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Seo YH, Kim JY, Ryu SM, Hwang SY, Lee MH, Kim N, Son H, Lee AY, Kim HS, Moon BC, Jang DS, Lee J. New Sesquiterpene Glycosides from the Flowers of Aster koraiensis and Their Inhibition Activities on EGF- and TPA-Induced Cell Transformation. PLANTS (BASEL, SWITZERLAND) 2023; 12:1726. [PMID: 37111949 PMCID: PMC10146194 DOI: 10.3390/plants12081726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 04/07/2023] [Accepted: 04/18/2023] [Indexed: 06/19/2023]
Abstract
In total, four new eudesmane-type sesquiterpene glycosides, askoseosides A-D (1-4), and 18 known compounds (5-22) were isolated from the flowers of Aster koraiensis via chromatographic techniques. Chemical structures of the isolated compounds were identified by spectroscopic/spectrometric methods, including NMR and HRESIMS, and the absolute configuration of the new compounds (1 and 2) was performed by electronic circular dichroism (ECD) studies. Further, the anticancer activities of the isolated compounds (1-22) were evaluated using the epidermal growth factor (EGF)-induced as well as the 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced cell transformation assay. Among the 22 compounds, compounds 4, 9, 11, 13-15, 17, 18, and 22 significantly inhibited both EGF- and TPA-induced colony growth. In particular, askoseoside D (4, EGF: 57.8%; TPA: 67.1%), apigenin (9, EGF: 88.6%; TPA: 80.2%), apigenin-7-O-β-d-glucuronopyranoside (14, EGF: 79.2%; TPA: 70.7%), and 1-(3',4'-dihydroxycinnamoyl) cyclopentane-2,3-diol (22, EGF: 60.0%; TPA: 72.1%) showed higher potent activities.
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Affiliation(s)
- Young-Hye Seo
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine (KIOM), Naju 58245, Republic of Korea
| | - Ji-Young Kim
- Department of Biomedical and Pharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Seung-Mok Ryu
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine (KIOM), Naju 58245, Republic of Korea
| | - Sun-Young Hwang
- College of Korean Medicine, Dongshin University, Naju 58245, Republic of Korea
| | - Mee-Hyun Lee
- College of Korean Medicine, Dongshin University, Naju 58245, Republic of Korea
| | - Nahyun Kim
- Division of Forest Industrial Materials, Department of Forest Products and Industry, National Institute of Forest Science, Seoul 02455, Republic of Korea
| | - Hojun Son
- Forest Medicinal Resources Research Center, National Institute of Forest Science, Yeongju 36040, Republic of Korea
| | - A-Yeong Lee
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine (KIOM), Naju 58245, Republic of Korea
| | - Hyo-Seon Kim
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine (KIOM), Naju 58245, Republic of Korea
| | - Byeong-Cheol Moon
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine (KIOM), Naju 58245, Republic of Korea
| | - Dae-Sik Jang
- Department of Biomedical and Pharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Jun Lee
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine (KIOM), Naju 58245, Republic of Korea
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Lee SE, Park S, Jang GY, Lee J, Moon M, Ji YJ, Jung JW, Nam Y, Shin SJ, Lee Y, Choi J, Kim DH. Extract of Aster koraiensis Nakai Leaf Ameliorates Memory Dysfunction via Anti-inflammatory Action. Int J Mol Sci 2023; 24:ijms24065765. [PMID: 36982837 PMCID: PMC10052554 DOI: 10.3390/ijms24065765] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 03/12/2023] [Accepted: 03/14/2023] [Indexed: 03/22/2023] Open
Abstract
Aster koraiensis Nakai (AK) leaf reportedly ameliorates health problems, such as diabetes. However, the effects of AK on cognitive dysfunction or memory impairment remain unclear. This study investigated whether AK leaf extract could attenuate cognitive impairment. We found that AK extract reduced the production of nitric oxide (NO), tumour necrosis factor (TNF)-α, phosphorylated-tau (p-tau), and the expression of inflammatory proteins in lipopolysaccharide- or amyloid-β-treated cells. AK extract exhibited inhibitory activity of control specific binding on N-methyl-D-aspartate (NMDA) receptors. Scopolamine-induced AD models were used chronically in rats and acutely in mice. Relative to negative controls (NC), hippocampal choline acetyltransferase (ChAT) and B-cell lymphoma 2 (Bcl2) activity was increased in rats chronically treated with scopolamine and fed an AK extract-containing diet. In the Y-maze test, spontaneous alterations were increased in the AK extract-fed groups compared to NC. Rats administered AK extract showed increased escape latency in the passive avoidance test. In the hippocampus of rats fed a high-AK extract diet (AKH), the expression of neuroactive ligand–receptor interaction-related genes, including Npy2r, Htr2c, and Rxfp1, was significantly altered. In the Morris water maze assay of mice acutely treated with scopolamine, the swimming times in the target quadrant of AK extract-treated groups increased significantly to the levels of the Donepezil and normal groups. We used Tg6799 Aβ-overexpressing 5XFAD transgenic mice to investigate Aβ accumulation in animals. In the AD model using 5XFAD, the administration of AK extract decreased amyloid-β (Aβ) accumulation and increased the number of NeuN antibody-reactive cells in the subiculum relative to the control group. In conclusion, AK extract ameliorated memory dysfunction by modulating ChAT activity and Bcl2-related anti-apoptotic pathways, affecting the expression of neuroactive ligand–receptor interaction-related genes and inhibiting Aβ accumulation. Therefore, AK extract could be a functional material improving cognition and memory.
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Affiliation(s)
- Seung-Eun Lee
- Department of Herbal Crop Research, National Institute of Horticultural & Herbal Science (NIHHS), Eumseong 27709, Republic of Korea; (S.P.); (G.Y.J.); (J.L.); (Y.-J.J.); (Y.L.); (J.C.); (D.H.K.)
- Correspondence:
| | - Saetbyeol Park
- Department of Herbal Crop Research, National Institute of Horticultural & Herbal Science (NIHHS), Eumseong 27709, Republic of Korea; (S.P.); (G.Y.J.); (J.L.); (Y.-J.J.); (Y.L.); (J.C.); (D.H.K.)
| | - Gwi Yeong Jang
- Department of Herbal Crop Research, National Institute of Horticultural & Herbal Science (NIHHS), Eumseong 27709, Republic of Korea; (S.P.); (G.Y.J.); (J.L.); (Y.-J.J.); (Y.L.); (J.C.); (D.H.K.)
| | - Jeonghoon Lee
- Department of Herbal Crop Research, National Institute of Horticultural & Herbal Science (NIHHS), Eumseong 27709, Republic of Korea; (S.P.); (G.Y.J.); (J.L.); (Y.-J.J.); (Y.L.); (J.C.); (D.H.K.)
| | - Minho Moon
- Department of Biochemistry, College of Medicine, Konyang University, Gwanjeodong-ro 158, Soe-gu, Daejeon 35365, Republic of Korea; (M.M.); (Y.N.); (S.J.S.)
| | - Yun-Jeong Ji
- Department of Herbal Crop Research, National Institute of Horticultural & Herbal Science (NIHHS), Eumseong 27709, Republic of Korea; (S.P.); (G.Y.J.); (J.L.); (Y.-J.J.); (Y.L.); (J.C.); (D.H.K.)
| | - Ji Wook Jung
- Division of Biotechnology and Convergence, College of Cosmetics and Pharm, Daegu Haany University, Kyungsan 38610, Republic of Korea;
| | - Yunkwon Nam
- Department of Biochemistry, College of Medicine, Konyang University, Gwanjeodong-ro 158, Soe-gu, Daejeon 35365, Republic of Korea; (M.M.); (Y.N.); (S.J.S.)
| | - Soo Jung Shin
- Department of Biochemistry, College of Medicine, Konyang University, Gwanjeodong-ro 158, Soe-gu, Daejeon 35365, Republic of Korea; (M.M.); (Y.N.); (S.J.S.)
| | - Yunji Lee
- Department of Herbal Crop Research, National Institute of Horticultural & Herbal Science (NIHHS), Eumseong 27709, Republic of Korea; (S.P.); (G.Y.J.); (J.L.); (Y.-J.J.); (Y.L.); (J.C.); (D.H.K.)
| | - Jehun Choi
- Department of Herbal Crop Research, National Institute of Horticultural & Herbal Science (NIHHS), Eumseong 27709, Republic of Korea; (S.P.); (G.Y.J.); (J.L.); (Y.-J.J.); (Y.L.); (J.C.); (D.H.K.)
| | - Dong Hwi Kim
- Department of Herbal Crop Research, National Institute of Horticultural & Herbal Science (NIHHS), Eumseong 27709, Republic of Korea; (S.P.); (G.Y.J.); (J.L.); (Y.-J.J.); (Y.L.); (J.C.); (D.H.K.)
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Kim JY, Seo YH, Lee IH, Choi HY, Kwon HC, Choi JH, Lee J, Jang DS. New Eudesmane-Type Sesquiterpene Glycosides from the Leaves of Aster koraiensis. PLANTS 2020; 9:plants9121811. [PMID: 33371294 PMCID: PMC7766762 DOI: 10.3390/plants9121811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 12/16/2020] [Accepted: 12/18/2020] [Indexed: 11/28/2022]
Abstract
Four new eudesmane-type sesquiterpenoids, (1R,5S,6R,7S,9S,10S)-1,6,9-trihydroxy-eudesm-3-ene-1,6-di-O-β-d-glucopyranoside (1), (1R,5S,6S,7R,9S,10S)-1,6,9,11-tetrahydroxy-eudesm-3-ene-1,6-di-O-β-d-glucopyranoside (3), (1R,5S,6R,7S,9S,10R)-9-O-(Z-p-coumaroyl)-1,6,9-trihydroxy-eudesm-3-ene-6-O-β-d-glucopyranoside (6), and (1R,5S,6R,7S,9S,10R)-9-O-(E-feruloyl)-1,6,9-trihydroxy-eudesm-3-ene-6-O-β-d-glucopyranoside (7), were isolated from a 95% EtOH extract of the leaves of Aster koraiensis by repeated chromatography. Moreover, three sesquiterpenoids (2, 4, and 5) and two caffeoylquinic acids (8 and 9) having previously known chemical structures were isolated during the isolation procedure. The four new compounds (1, 3, 6, and 7) were elucidated by spectroscopic data (1D- and 2D-NMR, MS, and ECD) interpretation and hydrolysis. Moreover, the absolute configurations of 2, 4, and 5 were determined for the first time in this study. The compounds isolated were tested for their viability on nitric oxide (NO) and prostaglandin E2 (PGE2) production on LPS-stimulated RAW 264.7 cells. Among them, only 7 presented weak inhibitory effects on both NO and PGE2 production.
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Affiliation(s)
- Ji-Young Kim
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Korea; (J.-Y.K.); (I.-H.L.); (H.Y.C.); (J.-H.C.)
| | - Young Hye Seo
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine (KIOM), Naju 58245, Korea;
| | - Im-Ho Lee
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Korea; (J.-Y.K.); (I.-H.L.); (H.Y.C.); (J.-H.C.)
| | - He Yun Choi
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Korea; (J.-Y.K.); (I.-H.L.); (H.Y.C.); (J.-H.C.)
| | - Hak Cheol Kwon
- Natural Product Informatics Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute, Gangneung 25451, Korea;
| | - Jung-Hye Choi
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Korea; (J.-Y.K.); (I.-H.L.); (H.Y.C.); (J.-H.C.)
| | - Jun Lee
- Herbal Medicine Resources Research Center, Korea Institute of Oriental Medicine (KIOM), Naju 58245, Korea;
- Correspondence: (J.L.); (D.S.J.)
| | - Dae Sik Jang
- Department of Life and Nanopharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Korea; (J.-Y.K.); (I.-H.L.); (H.Y.C.); (J.-H.C.)
- Correspondence: (J.L.); (D.S.J.)
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Hong SC, Ha JH, Lee JK, Jung SH, Kim JC. In Vivo Anti-Inflammation Potential of Aster koraiensis Extract for Dry Eye Syndrome by the Protection of Ocular Surface. Nutrients 2020; 12:nu12113245. [PMID: 33113960 PMCID: PMC7690718 DOI: 10.3390/nu12113245] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/16/2020] [Accepted: 10/17/2020] [Indexed: 12/18/2022] Open
Abstract
Dry eye syndrome (DES) is a corneal disease often characterized by an irritating, itching feeling in the eyes and light sensitivity. Inflammation and endoplasmic reticulum (ER) stress may play a crucial role in the pathogenesis of DES, although the underlying mechanism remains elusive. Aster koraiensis has been used traditionally as an edible herb in Korea. It has been reported to have wound-healing and inhibitory effects against insulin resistance and inflammation. Here, we examined the inhibitory effects of inflammation and ER stress by A. koraiensis extract (AKE) in animal model and human retinal pigmented epithelial (ARPE-19) cells. Oral administration of AKE mitigated DE symptoms, including reduced corneal epithelial thickness, increased the gap between lacrimal gland tissues in experimental animals and decreased tear production. It also inhibited inflammatory responses in the corneal epithelium and lacrimal gland. Consequently, the activation of NF-κB was attenuated by the suppression of cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2). Moreover, AKE treatment ameliorated TNF-α-inducible ocular inflammation and thapsigargin (Tg)-inducible ER stress in animal model and human retinal pigmented epithelial (ARPE-19) cells. These results prove that AKE prevents detrimental functional and histological remodeling on the ocular surface and in the lacrimal gland through inhibition of inflammation and ER stress, suggesting its potential as functional food material for improvement of DES.
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Affiliation(s)
- Sung-Chul Hong
- Natural Informatics Research Center, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea;
| | - Jung-Heun Ha
- Research Center for Industrialization of Natural Neutralization, Dankook University, Cheonan 31116, Korea;
- Department of Food Science and Nutrition, Dankook University, Cheonan 31116, Korea
| | - Jennifer K. Lee
- Food Science & Human Nutrition Department, University of Florida, Gainesville, FL 32611, USA;
| | - Sang Hoon Jung
- Natural Product Research Center, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea;
- Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology (UST), Daejeon 34113, Korea
| | - Jin-Chul Kim
- Natural Informatics Research Center, Korea Institute of Science and Technology (KIST), Gangneung 25451, Korea;
- Correspondence: ; Tel.: +82-33-650-3515
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Chemical profile and nutraceutical features of Salsola soda (agretti): Anti-inflammatory and antidiabetic potential of its flavonoids. FOOD BIOSCI 2020. [DOI: 10.1016/j.fbio.2020.100713] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Nhoek P, Ahn J, Chae HS, Pel P, Kim YM, Lee SE, Lee JH, Kim J, Choi YH, Lee K, Chin YW. Isolation of polyacetylenes with proprotein convertase/kexin type 9 downregulating activity and two new sesquiterpenes from the aerial parts of Aster koraiensis. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151957] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Kwon J, Ko K, Zhang L, Zhao D, Yang HO, Kwon HC. An Autophagy Inducing Triterpene Saponin Derived from Aster koraiensis. Molecules 2019; 24:molecules24244489. [PMID: 31817934 PMCID: PMC6943805 DOI: 10.3390/molecules24244489] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 11/30/2019] [Accepted: 12/04/2019] [Indexed: 12/13/2022] Open
Abstract
Autophagy is an important self-degradative mechanism that plays a key role in treating neurodegeneration diseases. This research aimed at discovering bioactive compounds from Aster koraiensis. A new triterpene saponin, astersaponin I (1), was isolated from the EtOH extract of A. koraiensis. The structure of 1 was characterized by spectroscopic methods, ECD calculation, and acid hydrolysis. The biochemical analysis showed that compound 1 significantly increased the expression of microtubule-associated protein 1A/1B light chain 3B (LC3-II) expression in SH-SY5Y cells, which indicates the induction of autophagy. Thus, further study may be needed to clarify whether compound 1 exerts beneficial effects on neurodegeneration diseases like Parkinson's disease through autophagy induction.
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Affiliation(s)
- Jaeyoung Kwon
- Natural Product Informatics Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute, Gangneung 25451, Korea; (J.K.); (K.K.)
| | - Keebeom Ko
- Natural Product Informatics Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute, Gangneung 25451, Korea; (J.K.); (K.K.)
| | - Lijun Zhang
- Natural Product Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute, Gangneung 25451, Korea; (L.Z.); (D.Z.)
| | - Dong Zhao
- Natural Product Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute, Gangneung 25451, Korea; (L.Z.); (D.Z.)
| | - Hyun Ok Yang
- Natural Product Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute, Gangneung 25451, Korea; (L.Z.); (D.Z.)
- Division of Bio-medical Science and Technology, KIST School, Korea Institute of Science and Technology (KIST), Seoul 02792, Korea
- Correspondence: (H.O.Y.); (H.C.K.); Tel.: +82-33-650-3501 (H.O.Y.); +82-33-650-3504 (H.C.K.)
| | - Hak Cheol Kwon
- Natural Product Informatics Research Center, Korea Institute of Science and Technology (KIST) Gangneung Institute, Gangneung 25451, Korea; (J.K.); (K.K.)
- Correspondence: (H.O.Y.); (H.C.K.); Tel.: +82-33-650-3501 (H.O.Y.); +82-33-650-3504 (H.C.K.)
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An JP, Ha TKQ, Kim HW, Ryu B, Kim J, Park J, Lee CH, Oh WK. Eudesmane Glycosides from Ambrosia artemisiifolia (Common Ragweed) as Potential Neuroprotective Agents. JOURNAL OF NATURAL PRODUCTS 2019; 82:1128-1138. [PMID: 31009220 DOI: 10.1021/acs.jnatprod.8b00841] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In Alzheimer's disease, amyloid-β (Aβ) accumulation in the brain results in neuronal cell death and is one of the major causes of dementia. Because the current therapeutic agents are not yet sufficiently effective or safe, there have been attempts to find new neuroprotective chemicals against Aβ-induced cytotoxicity. A 70% EtOH extract of whole plants of Ambrosia artemisiifolia (common ragweed) was selected after the screening of a natural extract library. Seven new eudesmane-type glycosides (1-7) and seven known compounds (8-14) were obtained through bioactivity-guided fractionation from the aerial parts of this plant. Their structures were determined on the basis of their nuclear magnetic resonance spectra, high-resolution electrospray ionization mass spectrometry analysis, and electronic circular dichroism calculations. Among them, compounds 1, 2, 4-6, 8, 9, 11, 13, and 14 showed protective effects against Aβ-induced cytotoxicity in Aβ42-transfected HT22 cells. The most active compounds, 5 and 6, exhibited moderate protective activity dose-dependently (10, 20, and 40 μM).
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Affiliation(s)
- Jin-Pyo An
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
| | - Thi Kim Quy Ha
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
| | - Hyun Woo Kim
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
| | - Byeol Ryu
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
| | - Jinwoong Kim
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
| | - Junsoo Park
- Division of Biological Science and Technology , Yonsei University , Wonju 220-100 , Republic of Korea
| | - Chul Ho Lee
- Laboratory Animal Resource Center , Korea Research Institute of Bioscience and Biotechnology (KRIBB) , Daejeon 34141 , Republic of Korea
| | - Won Keun Oh
- Korea Bioactive Natural Material Bank, Research Institute of Pharmaceutical Sciences, College of Pharmacy , Seoul National University , Seoul 08826 , Republic of Korea
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Kim J, Hyun SW, Lee IS, Jo K, Kim YS, Kim JS, Kim CS. Aster koraiensis extract lowers postprandial glucose in normoglycemic and high-fat-diet-induced obese mice. Food Sci Biotechnol 2019; 28:563-568. [PMID: 30956869 PMCID: PMC6431321 DOI: 10.1007/s10068-018-0497-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 10/08/2018] [Accepted: 10/16/2018] [Indexed: 11/28/2022] Open
Abstract
The Aster koraiensis extract (ASKO) is a newly developed dietary herbal supplement. In this study, the potent blood glucose-lowering activity of ASKO in vitro and in vivo was investigated. In an in vitro glucose uptake assay, ASKO was found to enhance glucose transport in 3T3-L1 adipocytes. Oral administration of ASKO significantly reduced glucose levels in normoglycemic mice during oral glucose tolerance tests (OGTTs). In a long-term efficacy study, 4 weeks of oral ASKO treatment significantly attenuated blood glucose levels during OGTTs in diet-induced obese (DIO) mice. ASKO also enhanced plasma insulin levels after glucose loading, leading to a reduction in blood glucose levels. In addition, ASKO normalized glucose transporter-4 mRNA expression in the muscles of DIO mice. These results indicate that ASKO has postprandial glucose-lowering effects and could be beneficial in the management of prediabetes or type 2 diabetes mellitus.
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Affiliation(s)
- Junghyun Kim
- Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine, 1672 Yusengdae-ro, Daejeon, 34054 Republic of Korea
- Department of Oral Pathology, School of Dentistry, Chonbuk National University, Jeonju, 54896 Republic of Korea
| | - Soo-Wang Hyun
- Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine, 1672 Yusengdae-ro, Daejeon, 34054 Republic of Korea
| | - Ik Soo Lee
- Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine, 1672 Yusengdae-ro, Daejeon, 34054 Republic of Korea
| | - Kyuhyung Jo
- Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine, 1672 Yusengdae-ro, Daejeon, 34054 Republic of Korea
| | - Young Sook Kim
- Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine, 1672 Yusengdae-ro, Daejeon, 34054 Republic of Korea
| | - Jin Sook Kim
- Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine, 1672 Yusengdae-ro, Daejeon, 34054 Republic of Korea
| | - Chan-Sik Kim
- Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine, 1672 Yusengdae-ro, Daejeon, 34054 Republic of Korea
- Korean Medicine Life Science, University of Science Technology (UST), Daejeon, 34113 Republic of Korea
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Cataract Preventive Role of Isolated Phytoconstituents: Findings from a Decade of Research. Nutrients 2018; 10:nu10111580. [PMID: 30373159 PMCID: PMC6265913 DOI: 10.3390/nu10111580] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 10/10/2018] [Accepted: 10/15/2018] [Indexed: 12/19/2022] Open
Abstract
Cataract is an eye disease with clouding of the eye lens leading to disrupted vision, which often develops slowly and causes blurriness of the eyesight. Although the restoration of the vision in people with cataract is conducted through surgery, the costs and risks remain an issue. Botanical drugs have been evaluated for their potential efficacies in reducing cataract formation decades ago and major active phytoconstituents were isolated from the plant extracts. The aim of this review is to find effective phytoconstituents in cataract treatments in vitro, ex vivo, and in vivo. A literature search was synthesized from the databases of Pubmed, Science Direct, Google Scholar, Web of Science, and Scopus using different combinations of keywords. Selection of all manuscripts were based on inclusion and exclusion criteria together with analysis of publication year, plant species, isolated phytoconstituents, and evaluated cataract activities. Scientists have focused their attention not only for anti-cataract activity in vitro, but also in ex vivo and in vivo from the review of active phytoconstituents in medicinal plants. In our present review, we identified 58 active phytoconstituents with strong anti-cataract effects at in vitro and ex vivo with lack of in vivo studies. Considering the benefits of anti-cataract activities require critical evaluation, more in vivo and clinical trials need to be conducted to increase our understanding on the possible mechanisms of action and the therapeutic effects.
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Kim J, Jo K, Kim CS, Kim JS. Aster koraiensis extract prevents diabetes-induced retinal vascular dysfunction in spontaneously diabetic Torii rats. Altern Ther Health Med 2017; 17:497. [PMID: 29169356 PMCID: PMC5701358 DOI: 10.1186/s12906-017-1998-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 11/09/2017] [Indexed: 12/29/2022]
Abstract
BACKGROUND Aster koraiensis extract (AKE) is a standard dietary herbal supplement. The aim of this study is to investigate the inhibitory effects of AKE on diabetes-induced retinal vascular dysfunction in Spontaneously Diabetic Torii (SDT) rats. METHODS AKE (50 and 100 mg/kg body weight/day) was administered for 16 weeks. The effects of orally administered AKE on blood glucose levels, retinal vascular leakage, apoptosis, and accumulation of advanced glycation end products (AGEs) in the retina were evaluated. RESULTS SDT rats exhibited hyperglycemia and retinal vascular leakage, and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) staining was clearly detected apoptosis in the retinal microvasculature. Immunofluorescence staining revealed the accumulation of AGEs in the retinal vasculature of the SDT rats. However, oral administration of AKE for 16 weeks blocked diabetes-induced blood-retinal barrier (BRB) breakdown and the loss of occludin, which is an important tight junction protein. Apoptosis of retinal vascular cells and AGE accumulation were significantly inhibited after AKE treatment. CONCLUSION These results indicate that, as a dietary herbal supplement, AKE may have beneficial effects on patients with diabetic retinopathy.
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Kim J, Jo K, Lee IS, Kim CS, Kim JS. The Extract of Aster Koraiensis Prevents Retinal Pericyte Apoptosis in Diabetic Rats and Its Active Compound, Chlorogenic Acid Inhibits AGE Formation and AGE/RAGE Interaction. Nutrients 2016; 8:nu8090585. [PMID: 27657123 PMCID: PMC5037569 DOI: 10.3390/nu8090585] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 09/05/2016] [Accepted: 09/13/2016] [Indexed: 12/31/2022] Open
Abstract
Retinal capillary cell loss is a hallmark of early diabetic retinal changes. Advanced glycation end products (AGEs) are believed to contribute to retinal microvascular cell loss in diabetic retinopathy. In this study, the protective effects of Aster koraiensis extract (AKE) against damage to retinal vascular cells were investigated in streptozotocin (STZ)-induced diabetic rats. To examine this issue further, AGE accumulation, nuclear factor-kappaB (NF-κB) and inducible nitric oxide synthase (iNOS) were investigated using retinal trypsin digests from streptozotocin-induced diabetic rats. In the diabetic rats, TUNEL (Terminal deoxynucleotidyl transferase mediated dUTP Nick End Labeling)-positive retinal microvascular cells were markedly increased. Immunohistochemical studies revealed that AGEs were accumulated within the retinal microvascular cells, and this accumulation paralleled the activation of NF-κB and the expression of iNOS in the diabetic rats. However, AKE prevented retinal microvascular cell apoptosis through the inhibition of AGE accumulation and NF-κB activation. Moreover, to determine the active compounds of AKE, two major compounds, chlorogenic acid and 3,5-di-O-caffeoylquinic acid, were tested in an in vitro assay. Among these compounds, chlorogenic acid significantly reduced AGE formation as well as AGE/RAGE (receptor for AGEs) binding activity. These results suggest that AKE, particularly chlorogenic acid, is useful in inhibiting AGE accumulation in retinal vessels and exerts a preventive effect against the injuries of diabetic retinal vascular cells.
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Affiliation(s)
- Junghyun Kim
- Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
| | - Kyuhyung Jo
- Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
| | - Ik-Soo Lee
- Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
| | - Chan-Sik Kim
- Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
| | - Jin Sook Kim
- Korean Medicine Convergence Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
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Wang YM, Zhao JQ, Zhou SY, Yang JL, Yao XJ, Tao YD, Mei LJ, Shi YP. New sesquiterpenes and benzofuran derivatives from the aerial parts of Asterothamnus centrali-asiaticus. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.06.061] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
This review covers the isolation, structural determination, synthesis and chemical and microbiological transformations of natural sesquiterpenoids. The literature from January to December 2012 is reviewed, and 471 references are cited.
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Affiliation(s)
- Braulio M Fraga
- Instituto de Productos Naturales y Agrobiología, CSIC, 38206-La Laguna, Tenerife, Canary Islands, Spain
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