1
|
Wen C, Dechsupa N, Yu Z, Zhang X, Liang S, Lei X, Xu T, Gao X, Hu Q, Innuan P, Kantapan J, Lü M. Pentagalloyl Glucose: A Review of Anticancer Properties, Molecular Targets, Mechanisms of Action, Pharmacokinetics, and Safety Profile. Molecules 2023; 28:4856. [PMID: 37375411 DOI: 10.3390/molecules28124856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 06/07/2023] [Accepted: 06/15/2023] [Indexed: 06/29/2023] Open
Abstract
Pentagalloyl glucose (PGG) is a natural hydrolyzable gallotannin abundant in various plants and herbs. It has a broad range of biological activities, specifically anticancer activities, and numerous molecular targets. Despite multiple studies available on the pharmacological action of PGG, the molecular mechanisms underlying the anticancer effects of PGG are unclear. Here, we have critically reviewed the natural sources of PGG, its anticancer properties, and underlying mechanisms of action. We found that multiple natural sources of PGG are available, and the existing production technology is sufficient to produce large quantities of the required product. Three plants (or their parts) with maximum PGG content were Rhus chinensis Mill, Bouea macrophylla seed, and Mangifera indica kernel. PGG acts on multiple molecular targets and signaling pathways associated with the hallmarks of cancer to inhibit growth, angiogenesis, and metastasis of several cancers. Moreover, PGG can enhance the efficacy of chemotherapy and radiotherapy by modulating various cancer-associated pathways. Therefore, PGG can be used for treating different human cancers; nevertheless, the data on the pharmacokinetics and safety profile of PGG are limited, and further studies are essential to define the clinical use of PGG in cancer therapies.
Collapse
Affiliation(s)
- Chengli Wen
- Department of Intensive Care Medicine, Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
- Molecular Imaging and Therapy Research Unit, Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
- Luzhou Key Laboratory of Human Microecology and Precision Diagnosis and Treatment, Luzhou 646000, China
| | - Nathupakorn Dechsupa
- Molecular Imaging and Therapy Research Unit, Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Zehui Yu
- Laboratory Animal Center, Southwest Medical University, Luzhou 646000, China
| | - Xu Zhang
- Luzhou Key Laboratory of Human Microecology and Precision Diagnosis and Treatment, Luzhou 646000, China
- Department of Gastroenterology, Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Sicheng Liang
- Luzhou Key Laboratory of Human Microecology and Precision Diagnosis and Treatment, Luzhou 646000, China
- Department of Gastroenterology, Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Xianying Lei
- Department of Intensive Care Medicine, Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Tao Xu
- Department of Intensive Care Medicine, Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Xiaolan Gao
- Department of Intensive Care Medicine, Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Qinxue Hu
- Department of Intensive Care Medicine, Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Phattarawadee Innuan
- Molecular Imaging and Therapy Research Unit, Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Jiraporn Kantapan
- Molecular Imaging and Therapy Research Unit, Department of Radiologic Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Muhan Lü
- Luzhou Key Laboratory of Human Microecology and Precision Diagnosis and Treatment, Luzhou 646000, China
- Department of Gastroenterology, Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| |
Collapse
|
2
|
Chemical Characteristics and Antioxidant Activity of Arctostaphylos uva-ursi L. Spreng. at the Southern Border of the Geographical Range of the Species in Europe. Molecules 2021; 26:molecules26247692. [PMID: 34946773 PMCID: PMC8707569 DOI: 10.3390/molecules26247692] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/14/2021] [Accepted: 12/15/2021] [Indexed: 01/28/2023] Open
Abstract
The bearberry (Arctostaphylos uva-ursi L. Spreng.) is a source of herbal material—bearberry leaf (Uvae ursi folium), which is highly valued and sought by pharmaceutical and cosmetic industries. For many years, leaves of this plant have been used in traditional medicine as a diuretic, antimicrobial, and anti-inflammatory agent for various diseases of the urogenital tract. The bearberry has also been proposed as a natural antioxidant additive due to the high contents of phenolic compounds in its leaves. The study was focused on characterization of the basic phytochemical composition and antioxidant activity of extracts derived from bearberry leaves collected from plants located at the southern border of the geographical range of the species in Europe. The investigated herbal material is characterized by a different chemical profile compared to the chemical profiles of bearberry found in other parts of the continent. Bearberry extracts from plants growing in two different habitat types—heathlands and pine forests showed a wide range of variation, especially in the concentration of hyperoside, corilagin, and methylartutin and the total flavonoid contents. In addition to arbutin, bearberry can be a valuable source of phenolic compounds, which are mainly responsible for the antioxidant properties of extracts. The high content of phenols and high values of antioxidant parameters indicate a high potential of bearberry leaves to be used as a powerful natural source of antioxidants in herbal preparations. Therefore, the A. uva-ursi populations can be a source of plant material for pharmaceutical, cosmetic, and food industries.
Collapse
|
3
|
Zhang J, Chen D, Han DM, Cheng YH, Dai C, Wu XJ, Che FY, Heng XY. Tannic acid mediated induction of apoptosis in human glioma Hs 683 cells. Oncol Lett 2018; 15:6845-6850. [PMID: 29849785 PMCID: PMC5962853 DOI: 10.3892/ol.2018.8197] [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: 11/07/2016] [Accepted: 11/03/2017] [Indexed: 02/07/2023] Open
Abstract
Tannic acid (TA), a natural plant compound, is known to induce the death of cancer cells in various types of cancer. The present study was designed with the aim of exploring the effects of tannic acid in vitro on HS 683, a glioma cell line, and to study the mechanism involved in the induction of cytotoxicity and apoptosis by TA. TA exhibited maximum cytotoxic activity against the Hs 683 cell line. Nuclear morphology, 4′,6-diamidino-2-phenylindole staining and annexin V/propidium iodide apoptosis assaying of Hs 683 cells confirmed that cell death was due to the induction of apoptosis by TA. Further mechanistic study of TA on Hs 683 cells revealed that it decreased cell growth with increasing TA concentration, that resulted in the activation of pro-caspase 3 and caspase 9 and the cleavage of poly (ADP-ribose) polymerase, implying the induction of apoptosis cascades. Biochemical evidence of apoptosis resulted from the loss of mitochondrial membrane potential and increased intracellular reactive oxygen species production by TA in a dose-dependent manner. Based on this data, TA may be further investigated as a potential anticancer therapeutic lead.
Collapse
Affiliation(s)
- Jian Zhang
- Department of Neurosurgery, Linyi People's Hospital, Linyi, Shandong 276000, P.R. China
| | - Dong Chen
- Department of Clinical College, Binzhou Medical University, Yantai, Shandong 264000, P.R. China
| | - Dian-Ming Han
- Department of Clinical College, Binzhou Medical University, Yantai, Shandong 264000, P.R. China
| | - Yan-Hao Cheng
- Department of Neurosurgery, Linyi People's Hospital, Linyi, Shandong 276000, P.R. China
| | - Chao Dai
- Department of Neurosurgery, Linyi People's Hospital, Linyi, Shandong 276000, P.R. China
| | - Xiu-Jie Wu
- Department of Neurosurgery, Linyi People's Hospital, Linyi, Shandong 276000, P.R. China
| | - Feng-Yuan Che
- Department of Neurology, Linyi People's Hospital, Linyi, Shandong 276000, P.R. China
| | - Xue-Yuan Heng
- Department of Neurosurgery, Linyi People's Hospital, Linyi, Shandong 276000, P.R. China
| |
Collapse
|
4
|
Tseeleesuren D, Kant R, Yen CH, Hsiao HH, Chen YMA. 1,2,3,4,6-Penta- O-Galloyl-Beta-D-Glucopyranoside Inhibits Proliferation of Multiple Myeloma Cells Accompanied with Suppression of MYC Expression. Front Pharmacol 2018; 9:65. [PMID: 29472861 PMCID: PMC5810280 DOI: 10.3389/fphar.2018.00065] [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: 08/30/2017] [Accepted: 01/18/2018] [Indexed: 11/21/2022] Open
Abstract
Multiple myeloma (MM) still remains an incurable disease, therefore discovery of novel drugs boosts the therapeutics for MM. The natural compound 1,2,3,4,6-Penta-O-galloyl-beta-D-glucopyranoside (PGG) has been shown to exhibit antitumor activities against various cancer cells. Here, we aim to evaluate antitumor effects of PGG on MM cell lines. PGG inhibited the growth of three different MM cell lines in a dose- and time-dependent manner. Cell cycle analysis revealed that PGG treatment caused cell cycle arrest in G1 phase. It also induced apoptosis which was indicated by significant increases of Annexin V positive cells, caspase 3/7 activity, and cleaved caspase 3 expression in PGG treated MM cell. Since MYC is frequently hyperactivated in MM and inhibition of MYC leads to MM cell death. We further demonstrated that PGG decreased MYC expression in protein and mRNA levels and reversed the mRNA expression of MYC target genes such as p21, p27, and cyclin D2. In addition, PGG also reduced protein expression of DEPTOR which is commonly overexpressed in MM. Unexpectedly, PGG antagonized the cytotoxic effect of bortezomib in the combination treatment. However, PGG treatment sensitized MM cells to another proteasome inhibitor MG132 induced cytotoxicity. Moreover, MYC inhibitor JQ1 enhanced the cytotoxic effect of bortezomib on MM cells. Our findings raised concerns about the combinatory use of bortezomib with particular types of chemicals. The evidence also provide useful insights into the combination of MYC and proteasome-inhibitors for MM therapy. Finally, PGG has a therapeutic potential for treatment of MM and further development is mandatory.
Collapse
Affiliation(s)
- Duurenjargal Tseeleesuren
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Center for Infectious Disease and Cancer Research, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Rajni Kant
- Center for Infectious Disease and Cancer Research, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Chia-Hung Yen
- Center for Infectious Disease and Cancer Research, Kaohsiung Medical University, Kaohsiung, Taiwan.,Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.,Research Center for Natural Products and Drug Development, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hui-Hua Hsiao
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Division of Hematology-Oncology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.,Faculty of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yi-Ming A Chen
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Center for Infectious Disease and Cancer Research, Kaohsiung Medical University, Kaohsiung, Taiwan.,Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| |
Collapse
|
5
|
Galloylation of polyphenols alters their biological activity. Food Chem Toxicol 2017; 105:223-240. [DOI: 10.1016/j.fct.2017.04.021] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 03/23/2017] [Accepted: 04/15/2017] [Indexed: 01/08/2023]
|
6
|
Nie F, Liang Y, Jiang B, Li X, Xun H, He W, Lau HT, Ma X. Apoptotic effect of tannic acid on fatty acid synthase over-expressed human breast cancer cells. Tumour Biol 2015; 37:2137-43. [PMID: 26349913 DOI: 10.1007/s13277-015-4020-z] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Accepted: 08/31/2015] [Indexed: 11/26/2022] Open
Abstract
Breast cancer is one of the most common cancers and is the second leading cause of cancer mortality in women worldwide. Novel therapies and chemo-therapeutic drugs are urgently needed to be developed for the treatment of breast cancer. Increasing evidence suggests that fatty acid synthase (FAS) plays an important role in breast cancer, for the expression of FAS is significantly higher in human breast cancer cells than in normal cells. Tannic acid (TA), a natural polyphenol, possesses significant biological functions, including bacteriostasis, hemostasis, and anti-oxidant. Our previous studies demonstrated that TA is a natural FAS inhibitor whose inhibitory activity is stronger than that of classical FAS inhibitors, such as C75 and cerulenin. This study further assessed the effect and therapeutic potential of TA on FAS over-expressed breast cancer cells, and as a result, TA had been proven to possess the functions of inhibiting intracellular FAS activity, down-regulating FAS expression in human breast cancer MDA-MB-231 and MCF-7 cells, and inducing cancer cell apoptosis. Since high-expressed FAS is recognized as a molecular marker for breast cancer and plays an important role in cancer prognosis, these findings suggest that TA is a potential drug candidate for treatment of breast cancer.
Collapse
Affiliation(s)
- Fangyuan Nie
- College of Life Sciences, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Yan Liang
- School of Kinesiology and Health, Capital University of Physical Education and Sports, No. 11 Beisanhuanxi Road, Beijing, 100191, China
| | - Bing Jiang
- College of Life Sciences, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
| | - Xiabing Li
- State Forestry Administration, International Centre for Bamboo and Rattan Academy of Bioresource Utilization, Beijing, 100102, China
| | - Hang Xun
- State Forestry Administration, International Centre for Bamboo and Rattan Academy of Bioresource Utilization, Beijing, 100102, China
| | - Wei He
- Gaubau Kender (Aletai, Xinjiang) Limited Company, Aletai, 836500, China
| | - Hay Tong Lau
- Gaubau Kender (Aletai, Xinjiang) Limited Company, Aletai, 836500, China
| | - Xiaofeng Ma
- College of Life Sciences, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China.
| |
Collapse
|
7
|
Liu S, Chen R, Hagedorn CH. Tannic Acid Inhibits Hepatitis C Virus Entry into Huh7.5 Cells. PLoS One 2015; 10:e0131358. [PMID: 26186636 PMCID: PMC4505941 DOI: 10.1371/journal.pone.0131358] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 06/01/2015] [Indexed: 12/15/2022] Open
Abstract
Chronic infection with the hepatitis C virus (HCV) is a cause of cirrhosis and hepatocellular carcinoma worldwide. Although antiviral therapy has dramatically improved recently, a number of patients remain untreated and some do not clear infection with treatment. Viral entry is an essential step in initiating and maintaining chronic HCV infections. One dramatic example of this is the nearly 100% infection of newly transplanted livers in patients with chronic hepatitis C. HCV entry inhibitors could play a critical role in preventing HCV infection of newly transplanted livers. Tannic acid, a polymer of gallic acid and glucose molecules, is a plant-derived polyphenol that defends some plants from insects and microbial infections. It has been shown to have a variety of biological effects, including antiviral activity, and is used as a flavoring agent in foods and beverages. In this study, we demonstrate that tannic acid is a potent inhibitor of HCV entry into Huh7.5 cells at low concentrations (IC50 5.8 μM). It also blocks cell-to-cell spread in infectious HCV cell cultures, but does not inhibit HCV replication following infection. Moreover, experimental results indicate that tannic acid inhibits an early step of viral entry, such as the docking of HCV at the cell surface. Gallic acid, tannic acid’s structural component, did not show any anti-HCV activity including inhibition of HCV entry or replication at concentrations up to 25 μM. It is possible the tannin structure is related on the effect on HCV inhibition. Tannic acid, which is widely distributed in plants and foods, has HCV antiviral activity in cell culture at low micromolar concentrations, may provide a relative inexpensive adjuvant to direct-acting HCV antivirals and warrants future investigation.
Collapse
Affiliation(s)
- Shuanghu Liu
- Department of Medicinal Chemistry, College of Pharmacy, University of Utah, Salt Lake City, UT, United States of America; Department of Medicine, University of Utah, Salt Lake City, UT, United States of America
| | - Ren Chen
- Department of Medicine, University of Utah, Salt Lake City, UT, United States of America
| | - Curt H Hagedorn
- Department of Medicine, University of Utah, Salt Lake City, UT, United States of America; Department of Medicine, University of Arkansas for Medical Sciences Little Rock, AR, United States of America; Program in Genetics, University of Arkansas for Medical Sciences Little Rock, AR, United States of America; The Central Arkansas Veterans Healthcare System, Little Rock, AR, United States of America
| |
Collapse
|
8
|
Ha JY, Kim MK, Lee JY, Choi EB, Hong CO, Lee BW, Bae CH, Kim KK. Isolation and Structure Identification of Photosensitizer from Perilla frutescens Leaves Which Induces Apoptosis in U937. ACTA ACUST UNITED AC 2015. [DOI: 10.5352/jls.2015.25.1.53] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
9
|
The synthesis and antitumor activity of twelve galloyl glucosides. Molecules 2015; 20:2034-60. [PMID: 25633333 PMCID: PMC6272398 DOI: 10.3390/molecules20022034] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Revised: 01/05/2015] [Accepted: 01/21/2015] [Indexed: 12/31/2022] Open
Abstract
Twelve galloyl glucosides 1-12, showing diverse substitution patterns with two or three galloyl groups, were synthesized using commercially available, low-cost D-glucose and gallic acid as starting materials. Among them, three compounds, methyl 3,6-di-O-galloyl-α-D-glucopyranoside (9), ethyl 2,3-di-O-galloyl-α-D-glucopyranoside (11) and ethyl 2,3-di-O-galloyl-β-D-glucopyranoside (12), are new compounds and other six, 1,6-di-O-galloyl-β-D-glucopyranose (1), 1,4,6-tri-O-galloyl-β-D-glucopyranose (2), 1,2-di-O-galloyl-β-D-glucopyranose (3), 1,3-di-O-galloyl-β-D-glucopyranose (4), 1,2,3-tri-O-galloyl-α-D-glucopyranose (6) and methyl 3,4,6-tri-O-galloyl-α-D-glucopyranoside (10), were synthesized for the first time in the present study. In in vitro MTT assay, 1-12 inhibited human cancer K562, HL-60 and HeLa cells with inhibition rates ranging from 64.2% to 92.9% at 100 μg/mL, and their IC50 values were determined to be varied in 17.2-124.7 μM on the tested three human cancer cell lines. In addition, compounds 1-12 inhibited murine sarcoma S180 cells with inhibition rates ranging from 38.7% to 52.8% at 100 μg/mL in the in vitro MTT assay, and in vivo antitumor activity of 1 and 2 was also detected in murine sarcoma S180 tumor-bearing Kunming mice using taxol as positive control.
Collapse
|
10
|
Alzoubi K, Honisch S, Abed M, Lang F. Triggering of suicidal erythrocyte death by penta-O-galloyl-β-D-glucose. Toxins (Basel) 2013; 6:54-65. [PMID: 24368324 PMCID: PMC3920249 DOI: 10.3390/toxins6010054] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 12/11/2013] [Accepted: 12/18/2013] [Indexed: 01/17/2023] Open
Abstract
The polyphenolic 1,2,3,4,6-penta-O-galloyl-beta-d-glucose from several medicinal herbs triggers apoptosis and has, thus, been proposed for treatment of malignancy. The substance is at least partially effective through caspase activation. In analogy to apoptosis of nucleated cells, erythrocytes may enter suicidal death or eryptosis, which is characterized by cell shrinkage and by phosphatidylserine translocation to the erythrocyte surface. Eryptosis is triggered by increase of cytosolic Ca2+-activity ([Ca2+]i). The sensitivity to [Ca2+]i is enhanced by ceramide. The present study explored whether penta-O-galloyl-β-d-glucose stimulates eryptosis. Cell volume was estimated from forward scatter, phosphatidylserine exposure from annexin V binding, hemolysis from hemoglobin-release, [Ca2+]i from Fluo3-fluorescence and ceramide abundance from fluorescent antibodies. A 48-h exposure of human erythrocytes to penta-O-galloyl-β-d-glucose significantly decreased forward scatter (50 µM) and significantly increased annexin V binding (10 µM). Up to 50 µM penta-O-galloyl-β-d-glucose did not significantly modify [Ca2+]i. However, the effect of penta-O-galloyl-β-d-glucose (25 µM) induced annexin V binding was slightly, but significantly, blunted by removal of extracellular Ca2+, pointing to sensitization of erythrocytes to the scrambling effect of Ca2+. Penta-O-galloyl-β-d-glucose (25 µM) further increased ceramide formation. In conclusion, penta-O-galloyl-β-d-glucose stimulates suicidal erythrocyte death or eryptosis, an effect partially due to stimulation of ceramide formation with subsequent sensitization of erythrocytes to Ca2+.
Collapse
Affiliation(s)
| | | | | | - Florian Lang
- Department of Physiology, University of Tuebingen, Gmelinstraße 5, 72076 Tuebingen, Germany.
| |
Collapse
|
11
|
Mohan CG, Viswanatha GL, Savinay G, Rajendra CE, Halemani PD. 1,2,3,4,6 Penta-O-galloyl-β-d-glucose, a bioactivity guided isolated compound from Mangifera indica inhibits 11β-HSD-1 and ameliorates high fat diet-induced diabetes in C57BL/6 mice. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2013; 20:417-426. [PMID: 23353053 DOI: 10.1016/j.phymed.2012.12.020] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2012] [Revised: 12/01/2012] [Accepted: 12/25/2012] [Indexed: 06/01/2023]
Abstract
Methanolic leaf extract of Mangifera indica (MEMI) was subjected to bioactivity guided fractionation in order to identify the active antidiabetic constituent. 32 fractions were evaluated for possible 11β-HSD-1 inhibition activity under in vitro conditions. The EA-7/8-9/10-4 fraction was evolved as a most potent fraction among all the fractions and it was identified as well known gallotannin compound 1,2,3,4,6 penta-O-galloyl-β-d-glucose (PGG) by spectral analysis. Based on these results the PGG was further evaluated in ex vivo 11β-HSD-1 inhibition assay and high fat diet (HFD)-induced diabetes in male C57BL/6 mice. Single dose (10, 25, 50 and 100mg/kg) of PGG and carbenoxolone (CBX) have dose dependently inhibited the 11β-HSD-1 activity in liver and adipose tissue. Furthermore, HFD appraisal to male C57BL/6 mice caused severe hyperglycemia, hypertriglyceridemia, elevated levels of plasma corticosterone and insulin, increased liver and white adipose mass with increase in body weight was observed compare to normal control. Also, oral glucose tolerance was significantly impaired compare to normal control. Interestingly, post-treatment with PGG for 21 days had alleviated the HFD-induced biochemical alterations and improved oral glucose tolerance compare to HFD-control. In conclusion, the PGG isolated from MEMI inhibits 11β-HSD-1 activity and ameliorates HFD-induced diabetes in male C57BL/6 mice.
Collapse
Affiliation(s)
- C G Mohan
- Department of Pharmacognosy, Government College of Pharmacy, Bangalore, India.
| | | | | | | | | |
Collapse
|
12
|
Azab HA, Hussein BH, El-Azab MF, Gomaa M, El-Falouji AI. Bis(acridine-9-carboxylate)-nitro-europium(III) dihydrate complex a new apoptotic agent through Flk-1 down regulation, caspase-3 activation and oligonucleosomes DNA fragmentation. Bioorg Med Chem 2013. [DOI: 10.1016/j.bmc.2012.10.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
13
|
Bhouri W, Boubaker J, Skandrani I, Ghedira K, Chekir Ghedira L. Investigation of the apoptotic way induced by digallic acid in human lymphoblastoid TK6 cells. Cancer Cell Int 2012; 12:26. [PMID: 22686580 PMCID: PMC3487787 DOI: 10.1186/1475-2867-12-26] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Accepted: 05/29/2012] [Indexed: 11/16/2022] Open
Abstract
Background The digallic acid (DGA) purified from Pistacia lentiscus. L fruits was investigated for its antiproliferative and apoptotic activities on human lymphoblastoid TK6 cells. Methods We attempt to characterize the apoptotic pathway activated by DGA. Apoptosis was detected by DNA fragmentation, PARP cleavage and by evaluating caspase activities. Results The inhibition of lymphoblastoid cell proliferation was noted from 8.5 μg/ml of DGA. The induction of apoptosis was confirmed by DNA fragmentation and PARP cleavage. We have demonstrated that DGA induces apoptosis by activating the caspase-8 extrinsic pathway. Caspase-3 was also activated in a dose dependent manner. Conclusion In summary, DGA exhibited an apoptosis inductor effect in TK6 cells revealing thus its potential as a cancer-preventive agent.
Collapse
Affiliation(s)
- Wissem Bhouri
- Laboratoire de biologie Cellulaire et Moléculaire, Faculté de Medecine Dentaire Monastir, Rue Avicenne, Monastir, 5000 Tunisia.
| | | | | | | | | |
Collapse
|
14
|
González-Sarrías A, Yuan T, Seeram NP. Cytotoxicity and structure activity relationship studies of maplexins A–I, gallotannins from red maple (Acer rubrum). Food Chem Toxicol 2012; 50:1369-76. [DOI: 10.1016/j.fct.2012.02.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2011] [Revised: 01/18/2012] [Accepted: 02/15/2012] [Indexed: 10/28/2022]
|
15
|
Castañeda DM, Pombo LM, Urueña CP, Hernandez JF, Fiorentino S. A gallotannin-rich fraction from Caesalpinia spinosa (Molina) Kuntze displays cytotoxic activity and raises sensitivity to doxorubicin in a leukemia cell line. Altern Ther Health Med 2012; 12:38. [PMID: 22490328 PMCID: PMC3353181 DOI: 10.1186/1472-6882-12-38] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Accepted: 04/10/2012] [Indexed: 02/02/2023]
Abstract
BACKGROUND Enhancement of tumor cell sensitivity may help facilitate a reduction in drug dosage using conventional chemotherapies. Consequently, it is worthwhile to search for adjuvants with the potential of increasing chemotherapeutic drug effectiveness and improving patient quality of life. Natural products are a very good source of such adjuvants. METHODS The biological activity of a fraction enriched in hydrolysable polyphenols (P2Et) obtained from Caesalpinia spinosa was evaluated using the hematopoietic cell line K562. This fraction was tested alone or in combination with the conventional chemotherapeutic drugs doxorubicin, vincristine, etoposide, camptothecin and taxol. The parameters evaluated were mitochondrial depolarization, caspase 3 activation, chromatin condensation and clonogenic activity. RESULTS We found that the P2Et fraction induced mitochondrial depolarization, activated caspase 3, induced chromatin condensation and decreased the clonogenic capacity of the K562 cell line. When the P2Et fraction was used in combination with chemotherapeutic drugs at sub-lethal concentrations, a fourfold reduction in doxorubicin inhibitory concentration 50 (IC50) was seen in the K562 cell line. This finding suggested that P2Et fraction activity is specific for the molecular target of doxorubicin. CONCLUSIONS Our results suggest that a natural fraction extracted from Caesalpinia spinosa in combination with conventional chemotherapy in combination with natural products on leukemia cells may increase therapeutic effectiveness in relation to leukemia.
Collapse
|
16
|
Ryu HG, Jeong SJ, Kwon HY, Lee HJ, Lee EO, Lee MH, Choi SH, Ahn KS, Kim SH. Penta-O-galloyl-β-D-glucose attenuates cisplatin-induced nephrotoxicity via reactive oxygen species reduction in renal epithelial cells and enhances antitumor activity in Caki-2 renal cancer cells. Toxicol In Vitro 2011; 26:206-14. [PMID: 22172427 DOI: 10.1016/j.tiv.2011.11.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 09/23/2011] [Accepted: 11/17/2011] [Indexed: 01/26/2023]
Abstract
Cisplatin shows limited therapeutic efficacy due to serious side effects such as nephrotoxicity and hepatotoxicity. In the present study, we demonstrate that 1,2,3,4,6-penta-O-galloyl-β-d-glucose (PGG) has protective effects against cisplatin-induced cytotoxicity and apoptosis in normal human primary renal epithelial cells (HRCs) while showing synergistic effect against cisplatin-induced cell death in human Caki-2 renal cancer cells. PGG significantly blocked cisplatin-mediated cytotoxicity and reduced cisplatin-induced sub-G1 accumulation in HRCs. Consistently, PGG reduced the number of apoptotic cell populations by TdT-mediated dUTP nick end labeling (TUNEL) and Live/Dead assays in cisplatin-treated HRCs. Furthermore, PGG suppressed PARP cleavage and caspase-3 activation, cytochrome c release, up-regulation of bax and p53 in cisplatin-treated HRCs. Moreover, PGG attenuated reactive oxygen species (ROS) production mediated by cisplatin treatment, suggesting that PGG prevented cisplatin-induced apoptosis by inhibiting ROS generation in HRCs. Notably, PGG significantly enhanced cytotoxicity and PARP cleavage in cisplatin-treated Caki-2 renal cancer cells. Combination Index (CI) revealed synergism between PGG and cisplatin in Caki-2 cells. Taken together, our findings suggest the dual effects of PGG as a protective supplement against cisplatin-induced toxicity in normal renal cells and a combination chemotherapeutic drug with cisplatin in renal cancer cells.
Collapse
Affiliation(s)
- Ho-Geon Ryu
- College of Oriental Medicine, Kyung Hee University, 1 Hoegi-dong, Dongdaemun-gu, Seoul 130-701, South Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Yu WS, Jeong SJ, Kim JH, Lee HJ, Song HS, Kim MS, Ko E, Lee HJ, Khil JH, Jang HJ, Kim YC, Bae H, Chen CY, Kim SH. The genome-wide expression profile of 1,2,3,4,6-penta-O-galloyl-β-D-glucose-treated MDA-MB-231 breast cancer cells: molecular target on cancer metabolism. Mol Cells 2011; 32:123-32. [PMID: 21614488 PMCID: PMC3887664 DOI: 10.1007/s10059-011-2254-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 03/26/2011] [Accepted: 04/28/2011] [Indexed: 12/27/2022] Open
Abstract
1,2,3,4,6-penta-O-galloyl-beta-D-glucose (PGG), a polyphenolic compound isolated from Rhus chinensis Mill. PGG has been known to have anti-tumor, anti-angiogenic and anti-diabetic activities. The present study revealed another underlying molecular target of PGG in MDA-MB-231 breast cancer cells by using Illumina Human Ref-8 expression BeadChip assay. Through the Beadstudio v3 micro assay program to compare the identified genes expressed in PGG-treated MDA-MB-231 cells with untreated control, we found several unique genes that are closely associated with pyruvate metabolism, glycolysis/gluconeogenesis and tyrosine metabolism, including PC, ACSS2, ACACA, ACYP2, ALDH3B1, FBP1, PRMT2 and COMT. Consistent with microarray data, real-time RT-PCR confirmed the significant down-regulation of these genes at mRNA level in PGG-treated MDA-MB-231 cells. Our findings suggest the potential of PGG as anticancer agent for breast cancer cells by targeting cancer metabolism genes.
Collapse
Affiliation(s)
- Woo Sik Yu
- Cancer Preventive Material Development Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
- These authors contributed equally to this work
| | - Soo-Jin Jeong
- Cancer Preventive Material Development Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
- These authors contributed equally to this work
| | - Ji-Hyun Kim
- Cancer Preventive Material Development Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
| | - Hyo-Jung Lee
- Cancer Preventive Material Development Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
| | - Hyo Sook Song
- Cancer Preventive Material Development Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
| | - Min-Seok Kim
- College of Dental Medicine, Tufts University, Boston, USA
| | - Eunjung Ko
- Cancer Preventive Material Development Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
| | - Hyo-Jeong Lee
- Cancer Preventive Material Development Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
| | - Jae-Ho Khil
- College of Physical Education, Kyung Hee University, Seoul 130-701, Korea
| | - Hyeung-Jin Jang
- Cancer Preventive Material Development Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
| | - Young Chul Kim
- Cancer Preventive Material Development Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
| | - Hyunsu Bae
- Cancer Preventive Material Development Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
| | - Chang Yan Chen
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, USA
| | - Sung-Hoon Kim
- Cancer Preventive Material Development Research Center, College of Oriental Medicine, Kyung Hee University, Seoul 130-701, Korea
| |
Collapse
|
18
|
Buyukleyla M, Azirak S, Rencuzogullari E, Kocaman AY, Ila HB, Topaktas M, Darici C. The genotoxic and antigenotoxic effects of tannic acid in human lymphocytes. Drug Chem Toxicol 2011; 35:11-9. [DOI: 10.3109/01480545.2011.564181] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
19
|
Djakpo O, Yao W. Rhus chinensis and Galla Chinensis--folklore to modern evidence: review. Phytother Res 2010; 24:1739-47. [PMID: 20564459 PMCID: PMC7167973 DOI: 10.1002/ptr.3215] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Revised: 03/29/2010] [Accepted: 04/11/2010] [Indexed: 11/10/2022]
Abstract
The species Rhus chinensis Mill. (Anacardiaceae) is an important representative of the genus Rhus, which contains over 250 individual species found in temperate and tropical regions worldwide. Rhus chinensis has long been used by folk medicine practitioners in Asia. Leaves, roots, stem, bark, fruit and particularly the galls on Rhus chinensis leaves, Galla chinensis, are recognized to have preventative and therapeutic effects on different ailments (such as diarrhea, dysentery, rectal and intestinal cancer, diabetes mellitus, sepsis, oral diseases and inflammation). However, it is critical to separate evidence from anecdote. Fortunately, recent scientific research has revealed that Rhus chinensis compounds possess strong antiviral, antibacterial, anticancer, hepatoprotective, antidiarrheal and antioxidant activities. Moreover, compounds isolated from the stem of Rhus chinensis significantly suppressed HIV-1 activity in vitro. Compounds from this plant were also found to inhibit enamel demineralization in vitro and enhance remineralization of dental enamel with fluoride. This review highlights claims from traditional and tribal medicinal lore and makes a contemporary summary of phytochemical, biological and pharmacological findings on this plant material. It aims to show that the pharmaceutical potential of this plant deserves closer attention.
Collapse
Affiliation(s)
- Odilon Djakpo
- School of Food Science and Technology, Jiangnan University, Food Safety and Quality Control Laboratory, Wuxi, 214122, Jiangsu Province, P.R. China.
| | | |
Collapse
|
20
|
Cheng AC, Lee MF, Tsai ML, Lai CS, Lee JH, Ho CT, Pan MH. Rosmanol potently induces apoptosis through both the mitochondrial apoptotic pathway and death receptor pathway in human colon adenocarcinoma COLO 205 cells. Food Chem Toxicol 2010; 49:485-93. [PMID: 21112365 DOI: 10.1016/j.fct.2010.11.030] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2010] [Revised: 11/03/2010] [Accepted: 11/20/2010] [Indexed: 02/03/2023]
Abstract
Rosemary (Rosmarinus officinalis), a culinary spice and medicinal herb, has been widely used in European folk medicine to treat numerous ailments. Many studies have shown that rosemary extracts play important roles in anti-inflammation, anti-tumor, and anti-proliferation in various in vitro and in vivo settings. The roles of tumor suppression of rosemary have been attributed to the major components, including carnosic acid, carnosol, and rosmarinic acid, rosmanol, and ursolic acid. This study was to explore the effect of rosmanol on the growth of COLO 205 human colorectal adenocarcinoma cells and to delineate the underlying mechanisms. When treated with 50 μM of rosmanol for 24h, COLO 205 cells displayed a strong apoptosis-inducing response with a 51% apoptotic ratio (IC(50) ∼42 μM). Rosmanol increased the expression of Fas and FasL, led to the cleavage and activation of pro-caspase-8 and Bid, and mobilized Bax from cytosol into mitochondria. The mutual activation between tBid and Bad decreased the mitochondrial membrane potential and released cytochrome c and apoptosis-inducing factor (AIF) to cytosol. In turn, cytochrome c induced the processing of pro-caspase-9 and pro-caspase-3, followed by the cleavage of poly-(ADP-ribose) polymerase (PARP) and DNA fragmentation factor (DFF-45). These results demonstrate that the rosmanol-induced apoptosis in COLO 205 cells is involvement of caspase activation and involving complicated regulation of both the mitochondrial apoptotic pathway and death receptor pathway.
Collapse
Affiliation(s)
- An-Chin Cheng
- Department of Nutrition and Health Sciences, Chang Jung Christian University, Tainan, Taiwan.
| | | | | | | | | | | | | |
Collapse
|
21
|
Chai Y, Lee HJ, Shaik AA, Nkhata K, Xing C, Zhang J, Jeong SJ, Kim SH, Lu J. Penta-O-galloyl-beta-D-glucose induces G1 arrest and DNA replicative S-phase arrest independently of cyclin-dependent kinase inhibitor 1A, cyclin-dependent kinase inhibitor 1B and P53 in human breast cancer cells and is orally active against triple negative xenograft growth. Breast Cancer Res 2010; 12:R67. [PMID: 20809980 PMCID: PMC3096953 DOI: 10.1186/bcr2634] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2010] [Accepted: 09/01/2010] [Indexed: 11/23/2022] Open
Abstract
Introduction Natural herbal compounds with novel actions different from existing breast cancer (BCa) treatment modalities are attractive for improving therapeutic efficacy and safety. We have recently shown that penta-1,2,3,4,6-O-galloyl-β-D-glucose (PGG) induced S-phase arrest in prostate cancer (PCa) cells through inhibiting DNA replicative synthesis and G1 arrest, in addition to inducing cell death at higher levels of exposure. We and others have shown that PGG through intraperitoneal (i.p.) injection exerts a strong in vivo growth suppression of human PCa xenograft models in athymic nude mice. This study aims to test the hypothesis that the novel targeting actions of PGG are applicable to BCa cells, especially those lacking proven drugable targets. Methods Mono-layer cell culture models of p53-wild type estrogen receptor (ER)-dependent MCF-7 BCa cells and p53-mutant ER-/progesterone receptor (PR)- and Her2-regular (triple-negative) MDA-MB-231 BCa were exposed to PGG for a comprehensive investigation of cellular consequences and molecular targets/mediators. To test the in vivo efficacy, female athymic mice inoculated with MDA-MB-231 xenograft were treated with 20 mg PGG/kg body weight by daily gavage starting 4 days after cancer cell inoculation. Results Exposure to PGG induced S-phase arrest in both cell lines as indicated by the lack of 5-bromo2'-deoxy-uridine (BrdU) incorporation into S-phase cells as well as G1 arrest. Higher levels of PGG induced more caspase-mediated apoptosis in MCF-7, in strong association with induction of P53 Ser15 phosphorylation, than in MDA-MB-231 cells. The cell cycle arrests were achieved without an induction of cyclin dependent kinase (CDK) inhibitory proteins P21Cip1 and P27Kip1. PGG treatment led to decreased cyclin D1 in both cell lines and over-expressing cyclin D1 attenuated G1 arrest and hastened S arrest. In serum-starvation synchronized MCF-7 cells, down-regulation of cyclin D1 was associated with de-phosphorylation of retinoblastoma (Rb) protein by PGG shortly before G1-S transition. In vivo, oral administration of PGG led to a greater than 60% inhibition of MDA-MB231 xenograft growth without adverse effect on host body weight. Conclusions Our in vitro and in vivo data support PGG as a potential drug candidate for breast cancer with novel targeting actions, especially for a triple negative BCa xenograft model.
Collapse
Affiliation(s)
- Yubo Chai
- The Hormel Institute, University of Minnesota, Austin, MN 55912, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Shieh PC, Chen YO, Kuo DH, Chen FA, Tsai ML, Chang IS, Wu H, Sang S, Ho CT, Pan MH. Induction of apoptosis by [8]-shogaol via reactive oxygen species generation, glutathione depletion, and caspase activation in human leukemia cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:3847-54. [PMID: 20163181 PMCID: PMC2990500 DOI: 10.1021/jf904563c] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Ginger, the rhizome of Zingiber officinale , is a traditional medicine with a carminative effect and antinausea, anti-inflammatory, and anticarcinogenic properties. This study examined the growth inhibitory effects of [8]-shogaol, one of the pungent phenolic compounds in ginger, on human leukemia HL-60 cells. It demonstrated that [8]-shogaol was able to induce apoptosis in a time- and concentration-dependent manner. Treatment with [8]-shogaol caused a rapid loss of mitochondrial transmembrane potential, stimulation of reactive oxygen species (ROS) production, release of mitochondrial cytochrome c into cytosol, and subsequent induction of procaspase-9 and procaspase-3 processing. Taken together, these results suggest for the first time that ROS production and depletion of glutathione that contributed to [8]-shogaol-induced apoptosis in HL-60 cells.
Collapse
Affiliation(s)
- Po-Chuen Shieh
- Department of Pharmacy and Graduate Institute of Pharmaceutical Technology, Tajen University, Pingtung, Taiwan
| | - Yi-Own Chen
- Department of Pharmacy and Graduate Institute of Pharmaceutical Technology, Tajen University, Pingtung, Taiwan
| | - Daih-Huang Kuo
- Department of Pharmacy and Graduate Institute of Pharmaceutical Technology, Tajen University, Pingtung, Taiwan
| | - Fu-An Chen
- Department of Pharmacy and Graduate Institute of Pharmaceutical Technology, Tajen University, Pingtung, Taiwan
| | - Mei-Ling Tsai
- Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901-8520, USA
| | - Ing-Shing Chang
- Department of Seafood Science, National Kaohsiung Marine University, Kaohsiung, Taiwan
| | - Hou Wu
- Department of Seafood Science, National Kaohsiung Marine University, Kaohsiung, Taiwan
| | - Shengmin Sang
- Center of Excellence for Post-harvest Technologies, North Carolina Agricultural and Technical State University, North Carolina Research Campus, 500 Laureate Way, Suite 4222, Kannapolis, NC 28081
| | - Chi-Tang Ho
- Department of Seafood Science, National Kaohsiung Marine University, Kaohsiung, Taiwan
| | - Min-Hsiung Pan
- Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901-8520, USA
| |
Collapse
|
23
|
Zhang J, Li L, Kim SH, Hagerman AE, Lü J. Anti-cancer, anti-diabetic and other pharmacologic and biological activities of penta-galloyl-glucose. Pharm Res 2009; 26:2066-80. [PMID: 19575286 PMCID: PMC2822717 DOI: 10.1007/s11095-009-9932-0] [Citation(s) in RCA: 202] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2009] [Accepted: 06/17/2009] [Indexed: 12/22/2022]
Abstract
1, 2, 3, 4, 6-penta-O-galloyl-beta-D-glucose (PGG) is a polyphenolic compound highly enriched in a number of medicinal herbals. Several in vitro and a handful of in vivo studies have shown that PGG exhibits multiple biological activities which implicate a great potential for PGG in the therapy and prevention of several major diseases including cancer and diabetes. Chemically and functionally, PGG appears to be distinct from its constituent gallic acid or tea polyphenols. For anti-cancer activity, three published in vivo preclinical cancer model studies with PGG support promising efficacy to selectively inhibit malignancy without host toxicity. Potential mechanisms include anti-angiogenesis; anti-proliferative actions through inhibition of DNA replicative synthesis, S-phase arrest, and G(1) arrest; induction of apoptosis; anti-inflammation; and anti-oxidation. Putative molecular targets include p53, Stat3, Cox-2, VEGFR1, AP-1, SP-1, Nrf-2, and MMP-9. For anti-diabetic activity, PGG and analogues appear to improve glucose uptake. However, very little is known about the absorption, pharmacokinetics, and metabolism of PGG, or its toxicity profile. The lack of a large quantity of highly pure PGG has been a bottleneck limiting in vivo validation of cancer preventive and therapeutic efficacies in clinically relevant models.
Collapse
Affiliation(s)
- Jinhui Zhang
- The Hormel Institute, University of Minnesota, 801 16th Avenue NE, Austin, MN 55912, USA
| | - Li Li
- The Hormel Institute, University of Minnesota, 801 16th Avenue NE, Austin, MN 55912, USA
| | - Sung-Hoon Kim
- The Hormel Institute, University of Minnesota, 801 16th Avenue NE, Austin, MN 55912, USA
- Cancer Preventive Material Development Research Center and Institute, College of Oriental Medicine, Kyunghee University, Republic of Korea
| | - Ann E. Hagerman
- Department of Chemistry & Biochemistry, Miami University, Oxford OH 45056
| | - Junxuan Lü
- The Hormel Institute, University of Minnesota, 801 16th Avenue NE, Austin, MN 55912, USA
| |
Collapse
|
24
|
Hu H, Zhang J, Lee HJ, Kim SH, Lü J. Penta-O-galloyl-beta-D-glucose induces S- and G(1)-cell cycle arrests in prostate cancer cells targeting DNA replication and cyclin D1. Carcinogenesis 2009; 30:818-23. [PMID: 19269999 DOI: 10.1093/carcin/bgp059] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We have recently shown that penta-1,2,3,4,6-O-galloyl-beta-D-glucose (PGG), a naturally occurring hydrolyzable gallotannin, inhibited the in vivo growth of human androgen-independent p53-mutant DU145 prostate cancer (PCa) xenograft in athymic nude mice without adverse effect on their body weight. We have also shown that PGG induced caspase-mediated apoptosis in the DU145 cells and the androgen-dependent human p53-wild-type LNCaP cells. Here, we investigated the cell cycle effects of PGG in these and other PCa cells. Our data show that treatment with subapoptotic doses of PGG induced S-arrest, whereas higher doses of PGG induced not only S-arrest but also G(1) arrest. We show, for the first time, that irrespective of the p53 functional status of the PCa cell lines, PGG exerted a rapid (within 2 h) and potent inhibition (inhibitory concentration by 50% approximately 6 microM) of 5-bromo-2'-deoxyuridine incorporation into S phase cells. In isolated nuclei, PGG inhibited DNA replicative synthesis with superior efficacy than a known DNA polymerase alpha inhibitor, aphidocolin. In addition to the S-arrest action, we have found a close association of downregulation of cyclin D1 with G(1) arrest induced by PGG. Overexpressing this G(1) cyclin abolished G(1) arrest, but hastened the S-arrest induction by PGG. Together, our data indicate that PGG induced PCa S-arrest probably through DNA replicative blockage and induced G(1) arrest via cyclin D1 downregulation to contribute to anticancer activity. Our data raise the hypothesis that PGG may be a novel inhibitor of DNA polymerases.
Collapse
Affiliation(s)
- Hongbo Hu
- Hormel Institute, University of Minnesota, 801 16th Avenue NE, Austin, MN 55912, USA
| | | | | | | | | |
Collapse
|
25
|
Chen WJ, Huang YT, Wu ML, Huang TC, Ho CT, Pan MH. Induction of Apoptosis by Vitamin D 2, Ergocalciferol, via Reactive Oxygen Species Generation, Glutathione Depletion, and Caspase Activation in Human Leukemia Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2008; 56:2996-3005. [PMID: 0 DOI: 10.1021/jf0730744] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Affiliation(s)
- Wei-Jen Chen
- Department of Biomedical Sciences, Chung Shan Medical University, No. 110, Section 1, Chien-Kuo N. Road, Taichung 402, Taiwan; Department of Seafood Science, National Kaohsiung Marine University, No. 142, Hai-Chuan Road, Nan-Tzu, Kaohsiung 811, Taiwan; Department of Food Science, National Pingtung University, 912 Pingtung, Taiwan; Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901-8520; and Graduate Institute of Food Science and Technology, National Taiwan University, Taipei,
| | - Yu-Ting Huang
- Department of Biomedical Sciences, Chung Shan Medical University, No. 110, Section 1, Chien-Kuo N. Road, Taichung 402, Taiwan; Department of Seafood Science, National Kaohsiung Marine University, No. 142, Hai-Chuan Road, Nan-Tzu, Kaohsiung 811, Taiwan; Department of Food Science, National Pingtung University, 912 Pingtung, Taiwan; Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901-8520; and Graduate Institute of Food Science and Technology, National Taiwan University, Taipei,
| | - Mei-Li Wu
- Department of Biomedical Sciences, Chung Shan Medical University, No. 110, Section 1, Chien-Kuo N. Road, Taichung 402, Taiwan; Department of Seafood Science, National Kaohsiung Marine University, No. 142, Hai-Chuan Road, Nan-Tzu, Kaohsiung 811, Taiwan; Department of Food Science, National Pingtung University, 912 Pingtung, Taiwan; Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901-8520; and Graduate Institute of Food Science and Technology, National Taiwan University, Taipei,
| | - Tzou-Chi Huang
- Department of Biomedical Sciences, Chung Shan Medical University, No. 110, Section 1, Chien-Kuo N. Road, Taichung 402, Taiwan; Department of Seafood Science, National Kaohsiung Marine University, No. 142, Hai-Chuan Road, Nan-Tzu, Kaohsiung 811, Taiwan; Department of Food Science, National Pingtung University, 912 Pingtung, Taiwan; Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901-8520; and Graduate Institute of Food Science and Technology, National Taiwan University, Taipei,
| | - Chi-Tang Ho
- Department of Biomedical Sciences, Chung Shan Medical University, No. 110, Section 1, Chien-Kuo N. Road, Taichung 402, Taiwan; Department of Seafood Science, National Kaohsiung Marine University, No. 142, Hai-Chuan Road, Nan-Tzu, Kaohsiung 811, Taiwan; Department of Food Science, National Pingtung University, 912 Pingtung, Taiwan; Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901-8520; and Graduate Institute of Food Science and Technology, National Taiwan University, Taipei,
| | - Min-Hsiung Pan
- Department of Biomedical Sciences, Chung Shan Medical University, No. 110, Section 1, Chien-Kuo N. Road, Taichung 402, Taiwan; Department of Seafood Science, National Kaohsiung Marine University, No. 142, Hai-Chuan Road, Nan-Tzu, Kaohsiung 811, Taiwan; Department of Food Science, National Pingtung University, 912 Pingtung, Taiwan; Department of Food Science, Rutgers University, New Brunswick, New Jersey 08901-8520; and Graduate Institute of Food Science and Technology, National Taiwan University, Taipei,
| |
Collapse
|
26
|
Pan MH, Hsieh MC, Kuo JM, Lai CS, Wu H, Sang S, Ho CT. 6-Shogaol induces apoptosis in human colorectal carcinoma cells via ROS production, caspase activation, and GADD 153 expression. Mol Nutr Food Res 2008; 52:527-37. [PMID: 18384088 DOI: 10.1002/mnfr.200700157] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Ginger, the rhizome of Zingiber officinale, is a traditional medicine with anti-inflammatory and anticarcinogenic properties. This study examined the growth inhibitory effects of the structurally related compounds 6-gingerol and 6-shogaol on human cancer cells. 6-Shogaol [1-(4-hydroxy-3-methoxyphenyl)-4-decen-3-one] inhibits the growth of human cancer cells and induces apoptosis in COLO 205 cells through modulation of mitochondrial functions regulated by reactive oxygen species (ROS). ROS generation occurs in the early stages of 6-shogaol-induced apoptosis, preceding cytochrome c release, caspase activation, and DNA fragmentation. Up-regulation of Bax, Fas, and FasL, as well as down-regulation of Bcl-2 and Bcl-X(L )were observed in 6-shogaol-treated COLO 205 cells. N-acetylcysteine (NAC), but not by other antioxidants, suppress 6-shogaol-induced apoptosis. The growth arrest and DNA damage (GADD)-inducible transcription factor 153 (GADD153) mRNA and protein is markedly induced in a time- and concentration-dependent manner in response to 6-shogaol.
Collapse
Affiliation(s)
- Min-Hsiung Pan
- Department of Seafood Science, National Kaohsiung Marine University, Kaohsiung, Taiwan.
| | | | | | | | | | | | | |
Collapse
|
27
|
Pan MH, Gao JH, Lai CS, Wang YJ, Chen WM, Lo CY, Wang M, Dushenkov S, Ho CT. Antitumor activity of 3,5,4′-trimethoxystilbene in COLO 205 cells and xenografts in SCID mice. Mol Carcinog 2008; 47:184-96. [DOI: 10.1002/mc.20352] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
28
|
Pan MH, Chang YH, Badmaev V, Nagabhushanam K, Ho CT. Pterostilbene induces apoptosis and cell cycle arrest in human gastric carcinoma cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:7777-85. [PMID: 17696482 DOI: 10.1021/jf071520h] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Pterostilbene, an active constituent of blueberries, is known to possess anti-inflammatory activity and also induces apoptosis in various types of cancer cells. Here, the effects of pterostilbene on cell viability in human gastric carcinoma AGS cells were investigated. This study demonstrated that pterostilbene was able to inhibit cell proliferation and induce apoptosis in a concentration- and time-dependent manner. Pterostilbene-induced cell death was characterized with changes in nuclear morphology, DNA fragmentation, and cell morphology. The molecular mechanism of pterostilbene-induced apoptosis was also investigated. The results show the caspase-2, -3, -8, and -9 are all activated by pterostilbene, together with cleavage of the downstream caspase-3 target DNA fragmentation factor (DFF-45) and poly(ADP-riobse) polymerase. Moreover, the results indicate that the Bcl-family of proteins, the mitochondrial pathway, and activation of the caspase cascade are responsible for pterostilbene-induced apoptosis. Pterostilbene markedly enhanced the expression of growth arrest DNA damage-inducible gene 45 and 153 (GADD45 and GADD153) in a time-dependent manner. Flow cytometric analysis indicated that pterostilbene blocked cell cycle progression at G1 phase in a dose- and time-dependent manner. Pterostilbene increased the p53, p21, p27, and p16 proteins and decreased levels of cyclin A, cyclin E, cyclin-dependent kinase 2 (Cdk2), Cdk4, and Cdk6, but the expression of cyclin D1 was not affected. Over a 24 h exposure to pterostilbene, the degree of phosphorylation of Rb was decreased after 6 h. In summary, pterostilbene induced apoptosis in AGS cells through activating the caspase cascade via the mitochondrial and Fas/FasL pathway, GADD expression, and by modifying cell cycle progress and changes in several cycle-regulating proteins. The induction of apoptosis by pterostilbene may provide a pivotal mechanism of the antitumor effects and for treatment of human gastric cancer.
Collapse
Affiliation(s)
- Min-Hsiung Pan
- Department of Seafood Science, National Kaohsiung Marine University, Kaohsiung 811, Taiwan.
| | | | | | | | | |
Collapse
|
29
|
Cheng AC, Jian CB, Huang YT, Lai CS, Hsu PC, Pan MH. Induction of apoptosis by Uncaria tomentosa through reactive oxygen species production, cytochrome c release, and caspases activation in human leukemia cells. Food Chem Toxicol 2007; 45:2206-18. [PMID: 17619071 DOI: 10.1016/j.fct.2007.05.016] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2006] [Revised: 04/12/2007] [Accepted: 05/17/2007] [Indexed: 12/01/2022]
Abstract
Uncaria tomentosa (Wild.) DC., found in the Amazon rain forest in South-America and known commonly as cat's claw, has been used in traditional medicine to prevent and treat inflammation and cancer. Recently, it has been found to possess potent anti-inflammation activities. In this study, we extracted cat's claw using four different solvents of different polarities and compared their relative influence on proliferation in human premyelocytic leukemia HL-60 cell lines. Cat's claw n-hexane extracts (CC-H), ethyl acetate extracts (CC-EA) and n-butanol extracts (CC-B) had a greater anti-cancer effect on HL-60 cells than those extracted with methanol (CC-M). Furthermore, CC-EA induced DNA fragmentation in HL-60 cells in a clearly more a concentration- and time-dependent manner than the other extracts. CC-EA-induced cell death was characterized by cell body shrinkage and chromatin condensation. Further investigating the molecular mechanism behind CC-EA-induced apoptosis, sells treated with CC-EA underwent a rapid loss of mitochondrial transmembrane (DeltaPsi(m)) potential, stimulation of phosphatidylserine flip-flop, release of mitochondrial cytochrome c into cytosol, induction of caspase-3 activity in a time-dependent manner, and induced the cleavage of DNA fragmentation factor (DFF-45) and PARP poly-(ADP-ribose) polymerase (PARP). CC-EA promoted the up-regulation of Fas before the processing and activation of procaspase-8 and cleavage of Bid. In addition, the apoptosis induced by CC-EA was accompanied by up-regulation of Bax, down-regulation of Bcl-X(L) and cleavage of Mcl-1, suggesting that CC-EA may have some compounds that have anti-cancer activities and that further studies using cat's claw extracts need to be pursued. Taken together, the results of our studies show clearly that CC-EA's induction of apoptosis in HL-60 cells may make it very important in the development of medicine that can trigger chemopreventive actions in the body.
Collapse
Affiliation(s)
- An-Chin Cheng
- Department of Nutrition and Health Science, Toko University, Chia-Yi County 613, Taiwan
| | | | | | | | | | | |
Collapse
|
30
|
Zhao WH, Gao CC, Ma XF, Bai XY, Zhang YX. The isolation of 1,2,3,4,6-penta-O-galloyl-beta-d-glucose from Acer truncatum Bunge by high-speed counter-current chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2007; 850:523-7. [PMID: 17141590 DOI: 10.1016/j.jchromb.2006.11.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2006] [Revised: 10/30/2006] [Accepted: 11/04/2006] [Indexed: 11/26/2022]
Abstract
High-speed counter-current chromatography (HSCCC) was successfully used for the isolation and purification of 1,2,3,4,6-penta-O-galloyl-beta-D-glucose from the ethyl acetate extract of the leaves of Acer truncatum Bunge using a two-phase system composed of n-hexane-ethyl acetate-methanol-water at a volume ratio of (0.25:5:1:5, v/v/v/v) for the first time. Each injection of 80 mg crude extract yielded 7.25 mg of pure 1,2,3,4,6-penta-O-galloyl-beta-D-glucose. High-performance liquid chromatography (HPLC) analyses of the CCC fraction revealed that the purity of 1,2,3,4,6-penta-O-galloyl-beta-D- glucose was over 95%.
Collapse
Affiliation(s)
- Wen-Hua Zhao
- Department of Chemical Biology, Capital Medical University, Beijing 100069, China
| | | | | | | | | |
Collapse
|
31
|
Huang TC, Fu HY, Ho CT, Tan D, Huang YT, Pan MH. Induction of apoptosis by cinnamaldehyde from indigenous cinnamon Cinnamomum osmophloeum Kaneh through reactive oxygen species production, glutathione depletion, and caspase activation in human leukemia K562 cells. Food Chem 2007. [DOI: 10.1016/j.foodchem.2006.08.018] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
32
|
Hua KT, Way TD, Lin JK. Pentagalloylglucose inhibits estrogen receptor alpha by lysosome-dependent depletion and modulates ErbB/PI3K/Akt pathway in human breast cancer MCF-7 cells. Mol Carcinog 2006; 45:551-60. [PMID: 16637063 DOI: 10.1002/mc.20226] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Estrogens and estrogen receptors (ER) play important roles in estrogen-dependent and ER-positive breast cancer development. Inhibitors against estrogen biosynthesis or anti-estrogens have been used in breast cancer treatment for many years. The aim of this study was to determine whether pentagalloylglucose (5GG) has inhibitory effects on ER function. In the present study, we found that 5GG significantly reduced the growth of estrogen-responsive human breast cancer MCF-7 cells, and suppressed the phosphorylation and protein level of estrogen receptor alpha (ERalpha). Interestingly, 5GG decreased ERalpha protein levels by promoting the degradation of ERalpha protein in the lysosome. The ERalpha can be activated through a ligand-dependent and/or a ligand-independent pathway. The activated Akt kinase was shown to directly phosphorylate ERalpha at its serine residues and cause ligand independent activation. Our results showed that 5GG might inhibit the phosphatidylinositol 3-kinase (PI3K)/Akt pathway either through directly inhibiting Akt kinase activity or through inhibiting phosphorylation of the upstream receptor tyrosine kinases. The depletion of ErbB family receptors, including epidermal growth factor receptor (EGFR), ErbB2, and ErbB3, was also observed. 5GG treatment also led to a dose-dependent decrease in the expression of the estrogen-activated cyclin D1 expression. These findings suggested that 5GG might be a useful chemopreventive or therapeutic agent for hormone-dependent breast cancer through suppressing the functions of ERalpha by lysosome-dependent depletion and modulating the ErbB/PI3K/Akt pathway.
Collapse
Affiliation(s)
- Kuo-Tai Hua
- Institute of Biochemistry and Molecular Biology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | | | | |
Collapse
|
33
|
Pan MH, Huang YT, Ho CT, Chang CI, Hsu PC, Sun Pan B. Induction of apoptosis by Meretrix lusoria through reactive oxygen species production, glutathione depletion, and caspase activation in human leukemia cells. Life Sci 2006; 79:1140-52. [PMID: 16730358 DOI: 10.1016/j.lfs.2006.03.049] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2005] [Revised: 03/13/2006] [Accepted: 03/13/2006] [Indexed: 11/18/2022]
Abstract
Apoptosis-induced directed fractionation and purification was used to identify the bioactive components of hard clams (HC), Meretrix lusoria. Two stereoisomers of epidioxysterol were previously identified as the active compounds in the ethyl acetate fraction (HC-EA). The molecular mechanism of HC-EA-induced apoptosis was also investigated in this study. Dissipation of mitochondrial membrane potential, release of mitochondrial cytochrome c into cytosol, and subsequent induction of pro-caspase-9 and -3 processing preceded apoptosis in HL-60 cells, confirmed by DNA fragmentation, chromatin condensation, changes in the cell membrane and the appearance of a sub-G1 DNA peak. Furthermore, treatment with HC-EA caused a rapid loss of intracellular glutathione content and stimulation of reactive oxygen species (ROS). Antioxidants such as catalase, N-acetylcysteine, pyrrolidine dithiocarbamate, and superoxide dismutase, but not allopurinol and diphenylene iodonium, significantly inhibited HC-EA-induced cell death. Apoptosis was completely prevented by a pan-caspase inhibitor, z-Val-Ala-Asp-fluoromethyl ketone (z-VAD-FMK). The induction of apoptosis by M. lusoria may prove to be a pivotal mechanism for its cancer chemopreventive action.
Collapse
Affiliation(s)
- Min-Hsiung Pan
- Department of Seafood Science, National Kaohsiung Marine University, No. 142, Hai-Chuan Rd, Nan-Tzu, Kaohsiung, Taiwan.
| | | | | | | | | | | |
Collapse
|
34
|
Huang YT, Huang YH, Hour TC, Pan BS, Liu YC, Pan MH. Apoptosis-inducing active components from Corbicula fluminea through activation of caspase-2 and production of reactive oxygen species in human leukemia HL-60 cells. Food Chem Toxicol 2006; 44:1261-72. [PMID: 16545898 DOI: 10.1016/j.fct.2006.02.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2005] [Revised: 01/30/2006] [Accepted: 02/01/2006] [Indexed: 11/22/2022]
Abstract
The anti-cancer effects and possible mechanisms of the freshwater clam (Corbicula fluminea Muller) and its active compounds (FME) on cell viability in human leukemia HL-60 cells were investigated. This study demonstrated that FME was able to inhibit cell proliferation in a concentration- and time-dependent manner. Treatment with FME caused induction of caspase-2, caspase-3, caspase-6, caspase-8, and caspase-9 activity in a time-dependent manner, but not affect caspase-1 activity; it induced the proteolysis of DNA fragmentation factor (DFF-45) and poly(ADP-ribose) polymerase (PARP). Induction of cell death by FME was completely prevented by a pan-caspase inhibitor, Z-Val-Ala-Asp-fluoromethyl ketone (Z-VAD-FMK) and a caspase-2 inhibitor, Z-Val-Asp-Val-Ala-Asp-FMK (Z-VDVAD-FMK). Furthermore, treatment with FME caused a rapid loss of mitochondrial transmembrane potential, stimulation of generation of reactive oxygen species (ROS), release of mitochondrial cytochrome c into cytosol, and GSH depletion. Anti-oxidants such as N-acetylcysteine, catalase, superoxide dismutase, allopurinol, and pyrrolidine dithiocarbamate, but not diphenylene iodonium, significantly inhibited FME-induced cell death. In addition, the results showed that FME-induced apoptosis was accompanied by up-regulation of Bax and Bad, and down-regulation of Bcl-2 and Bcl-XL. Taken together, induction of apoptosis on HL-60 cells by FME was mainly associated with ROS production, GSH depletion, mitochondrial dysfunction, and caspase activation.
Collapse
Affiliation(s)
- Ying-Tang Huang
- Department of Marine Biotechnology, National Kaohsiung Marine University, Kaohsiung, Taiwan
| | | | | | | | | | | |
Collapse
|
35
|
Łabieniec M, Gabryelak T. Oxidatively modified proteins and DNA in digestive gland cells of the fresh-water mussel Unio tumidus in the presence of tannic acid and its derivatives. Mutat Res 2006; 603:48-55. [PMID: 16387525 DOI: 10.1016/j.mrgentox.2005.10.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2005] [Revised: 10/05/2005] [Accepted: 10/27/2005] [Indexed: 11/30/2022]
Abstract
The oxidative effect of tannic acid and its two derivatives (ellagic and gallic acid), naturally occurring plant polyphenols, has been studied on digestive gland cells of the fresh-water mussel Unio tumidus. A spectrophotometric method was used to determine the protein thiol groups after incubation of the cells with the polyphenols at concentrations of 1, 15 and 60 microM. The results showed that the oxidative modification of proteins increased in a concentration-dependent manner but no changes were observed at the concentration of 1 microM. The comet assay (single-cell gel electrophoresis assay) with the formamido-pyrimidine glycosylase (FPG) protein was used to assess oxidative DNA base damage. The cells were treated with polyphenols at the concentrations of 30 and 60 microM and post-incubated with FPG. FPG strongly enhanced DNA damage induced by the polyphenols, indicating that N-7 guanine oxidation is responsible for the observed effect. Using the comet assay in combination with proteinase K we were able to demonstrate the presence of DNA-protein cross-links as the probable cause of the decrease in DNA migration. After treatment of the cells with tannic acid and its metabolites at concentrations of 120, 180 and 240 microM, they were post-incubated with proteinase K. After this treatment an increased DNA migration was observed, indicating the presence of DNA-protein cross-links. We have also used a fluorescence method with Hoechst 33258/propidium iodide DNA-binding dyes to study the extent of DNA fragmentation after exposure of the cells to polyphenols at concentrations of 1, 5 and 60 microM. The results demonstrate that the polyphenols can induce apoptosis and necrosis at higher concentrations (5 and 60 microM). All experimental data suggest that tannic, ellagic and gallic acids at concentrations above 1 microM are able to interact with proteins and DNA, which leads to their degradation or changes in their function.
Collapse
Affiliation(s)
- Magdalena Łabieniec
- Institute of Biophysics, Department of General Biophysics, University of Lodz, 12/16 Banacha St., Lodz 90-237, Poland
| | | |
Collapse
|
36
|
Larrosa M, Tomás-Barberán FA, Espín JC. The dietary hydrolysable tannin punicalagin releases ellagic acid that induces apoptosis in human colon adenocarcinoma Caco-2 cells by using the mitochondrial pathway. J Nutr Biochem 2005; 17:611-25. [PMID: 16426830 DOI: 10.1016/j.jnutbio.2005.09.004] [Citation(s) in RCA: 283] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2005] [Revised: 09/06/2005] [Accepted: 09/07/2005] [Indexed: 12/26/2022]
Abstract
Polyphenol-rich dietary foodstuffs have attracted attention due to their cancer chemopreventive and chemotherapeutic properties. Ellagitannins (ETs) belong to the so-called hydrolysable tannins found in strawberries, raspberries, walnuts, pomegranate, oak-aged red wine, etc. Both ETs and their hydrolysis product, ellagic acid (EA), have been reported to induce apoptosis in tumour cells. Ellagitannins are not absorbed in vivo but reach the colon and release EA that is metabolised by the human microflora. Our aim was to investigate the effect of a dietary ET [pomegranate punicalagin (PUNI)] and EA on human colon cancer Caco-2 and colon normal CCD-112CoN cells. Both PUNI and EA provoked the same effects on Caco-2 cells: down-regulation of cyclins A and B1 and upregulation of cyclin E, cell-cycle arrest in S phase, induction of apoptosis via intrinsic pathway (FAS-independent, caspase 8-independent) through bcl-XL down-regulation with mitochondrial release of cytochrome c into the cytosol, activation of initiator caspase 9 and effector caspase 3. Neither EA nor PUNI induced apoptosis in normal colon CCD-112CoN cells (no chromatin condensation and no activation of caspases 3 and 9 were detected). In the case of Caco-2 cells, no specific effect can be attributed to PUNI since it was hydrolysed in the medium to yield EA, which entered into the cells and was metabolised to produce dimethyl-EA derivatives. Our study suggests that the anticarcinogenic effect of dietary ETs could be mainly due to their hydrolysis product, EA, which induced apoptosis via mitochondrial pathway in colon cancer Caco-2 cells but not in normal colon cells.
Collapse
Affiliation(s)
- Mar Larrosa
- Research Group on Quality, Safety and Bioactivity of Plant Foods, Department of Food Science and Technology, Campus de Espinardo, Espinardo, Murcia, Spain
| | | | | |
Collapse
|
37
|
Cheng AC, Huang TC, Lai CS, Pan MH. Induction of apoptosis by luteolin through cleavage of Bcl-2 family in human leukemia HL-60 cells. Eur J Pharmacol 2005; 509:1-10. [PMID: 15713423 DOI: 10.1016/j.ejphar.2004.12.026] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2004] [Revised: 12/07/2004] [Accepted: 12/10/2004] [Indexed: 12/31/2022]
Abstract
In our study, luteolin has shown its apoptosis-inducing potent in HL-60 cells with its 76.5% apoptotic ratio of 100 microM treatment. When HL-60 cells were treated with 60 microM of luteolin, DNA ladders were visible at 6 h and increased from 6-12 h after treatment. Luteolin could decrease the mitochondrial membrane potential, trigger cytochrome c released to cytosol, and subsequently induce the processing of procaspase-9 and procaspase-3, which were followed by the cleavage of poly-(ADP-ribose) polymerase (PARP) and DNA fragmentation factor (DFF-45). The cleavage of the proapoptotic Bcl-2 proteins, such as Bad and Bax to produce their truncated forms, and the cleavage of the antiapoptotic Bcl-2 proteins, such as Bcl-2 and Bcl-XL, into their potent pro-apoptotic fragments were detected in our study. From the results, we suggested that the structure of luteolin contributes to its potent in inducing apoptosis in HL-60 cells, and the mitochondrial pathway might play an important role in the luteolin-induced apoptosis. The induction of apoptosis by luteolin may offer a pivotal mechanism for its cancertherapeutic and chemopreventive action.
Collapse
Affiliation(s)
- An-Chin Cheng
- Department of Food Science, National Pingtung University, 912, Pingtung, Taiwan
| | | | | | | |
Collapse
|
38
|
Chen CN, Wu CL, Lin JK. Propolin C from propolis induces apoptosis through activating caspases, Bid and cytochrome c release in human melanoma cells. Biochem Pharmacol 2004; 67:53-66. [PMID: 14667928 DOI: 10.1016/j.bcp.2003.07.020] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
We had demonstrated that two prenylflavanones, propolin A and propolin B, isolated and characterized from Taiwanese propolis, induced apoptosis in human melanoma cells and significantly inhibited xanthine oxidase activity. Here, we have isolated a third compound called propolin C. The chemical structure of propolin C has been characterized by NMR and HRMS spectra, and was identical to nymphaeol-A. However, no biological activities of this compound have ever been reported. In the present study, propolin C effectively induced a cytotoxic effect on human melanoma cells, with an IC(50) of about 8.5 microM. DNA flow cytometric analysis indicated that propolin C actively induced apoptosis in human melanoma cells and there is a marked loss of cells from the G2/M phase of the cell cycle. To address the mechanism of the apoptosis effect of propolin C, we evaluated the effect of propolin C on induction of apoptosis-related proteins in human melanoma cells. The levels of procaspase-8, Bid, procaspase-3, and poly(ADP-ribose) polymerase were decreased in dose- or time course-dependent manners. Moreover, propolin C was capable of releasing cytochrome c from mitochondria to cytosol. The findings suggest that propolin C may activate a mitochondria-mediated apoptosis pathway. On other hand, propolin C is a potential antioxidant agent and shows a strong capability to scavenge free radicals and inhibit on xanthine oxidase activity with IC(50) of about 17.0microM. In conclusion, the isolation and characterization of propolin C from bee propolis are described for the first time, and this compound is a powerful inducer of apoptosis in human melanoma cells.
Collapse
Affiliation(s)
- Chia-Nan Chen
- Graduate Institute of Biochemistry and Molecular Biology, College of Medicine, National Taiwan University, Section 1, Jen-Ai Road, 100, ROC, Taipei, Taiwan
| | | | | |
Collapse
|
39
|
Chen WJ, Lin JK. Induction of G1 arrest and apoptosis in human jurkat T cells by pentagalloylglucose through inhibiting proteasome activity and elevating p27Kip1, p21Cip1/WAF1, and Bax proteins. J Biol Chem 2004; 279:13496-505. [PMID: 14726525 DOI: 10.1074/jbc.m212390200] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Pentagalloylglucose, which is found in many medicinal plants, can arrest the cell cycle at G(1) phase through down-regulation of cyclin-dependent kinases 2 and 4 and up-regulation of the cyclin-dependent kinase inhibitors p27(Kip1) and p21(Cip1/WAF1) in human breast cancer cells. Pentagalloylglucose also induces apoptosis in human leukemic cells. However, the mechanisms by which pentagalloylglucose induces these effects is unclear. We now show that pentagalloylglucose inhibits the activities of purified 20 and 26 S proteasomes in vitro, the 26 S proteasome in Jurkat T cell lysates, and chymotrypsin-like activity of the 26 S proteasome in intact Jurkat T cells. The turnover of p27(Kip1) and p21(Cip1/WAF1), which is necessary for cell cycle progression mediated by proteasome degradation, was disrupted by treatment of human Jurkat T cells with pentagalloylglucose. This was shown by cycloheximide treatment and in vivo pulse-chase labeling experiments, and this effect correlated with the arrest of proliferation of Jurkat T cells at G(1). Inhibition of the proteasome by pentagalloylglucose and by the proteasome inhibitor MG132 caused accumulation of ubiquitin-tagged proteins in Jurkat T cells. The addition of pentagalloylglucose to Jurkat T cells enhanced the stability of the proteasome substrate Bax and increased cytochrome c release and apoptosis. Our findings suggest a mechanism for the effect of pentagalloylglucose on the cell cycle in human leukemic cells: that pentagalloylglucose down-regulates proteasome-mediated pathways because it is a proteasome inhibitor.
Collapse
Affiliation(s)
- Wei-Jen Chen
- Institute of Biochemistry and Molecular Biology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | | |
Collapse
|
40
|
Lee SJ, Lee IS, Mar W. Inhibition of inducible nitric oxide synthase and cyclooxygenase-2 activity by 1,2,3,4,6-Penta-O-galloyl-β-D-glucose in murine macrophage cells. Arch Pharm Res 2003; 26:832-9. [PMID: 14609132 DOI: 10.1007/bf02980029] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Activated macrophages express inducible isoforms of nitric oxide synthase (iNOS) and cyclooxygenase (COX-2), and produce excessive amounts of nitric oxide (NO) and prostaglandin E2 (PGE2), which play key roles in the processes of inflammation and carcinogenesis. The root of Paeonia lactiflora Pall., and the root cortex of Paeonia suffruticosa Andr., are important Chinese crude drugs used in many traditional prescriptions. 1,2,3,4,6-penta-O-galloyl-beta-D-glucose (PGG) is a major bioactive constituent of both crude drugs. PGG has been shown to possess potent anti-oxidant, anti-mutagenic, anti-proliferative and anti-invasive effects. In this study, we examined the inhibitory effects of 1,2,3,4,6-penta-O-galloyl-beta-D-glucose (PGG) isolated from the root of Paeonia lactiflora Pall. on the COX-2 and iNOS activity in LPS-activated Raw 264.7 cells, COX-1 in HEL cells. To investigate the structure-activity relationships of gallate and gallic acid for the inhibition of iNOS and COX-2 activity, we also examined (-)-epigallocatechin gallate (EGCG), gallic acid, and gallacetophenone. The results of the present study indicated that PGG, EGCG, and gallacetophenone treatment except gallic acid significantly inhibited LPS-induced NO production in LPS-activated macrophages. All of the four compounds significantly inhibited COX-2 activity in LPS-activated macrophages. Among the four compounds examined, PGG revealed the most potent in both iNOS (IC50 approximately 18 microg/mL) and COX-2 inhibitory activity (PGE2: IC50 approximately 8 microg/mL and PGD2: IC50 approximately 12 microg/mL), respectively. Although further studies are needed to elucidate the molecular mechanisms and structure-activity relationship by which PGG exerts its inhibitory actions, our results suggest that PGG might be a candidate for developing anti-inflammatory and cancer chemopreventive agents.
Collapse
Affiliation(s)
- Sung-Jin Lee
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 110-460, Korea
| | | | | |
Collapse
|
41
|
Chen WJ, Chang CY, Lin JK. Induction of G1 phase arrest in MCF human breast cancer cells by pentagalloylglucose through the down-regulation of CDK4 and CDK2 activities and up-regulation of the CDK inhibitors p27(Kip) and p21(Cip). Biochem Pharmacol 2003; 65:1777-85. [PMID: 12781329 DOI: 10.1016/s0006-2952(03)00156-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Pentagalloylglucose (5GG) is a potent and specific inhibitor of NADPH dehydrogenase or xanthine oxidase. In our previous study, we showed that 5GG was able to induce apoptosis in HL-60 cells in a time- and concentration-dependent manner via the activation of caspase-3. Recently, we found that 5GG was capable of perturbing the cell cycle of the human breast cancer cell line MCF-7. DNA flow cytometric analysis showed that 5GG exhibited the ability of blocking MCF-7 cell cycle progression at the G1 phase. The level of several G1 phase-related cyclins and cyclin-dependent kinases did not change in these cells during a 24-hr exposure to 5GG. However, the activity of cyclin E/CDK2 was decreased in a concentration- and time-dependent manner and the activity of cyclin D/CDK4 was inhibited when serum-starved synchronized cells were released from synchronization. p27(Kip) and p21(Cip), inhibitors of cyclin/CDK complexes in G1-phase, were gradually increased after 5GG treatment in a time-dependent manner and the induction of p21(Cip) was correlated with an increase in p53 levels. These results suggest that the suppression of cell-cycle progression in the G1 phase by 5GG was mediated in MCF-7 cells, at least in part, by either the inhibition of cyclin D/CDK4 and cyclin E/CDK2 activity or the induction of the CDK inhibitors p27(Kip) and p21(Cip).
Collapse
Affiliation(s)
- Wei-Jen Chen
- Institute of Biochemistry, College of Medicine, National Taiwan University, No. 1, Section 1, Jen-Ai Road, Taipei, Taiwan, ROC
| | | | | |
Collapse
|
42
|
Ho LL, Chen WJ, Lin-Shiau SY, Lin JK. Penta-O-galloyl-beta-D-glucose inhibits the invasion of mouse melanoma by suppressing metalloproteinase-9 through down-regulation of activator protein-1. Eur J Pharmacol 2002; 453:149-58. [PMID: 12398898 DOI: 10.1016/s0014-2999(02)02340-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Penta-O-galloyl-beta-D-glucose (5GG) inhibited the invasion of highly metastatic mouse melanoma B16F10 cells in vitro, as demonstrated by transwell assay. Its ability to diminish the activity of matrix metalloproteinase (MMP) was demonstrated by zymographic assay. Our data showed 5GG could diminish the activity of MMP-9 more than that of MMP-2. The effect on MMP-9 was elicited in a dose- and time-dependent manner, with IC50 of 15 microM. Next, we analyzed the amounts of MMP-9 and MMP-2 protein in conditioned media and in the cells. The data indicated MMP-9 proteins were also suppressed by 5GG in the same manner. In accordance with these data above, the results of reverse transcriptase polymerase chain reaction (RT-PCR) and Northern blot analysis showed a reduced level of MMP-9 mRNA. Furthermore, we studied transcription factor binding to MMP-2 and MMP-9 promoter regions by electrophoretic mobility shift assay (EMSA) in the nucleus. The results suggested that the transcription factor binding activities of Activator protein-1 (AP-1) and Sp-1 sites was mainly down-regulated by 5GG in the concentration range of 5-15 microM, but not that of nuclear factor kappaB (NF-kappaB), polioma enhancer activator 3 (PEA-3), and Activator protein-2 (AP-2) sites. The Western blot analysis of AP-1 nuclear protein showed a reduced level of c-Jun but not of c-Fos. In addition, the expression of Sp-1 and c-Jun protein was also suppressed. To elucidate whether the transcriptional activity of AP-1 or Sp-1 sites is more important, we transfected MMP-9/luciferase reporter vector, under MMP-9 promoter control, into the cells. We found that a decreased transcriptional activity of AP-1 sites is sufficient to reduce MMP-9 promoter activity. These results lead us to conclude that 5GG restricts the invasive ability of B16F10 mouse melanoma cells by reducing MMP-9 activity, by suppressing the transcriptional activity of AP-1 sites and the expression of c-Jun protein. The result may provide a potential mechanism for 5GG in cancer chemopreventive action.
Collapse
Affiliation(s)
- Li-Lun Ho
- Institute of Biochemistry, College of Medicine, National Taiwan University, No. 1, Section 1, Jen-Ai Road, Taipei, Taiwan
| | | | | | | |
Collapse
|
43
|
Seo WG, Pae HO, Oh GS, Chai KY, Yun YG, Chung HT, Jang KK, Kwon TO. Ethyl acetate extract of the stem bark of Cudrania tricuspidata induces apoptosis in human leukemia HL-60 cells. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2002; 29:313-20. [PMID: 11527073 DOI: 10.1142/s0192415x01000332] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Apoptosis is now widely accepted as playing a role in tumorigenesis. An effective compound which can kill tumors via apoptotic pathway appears to be a relevant strategy to suppress various human tumors. The ethyl acetate extract from the stem bark of Cudrania tricuspidata (EACT) showed dose- and time-dependent cytotoxic effects on human leukemia HL-60 cells. DNA fragmentation and morphological changes, accompanied by condensed and fragmented nuclei, were observed in the cells cultured for 6 hr with EACT. These results suggest that the cytotoxicity of the crude extract from Cudrania tricuspidata against HL-60 cells is due to apoptosis.
Collapse
Affiliation(s)
- W G Seo
- Department of Microbiology and Immunology, Wonkwang University School of Medicine, Iksan, Chonbuk, South Korea
| | | | | | | | | | | | | | | |
Collapse
|
44
|
Abstract
Gordonia axillaris (Roxb.) Dietrich (Theaceae) is a native to Taiwan and the leaves have been used as an astringent folk medicine. Camelliin B (CB), a macrocyclic hydrolyzable tannin, was isolated from G. axillaris and showed cytotoxic effects in human carcinoma cells. Among the target cells (SKHep-1, Ha-22T, DU-145, AGS, and HeLa), the cervical carcinoma cell line, HeLa, was more sensitive to CB than were Chang normal liver cells and primary-cultured normal gingival and cervical fibroblasts. Furthermore, the cytotoxic effects of CB showed dose-dependency at 3.2-100.0 microg/ml in HeLa for 1,24,48, and 72 h and with an IC(50) value of 46.3 microg/ml for 48 h. However, the IC(50) value of CB in primary-cultured normal cervical fibroblasts was 108.0 microg/ml. Therefore, the selectivity shown by CB was ascribed to the difference in growth speed between normal and tumor cells. HeLa cells and primary-cultured normal cervical fibroblasts were treated with 50.0 and 100.0 microg/ml CB for 48 h, respectively, and exhibited chromatin condensation, indicating the occurrence of apoptosis. Flow cytometric analysis demonstrated the presence of apoptotic cells with low DNA content, a decrease of cell population at the G(1) phase, and a concomitant increase of cell population at the G(2)/M phase. CB also caused DNA fragmentation and inhibited PARP degradation in HeLa cells. However, CB did not significantly inhibit Bcl-2 expression in HeLa cells at 50.0 microg/ml, only at 100.0 microg/ml for 48 h. These results suggest that CB induced apoptosis, without direct inhibition of Bcl-2 expression in HeLa cells.
Collapse
Affiliation(s)
- C C Wang
- Graduate Institute of Pharmacognosy Science, Taipei Medical University, 250 Wu-Hsing Street, Taipei 110, Taiwan, ROC
| | | | | |
Collapse
|
45
|
Bors W, Michel C, Stettmaier K. Structure-activity relationships governing antioxidant capacities of plant polyphenols. Methods Enzymol 2001; 335:166-80. [PMID: 11400366 DOI: 10.1016/s0076-6879(01)35241-2] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- W Bors
- Institut für Strahlenbiologie, GSF Forschungszentrum für Umwelt und Gesundheit, Neuherberg D-85764, Germany
| | | | | |
Collapse
|
46
|
Islam S, Islam N, Kermode T, Johnstone B, Mukhtar H, Moskowitz RW, Goldberg VM, Malemud CJ, Haqqi TM. Involvement of caspase-3 in epigallocatechin-3-gallate-mediated apoptosis of human chondrosarcoma cells. Biochem Biophys Res Commun 2000; 270:793-7. [PMID: 10772904 DOI: 10.1006/bbrc.2000.2536] [Citation(s) in RCA: 90] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Green tea polyphenol-(-)epigallocatechin-3-gallate (EGCG)-is a potent chemopreventive agent in many test systems and has been shown to inhibit tumor promotion and induce apoptosis. In this study we describe a novel observation that EGCG displayed strong inhibitory effects on the proliferation and viability of HTB-94 human chondrosarcoma cells in a dose-dependent manner and induced apoptosis. Investigation of the mechanism of EGCG-induced apoptosis revealed that treatment with EGCG resulted in DNA fragmentation, induction of caspase-3/CPP32 activity, and cleavage of the death substrate poly(ADP-ribose)polymerase (PARP). Pretreatment of cells with a synthetic pan-caspase inhibitor (Z-VAD-FMK) and a caspase-3-specific inhibitor (DEVD-CHO) prevented EGCG-induced PARP cleavage. The induction of apoptosis by EGCG via activation of caspase-3/CPP32-like proteases may provide a mechanistic explanation for its antitumor effects.
Collapse
Affiliation(s)
- S Islam
- Department of Medicine, Case Western Reserve University, 10900 Euclid Avenue, Cleveland Ohio 44106, USA
| | | | | | | | | | | | | | | | | |
Collapse
|