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Yan J, Lu A, Kun J, Wang B, Miao Y, Chen Y, Ho CT, Meng Q, Tong H. Characterization of triterpenoids as possible bitter-tasting compounds in teas infected with bird’s eye spot disease. Food Res Int 2023; 167:112643. [PMID: 37087235 DOI: 10.1016/j.foodres.2023.112643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/16/2023] [Accepted: 02/21/2023] [Indexed: 02/26/2023]
Abstract
Tea infected with bird's eye spot disease generally imparts a long-lasting bitter taste, which is unacceptable to most consumers. This study has comprehensively evaluated the taste profiles of infected and healthy teas and investigated their known bitter compounds previously reported in tea. Quantification analyses and calculation of dose-over-threshold (DoT) factors revealed that no obvious difference was visualized in catechins, caffeine, bitter amino acids, and flavonols and their glycosides between infected and healthy tea samples, which was also verified by principal component analysis (PCA) and hierarchical cluster analysis (HCA). Therefore, these known bitter compounds have been ruled out as critical contributors to the long-lasting bitterness of infected teas. Furthermore, Gel permeation chromatography, sensory analysis, and UPLC-Q-TOF-MS were employed and identified 13 substances from the target bitter fractions, including caffeine, ten triterpenoids, and two oxylipins. The higher triterpenoid levels were supposed to be the reason causing the long-lasting bitterness. This study has provided a research direction for the molecular basis of the long-lasting bitterness of infected tea leaves with bird's eye spot disease.
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Affiliation(s)
- Jingna Yan
- College of Food Science, Southwest University, Beibei, Chongqing 400715, China
| | - Anxia Lu
- Faculty of Agriculture, Forestry and Food Engineering, Yibin University, Yibin 644000, China
| | - Jirui Kun
- College of Food Science, Southwest University, Beibei, Chongqing 400715, China
| | - Bei Wang
- College of Food Science, Southwest University, Beibei, Chongqing 400715, China; Food Quality & Design Group, Wageningen University & Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands
| | - Yiwen Miao
- College of Food Science, Southwest University, Beibei, Chongqing 400715, China
| | - Yingjuan Chen
- College of Food Science, Southwest University, Beibei, Chongqing 400715, China
| | - Chi-Tang Ho
- Department of Food Science, Rutgers University, New Brunswick, NJ 08901, USA
| | - Qing Meng
- College of Food Science, Southwest University, Beibei, Chongqing 400715, China.
| | - Huarong Tong
- College of Food Science, Southwest University, Beibei, Chongqing 400715, China.
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Anti-Pulmonary Fibrosis Activities of Triterpenoids from Oenothera biennis. Molecules 2022; 27:molecules27154870. [PMID: 35956820 PMCID: PMC9369581 DOI: 10.3390/molecules27154870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 07/08/2022] [Accepted: 07/25/2022] [Indexed: 11/17/2022] Open
Abstract
Five new triterpenoids, oenotheralanosterols C-G (1–5), with seven known triterpenoidcompounds, namely 2α,3α,19α-trihydroxy-24-norurs4,12-dien-28-oic acid (6), 3β,23-dihydroxy-1-oxo-olean-12-en-28-oic acid (7), remangilone C (8), knoxivalic acid A (9), termichebulolide (10), rosasecotriterpene A (11), androsanortriterpene C (12), were extracted and separated from the dichloromethane part of Oenothera biennis L. The anti-pulmonary fibrosis activities of all the compounds against TGF-β1-induced damage tonormal human lung epithelial (BEAS-2B) cells were investigated in vitro. The results showed that compounds 1–2, 6, 8, and 11 exhibited significant anti-pulmonary fibrosis activities, with EC50 values ranging from 4.7 μM to 9.9 μM.
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Tri MD, Tram TTM, Ngoc LH, An TNM, Phat NT, Minh PN, Kieu NV, Van Son D, Nguyen TP, Mai TTN, Duong TH. Recurvataside, a new saponin from aerial parts of Mussaenda recurvata. Nat Prod Res 2022:1-8. [PMID: 35176920 DOI: 10.1080/14786419.2022.2039137] [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: 10/19/2022]
Abstract
A new glycoside, recurvataside (1) and six known compounds, quinovic acid (2), quinovic acid 28-O-β-D-glucopyranosyl ester (3), 3-O-β-D-glucopyranosylquinovic acid (4), 3-O-β-D-glucopyranosylquinovic acid 28-O-β-D-glucopyranosyl ester (5), pomolic acid (6), and ursolic acid (7) were isolated from aerial parts of Mussaenda recurvata. The structure of compound 1 was identified from its spectroscopic data and by comparison with the literature. Recurvataside represents the first occurrence of δ-oleanolic acid saponin bearing two D-glucose units at C-3 and C-28 in nature. This is the first time δ-oleanane-type saponin reported in the genus Mussaenda. Compounds 1-7 were evaluated the cytotoxicity against two cancer cell lines MCF-7 and HepG2. Among them, only compound 7 exhibited moderate activity against MCF-7 and HepG2 cell lines with IC50 value of 16.97 ± 1.55 and 20.28 ± 1.00 μM, respectively. Compounds 1-7 were also tested for their inhibitory NO production in LPS-stimulated RAW264.7 cells. Compounds 3, 5, and 7 showed significant reduction of nitrite accumulation in LPS-stimulated RAW 264.7 cells with the IC50 values of 8.81 ± 0.48, 13.42 ± 0.84, and 18.37 ± 0.67 μM, respectively.
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Affiliation(s)
- Mai Dinh Tri
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha noi, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Tran Thi Mai Tram
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
| | - Le Hoang Ngoc
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha noi, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Tran Nguyen Minh An
- Faculty of Chemical Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Nguyen Tan Phat
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha noi, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Phan Nhat Minh
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha noi, Vietnam.,Institute of Chemical Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Nguyen Van Kieu
- Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, Vietnam.,Faculty of Natural Sciences, Duy Tan University, Da Nang, Vietnam
| | - Dang Van Son
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ha noi, Vietnam.,Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Thi-Phuong Nguyen
- NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
| | - Tran Thi Ngoc Mai
- Institute of Applied Sciences, HUTECH University, Ho Chi Minh City, Vietnam
| | - Thuc-Huy Duong
- Department of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City, Vietnam
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