1
|
Ahmed BH, Desta MA, Wami AA, Beyene GT, Bedane KG. Sesquiterpene Acids and Lactones from Inula Confertiflora with their Antibacterial Activities. Chem Biodivers 2024; 21:e202400265. [PMID: 38470349 DOI: 10.1002/cbdv.202400265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 03/04/2024] [Accepted: 03/12/2024] [Indexed: 03/13/2024]
Abstract
The phytochemical investigation of the leaves of Inula confertiflora, a medicinal plant endemic to Ethiopia, led to the isolation of 15 terpenoids; 1β-hydroxy-α-costic acid (1), 3α-hydroxycostic acid (2), isotelekin (3), asperilin (4), carabrone (5), carpesioline (6), graveolide (7), inuviscolide (8), 8-epi-inuviscolide (9), 1β,4β-dihydroxy-5α(H)-guaia-10(14),11(13)-dien-8α,12-olide (10), isoinuviscolide (11), 4β,10β-dihydroxy-5α(H)-1,11(13)-guaidien-8α,12-olide (12), 4β,10β-dihydroxy-1β(H)-5α(H)-guai-11(13)-en-8α,12-olide (13), 4β,10α-dihydroxy-1β(H)-5α(H)-guai-11(13)-en-8α,12-olide (14), 4β,10α-dihydroxy-1α(H)-5α(H)-guai-11(13)-en-8α,12-olide (15). Herein, structural elucidation and full NMR data for compound 1 are presented for the first time. The structures were elucidated using NMR, HRESIMS, and by comparison with literature data. The relative configurations were defined by NOESY correlations and single-crystal X-ray crystallography. Herein, crystallography data of 6 and 7 were reported for the first time. The antibacterial efficacy of some of the isolated compounds was evaluated against two commonly dispersed environmental strains of Escherichia coli and Staphylococcus aureus. Compounds 1, 3, 6, 7, and 8 exhibited moderate antibacterial activities against the tested organisms. The chemotaxonomic significance of compounds is discussed.
Collapse
Affiliation(s)
- Bonsa Hussein Ahmed
- Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, P.O. Box, 1176, Addis Ababa, Ethiopia
| | - Mekonnen Abebayehu Desta
- Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, P.O. Box, 1176, Addis Ababa, Ethiopia
| | - Ashenafi Alemu Wami
- Armauer Hansen Research Institute (AHRI), ALERT Hospital, Addis Ababa, Ethiopia
| | | | - Kibrom Gebreheiwot Bedane
- Department of Chemistry, College of Natural and Computational Sciences, Addis Ababa University, P.O. Box, 1176, Addis Ababa, Ethiopia
| |
Collapse
|
2
|
Zhao M, Ye N, Liu L, Zhang RJ, Li N, Peng J, Cai XY, Jiang XQ, Su KY, Zhang XL, Rao QR, Liu KJ, Deng DX, Peng AH, Tang MH, Chen LJ, Wu WS, Ye HY. Novel Isoalantolactone-Based Derivatives as Potent NLRP3 Inflammasome Inhibitors: Design, Synthesis, and Biological Characterization. J Med Chem 2024. [PMID: 38686671 DOI: 10.1021/acs.jmedchem.4c00357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
The NLRP3 inflammasome has been recognized as a promising therapeutic target in drug discovery for inflammatory diseases. Our initial research identified a natural sesquiterpene isoalantolactone (IAL) as the active scaffold targeting NLRP3 inflammasome. To improve its activity and metabolic stability, a total of 64 IAL derivatives were designed and synthesized. Among them, compound 49 emerged as the optimal lead, displaying the most potent inhibitory efficacy on nigericin-induced IL-1β release in THP-1 cells, with an IC50 value of 0.29 μM, approximately 27-fold more potent than that of IAL (IC50: 7.86 μM), and exhibiting higher metabolic stability. Importantly, 49 remarkably improved DSS-induced ulcerative colitis in vivo. Mechanistically, we demonstrated that 49 covalently bound to cysteine 279 in the NACHT domain of NLRP3, thereby inhibiting the assembly and activation of NLRP3 inflammasome. These results provided compelling evidence to further advance the development of more potent NLRP3 inhibitors based on this scaffold.
Collapse
Affiliation(s)
- Min Zhao
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu 610041, China
| | - Neng Ye
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Ling Liu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Rui-Jia Zhang
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Na Li
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Jing Peng
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xiao-Ying Cai
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xue-Qin Jiang
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Kai-Yue Su
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Xin-Lu Zhang
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Qian-Ru Rao
- Department of Urology, Institute of Urology (Laboratory of Reconstructive Urology), West China Hospital, Sichuan University, Chengdu 610041, China
| | - Kong-Jun Liu
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - De-Xin Deng
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Ai-Hua Peng
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Ming-Hai Tang
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Li-Juan Chen
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
- Chengdu Zenitar Biomedical Technology Co., Ltd., Chengdu 610041, China
| | - Wen-Shuang Wu
- Division of Thyroid Surgery, Department of General Surgery and Laboratory of Thyroid and Parathyroid Disease, Frontiers Science Center for Disease-Related Molecular Network, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Hao-Yu Ye
- Department of Biotherapy, Cancer Center and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| |
Collapse
|
3
|
Rathore S, Raj Y, Debnath P, Kumar M, Kumar R. Ethnopharmacology, phytochemistry, agrotechnology, and conservation of Inula racemosa Hook f. - A critically endangered medicinal plant of the western Himalaya. JOURNAL OF ETHNOPHARMACOLOGY 2022; 283:114613. [PMID: 34600078 DOI: 10.1016/j.jep.2021.114613] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 08/26/2021] [Accepted: 09/05/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Inula racemosa Hook. f., is a critically endangered perennial herb distributed throughout the Himalaya; commercially useful in pharmaceutical products mainly because of its expectorant, antispasmodic, hypotensive, anti-inflammatory, carminative, thermogenic, digestive, cardiotonic, acrid, alexipharmic, anodyne, aphrodisiac, febrifuge, and antiseptic properties. The roots including rhizomes of the plant were used in the treatment of various ailments like chest pain, liver dysfunction, dyspnoea, and cardiovascular diseases by the ethenic Himalayan residents. AIM OF THE REVIEW Even though there are plentiful studies involving I. racemosa for pharmacological properties, but there is gap or few records available on production technologies and patents. The purpose of review is to provide large unmanageable information in systematic form for researchers, health care contributors, and policy makers so that they efficiently integrate the existing information and provide balanced decision making. MATERIALS AND METHODS Relevant data search was completed through systematic searches using various scientific databases including e-resources viz., Scopus, Google Scholar, Science Direct, ACS, Springer Link, Taylor and Francis, Scifinder, PubMed, PubChem, Web of Science, LibGen, Wiley, and China National Knowledge Infrastructure (CNKI). The list of literature cited in this review are dated from 1959 to 2021. RESULTS Till date variety of ethnobotanical and pharmacological properties of essential oil including crude extract of I. racemosa have been documented. The shortlisted records revealed that the herb has a potential to treat stomach ulcer, respiratory tract infections including chronic obstructive pulmonary disease (COPD). Alantolactone and isoalloalantolactone were reported as the major bioactive constituents along with few fatty acids, phytosterols, and glycosides characterized by GC, GC/MS, HPLC, HPTLC and qNMR techniques. CONCLUSIONS Based on a detailed literature survey on the plant, evidences were found fascinating for biological, traditional, and pharmacological effects, whilst there are no genomic resources available for this medicinal herb. Thus, molecular studies are critical for unravelling the production process of bioactive metabolites inside herb, which will underlay a path for improving these metabolites at commercial scale. Moreover, the association and role of particular phytoconstituent in its biological properties still needs to be validated. In addition, there are no reports on measures on its conservation and mechanism of toxicity research, which also needs more attention. We hope this review can provide a basis for further studies concerning the protected and efficient utilization of I. racemosa.
Collapse
Affiliation(s)
- Shalika Rathore
- Agrotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh, 176 061, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India.
| | - Yog Raj
- Agrotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh, 176 061, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India.
| | - Pritam Debnath
- Agrotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh, 176 061, India.
| | - Manish Kumar
- Agrotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh, 176 061, India.
| | - Rakesh Kumar
- Agrotechnology Division, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh, 176 061, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India.
| |
Collapse
|
4
|
Yu B, Jin XQ, Yu WY, Dong YY, Ying HZ, Yu CH. 1β-Hydroxyalantolactone from Inulae Flos alleviated the progression of pulmonary fibrosis via inhibiting JNK/FOXO1/NF-κB pathway. Int Immunopharmacol 2021; 101:108339. [PMID: 34758440 DOI: 10.1016/j.intimp.2021.108339] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 10/29/2021] [Accepted: 10/31/2021] [Indexed: 12/16/2022]
Abstract
Inulae Flos was widely distributed throughout Europe, Africa, and Asia, and was commonly used as a folk medicine in clinic for treating various respiratory diseases, including cough, asthma, bronchitis, pulmonary fibrosis, and pneumonia. However, the ingredients responsible for the pharmacology effects of I. Flos and the underlying mechanisms remain unclear. In this study, the effects of 16 known sesquiterpene lactones and flavonoids from I. Flos on TGF-β1-induced fibroblast activation were assessed by phenotypic high-content screening. Among those sixteen compounds, 1β-hydroxy alantolactone (HAL), the main characteristic sesquiterpene lactone from I. Flos, exhibited remarkable inhibitory activity. The further studies showed that HAL significantly inhibited the proliferation and induced the apoptosis of human fibroblast cell lines HELF and MRC-5 in a concentration-dependent manner. It also reduced intracellular ROS production, suppressed the mRNA expressions of E-cad, TGF-β1, Smad3, Col I, α-SMA and TNF-α, and downregulated protein expressions of α-SMA and F-actin. Furthermore, HAL significantly reduced the levels of HA, LN, PC-III and IV-C in serum, TNF-α and IL-6 in BALF, and TGF-β1, HYP and Col I in lung tissues of bleomycin (BLM)-treated rats. HAL significantly downregulated the expressions of p-JNK, FOXO1, p-p65, α-SMA, p-smad3 and Col I but upregulated p-FOXO1, which could be reversed by JNK agonist anisomycin. These results demonstrated that HAL induced the apoptosis of lung fibroblast cells activated by TGF-β1 and improved BLM-induced lung fibrosis in rats via inhibiting JNK/FOXO1/NF-κB pathway.
Collapse
Affiliation(s)
- Bing Yu
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Xiao-Qing Jin
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Wen-Ying Yu
- Key Laboratory of Experimental Animal and Safety Evaluation, Hangzhou Medical College, Hangzhou 310013, China
| | - Ying-Ying Dong
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Hua-Zhong Ying
- College of Pharmaceutical Science, Zhejiang Chinese Medical University, Hangzhou 310053, China; Key Laboratory of Experimental Animal and Safety Evaluation, Hangzhou Medical College, Hangzhou 310013, China
| | - Chen-Huan Yu
- Key Laboratory of Experimental Animal and Safety Evaluation, Hangzhou Medical College, Hangzhou 310013, China; Institute of Cancer and Basic Medicine, Chinese Academy of Sciences, Hangzhou 310018, China; Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Hangzhou 310022, China.
| |
Collapse
|
5
|
Zhang J, Xu Q, Yang HY, Yang M, Fang J, Gao K. Inhibition of Thioredoxin Reductase by Santamarine Conferring Anticancer Effect in HeLa Cells. Front Mol Biosci 2021; 8:710676. [PMID: 34485384 PMCID: PMC8416462 DOI: 10.3389/fmolb.2021.710676] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 08/06/2021] [Indexed: 01/03/2023] Open
Abstract
Natural products frequently have unique physiological activities and new action mechanisms due to their structural diversity and novelty, and are an important source for innovative drugs and lead compounds. We present herein that natural product santamarine targeted thioredoxin reductase (TrxR) to weaken its antioxidative function in cells, accompanied by accumulation of high levels of reactive oxygen species (ROS), and finally induced a new mechanism of tumor cell oxidative stress-mediated apoptosis. TrxR knockdown or overexpression cell lines were employed to further evaluate the cytotoxicity of santamarine regulated by TrxR, demonstrated that TrxR played a key role in the physiological effect of santamarine on cells. Santamarine targeting TrxR reveals its previously unrecognized mechanism of antitumor and provides a basis for the further development of santamarine as a potential cancer therapeutic agent.
Collapse
Affiliation(s)
- Junmin Zhang
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, China
| | - Qianhe Xu
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, China
| | - Hong-Ying Yang
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, China
| | - Minghao Yang
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, China
| | - Jianguo Fang
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, China
| | - Kun Gao
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, China
| |
Collapse
|
6
|
Zheng X, Wu Z, Xu J, Zhang X, Tu Y, Lei J, Yuan R, Cheng H, Wang Q, Yu J. Bioactive sesquiterpenes from Inula helenium. Bioorg Chem 2021; 114:105066. [PMID: 34134031 DOI: 10.1016/j.bioorg.2021.105066] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 06/01/2021] [Accepted: 06/03/2021] [Indexed: 01/05/2023]
Abstract
Twenty-one eudesmane-type sesquiterpenes, including five new compounds, were isolated from the roots of Inula helenium. The structures of the new compounds (1-5) were determined by extensive spectroscopic data interpretation, single-crystal X-ray diffraction analysis and ECD calculations. Six compounds can synergistically enhance cisplatin effect against ovarian cancer cells, the structure - activity relationship for the synergistic effect of these compounds with cisplatin was revealed for the first time, which provides useful clues to develop novel sensitizers to overcome drug resistance in cancer. In addition, fifteen sesquiterpenes exhibited significant anti-inflammatory activity, which provided promising candidates for development of anti-inflammatory agent.
Collapse
Affiliation(s)
- Xiaoqin Zheng
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China
| | - Zi Wu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China
| | - Jie Xu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China
| | - Xinxin Zhang
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China
| | - Yijun Tu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China
| | - Jiachuan Lei
- Renmin Hospital, Wuhan University, Wuhan 430060, China
| | - Ruiying Yuan
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China; Medical College, Tibet University, China
| | - Haitao Cheng
- College of Pharmacy, South Central University for Nationalities, 708 Minyuan Road, Wuhan 430074, China
| | - Qiang Wang
- College of Pharmacy, South Central University for Nationalities, 708 Minyuan Road, Wuhan 430074, China
| | - Jianqing Yu
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Wuhan University School of Pharmaceutical Sciences, Wuhan 430071, China.
| |
Collapse
|
7
|
Sun CP, Jia ZL, Huo XK, Tian XG, Feng L, Wang C, Zhang BJ, Zhao WY, Ma XC. Medicinal Inula Species: Phytochemistry, Biosynthesis, and Bioactivities. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2021; 49:315-358. [PMID: 33622212 DOI: 10.1142/s0192415x21500166] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
As a genus of the Asteraceae, Inula is widely distributed all over the world, and several of them are being used in traditional medicines. A number of metabolites were isolated from Inula species, and some of these have shown to possess ranges of pharmacological activities. The genus Inula contains abundant sesquiterpenoids, such as eudesmanes, xanthanes, and sesquiterpenoid dimers and trimers. In addition, other types of terpenoids, flavonoids, and lignins also exist in the genus Inula. Since 2010, more than 300 new secondary metabolites, including several known natural products that were isolated for the first time from the genus Inula. Most of them exhibited potential bioactivities in various diseases. The review aimed to summarize the advance of recent researches (2010-2020) on phytochemical constituents, biosynthesis, and pharmacological properties of the genus Inula for providing a scientific basis and supporting its application and exploitation for new drug development.
Collapse
Affiliation(s)
- Cheng-Peng Sun
- Dalian Key Laboratory of Metabolic Target, Characterization and Traditional Chinese, Medicine Intervention, College of Pharmacy, Institute of Integrative Medicine, Dalian, Medical University, Dalian, P. R. China.,Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, P. R. China
| | - Zi-Li Jia
- School of Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, P. R. China
| | - Xiao-Kui Huo
- Dalian Key Laboratory of Metabolic Target, Characterization and Traditional Chinese, Medicine Intervention, College of Pharmacy, Institute of Integrative Medicine, Dalian, Medical University, Dalian, P. R. China
| | - Xiang-Ge Tian
- Dalian Key Laboratory of Metabolic Target, Characterization and Traditional Chinese, Medicine Intervention, College of Pharmacy, Institute of Integrative Medicine, Dalian, Medical University, Dalian, P. R. China
| | - Lei Feng
- Dalian Key Laboratory of Metabolic Target, Characterization and Traditional Chinese, Medicine Intervention, College of Pharmacy, Institute of Integrative Medicine, Dalian, Medical University, Dalian, P. R. China
| | - Chao Wang
- Dalian Key Laboratory of Metabolic Target, Characterization and Traditional Chinese, Medicine Intervention, College of Pharmacy, Institute of Integrative Medicine, Dalian, Medical University, Dalian, P. R. China
| | - Bao-Jing Zhang
- Dalian Key Laboratory of Metabolic Target, Characterization and Traditional Chinese, Medicine Intervention, College of Pharmacy, Institute of Integrative Medicine, Dalian, Medical University, Dalian, P. R. China
| | - Wen-Yu Zhao
- Dalian Key Laboratory of Metabolic Target, Characterization and Traditional Chinese, Medicine Intervention, College of Pharmacy, Institute of Integrative Medicine, Dalian, Medical University, Dalian, P. R. China
| | - Xiao-Chi Ma
- Dalian Key Laboratory of Metabolic Target, Characterization and Traditional Chinese, Medicine Intervention, College of Pharmacy, Institute of Integrative Medicine, Dalian, Medical University, Dalian, P. R. China.,Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, P. R. China
| |
Collapse
|
8
|
Mandal SK, Debnath U, Kumar A, Thomas S, Mandal SC, Choudhury MD, Palit P. Natural Sesquiterpene Lactones in the Prevention and Treatment of Inflammatory Disorders and cancer: A Systematic Study of this Emerging Therapeutic Approach based on Chemical and Pharmacological Aspect. LETT DRUG DES DISCOV 2020. [DOI: 10.2174/1570180817999200421144007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Background and Introduction:
Sesquiterpene lactones are a class of secondary metabolite
that contains sesquiterpenoids and lactone ring as pharmacophore moiety. A large group of bioactive
secondary metabolites such as phytopharmaceuticals belong to this category. From the Asteraceae
family-based medicinal plants, more than 5,000 sesquiterpene lactones have been reported so
far. Sesquiterpene lactone-based pharmacophore moieties hold promise for broad-spectrum biological
activities against cancer, inflammation, parasitic, bacterial, fungal, viral infection and other functional
disorders. Moreover, these moiety based phytocompounds have been highlighted with a new
dimension in the natural drug discovery program worldwide after the 2015 Medicine Nobel Prize
achieved by the Artemisinin researchers.
Objective:
These bitter substances often contain an α, β-unsaturated-γ-lactone as a major structural
backbone, which in recent studies has been explored to be associated with anti-tumor, cytotoxic, and
anti-inflammatory action. Recently, the use of sesquiterpene lactones as phytomedicine has been
increased. This study will review the prospect of sesquiterpene lactones against inflammation and
cancer.
Methods:
Hence, we emphasized on the different features of this moiety by incorporating its structural
diversity on biological activities to explore structure-activity relationships (SAR) against inflammation
and cancer.
Results:
How the dual mode of action such as anti-inflammatory and anti-cancer has been exhibitedby
these phytopharmaceuticals will be forecasted in this study. Furthermore, the correlation of
anti-inflammatory and anti-cancer activity executed by the sesquiterpene lactones for fruitful phytotherapy
will also be revealed in the present review in the milieu of pharmacophore activity relation
and pharmacodynamics study as well.
Conclusion:
So, these metabolites are paramount in phytopharmacological aspects. The present discussion
on the future prospect of this moiety based on the reported literature could be a guide for
anti-inflammatory and anti-cancer drug discovery programs for the upcoming researchers.
Collapse
Affiliation(s)
- Sudip Kumar Mandal
- Department of Pharmaceutical Chemistry, Dr. B.C. Roy College of Pharmacy & Allied Health Sciences, Durgapur- 713206, India
| | - Utsab Debnath
- School of Pharmaceutical Technology, Adamas University, Kolkata 700126, India
| | - Amresh Kumar
- Department of Life Science and Bioinformatics, Biotech Hub, Assam University, Silchar, Assam-788011, India
| | - Sabu Thomas
- Mahatma Gandhi University, Kottayam-686560, Kerala, India
| | - Subhash Chandra Mandal
- Department of Pharmaceutical Technology, Pharmacognosy and Phytotherapy Research Laboratory, Jadavpur University, Kolkata 700032, India
| | - Manabendra Dutta Choudhury
- Department of Life Science and Bioinformatics, Biotech Hub, Assam University, Silchar, Assam-788011, India
| | - Partha Palit
- Department of Pharmaceutical Sciences, Drug Discovery Research Laboratory, Division of Pharmacognosy, Assam University (A Central University), Silchar-788011, India
| |
Collapse
|
9
|
Chi X, Zhang G, Chen S. Subcritical Water Extraction of Sesquiterpene Lactones from
Inula racemose. ChemistrySelect 2020. [DOI: 10.1002/slct.201903163] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Xiaofeng Chi
- Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining 810001 China
- Qinghai Provincial Key Laboratory of Crop Molecular Breeding Xining 810001 China
| | - Guoying Zhang
- Qinghai Provincial Drug Inspection and Testing Institute Xining 810001 China
| | - Shilong Chen
- Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining 810001 China
- Qinghai Provincial Key Laboratory of Crop Molecular Breeding Xining 810001 China
| |
Collapse
|
10
|
Mohan S, Gupta D. Role of Nrf2-antioxidant in radioprotection by root extract of Inula racemosa. Int J Radiat Biol 2019; 95:1122-1134. [DOI: 10.1080/09553002.2019.1607607] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Shikha Mohan
- Division of Capacity Enhancement and Product Induction, Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, Delhi, India
| | - Damodar Gupta
- Division of Capacity Enhancement and Product Induction, Institute of Nuclear Medicine and Allied Sciences, Defence Research and Development Organization, Delhi, India
| |
Collapse
|
11
|
Kumar C, Kumar A, Nalli Y, Lone WI, Satti NK, Verma MK, Ahmed Z, Ali A. Design, synthesis and biological evaluation of alantolactone derivatives as potential anti-inflammatory agents. Med Chem Res 2019. [DOI: 10.1007/s00044-019-02337-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
12
|
Ding Y, Pan W, Xu J, Wang T, Chen T, Liu Z, Xie C, Zhang Q. Sesquiterpenoids from the roots of Inula helenium inhibit acute myelogenous leukemia progenitor cells. Bioorg Chem 2019; 86:363-367. [PMID: 30753990 DOI: 10.1016/j.bioorg.2019.01.055] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 01/14/2019] [Accepted: 01/25/2019] [Indexed: 12/29/2022]
Abstract
One new eudesmane sesquiterpenoid, 11β-hydroxy-13-chloro-eudesm-5-en-12, 8-olide (1), was isolated from the roots of Inula helenium together with nine eudesmanolides (2-10) and one germacranolide (11). Their structures were elucidated on the basis of detailed spectroscopic analyses. All isolates were evaluated for their antiproliferative activities against human leukemia stem-like cell line KG1a. Compound 10 exhibited the most potent effect with the IC50 value of 3.36 ± 0.18 μM. A further investigation revealed that compound 10 could significantly induce apoptosis of KG1a cells. Additionally, compound 10 had an obvious effect on the levels of apoptosis-related proteins (Bcl-2, Bax, cytochrome c, caspase 9 and caspase 3), indicating that the antiproliferative effect of compound 10 on KG1a cells might be mediated through a mitochondria-dependent apoptotic pathway.
Collapse
MESH Headings
- Antineoplastic Agents, Phytogenic/chemistry
- Antineoplastic Agents, Phytogenic/isolation & purification
- Antineoplastic Agents, Phytogenic/pharmacology
- Apoptosis/drug effects
- Cell Proliferation/drug effects
- Dose-Response Relationship, Drug
- Drug Screening Assays, Antitumor
- Humans
- Inula/chemistry
- Leukemia, Myeloid, Acute/drug therapy
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/pathology
- Mitochondria/drug effects
- Mitochondria/metabolism
- Molecular Structure
- Plant Extracts/chemistry
- Plant Extracts/isolation & purification
- Plant Extracts/pharmacology
- Plant Roots/chemistry
- Sesquiterpenes/chemistry
- Sesquiterpenes/isolation & purification
- Sesquiterpenes/pharmacology
- Structure-Activity Relationship
- Tumor Cells, Cultured
Collapse
Affiliation(s)
- Yahui Ding
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People's Republic of China
| | - Wenwei Pan
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People's Republic of China
| | - Junqing Xu
- Department of Hematology, Yantai Yuhuangding Hospital, Qingdao University Medical College, Yantai 264000, People's Republic of China
| | - Tianpeng Wang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People's Republic of China
| | - Tianyang Chen
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People's Republic of China
| | - Zhongquan Liu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People's Republic of China
| | - Chunfeng Xie
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People's Republic of China.
| | - Quan Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300071, People's Republic of China.
| |
Collapse
|
13
|
Arha D, Ramakrishna E, Gupta AP, Rai AK, Sharma A, Ahmad I, Riyazuddin M, Gayen JR, Maurya R, Tamrakar AK. Isoalantolactone derivative promotes glucose utilization in skeletal muscle cells and increases energy expenditure in db/db mice via activating AMPK-dependent signaling. Mol Cell Endocrinol 2018; 460:134-151. [PMID: 28736255 DOI: 10.1016/j.mce.2017.07.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 06/16/2017] [Accepted: 07/19/2017] [Indexed: 01/07/2023]
Abstract
Augmenting glucose utilization and energy expenditure in skeletal muscle via AMP-activated protein kinase (AMPK) is an imperative mechanism for the management of type 2 diabetes. Chemical derivatives (2a-2h, 3, 4a-4d, 5) of the isoalantolactone (K007), a bioactive molecule from roots of Inula racemosa were synthesized to optimize the bioactivity profile to stimulate glucose utilization in skeletal muscle cells. Interestingly, 4a augmented glucose uptake, driven by enhanced translocation of glucose transporter 4 (GLUT4) to cell periphery in L6 rat skeletal muscle cells. The effect of 4a was independent to phosphatidylinositide-3-kinase (PI-3-K)/Akt pathway, but mediated through Liver kinase B1 (LKB1)/AMPK-dependent signaling, leading to activation of downstream targets acetyl coenzyme A carboxylase (ACC) and sterol regulatory element binding protein 1c (SREBP-1c). In db/db mice, 4a administration decreased blood glucose level and improved body mass index, lipid parameters and glucose tolerance associated with elevation of GLUT4 expression in skeletal muscle. Moreover, 4a increased energy expenditure via activating substrate utilization and upregulated the expression of thermogenic transcription factors and mitochondrial proteins in skeletal muscle, suggesting the regulation of energy balance. These findings suggest the potential implication of isoalantolactone derivatives for the management of diabetes.
Collapse
Affiliation(s)
- Deepti Arha
- Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; Academy of Scientific and Innovative Research, New Delhi 110001, India
| | - E Ramakrishna
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Anand P Gupta
- Pharmacokinetics and Metabolism Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Amit K Rai
- Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Aditya Sharma
- Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Ishbal Ahmad
- Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Mohammed Riyazuddin
- Pharmacokinetics and Metabolism Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Jiaur R Gayen
- Pharmacokinetics and Metabolism Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Rakesh Maurya
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India
| | - Akhilesh K Tamrakar
- Biochemistry Division, CSIR-Central Drug Research Institute, Lucknow 226031, India; Academy of Scientific and Innovative Research, New Delhi 110001, India.
| |
Collapse
|
14
|
Kaur M, Kumar R, Upendrabhai DP, Singh IP, Kaur S. Impact of sesquiterpenes from Inula racemosa (Asteraceae) on growth, development and nutrition of Spodoptera litura (Lepidoptera: Noctuidae). PEST MANAGEMENT SCIENCE 2017; 73:1031-1038. [PMID: 27607232 DOI: 10.1002/ps.4429] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Revised: 08/23/2016] [Accepted: 08/31/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND The use of botanical pesticides for protecting crops from insect pests has assumed greater importance all over the world owing to growing awareness of harmful effects of indiscriminate use of synthetic pesticides. Inula racemosa Hook. f. (Asteraceae), a medicinally important perennial herb, is rich in sesquiterpenes with many biological activities. The present studies were conducted with the objective to evaluate the sesquiterpenes isolated from I. racemosa for insecticidal activity against Spodoptera litura (F.). RESULTS Alantolactone and isoalantolactone isolated from I. racemosa exerted growth inhibitory effects on S. litura. Addition of both the sesquiterpenes to larval diet extended the development period and reduced pupation as well as adult emergence. The dietary utilisation experiments on third-instar larvae of S. litura revealed reduction in consumption and growth rates of larvae as well as efficiency of conversion of ingested and digested food owing to alantolactone and isoalantolactone. CONCLUSION The root extract of I. racemosa, which is rich in two sesquiterpenes, i.e. alantolactone and isoalantolactone, has the potential for management of S. litura. However, there is a need to understand the specific mechanism of action of these compounds. © 2016 Society of Chemical Industry.
Collapse
Affiliation(s)
- Mandeep Kaur
- Department of Zoology, Guru Nanak Dev University, Amritsar, Punjab, India
| | - Rakesh Kumar
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), S.A.S. Nagar, Punjab, India
| | - Deep Patel Upendrabhai
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), S.A.S. Nagar, Punjab, India
| | - Inder Pal Singh
- Department of Natural Products, National Institute of Pharmaceutical Education and Research (NIPER), S.A.S. Nagar, Punjab, India
| | - Sanehdeep Kaur
- Department of Zoology, Guru Nanak Dev University, Amritsar, Punjab, India
| |
Collapse
|
15
|
Jin Q, Lee JW, Jang H, Choi JE, Lee D, Hong JT, Kim Y, Lee MK, Hwang BY. Sesquiterpenes from Inula japonica with Inhibitory Effects on Nitric Oxide Production in Murine Macrophage RAW 264.7 Cells. JOURNAL OF NATURAL PRODUCTS 2016; 79:1548-1553. [PMID: 27276091 DOI: 10.1021/acs.jnatprod.5b01106] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Eight new sesquiterpenes (1-8), along with seven known sesquiterpenes (9-15), were isolated from a methanol extract of the flowers of Inula japonica. Their structures were elucidated by a combination of 1D and 2D NMR spectroscopic and HRESIMS data. All of isolates were evaluated for their inhibitory effects on nitric oxide production in LPS-induced RAW 264.7 cells, with their IC50 values ranging from 1.9 to 15.4 μM.
Collapse
Affiliation(s)
- Qinghao Jin
- College of Pharmacy, Chungbuk National University , Cheongju 28644, Korea
| | - Jin Woo Lee
- College of Pharmacy, Chungbuk National University , Cheongju 28644, Korea
| | - Hari Jang
- College of Pharmacy, Chungbuk National University , Cheongju 28644, Korea
| | - Ji Eun Choi
- College of Pharmacy, Chungbuk National University , Cheongju 28644, Korea
| | - Dongho Lee
- Department of Biosystems and Biotechnology, College of Life Sciences and Biotechnology, Korea University , Seoul 02841, Korea
| | - Jin Tae Hong
- College of Pharmacy, Chungbuk National University , Cheongju 28644, Korea
| | - Youngsoo Kim
- College of Pharmacy, Chungbuk National University , Cheongju 28644, Korea
| | - Mi Kyeong Lee
- College of Pharmacy, Chungbuk National University , Cheongju 28644, Korea
| | - Bang Yeon Hwang
- College of Pharmacy, Chungbuk National University , Cheongju 28644, Korea
| |
Collapse
|
16
|
Wang X, Zhang JZ, Zhou JC, Shen T, Lou HX. Terpenoids from Diplophyllum taxifolium with quinone reductase-inducing activity. Fitoterapia 2016; 109:1-7. [DOI: 10.1016/j.fitote.2015.11.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 11/26/2015] [Accepted: 11/28/2015] [Indexed: 01/30/2023]
|
17
|
Zhang J, Li Y, Duan D, Yao J, Gao K, Fang J. Inhibition of thioredoxin reductase by alantolactone prompts oxidative stress-mediated apoptosis of HeLa cells. Biochem Pharmacol 2016; 102:34-44. [PMID: 26686580 DOI: 10.1016/j.bcp.2015.12.004] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 12/08/2015] [Indexed: 01/17/2023]
Abstract
The mammalian thioredoxin reductase (TrxR) isoenzymes, TrxR1 in cytosol or nucleus, TrxR2 in mitochondria, and TrxR3 in testis, are essential seleno-flavoenzymes with a conserved penultimate selenocysteine (Sec) residue at the C-terminus, and have attracted increasing interests as potential targets for development of cancer chemotherapeutic agents. The sesquiterpene lactone alantolactone (ATL), an active component from the traditional folk medicine Inula helenium, has been documented possessing multiple pharmacological functions, especially the anticancer activity. However, the underlying mechanism has not been well defined. We reported that ATL inhibits both the recombinant TrxR and the enzyme in the cellular environment. The alpha-methylene-gamma-lactone moiety in ATL and the Sec residue in TrxR are critical for targeting TrxR by ATL. By employing our newly developed pull down assay, we demonstrated the remarkable elevation of the oxidized thioredoxin in HeLa cells after ATL treatment. In addition, ATL elicits accumulation of reactive oxygen species, and eventually induces apoptosis of HeLa cells. Importantly, overexpression of the functional TrxR attenuates the cytotoxicity of ATL, while knockdown of the enzyme sensitizes the cells to ATL treatment. Targeting TrxR thus discloses a novel molecular mechanism underlying the cellular action of ATL, and sheds light in considering the usage of ATL as a potential cancer chemotherapeutic agent.
Collapse
Affiliation(s)
- Junmin Zhang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Ya Li
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Dongzhu Duan
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Juan Yao
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Kun Gao
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
| | - Jianguo Fang
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
| |
Collapse
|
18
|
Wang X, Zhang X, Zheng B, Hu N, Xie W, Row K. Synthesis of 13-amino telekin derivatives and their cytotoxic activity. Nat Prod Res 2014; 29:756-63. [DOI: 10.1080/14786419.2014.987143] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Xiujie Wang
- Department of Pharmacy, College of Marine Science, Shandong University, Weihai 264209, P.R. China
| | - Xiumei Zhang
- Department of Pharmacy, College of Marine Science, Shandong University, Weihai 264209, P.R. China
| | - Beibei Zheng
- Department of Pharmacy, College of Marine Science, Shandong University, Weihai 264209, P.R. China
| | - Nan Hu
- Department of Pharmacy, College of Marine Science, Shandong University, Weihai 264209, P.R. China
| | - Weidong Xie
- Department of Pharmacy, College of Marine Science, Shandong University, Weihai 264209, P.R. China
- Department of Chemical Engineering, Inha University, Incheon 402-751, South Korea
| | - Kyungho Row
- Department of Chemical Engineering, Inha University, Incheon 402-751, South Korea
| |
Collapse
|
19
|
Sridharan V, Fan L, Takizawa S, Suzuki T, Sasai H. Pd(II)-SDP-catalyzed enantioselective 5-exo-dig cyclization of γ-alkynoic acids: application to the synthesis of functionalized dihydofuran-2(3H)-ones containing a chiral quaternary carbon center. Org Biomol Chem 2014; 11:5936-43. [PMID: 23903490 DOI: 10.1039/c3ob41103f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Pd(II)-SDP-catalyzed first enantioselective intramolecular cyclization of α,α-disubstituted γ-alkynoic acids is described. This 5-exo-dig cyclization afforded dihydrofuran-2(3H)-ones bearing a chiral quaternary carbon center in excellent yields with enantioselectivities up to 71%. A mechanism involving palladium(II) species is proposed to rationalize the outcome of the reaction.
Collapse
Affiliation(s)
- Vellaisamy Sridharan
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan.
| | | | | | | | | |
Collapse
|
20
|
Wang GW, Qin JJ, Cheng XR, Shen YH, Shan L, Jin HZ, Zhang WD. Inula sesquiterpenoids: structural diversity, cytotoxicity and anti-tumor activity. Expert Opin Investig Drugs 2014; 23:317-45. [PMID: 24387187 DOI: 10.1517/13543784.2014.868882] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION The plants of the genus Inula (Asteraceae) are widely distributed throughout Europe, Africa and Asia, and many of these plants have long been used in folk medicine. This genus is a rich source of sesquiterpenoids, which exhibit a wide range of biological activities. Recently, a series of bioactive sesquiterpenoid dimers, with unusual carbon skeletons, have been reported and these have gathered considerable interest. AREAS COVERED This article systematically reviews sesquiterpenoids isolated from the genus Inula that have appeared in literature up to August 2013, critically highlighting their anti-tumoral activities and relevant mechanistic insights. The authors also discuss the initial structure-activity relationships for the cytotoxic and anti-tumoral activities of the Inula sesquiterpenoids. Finally, the authors discuss the challenges and potential applications of these sesquiterpenoids in the future. EXPERT OPINION Cytotoxic and anti-tumor activities of Inula sesquiterpenoids have been extensively studied since the 1970s. One promising compound, Japonicone A, a dimeric sesquiterpene lactone from traditional herb Inula japonica, has displayed potent in vitro and in vivo anti-tumor activity against Burkitt's lymphoma. Additionally, acetylbritannilactone is thought to be capable of suppressing the abnormal vascular smooth muscle cell proliferation, with the induction of apoptosis in vivo and in vitro. In this regard, it may be worthwhile further investigating acetylbritannilactone in patients with vascular restenosis. Furthermore, given the anti-inflammatory property of britanin, clinical studies on chronic bronchitis and asthma, using the ethanol extract of I. japonica, are currently underway in South Korea. However, despite demonstrating good therapeutic effects, additional pharmacological and toxicological studies are still needed.
Collapse
Affiliation(s)
- Guo-Wei Wang
- Shanghai Jiao Tong University, School of Pharmacy , Shanghai , China +86 21 81871244 ; +86 21 81871244 ;
| | | | | | | | | | | | | |
Collapse
|
21
|
Mosquito Larvicidal Constituents from the Ethanol Extract ofInula racemosaHook. f. Roots againstAedes albopictus. J CHEM-NY 2014. [DOI: 10.1155/2014/738796] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The aim of this research was to determine larvicidal activity of the ethanol extract ofInula racemosaHook. f. (Compositae) roots against the larvae of the Culicidae mosquitoAedes albopictusand to isolate any larvicidal constituents from the extract. Based on bioactivity-guided fractionation, 11,13-dihydroisoalantolactone (1), macrophyllilactone E (2), 5α-epoxyalantolactone (3), and epoxyisoalantolactone (4) were isolated and identified as the active constituents. Compounds1and2exhibited strong larvicidal activity against the early fourth-instar larvae ofA. albopictuswith LC50values of 21.86 μg/mL and 18.65 μg/mL, respectively, while the ethanol extract had a LC50value of 25.23 μg/mL. Compounds3and4also possessed larvicidal activity against the Asian tiger mosquitoes with LC50values of 29.37 μg/mL and 35.13 μg/mL, respectively. The results indicated that the ethanol extract ofI. racemosaand the four isolated constituents have potential for use in the control ofA. albopictuslarvae and could be useful in the search of newer, safer, and more effective natural compounds as larvicides.
Collapse
|