1
|
Wu X, Smet E, Brandi F, Raikwar D, Zhang Z, Maes BUW, Sels BF. Advancements and Perspectives toward Lignin Valorization via O-Demethylation. Angew Chem Int Ed Engl 2024; 63:e202317257. [PMID: 38128012 DOI: 10.1002/anie.202317257] [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: 11/13/2023] [Revised: 12/20/2023] [Accepted: 12/21/2023] [Indexed: 12/23/2023]
Abstract
Lignin represents the largest aromatic carbon resource in plants, holding significant promise as a renewable feedstock for bioaromatics and other cyclic hydrocarbons in the context of the circular bioeconomy. However, the methoxy groups of aryl methyl ethers, abundantly found in technical lignins and lignin-derived chemicals, limit their pertinent chemical reactivity and broader applicability. Unlocking the phenolic hydroxyl functionality through O-demethylation (ODM) has emerged as a valuable approach to mitigate this need and enables further applications. In this review, we provide a comprehensive summary of the progress in the valorization of technical lignin and lignin-derived chemicals via ODM, both catalytic and non-catalytic reactions. Furthermore, a detailed analysis of the properties and potential applications of the O-demethylated products is presented, accompanied by a systematic overview of available ODM reactions. This review primarily focuses on enhancing the phenolic hydroxyl content in lignin-derived species through ODM, showcasing its potential in the catalytic funneling of lignin and value-added applications. A comprehensive synopsis and future outlook are included in the concluding section of this review.
Collapse
Affiliation(s)
- Xian Wu
- Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Ewoud Smet
- Organic Synthesis Division, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Francesco Brandi
- Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Deepak Raikwar
- Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Zhenlei Zhang
- Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Bert U W Maes
- Organic Synthesis Division, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Bert F Sels
- Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| |
Collapse
|
2
|
Diwan P, Nirwan M, Bahuguna M, Kumari SP, Wahlang J, Gupta RK. Evaluating Alterations of the Oral Microbiome and Its Link to Oral Cancer among Betel Quid Chewers: Prospecting Reversal through Probiotic Intervention. Pathogens 2023; 12:996. [PMID: 37623956 PMCID: PMC10459687 DOI: 10.3390/pathogens12080996] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 07/18/2023] [Accepted: 07/25/2023] [Indexed: 08/26/2023] Open
Abstract
Areca nut and slaked lime, with or without tobacco wrapped in Piper betle leaf, prepared as betel quid, is extensively consumed as a masticatory product in many countries across the world. Betel Quid can promote the malignant transformation of oral lesions as well as trigger benign cellular and molecular changes. In the oral cavity, it causes changes at the compositional level in oral microbiota called dysbiosis. This dysbiosis may play an important role in Oral Cancer in betel quid chewers. The abnormal presence and increase of bacteria Fusobacterium nucleatum, Capnocytophaga gingivalis, Prevotella melaninogenica, Peptostreptococcus sp., Porphyromonas gingivalis, and Streptococcus mitis in saliva and/or other oral sites of the cancer patients has attracted frequent attention for its association with oral cancer development. In the present review, the authors have analysed the literature reports to revisit the oncogenic potential of betel quid and oral microbiome alterations, evaluating the potential of oral microbiota both as a driver and biomarker of oral cancer. The authors have also shared a perspective that the restoration of local microbiota can become a potentially therapeutic or prophylactic strategy for the delay or reversal of lip and oral cavity cancers, especially in high-risk population groups.
Collapse
Affiliation(s)
- Prerna Diwan
- Department of Microbiology, Ram Lal Anand College, University of Delhi, New Delhi 110021, India; (M.N.); (M.B.); (S.P.K.); (R.K.G.)
| | - Mohit Nirwan
- Department of Microbiology, Ram Lal Anand College, University of Delhi, New Delhi 110021, India; (M.N.); (M.B.); (S.P.K.); (R.K.G.)
| | - Mayank Bahuguna
- Department of Microbiology, Ram Lal Anand College, University of Delhi, New Delhi 110021, India; (M.N.); (M.B.); (S.P.K.); (R.K.G.)
| | - Shashi Prabha Kumari
- Department of Microbiology, Ram Lal Anand College, University of Delhi, New Delhi 110021, India; (M.N.); (M.B.); (S.P.K.); (R.K.G.)
| | - James Wahlang
- Department of Biochemistry, St. Edmund’s College, Shillong 793003, India;
| | - Rakesh Kumar Gupta
- Department of Microbiology, Ram Lal Anand College, University of Delhi, New Delhi 110021, India; (M.N.); (M.B.); (S.P.K.); (R.K.G.)
| |
Collapse
|
3
|
Sekar V, Ramasamy G, Ravikumar C, Muthurajan R, Uthandi S, Kandasamy R, Ganapati PS. Targeting bone cancer with 4-Allylbenzene-1,2-diol purified from Piper betle L.: an in silico and cytotoxicity scrutiny. J Biomol Struct Dyn 2023; 41:15446-15459. [PMID: 36905677 DOI: 10.1080/07391102.2023.2188952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 03/01/2023] [Indexed: 03/13/2023]
Abstract
Piper betle L., a well-known medicinal plant with rich source of bioactive compounds, is widely used in several therapeutics. The present study was performed to scrutinize the anti-cancer potential of compounds P. betle petiole by means of in silico studies, purification of 4-Allylbenzene-1,2-diol from petioles and assessing its cytotoxicity on bone cancer metastasis. Subsequent to SwissADME screening, 4-Allylbenzene-1,2-diol and Alpha terpineol were chosen for molecular docking together with eighteen approved drugs against fifteen important bone cancer targets accompanied with molecular dynamics simulation studies. 4-Allylbenzene-1,2-diol was found to be multi-targeting, interacted effectively with all targets, particularly exhibited good stability with MMP9 and MMP2 during molecular dynamics simulations and Molecular Mechanics- Generalized Born and Surface Area (MM-GBSA) analysis using Schrodinger. Later, the compound was isolated, purified and the cytotoxicity studies on MG63 bone cancer cell lines confirmed the cytotoxicity nature (75.98% at 100 µg/ml concentration). The results demonstrated the compound as a matrix metalloproteinase inhibitor, and therefore 4-Allylbenzene-1,2-diol may possibly be prescribed in targeted therapy for alleviating the bone cancer metastasis upon further wet lab experimental validations.Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Vinusri Sekar
- Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, TN, India
| | - Gnanam Ramasamy
- Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, TN, India
| | - Caroline Ravikumar
- Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, TN, India
| | - Raveendran Muthurajan
- Centre for Plant Molecular Biology and Biotechnology, Tamil Nadu Agricultural University, Coimbatore, TN, India
| | - Sivakumar Uthandi
- Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, TN, India
| | - Rajamani Kandasamy
- Department of Medicinal and Aromatic crops, Tamil Nadu Agricultural University, Coimbatore, TN, India
| | - Patil Santosh Ganapati
- Department of Physical Sciences and Information Technology, Tamil Nadu Agricultural University, Coimbatore, TN, India
| |
Collapse
|
4
|
Islam MA, Jeong JY, Hossain MS, Tarek H, Khan N, Jamila N, Kim KS. Analysis of Piper betle L. Leaves from Bangladesh for Polyphenolics by Ultrasonic-Assisted Extraction (UAE) and High-Performance Liquid Chromatography (HPLC) Together with the Antioxidant, Antibacterial, and Cytotoxic Activities. ANAL LETT 2023. [DOI: 10.1080/00032719.2023.2186423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Affiliation(s)
- Md Atikul Islam
- Department of Food and Nutrition, Chosun University, Gwangju, Republic of Korea
- Department of Chemistry, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh
| | - Ji Young Jeong
- Department of Food and Nutrition, Chosun University, Gwangju, Republic of Korea
| | - Md Selim Hossain
- Department of Biomedical Science, Chosun University, Gwangju, Republic of Korea
| | - Hasan Tarek
- Department of Pharmacy, Chosun University, Gwangju, Republic of Korea
| | - Naeem Khan
- Department of Chemistry, Kohat University of Science & Technology, Kohat, Pakistan
| | - Nargis Jamila
- Department of Chemistry, Shaheed Benazir Bhutto Women University Peshawar, Peshawar, Pakistan
| | - Kyong Su Kim
- Department of Food and Nutrition, Chosun University, Gwangju, Republic of Korea
| |
Collapse
|
5
|
Mohamad NA, Rahman AA, Sheikh Abdul Kadir SH. Hydroxychavicol as a potential anticancer agent (Review). Oncol Lett 2022; 25:34. [PMID: 36589673 PMCID: PMC9773318 DOI: 10.3892/ol.2022.13620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 11/11/2022] [Indexed: 12/12/2022] Open
Abstract
Piper betle leaves are widely cultivated in Malaysia, India, Indonesia and Thailand. They have been used as a traditional medicine for centuries due to their medicinal properties, including antioxidant, antiproliferative, antibacterial, antifungal and anti-inflammatory properties, which are attributable to their high phenolic contents. Hydroxychavicol (HC), a primary constituent of P. betle leaves, is known to possess antiproliferative activity at micromolar doses on various cancer cell lines of different origins while leaving normal cells unharmed. The present review summarises the mechanisms of action of HC reported in the literature, reviews the scope of work done thus far and outlines the direction of future research on the potential of HC as an anticancer agent. PubMed, Scopus and Web of Science were searched using the keywords (hydroxychavicol OR 4-allylpyrocatechol OR 4-allylcatechol) AND (cancer OR carcinogenesis OR tumour OR carcinoma) to acquire research articles. In vitro studies reported several possible mechanisms for the chemopreventive effects of HC against cancer cell lines, including chronic myelogenous leukaemia (CML), prostate, glioma, breast and colorectal cancers, while in vivo studies encompassed investigations on Ehrlich ascites carcinoma cells in Swiss albino mice and a CML mouse model. These studies suggest that HC exerts its anticancer effect via the modulation of mitochondrial membrane potential and the c-Jun N-terminal kinase, mitogen-activated protein kinase and endoplasmic reticulum-unfolded protein responses pathways and the generation of reactive oxygen species. In summary, future research should focus on combinations of HC with other anticancer drugs and testing in animal models to evaluate its bioavailability, potency and tissue and dose selectivity.
Collapse
Affiliation(s)
- Noor Azleen Mohamad
- Institute of Medical and Molecular Biotechnology, Faculty of Medicine, Universiti Teknologi MARA, Universiti Teknologi MARA, Cawangan Selangor, Kampus Sungai Buloh, Sungai Buloh, Selangor 47000, Malaysia
| | - Amirah Abdul Rahman
- Institute of Medical and Molecular Biotechnology, Faculty of Medicine, Universiti Teknologi MARA, Universiti Teknologi MARA, Cawangan Selangor, Kampus Sungai Buloh, Sungai Buloh, Selangor 47000, Malaysia,Department of Biochemistry and Molecular Medicine, Faculty of Medicine, Universiti Teknologi MARA, Universiti Teknologi MARA, Cawangan Selangor, Kampus Sungai Buloh, Sungai Buloh, Selangor 47000, Malaysia,Correspondence to: Dr Amirah Abdul Rahman, Department of Biochemistry and Molecular Medicine, Faculty of Medicine, Universiti Teknologi MARA, Cawangan Selangor, Kampus Sungai Buloh, Jalan Hospital, Sungai Buloh, Selangor 47000, Malaysia, E-mail:
| | - Siti Hamimah Sheikh Abdul Kadir
- Department of Biochemistry and Molecular Medicine, Faculty of Medicine, Universiti Teknologi MARA, Universiti Teknologi MARA, Cawangan Selangor, Kampus Sungai Buloh, Sungai Buloh, Selangor 47000, Malaysia,Institute of Pathology, Laboratory and Forensic Medicine, Faculty of Medicine, Universiti Teknologi MARA, Universiti Teknologi MARA, Cawangan Selangor, Kampus Sungai Buloh, Sungai Buloh, Selangor 47000, Malaysia
| |
Collapse
|
6
|
Chang MC, Chen NY, Chen JH, Huang WL, Chen CY, Huang CC, Pan YH, Chang HH, Jeng JH. bFGF stimulated plasminogen activation factors, but inhibited alkaline phosphatase and SPARC in stem cells from apical Papilla: Involvement of MEK/ERK, TAK1 and p38 signaling. J Adv Res 2021; 40:95-107. [PMID: 36100336 PMCID: PMC9481946 DOI: 10.1016/j.jare.2021.12.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 12/04/2021] [Accepted: 12/14/2021] [Indexed: 11/25/2022] Open
Abstract
bFGF induced uPA, uPAR, PAI-1 production/expression in SCAP → bFGF induced decline of ALP and SPARC of SCAP → The effects of bFGF are regulated by ERK, p38, TAK1 and Akt signaling → Crucial for SCAP proliferation, matrix turnover and differentiation → These events are important for revascularization/root apexogenesis
Introduction Objectives Methods Results Conclusion
Collapse
|
7
|
Apak R, Calokerinos A, Gorinstein S, Segundo MA, Hibbert DB, Gülçin İ, Demirci Çekiç S, Güçlü K, Özyürek M, Çelik SE, Magalhães LM, Arancibia-Avila P. Methods to evaluate the scavenging activity of antioxidants toward reactive oxygen and nitrogen species (IUPAC Technical Report). PURE APPL CHEM 2021. [DOI: 10.1515/pac-2020-0902] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Abstract
This project was aimed to identify the quenching chemistry of biologically important reactive oxygen and nitrogen species (ROS/RNS, including radicals), to show antioxidant action against reactive species through H‐atom and electron transfer reactions, and to evaluate the ROS/RNS scavenging activity of antioxidants with existing analytical methods while emphasizing the underlying chemical principles and advantages/disadvantages of these methods. In this report, we focused on the applications and impact of existing assays on potentiating future research and innovations to evolve better methods enabling a more comprehensive study of different aspects of antioxidants and to provide a vocabulary of terms related to antioxidants and scavengers for ROS/RNS. The main methods comprise the scavenging activity measurement of the hydroxyl radical (•OH), dioxide(•1–) (O2
•–: commonly known as the superoxide radical), dihydrogen dioxide (H2O2: commonly known as hydrogen peroxide), hydroxidochlorine (HOCl: commonly known as hypochlorous acid), dioxidooxidonitrate(1–) (ONOO−: commonly known as the peroxynitrite anion), and the peroxyl radical (ROO•). In spite of the diversity of methods, there is currently a great need to evaluate the scavenging activity of antioxidant compounds in vivo and in vitro. In addition, there are unsatisfactory methods frequently used, such as non-selective UV measurement of H2O2 scavenging, producing negative errors due to incomplete reaction of peroxide with flavonoids in the absence of transition metal ion catalysts. We also discussed the basic mechanisms of spectroscopic and electrochemical nanosensors for measuring ROS/RNS scavenging activity of antioxidants, together with leading trends and challenges and a wide range of applications. This project aids in the identification of reactive species and quantification of scavenging extents of antioxidants through various assays, makes the results comparable and more understandable, and brings a more rational basis to the evaluation of these assays and provides a critical evaluation of existing ROS/RNS scavenging assays to analytical, food chemical, and biomedical/clinical communities by emphasizing the need for developing more refined, rapid, simple, and low‐cost assays and thus opening the market for a wide range of analytical instruments, including reagent kits and sensors.
Collapse
Affiliation(s)
- Reşat Apak
- Department of Chemistry , Istanbul University-Cerrahpaşa, Faculty of Engineering , Avcılar, 34320 Istanbul , Turkey
| | - Antony Calokerinos
- Department of Chemistry , National and Kapodistrian University of Athens, School of Sciences , Panepistimiopolis, 15771 Athens , Greece
| | - Shela Gorinstein
- The Hebrew University, Hadassah Medical School, School of Pharmacy, The Institute for Drug Research , Jerusalem , Israel
| | - Marcela Alves Segundo
- Department of Chemical Sciences , LAQV, REQUIMTE, Faculty of Pharmacy, University of Porto , Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto , Portugal
| | - David Brynn Hibbert
- New South Wales University, School of Chemistry , Sydney , NSW 2052 , Australia
| | - İlhami Gülçin
- Department of Chemistry , Faculty of Science, Atatürk University , Erzurum , Turkey
| | - Sema Demirci Çekiç
- Department of Chemistry , Istanbul University-Cerrahpaşa, Faculty of Engineering , Avcılar, 34320 Istanbul , Turkey
| | - Kubilay Güçlü
- Department of Chemistry , Adnan Menderes University, Faculty of Arts and Sciences , Aydın , Turkey
| | - Mustafa Özyürek
- Department of Chemistry , Istanbul University-Cerrahpaşa, Faculty of Engineering , Avcılar, 34320 Istanbul , Turkey
| | - Saliha Esin Çelik
- Department of Chemistry , Istanbul University-Cerrahpaşa, Faculty of Engineering , Avcılar, 34320 Istanbul , Turkey
| | - Luís M. Magalhães
- Department of Chemical Sciences , LAQV, REQUIMTE, Faculty of Pharmacy, University of Porto , Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto , Portugal
| | - Patricia Arancibia-Avila
- Departamento de Ciencias Básicas , Laboratorio de Ecofisiología y Microalgas, Universidad del Bio-Bio , Chillán , Chile
| |
Collapse
|
8
|
Rajedadram A, Pin KY, Ling SK, Yan SW, Looi ML. Hydroxychavicol, a polyphenol from Piper betle leaf extract, induces cell cycle arrest and apoptosis in TP53-resistant HT-29 colon cancer cells. J Zhejiang Univ Sci B 2021; 22:112-122. [PMID: 33615752 DOI: 10.1631/jzus.b2000446] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
This study aims to elucidate the antiproliferative mechanism of hydroxychavicol (HC). Its effects on cell cycle, apoptosis, and the expression of c-Jun N-terminal kinase (JNK) and P38 mitogen-activated protein kinase (MAPK) in HT-29 colon cancer cells were investigated. HC was isolated from Piper betle leaf (PBL) and verified by high-performance liquid chromatography (HPLC), nuclear magnetic resonance (NMR), and gas chromatography-mass spectrometry (GC-MS). The cytotoxic effects of the standard drug 5-fluorouracil (5-FU), PBL water extract, and HC on HT-29 cells were measured after 24, 48, and 72 h of treatment. Cell cycle and apoptosis modulation by 5-FU and HC treatments were investigated up to 30 h. Changes in phosphorylated JNK (pJNK) and P38 (pP38) MAPK expression were observed up to 18 h. The half maximal inhibitory concentration (IC50) values of HC (30 μg/mL) and PBL water extract (380 μg/mL) were achieved at 24 h, whereas the IC50 of 5-FU (50 μmol/L) was obtained at 72 h. Cell cycle arrest at the G0/G1 phase in HC-treated cells was observed from 12 h onwards. Higher apoptotic cell death in HC-treated cells compared to 5-FU-treated cells (P<0.05) was observed. High expression of pJNK and pP38 MAPK was observed at 12 h in HC-treated cells, but not in 5-FU-treated HT-29 cells (P<0.05). It is concluded that HC induces cell cycle arrest and apoptosis of HT-29 cells, with these actions possibly mediated by JNK and P38 MAPK.
Collapse
Affiliation(s)
- Aiysvariyah Rajedadram
- School of Biosciences, Taylor's University, Lakeside Campus, 47500 Subang Jaya, Malaysia
| | - Kar Yong Pin
- Forest Research Institute Malaysia, 52109 Kepong, Malaysia
| | - Sui Kiong Ling
- Forest Research Institute Malaysia, 52109 Kepong, Malaysia
| | - See Wan Yan
- School of Biosciences, Taylor's University, Lakeside Campus, 47500 Subang Jaya, Malaysia
| | - Mee Lee Looi
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| |
Collapse
|
9
|
Transcriptome analysis reveals the molecular mechanisms of combined gamma-tocotrienol and hydroxychavicol in preventing the proliferation of 1321N1, SW1783, and LN18 glioma cancer cells. J Physiol Biochem 2019; 75:499-517. [DOI: 10.1007/s13105-019-00699-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 07/31/2019] [Indexed: 12/31/2022]
|
10
|
Ali A, Lim XY, Chong CH, Mah SH, Chua BL. Optimization of ultrasound-assisted extraction of natural antioxidants from Piper betle using response surface methodology. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2017.11.033] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
11
|
Ali A, Chong CH, Mah SH, Abdullah LC, Choong TSY, Chua BL. Impact of Storage Conditions on the Stability of Predominant Phenolic Constituents and Antioxidant Activity of Dried Piper betle Extracts. Molecules 2018; 23:E484. [PMID: 29473847 PMCID: PMC6017861 DOI: 10.3390/molecules23020484] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 12/13/2017] [Accepted: 12/18/2017] [Indexed: 11/17/2022] Open
Abstract
The phenolic constituents in Piper betle are well known for their antioxidant potential; however, current literature has very little information on their stability under the influence of storage factors. Present study evaluated the stability of total phenolic content (TPC) and antioxidant activity together with individual phenolic constituents (hydroxychavicol, eugenol, isoeugenol and allylpyrocatechol 3,4-diacetate) present in dried Piper betle's extract under different storage temperature of 5 and 25 °C with and without light for a period of six months. Both light and temperature significantly influenced TPC and its corresponding antioxidant activity over time. More than 95% TPC and antioxidant activity was retained at 5 °C in dark condition after 180 days of storage. Hydroxychavicol demonstrated the best stability with no degradation while eugenol and isoeugenol displayed moderate stability in low temperature (5 °C) and dark conditions. 4-allyl-1,2-diacetoxybenzene was the only compound that underwent complete degradation. A new compound, 2,4-di-tert-butylphenol, was detected after five weeks of storage only in the extracts exposed to light. Both zero-order and first-order kinetic models were adopted to describe the degradation kinetics of the extract's antioxidant activity. Zero-order displayed better fit with higher correlation coefficients (R² = 0.9046) and the half-life was determined as 62 days for the optimised storage conditions (5 °C in dark conditions).
Collapse
Affiliation(s)
- Ameena Ali
- School of Engineering, Taylor's University, Lakeside Campus, No 1, Jalan Taylor's, Subang Jaya, Selangor 47500, Malaysia.
| | - Chien Hwa Chong
- School of Engineering and Physical Sciences, Heriot-Watt University, Malaysia Campus, No 1 Jalan Venna P5/2, Precinct 5, Putrajaya 62200, Malaysia.
| | - Siau Hui Mah
- School of Biosciences, Taylor's University, Lakeside Campus, No 1, Jalan Taylor's, Subang Jaya, Selangor 47500, Malaysia.
| | - Luqman Chuah Abdullah
- Department of Chemical and Environmental Engineering, University Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia.
| | - Thomas Shean Yaw Choong
- Department of Chemical and Environmental Engineering, University Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia.
| | - Bee Lin Chua
- School of Engineering, Taylor's University, Lakeside Campus, No 1, Jalan Taylor's, Subang Jaya, Selangor 47500, Malaysia.
| |
Collapse
|
12
|
Ng PL, Rajab NF, Then SM, Mohd Yusof YA, Wan Ngah WZ, Pin KY, Looi ML. Piper betle leaf extract enhances the cytotoxicity effect of 5-fluorouracil in inhibiting the growth of HT29 and HCT116 colon cancer cells. J Zhejiang Univ Sci B 2015; 15:692-700. [PMID: 25091987 DOI: 10.1631/jzus.b1300303] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE The combination effect of Piper betle (PB) and 5-fluorouracil (5-FU) in enhancing the cytotoxic potential of 5-FU in inhibiting the growth of colon cancer cells was investigated. METHODS HT29 and HCT116 cells were subjected to 5-FU or PB treatment. 5-FU and PB were then combined and their effects on both cell lines were observed after 24 h of treatment. PB-5-FU interaction was elucidated by isobologram analysis. Apoptosis features of the treated cells were revealed by annexin V/PI stain. High-performance liquid chromatography (HPLC) was performed to exclude any possible chemical interaction between the compounds. RESULTS In the presence of PB extract, the cytotoxicity of 5-FU was observed at a lower dose (IC50 12.5 µmol/L) and a shorter time (24 h) in both cell lines. Both cell lines treated with 5-FU or PB alone induced a greater apoptosis effect compared with the combination treatment. Isobologram analysis indicated that PB and 5-FU interacted synergistically and antagonistically in inhibiting the growth of HT29 and HCT116 cells, respectively. CONCLUSIONS In the presence of PB, a lower dosage of 5-FU is required to achieve the maximum drug effect in inhibiting the growth of HT29 cells. However, PB did not significantly reduce 5-FU dosage in HCT116 cells. Our result showed that this interaction may not solely contribute to the apoptosis pathway.
Collapse
Affiliation(s)
- Pek Leng Ng
- Department of Biomedical Sciences, Faculty of Allied Health, Universiti Kebangsaan Malaysia (UKM), Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Malaysia; UKM Medical Molecular Biology Institute (UMBI), Universiti Kebangsaan Malaysia (UKM), Jalan Yaacob Latiff, Bandar Tun Razak, Cheras, 56000 Kuala Lumpur, Malaysia; School of Biomedical Science, University of Nottingham Malaysia Campus, 43500 Semenyih, Selangor, Malaysia; Department of Biochemistry, Faculty of Medicine, Universiti Kebangsaan Malaysia (UKM), Jalan Raja Muda Abdul Aziz, 50300 Kuala Lumpur, Malaysia; Forest Research Institute Malaysia (FRIM), 52109 Kuala Lumpur, Kepong, Malaysia; School of Biosciences, Taylor's University, Lakeside Campus, 47500 Subang Jaya, Selangor, Malaysia
| | | | | | | | | | | | | |
Collapse
|
13
|
Chang MC, Chang HH, Chan CP, Yeung SY, Hsien HC, Lin BR, Yeh CY, Tseng WY, Tseng SK, Jeng JH. p-Cresol affects reactive oxygen species generation, cell cycle arrest, cytotoxicity and inflammation/atherosclerosis-related modulators production in endothelial cells and mononuclear cells. PLoS One 2014; 9:e114446. [PMID: 25517907 PMCID: PMC4269396 DOI: 10.1371/journal.pone.0114446] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 11/09/2014] [Indexed: 02/07/2023] Open
Abstract
Aims Cresols are present in antiseptics, coal tar, some resins, pesticides, and industrial solvents. Cresol intoxication leads to hepatic injury due to coagulopathy as well as disturbance of hepatic circulation in fatal cases. Patients with uremia suffer from cardiovascular complications, such as atherosclerosis, thrombosis, hemolysis, and bleeding, which may be partly due to p-cresol toxicity and its effects on vascular endothelial and mononuclear cells. Given the role of reactive oxygen species (ROS) and inflammation in vascular thrombosis, the objective of this study was to evaluate the effect of p-cresol on endothelial and mononuclear cells. Methods EA.hy926 (EAHY) endothelial cells and U937 cells were exposed to different concentrations of p-cresol. Cytotoxicity was evaluated by 3-(4,5-Dimethylthiazol-2-yl)-2,5 -diphenyltetrazolium bromide (MTT) assay and trypan blue dye exclusion technique, respectively. Cell cycle distribution was analyzed by propidium iodide flow cytometry. Endothelial cell migration was studied by wound closure assay. ROS level was measured by 2′,7′-dichlorofluorescein diacetate (DCF) fluorescence flow cytometry. Prostaglandin F2α (PGF2α), plasminogen activator inhibitor-1 (PAI-1), soluble urokinase plasminogen activator receptor (suPAR), and uPA production were determined by Enzyme-linked immunosorbant assay (ELISA). Results Exposure to 100–500 µM p-cresol decreased EAHY cell number by 30–61%. P-cresol also decreased the viability of U937 mononuclear cells. The inhibition of EAHY and U937 cell growth by p-cresol was related to induction of S-phase cell cycle arrest. Closure of endothelial wounds was inhibited by p-cresol (>100 µM). P-cresol (>50 µM) also stimulated ROS production in U937 cells and EAHY cells but to a lesser extent. Moreover, p-cresol markedly stimulated PAI-1 and suPAR, but not PGF2α, and uPA production in EAHY cells. Conclusions p-Cresol may contribute to atherosclerosis and thrombosis in patients with uremia and cresol intoxication possibly due to induction of ROS, endothelial/mononuclear cell damage and production of inflammation/atherosclerosis-related molecules.
Collapse
Affiliation(s)
- Mei-Chi Chang
- Biomedical Science Team, Chang Gung University of Science and Technology, Kwei-Shan, Taoyuan, Taiwan
| | - Hsiao-Hua Chang
- Department of Dentistry, National Taiwan University Hospital and School of Dentistry, National Taiwan University Medical College, Taipei, Taiwan
| | - Chiu-Po Chan
- Department of Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan
- * E-mail: (CPC); (JHJ)
| | - Sin-Yuet Yeung
- Department of Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Hsiang-Chi Hsien
- Department of Dentistry, Chang Gung Memorial Hospital, Taipei, Taiwan
| | - Bor-Ru Lin
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Chien-Yang Yeh
- Department of Dentistry, National Taiwan University Hospital and School of Dentistry, National Taiwan University Medical College, Taipei, Taiwan
| | - Wan-Yu Tseng
- Department of Dentistry, National Taiwan University Hospital and School of Dentistry, National Taiwan University Medical College, Taipei, Taiwan
| | - Shui-Kuan Tseng
- Department of Dentistry, National Taiwan University Hospital and School of Dentistry, National Taiwan University Medical College, Taipei, Taiwan
| | - Jiiang-Huei Jeng
- Department of Dentistry, National Taiwan University Hospital and School of Dentistry, National Taiwan University Medical College, Taipei, Taiwan
- * E-mail: (CPC); (JHJ)
| |
Collapse
|
14
|
Gundala SR, Yang C, Mukkavilli R, Paranjpe R, Brahmbhatt M, Pannu V, Cheng A, Reid MD, Aneja R. Hydroxychavicol, a betel leaf component, inhibits prostate cancer through ROS-driven DNA damage and apoptosis. Toxicol Appl Pharmacol 2014; 280:86-96. [PMID: 25064160 DOI: 10.1016/j.taap.2014.07.012] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 07/12/2014] [Accepted: 07/15/2014] [Indexed: 02/08/2023]
Abstract
Dietary phytochemicals are excellent ROS-modulating agents and have been shown to effectively enhance ROS levels beyond toxic threshold in cancer cells to ensure their selective killing while leaving normal cells unscathed. Here we demonstrate that hydroxychavicol (HC), extracted and purified from Piper betel leaves, significantly inhibits growth and proliferation via ROS generation in human prostate cancer, PC-3 cells. HC perturbed cell-cycle kinetics and progression, reduced clonogenicity and mediated cytotoxicity by ROS-induced DNA damage leading to activation of several pro-apoptotic molecules. In addition, HC treatment elicited a novel autophagic response as evidenced by the appearance of acidic vesicular organelles and increased expression of autophagic markers, LC3-IIb and beclin-1. Interestingly, quenching of ROS with tiron, an antioxidant, offered significant protection against HC-induced inhibition of cell growth and down regulation of caspase-3, suggesting the crucial role of ROS in mediating cell death. The collapse of mitochondrial transmembrane potential by HC further revealed the link between ROS generation and induction of caspase-mediated apoptosis in PC-3 cells. Our data showed remarkable inhibition of prostate tumor xenografts by ~72% upon daily oral administration of 150mg/kg bw HC by quantitative tumor volume measurements and non-invasive real-time bioluminescent imaging. HC was well-tolerated at this dosing level without any observable toxicity. This is the first report to demonstrate the anti-prostate cancer efficacy of HC in vitro and in vivo, which is perhaps attributable to its selective prooxidant activity to eliminate cancer cells thus providing compelling grounds for future preclinical studies to validate its potential usefulness for prostate cancer management.
Collapse
Affiliation(s)
| | - Chunhua Yang
- Department of Biology, Georgia State University, Atlanta, GA 30303, USA
| | | | | | - Meera Brahmbhatt
- Department of Biology, Georgia State University, Atlanta, GA 30303, USA
| | - Vaishali Pannu
- Department of Biology, Georgia State University, Atlanta, GA 30303, USA
| | - Alice Cheng
- Department of Biology, Georgia State University, Atlanta, GA 30303, USA
| | - Michelle D Reid
- Department of Pathology, Emory University School of Medicine, Atlanta, GA, USA
| | - Ritu Aneja
- Department of Biology, Georgia State University, Atlanta, GA 30303, USA.
| |
Collapse
|
15
|
Wan Hasan WN, Kwak MK, Makpol S, Ngah WZW, Yusof YAM. Piper betle induces phase I & II genes through Nrf2/ARE signaling pathway in mouse embryonic fibroblasts derived from wild type and Nrf2 knockout cells. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2014; 14:72. [PMID: 24559113 PMCID: PMC3936848 DOI: 10.1186/1472-6882-14-72] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/03/2013] [Accepted: 02/11/2014] [Indexed: 12/30/2022]
Abstract
Background Nuclear factor-erythroid 2 p45 related factor 2 (Nrf2) is a primary transcription factor, protecting cells from oxidative stress by regulating a number of antioxidants and phase II detoxifying enzymes. Dietary components such as sulforaphane in broccoli and quercetin in onions have been shown to be inducers of Nrf2. Piper betle (PB) grows well in tropical climate and the leaves are used in a number of traditional remedies for the treatment of stomach ailments and infections among Asians. The aim of this study was to elucidate the effect of Piper betle (PB) leaves extract in Nrf2 signaling pathway by using 2 types of cells; mouse embryonic fibroblasts (MEFs) derived from wild-type (WT) and Nrf2 knockout (N0) mice. Methods WT and N0 cells were treated with 5 and 10 μg/ml of PB for 10 and 12-h for the determination of nuclear translocation of Nrf2 protein. Luciferase reporter gene activity was performed to evaluate the antioxidant response element (ARE)-induction by PB. Real-time PCR and Western blot were conducted on both WT and N0 cells after PB treatment for the determination of antioxidant enzymes [superoxide dismutase (SOD1) and heme-oxygenase (HO-1)], phase I oxidoreductase enzymes [NAD(P)H: quinone oxidoreductase (NQO1)] and phase II detoxifying enzyme [glutathione S-transferase (GST)]. Results Nuclear translocation of Nrf2 by PB in WT cells was better after 10 h incubation compared to 12 h. Real time PCR and Western blot analysis showed increased expressions of Nrf2, NQO1 and GSTA1 genes with corresponding increases in glutathione, NQO1 and HO-1 proteins in WT cells. Reporter gene ARE was stimulated by PB as shown by ARE/luciferase assay. Interestingly, PB induced SOD1 gene and protein expressions in N0 cells but not in WT cells. Conclusion The results of this study confirmed that PB activated Nrf2-ARE signaling pathway which subsequently induced some phase I oxidoreductase, phase II detoxifying and antioxidant genes expression via ARE reporter gene involved in the Nrf2 pathway with the exception of SOD1 which may not be dependent on this pathway.
Collapse
|
16
|
Gundala SR, Aneja R. Piper Betel Leaf: A Reservoir of Potential Xenohormetic Nutraceuticals with Cancer-Fighting Properties. Cancer Prev Res (Phila) 2014; 7:477-86. [DOI: 10.1158/1940-6207.capr-13-0355] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
17
|
Abrahim NN, Kanthimathi MS, Abdul-Aziz A. Piper betle shows antioxidant activities, inhibits MCF-7 cell proliferation and increases activities of catalase and superoxide dismutase. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012; 12:220. [PMID: 23153283 PMCID: PMC3533855 DOI: 10.1186/1472-6882-12-220] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 11/07/2012] [Indexed: 01/01/2023]
Abstract
BACKGROUND Breast cancer is the most common form of cancer and the focus on finding chemotherapeutic agents have recently shifted to natural products. Piper betle is a medicinal plant with various biological activities. However, not much data is available on the anti-cancer effects of P. betle on breast cancer. Due to the current interest in the potential effects of antioxidants from natural products in breast cancer treatment, we investigated the antioxidant activities of the leaves of P. betle and its inhibitory effect on the proliferation of the breast cancer cell line, MCF-7. METHODS The leaves of P. betle were extracted with solvents of varying polarities (water, methanol, ethyl acetate and hexane) and their phenolic and flavonoid content were determined using colorimetric assays. Phenolic composition was characterized using HPLC. Antioxidant activities were measured using FRAP, DPPH, superoxide anion, nitric oxide and hyroxyl radical scavenging assays. Biological activities of the extracts were analysed using MTT assay and antioxidant enzyme (catalase, superoxide dismutase, glutathione peroxidase) assays in MCF-7 cells. RESULTS Overall, the ethyl acetate extract showed the highest ferric reducing activity and radical scavenging activities against DPPH, superoxide anion and nitric oxide radicals. This extract also contained the highest phenolic content implying the potential contribution of phenolics towards the antioxidant activities. HPLC analyses revealed the presence of catechin, morin and quercetin in the leaves. The ethyl acetate extract also showed the highest inhibitory effect against the proliferation of MCF-7 cells (IC50=65 μg/ml). Treatment of MCF-7 cells with the plant extract increased activities of catalase and superoxide dismutase. CONCLUSIONS Ethyl acetate is the optimal solvent for the extraction of compounds with antioxidant and anti-proliferative activities. The increased activities of catalase and superoxide dismutase in the treated cells could alter the antioxidant defense system, potentially contributing towards the anti-proliferative effect. There is great potential for the ethyl acetate extract of P. betle leaf as a source of natural antioxidants and to be developed as therapeutics in cancer treatment.
Collapse
Affiliation(s)
- Noor Nazirahanie Abrahim
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
- University of Malaya Centre for Proteomics Research, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - M S Kanthimathi
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
- University of Malaya Centre for Proteomics Research, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Azlina Abdul-Aziz
- Department of Molecular Medicine, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
- University of Malaya Centre for Proteomics Research, University of Malaya, 50603 Kuala Lumpur, Malaysia
| |
Collapse
|
18
|
Dwivedi S, Aggarwal A, Dev M. All in the name of flavour, fragrance & freshness: commonly used smokeless tobacco preparations in & around a tertiary hospital in India. Indian J Med Res 2012; 136:836-41. [PMID: 23287132 PMCID: PMC3573606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
BACKGROUND & OBJECTIVES There is a general misconception that smokeless tobacco particularly sweetened and flavoured paan masala and gutkas are safe to use. The present study was undertaken with the objective of highlighting the deceptive and aggressive marketing techniques adopted by the manufacturers of smokeless tobacco preparations exploiting cultural, social and religious values. Another object was to highlight the lack of transparency in terms of content, weight, quality control and warning. METHODS All empty pouches of the used paan masalas, gutka, khaini or surti in and around a tertiary care hospital at east Delhi were collected. Their constituents were studied as per written declaration by the manufacturers on each packet. Information on net weight, cost, presence and type of warning, and quality assurance on each brand provided on side of the packets was noted. RESULTS A total of 1136 pouches of 33 brands/varieties were collected. Most of the gutka preparations contained tobacco, betel nut, unknown flavouring agents, undeclared spices and heavy metals. Warning regarding the harmful effect of tobacco was written in 90.9 per cent of brands with 81.8 per cent in English language only in minute font. Contents of the products were mentioned in 84.8 per cent of brands and only 27.3 per cent of those mentioned the net weight of the ingredients. INTERPRETATION & CONCLUSIONS Seemingly 'innocuous' tobacco preparations in the form of paan masalas, gutka, khaini, surti or mouth fresheners contain various harmful substance like tobacco, betel nut, sugar coated fennel, saccharine, heavy metals like silver, unknown flavouring agents and undeclared spices in unknown quantities. Lack of transparency in terms of content, weight, quality control and warning is duping unsuspecting consumers.
Collapse
Affiliation(s)
- Shridhar Dwivedi
- Department of Medicine/Preventive Cardiology, University College of Medical Sciences,University of Delhi & GTB Hospital, Delhi, India,Reprint requests: Dr Shridhar Dwivedi, Department of Medicine/Preventive Cardiology, University College of Medical Sciences, University of Delhi & GTB Hospital, Delhi 110 095, India e-mail:
| | - Amitesh Aggarwal
- Department of Medicine/Preventive Cardiology, University College of Medical Sciences,University of Delhi & GTB Hospital, Delhi, India
| | - Munish Dev
- Department of Medicine/Preventive Cardiology, University College of Medical Sciences,University of Delhi & GTB Hospital, Delhi, India
| |
Collapse
|
19
|
Ramamurthy CH, Kumar MS, Suyavaran VSA, Mareeswaran R, Thirunavukkarasu C. Evaluation of Antioxidant, Radical Scavenging Activity and Polyphenolics Profile in Solanum torvum L. Fruits. J Food Sci 2012; 77:C907-13. [DOI: 10.1111/j.1750-3841.2012.02830.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
20
|
Kamatou GP, Vermaak I, Viljoen AM. Eugenol--from the remote Maluku Islands to the international market place: a review of a remarkable and versatile molecule. Molecules 2012; 17:6953-81. [PMID: 22728369 PMCID: PMC6268661 DOI: 10.3390/molecules17066953] [Citation(s) in RCA: 207] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Revised: 05/18/2012] [Accepted: 05/30/2012] [Indexed: 11/16/2022] Open
Abstract
Eugenol is a major volatile constituent of clove essential oil obtained through hydrodistillation of mainly Eugenia caryophyllata (=Syzygium aromaticum) buds and leaves. It is a remarkably versatile molecule incorporated as a functional ingredient in numerous products and has found application in the pharmaceutical, agricultural, fragrance, flavour, cosmetic and various other industries. Its vast range of pharmacological activities has been well-researched and includes antimicrobial, anti-inflammatory, analgesic, anti-oxidant and anticancer activities, amongst others. In addition, it is widely used in agricultural applications to protect foods from micro-organisms during storage, which might have an effect on human health, and as a pesticide and fumigant. As a functional ingredient, it is included in many dental preparations and it has also been shown to enhance skin permeation of various drugs. Eugenol is considered safe as a food additive but due to the wide range of different applications, extensive use and availability of clove oil, it is pertinent to discuss the general toxicity with special reference to contact dermatitis. This review summarises the pharmacological, agricultural and other applications of eugenol with specific emphasis on mechanism of action as well as toxicity data.
Collapse
Affiliation(s)
| | | | - Alvaro M. Viljoen
- Author to whom correspondence should be addressed; ; Tel.: +27-12-382-6360; Fax: +27-12-382-6243
| |
Collapse
|
21
|
Biswas N, Mahato SK, Chowdhury AA, Chaudhuri J, Manna A, Vinayagam J, Chatterjee S, Jaisankar P, Chaudhuri U, Bandyopadhyay S. ICB3E induces iNOS expression by ROS-dependent JNK and ERK activation for apoptosis of leukemic cells. Apoptosis 2012; 17:612-26. [PMID: 22252531 DOI: 10.1007/s10495-011-0695-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
The role of c-Jun N terminal Kinase (JNK) has been well documented in various cellular stresses where it leads to cell death. Similarly, extracellular signal-regulated kinase (ERK) which was identified as a signalling molecule for survival pathway has been shown recently to be involved in apoptosis also. Recently we reported that ICB3E, a synthetic analogue of Piper betle leaf-derived apoptosis-inducing agent hydroxychavicol (HCH), possesses anti-chronic myeloid leukemia (CML) acitivity in vitro and in vivo without insight on mechanism of action. Here we report that ICB3E is three to four times more potent than HCH in inducing apoptosis of leukemic cells without having appreciable effects on normal human peripheral blood mononuclear cells, mouse fibroblast cell line NIH3T3 and monkey kidney epithelial cell line Vero. ICB3E causes early accumulation of mitochondria-derived reactive oxygen species (ROS) in K562 cells. Unlike HCH, ICB3E treatment caused ROS dependent activation of both JNK, ERK and induced the expression of iNOS leading to generation of nitric oxide (NO). This causes cleavage of caspase 9, 3 and PARP leading to apoptosis. Lack of cleavage of caspase 8 and inability of blocking chimera antibody to DR5 or neutralizing antibody to Fas to reverse ICB3E-mediated apoptosis suggest the involvement of only intrinsic pathway. Our data reveal a novel ROS-dependent JNK/ERK-mediated iNOS activation pathway which leads to NO mediated cell death by ICB3E.
Collapse
Affiliation(s)
- Nabendu Biswas
- Division of Cancer and Cell Biology, Council of Scientific and Industrial Research, Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Jadavpur, Kolkata, India
| | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Tsai WC, Wu MT, Wang GJ, Lee KT, Lee CH, Lu YH, Yen HW, Chu CS, Chen YT, Lin TH, Su HM, Hsu PC, Cheng KH, Duh TH, Ko YC, Sheu SH, Lai WT. Chewing areca nut increases the risk of coronary artery disease in Taiwanese men: a case-control study. BMC Public Health 2012; 12:162. [PMID: 22397501 PMCID: PMC3372426 DOI: 10.1186/1471-2458-12-162] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Accepted: 03/07/2012] [Indexed: 12/11/2022] Open
Abstract
Background Areca nut chewing has been reported to be associated with obesity, metabolic syndrome, hypertension, and cardiovascular mortality in previous studies. The aim of this study was to examine whether chewing areca nut increases the risk of coronary artery disease (CAD) in Taiwanese men. Methods This study is a hospital-based case-control study. The case patients were male patients diagnosed in Taiwan between 1996 and 2009 as having a positive Treadmill exercise test or a positive finding on the Thallium-201 single-photon emission computed tomography myocardial perfusion imaging. The case patients were further evaluated by coronary angiography to confirm their CAD. Obstructive CAD was defined as a ≥ 50% decrease in the luminal diameter of one major coronary artery. The patients who did not fulfill the above criteria of obstructive CAD were excluded. The potential controls were males who visited the same hospital for health check-ups and had a normal electrocardiogram but no history of ischemic heart disease or CAD during the time period that the case patients were diagnosed. The eligible controls were randomly selected and frequency-matched with the case patients based on age. Multiple logistic regression analyses were used to estimate the odds ratio of areca nut chewing and the risk of obstructive CAD. Results A total of 293 obstructive CAD patients and 720 healthy controls, all men, were analyzed. Subjects who chewed areca nut had a 3.5-fold increased risk (95% CI = 2.0-6.2) of having obstructive CAD than those without, after adjusting for other significant covariates. The dose-response relationship of chewing areca nut and the risk of obstructive CAD was also noted. After adjusting for other covariates, the 2-way additive interactions for obstructive CAD risk were also significant between areca nut use and cigarette smoking, hypertension and dyslipidemia. Conclusions Long-term areca nut chewing was an independent risk factor of obstructive CAD in Taiwanese men. Interactive effects between chewing areca nut and cigarette smoking, hypertension, and dyslipidemia were also observed for CAD risk. Further exploration of their underlying mechanisms is necessary.
Collapse
Affiliation(s)
- Wei-Chung Tsai
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Chakraborty JB, Mahato SK, Joshi K, Shinde V, Rakshit S, Biswas N, Choudhury Mukherjee I, Mandal L, Ganguly D, Chowdhury AA, Chaudhuri J, Paul K, Pal BC, Vinayagam J, Pal C, Manna A, Jaisankar P, Chaudhuri U, Konar A, Roy S, Bandyopadhyay S. Hydroxychavicol, a Piper betle leaf component, induces apoptosis of CML cells through mitochondrial reactive oxygen species-dependent JNK and endothelial nitric oxide synthase activation and overrides imatinib resistance. Cancer Sci 2012; 103:88-99. [PMID: 21943109 PMCID: PMC11164174 DOI: 10.1111/j.1349-7006.2011.02107.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Alcoholic extract of Piper betle (Piper betle L.) leaves was recently found to induce apoptosis of CML cells expressing wild type and mutated Bcr-Abl with imatinib resistance phenotype. Hydroxy-chavicol (HCH), a constituent of the alcoholic extract of Piper betle leaves, was evaluated for anti-CML activity. Here, we report that HCH and its analogues induce killing of primary cells in CML patients and leukemic cell lines expressing wild type and mutated Bcr-Abl, including the T315I mutation, with minimal toxicity to normal human peripheral blood mononuclear cells. HCH causes early but transient increase of mitochondria-derived reactive oxygen species. Reactive oxygen species-dependent persistent activation of JNK leads to an increase in endothelial nitric oxide synthase-mediated nitric oxide generation. This causes loss of mitochondrial membrane potential, release of cytochrome c from mitochondria, cleavage of caspase 9, 3 and poly-adenosine diphosphate-ribose polymerase leading to apoptosis. One HCH analogue was also effective in vivo in SCID mice against grafts expressing the T315I mutation, although to a lesser extent than grafts expressing wild type Bcr-Abl, without showing significant bodyweight loss. Our data describe the role of JNK-dependent endothelial nitric oxide synthase-mediated nitric oxide for anti-CML activity of HCH and this molecule merits further testing in pre-clinical and clinical settings.
Collapse
MESH Headings
- Animals
- Antineoplastic Agents/pharmacology
- Apoptosis/drug effects
- Benzamides
- Blotting, Western
- Drug Resistance, Neoplasm/drug effects
- Eugenol/analogs & derivatives
- Eugenol/chemistry
- Eugenol/pharmacology
- Flow Cytometry
- Fusion Proteins, bcr-abl/genetics
- Humans
- Imatinib Mesylate
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/drug therapy
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Leukocytes, Mononuclear/drug effects
- Leukocytes, Mononuclear/metabolism
- MAP Kinase Kinase 4/metabolism
- Male
- Membrane Potential, Mitochondrial/drug effects
- Mice
- Mice, Nude
- Mice, SCID
- Mitochondria/drug effects
- Mitochondria/metabolism
- Nitric Oxide/metabolism
- Nitric Oxide Synthase Type III/metabolism
- Phosphorylation/drug effects
- Piper betle/chemistry
- Piperazines/pharmacology
- Plant Extracts/pharmacology
- Plant Leaves/chemistry
- Pyrimidines/pharmacology
- Reactive Oxygen Species/metabolism
- Tumor Cells, Cultured
Collapse
Affiliation(s)
- Jayashree B Chakraborty
- Department of Cancer and Cell Biology, Council of Scientific and Industrial Research, Indian Institute of Chemical Biology, Kolkata, India
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Kalmes M, Blömeke B. Impact of eugenol and isoeugenol on AhR translocation, target gene expression, and proliferation in human HaCaT keratinocytes. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2012; 75:478-491. [PMID: 22686307 DOI: 10.1080/15287394.2012.674916] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The phenolic derivatives eugenol and isoeugenol, which are naturally found in essential oils of different spices, are commonly used as fragrances. Recently data demonstrated that growth suppression produced by these substances occurs in keratinocytes and that the effects may be mediated via aryl hydrocarbon receptor (AhR) interactions. In this study the effects of eugenol and isoeugenol were determined on intracellular localization of AhR, AhR target gene expression, AhR-dependent cell cycle regulation, and proliferation in HaCaT cells. Both compounds produced a rapid and marked translocation of AhR into the nucleus, induced the expression of the AhR target genes cytochrome P-450 1A1 (CYP1A1) and AhR repressor (AhRR), and inhibited proliferation of HaCaT cells. Among the G(1) phase cell cycle-related proteins, levels of the retinoblastoma protein (RB), which is known to interact with AhR, and levels of the cyclin dependent kinase (CDK) 6 were reduced by eugenol and isoeugenol, whereas steady-state levels of CDK2 and CDK4 remained unaffected. Protein levels of CDK inhibitor (CKI) p27(KIP1), known to be modulated in an AhR-dependent manner, were increased after treatment with both substances. In conclusion, data show that the antiproliferative properties of eugenol and isoeugenol in HaCaT cells are mediated through AhR, and thereby the molecular mechanisms of action in these cells were identified for the first time in this study.
Collapse
Affiliation(s)
- Michaela Kalmes
- Department of Environmental Toxicology, University of Trier, Trier, Germany
| | | |
Collapse
|
25
|
Maria Groh IA, Cartus AT, Vallicotti S, Kajzar J, Merz KH, Schrenk D, Esselen M. Genotoxic potential of methyleugenol and selected methyleugenol metabolites in cultured Chinese hamster V79 cells. Food Funct 2012; 3:428-36. [DOI: 10.1039/c2fo10221h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
26
|
Gülçin İ. Antioxidant Activity of Eugenol: A Structure–Activity Relationship Study. J Med Food 2011; 14:975-85. [DOI: 10.1089/jmf.2010.0197] [Citation(s) in RCA: 259] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Affiliation(s)
- İlhami Gülçin
- Department of Chemistry, Faculty of Sciences, Atatürk University, Erzurum, Turkey
- School of Health Services, İbrahim Cecen University, Agri, Turkey
| |
Collapse
|
27
|
Possible mechanism of betel-quid-extract-induced expression of matrix metalloproteinase-2. J Formos Med Assoc 2011; 109:838-47. [PMID: 21126656 DOI: 10.1016/s0929-6646(10)60129-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2009] [Revised: 10/09/2009] [Accepted: 12/30/2009] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND/PURPOSE Betel quid extract (BQE) has been demonstrated to induce matrix metalloproteinase (MMP)-2 expression. This study aimed to establish the possible mechanism involved in this event. METHODS Western blotting, reverse-transcription polymerase chain reaction, and gelatin zymography were used to study the expression level of MMP-2. LY294002, PD98059, U0126, N-acetyl-L-cysteine, SB203580, SP600125, and Bay 11-7082 were used to pretreat OECM-1 cells before BQE treatment and MMP-2 detection. RESULTS OECM-1 cells were subjected to short-term (10 minutes) or long-term (24 hours) BQE treatment (designated as SBT and LBT, respectively), and we found that both treatments increased MMP-2 protein and extracellular signal-regulated kinase (ERK) phosphorylation levels in a concentration- and time-dependent manner. LBT also increased MMP-2 mRNA level. LBT-induced MMP-2 secretion was not inhibited by PD98059 (up to 50 μM) when ERK was effectively blocked, but was attenuated by LY294002 (0-10 μM) in a concentration-dependent manner. This LBT effect was inhibited strongly by SB203580 (10 μM), SP600125 (10 μM), and Bay 11-7082 (10 μM) and mildly by N-acetyl-L-cysteine (5 mM), but not by U0126 (10 μM). CONCLUSION Both SBT and LBT upregulate MMP-2 expression, and LBT-induced MMP-2 expression might be mediated by phosphoinositide 3-kinase, p38 mitogen-activated protein kinase, c-Jun N-terminal kinase, and nuclear factor-κB, and to a lesser extent, by reactive oxygen species, rather than by ERK.
Collapse
|
28
|
Lin MH, Hsieh WF, Chiang WF, Hong WZ, Hsu YR, Cheng YC, Chen TC, Hsu KC, Lina PY, Liu SY, Liu YC. Autophagy induction by the 30–100kDa fraction of areca nut in both normal and malignant cells through reactive oxygen species. Oral Oncol 2010; 46:822-8. [DOI: 10.1016/j.oraloncology.2010.08.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Revised: 08/02/2010] [Accepted: 08/03/2010] [Indexed: 10/19/2022]
|
29
|
Chang HH, Chang MC, Lin LD, Lee JJ, Wang TM, Huang CH, Yang TT, Lin HJ, Jeng JH. The mechanisms of cytotoxicity of urethane dimethacrylate to Chinese hamster ovary cells. Biomaterials 2010; 31:6917-25. [DOI: 10.1016/j.biomaterials.2010.05.059] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2010] [Accepted: 05/21/2010] [Indexed: 12/11/2022]
|
30
|
WIDOWATI WAHYU, RATNAWATI HANA, RUSDI UDJUDJUNAEDI, WINARNO WAHYU, IMMANUEL VICTOR. Phytochemicalassay and Antiplatelet Activity of Fractions of Velvet Bean Seeds (Mucuna pruriens L.). HAYATI JOURNAL OF BIOSCIENCES 2010. [DOI: 10.4308/hjb.17.2.85] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
|
31
|
Ali I, Khan FG, Suri KA, Gupta BD, Satti NK, Dutt P, Afrin F, Qazi GN, Khan IA. In vitro antifungal activity of hydroxychavicol isolated from Piper betle L. Ann Clin Microbiol Antimicrob 2010; 9:7. [PMID: 20128889 PMCID: PMC2841090 DOI: 10.1186/1476-0711-9-7] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Accepted: 02/03/2010] [Indexed: 11/30/2022] Open
Abstract
Background Hydroxychavicol, isolated from the chloroform extraction of the aqueous leaf extract of Piper betle L., (Piperaceae) was investigated for its antifungal activity against 124 strains of selected fungi. The leaves of this plant have been long in use tropical countries for the preparation of traditional herbal remedies. Methods The minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) of hydroxychavicol were determined by using broth microdilution method following CLSI guidelines. Time kill curve studies, post-antifungal effects and mutation prevention concentrations were determined against Candida species and Aspergillus species "respectively". Hydroxychavicol was also tested for its potential to inhibit and reduce the formation of Candida albicans biofilms. The membrane permeability was measured by the uptake of propidium iodide. Results Hydroxychavicol exhibited inhibitory effect on fungal species of clinical significance, with the MICs ranging from 15.62 to 500 μg/ml for yeasts, 125 to 500 μg/ml for Aspergillus species, and 7.81 to 62.5 μg/ml for dermatophytes where as the MFCs were found to be similar or two fold greater than the MICs. There was concentration-dependent killing of Candida albicans and Candida glabrata up to 8 × MIC. Hydroxychavicol also exhibited an extended post antifungal effect of 6.25 to 8.70 h at 4 × MIC for Candida species and suppressed the emergence of mutants of the fungal species tested at 2 × to 8 × MIC concentration. Furthermore, it also inhibited the growth of biofilm generated by C. albicans and reduced the preformed biofilms. There was increased uptake of propidium iodide by C. albicans cells when exposed to hydroxychavicol thus indicating that the membrane disruption could be the probable mode of action of hydroxychavicol. Conclusions The antifungal activity exhibited by this compound warrants its use as an antifungal agent particularly for treating topical infections, as well as gargle mouthwash against oral Candida infections.
Collapse
Affiliation(s)
- Intzar Ali
- Clinical Microbiology Division Indian Institute of Integrative Medicine, Canal Road, Jammu-180 001, India
| | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Sreelatha S, Padma PR. Antioxidant activity and total phenolic content of Moringa oleifera leaves in two stages of maturity. PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2009; 64:303-11. [PMID: 19904611 DOI: 10.1007/s11130-009-0141-0] [Citation(s) in RCA: 244] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Antioxidants play an important role in inhibiting and scavenging free radicals, thus providing protection to human against infections and degenerative diseases. Current research is now directed towards natural antioxidants originated from plants due to safe therapeutics. Moringa oleifera is used in Indian traditional medicine for a wide range of various ailments. To understand the mechanism of pharmacological actions, antioxidant properties of the Moringa oleifera leaf extracts were tested in two stages of maturity using standard in vitro models. The successive aqueous extract of Moringa oleifera exhibited strong scavenging effect on 2, 2-diphenyl-2-picryl hydrazyl (DPPH) free radical, superoxide, nitric oxide radical and inhibition of lipid per oxidation. The free radical scavenging effect of Moringa oleifera leaf extract was comparable with that of the reference antioxidants. The data obtained in the present study suggests that the extracts of Moringa oleifera both mature and tender leaves have potent antioxidant activity against free radicals, prevent oxidative damage to major biomolecules and afford significant protection against oxidative damage.
Collapse
Affiliation(s)
- S Sreelatha
- Division of Physical Sciences, NTU, Singapore, Singapore.
| | | |
Collapse
|
33
|
Yeh HW, Chang MC, Lin CP, Tseng WY, Chang HH, Wang TM, Chen YJ, Lin CC, Yang TT, Lin LD, Jeng JH. Comparative cytotoxicity of five current dentin bonding agents: role of cell cycle deregulation. Acta Biomater 2009; 5:3404-10. [PMID: 19497393 DOI: 10.1016/j.actbio.2009.05.036] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2009] [Revised: 05/26/2009] [Accepted: 05/26/2009] [Indexed: 01/03/2023]
Abstract
To compare the cytotoxicity of three nano-dentin bonding agents (nano-DBAs) and two non-nano-DBAs using Chinese hamster ovary (CHO-K1) cells. We found that nano fillers were not the major contributing factor in DBA cytotoxicity, as analyzed by colony forming assay and 3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT) assay. Exposure of CHO-K1 cells to all three tested total-etching DBAs led to G(0)/G(1) cell cycle arrest, whereas exposure to higher concentrations of two tested nano-DBAs induced G(2)/M arrest. All five DBAs further induced apoptosis at the highest concentration, as analyzed by propidium iodide staining flow cytometry. The toxicity of all DBAs (1:4000v/v or higher) is related to increased reactive oxygen species (ROS) production, as analyzed by single cell DCF fluorescence flow cytometry. These results indicate that clinical application of DBAs may be potentially toxic to dental pulp tissues. Cytotoxicity of DBAs is associated with ROS production, cell cycle deregulation and apoptosis. Presence of methacrylate monomers such as PENTA and UDMA is possibly the major cytotoxic factor for DBAs. Further studies on other toxicological endpoints of nano-DBAs are necessary to highlight their safe use.
Collapse
|
34
|
Chen QH, Ganesh T, Brodie P, Slebodnick C, Jiang Y, Banerjee A, Bane S, Snyder JP, Kingston DGI. Design, synthesis and biological evaluation of bridged epothilone D analogues. Org Biomol Chem 2008; 6:4542-52. [PMID: 19039362 PMCID: PMC2790820 DOI: 10.1039/b814823f] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Six epothilone D analogues with a bridge between the C4-methyl and the C12-methyl carbons were prepared in an attempt to constrain epothilone D to its proposed tubulin-binding conformation. Ring-closing metathesis (RCM) was employed as the key step to build the C4-C26 bridge. In antiproliferative assays in the human ovarian cancer (A2780) and prostate cancer (PC3) cell lines, and also in tubulin assembly assay, all these compounds proved to be less active than epothilone D.
Collapse
Affiliation(s)
- Qiao-Hong Chen
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Arecoline and the 30–100 kDa fraction of areca nut extract differentially regulate mTOR and respectively induce apoptosis and autophagy: a pilot study. J Biomed Sci 2008; 15:823-31. [DOI: 10.1007/s11373-008-9273-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2008] [Accepted: 07/17/2008] [Indexed: 10/21/2022] Open
|
36
|
Evaluation of the antimicrobial, antioxidant, and anti-inflammatory activities of hydroxychavicol for its potential use as an oral care agent. Antimicrob Agents Chemother 2008; 53:216-22. [PMID: 18573934 DOI: 10.1128/aac.00045-08] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Hydroxychavicol isolated from the chloroform extraction of aqueous extract of Piper betle leaves showed inhibitory activity against oral cavity pathogens. It exhibited an inhibitory effect on all of the oral cavity pathogens tested (MICs of 62.5 to 500 microg/ml) with a minimal bactericidal concentration that was twofold greater than the inhibitory concentration. Hydroxychavicol exhibited concentration-dependent killing of Streptococcus mutans ATCC 25175 up to 4x MIC and also prevented the formation of water-insoluble glucan. Interestingly, hydroxychavicol exhibited an extended postantibiotic effect of 6 to 7 h and prevented the emergence of mutants of S. mutans ATCC 25175 and Actinomyces viscosus ATCC 15987 at 2x MIC. Furthermore, it also inhibited the growth of biofilms generated by S. mutans and A. viscosus and reduced the preformed biofilms by these bacteria. Increased uptake of propidium iodide by hydroxychavicol-treated cells of S. mutans and A. viscosus indicated that hydroxychavicol probably works through the disruption of the permeability barrier of microbial membrane structures. Hydroxychavicol also exhibited potent antioxidant and anti-inflammatory activities. This was evident from its concentration-dependent inhibition of lipid peroxidation and significant suppression of tumor necrosis factor alpha expression in human neutrophils. Its efficacy against adherent cells of S. mutans in water-insoluble glucan in the presence of sucrose suggests that hydroxychavicol would be a useful compound for the development of antibacterial agents against oral pathogens and that it has great potential for use in mouthwash for preventing and treating oral infections.
Collapse
|
37
|
Methodological aspects about in vitro evaluation of antioxidant properties. Anal Chim Acta 2008; 613:1-19. [DOI: 10.1016/j.aca.2008.02.047] [Citation(s) in RCA: 451] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2007] [Revised: 02/18/2008] [Accepted: 02/21/2008] [Indexed: 01/17/2023]
|
38
|
Yeung SY, Huang CS, Chan CP, Lin CP, Lin HN, Lee PH, Jia HW, Huang SK, Jeng JH, Chang MC. Antioxidant and pro-oxidant properties of chlorhexidine and its interaction with calcium hydroxide solutions. Int Endod J 2007; 40:837-44. [PMID: 17877724 DOI: 10.1111/j.1365-2591.2007.01271.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
AIM To evaluate the antioxidant and pro-oxidant properties of chlorhexidine (CHX). METHODOLOGY The scavenging and generation of reactive oxygen species (ROS) by CHX in the presence or absence of saturated Ca(OH)(2) solutions was evaluated. The reaction emitted chemiluminescence in the presence of lucigenin thus was determined by a luminometer to evaluate the levels of ROS production. Changes in DNA conformation were analysed by agarose gel electrophoresis. Paired Student's t-test was used to compare the difference between groups. RESULTS Chlorhexidine (0.00002-0.02%) effectively scavenged 56-88% of the superoxide radicals generated by the xanthine/xanthine oxidase reaction. Through analysis of PUC18 DNA conformation changes, CHX was shown to be a mild scavenger of hydroxyl radicals generated by H(2)O(2) plus FeCl(2). However, CHX (>0.083%) decreased the mobility of PUC18 plasmid DNA with potential production of DNA-DNA cross-link and severe DNA breaks (presence of DNA smear) at further higher concentrations. Furthermore, CHX induced ROS production including H(2)O(2) and superoxide radicals in 0.1N NaOH (pH = 12.76) or Ca(OH)(2) (pH = 12.5) solutions. CONCLUSION Chlorhexidine exhibited both antioxidant and pro-oxidant properties under different conditions. These events are possibly involved in the killing of root canal and periodontal microorganisms when CHX and Ca(OH)(2) were used in combination or separately. Potential genotoxicity and tissue damage when extruded into the periradicular tissue and at higher concentrations should be considered during periodontal and endodontic practice.
Collapse
Affiliation(s)
- S Y Yeung
- Department of Dentistry, Chang-Gung Memorial Hospital, Taipei, Taiwan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Chang MC, Uang BJ, Tsai CY, Wu HL, Lin BR, Lee CS, Chen YJ, Chang CH, Tsai YL, Kao CJ, Jeng JH. Hydroxychavicol, a novel betel leaf component, inhibits platelet aggregation by suppression of cyclooxygenase, thromboxane production and calcium mobilization. Br J Pharmacol 2007; 152:73-82. [PMID: 17641677 PMCID: PMC1978281 DOI: 10.1038/sj.bjp.0707367] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND AND PURPOSE Platelet hyperactivity is important in the pathogenesis of cardiovascular diseases. Betel leaf (PBL) is consumed by 200-600 million betel quid chewers in the world. Hydroxychavicol (HC), a betel leaf component, was tested for its antiplatelet effect. EXPERIMENTAL APPROACH We tested the effect of HC on platelet aggregation, thromboxane B(2) (TXB(2)) and reactive oxygen species (ROS) production, cyclooxygenase (COX) activity, ex vivo platelet aggregation and mouse bleeding time and platelet plug formation in vivo. The pharmacokinetics of HC in rats was also assessed. KEY RESULTS HC inhibited arachidonic acid (AA) and collagen-induced platelet aggregation and TXB(2) production. HC inhibited the thrombin-induced TXB(2) production, but not platelet aggregation. SQ29548, suppressed collagen- and thrombin-induced TXB(2) production, but not thrombin-induced platelet aggregation. HC also suppressed COX-1/COX-2 enzyme activity and the AA-induced ROS production and Ca(2+) mobilization. HC further inhibited the ex vivo platelet aggregation of platelet-rich plasma (>100 nmole/mouse) and prolonged platelet plug formation (>300 nmole/mouse) in mesenteric microvessels, but showed little effect on bleeding time in mouse tail. Moreover, pharmacokinetics analysis found that more than 99% of HC was metabolized within 3 min of administration in Sprague-Dawley rats in vivo. CONCLUSIONS AND IMPLICATIONS HC is a potent COX-1/COX-2 inhibitor, ROS scavenger and inhibits platelet calcium signaling, TXB(2) production and aggregation. HC could be a potential therapeutic agent for prevention and treatment of atherosclerosis and other cardiovascular diseases through its anti-inflammatory and antiplatelet effects, without effects on haemostatic functions.
Collapse
Affiliation(s)
- M C Chang
- Biomedical Science Team, Chang-Gung Institute of Technology Taoyuan, Taiwan
| | - B J Uang
- Department of Chemistry, National Tsing-Hua University Hsin-chu, Taiwan
| | - C Y Tsai
- Development Center for Biotechnology Taipei, Taiwan
| | - H L Wu
- Department of Chemistry, National Tsing-Hua University Hsin-chu, Taiwan
| | - B R Lin
- Department of Integrated Diagnostics and Therapeutics, National Taiwan University Hospital Taipei, Taiwan
| | - C S Lee
- Biomedical Science Team, Chang-Gung Institute of Technology Taoyuan, Taiwan
| | - Y J Chen
- Laboratory of Pharmacology and Toxicology, Department of Dentistry, National Taiwan University Hospital and National Taiwan University Medical College Taipei, Taiwan
| | - C H Chang
- Biomedical Science Team, Chang-Gung Institute of Technology Taoyuan, Taiwan
| | - Y L Tsai
- Laboratory of Pharmacology and Toxicology, Department of Dentistry, National Taiwan University Hospital and National Taiwan University Medical College Taipei, Taiwan
| | - C J Kao
- Biomedical Science Team, Chang-Gung Institute of Technology Taoyuan, Taiwan
| | - J H Jeng
- Laboratory of Pharmacology and Toxicology, Department of Dentistry, National Taiwan University Hospital and National Taiwan University Medical College Taipei, Taiwan
- Author for correspondence:
| |
Collapse
|
40
|
Metwally K, Aly O, Aly E, Banerjee A, Ravindra R, Bane S. Synthesis and biological activity of 2,5-diaryl-3-methylpyrimido[4,5-c]quinolin-1(2H)-one derivatives. Bioorg Med Chem 2007; 15:2434-40. [PMID: 17275318 DOI: 10.1016/j.bmc.2007.01.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2006] [Revised: 01/10/2007] [Accepted: 01/11/2007] [Indexed: 10/23/2022]
Abstract
A series of 2,5-diaryl-3-methylpyrimido[4,5-c]quinolin-1(2H)-ones (7-30), variously substituted at the 2- and 5-phenyl moieties, were synthesized and evaluated for their in vitro cytotoxic activity against a PC3 cancer cell line. Cytotoxicity data revealed that the type of substituent as well as substitution pattern have variable influence on cytotoxic activity. Among the compounds tested, compounds (9), (13), (18), (19), and (23) demonstrated appreciable cytotoxic activity with mean IC(50) values of 2.0, 1.4, 1.6, 2.2, and 1.9microM, respectively. Methyl substitution at the 2-phenyl ring was found to yield the least active compounds. Two of the most potent compounds (13) and (18) were further investigated for inhibition of tubulin polymerization and found to have no activity at the concentrations used in the assay.
Collapse
Affiliation(s)
- Kamel Metwally
- Department of Medicinal Chemistry, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt.
| | | | | | | | | | | |
Collapse
|
41
|
Ganesh T, Yang C, Norris A, Glass T, Bane S, Ravindra R, Banerjee A, Metaferia B, Thomas SL, Giannakakou P, Alcaraz AA, Lakdawala AS, Snyder JP, Kingston DGI. Evaluation of the tubulin-bound paclitaxel conformation: synthesis, biology, and SAR studies of C-4 to C-3' bridged paclitaxel analogues. J Med Chem 2007; 50:713-25. [PMID: 17263521 PMCID: PMC2585518 DOI: 10.1021/jm061071x] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The important anticancer drug paclitaxel binds to the beta-subunit of the alphabeta-tubulin dimer in the microtubule in a stoichiometric ratio, promoting microtubule polymerization and stability. The conformation of microtubule-bound drug has been the subject of intense study, and various suggestions have been proposed. In previous work we presented experimental and theoretical evidence that paclitaxel adopts a T-shaped conformation when it is bound to tubulin. In this study we report additional experimental data and calculations that delineate the allowable parameters for effective paclitaxel-tubulin interactions.
Collapse
Affiliation(s)
- Thota Ganesh
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
| | - Chao Yang
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
| | - Andrew Norris
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
| | - Tom Glass
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
| | - Susan Bane
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902
- To whom correspondence should be addressed. Phone: 540-231-6570. Fax: 540-231-3255. E-mail:
| | - Rudravajhala Ravindra
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902
| | - Abhijit Banerjee
- Department of Chemistry, State University of New York at Binghamton, Binghamton, NY 13902
| | - Belhu Metaferia
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
| | - Shala L. Thomas
- Winship Cancer Institute, Emory University School of Medicine, Atlanta, GA 30322
| | | | - Ana A. Alcaraz
- Department of Chemistry, Emory University, Atlanta, GA 30322
| | | | - James P. Snyder
- Department of Chemistry, Emory University, Atlanta, GA 30322
- To whom correspondence should be addressed. Phone: 540-231-6570. Fax: 540-231-3255. E-mail:
| | - David G. I. Kingston
- Department of Chemistry, M/C 0212, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061
- To whom correspondence should be addressed. Phone: 540-231-6570. Fax: 540-231-3255. E-mail:
| |
Collapse
|
42
|
Jeng JH, Lan WH, Wang JS, Chan CP, Ho YS, Lee PH, Wang YJ, Wang TM, Chen YJ, Chang MC. Signaling mechanism of thrombin-induced gingival fibroblast-populated collagen gel contraction. Br J Pharmacol 2007; 147:188-98. [PMID: 16299551 PMCID: PMC1615859 DOI: 10.1038/sj.bjp.0706462] [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] [Indexed: 01/11/2023] Open
Abstract
1.--Thrombin is activated during gingival tissue injury and inflammation. Thrombin (platelet)-rich plasma has been used for periodontal regeneration with success. Thrombin and other bacterial proteases also affect the functions of adjacent periodontal cells via stimulation of protease-activated receptors (PARs). 2.--We noted that thrombin (0.1-2 U ml(-1)), human, and frog PAR-1 agonist peptide (20-240 microM) induced the gingival fibroblast (GF)-populated collagen gel contraction within 2 h of exposure. However, PAR-2, PAR-3, and PAR-4 agonist peptide (20-240 microM) showed little effect on collagen gel contraction. U73122 (phospholipase C inhibitor) and 2-APB (IP3 antagonist) were effective in inhibition of GF contraction. 3.--Thrombin-induced GF contraction was inhibited by 5 mM EGTA (an extracellular calcium chelator) and verapamil (an L-type calcium channel blocker). In addition, W7 (10 and 25 microM, a calcium/calmodulin (CaM) inhibitor), ML-7 (50 microM, myosin light chain kinase (MLCK) inhibitor), and HA1077 (100 microM, Rho kinase inhibitor) completely inhibited the thrombin-induced collagen gel contraction. Thrombin also induced the phosphorylation of ERK1/ERK2 and elevated the Rho-GTP levels in GF. 4.--However, U0126 only partially inhibited the thrombin-induced GF contraction. Similarly, wortmannin (100 nM), LY294002 (20 microM) (two PI3K inhibitor) and genistein also showed partial inhibition. Moreover, NAC was not able to suppress the GF contraction, as supported by the slight decrease in reactive oxygen species production in GF by thrombin. 5.--Thrombin also stimulated metalloproteinase-2 (MMP-2) and MMP-3 production in GF. But addition of GM6001 or 1,10-phenanthroline, two MMP inhibitors, could not inhibit the thrombin-induced GF contraction. 6.--These results indicate that thrombin is crucial in the periodontal inflammation and wound healing by promoting GF contraction. This event is mainly mediated via PAR-1 activation, PLC activation, extracellular calcium influx via L-type calcium channel, and the calcium/CaM-MLCK and Rho kinase activation pathway.
Collapse
Affiliation(s)
- Jiiang-Huei Jeng
- Laboratory of Dental Pharmacology and Toxicology, Department of Dentistry, National Taiwan University Hospital and National Taiwan University, College of Medicine, Taipei, Taiwan
| | - Wan-Hong Lan
- Laboratory of Dental Pharmacology and Toxicology, Department of Dentistry, National Taiwan University Hospital and National Taiwan University, College of Medicine, Taipei, Taiwan
| | - Juo-Song Wang
- Laboratory of Dental Pharmacology and Toxicology, Department of Dentistry, National Taiwan University Hospital and National Taiwan University, College of Medicine, Taipei, Taiwan
| | - Chiu-Po Chan
- Department of Dentistry, Chang-Gung Memorial Hospital, Taipei, Taiwan
| | - Yuan-Soon Ho
- Graduate Institute of Biomedical Technology, Taipei Medical College, Taipei, Taiwan
| | - Po-Hsuen Lee
- Team of Biomedical Science, Chang-Gung Institute of Technology, Taoyuan, Taiwan
| | - Ying-Jen Wang
- Department of Environmental Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Tong-Mei Wang
- Laboratory of Dental Pharmacology and Toxicology, Department of Dentistry, National Taiwan University Hospital and National Taiwan University, College of Medicine, Taipei, Taiwan
| | - Yi-Jane Chen
- Laboratory of Dental Pharmacology and Toxicology, Department of Dentistry, National Taiwan University Hospital and National Taiwan University, College of Medicine, Taipei, Taiwan
| | - Mei-Chi Chang
- Team of Biomedical Science, Chang-Gung Institute of Technology, Taoyuan, Taiwan
- Author for correspondence:
| |
Collapse
|
43
|
Owen PL, Matainaho T, Sirois M, Johns T. Endothelial cytoprotection from oxidized LDL by some crude melanesian plant extracts is not related to their antioxidant capacity. J Biochem Mol Toxicol 2007; 21:231-42. [PMID: 17912700 DOI: 10.1002/jbt.20186] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Habitual consumption of some Melanesian medicinal and food plants may influence atherosclerosis development via their antioxidant capacity at the endothelial level. Areca nut (AN; Areca catechu), piper inflorescence (PBI; Piper betle), betel quid (BQ), guava buds (GB; Psidium guajava), the leaves (NL), juice (NJ), fruit (NF), and root (NR) of noni (Morinda citrifolia), the propagules of raw (MBR), and cooked (MBC) mangrove (Bruguiera gymnorrhiza) were evaluated for their ability to scavenge the 1,1-diphenyl-2-picryl-hydrazyle (DPPH) radical, to protect human low-density lipoprotein (LDL) from Cu2+-catalyzed oxidation and to protect cultured bovine aortal endothelial cells (BAEC) from oxidized LDL (oxLDL)-induced cytotoxicity. Polyphenol-rich extracts AN, PBI, and BQ were potent DPPH scavengers, having similar activity to quercetin and able to protect LDL from oxidation in a dose-dependent manner at concentrations higher than 10 microg/mL, but were pro-oxidants at lower concentrations. These extracts were cytotoxic to BAEC at concentrations above 10 microg/mL and were unable to prevent oxLDL endotheliopathy. GB and NR at 10 mug/mL displayed both the ability to delay LDL oxidation and prevent oxLDL cytotoxicity, although the latter lacked the ability to scavenge the DPPH radical. At higher concentrations, however, both were cytotoxic in themselves. The remaining noni extracts NF, NJ, NL, and both mangrove extracts MBC and MBR were unable to protect LDL from oxidation at all tested concentrations, but were effective cytoprotective agents at 50 microg/mL. All extracts were able to prevent an oxLDL-mediated increase in intracellular aldehyde generation but had little effect on extracellular peroxidation as measured by thiobarbituric acid reactive substances (TBARS). On the basis of this model system, we conclude that the antioxidant benefits of AN, PBI, and BQ may be offset by their enhancement of their cytotoxic effects of oxLDL toward BAEC, whereas GB and low concentrations of noni and mangrove may be considered antiatherogenic. The discrepancies between our in vitro and cellular culture experiments emphasize the importance of experimental conditions in evaluating the antioxidant potential of crude plant extracts.
Collapse
Affiliation(s)
- Patrick L Owen
- School of Dietetics and Human Nutrition, McGill University, Ste. Anne-de-Bellevue, Québec, Canada, H9X 3V9
| | | | | | | |
Collapse
|
44
|
Chang MC, Chan CP, Wang YJ, Lee PH, Chen LI, Tsai YL, Lin BR, Wang YL, Jeng JH. Induction of necrosis and apoptosis to KB cancer cells by sanguinarine is associated with reactive oxygen species production and mitochondrial membrane depolarization. Toxicol Appl Pharmacol 2006; 218:143-51. [PMID: 17196629 DOI: 10.1016/j.taap.2006.10.025] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2006] [Revised: 10/10/2006] [Accepted: 10/30/2006] [Indexed: 12/14/2022]
Abstract
Sanguinarine is a benzopheanthridine alkaloid present in the root of Sanguinaria canadensis L. and Chellidonium majus L. In this study, sanguinarine (2 and 3 microM) exhibited cytotoxicity to KB cancer cells by decreasing MTT reduction to 83% and 52% of control after 24-h of exposure. Sanguinarine also inhibited the colony forming capacity (>52-58%) and growth of KB cancer cells at concentrations higher than 0.5-1 microM. Short-term exposure to sanguinarine (>0.5 microM) effectively suppressed the adhesion of KB cells to collagen and fibronectin (FN). Sanguinarine (2 and 3 microM) induced evident apoptosis as indicated by an increase in sub-G0/G1 populations, which was detected after 6-h of exposure. Only a slight increase in cells arresting in S-phase and G2/M was noted. Induction of KB cell apoptosis and necrosis by sanguinarine (2 and 3 microM) was further confirmed by Annexin V-PI dual staining flow cytometry and the presence of DNA fragmentation. The cytotoxicity by sanguinarine was accompanied by an increase in production of reactive oxygen species (ROS) and depolarization of mitochondrial membrane potential as indicated by single cell flow cytometric analysis of DCF and rhodamine fluorescence. NAC (1 and 3 mM) and catalase (2000 U/ml) prevented the sanguinarine-induced ROS production and cytotoxicity, whereas dimethylthiourea (DMT) showed no marked preventive effect. These results suggest that sanguinarine has anticarcinogenic properties with induction of ROS production and mitochondrial membrane depolarization, which mediate cancer cell death.
Collapse
Affiliation(s)
- Mei-Chi Chang
- Biomedical Science Team, Chang Gung Institute of Technology, Taoyuan, Taiwan
| | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Chen PH, Tsai CC, Lin YC, Ko YC, Yang YH, Shieh TY, Ho PS, Li CM, Min-Shan Ko A, Chen CH. Ingredients contribute to variation in production of reactive oxygen species by areca quid. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2006; 69:1055-69. [PMID: 16840253 DOI: 10.1080/15287390500360224] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Areca quid (AQ) chewing has been implicated an independent risk factor for the development of oral cancer. Taiwanese areca quid (AQ) refers to a combination of areca nut (AN), lime, and inflorescence of Piper betle Linn. (IPB) or Piper betle leaf (PBL). Studies of AQ in other countries reported that AN extract combined with lime generates reactive oxygen species (ROS), such as hydroxyl radical (HO.), known to be a contributing factor in oral mucosa damage. To determine whether HO. is formed in the oral cavity during AQ chewing, the formation of meta-tyrosine (m-Tyr) and ortho-tyrosine (o-Tyr) from l-phenylalanine (Phe) was confirmed. It was demonstrated that combined aqueous extracts of AN, lime, metal ions (such as Cu2+ and Fe2+), and IPB or PBL produced HO.. Thus, the yield of HO. significantly increases when higher amounts of IPB or lime are added and also when Cu2+ and Fe2+ are increased. Further, the omission of any one of these ingredients significantly reduces the formation of HO.. Our results found that chewing AQ with IPB generated significantly higher HO. than chewing AQ with PBL, and may result in greater oxidative damage to the surrounding oral mucosa.
Collapse
Affiliation(s)
- Ping-Ho Chen
- Graduate Institute of Dental Sciences, College of Dental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Jeng JH, Kuo MYP, Lee PH, Wang YJ, Lee MY, Lee JJ, Lin BR, Tai TF, Chang MC. Toxic and metabolic effect of sodium butyrate on SAS tongue cancer cells: Role of cell cycle deregulation and redox changes. Toxicology 2006; 223:235-47. [PMID: 16737765 DOI: 10.1016/j.tox.2006.04.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2006] [Revised: 04/15/2006] [Accepted: 04/19/2006] [Indexed: 12/12/2022]
Abstract
Butyrate is a metabolite produced by oral and colonic microorganism. Butyrate has been shown to reduce colon cancer, whereas its role in oral carcinogenesis is not clear. Butyrate concentration in dental plaque and saliva ranged from 0.2 to 16 mM. In this study, we found that sodium butyrate inhibited the growth of SAS tongue cancer cells by 32% and 53% at concentrations of 1 and 2mM, respectively. Low concentrations of sodium butyrate (1-8mM) induced G0/G1 cell cycle arrest of SAS cells, whereas concentrations of 4-16 mM elicited G2/M arrest and a slight increase in apoptotic cell populations. These events were concomitant with induction of intracellular reactive oxygen species (ROS) production. An elevation in p21 mRNA and protein level was noted in SAS cells by sodium butyrate. On the contrary, a decline of cyclin Bl, cdc2 and cdc25C mRNA and protein expression in SAS cells was found after exposure to sodium butyrate. In addition, no evident increase in cdc2 inhibitory phosphorylation was found in sodium butyrate-treated SAS cancer cells. Inclusion of N-acetyl-l-cysteine (NAC) (3mM), catalase (1000 U/ml) and dimethylthiourea (DMT, 5mM), and also SOD (500 U/ml) attenuated the sodium butyrate-induced ROS production in SAS cells. However, they were not able to prevent the cell cycle arrest, apoptosis and growth inhibition in SAS cells induced by 1, 2 and 16 mM of sodium butyrate. These results indicate that sodium butyrate is toxic and inhibits the tongue cancer cell growth via induction of cell cycle arrest and apoptosis. Sodium butyrate mediates these events by mechanisms additional to ROS production.
Collapse
Affiliation(s)
- Jiiang-Huei Jeng
- Laboratory of Dental Pharmacology and Toxicology, Department of Dentistry, National Taiwan University Hospital and Medical College, National Taiwan University, Taipei, Taiwan
| | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Young SC, Wang CJ, Lin JJ, Peng PL, Hsu JL, Chou FP. Protection effect of piper betel leaf extract against carbon tetrachloride-induced liver fibrosis in rats. Arch Toxicol 2006; 81:45-55. [PMID: 16676162 DOI: 10.1007/s00204-006-0106-0] [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: 01/13/2006] [Accepted: 03/27/2006] [Indexed: 01/18/2023]
Abstract
Piper betel leaves (PBL) are used in Chinese folk medicine for the treatment of various disorders. PBL has the biological capabilities of detoxication, antioxidation, and antimutation. In this study, we evaluated the antihepatotoxic effect of PBL extract on the carbon tetrachloride (CCl(4))-induced liver injury in a rat model. Fibrosis and hepatic damage, as reveled by histology and the activities of aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were induced in rats by an administration of CCl(4) (8%, 1 ml/kg body weight) thrice a week for 4 weeks. PBL extract significantly inhibited the elevated AST and ALT activities caused by CCl(4) intoxication. It also attenuated total glutathione S-transferase (GST) activity and GST alpha isoform activity, and on the other hand, enhanced superoxide dismutase (SOD) and catalase (CAT) activities. The histological examination showed the PBL extract protected liver from the damage induced by CCl(4) by decreasing alpha-smooth muscle actin (alpha-sma) expression, inducing active matrix metalloproteinase-2 (MMP2) expression though Ras/Erk pathway, and inhibiting TIMP2 level that consequently attenuated the fibrosis of liver. The data of this study support a chemopreventive potential of PBL against liver fibrosis.
Collapse
MESH Headings
- Actins/metabolism
- Alanine Transaminase/metabolism
- Animals
- Aspartate Aminotransferases/metabolism
- Blotting, Western
- Body Weight/drug effects
- Carbon Tetrachloride/administration & dosage
- Carbon Tetrachloride/toxicity
- Catalase/metabolism
- Dose-Response Relationship, Drug
- Drugs, Chinese Herbal/chemistry
- Drugs, Chinese Herbal/isolation & purification
- Drugs, Chinese Herbal/therapeutic use
- Glutathione Transferase/metabolism
- Hydroxyl Radical/metabolism
- Injections, Intraperitoneal
- Liver/drug effects
- Liver/metabolism
- Liver/pathology
- Liver Cirrhosis, Experimental/chemically induced
- Liver Cirrhosis, Experimental/drug therapy
- Liver Cirrhosis, Experimental/prevention & control
- Male
- Matrix Metalloproteinase 2/metabolism
- Mitogen-Activated Protein Kinase Kinases/metabolism
- Phytotherapy
- Piper betle/chemistry
- Plant Leaves/chemistry
- Rats
- Rats, Wistar
- Superoxide Dismutase/metabolism
Collapse
Affiliation(s)
- Shun-Chieh Young
- Institute of Biochemistry and Biotechnology, Chung Shan Medical University, No. 110, Section 2, Chien Kauo N. Road, Taichung 402, Taiwan
| | | | | | | | | | | |
Collapse
|
48
|
Cifuentes M, Schilling B, Ravindra R, Winter J, Janik ME. Synthesis and biological evaluation of B-ring modified colchicine and isocolchicine analogs. Bioorg Med Chem Lett 2006; 16:2761-4. [PMID: 16504507 DOI: 10.1016/j.bmcl.2006.02.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2005] [Revised: 02/02/2006] [Accepted: 02/02/2006] [Indexed: 12/22/2022]
Abstract
A series of modified colchicine and isocolchicine analogs (C-7 substituent) were synthesized and evaluated in vitro against a PC3 cancer cell line and for inhibition of microtubule polymerization. The colchicine analogs all displayed strong inhibition of tubulin polymerization, while compounds 6 and 20 also possessed an increased cytotoxic activity as compared to colchicine. More importantly, isocolchicine analogs 7, 15, and 17 showed inhibition of microtubule polymerization with IC(50) values ranging from 58 to 68muM. In addition, 7 displayed strong cytotoxic activity with an IC(50)=93nM which was more potent than colchicine analog 12.
Collapse
|
49
|
Lee PH, Chang MC, Chang WH, Wang TM, Wang YJ, Hahn LJ, Ho YS, Lin CY, Jeng JH. Prolonged exposure to arecoline arrested human KB epithelial cell growth: Regulatory mechanisms of cell cycle and apoptosis. Toxicology 2006; 220:81-9. [PMID: 16413651 DOI: 10.1016/j.tox.2005.07.026] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2005] [Revised: 07/19/2005] [Accepted: 07/28/2005] [Indexed: 10/25/2022]
Abstract
Arecoline, the main areca alkaloid in betel quid (BQ), is reported to have cytotoxic, genotoxic, and mutagenic effects in various cells. It shows strong correlation to the incidence of oral submucous fibrosis, leukoplakia, and oral cancer. To clarify the role of arecoline in BQ-induced carcinogenesis, primary human gingival keratinocyes (GK) and human KB epithelial cells were used for studying the molecular mechanisms of arecoline-mediated cell cycle deregulation for comparison. After 24 h of exposure, arecoline (0.2-0.8 mM) inhibited KB cell growth in a dose- and time-dependent manner with a reduction in cell number by 27-37 and 37-58%, respectively, as determined by 3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT) and sulforhodamine B (SRB) assays. Incubation of KB cells with arecoline (0.1-0.4 mM) caused late-S and G2/M phases' cell cycle arrest. Western blot analysis revealed that arecoline induced cyclin Bl, Wee 1, and phosphorylated cdc2 protein levels whereas it declined p21 protein expression in KB cancer cells. Nevertheless, arecoline induced p21, but decreased cdc2 and cyclin B1 protein levels in GK. We demonstrated that higher concentrations of arecoline (0.2-1.2 mM) induced both cell necrosis and apoptosis as detected by DNA fragmentation and Annexin V-PI staining after long-term (48 h) treatment. Our results suggest that differential regulation of S and/or G2/M cell cycle-related proteins in the GK and KB cells play a crucial role in different stages of BQ-mediated carcinogenesis.
Collapse
Affiliation(s)
- Po-Hsuen Lee
- Laboratory of Dental Pharmacology & Toxicology, Department of Dentistry, National Taiwan University Hospital, National Taiwan University Medical College, No. 1, Chang-Te Street, Taipei 100, Taiwan
| | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Li W, Tsubouchi R, Qiao S, Haneda M, Murakami K, Yoshino M. Inhibitory action of eugenol compounds on the production of nitric oxide in RAW264.7 macrophages. Biomed Res 2006; 27:69-74. [PMID: 16707845 DOI: 10.2220/biomedres.27.69] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Effects of eugenol compounds on the production of nitric oxide (NO) in RAW264.7 macrophages were analyzed in relation to the anti-inflammatory action of these compounds. Eugenol and isoeugenol inhibited lipopolysaccharide (LPS)-dependent production of NO, which was due to the inhibition of protein synthesis of inducible nitric oxide synthase (iNOS). Isoeugenol showed the most effective inhibitory effect and eugenol was less effective. LPS-dependent expression of cyclooxygenase-2 (COX-2) protein was also inhibited markedly by isoeugenol, and less effectively by eugenol. Anti-inflammatory action of eugenol compounds may be explained by the inhibition of NO production and COX-2 expression, the pro-inflammatory mediators.
Collapse
Affiliation(s)
- Weihua Li
- Department of Biochemistry, Aichi Medical University School of Medicine, Aichi, Japan
| | | | | | | | | | | |
Collapse
|