a novel entry to xanthene dyes, involving the reaction of 2,4,6-trihydroxybenzaldehyde with primary aliphatic amines. This catalyst-free synthesis exhibits a high atom economy and can be conducted under eco-friendly conditions and operational simplicity.
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Affiliation(s)
- Juan Manuel Garrido-Zoido
- Departamento de Química Orgánica e Inorgánica, Facultad de Ciencias and IACYS-Unidad de Química Verde y Desarrollo Sostenible, Universidad de Extremadura, E-06006 Badajoz, Spain.
| | - Franklin Cajina
- Departamento de Química Orgánica e Inorgánica, Facultad de Ciencias and IACYS-Unidad de Química Verde y Desarrollo Sostenible, Universidad de Extremadura, E-06006 Badajoz, Spain.
| | - Esther Matamoros
- Departamento de Química Orgánica e Inorgánica, Facultad de Ciencias and IACYS-Unidad de Química Verde y Desarrollo Sostenible, Universidad de Extremadura, E-06006 Badajoz, Spain.
| | - M Victoria Gil
- Departamento de Química Orgánica e Inorgánica, Facultad de Ciencias and IACYS-Unidad de Química Verde y Desarrollo Sostenible, Universidad de Extremadura, E-06006 Badajoz, Spain.
| | - Pedro Cintas
- Departamento de Química Orgánica e Inorgánica, Facultad de Ciencias and IACYS-Unidad de Química Verde y Desarrollo Sostenible, Universidad de Extremadura, E-06006 Badajoz, Spain.
| | - Juan C Palacios
- Departamento de Química Orgánica e Inorgánica, Facultad de Ciencias and IACYS-Unidad de Química Verde y Desarrollo Sostenible, Universidad de Extremadura, E-06006 Badajoz, Spain.
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7
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Deng X, Xia J, Hu B, Hou XC, Pu XD, Wu L. Hyjapones A-D, trimethylated acyphloroglucinol meroterpenoids from Hypericum japonicum thunb. With anti-inflammatory activity. PHYTOCHEMISTRY 2022; 202:113308. [PMID: 35817204 DOI: 10.1016/j.phytochem.2022.113308] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2022] [Revised: 06/29/2022] [Accepted: 06/30/2022] [Indexed: 06/15/2023]
Abstract
Four undescribed trimethylated acylphloroglucinol meroterpenoids, hyjapones A-D, along with seven known analogues, were isolated from Hypericum japonicum Thunb. Hyjapone A represents the first example of a double norflavesones-caryophyllene hybrid featuring a rare 6/6/9/4/6/6 hexacyclic frame. Hyjapone D was isolated as a natural product for the first time. Their structures and absolute configurations were established by comprehensive spectroscopic data analyses and electronic circular dichroism (ECD) calculations. The anti-inflammatory activities of all compounds were evaluated using lipopolysaccharide-induced RAW264.7 cells. Hyperjapone A showed more pronounced anti-inflammatory effect through reducing the production of nitric oxide (IC50 value of 11.32 ± 2.10 μM) and proinflammatory cytokines. In addition, the mechanistic studies revealed hyperjapone A inhibited LPS-induced activation of nuclear factor-κB.
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Affiliation(s)
- Xin Deng
- School of Pharmacy, Anhui Medical University, Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Medical University, Hefei, 230032, People's Republic of China
| | - Jing Xia
- School of Pharmacy, Anhui Medical University, Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Medical University, Hefei, 230032, People's Republic of China
| | - Bo Hu
- School of Pharmacy, Anhui Medical University, Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Medical University, Hefei, 230032, People's Republic of China
| | - Xing-Cun Hou
- School of Pharmacy, Anhui Medical University, Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Medical University, Hefei, 230032, People's Republic of China
| | - Xiang-Dong Pu
- School of Pharmacy, Anhui Medical University, Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Medical University, Hefei, 230032, People's Republic of China.
| | - Lin Wu
- School of Pharmacy, Anhui Medical University, Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Medical University, Hefei, 230032, People's Republic of China.
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8
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Eucarbwenstols A-H, eight novel compounds from Eucalyptus robusta prevents MPC-5 injury via ROS modulation and regulation of mitochondrial membrane potential. Bioorg Chem 2022; 129:106159. [PMID: 36155091 DOI: 10.1016/j.bioorg.2022.106159] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 09/01/2022] [Accepted: 09/12/2022] [Indexed: 11/21/2022]
Abstract
BACKGROUND The damage of podocytes is a primary hallmark of lupus nephritis (LN). Therefore, finding an effective way to inhibit the podocyte injury is important for improving the survival and development of patients with LN. Eucalyptus robusta exhibits anti-inflammatory properties. However, whether Formyl phloroglucinol meroterpenoids (FPMs), which are specialized metabolites of the genus Eucalyptus, is an anti-inflammatory active ingredient of E. robusta remains to be determined. PURPOSE This study asimed to identify novel FPMs from E. robusta and investigated their anti-inflammatory effects. METHODS Various separation methods were used to isolate and identify the compounds in the PE extract of E. robusta. The structures of the isolates were determined using 1D/2D NMR data and electron circular dichroism (ECD) calculations. The level of mitochondrial reactive oxygen species (ROS) level and mitochondrial membrane potential (MMP) of the podocyte cell line, MPC-5, were assessed using a multifunctional microplate reader combined with flow cytometry and fluorescence microscopy. RESULTS Eight novel FPMs (1-8, Eucarbwenstols A-H, Fig. 1) and 15 known FPMs (9-23) were purified from the PE extract of E. robusta. It is noteworthy that compound 1 possesses an unprecedented FPM carbon skeleton. Among these compounds, compounds 1, 2, 4 and 5 showed the most promising potential for protecting MPC-5 cells because pretreatment with pro-inflammatory cytokines TGF-β, IFN-α and IL-6 decreased ROS production and ameliorated the mitochondrial state. CONCLUSIONS Our research contributes to the characterization of E. robusta constituents and highlights the anti-inflammatory effects of FPMs.
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9
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Fuloria NK, Raheja RK, Shah KH, Oza MJ, Kulkarni YA, Subramaniyan V, Sekar M, Fuloria S. Biological activities of meroterpenoids isolated from different sources. Front Pharmacol 2022; 13:830103. [PMID: 36199687 PMCID: PMC9527340 DOI: 10.3389/fphar.2022.830103] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 08/04/2022] [Indexed: 11/13/2022] Open
Abstract
Meroterpenoids are natural products synthesized by unicellular organisms such as bacteria and multicellular organisms such as fungi, plants, and animals, including those of marine origin. Structurally, these compounds exhibit a wide diversity depending upon the origin and the biosynthetic pathway they emerge from. This diversity in structural features imparts a wide spectrum of biological activity to meroterpenoids. Based on the biosynthetic pathway of origin, these compounds are either polyketide-terpenoids or non-polyketide terpenoids. The recent surge of interest in meroterpenoids has led to a systematic screening of these compounds for many biological actions. Different meroterpenoids have been recorded for a broad range of operations, such as anti-cholinesterase, COX-2 inhibitory, anti-leishmanial, anti-diabetic, anti-oxidative, anti-inflammatory, anti-neoplastic, anti-bacterial, antimalarial, anti-viral, anti-obesity, and insecticidal activity. Meroterpenoids also possess inhibitory activity against the expression of nitric oxide, TNF- α, and other inflammatory mediators. These compounds also show renal protective, cardioprotective, and neuroprotective activities. The present review includes literature from 1999 to date and discusses 590 biologically active meroterpenoids, of which 231 are from fungal sources, 212 are from various species of plants, and 147 are from marine sources such as algae and sponges.
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Affiliation(s)
| | | | - Kaushal H. Shah
- SVKM’s Dr. Bhanuben Nanavati College of Pharmacy, Mumbai, India
| | - Manisha J. Oza
- SVKM’s Dr. Bhanuben Nanavati College of Pharmacy, Mumbai, India
| | - Yogesh A. Kulkarni
- Shobhaben Pratapbhai Patel School of Pharmacy & Technology Management, SVKM’s NMIMS, Mumbai, India
| | | | - Mahendran Sekar
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy and Health Sciences, Royal College of Medicine Perak, Universiti Kuala Lumpur, Ipoh, Malaysia
| | - Shivkanya Fuloria
- Faculty of Pharmacy, AIMST University, Bedong, Malaysia
- *Correspondence: Shivkanya Fuloria,
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10
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Daus M, Wunnoo S, Voravuthikunchai SP, Saithong S, Poldorn P, Jungsuttiwong S, Chomlamay N, Yangok K, Watanapokasin R, Chakthong S. Phloroglucinol-meroterpenoids from the leaves of Eucalyptus camaldulensis Dehnh. PHYTOCHEMISTRY 2022; 200:113179. [PMID: 35398088 DOI: 10.1016/j.phytochem.2022.113179] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Revised: 03/26/2022] [Accepted: 03/27/2022] [Indexed: 06/14/2023]
Abstract
Fourteen undescribed phloroglucinol-meroterpenoids, namely eucalypcamals A-N, were isolated from a CH2Cl2 extract of the leaves of Eucalyptus camaldulensis Dehnh. In addition, from the same extract, twelve known phloroglucinols, three known flavonoids, and four known phenolic compounds were also isolated. The structures of the undescribed compounds were analyzed by 1D and 2D nuclear magnetic resonance (NMR) spectroscopy, and high resolution electrospray ionization mass spectrometry (HRESIMS). The assignments of the absolute configurations were performed by comparing the experimental electronic circular dichroism (ECD) data with the calculated values. Eucalyprobusal E was found to be cytotoxic against HCT116, Jurkat, and MDA-MB-231 cell lines with IC50 values of 17.6, 9.44, and 17.9 μM, respectively. Eucalrobusone F exhibited antibacterial activity against methicillin-resistant S. aureus (MRSA) and S. aureus with minimum inhibitory concentration/minimum bactericidal concentration (MIC/MBC) values of 4/4 μg/mL while euglobal Ia1 showed antifungal activity with MIC/MFC values of 16/16 μg/mL.
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Affiliation(s)
- Mareena Daus
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Natural Product Research Center of Excellence, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
| | - Suttiwan Wunnoo
- Natural Product Research Center of Excellence, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Division of Biological Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
| | - Supayang P Voravuthikunchai
- Natural Product Research Center of Excellence, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Center of Antimicrobial Biomaterial Innovation-Southeast Asia, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
| | - Saowanit Saithong
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand
| | - Preeyaporn Poldorn
- Department of Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani, 34190, Thailand
| | - Siriporn Jungsuttiwong
- Department of Chemistry, Faculty of Science, Ubon Ratchathani University, Ubon Ratchathani, 34190, Thailand
| | - Natharika Chomlamay
- Department of Biochemistry, Faculty of Medicine, Srinakharinwirot University, Sukumvit 23, Bangkok, 10110, Thailand
| | - Kanyaluck Yangok
- Department of Biochemistry, Faculty of Medicine, Srinakharinwirot University, Sukumvit 23, Bangkok, 10110, Thailand
| | - Ramida Watanapokasin
- Department of Biochemistry, Faculty of Medicine, Srinakharinwirot University, Sukumvit 23, Bangkok, 10110, Thailand
| | - Suda Chakthong
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Natural Product Research Center of Excellence, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110, Thailand.
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11
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Faezeh Taghizadeh S, Panahi A, Esmaeilzadeh Kashi M, Kretschmer N, Asili J, Ahmad Emami S, Azizi M, Shakeri A. Structural Diversity of Complex Phloroglucinol Derivatives from Eucalyptus Species. Chem Biodivers 2022; 19:e202200025. [PMID: 35621714 DOI: 10.1002/cbdv.202200025] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 05/16/2022] [Indexed: 12/17/2022]
Abstract
Several species of the genus Eucalyptus are used in many traditional medicine systems for the treatment of respiratory tract infections, colds, flu, sore throats, and bronchitis. The genus Eucalyptus (Myrtaceae) is a well-known natural source of bioactive phloroglucinols. These polyphenolic compounds bear an aromatic phenyl ring with three hydroxy groups (1,3,5-trihydroxybenzene) which have been exhibiting a variety of biological activities such as antimicrobial, anticancer, anti-allergic, anti-inflammatory, and antioxidant activities. This review summarizes the literature published from 1997 until the end of 2021 and addresses the structure diversity of phloroglucinols isolated from Eucalyptus species and their biological activities. Phloroglucinol-terpene adducts are the main class of compounds that have been reported in this genus.
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Affiliation(s)
- Seyedeh Faezeh Taghizadeh
- Department of Horticultural Sciences, Faculty of Agriculture, Ferdowsi University of Mashhad, 9177948978, Mashhad, Iran.,Pharmaceutical Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, 9177897165, Mashhad, Iran
| | - Ali Panahi
- Department of Pharmacognosy, School of Pharmacy, Mashhad University of Medical Sciences, 9177897165, Mashhad, Iran
| | - Marziyeh Esmaeilzadeh Kashi
- Department of Pharmacognosy, School of Pharmacy, Mashhad University of Medical Sciences, 9177897165, Mashhad, Iran
| | - Nadine Kretschmer
- Department of Pharmacognosy, Institute of Pharmaceutical Sciences, University of Graz, A-8010, Graz, Austria
| | - Javad Asili
- Department of Pharmacognosy, School of Pharmacy, Mashhad University of Medical Sciences, 9177897165, Mashhad, Iran
| | - Seyed Ahmad Emami
- Department of Traditional Pharmacy, School of Pharmacy, Mashhad University of Medical Sciences, 9177897165, Mashhad, Iran
| | - Majid Azizi
- Department of Horticultural Sciences, Faculty of Agriculture, Ferdowsi University of Mashhad, 9177948978, Mashhad, Iran
| | - Abolfazl Shakeri
- Department of Pharmacognosy, School of Pharmacy, Mashhad University of Medical Sciences, 9177897165, Mashhad, Iran
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12
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Purdy TN, Moore BS, Lukowski AL. Harnessing ortho-Quinone Methides in Natural Product Biosynthesis and Biocatalysis. JOURNAL OF NATURAL PRODUCTS 2022; 85:688-701. [PMID: 35108487 PMCID: PMC9006567 DOI: 10.1021/acs.jnatprod.1c01026] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The implementation of ortho-quinone methide (o-QM) intermediates in complex molecule assembly represents a remarkably efficient strategy designed by Nature and utilized by synthetic chemists. o-QMs have been taken advantage of in biomimetic syntheses for decades, yet relatively few examples of o-QM-generating enzymes in natural product biosynthetic pathways have been reported. The biosynthetic enzymes that have been discovered thus far exhibit tremendous potential for biocatalytic applications, enabling the selective production of desirable compounds that are otherwise intractable or inherently difficult to achieve by traditional synthetic methods. Characterization of this biosynthetic machinery has the potential to shine a light on new enzymes capable of similar chemistry on diverse substrates, thus expanding our knowledge of Nature's catalytic repertoire. The presently known o-QM-generating enzymes include flavin-dependent oxidases, hetero-Diels-Alderases, S-adenosyl-l-methionine-dependent pericyclases, and α-ketoglutarate-dependent nonheme iron enzymes. In this review, we discuss their diverse enzymatic mechanisms and potential as biocatalysts in constructing natural product molecules such as cannabinoids.
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Affiliation(s)
- Trevor N Purdy
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, La Jolla, California 92093, United States
| | - Bradley S Moore
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, La Jolla, California 92093, United States
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California at San Diego, La Jolla, California 92093, United States
| | - April L Lukowski
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, La Jolla, California 92093, United States
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13
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Liu R, Liu XY, Li M, Liu J, Yang MH, Kong LY. Eurobusones A-D, four antibacterial formyl phloroglucinol meoterpenoids from Eucalyptus robusta. Fitoterapia 2022; 157:105131. [PMID: 35093480 DOI: 10.1016/j.fitote.2022.105131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/13/2022] [Accepted: 01/13/2022] [Indexed: 11/04/2022]
Abstract
Four antibacterial formyl phloroglucinol meroterpenoids (FPMs), eurobusones A-D (1-4), as well as six known analogues (5-10), were isolated from the leaves of Eucalyptus robusta. Their structures were determined by the analysis of spectroscopic data and electron circular dichroism (ECD) calculation, along with the application of Snatzke helicity rules. Among them, compounds 2 and 8-10 showed good activity against Staphylococcus aureus, Pseudomonas aeruginosa and Bacillus subtilis with MIC50 values less than 1.00 μg/mL.
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Affiliation(s)
- Rui Liu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Xiang-Yue Liu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Min Li
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Juan Liu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Ming-Hua Yang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China..
| | - Ling-Yi Kong
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China..
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14
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Nazir M, Saleem M, Tousif MI, Anwar MA, Surup F, Ali I, Wang D, Mamadalieva NZ, Alshammari E, Ashour ML, Ashour AM, Ahmed I, Elizbit, Green IR, Hussain H. Meroterpenoids: A Comprehensive Update Insight on Structural Diversity and Biology. Biomolecules 2021; 11:957. [PMID: 34209734 PMCID: PMC8301922 DOI: 10.3390/biom11070957] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 06/23/2021] [Accepted: 06/24/2021] [Indexed: 11/17/2022] Open
Abstract
Meroterpenoids are secondary metabolites formed due to mixed biosynthetic pathways which are produced in part from a terpenoid co-substrate. These mixed biosynthetically hybrid compounds are widely produced by bacteria, algae, plants, and animals. Notably amazing chemical diversity is generated among meroterpenoids via a combination of terpenoid scaffolds with polyketides, alkaloids, phenols, and amino acids. This review deals with the isolation, chemical diversity, and biological effects of 452 new meroterpenoids reported from natural sources from January 2016 to December 2020. Most of the meroterpenoids possess antimicrobial, cytotoxic, antioxidant, anti-inflammatory, antiviral, enzyme inhibitory, and immunosupressive effects.
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Affiliation(s)
- Mamona Nazir
- Department of Chemistry, Government Sadiq College Women University Bahawalpur, Bahawalpur 63100, Pakistan
| | - Muhammad Saleem
- Institute of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan
| | - Muhammad Imran Tousif
- Department of Chemistry, DG Khan Campus, University of Education Lahore, Dera Ghazi Khan 32200, Pakistan
| | - Muhammad Aijaz Anwar
- Pharmaceutical Research Division, PCSIR Laboratories Complex Karachi, Karachi 75280, Pakistan
| | - Frank Surup
- Microbial Drugs, Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany
| | - Iftikhar Ali
- School of Pharmaceutical Sciences and Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province, Shandong Analysis and Test Center, School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
- Department of Chemistry, Karakoram International University, Gilgit 15100, Pakistan
| | - Daijie Wang
- School of Pharmaceutical Sciences and Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province, Shandong Analysis and Test Center, School of Pharmaceutical Sciences, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China
| | - Nilufar Z Mamadalieva
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle, Germany
- Institute of the Chemistry of Plant Substances, Uzbekistan Academy of Sciences, Mirzo Ulugbek Str 77, Tashkent 100170, Uzbekistan
| | - Elham Alshammari
- Department of Pharmacy Practice, College of Pharmacy, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi Arabia
| | - Mohamed L Ashour
- Department of Pharmaceutical Sciences, Pharmacy Program, Batterjee Medical College, Jeddah 21442, Saudi Arabia
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo 11566, Egypt
| | - Ahmed M Ashour
- Department of Pharmacology and Toxicology, College of Pharmacy, Umm Al-Qura University, P.O. Box 13578, Makkah 21955, Saudi Arabia
| | - Ishtiaq Ahmed
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB2 1TN, UK
| | - Elizbit
- Department of Materials Engineering, National University of Sciences and Technology (NUST) H12, Islamabad 44000, Pakistan
| | - Ivan R Green
- Department of Chemistry and Polymer Science, University of Stellenbosch, Private Bag X1, Matieland, Stellenbosch 7600, South Africa
| | - Hidayat Hussain
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle, Germany
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15
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Zhang J, Nguyen DT, Pierens GK, Cock I, Feng Y. Austrobuxusin N, a new picrotoxane terpenoid glycoside, from the Australian endemic plant Austrobuxus swainii (Beuzev. & C.T. White) Airy Shaw. Nat Prod Res 2021; 36:5199-5205. [PMID: 34000925 DOI: 10.1080/14786419.2021.1923710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
A new picrotoxane terpenoid glycoside, austrobuxusin N (1), together with four known compounds, austrobuxusin A-D (2-5), were isolated from the leaves of the Australian endemic plant Austrobuxus swainii (Beuzev. & C.T. White) Airy Shaw. The chemical structure of 1 was elucidated by 1D- and 2D-NMR spectroscopy, along with MS data. The sugar moiety in 1 was determined to be β-D-glucose by acid hydrolysis and subsequent comparison of its specific rotation with that of standard. The relative configuration of the aglycone was assigned by ROESY NMR experiment and density functional theory (DFT) calculation of NMR data coupled with DP4 analysis. Cytotoxicity test revealed that compound 1 exhibited 71% inhibition against Caco-2 cell line at the concentration of 166 µM.
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Affiliation(s)
- Jiayu Zhang
- Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD, Australia
| | - Duy Thanh Nguyen
- Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD, Australia
| | - Gregory K Pierens
- Centre for Advanced Imaging, The University of Queensland, St Lucia, QLD, Australia
| | - Ian Cock
- School of Environment and Science, Griffith University, Nathan, QLD, Australia
| | - Yunjiang Feng
- Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD, Australia
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16
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Ossipov V, Koivuniemi A, Mizina P, Salminen JP. UPLC-PDA-Q Exactive Orbitrap-MS profiling of the lipophilic compounds product isolated from Eucalyptus viminalis plants. Heliyon 2020; 6:e05768. [PMID: 33385084 PMCID: PMC7772544 DOI: 10.1016/j.heliyon.2020.e05768] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 07/23/2020] [Accepted: 12/15/2020] [Indexed: 01/08/2023] Open
Abstract
The lipophilic compounds product (LCP), which was isolated and purified from Eucalyptus viminalis plants, has shown earlier broad antimicrobial and anti-inflammatory activities. To study secondary compounds responsible for the pharmacological activities, chemical composition of the LCP was studied with application of ultra-performance liquid chromatography combined with photodiode array detector and high-resolution Q Exactive Orbitrap mass spectrometer (UPLC-PDA-HRMS/MS). There were found thirty two compounds: twenty phloroglucinol derivatives (isopentyl diformyl phloroglucinol, macrocarpals, sideroxylonals, etc.), eight ursane type triterpenoids (loxanic acid, dehydroursolic acid lactone, dehydroursolic acid lactone acetate, two isomers of p-coumaroyl-dehydroursolic acid lactone and two isomers of feruloyl-dehydroursolic acid lactone), sequiterpenoid (S)-β-macrocarpene and three unknown phenolics. The major compounds of the LCP were pharmacologically active macrocarpals A and B, dehydroursolic acid lactone and its derivatives. It is supposed that previously discovered antimicrobial and anti-inflammatory activities of the LCP is due to the high contents of these secondary compounds.
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Affiliation(s)
- Vladimir Ossipov
- Natural Chemistry Research Group, Department of Chemistry, FI-20014 University of Turku, Finland
- All-Russian Institute of Medicinal and Aromatic Plants, 117216, Moscow, Grina 7, Russian Federation
| | - Anne Koivuniemi
- Natural Chemistry Research Group, Department of Chemistry, FI-20014 University of Turku, Finland
| | - Praskovia Mizina
- All-Russian Institute of Medicinal and Aromatic Plants, 117216, Moscow, Grina 7, Russian Federation
| | - Juha-Pekka Salminen
- Natural Chemistry Research Group, Department of Chemistry, FI-20014 University of Turku, Finland
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17
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Hua D, Zhao Q, Yu Y, Yu H, Yu L, Zhou X, Wang Q, Sun C, Shi C, Luo W, Jiang Z, Wang W, Wang L, Zhang D, Tang S, Yu S. Eucalyptal A inhibits glioma by rectifying oncogenic splicing of MYO1B mRNA via suppressing SRSF1 expression. Eur J Pharmacol 2020; 890:173669. [PMID: 33098832 DOI: 10.1016/j.ejphar.2020.173669] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 10/17/2020] [Accepted: 10/21/2020] [Indexed: 12/23/2022]
Abstract
Glioma is the most common primary intracranial tumor, in which glioblastoma (GBM) is the most malignant and lethal. However, the current chemotherapy drugs are still unsatisfactory for GBM therapy. As the natural products mainly extracted from Eucalyptus species, phloroglucinol-terpene adducts have the potential to be anti-cancer lead compounds that attracted increasing attention. In order to discover the new lead compounds with the anti-GBM ability, we isolated Eucalyptal A with a phloroglucinol-terpene skeleton from the fruit of E. globulus and investigated its anti-GBM activity in vitro and in vivo. Functionally, we verified that Eucalyptal A could inhibit the proliferation, growth and invasiveness of GBM cells in vitro. Moreover, Eucalyptal A had the same anti-GBM activity in tumor-bearing mice as in vitro and prolonged the overall survival time by maintaining mice body weight. Further mechanism research revealed that Eucalyptal A downregulated SRSF1 expression and rectified SRSF1-guided abnormal alternative splicing of MYO1B mRNA, which led to anti-GBM activity through the PDK1/AKT/c-Myc and PAK/Cofilin axes. Taken together, we identified Eucalyptal A as an important anti-GBM lead compound, which represents a novel direction for glioma therapy.
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Affiliation(s)
- Dan Hua
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300052, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, Tianjin, 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, 300052, China
| | - Qian Zhao
- Department of Sports Injury and Arthroscopy, Tianjin University Tianjin Hospital, Tianjin, 300221, China
| | - Yang Yu
- Department of Pulmonary and Critical Care Medicine, Tianjin Chest Hospital, Tianjin, 300222, China
| | - Huan Yu
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, 300070, Tianjin, China
| | - Lin Yu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences of Tianjin Medical University, Tianjin, 300070, China
| | - Xuexia Zhou
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300052, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, Tianjin, 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, 300052, China
| | - Qian Wang
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300052, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, Tianjin, 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, 300052, China
| | - Cuiyun Sun
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300052, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, Tianjin, 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, 300052, China
| | - Cuijuan Shi
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300052, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, Tianjin, 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, 300052, China
| | - Wenjun Luo
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300052, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, Tianjin, 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, 300052, China
| | - Zhendong Jiang
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300052, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, Tianjin, 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, 300052, China
| | - Weiting Wang
- Tianjin Institute of Pharmaceutical Research, Tianjin, 300301, China
| | - Lingli Wang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, 300070, Tianjin, China
| | - Dongli Zhang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, 300070, Tianjin, China
| | - Shengan Tang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, 300070, Tianjin, China.
| | - Shizhu Yu
- Department of Neuropathology, Tianjin Neurological Institute, Tianjin Medical University General Hospital, Tianjin, 300052, China; Tianjin Key Laboratory of Injuries, Variations and Regeneration of the Nervous System, Tianjin, 300052, China; Key Laboratory of Post-trauma Neuro-repair and Regeneration in Central Nervous System, Ministry of Education, Tianjin, 300052, China.
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18
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Zhong LF, Shang ZC, Sun FJ, Zhu PH, Yin Y, Kong LY, Yang MH. Anticandidal formyl phloroglucinol meroterpenoids: Biomimetic synthesis and in vitro evaluation. Bioorg Chem 2020; 104:104248. [PMID: 32916392 DOI: 10.1016/j.bioorg.2020.104248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 05/15/2020] [Accepted: 08/28/2020] [Indexed: 02/05/2023]
Abstract
Inspired by the diversity-oriented synthesis, some novel formyl phloroglucinol meroterpenoids were synthesized via biomimetic synthesis using essential oils. Eight of them were demonstrated with good in vitro fungicidal activity against Candida albicans and C. glabrata. Compound c2 showed the best anticandidal ability that was powerfully comparable to fluconazole when testing against several strains in vitro. The antibiofilm activity was also found for the c2 treating group which was evidenced to block the hyphal elongation and filamentation of C. albicans. Therefore, compound c2 is a promising candidate for further antifungal-based structure modification.
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Affiliation(s)
- Lin-Fang Zhong
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Zhi-Chun Shang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Fu-Juan Sun
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Pan-Hu Zhu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Yong Yin
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China
| | - Ling-Yi Kong
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China.
| | - Ming-Hua Yang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing 210009, People's Republic of China.
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19
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Luo SL, Hu LJ, Huang XJ, Su JC, Shao XH, Wang L, Xu HH, Li CC, Wang Y, Ye WC. Discovery and Biomimetic Synthesis of a Phloroglucinol-Terpene Adduct Collection from Baeckea frutescens and Its Biogenetic Origin Insight. Chemistry 2020; 26:11104-11108. [PMID: 32315480 DOI: 10.1002/chem.202001111] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Indexed: 01/20/2023]
Abstract
A phloroglucinol-terpene adduct (PTA) collection consisting of twenty-four molecules featuring three skeletons was discovered from Baeckea frutescens. Inspired by its biosynthetic hypothesis, we synthesized this PTA collection by reductive activation of stable phloroglucinol precursors into highly reactive ortho-quinone methide (o-QM) intermediates and subsequently Diels-Alder cycloaddition. We also demonstrated, for the first time, the generation process of the active o-QM by performing dynamic NMR and HPLC-MS monitoring experiments. Moreover, the PTA collection showed significant antifeedant effect toward the Plutella xylostella larvae.
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Affiliation(s)
- Shi-Lin Luo
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Li-Jun Hu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Xiao-Jun Huang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Jun-Cheng Su
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Xue-Hua Shao
- Institute of Fruit Tree Research, Guangdong Academy of, Agricultural Sciences, Guangzhou, 510640, P. R. China
| | - Lei Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Han-Hong Xu
- State Key Laboratory for Conservation and Utilization of, Subtropical Agro-bioresources, South China Agricultural University, Guangzhou, 510642, P. R. China
| | - Chuang-Chuang Li
- Department of Chemistry, South University of Science and Technology of China, Shenzhen, 518055, P. R. China
| | - Ying Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy, Jinan University, Guangzhou, 510632, P. R. China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of, TCM and New Drugs Research, Jinan University, Guangzhou, 510632, P. R. China
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20
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Deng X, Wang XR, Wu L. Triketone-terpene meroterpenoids from the leaves of Rhodomyrtus tomentosa. Fitoterapia 2020; 143:104585. [PMID: 32247054 DOI: 10.1016/j.fitote.2020.104585] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/28/2020] [Accepted: 03/30/2020] [Indexed: 11/16/2022]
Abstract
Eight new meroterpenoids (1-8) featuring β-triketone-conjugated terpenoids, rtomentones A-H, were isolated from the leaves of Rhodomyrtus tomentosa. Structures of the isolates were unambiguously established by a combination of NMR and ECD spectroscopy and X-ray diffraction analysis. Rtomentone C (3) was the first example of aromadendrane-based meroterpenoid containing an oxa-spiro[5.6] ring. Rtomentone D (4) was obtained as a racemic mixture confirmed by chiral HPLC analysis. The cytotoxicity against MDA-MB-231, A549, and DLD-1 cells of all isolates was evaluated.
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Affiliation(s)
- Xin Deng
- School of Pharmacy, Anhui Medical University, Hefei 230032, People's Republic of China
| | - Xiu-Rong Wang
- School of Pharmacy, Anhui Medical University, Hefei 230032, People's Republic of China
| | - Lin Wu
- School of Pharmacy, Anhui Medical University, Hefei 230032, People's Republic of China.
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21
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Song JG, Su JC, Song QY, Huang RL, Tang W, Hu LJ, Huang XJ, Jiang RW, Li YL, Ye WC, Wang Y. Cleistocaltones A and B, Antiviral Phloroglucinol-Terpenoid Adducts from Cleistocalyx operculatus. Org Lett 2019; 21:9579-9583. [PMID: 31755722 DOI: 10.1021/acs.orglett.9b03743] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Two novel phloroglucinol-terpenoid adducts (1 and 2), featuring a rare 2,2,4-trimethyl-cinnamyl-β-triketone unit, were isolated from the buds of Cleistocalyx operculatus. Their structures with absolute configurations were established by spectroscopic analyses, single-crystal X-ray diffraction, and quantum chemical calculations. Structurally, compound 1 represents a new carbon skeleton possessing a densely functionalized tricyclo[11.3.1.03;8]heptadecane bridged ring system with an unusual bridgehead enol. Compounds 1 and 2 exhibited significant in vitro antiviral activities against respiratory syncytial virus (RSV).
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Affiliation(s)
- Jian-Guo Song
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Jun-Cheng Su
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Qiao-Yun Song
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Rui-Li Huang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Wei Tang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Li-Jun Hu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Xiao-Jun Huang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Ren-Wang Jiang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Yao-Lan Li
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Ying Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy , Jinan University , Guangzhou 510632 , People's Republic of China.,Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM & New Drugs Research , Jinan University , Guangzhou 510632 , People's Republic of China
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22
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Tyrosinase inhibitors from the leaves of Eucalyptus globulus. Fitoterapia 2019; 139:104418. [PMID: 31704262 DOI: 10.1016/j.fitote.2019.104418] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 10/31/2019] [Accepted: 11/04/2019] [Indexed: 11/24/2022]
Abstract
A new isoiphionane sesquiterpene, named (3S, 5S, 7S, 10R)-3, 11-dihydroxyisoiphion-4-one (1), two new phloroglucinol glycosides, named eucalglobuside A (2) and eucalglobuside B (3), along with 15 known compounds were isolated from the leaves of Eucalyptus globulus. Their structures were elucidated based on extensive spectroscopic analysis and in comparison with literature data. The absolute configuration of compound 1 was determined by ECD calculation. All isolates were evaluated their inhibitory activities against the mushroom tyrosinase. As a result, three sesquiterpenoids, 1, 5β, 11-dihydroxy-iphionan-4-one (5), and (-)-globulol (8), exhibited the most potent activities with IC50 values of 14.17 μM, 10.08 μM and 9.79 μM, respectively.
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23
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Shang ZC, Han C, Xu JL, Liu RH, Yin Y, Wang XB, Yang MH, Kong LY. Twelve formyl phloroglucinol meroterpenoids from the leaves of Eucalyptus robusta. PHYTOCHEMISTRY 2019; 163:111-117. [PMID: 31039475 DOI: 10.1016/j.phytochem.2019.04.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 12/28/2018] [Accepted: 04/16/2019] [Indexed: 06/09/2023]
Abstract
Twelve formyl phloroglucinol meroterpenoids (FPMs) were isolated from the leaves of Eucalyptus robusta Smith. Their structures were elucidated via spectroscopic data analysis, the circular dichroism (CD) exciton chirality method, Rh2(OCOCF3)4-induced CD experiments, and application of the Snatzke chirality rules. Eucalrobusones Q, S, and X are the first FPMs that have been identified in which the C-7' of phloroglucinol is linked to the C-15 of cadinane, the C-4 of cubebane, and the C-8 of menthane, respectively. (+)-Eucalrobusone X exhibited the most potent antifungal ability against Candida albicans with a MIC50 value of 10.78 μg/mL, and eucalrobusone U exhibited the greatest anti-C. glabrata activity with MIC50 value of 1.53 μg/mL.
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Affiliation(s)
- Zhi-Chun Shang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Chao Han
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Jia-Li Xu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Rui-Huan Liu
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Yong Yin
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Xiao-Bing Wang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Ming-Hua Yang
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China
| | - Ling-Yi Kong
- Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing, 210009, People's Republic of China.
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24
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Pham TA, Hu XL, Huang XJ, Ma MX, Feng JH, Li JY, Hou JQ, Zhang PL, Nguyen VH, Nguyen MT, Xiong F, Fan CL, Zhang XQ, Ye WC, Wang H. Phloroglucinols with Immunosuppressive Activities from the Fruits of Eucalyptus globulus. JOURNAL OF NATURAL PRODUCTS 2019; 82:859-869. [PMID: 30848923 DOI: 10.1021/acs.jnatprod.8b00920] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Five new phloroglucinol derivatives, eucalyptins C-G (1-5), together with 13 known analogues (6-18) were isolated from the fruits of Eucalyptus globulus. The structures and absolute configurations of 1-5 were established by means of spectroscopic data analysis, computational calculation methods, and single-crystal X-ray diffraction. Compounds 1-18 were investigated for their immunosuppressive effects in vitro, and 1, 2, 6, and 7 displayed moderate inhibitory activities with IC50 values of 11.8, 10.2, 18.2, and 19.1 μM, respectively. The stimulation index (SI) of 1 was 64.2 and was compared to that of cyclosporine A (SI = 149.57). Further study demonstrated that 1 exhibited an immunosuppressive effect through inducing apoptosis and inhibiting cytokine secretion.
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Affiliation(s)
- Thi-Anh Pham
- State Key Laboratory of Natural Medicines, Department of TCM Pharmaceuticals, School of Traditional Chinese Pharmacy , China Pharmaceutical University , Nanjing 210009 , People's Republic of China
- Department of Traditional Medicine, School of Pharmacy , Haiphong University of Medicine and Pharmacy , 72 A Nguyen Binh Khiem , Haiphong City , Vietnam
| | - Xiao-Long Hu
- State Key Laboratory of Natural Medicines, Department of TCM Pharmaceuticals, School of Traditional Chinese Pharmacy , China Pharmaceutical University , Nanjing 210009 , People's Republic of China
| | - Xiao-Jun Huang
- Institute of Traditional Chinese Medicine and Natural Products , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Ming-Xi Ma
- State Key Laboratory of Bioelectronics, Jiangsu Laboratory for Biomaterials and Devices , Southeast University , Nanjing 210009 , People's Republic of China
| | - Jia-Hao Feng
- State Key Laboratory of Natural Medicines, Department of TCM Pharmaceuticals, School of Traditional Chinese Pharmacy , China Pharmaceutical University , Nanjing 210009 , People's Republic of China
| | - Jun-Yan Li
- State Key Laboratory of Natural Medicines, Department of TCM Pharmaceuticals, School of Traditional Chinese Pharmacy , China Pharmaceutical University , Nanjing 210009 , People's Republic of China
| | - Ji-Qin Hou
- State Key Laboratory of Natural Medicines, Department of TCM Pharmaceuticals, School of Traditional Chinese Pharmacy , China Pharmaceutical University , Nanjing 210009 , People's Republic of China
| | - Pei-Lin Zhang
- State Key Laboratory of Natural Medicines, Department of TCM Pharmaceuticals, School of Traditional Chinese Pharmacy , China Pharmaceutical University , Nanjing 210009 , People's Republic of China
| | - Van-Hung Nguyen
- Department of Traditional Medicine, School of Pharmacy , Haiphong University of Medicine and Pharmacy , 72 A Nguyen Binh Khiem , Haiphong City , Vietnam
| | - Manh-Tuyen Nguyen
- Department of Traditional Medicine , Hanoi University of Pharmacy , 13-15 Le Thanh Tong, Hoan Kiem , Hanoi , Vietnam
| | - Fei Xiong
- State Key Laboratory of Bioelectronics, Jiangsu Laboratory for Biomaterials and Devices , Southeast University , Nanjing 210009 , People's Republic of China
| | - Chun-Lin Fan
- Institute of Traditional Chinese Medicine and Natural Products , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Xiao-Qi Zhang
- Institute of Traditional Chinese Medicine and Natural Products , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Wen-Cai Ye
- Institute of Traditional Chinese Medicine and Natural Products , Jinan University , Guangzhou 510632 , People's Republic of China
| | - Hao Wang
- State Key Laboratory of Natural Medicines, Department of TCM Pharmaceuticals, School of Traditional Chinese Pharmacy , China Pharmaceutical University , Nanjing 210009 , People's Republic of China
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25
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Qin XJ, Jin LY, Yu Q, Liu H, Khan A, Yan H, Hao XJ, An LK, Liu HY. Eucalypglobulusals A-J, Formyl-Phloroglucinol-Terpene Meroterpenoids from Eucalyptus globulus Fruits. JOURNAL OF NATURAL PRODUCTS 2018; 81:2638-2646. [PMID: 30543429 DOI: 10.1021/acs.jnatprod.8b00430] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Ten new formyl-phloroglucinol-terpene meroterpenoids, eucalypglobulusals A-J (1-10), and ten known analogues were isolated from Eucalyptus globulus fruits. The structures of 1-10 were determined by spectroscopic analysis, while their absolute configurations were established using calculated and experimental electronic circular dichroism (ECD) spectra. Eucalypglobulusal A was assigned as a new formyl-phloroglucinol-terpene meroterpenoid with a rearranged sesquiterpene skeleton, and an aldol condensation between C-3 and C-5 of the germacrene C moiety was proposed to be a key step in its putative biosynthetic pathway. Eucalypglobulusal F exhibited cytotoxicity against the human acute lymphoblastic cell line (CCRF-CEM) with an IC50 value of 3.3 μM, while eucalypglobulusal A, eucarobustol C, macrocarpal A, macrocarpal B, and macrocarpal D exhibited DNA topoisomerase I (Top1) inhibition. The compounds eucalypglobulusal A and macrocarpal A act as Top1 catalytic inhibitors and delay Top1 poison-mediated DNA double-strand damage.
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Affiliation(s)
- Xu-Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , People's Republic of China
| | - Ling-Yu Jin
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , People's Republic of China
- School of Traditional Dai-Thai Medicine , West Yunnan University of Applied Sciences , Jinghong 666100 , People's Republic of China
| | - Qian Yu
- Institute of Medicinal Chemistry and Chemical Biology, School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , People's Republic of China
| | - Hui Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , People's Republic of China
| | - Afsar Khan
- Department of Chemistry , COMSATS University Islamabad, Abbottabad Campus , Abbottabad - 22060 , Pakistan
| | - Huan Yan
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , People's Republic of China
| | - Xiao-Jiang Hao
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , People's Republic of China
| | - Lin-Kun An
- Institute of Medicinal Chemistry and Chemical Biology, School of Pharmaceutical Sciences , Sun Yat-sen University , Guangzhou 510006 , People's Republic of China
| | - Hai-Yang Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming 650201 , People's Republic of China
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26
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Qin XJ, Feng MY, Liu H, Ni W, Rauwolf T, Porco JA, Yan H, He L, Liu HY. Eucalyptusdimers A-C, Dimeric Phloroglucinol-Phellandrene Meroterpenoids from Eucalyptus robusta. Org Lett 2018; 20:5066-5070. [PMID: 30088934 PMCID: PMC6132224 DOI: 10.1021/acs.orglett.8b02259] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Eucalyptusdimers A-C, three dimeric phellandrene-derived meroterpenoids featuring an unprecedented, fused skeleton between two phellandrene and two acylphloroglucinol subunits, along with one biogenetically related intermediate, (±)-eucalyprobusone A, were isolated from the fruits of Eucalyptus robusta. Their structures and absolute configurations were elucidated using spectroscopic data, X-ray crystallography, and electronic circular dichroism analysis. The isolated meroterpenoids were evaluated for their anti-inflammatory, acetylcholinesterase inhibitory, and protein tyrosine phosphatase 1B inhibitory effects.
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Affiliation(s)
- Xu-Jie Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming 650201, People’s Republic of China
| | - Mi-Yan Feng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming 650201, People’s Republic of China
| | - Hui Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming 650201, People’s Republic of China
| | - Wei Ni
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming 650201, People’s Republic of China
| | - Tyler Rauwolf
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - John A. Porco
- Department of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Huan Yan
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming 650201, People’s Republic of China
| | - Li He
- Department of Dermatology, The First Affiliated Hospital of Kunming Medical University, Kunming 650032, People’s Republic of China
| | - Hai-Yang Liu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming 650201, People’s Republic of China
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27
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Pham TA, Shair Mohammad I, Vu VT, Hu XL, Birendra C, Ulah A, Guo C, Lü XY, Ye WC, Wang H. Phloroglucinol Derivatives from the Fruits of Eucalyptus globulus and Their Cytotoxic Activities. Chem Biodivers 2018; 15:e1800052. [PMID: 29692000 DOI: 10.1002/cbdv.201800052] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 04/19/2018] [Indexed: 11/07/2022]
Abstract
A new phloroglucinol derivative, named eucalyptin B (1), along with five related known compounds (2 - 6), was isolated from the fruits of Eucalyptus globulus. Their structures were elucidated by means of 1D- and 2D-NMR spectroscopy, with the absolute configuration of 1 determined by electronic circular dichroism (ECD) calculations. All isolated compounds (1 - 6) were evaluated for their cytotoxic activities against lung (A549), breast (4T1), and skin (B16F10) cancer cell lines. On the basis of cell viability assay, the cytotoxic activity of eucalyptin B (1) was further confirmed by apoptosis assay. Additionally, after treatment with eucalyptin B (1), the apoptosis factor proteins (Bcl2 and Bax) and caspase-3 levels in A549 cells were also determined by Western-blot analysis. By cytotoxic assay, eucalyptin B (1) exhibited potent cytotoxicity against A549 cells with an IC50 value of 1.51 μm and induced concentration dependent apoptosis of up to 49%. Additionally, eucalyptin B (1) inhibited 5-fold and increased 10-folds in the level of Bcl2 and Bax, respectively. Furthermore, the 11-fold increase in the level of caspase-3 confirmed eucalyptin B (1) activated caspase dependent apoptosis pathway. In conclusion, the isolated compound eucalyptin B (1) has promising cytotoxic activity in tumor cells, especially in A549.
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Affiliation(s)
- Thi-Anh Pham
- State Key Laboratory of Natural Medicines, Department of TCMs Pharmaceuticals, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Imran Shair Mohammad
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Van-Tuan Vu
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Xiao-Long Hu
- State Key Laboratory of Natural Medicines, Department of TCMs Pharmaceuticals, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Chaurasiya Birendra
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Aftab Ulah
- Department of Pharmaceutics, School of Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Cui Guo
- State Key Laboratory of Natural Medicines, Department of TCMs Pharmaceuticals, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Xian-Yu Lü
- State Key Laboratory of Natural Medicines, Department of TCMs Pharmaceuticals, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
| | - Wen-Cai Ye
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drug Research, Jinan University, Guangzhou, 510632, P. R. China
| | - Hao Wang
- State Key Laboratory of Natural Medicines, Department of TCMs Pharmaceuticals, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 210009, P. R. China
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28
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Hou JQ, Guo C, Zhao JJ, Dong YY, Hu XL, He QW, Zhang BB, Yan M, Wang H. Anti-inflammatory Meroterpenoids from Baeckea frutescens. JOURNAL OF NATURAL PRODUCTS 2017; 80:2204-2214. [PMID: 28753309 DOI: 10.1021/acs.jnatprod.7b00042] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Frutescones H-R (1-11), new sesqui- or monoterpene-based meroterpenoids, were isolated from the aerial parts of Baeckea frutescens. Their structures and absolute configurations were established by means of spectroscopic analyses (HRESIMS, 1D and 2D NMR, and ECD), as well as single-crystal X-ray crystallography of 1, (-)-7, and 9. The anti-inflammatory activities of all isolates were evaluated by measuring their inhibitory effects on NO production in LPS-stimulated RAW 264.7 macrophages, and the structure-activity relationships of 1-11 are also discussed. Compound 8 exhibited anti-inflammatory activity with an IC50 value of 0.36 μM, which might be related to the regulation of the NF-κB signaling pathway via the suppression of p65 nuclear translocation and the consequent decrease of IL-6 and TNF-α.
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Affiliation(s)
- Ji-Qin Hou
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, and ‡Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University , Nanjing 210009, People's Republic of China
| | - Cui Guo
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, and ‡Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University , Nanjing 210009, People's Republic of China
| | - Jian-Juan Zhao
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, and ‡Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University , Nanjing 210009, People's Republic of China
| | - Yang-Yang Dong
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, and ‡Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University , Nanjing 210009, People's Republic of China
| | - Xiao-Long Hu
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, and ‡Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University , Nanjing 210009, People's Republic of China
| | - Qi-Wei He
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, and ‡Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University , Nanjing 210009, People's Republic of China
| | - Bao-Bao Zhang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, and ‡Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University , Nanjing 210009, People's Republic of China
| | - Ming Yan
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, and ‡Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University , Nanjing 210009, People's Republic of China
| | - Hao Wang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, and ‡Jiangsu Key Laboratory of Drug Screening, China Pharmaceutical University , Nanjing 210009, People's Republic of China
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29
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In Vitro Antibiofilm Activity of Eucarobustol E against Candida albicans. Antimicrob Agents Chemother 2017; 61:AAC.02707-16. [PMID: 28584159 DOI: 10.1128/aac.02707-16] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 05/20/2017] [Indexed: 12/23/2022] Open
Abstract
Formyl-phloroglucinol meroterpenoids (FPMs) are important types of natural products with various bioactivities. Our antifungal susceptibility assay showed that one of the Eucalyptus robusta-derived FPMs, eucarobustol E (EE), exerted a strong inhibitory effect against Candida albicans biofilms at a concentration of 16 μg/ml. EE was found to block the yeast-to-hypha transition and reduce the cellular surface hydrophobicity of the biofilm cells. RNA sequencing and real-time reverse transcription-PCR analysis showed that exposure to 16 μg/ml of EE resulted in marked reductions in the levels of expressions of genes involved in hyphal growth (EFG1, CPH1, TEC1, EED1, UME6, and HGC1) and cell surface protein genes (ALS3, HWP1, and SAP5). Interestingly, in response to EE, genes involved in ergosterol biosynthesis were downregulated, while the farnesol-encoding gene (DPP3) was upregulated, and these findings were in agreement with those from the quantification of ergosterol and farnesol. Combined with the obvious elevation of negative regulator genes (TUP1, NRG1), we speculated that EE's inhibition of carbon flow to ergosterol triggered the mechanisms of the negative regulation of hyphal growth and eventually led to biofilm inhibition.
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30
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Jian KL, Zhang C, Shang ZC, Yang L, Kong LY. Eucalrobusone C suppresses cell proliferation and induces ROS-dependent mitochondrial apoptosis via the p38 MAPK pathway in hepatocellular carcinoma cells. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2017; 25:71-82. [PMID: 28190473 DOI: 10.1016/j.phymed.2016.12.014] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 12/17/2016] [Accepted: 12/23/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Eucalyptus extracts have anti-cancer activity against various cancer cells. Formyl-phloroglucinol meroterpenoids (FPMs), which are typical secondary metabolites of the genera Eucalyptus, have many important pharmacological activities. PURPOSE Eucalrobusone C (EC), a new bioactive phytochemical, was first isolated from the leaves of Eucalyptus robusta in our laboratory. EC is a FPM, and our previous research revealed that EC showed strongest cytotoxicity in three cancer models than other compounds isolated from the leaves of E. robusta. This study investigated its anti-tumor effects on human hepatocellular carcinoma (HCC) and its underlying mechanisms. METHODS Cell viability was measured by MTT assay. Cell cycle, apoptosis and mitochondrial transmembrane potential were determined by flow cytometry. Immunofluorescence was determined by a laser scanning confocal microscope. Protein levels were analyzed by Western blotting. RESULTS Our results showed that EC exerted strong anti-proliferative activity against HCC cells in a concentration- and time-dependent manner. EC markedly induced apoptosis through the caspase-dependent mitochondrial pathway, and the cell cycle was arrested at S phase. SB203580, a p38 MAPK inhibitor, effectively decreased cell death caused by EC. Moreover, the ROS scavenger N-acetyl cysteine (NAC) significantly attenuated apoptosis induced by EC and reversed EC-induced p38 MAPK activation. CONCLUSION Our findings indicate that EC induces mitochondrial-dependent apoptosis in HCC cells through ROS generation and p38 MAPK activation, making EC a promising candidate for further development as an anticancer agent for HCC cells.
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Affiliation(s)
- Kai-Li Jian
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Chao Zhang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Zhi-Chun Shang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China
| | - Lei Yang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China.
| | - Ling-Yi Kong
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People's Republic of China.
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Chen M, Chen LF, Li MM, Li NP, Cao JQ, Wang Y, Li YL, Wang L, Ye WC. Myrtucomvalones A–C, three unusual triketone–sesquiterpene adducts from the leaves of Myrtus communis ‘Variegata’. RSC Adv 2017. [DOI: 10.1039/c7ra02260c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The first examples of triketone–cubebane adducts (1 and 2) with an unusual skeleton were isolated from Myrtus communis ‘Variegata’.
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Affiliation(s)
- Ming Chen
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- P. R. China
- Institute of Traditional Chinese Medicine & Natural Products
| | - Li-Feng Chen
- Institute of Traditional Chinese Medicine & Natural Products
- JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research
- College of Pharmacy
- Jinan University
- Guangzhou 510632
| | - Man-Mei Li
- Institute of Traditional Chinese Medicine & Natural Products
- JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research
- College of Pharmacy
- Jinan University
- Guangzhou 510632
| | - Ni-Ping Li
- Institute of Traditional Chinese Medicine & Natural Products
- JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research
- College of Pharmacy
- Jinan University
- Guangzhou 510632
| | - Jia-Qing Cao
- Institute of Traditional Chinese Medicine & Natural Products
- JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research
- College of Pharmacy
- Jinan University
- Guangzhou 510632
| | - Ying Wang
- Institute of Traditional Chinese Medicine & Natural Products
- JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research
- College of Pharmacy
- Jinan University
- Guangzhou 510632
| | - Yao-Lan Li
- Institute of Traditional Chinese Medicine & Natural Products
- JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research
- College of Pharmacy
- Jinan University
- Guangzhou 510632
| | - Lei Wang
- Institute of Traditional Chinese Medicine & Natural Products
- JNU-HKUST Joint Laboratory for Neuroscience & Innovative Drug Research
- College of Pharmacy
- Jinan University
- Guangzhou 510632
| | - Wen-Cai Ye
- Department of Natural Medicinal Chemistry
- China Pharmaceutical University
- Nanjing 210009
- P. R. China
- Institute of Traditional Chinese Medicine & Natural Products
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Shang ZC, Yang MH, Liu RH, Wang XB, Kong LY. New Formyl Phloroglucinol Meroterpenoids from the Leaves of Eucalyptus robusta. Sci Rep 2016; 6:39815. [PMID: 28004790 PMCID: PMC5177953 DOI: 10.1038/srep39815] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 11/28/2016] [Indexed: 11/09/2022] Open
Abstract
Seven new formyl phloroglucinol meroterpenoids (FPMs), namely eucalrobusones J-P (1–7), as well as three known ones (8–10) were isolated from the leaves of Eucalyptus robusta. Their structures were elucidated by spectroscopic data analysis, and their absolute configurations were determined by applications of the Snatzke’s helicity rule and the electron circular dichroism (ECD) calculation. These FPMs are diverse in coupling patterns between phloroglucinol and sesquiterpenoid units, forming novel polycyclic ring systems. Compound 1 possesses a new carbon skeleton that a 1-oxaspiro[5.6]dodecane core is formed through C-14 rather than C-4 of the aromadendrane moiety. Compound 2 features a novel 6/7/5 ring-fused 6-oxabicyclo[3.2.2]nonane skeleton. Compounds 3–5 are rare aristolane-based FPMs. By forming different oxo bridges, compound 3 is the first sample of FPM with benzo-dihydrofuran structure, and compound 4 possesses a novel 6/6/6/6/3-fused pentacyclic skeleton. Compounds 1, 6, and 8 exhibited significant antifungal activities against Candida glabrata with MIC50 values of 2.57, 1.95, and 2.49 μg/mL, respectively.
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Affiliation(s)
- Zhi-Chun Shang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People' s Republic of China
| | - Ming-Hua Yang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People' s Republic of China
| | - Rui-Huan Liu
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People' s Republic of China
| | - Xiao-Bing Wang
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People' s Republic of China
| | - Ling-Yi Kong
- State Key Laboratory of Natural Medicines, Department of Natural Medicinal Chemistry, China Pharmaceutical University, 24 Tong Jia Xiang, Nanjing 210009, People' s Republic of China
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Abstract
A personal selection of 32 recent papers is presented covering various aspects of current developments in bioorganic chemistry and novel natural products such as chrysamide A from a deep-sea fungus Penicillium chrysogenum.
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