1
|
Mabrouk AA, Tadros MI, El-Refaie WM. Improving the efficacy of Cyclooxegenase-2 inhibitors in the management of oral cancer: Insights into the implementation of nanotechnology and mucoadhesion. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2020.102240] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
2
|
Shin DM, Nannapaneni S, Patel MR, Shi Q, Liu Y, Chen Z, Chen AY, El-Deiry MW, Beitler JJ, Steuer CE, Roser SM, Klein AM, Owonikoko TK, Ramalingam SS, Khuri FR, Chen ZG, Saba NF. Phase Ib Study of Chemoprevention with Green Tea Polyphenon E and Erlotinib in Patients with Advanced Premalignant Lesions (APL) of the Head and Neck. Clin Cancer Res 2020; 26:5860-5868. [PMID: 32943457 DOI: 10.1158/1078-0432.ccr-20-2276] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 07/30/2020] [Accepted: 09/04/2020] [Indexed: 11/16/2022]
Abstract
PURPOSE On the basis of synergistic effects between green tea polyphenon E (PPE) and EGFR-tyrosine kinase inhibitor in preclinical studies, we conducted a phase Ib study of the PPE and erlotinib combination in patients with advanced premalignant lesions (APL) of the oral cavity and larynx. PATIENTS AND METHODS Patients were treated with a fixed dose of PPE (200 mg three times a day) and dose escalation of erlotinib (50, 75, 100 mg daily) for 6 months with tissue biopsy at baseline and 6 months. Primary endpoints were safety and toxicity; secondary endpoints were evaluation of pathologic response, cancer-free survival (CFS), overall survival (OS), and biomarker modulation. RESULTS Among 21 enrolled patients, 19 began treatment and 17 completed 6 months of treatment with PPE and erlotinib. Main characteristics of treated patients: 15 severe dysplasia or carcinoma in situ and 17 oral cavity. Only skin rash was associated with dose-limiting toxicity and MTD. Recommended doses for phase II studies are PPE 600 mg daily plus erlotinib 100 mg daily for 6 months. Pathologic responses in 17 evaluable patients: pathologic complete response (47%) and pathologic partial response (18%). The 5-year CFS and OS were 66.3% and 93%, respectively. Among tested biomarkers, only phosphorylated ERK was correlated with response to treatment. CONCLUSIONS Treatment with PPE and erlotinib combination was well tolerated in patients with APLs of the head and neck, and showed a high rate of pathologic response with excellent CFS. This combination deserves further investigation for the chemoprevention and/or prevention of second primary tumors in early-stage head and neck cancer.
Collapse
Affiliation(s)
- Dong M Shin
- Department of Hematology and Medical Oncology, Emory University Winship Cancer Institute, Atlanta, Georgia.
| | - Sreenivas Nannapaneni
- Department of Hematology and Medical Oncology, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Mihir R Patel
- Department of Otolaryngology, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Qiuying Shi
- Department of Pathology and Laboratory Medicine, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Yuan Liu
- Department of Biostatistics and Bioinformatics, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Zhengjia Chen
- Department of Biostatistics and Bioinformatics, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Amy Y Chen
- Department of Otolaryngology, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Mark W El-Deiry
- Department of Otolaryngology, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Jonathan J Beitler
- Department of Radiation Oncology, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Conor E Steuer
- Department of Hematology and Medical Oncology, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Steven M Roser
- Department of Oral and Maxillofacial Surgery, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Adam M Klein
- Department of Otolaryngology, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Taofeek K Owonikoko
- Department of Hematology and Medical Oncology, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Suresh S Ramalingam
- Department of Hematology and Medical Oncology, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Fadlo R Khuri
- Department of Hematology and Medical Oncology, Emory University Winship Cancer Institute, Atlanta, Georgia.,Emory University Winship Cancer Institute, Atlanta, Georgia.,American University of Beirut, Beirut, Lebanon
| | - Zhuo G Chen
- Department of Hematology and Medical Oncology, Emory University Winship Cancer Institute, Atlanta, Georgia
| | - Nabil F Saba
- Department of Hematology and Medical Oncology, Emory University Winship Cancer Institute, Atlanta, Georgia
| |
Collapse
|
3
|
Yadav TC, Kumar N, Raj U, Goel N, Vardawaj PK, Prasad R, Pruthi V. Exploration of interaction mechanism of tyrosol as a potent anti-inflammatory agent. J Biomol Struct Dyn 2019; 38:382-397. [PMID: 30887884 DOI: 10.1080/07391102.2019.1575283] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Drug discovery for a vigorous and feasible lead candidate is a challenging scientific mission as it requires expertise, experience, and huge investment. Natural products and their derivatives having structural diversity are renowned source of therapeutic agents since many years. Tyrosol (a natural phenylethanoid) has been extracted from olive oil, and its structure was confirmed by elemental analysis, FT-IR, FT-NMR, and single crystal X-ray crystallography. The conformational analysis for tyrosol geometry was performed by Gaussian 09 in terms of density functional theory. Validation of bond lengths and bond angles obtained experimentally as well as theoretically were performed with the help of curve fitting analysis, and values of correlation coefficient (R) obtained as 0.988 and 0.984, respectively. The charge transfer within the tyrosol molecule was confirmed by analysis of HOMO→LUMO molecular orbitals. In molecular docking with COX-2 (PDB ID: 5F1A), tyrosol was found to possess satisfactory binding affinity as compared to other NSAIDs (Aspirin, Ibuprofen, and Naproxen) and a COX-2 selective drug (Celecoxib). ADMET prediction, drug-likeness and bioactivity score altogether confirm the lead/drug like potential of tyrosol. Further investigation of simulation quality plot, RMSD and RMSF plots, ligands behavior plot as well as post simulation analysis manifest the consistency of 5F1A-tyrosol complex throughout the 20 ns molecular simulation process that signifies its compactness and stability within the receptor pocket. AbbreviationsADMETAbsorption, Distribution, Metabolism, Excretion and ToxicityÅAngstromCOX-2Cyclooxygenase-2DFTDensity Functional TheoryDMFDimethylformamideFMOFrontier Molecular OrbitalFT-IRFourier-transform Infrared SpectroscopyFT-NMRNuclear Magnetic Resonance SpectroscopyHOMOHighest Occupied Molecular OrbitalLUMOLowest Unoccupied Molecular OrbitalMDMolecular DynamicsNSNanosecondNSAIDsNon-steroidal anti-inflammatory drugsOPEOsiris Property ExplorerRMSDRoot-Mean-Square DeviationRMSFRoot Sean Square FluctuationCommunicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- Tara Chand Yadav
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, India
| | - Naresh Kumar
- Discipline of Biosciences and Biomedical Engineering, Indian Institute of Technology Indore, Indore, India
| | - Utkarsh Raj
- Department of Bioinformatics, Indian Institute of Information Technology Allahabad, Allahabad, India
| | - Nidhi Goel
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Pritish Kumar Vardawaj
- Department of Bioinformatics, Indian Institute of Information Technology Allahabad, Allahabad, India
| | - Ramasare Prasad
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, India
| | - Vikas Pruthi
- Department of Biotechnology, Indian Institute of Technology Roorkee, Roorkee, India
| |
Collapse
|
4
|
Oghumu S, Casto BC, Ahn-Jarvis J, Weghorst LC, Maloney J, Geuy P, Horvath KZ, Bollinger CE, Warner BM, Summersgill KF, Weghorst CM, Knobloch TJ. Inhibition of Pro-inflammatory and Anti-apoptotic Biomarkers during Experimental Oral Cancer Chemoprevention by Dietary Black Raspberries. Front Immunol 2017; 8:1325. [PMID: 29109723 PMCID: PMC5660285 DOI: 10.3389/fimmu.2017.01325] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 09/29/2017] [Indexed: 01/12/2023] Open
Abstract
Oral cancer continues to be a significant public health problem worldwide. Recently conducted clinical trials demonstrate the ability of black raspberries (BRBs) to modulate biomarkers of molecular efficacy that supports a chemopreventive strategy against oral cancer. However, it is essential that a preclinical animal model of black raspberry (BRB) chemoprevention which recapitulates human oral carcinogenesis be developed, so that we can validate biomarkers and evaluate potential mechanisms of action. We therefore established the ability of BRBs to inhibit oral lesion formation in a carcinogen-induced rat oral cancer model and examined potential mechanisms. F344 rats were administered 4-nitroquinoline 1-oxide (4NQO) (20 µg/ml) in drinking water for 14 weeks followed by regular drinking water for 6 weeks. At week 14, rats were fed a diet containing either 5 or 10% BRB, or 0.4% ellagic acid (EA), a BRB phytochemical. Dietary administration of 5 and 10% BRB reduced oral lesion incidence and multiplicity by 39.3 and 28.6%, respectively. Histopathological analyses demonstrate the ability of BRBs and, to a lesser extent EA, to inhibit the progression of oral cancer. Oral lesion inhibition by BRBs was associated with a reduction in the mRNA expression of pro-inflammatory biomarkers Cxcl1, Mif, and Nfe2l2 as well as the anti-apoptotic and cell cycle associated markers Birc5, Aurka, Ccna1, and Ccna2. Cellular proliferation (Ki-67 staining) in tongue lesions was inhibited by BRBs and EA. Our study demonstrates that, in the rat 4NQO oral cancer model, dietary administration of BRBs inhibits oral carcinogenesis via inhibition of pro-inflammatory and anti-apoptotic pathways.
Collapse
Affiliation(s)
- Steve Oghumu
- Division of Environmental Health Sciences, College of Public Health, The Ohio State University Columbus, Columbus, OH, United States.,Comprehensive Cancer Center, The Ohio State University Columbus, Columbus, OH, United States
| | - Bruce C Casto
- Division of Environmental Health Sciences, College of Public Health, The Ohio State University Columbus, Columbus, OH, United States.,Comprehensive Cancer Center, The Ohio State University Columbus, Columbus, OH, United States
| | - Jennifer Ahn-Jarvis
- Division of Environmental Health Sciences, College of Public Health, The Ohio State University Columbus, Columbus, OH, United States
| | - Logan C Weghorst
- Division of Environmental Health Sciences, College of Public Health, The Ohio State University Columbus, Columbus, OH, United States
| | - Jim Maloney
- Division of Environmental Health Sciences, College of Public Health, The Ohio State University Columbus, Columbus, OH, United States
| | - Paul Geuy
- Division of Environmental Health Sciences, College of Public Health, The Ohio State University Columbus, Columbus, OH, United States
| | - Kyle Z Horvath
- Division of Environmental Health Sciences, College of Public Health, The Ohio State University Columbus, Columbus, OH, United States
| | - Claire E Bollinger
- Division of Environmental Health Sciences, College of Public Health, The Ohio State University Columbus, Columbus, OH, United States
| | - Blake M Warner
- School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Kurt F Summersgill
- School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Christopher M Weghorst
- Division of Environmental Health Sciences, College of Public Health, The Ohio State University Columbus, Columbus, OH, United States.,Comprehensive Cancer Center, The Ohio State University Columbus, Columbus, OH, United States.,Department of Otolaryngology, College of Medicine, The Ohio State University Columbus, Columbus, OH, United States
| | - Thomas J Knobloch
- Division of Environmental Health Sciences, College of Public Health, The Ohio State University Columbus, Columbus, OH, United States.,Comprehensive Cancer Center, The Ohio State University Columbus, Columbus, OH, United States
| |
Collapse
|
5
|
Benoliel R, Epstein J, Eliav E, Jurevic R, Elad S. Orofacial Pain in Cancer: Part I—Mechanisms. J Dent Res 2016; 86:491-505. [PMID: 17525348 DOI: 10.1177/154405910708600604] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The mechanisms involved, and possible treatment targets, in orofacial pain due to cancer are poorly understood. The aim of the first of this two-part series is to review the involved pathophysiological mechanisms and explore their possible roles in the orofacial region. However, there is a lack of relevant research in the trigeminal region, and we have therefore applied data accumulated from experiments on cancer pain mechanisms in rodent spinal models. In the second part, we review the clinical presentation of cancer-associated orofacial pain at various stages: initial diagnosis, during therapy (chemo-, radiotherapy, surgery), and in the post-therapy period. In the present article, we provide a brief outline of trigeminal functional neuro-anatomy and pain-modulatory pathways. Tissue destruction by invasive tumors (or metastases) induces inflammation and nerve damage, with attendant acute pain. In some cases, chronic pain, involving inflammatory and neuropathic mechanisms, may ensue. Distant, painful effects of tumors include paraneoplastic neuropathic syndromes and effects secondary to the release of factors by the tumor (growth factors, cytokines, and enzymes). Additionally, pain is frequent in cancer management protocols (surgery, chemotherapy, and radiotherapy). Understanding the mechanisms involved in cancer-related orofacial pain will enhance patient management.
Collapse
Affiliation(s)
- R Benoliel
- Department of Oral Medicine, The Hebrew University, Hadassah Faculty of Dental Medicine, PO Box 12272, Jerusalem 91120, Israel.
| | | | | | | | | |
Collapse
|
6
|
Cheng A, Han C, Fang X, Sun J, Chen X, Wan F. Extractable and non-extractable polyphenols from blueberries modulate LPS-induced expression of iNOS and COX-2 in RAW264.7 macrophages via the NF-κB signalling pathway. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2016; 96:3393-3400. [PMID: 26538333 DOI: 10.1002/jsfa.7519] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 10/09/2015] [Accepted: 11/01/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND Plant polyphenols are rich in blueberries that have a wide range of properties beneficial to human health. There are two types, according to the solubility of polyphenols, which were defined as extractable polyphenols (EPP) and non-extractable polyphenols (NEPP), respectively. At present, in most of reports, 'total polyphenol' refers only to EPP excluding NEPP. In this paper, the effects of EPP and NEPP on lipopolysaccharides (LPS) induced production of nitric oxide (NO) and gene expression of inducible NO synthase (iNOS) and cyclooxygenase-2 (COX-2) in RAW264.7 cells via nuclear factor-κB (NF-κB) signalling pathway were compared. RESULTS The results showed that EPP and NEPP from blueberries significantly inhibited the LPS-induced production of NO and gene expression of iNOS and COX-2 in cells. The constitutive level of p65 sub-unit of NF-κB was obviously detected after the treatments with EPP or NEPP. By contrast, the level of phosphorylated p65 (P-p65) was strongly inhibited by EPP or NEPP. EPP had a stronger inhibition on the gene expression of iNOS and COX-2 than that of NEPP. CONCLUSION These findings of inhibition of iNOS and COX-2 mRNA expression through the suppression of NF-κB suggest that EPP and ENPP from blueberries have significant anti-inflammatory effect and may be a potential medicine. © 2015 Society of Chemical Industry.
Collapse
Affiliation(s)
- Anwei Cheng
- Institute of Agro-food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, 250100, China
- Key Laboratory of Agricultural Products Deep Processing Technology of Shandong
| | - Caijing Han
- Institute of Agro-food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, 250100, China
- Key Laboratory of Agricultural Products Deep Processing Technology of Shandong
| | - Xixiu Fang
- Nutrition and Biotechnology Research Center, Jiangsu Agriculture and Animal Husbandry College, Taizhou, 225300, China
| | - Jinyue Sun
- Institute of Agro-food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, 250100, China
- Key Laboratory of Agricultural Products Deep Processing Technology of Shandong
| | - Xiangyan Chen
- Institute of Agro-food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, 250100, China
- Key Laboratory of Agricultural Products Deep Processing Technology of Shandong
| | - Fachun Wan
- Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agriculture Sciences, Jinan, 250100, China
| |
Collapse
|
7
|
Expression of cyclooxygenase-2, 12-lipoxygenase, and inducible nitric oxide synthase in head and neck squamous cell carcinoma. J Craniofac Surg 2015; 24:1114-7. [PMID: 23851751 DOI: 10.1097/scs.0b013e31828f2491] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
AIM The objective of this study was to investigate whether cyclooxygenase-2 (COX-2), 12-lipoxygenase (12-LOX), and inducible nitric oxide synthase (iNOS) have a role in carcinogenesis of head and neck squamous cell carcinoma (HNSCC). MATERIALS AND METHODS Twenty-two patients with HNSCC were included in the study. Cancer tissues and adjacent normal mucosa were obtained from each patient. Real-time PCR was used to assess the expression of COX-2, 12-LOX, and iNOS. RESULTS COX-2 and 12-LOX mRNA expressions are significantly increased in HNSCC compared with adjacent normal mucosa. Expression of iNOS was not significantly elevated in overall head and neck cancer tissues compared with normal mucosa. However, iNOS expression was found to be significantly elevated in patients with laryngeal cancer. CONCLUSION These data suggest that COX-2 and 12-LOX may play a role in carcinogenesis of head and neck cancer. iNOS as well as COX-2 and 12-LOX may play a role in carcinogenesis of laryngeal cancer.
Collapse
|
8
|
Huo M, Gao R, Jiang L, Cui X, Duan L, Deng X, Guan S, Wei J, Soromou LW, Feng H, Chi G. Suppression of LPS-induced inflammatory responses by gossypol in RAW 264.7 cells and mouse models. Int Immunopharmacol 2013; 15:442-9. [DOI: 10.1016/j.intimp.2013.01.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 12/17/2012] [Accepted: 01/07/2013] [Indexed: 12/28/2022]
|
9
|
Davoine F, Sim A, Tang C, Fisher S, Ethier C, Puttagunta L, Wu Y, McGaw WT, Yu D, Cameron L, Adamko DJ, Moqbel R. Eosinophils in human oral squamous carcinoma; role of prostaglandin D2. JOURNAL OF INFLAMMATION-LONDON 2013; 10:4. [PMID: 23369060 PMCID: PMC3637094 DOI: 10.1186/1476-9255-10-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Accepted: 01/28/2013] [Indexed: 01/21/2023]
Abstract
Eosinophils are often predominant inflammatory leukocytes infiltrating oral squamous carcinoma (OSC) sites. Prostaglandins are secreted by oral carcinomas and may be involved in eosinophil infiltration. The objective of this study was to determine the factors contributing to eosinophil migration and potential anti-neoplastic effects on OSC. Eosinophil degranulation was evaluated by measuring release of eosinophil peroxidase (EPO). Eosinophil chemotaxis towards OSC cells was assessed using artificial basement membrane. Eosinophil infiltration was prominent within the tissue surrounding the OSC tumor mass. We observed growth inhibition of the OSC cell line, SCC-9, during co-culture with human eosinophils, in vitro, which correlated with EPO activity that possesses growth inhibitory activity. The PGD2 synthase inhibitor, HQL-79, abrogated migration towards SCC-9. Our data suggest that OSC-derived PGD2 may play an important role via CRTH2 (the PGD2 receptor on eosinophils) in eosinophil recruitment and subsequent anti-tumor activity through the action of eosinophil cationic proteins.
Collapse
Affiliation(s)
- Francis Davoine
- Pulmonary Research Group, University of Alberta, 559 Heritage Medical Research Centre, Edmonton, Alberta T6G 2S2, Canada.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Lee GH, Yoon YH, Kim YM, Yeo MK, Liang ZL, Kim JM, Rha KS. Pattern of expression of cyclooxygenase-2 in malignant transformation of sinonasal inverted papilloma. Am J Otolaryngol 2012; 33:585-9. [PMID: 22534023 DOI: 10.1016/j.amjoto.2012.03.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2012] [Revised: 03/05/2012] [Accepted: 03/11/2012] [Indexed: 10/28/2022]
Abstract
OBJECTIVE Cyclooxygenases (COXs) are enzymes that catalyze the conversion of arachidonic acid to prostaglandins. Many studies have suggested that COX-2, the inducible form of COX, is important in carcinogenesis. However, little is known about the pattern of expression of COX-2 in a multistep process of malignant transformation of sinonasal inverted papilloma (IP). In this study, we investigated COX-2 expression in IPs, IPs with dysplasia, IPs with squamous cell carcinoma (SCC), and primary SCCs of sinonasal tract. STUDY DESIGN A retrospective study was conducted. SETTING The setting was a tertiary care referral center. SUBJECTS AND METHODS The expression of COX-2 was evaluated by immunohistochemistry in 56, 7, 18, and 17 cases of IPs, IPs with dysplasia, IPs with SCC, and primary SCCs, respectively. Furthermore, we investigated the possible correlation between the expression of COX-2 and clinicopathologic variables in patients with IPs with SCC and primary SCC patients. RESULTS Positive immunoreactivity for COX-2 was observed in 3 (5.4%) of 56 IPs, 7 (38.9%) of 18 IPs with SCC, and 7 (41.2%) of 17 primary SCCs, whereas it was not observed in IPs with dysplasia. The percentage of tumors with COX-2-positive immunostaining was significantly higher in IPs with SCC and primary SCCs compared with benign IPs. There was no significant correlation between the expression of COX-2 and clinicopathologic variables, such as tumor stage, histologic differentiation, and the proportion of malignant areas in patients with IPs with SCC. CONCLUSION Cyclooxygenase-2 may play an important role in the process of malignant transformation from IP to SCC.
Collapse
|
11
|
Sayar C, Sayar H, Özdemir S, Selçuk T, Görgülü O, Akbaş Y, Kemal Olgun M. Cyclooxygenase-2 expression and clinical parameters in laryngeal squamous cell carcinoma, vocal fold nodule, and laryngeal atypical hyperplasia. Head Neck 2012; 35:52-6. [PMID: 22247036 DOI: 10.1002/hed.22911] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/02/2011] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND The diagnostic role of cyclooxygenase-2 (COX-2) expression in laryngeal atypical hyperplasia, vocal fold nodule, and laryngeal squamous cell carcinoma was examined. METHODS Specimens obtained from patients diagnosed with vocal fold nodule (n = 35), atypical hyperplasia (n = 35), laryngeal squamous cell carcinoma (n = 35), and clinical parameters were evaluated retrospectively. RESULTS Although no staining was observed in patients with vocal fold nodules, staining was noted in laryngeal atypical hyperplasia and squamous cell carcinoma. The percentage of COX-2 staining was the highest in the carcinoma group. CONCLUSION It was determined that COX-2 staining was significantly associated with laryngeal squamous cell carcinoma. It should be noted that overexpression of COX-2, a potentially important factor in the evolution of carcinogenesis in precancerous lesions, might be an indicator of the development of carcinoma.
Collapse
Affiliation(s)
- Cağdaş Sayar
- Kahramanmaras State Hospital, Department of Otolaryngology - Head and Neck Surgery, Kahramanmaras, Turkey
| | | | | | | | | | | | | |
Collapse
|
12
|
4′-Bromo-5,6,7-trimethoxyflavone represses lipopolysaccharide-induced iNOS and COX-2 expressions by suppressing the NF-κB signaling pathway in RAW 264.7 macrophages. Bioorg Med Chem Lett 2012; 22:700-5. [DOI: 10.1016/j.bmcl.2011.10.067] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2011] [Revised: 10/10/2011] [Accepted: 10/12/2011] [Indexed: 01/30/2023]
|
13
|
R-flurbiprofen, a novel nonsteroidal anti-inflammatory drug, decreases cell proliferation and induces apoptosis in pituitary adenoma cells in vitro. J Neurooncol 2011; 106:561-9. [DOI: 10.1007/s11060-011-0712-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Accepted: 09/12/2011] [Indexed: 12/21/2022]
|
14
|
Hou DX, Masuzaki S, Tanigawa S, Hashimoto F, Chen J, Sogo T, Fujii M. Oolong tea theasinensins attenuate cyclooxygenase-2 expression in lipopolysaccharide (LPS)-activated mouse macrophages: structure-activity relationship and molecular mechanisms. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:12735-12743. [PMID: 21082860 DOI: 10.1021/jf103605j] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Oolong tea theasinensins are a group of tea polyphenols different from green tea catechins and black tea theaflavins. The present study reports the inhibitory effects of oolong tea theasinensins on the expression of cyclooxygenase-2 (COX-2) and underlying molecular mechanisms in lipopolysaccharide (LPS)-activated murine macrophage RAW264 cells. The structure-activity data revealed that the galloyl moiety of theasinensins played an important role in the inhibitory actions. Theasinensin A, a more potent inhibitor, caused a dose-dependent inhibition of mRNA, protein, and promoter activity of COX-2. An electrophoretic mobility shift assay (EMSA) revealed that theasinensin A reduced the complex of NF-κB- and AP-1-DNA in the promoter of COX-2. Signaling analysis demonstrated that theasinensin A attenuated IκB-α degradation, nuclear p65 accumulation, and c-Jun phosphorylation. Furthermore, theasinensin A suppressed the phosphorylation of MAPKs, IκB kinase α/β (IKKα/β), and TGF-β activated kinase (TAK1). These data demonstrated that the down-regulation of TAK1-mediated MAPKs and NF-κB signaling pathways might be involved in the inhibition of COX-2 expression by theasinensin A. These findings provide the first molecular basis for the anti-inflammatory properties of oolong tea theasinensins.
Collapse
Affiliation(s)
- De-Xing Hou
- Department of Biochemical Science and Technology, United Graduate School of Agricultural SciencesKagoshima University, Korimoto 1-21-24, Kagoshima City, 890-0065 Japan.
| | | | | | | | | | | | | |
Collapse
|
15
|
Rouxel AM, Le Toux G, Misery L. Tacrolimus en bains de bouche dans le traitement de seconde intention du lichen plan buccal érosif. Ann Dermatol Venereol 2010; 137:648-9. [DOI: 10.1016/j.annder.2010.06.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2009] [Revised: 05/28/2010] [Accepted: 06/22/2010] [Indexed: 10/19/2022]
|
16
|
Koontongkaew S, Monthanapisut P, Saensuk T. Inhibition of arachidonic acid metabolism decreases tumor cell invasion and matrix metalloproteinase expression. Prostaglandins Other Lipid Mediat 2010; 93:100-8. [PMID: 20654727 DOI: 10.1016/j.prostaglandins.2010.07.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Revised: 06/30/2010] [Accepted: 07/15/2010] [Indexed: 12/21/2022]
Abstract
Head and neck cancers are known to synthesize arachidonic acid metabolites. Interfering with arachidonic acid metabolism may inhibit growth and invasiveness of cancer cells. In this study we investigate effects of sulindac (the non-selective COX inhibitor), aspirin (the irreversible, preferential COX-1 inhibitor), NS-398 (the selective COX-2 inhibitor), NDGA (nordihydroguaiaretic acid, the selective LOX inhibitor) and ETYA (5,8,11,14-eicosatetraynoic acid, the COX and LOX inhibitor) on cell viability, MMP-2 and MMP-9 activities, and in vitro invasion of cancer cells derived from primary and metastatic head and neck, and colon cancers. The inhibitors of COX and/or LOX could inhibit cell proliferation, MMP activity and invasion in head and neck and colon cancer cells. However, the inhibitory effect was obviously observed in colon cancer cells. Inhibition of arachidonic acid metabolism caused a decrease in cancer cell motility, which partially explained by the inhibition of MMPs. Therefore, COX and LOX pathways play important roles in head and neck cancer cell growth.
Collapse
Affiliation(s)
- Sittichai Koontongkaew
- Oral Biology Laboratory, Faculty of Dentistry, Thammasat University, Praholyothin Road, Klong Luang, Pratum-Tani 12120, Thailand.
| | | | | |
Collapse
|
17
|
Prado SMD, Cedrún JLL, Rey RL, Villaamil VM, García AA, Ayerbes MV, Aparicio LA. Evaluation of COX-2, EGFR, and p53 as biomarkers of non-dysplastic oral leukoplakias. Exp Mol Pathol 2010; 89:197-203. [PMID: 20599939 DOI: 10.1016/j.yexmp.2010.06.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2009] [Revised: 06/12/2010] [Accepted: 06/12/2010] [Indexed: 10/19/2022]
Abstract
OBJECTIVE Identify candidate SEBs (surrogate endpoint biomarkers) for premalignant trends in head and neck mucosa. STUDY DESIGN Study, by qPCR (quantitative real-time polymerase chain reaction), the expression of COX-2, EGFR and p53 in 24 biopsies of non-dysplastic oral leukoplakia and contra-lateral normal-appearing mucosa. RESULTS COX-2 was up-regulated in leukoplakia (79.2%); whereas EGFR and p53 were up-regulated (p>0.05) in oral contra-lateral normal-appearing mucosa (60% and 46% respectively). Also, p53 expression was correlated with tobacco smoke habits and Spearman's rank correlation coefficient showed a positive linear correlation between p53 and EGFR mRNA expression levels. CONCLUSIONS COX-2 would serve as SEB of oral leukoplakia. The results suggest that p53 appears to be one of the molecular targets of tobacco-related carcinogens in leukoplakia and that the co-expression of p53 and EGFR may play a role in this kind of oral pre-cancerous lesion. More detailed studies of EGFR and p53 should be continued in the future.
Collapse
|
18
|
Shin JS, Park YM, Choi JH, Park HJ, Shin MC, Lee YS, Lee KT. Sulfuretin isolated from heartwood of Rhus verniciflua inhibits LPS-induced inducible nitric oxide synthase, cyclooxygenase-2, and pro-inflammatory cytokines expression via the down-regulation of NF-kappaB in RAW 264.7 murine macrophage cells. Int Immunopharmacol 2010; 10:943-50. [PMID: 20546946 DOI: 10.1016/j.intimp.2010.05.007] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Revised: 05/08/2010] [Accepted: 05/16/2010] [Indexed: 01/05/2023]
Abstract
It has been reported that Rhusverniciflua exhibits anti-inflammatory, anti-oxidant and anti-cancer activities. However, little is known about biological activity of sulfuretin, a flavonoid isolated from R.verniciflua. In the present study, we investigated the anti-inflammatory effect and the underlying molecular mechanisms of sulfuretin in lipopolysaccharide (LPS)-induced RAW 264.7 cells. Sulfuretin dose-dependently reduced the productions of nitric oxide (NO), prostaglandin E(2) (PGE(2)), tumor necrosis factor-alpha (TNF-alpha), and interleukin-1 beta (IL-1 beta) induced by LPS. Consistent with these findings, sulfuretin significantly suppressed the LPS-induced expressions of inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), TNF-alpha, and IL-1 beta. In addition, sulfuretin attenuated LPS-induced DNA binding and the transcriptional activities of nuclear factor-kappa B (NF-kappaB), which was accompanied by a parallel reduction of degradation and phosphorylation of inhibitory kappa B-alpha (I kappaB-alpha) and consequently by decreased nuclear translocation of p65 subunit of NF-kappaB. Furthermore, pretreatment with sulfuretin significantly inhibited the LPS-stimulated activation of I kappaB kinase beta (IKK beta). Taken together, these results suggest that the anti-inflammatory effect of sulfuretin in LPS-treated RAW 264.7 macrophages is associated with the suppression of NF-kappaB transcriptional activity via the inhibitory regulation of IKKbeta phosphorylation.
Collapse
Affiliation(s)
- Ji-Sun Shin
- Department of Pharmaceutical Biochemistry, College of Pharmacy, Kyung Hee University, Seoul, Republic of Korea
| | | | | | | | | | | | | |
Collapse
|
19
|
Menghini L, Genovese S, Epifano F, Tirillini B, Ferrante C, Leporini L. Antiproliferative, Protective and Antioxidant Effects of Artichoke, Dandelion, Turmeric and Rosemary Extracts and Their Formulation. Int J Immunopathol Pharmacol 2010; 23:601-10. [DOI: 10.1177/039463201002300222] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Artichoke, dandelion, turmeric extracts and rosemary essential oil are commonly used as ingredients in many herbal preparations to treat hepatic and gallbladder disorders. In the present work we compare the activity of each single extract with a commercial mixture for antiproliferative, antiradical and protective effects against induced oxidant stress effect. In ABTS and DPPH tests, turmeric extract is the most active, followed by artichoke and dandelion. All samples exhibited antiproliferative activity in a dose-dependent manner against HepG2 cells. In the same cell lines, the protective effect of pre-treatment with the extracts were detected by evaluating the prostaglandin E2 release, a marker of oxidative stress induced by hydrogen peroxide. The treatments with the extracts were efficient in reducing the release of PGE2 induced by oxidative stimulus. The positive results of the cell viability test, together with the protective and antiradical activity confirm the rationale for the use of these ingredients in commercial formulations as a health aid tool in modern phytotherapy.
Collapse
Affiliation(s)
| | | | | | - B. Tirillini
- Istituto di Botanica ed Orto Botanico, Università di Urbino, Urbino, Italy
| | | | | |
Collapse
|
20
|
Inhibitory effect of 3-caffeoyl-4-dicaffeoylquinic acid from Salicornia herbacea against phorbol ester-induced cyclooxygenase-2 expression in macrophages. Chem Biol Interact 2010; 183:397-404. [DOI: 10.1016/j.cbi.2009.11.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2009] [Revised: 11/11/2009] [Accepted: 11/16/2009] [Indexed: 01/05/2023]
|
21
|
Han EH, Hwang YP, Kim HG, Park JH, Jeong TC, Jeong HG. Upregulation of cyclooxygenase-2 by 4-nonylphenol is mediated through the cyclic amp response element activation pathway. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART A 2010; 73:1451-1464. [PMID: 20954072 DOI: 10.1080/15287394.2010.511551] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The organic compound nonylphenol (NP) belongs to the family of alkylphenols and is a product of industrial synthesis formed during phenol alkylation. Nonylphenol is considered to be an endocrine disruptor due to weak ability to mimic estrogen and subsequently to disrupt the natural balance of hormones in a given organism. Since the endocrine and immune systems share portions of common signaling pathways, it is conceivable that NP may also affect immune system functions. However, the influence of NP on inflammation and macrophages responsiveness to NP is unclear. Thus, the effects of NP were investigated on cyclooxygenase (COX)-2 expression in cultured macrophages. NP induced COX-2 protein and gene expression in murine macrophage RAW264.7 cells and enhanced COX-2 promoter activity and prostaglandin E(2) production. Transfection of RAW264.7 cells with hCOX-2 or various deletion and mutation promoter constructs revealed that the cyclic AMP response element (CRE) was the predominant mediator responsive to NP-induced effects. Moreover, transfection with pCRE-Luc plasmid followed by immunoblotting demonstrated that NP activated CRE sites and CRE binding protein (CREB) phosphorylation. NP also increased nuclear CREB accumulation and CREB binding to the COX-2 promoter. Phosphatidylinositol 3 (PI3)-kinase, Akt, and the mitogen-activated protein kinases (MAP kinases) p38 and JNK were also significantly activated by NP. Our data demonstrate that NP induces COX-2 expression through the PI3-kinase/Akt/MAP kinases/CRE pathway. These findings provide insight into the signal transduction pathways involved in the inflammatory responses induced by NP in macrophages.
Collapse
Affiliation(s)
- Eun Hee Han
- Department of Toxicology, College of Pharmacy, Chungnam National University, Daejeon, South Korea
| | | | | | | | | | | |
Collapse
|
22
|
de Vos JP, Burm AGD, Focker AP, Boschloo H, Karsijns M, van der Waal I. Piroxicam and carboplatin as a combination treatment of canine oral non-tonsillar squamous cell carcinoma: a pilot study and a literature review of a canine model of human head and neck squamous cell carcinoma. Vet Comp Oncol 2009; 3:16-24. [PMID: 19379210 DOI: 10.1111/j.1476-5810.2005.00065.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Results of the treatment with a combination of carboplatin and piroxicam in seven dogs with advanced non-tonsillar oral squamous cell carcinoma (SCC) were retrospectively analysed. This multi-agent protocol was well tolerated by all dogs and resulted in a complete regression of the tumour without additional surgery in four of seven patients. Additional surgery was necessary to remove a metastatic lymph node in one dog and residual tumour in a second dog, which achieved a partial response following medical therapy. Median follow-up for all the dogs was 534 days, while the time-to-recurrence, time-to-progression and overall survival for this group of patients have not yet been reached. Our study, although limited in number of animals, suggests that this multiagent approach is a useful treatment option for oral non-tonsillar SCC in dogs and warrants wider application.
Collapse
Affiliation(s)
- J P de Vos
- De Ottenhorst, clinic for companion animal medicine, Terneuzen, The Netherlands.
| | | | | | | | | | | |
Collapse
|
23
|
Arun P, Brown MS, Ehsanian R, Chen Z, Van Waes C. Nuclear NF-kappaB p65 phosphorylation at serine 276 by protein kinase A contributes to the malignant phenotype of head and neck cancer. Clin Cancer Res 2009; 15:5974-84. [PMID: 19789307 DOI: 10.1158/1078-0432.ccr-09-1352] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Aberrant nuclear activation and phosphorylation of the canonical NF-kappaB subunit RELA/p65 at Serine-536 by inhibitor kappaB kinase is prevalent in head and neck squamous cell carcinoma (HNSCC), but the role of other kinases in NF-kappaB activation has not been well defined. Here, we investigated the prevalence and function of p65-Ser276 phosphorylation by protein kinase A (PKA) in the malignant phenotype and gene transactivation, and studied p65-Ser276 as a potential target for therapy. EXPERIMENTAL DESIGN Phospho and total p65 protein expression and localization were determined in HNSCC tissue array and in cell lines. The effects of the PKA inhibitor H-89 on NF-kappaB activation, downstream gene expression, cell proliferation and cell cycle were examined. Knockdown of PKA by specific siRNA confirmed the specificity. RESULTS NF-kappaB p65 phosphorylated at Ser276 was prevalent in HNSCC and adjacent dysplastic mucosa, but localized to the cytoplasm in normal mucosa. In HNSCC lines, tumor necrosis factor-alpha (TNF-alpha) significantly increased, whereas H-89 inhibited constitutive and TNF-alpha-induced nuclear p65 (Ser276) phosphorylation, and significantly suppressed NF-kappaB and target gene IL-8 reporter activity. Knockdown of PKA by small interfering RNA inhibited NF-kappaB, IL-8, and BCL-XL reporter gene activities. H-89 suppressed cell proliferation, induced cell death, and blocked the cell cycle in G(1)-S phase. Consistent with its biological effects, H-89 down-modulated expression of NF-kappaB-related genes Cyclin D1, BCL2, BCL-XL, COX2, IL-8, and VEGF, as well as induced cell cycle inhibitor p21(CIP1/WAF1), while suppressing proliferative marker Ki67. CONCLUSIONS NF-kappaB p65 (Ser276) phosphorylation by PKA promotes the malignant phenotype and holds potential as a therapeutic target in HNSCC.
Collapse
Affiliation(s)
- Pattatheyil Arun
- Tumor Biology Section, Head and Neck Surgery Branch, National Institute on Deafness and Other Communication Disorders, NIH, Bethesda, Maryland 20892-0001, USA
| | | | | | | | | |
Collapse
|
24
|
Phosphorylated epidermal growth factor receptor and cyclooxygenase-2 expression in localized non-small cell lung cancer. Med Oncol 2009; 27:91-7. [PMID: 19235531 DOI: 10.1007/s12032-009-9178-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2008] [Accepted: 02/03/2009] [Indexed: 01/02/2023]
Abstract
PURPOSE The prognostic significance of epidermal growth factor receptor (EGFR) and cyclooxygenase-2 (COX-2) expression remains unestablished, although EGFR and COX-2 are frequently overexpressed in non-small cell lung cancer (NSCLC). Considering the importance of EGFR activation after ligand binding, however, the expression of phosphorylated EGFR (p-EGFR) may have more significance in predicting tumor aggressiveness in NSCLC than either EGFR or COX-2 expression. PATIENTS AND METHODS We studied the relationships between p-EGFR, EGFR, and COX-2 overexpression and examined their association with prognosis in localized NSCLC. The expression of p-EGFR, EGFR, and COX-2 was studied by immunohistochemistry in 77 surgically-resected stage I/II NSCLC cases. EGFR mutational status was determined by sequencing exons 18-21. Correlation of expression with clinical outcome and other biomarkers, including Ki-67 and microvessel density (MVD), was also examined. RESULTS Out of the 77 patients, EGFR overexpression was observed in 37 (48.1%), p-EGFR expression was found in 22 (28.6%), and COX-2 overexpression was seen in 45 (58.4%). Expression of p-EGFR was associated with COX-2 overexpression (P = 0.047), but not EGFR overexpression or high Ki-67 (P = 0.087 and P = 0.092, respectively). COX-2 overexpression was significantly associated with high Ki-67 (P = 0.011). Expression of p-EGFR correlated with lower disease-free survival (P = 0.045), but not overall survival. Neither EGFR nor COX-2 overexpression was associated with prognosis. CONCLUSION p-EGFR appears to be a better indicator for lower disease-free survival than EGFR overexpression itself in localized NSCLC. Pathways other than EGFR activation may influence COX-2 overexpression.
Collapse
|
25
|
Bode A, Dong Z. Modulation of Cell Signal Transduction by Tea and Ginger. OXIDATIVE STRESS AND DISEASE 2008. [DOI: 10.1201/9780849381492.ch2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/06/2022]
|
26
|
Overexpression of COX-2 gene in oral cancer is independent of stage of disease and degree of differentiation. Int J Oral Maxillofac Surg 2008; 37:379-83. [DOI: 10.1016/j.ijom.2008.01.004] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2007] [Revised: 08/19/2007] [Accepted: 01/11/2008] [Indexed: 11/21/2022]
|
27
|
Ekspresja niektórych molekularnych markerów immunohistochemicznych i ocena ich znaczenia prognostycznego w rakach płaskonabłonkowych jamy ustnej i wargi. Otolaryngol Pol 2008; 62:175-81. [DOI: 10.1016/s0030-6657(08)70236-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
28
|
Molinolo AA, Hewitt SM, Amornphimoltham P, Keelawat S, Rangdaeng S, Meneses García A, Raimondi AR, Jufe R, Itoiz M, Gao Y, Saranath D, Kaleebi GS, Yoo GH, Leak L, Myers EM, Shintani S, Wong D, Massey HD, Yeudall WA, Lonardo F, Ensley J, Gutkind JS. Dissecting the Akt/mammalian target of rapamycin signaling network: emerging results from the head and neck cancer tissue array initiative. Clin Cancer Res 2007; 13:4964-73. [PMID: 17785546 DOI: 10.1158/1078-0432.ccr-07-1041] [Citation(s) in RCA: 179] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE As an approach to evaluate the expression pattern and status of activation of signaling pathways in clinical specimens from head and neck squamous cell carcinoma (HNSCC) patients, we established the Head and Neck Cancer Tissue Array Initiative, an international consortium aimed at developing a high-density HNSCC tissue microarray, with a high representation of oral squamous cell carcinoma. EXPERIMENTAL DESIGN These tissue arrays were constructed by acquiring cylindrical biopsies from multiple individual tumor tissues and transferring them into tissue microarray blocks. From a total of 1,300 cases, 547 cores, including controls, were selected and used to build the array. RESULTS Emerging information by the use of phosphospecific antibodies detecting the activated state of signaling molecules indicates that the Akt-mammalian target of rapamycin (mTOR) pathway is frequently activated in HNSCC, but independently from the activation of epidermal growth factor receptor or the detection of mutant p53. Indeed, we identified a large group of tissue samples displaying active Akt and mTOR in the absence of epidermal growth factor receptor activation. Furthermore, we have also identified a small subgroup of patients in which the mTOR pathway is activated but not Akt, suggesting the existence of an Akt-independent signaling route stimulating mTOR. CONCLUSIONS These findings provide important information about the nature of the dysregulated signaling networks in HNSCC and may also provide the rationale for the future development of novel mechanism-based therapies for HNSCC patients.
Collapse
Affiliation(s)
- Alfredo A Molinolo
- Oral and Pharyngeal Cancer Branch, National Institute of Dental and Craniofacial Research, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland 20892-4330, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Hou DX, Luo D, Tanigawa S, Hashimoto F, Uto T, Masuzaki S, Fujii M, Sakata Y. Prodelphinidin B-4 3'-O-gallate, a tea polyphenol, is involved in the inhibition of COX-2 and iNOS via the downregulation of TAK1-NF-kappaB pathway. Biochem Pharmacol 2007; 74:742-51. [PMID: 17658484 DOI: 10.1016/j.bcp.2007.06.006] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2007] [Revised: 05/25/2007] [Accepted: 06/07/2007] [Indexed: 01/11/2023]
Abstract
Much is known about the bioactive properties of green tea flavan-3-ol. However, very little work has been done to determine the properties of proanthocyanidins, another kind of polyphenols in green tea. In this study, we have investigated the anti-inflammatory effect of tea prodelphinidin B-4 3'-O-gallate (PDG) by demonstrating the inhibitory effects on cyclooxygenase-2 (COX-2) and inducible nitric oxide synthase (iNOS) in lipopolysaccharide (LPS)-activated murine macrophage RAW264 cells. PDG caused a dose-dependent inhibition of COX-2 and iNOS at both mRNA and protein levels with the attendant decrease of prostaglandin E2 (PGE2) and nitric oxide (NO) production. Molecular data revealed that PDG downregulated NF-kappaB signaling pathway. Electrophoretic mobility shift assay (EMSA) showed that PDG reduced the binding complex of NF-kappaB-DNA in the promoter of COX-2 and iNOS. Immunochemical analysis revealed that PDG suppressed LPS-induced phosphorylation and degradation of IkappaBalpha, and subsequent nuclear translocation of p65. Consequently, PDG suppressed phosphorylation of IkappaB kinase alpha/beta (IKKalpha/beta) and TGF-beta-activated kinase (TAK1). Taken together, our data indicated that PDG is involved in the inhibition of COX-2 and iNOS via the downregulation of TAK1-NF-kappaB pathway, revealing partial molecular basis for the anti-inflammatory properties of tea PDG.
Collapse
Affiliation(s)
- De-Xing Hou
- Department of Biochemical Science and Technology, Faculty of Agriculture, Kagoshima University, Korimoto 1-21-24, Kagoshima City 890-0065, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
30
|
Cabay RJ, Morton TH, Epstein JB. Proliferative verrucous leukoplakia and its progression to oral carcinoma: a review of the literature. J Oral Pathol Med 2007; 36:255-61. [PMID: 17448134 DOI: 10.1111/j.1600-0714.2007.00506.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
BACKGROUND Proliferative verrucous leukoplakia (PVL) is a distinct clinical form of oral leukoplakia defined by its progressive clinical course, changing clinical and histopathological features, and potential to develop into cancer. PVL behaves in a more aggressive and relentless manner than the more innocuous white oral lesions that it can resemble clinically. METHODS A PubMed search was conducted which identified studies that examined patients with PVL and reported data meeting inclusion criteria. RESULTS PVL is seen much more frequently in females and most often diagnosed after the sixth decade of life. Tobacco use is not strongly linked to the presence of PVL (63% of patients did not use tobacco products). Most (74%) of the patients with PVL progressed to oral carcinoma. CONCLUSION PVL is a persistent and progressive oral lesion that requires very close follow-up along with early and aggressive treatment to increase the chances of a favorable outcome.
Collapse
Affiliation(s)
- Robert J Cabay
- Department of Pathology, College of Medicine, University of Illinois at Chicago, Chicago, IL 60612-7213, USA
| | | | | |
Collapse
|
31
|
Hou DX, Masuzaki S, Hashimoto F, Uto T, Tanigawa S, Fujii M, Sakata Y. Green tea proanthocyanidins inhibit cyclooxygenase-2 expression in LPS-activated mouse macrophages: molecular mechanisms and structure-activity relationship. Arch Biochem Biophys 2007; 460:67-74. [PMID: 17313938 DOI: 10.1016/j.abb.2007.01.009] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2006] [Revised: 12/27/2006] [Accepted: 01/05/2007] [Indexed: 01/22/2023]
Abstract
The inhibitory effects of green tea proanthocyanidins on cyclooxygenase-2 (COX-2) expression and prostaglandin E(2) (PGE(2)) release were investigated in lipopolysaccharide (LPS)-activated murine macrophage RAW264 cells. Prodelphinidin B2 3,3' di-O-gallate (PDGG) caused a dose-dependent inhibition of COX-2 at both mRNA and protein levels with the attendant release of PGE(2). Molecular evidence revealed that PDGG inhibited the degradation of Ikappa-B, nuclear translocation of p65 and CCAAT/enhancer-binding protein (C/EBP)delta, and phosphorylation of c-Jun, but not CRE-binding protein (CREB), which regulate COX-2 expression. Moreover, PDGG suppressed the activations of mitogen-activated protein kinase (MAPK) including c-Jun NH(2)-terminal kinase (JNK), extracellular signal-regulated kinase (ERK) and p38 kinase. The results demonstrated that PDGG suppressed COX-2 expression via blocking MAPK-mediated activation of nuclear factor-kappaB (NF-kappaB), activator protein-1 (AP-1) and C/EBPdelta. Furthermore, studies on structure-activity relationship using five kinds of proanthocyanidins revealed that the galloyl moiety of proanthocyanidins appeared important to their inhibitory actions. Thus, our findings provide the first molecular basis that green tea proanthocyanidins with the galloyl moiety might have anti-inflammatory properties through blocking MAPK-mediated COX-2 expression.
Collapse
Affiliation(s)
- De-Xing Hou
- Department of Biochemical Science and Technology, Kagoshima University, Korimoto 1-21-24, Kagoshima City 890-0065, Japan.
| | | | | | | | | | | | | |
Collapse
|
32
|
Wang D, Chen S, Feng Y, Yang Q, Campbell BH, Tang X, Campbell WB. Reduced expression of 15-lipoxygenase 2 in human head and neck carcinomas. Tumour Biol 2006; 27:261-73. [PMID: 16874012 DOI: 10.1159/000094761] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2005] [Accepted: 01/30/2006] [Indexed: 11/19/2022] Open
Abstract
Nonsteroidal anti-inflammatory drugs (NSAIDs) have demonstrated cancer chemoprevention effects associated with their ability to modulate polyunsaturated fatty acid metabolism. In the present study, we report a significant reduction of 15-lipoxygenase 2 (15-LOX-2) in seven carcinoma cell lines of the human head and neck when compared with normal primary cultured keratinocytes, and 18 primary head and neck squamous cell carcinomas (HNSCC) when compared with matched normal mucosa. 15-LOX-2 is mainly expressed in the mature cells of the benign squamous epithelium, but not in the basal layer cells of benign epithelium, suggesting a role of 15-LOX-2 in cell differentiation. We further found that 15-lipoxygenase activity was reduced in carcinoma cells when compared with normal primary cultured keratinocytes. When the effects of NSAIDs were examined on cell proliferation and regulation of 15-LOX-2 in the carcinoma cells, NS398 treatment resulted in significant growth inhibition associated with upregulation of 15-LOX-2 and its major metabolite 15-S-HETE. Finally, restoration of 15-LOX-2 expression into these carcinoma cells significantly inhibited cell proliferation. Our results demonstrate that 15-LOX-2 expression is significantly reduced and this reduction may promote proliferation in human head and neck carcinoma. 15-LOX-2 may be a possible biomarker in human head and neck malignancy.
Collapse
Affiliation(s)
- Dian Wang
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisc., USA.
| | | | | | | | | | | | | |
Collapse
|
33
|
Divya CS, Pillai MR. Antitumor action of curcumin in human papillomavirus associated cells involves downregulation of viral oncogenes, prevention of NFkB and AP-1 translocation, and modulation of apoptosis. Mol Carcinog 2006; 45:320-32. [PMID: 16526022 DOI: 10.1002/mc.20170] [Citation(s) in RCA: 152] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Curcumin (diferuloyl methane), the major yellow pigment from the rhizomes of turmeric (Curcuma longa Linn), has anticancer properties. Infection with high-risk human papillomaviruses (HPV) leads to development of cervical carcinoma, predominantly through the action of viral oncoproteins E6 and E7. The present study aims at analyzing the antitumor and antiviral properties of curcumin, on HPV associated cervical cancer cells. Our findings indicate curcumin to be cytotoxic to cervical cancer cells in a concentration-dependent and time-dependent manner. The cytotoxic activity was selectively more in HPV16 and HPV18 infected cells compared to non-HPV infected cells. Balance between tumor cell proliferation and spontaneous cell death via apoptosis had an important role in regulation of tumor cell growth. Curcumin-induced apoptosis in cervical cancer cells. Morphological hallmarks of apoptosis such as nuclear fragmentation and internucleosomal fragmentation of DNA were observed. Curcumin also selectively inhibited expression of viral oncogenes E6 and E7, evident from RT-PCR and Western blotting data. Electrophoretic mobility shift assay revealed that activation of NFkappaB-induced by TNFalpha is down regulated by curcumin. Curcumin blocked IkBalpha phosphorylation and degradation, leading to abrogation of NFkappaB activation. Curcumin also down regulated the expression of COX-2, a gene regulated by NFkappaB. Binding of AP-1, an indispensable component for efficient epithelial tissue-specific gene expression of HPV was also selectively down regulated by curcumin. These results provide attractive data for the possible use of curcumin in the management of HPV associated tumors.
Collapse
Affiliation(s)
- Chandrasekhar S Divya
- Department of Molecular Medicine, Regional Cancer Centre, Thiruvananthapuram, Kerala, India
| | | |
Collapse
|
34
|
Mernitz H, Smith DE, Zhu AX, Wang XD. 9-cis-Retinoic acid inhibition of lung carcinogenesis in the A/J mouse model is accompanied by increased expression of RAR-beta but no change in cyclooxygenase-2. Cancer Lett 2006; 244:101-8. [PMID: 16413115 DOI: 10.1016/j.canlet.2005.12.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2005] [Accepted: 12/04/2005] [Indexed: 11/30/2022]
Abstract
9-cis-Retinoic acid (9cRA) binds both retinoic acid receptors (RARs) and retinoid X receptors (RXRs) and has been shown to be a potential chemopreventive agent both in lung cancer cell culture studies and in clinical trials studying former smokers. However, direct evidence of the efficacy of 9cRA against lung tumor development in vivo is lacking. In the present study, we determined whether treatment with 9cRA has the potential to inhibit lung carcinogenesis by upregulating RAR-beta and down-regulating COX-2 expression in the A/J mouse lung cancer model. A/J mice (n=14-15/group) were treated as follows: (1) Control (Sham treated); (2) NNK (100mg NNK/kg body weight); (3) NNK+9cRA (15mg/kg diet); and (4) NNK+celecoxib (a COX-2-specific inhibitor, 500mg/kg diet). Tumor incidence, tumor multiplicity, RAR-beta mRNA, COX-2 mRNA, and COX-2 protein levels in lung samples of mice were determined 4 months after carcinogen injection. The results showed that mice receiving 9cRA supplementation had significantly lower tumor multiplicity (48% reduction, P<0.05) and showed a trend toward lower tumor incidence (40% reduction, P=0.078), as compared with the mice given NNK alone. Although, celecoxib treatment resulted in greater declines in tumor incidence and tumor multiplicity (75 and 88%, respectively, P<0.05), the chemoprotective effects of celecoxib were accompanied by increased mortality while 9cRA treatment resulted in no weight-loss associated toxicity or mortality. Supplementation with 9cRA was effective in increasing RAR-beta mRNA, but this increase was not accompanied by decreased levels of COX-2 mRNA or protein. These results suggest that 9cRA supplementation may provide protection against lung carcinogenesis and this effect may be mediated in part by 9cRA induction of RAR-beta, but not inhibition of COX-2 transcription.
Collapse
Affiliation(s)
- Heather Mernitz
- Nutrition and Cancer Biology Laboratory, Jean Mayer United States Department of Agriculture Human Nutrition Research Center on Aging at Tufts University, 711 Washington Street, Boston, MA 02111, USA
| | | | | | | |
Collapse
|
35
|
Spink M, Bann S, Glickman R. Clinical implications of cyclo-oxygenase-2 inhibitors for acute dental pain management: benefits and risks. J Am Dent Assoc 2005; 136:1439-48. [PMID: 16255470 DOI: 10.14219/jada.archive.2005.0059] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
UNLABELLED BACKGROUND; Cyclo-oxygenase-2 inhibitors (COX-2i) demonstrate analgesic efficacy for patients who require gastrointestinal safety. The authors discuss the potential benefits and risks of these novel, but expensive, analgesics when used in dentistry. METHODS The authors conducted a MEDLINE search focused on the subject headings of common analgesic drugs and COX-2i, using peer-reviewed journals limited to the English language. They selected for review 127 articles that met the criteria. They also tried to identify any randomized controlled trials pertinent to dentistry and indicative of evidence-based medicine. RESULTS. When comparing COX isoforms (COX-1 and COX-2), the authors found that overlapping and mutually exclusively properties coexist. COX-2i originally were developed to minimize interference with the gastroprotective properties of the COX-1 isoform, while selectively preventing prostanoid synthesis expressed solely at sites of bodily trauma or other inflammation. COX-2i were found to provide pain relief equal to or slightly exceeding that offered by many mild narcotics. They may avoid some of the serious side effects that can occur with even short-term use of nonselective nonsteroidal anti-inflammatory drugs. CONCLUSIONS The pharmacodynamics of COX-2i reveal an agent that includes analgesic, anti-inflammatory and gastroprotective properties but also allows for an undesirable disruption of the delicate hemodynamic balance. CLINICAL IMPLICATIONS Symptomatic and asymptomatic gastroparietic patients who do not have severe cardiovascular, cerebral or renal ischemic disease benefit from use of COX-2i. Long-term use of these agents in medically compromised patients may prove disastrous.
Collapse
Affiliation(s)
- Michael Spink
- Department of Oral and Maxillofacial Surgery, Bellevue Hospital, New York, NY 10016, USA.
| | | | | |
Collapse
|
36
|
Choe MS, Zhang X, Shin HJC, Shin DM, Chen ZG. Interaction between epidermal growth factor receptor– and cyclooxygenase 2–mediated pathways and its implications for the chemoprevention of head and neck cancer. Mol Cancer Ther 2005; 4:1448-55. [PMID: 16170038 DOI: 10.1158/1535-7163.mct-04-0251] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Head and neck squamous cell carcinoma is a well-known model for chemoprevention studies because of its field cancerization effect, its multistep carcinogenesis process, and the easy accessibility of biopsies to target lesions. With new understandings of head and neck carcinogenesis and the development of molecular targeted therapy, chemoprevention trials for head and neck squamous cell carcinoma have been rapidly updated. Cyclooxygenase-2 (COX-2) and epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors are gaining significant attention as potential chemopreventive agents. Both COX-2 and EGFR are involved in head and neck carcinogenesis. Targeting COX-2 and EGFR separately has shown promising antitumor activity. Recently, combinations of COX-2 and EGFR tyrosine kinase inhibitors have been reported to show synergistic/additive effects in preclinical studies. Because COX-2 and EGFR tyrosine kinase inhibitors are toxic as single agents in clinical trials, the combination of COX-2 and EGFR tyrosine kinase inhibitors used at lower doses seems more promising than monotherapy with either as a novel strategy in head and neck cancer chemoprevention.
Collapse
Affiliation(s)
- Mi Sun Choe
- Department of Hematology/Oncology, Winship Cancer Institute, Emory University, Atlanta, GA 30322, USA
| | | | | | | | | |
Collapse
|
37
|
Cooke D, Steward WP, Gescher AJ, Marczylo T. Anthocyans from fruits and vegetables – Does bright colour signal cancer chemopreventive activity? Eur J Cancer 2005; 41:1931-40. [PMID: 16084717 DOI: 10.1016/j.ejca.2005.06.009] [Citation(s) in RCA: 163] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2005] [Revised: 03/28/2005] [Accepted: 06/29/2005] [Indexed: 12/20/2022]
Abstract
Consumption of fruits and berries has been associated with decreased risk of developing cancer. The most abundant flavonoid constituents of fruits and berries are anthocyans (i.e. anthocyanins, glycosides, and their aglycons, anthocyanidins) that cause intense colouration. In this review, we describe epidemiological evidence hinting at the cancer preventive activity of anthocyan-containing foods in humans, results of chemoprevention studies in rodent models with anthocyans or anthocyan-containing fruit/vegetable extracts, and pharmacological properties of anthocyans. Anthocyanidins have been shown to inhibit malignant cell survival and confound many oncogenic signalling events in the 10(-6)-10(-4) M concentration range. Studies of the pharmacokinetics of anthocyanins after their consumption as single agents, anthocyanin mixtures or berry extracts suggest that anthocyanins reach levels of 10(-8)-10(-7) M in human blood. It is unclear whether such concentrations are sufficient to explain anticarcinogenic effects, and whether anthocyanins exert chemopreventive efficacy themselves, or if they need to undergo hydrolysis to their aglyconic counterparts. The currently available literature provides tantalising hints of the potential usefulness of anthocyans or anthocyan mixtures as cancer chemopreventive interventions. Nevertheless further studies are necessary to help adjudge the propitiousness of their clinical development.
Collapse
Affiliation(s)
- Darren Cooke
- Cancer Biomarkers and Prevention Group, Department of Cancer Studies, University of Leicester, Leicester Royal Infirmary, 5th Floor, RKCSB, Leicester LE2 7LX, UK
| | | | | | | |
Collapse
|
38
|
Hou DX, Yanagita T, Uto T, Masuzaki S, Fujii M. Anthocyanidins inhibit cyclooxygenase-2 expression in LPS-evoked macrophages: structure-activity relationship and molecular mechanisms involved. Biochem Pharmacol 2005; 70:417-25. [PMID: 15963474 DOI: 10.1016/j.bcp.2005.05.003] [Citation(s) in RCA: 162] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2005] [Revised: 05/01/2005] [Accepted: 05/04/2005] [Indexed: 12/19/2022]
Abstract
The effects of anthocyanidins, the aglycon nucleuses of anthocyanins widely occurring in reddish fruits and vegetables, on the expression of cyclooxygenase-2 (COX-2) were investigated in lipopolysaccharide (LPS)-activated murine macrophage RAW264 cells. Of five anthocyanidins, delphinidin and cyanidin inhibited LPS-induced COX-2 expression, but pelargonidin, peonidin and malvidin did not. The structure-activity relationship suggest that the ortho-dihydroxyphenyl structure of anthocyanidins on the B-ring appears to be related with the inhibitory actions. Delphinidin, the most potent inhibitor, caused a dose-dependent inhibition of COX-2 expression at both mRNA and protein levels. Western blotting analysis indicated that delphinidin inhibited the degradation of IkappaB-alpha, nuclear translocation of p65 and CCAAT/enhancer-binding protein (C/EBP)delta and phosphorylation of c-Jun, but not CRE-binding protein (CREB). Moreover, delphinidin suppressed the activations of mitogen-activated protein kinase (MAPK) including c-Jun N-terminal kinase (JNK), extracellular signal-regulated kinase (ERK) and p38 kinase. MAPK inhibitors (U0126 for MEK1/2, SB203580 for p38 kinase and SP600125 for JNK) specifically blocked LPS-induced COX-2 expression. Thus, our results demonstrated that LPS-induced COX-2 expression by activating MAPK pathways and delphinidin suppressed COX-2 by blocking MAPK-mediated pathways with the attendant activation of nuclear factor-kappaB (NF-kappaB), activator protein-1 (AP-1) and C/EBPdelta. These findings provide the first molecular basis that anthocyanidins with ortho-dihydroxyphenyl structure may have anti-inflammatory properties through the inhibition of MAPK-mediated COX-2 expression.
Collapse
Affiliation(s)
- De-Xing Hou
- Department of Biochemical Science and Technology, Faculty of Agriculture, Kagoshima University, Korimoto 1-21-24, Kagoshima City 890-0065, Japan.
| | | | | | | | | |
Collapse
|
39
|
Kiyoshima K, Oda Y, Kinukawa N, Naito S, Tsuneyoshi M. Overexpression of laminin-5 gamma2 chain and its prognostic significance in urothelial carcinoma of urinary bladder: association with expression of cyclooxygenase 2, epidermal growth factor receptor [corrected] and human epidermal growth factor receptor [corrected] 2. Hum Pathol 2005; 36:522-30. [PMID: 15948119 DOI: 10.1016/j.humpath.2005.02.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Laminin-5 (LN-5) and cyclooxygenase 2 (COX-2) play important roles in many kinds of cancers. Recently, it has been reported that epidermal growth factor receptor [corrected] (EGFR) and/or human epidermal growth factor receptor [corrected] 2 (HER2) expressions are associated with LN-5 and/or COX-2 expressions in a few carcinoma cell lines and human tumor tissue. LN-5, COX-2, EGFR, and HER2 expressions were examined immunohistochemically in 67 patients with urothelial carcinomas (UCs), and associations among these 4 biomarkers and clinicopathologic characteristics were investigated. Patients were classified into transurethral resection group and cystectomy group based on clinical end points, and prognostic significances of increased expressions were evaluated. Overexpression of LN-5, COX-2, EGFR, and HER2 was observed in 16 (23.9%), 34 (50.7%), 42 (62.7%), and 15 (22.4%) of 67 patients, respectively. LN-5 overexpression was associated high-grade (P = .002), invasive (pTa+1 versus pT2-4, P = .011), and nonpapillary (P = .027) UCs. Concerning EGFR and HER2, high-grade (EGFR, P = .0009; HER2, P = .003) and nonpapillary (EGFR, P = .016; HER2, P = .0002) UCs had a significantly higher overexpression rate. UCs penetrating basal membrane (pT1-4) showed significantly higher overexpression rates than pTa UCs on all biomarkers. In transurethral resection group, LN-5 overexpression could be proved as an independent prognostic parameter for intravesical recurrence (P = .007), whereas in cystectomy group, nodal involvement was an independent prognostic parameter for cause-specific survival (P = .025). The current study showed that the 4 biomarkers were associated with aggressive behaviors of UCs. Above all, LN-5 overexpression was considered to play an important role in intravesical recurrence of superficial UCs.
Collapse
Affiliation(s)
- Keijiro Kiyoshima
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | | | | | | | | |
Collapse
|
40
|
Stoner GD, Qin H, Chen T, Carlton PS, Rose ME, Aziz RM, Dixit R. The effects of L-748706, a selective cyclooxygenase-2 inhibitor, on N-nitrosomethylbenzylamine-induced rat esophageal tumorigenesis. Carcinogenesis 2005; 26:1590-5. [PMID: 15878914 DOI: 10.1093/carcin/bgi111] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Epidemiological studies suggest that the frequent intake of non-steroidal anti-inflammatory drugs (NSAIDs) is associated with a decreased risk of developing esophageal squamous cell carcinoma (SCC). This decrease is thought to correlate with the inhibition of cyclooxygenase (COX) activity. The production of prostaglandin E2 (PGE2), a major metabolite of COX, is increased in numerous human cancers including esophageal SCC, therefore, inhibition of COX activity and subsequent suppression of the formation of PGE2 may be chemopreventive in the esophagus. The objective of the present study was to determine whether L-748706 (L-706), a novel selective COX-2 inhibitor, would prevent N-nitrosomethylbenzylamine (NMBA)-induced esophageal tumor progression in the Fischer 344 (F344) rat. In rats pretreated with a low-dose of NMBA (0.25 mg/kg body weight), L-706 at 100 p.p.m. in the diet significantly reduced tumor multiplicity but not tumor incidence. At 150 p.p.m. in the diet, L-706 alone and in combination with 200 p.p.m. piroxicam produced significant reductions in both tumor incidence and multiplicity. Inhibition of tumor development in low-dose NMBA-treated rats was associated with reductions in esophageal cell proliferation rates and PGE2 levels in preneoplastic tissues. In contrast, in rats treated with a higher dose of NMBA (0.5 mg/kg body weight), neither L-706 alone nor in combination with piroxicam reduced esophageal tumor incidence or multiplicity in spite of the fact that they reduced esophageal PGE2 levels in preneoplastic tissues and in papillomas. Cell proliferation rates were reduced only in animals treated with L-706 + piroxicam. Our data suggest that the chemopreventive treatments were effective in inhibiting tumor development in NMBA-treated animals only when they reduced PGE2 levels in preneoplastic esophageal tissues approximately to those levels found in normal esophagus.
Collapse
Affiliation(s)
- Gary D Stoner
- Cancer Chemoprevention and Support Program, Division of Hematology and Oncology, College of Medicine and Public Health, The Ohio State University, Columbus, OH 43210, USA.
| | | | | | | | | | | | | |
Collapse
|
41
|
Schuon R, Brieger J, Franke RL, Jakob R, Mann WJ. Increased PGE2 levels in nonmalignant mucosa adjacent to squamous cell carcinoma of the head and neck. ORL J Otorhinolaryngol Relat Spec 2005; 67:96-100. [PMID: 15821352 DOI: 10.1159/000084996] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2004] [Accepted: 10/29/2004] [Indexed: 01/02/2023]
Abstract
OBJECTIVE The cyclooxygenases (COX) 1 and 2 are the rate-limiting enzymes of prostaglandin E(2) (PGE(2)) synthesis, and the upregulation of COX-2 has been reported in tumors of different origins. The aim of our study was to quantify the PGE(2) expression in squamous cell carcinoma and surrounding mucosa, to analyze the potential of acetylsalicylic acid (ASA) for reducing PGE(2) levels in these tissues, and to improve our understanding of potential tumor-derived stimulation of surrounding mucosa by PGE(2). STUDY DESIGN AND SETTING Intracellular PGE(2) levels in primary head and neck squamous cell carcinoma (HNSCC) and the surrounding mucosa at 1 and 2 cm distance were analyzed ex vivo by ELISA. Subsequently, we treated in vitro tumor and normal mucosal cells from turbinates with recombinant PGE(2) and ASA, and quantified intracellular PGE(2) levels. RESULTS We observed high PGE(2) levels in the tumor samples and in tumor-surrounding mucosa. The addition of PGE(2) and arachidonic acid to tumor cell cultures resulted in no further increase in intracellular PGE(2) levels, while ASA reduced PGE(2) levels by up to 40%. In normal epithelial cell cultures, less PGE(2) (6% of that found in the tumor cells) was expressed, but stimulation with PGE(2) resulted in levels comparable to those of the tumor samples. CONCLUSION AND SIGNIFICANCE We conclude that HNSCC and the surrounding mucosa express high levels of PGE(2). This expression is reduced efficiently by ASA. We propose a stimulation of PGE(2) expression in the epithelium surrounding HNSCC by tumor-derived PGE(2) with a potential impact on tumor growth.
Collapse
Affiliation(s)
- R Schuon
- Department of Otorhinolaryngology, University Hospital, School of Medicine, Mainz, Germany
| | | | | | | | | |
Collapse
|
42
|
|
43
|
Yan C, Jamaluddin MS, Aggarwal B, Myers J, Boyd DD. Gene expression profiling identifies activating transcription factor 3 as a novel contributor to the proapoptotic effect of curcumin. Mol Cancer Ther 2005. [DOI: 10.1158/1535-7163.233.4.2] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
The antitumor effect of curcumin (diferuloylmethane) is well established. However, there have been no unbiased studies to identify novel molecular targets of this compound. We therefore undertook a gene expression profiling study to identify novel targets of curcumin. A cDNA array comprised of 12,625 probes was used to compare total RNA extracted from curcumin-treated and untreated MDA-1986 cells for differential gene expression. We identified 202 up-regulated mRNAs and 505 transcripts decreased ≥2-fold. The proapoptotic activating transcription factor 3 (ATF3) was induced >4-fold. Two negative regulators of growth control [antagonizer of myc transcriptional activity (Mad) and p27kip1] were induced 68- and 3-fold, respectively. Additionally, two dual-activity phosphatases (CL 100 and MKP-5), which inactivate the c-jun-NH2-kinases, showed augmented expression, coinciding with reduced expression of the upstream activators of c-jun-NH2-kinase (MEKK and MKK4). Of the repressed genes, the expression of Frizzled-1 (Wnt receptor) was most strongly attenuated (8-fold). Additionally, two genes implicated in growth control (K-sam, encoding the keratinocyte growth factor receptor, and HER3) as well as the E2F-5 transcription factor, which regulates genes controlling cell proliferation, also showed down-regulated expression. Considering its role in apoptosis, we determined the contribution of ATF3 to the antitumor effect of curcumin. Curcumin-treated MDA-1986 cells showed a rapid, dose-dependent increase in ATF3/mRNA protein. Moreover, expression of an exogenous ATF3 cDNA synergized with curcumin in inducing apoptosis. Thus, we have identified several putative, novel molecular targets of curcumin and showed that one, (ATF3) contributes to the proapoptotic effects of this compound.
Collapse
Affiliation(s)
| | | | | | - Jeffrey Myers
- 3Head and Neck Surgery, University of Texas, M.D. Anderson Cancer Center, Houston, Texas
| | | |
Collapse
|
44
|
Bode AM, Dong Z. Targeting signal transduction pathways by chemopreventive agents. Mutat Res 2004; 555:33-51. [PMID: 15476850 DOI: 10.1016/j.mrfmmm.2004.05.018] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2004] [Revised: 04/30/2004] [Accepted: 05/01/2004] [Indexed: 01/10/2023]
Abstract
Cancer is a dynamic process that involves many complex factors, which may explain why a "magic bullet" cure for cancer has not been found. Death rates are still rising for many types of cancers, which possibly contributes to the increased interest in chemoprevention as an alternative approach to the control of cancer. This strategy for cancer control is based on the presumption that because cancer develops through a multi-step process, each step may be a prospective target for reversing or suppressing the process. Thus, the design and development of chemopreventive agents that act on specific and/or multiple molecular and cellular targets is gaining support as a rational approach to control cancer. Nutritional or dietary factors have attracted a great deal of interest because of their perceived ability to act as highly effective chemopreventive agents. They are professed as being generally safe and may have efficacy as chemopreventive agents by preventing or reversing premalignant lesions and/or reducing second primary tumor incidence. Many of these dietary compounds appear to act on multiple target signaling pathways. Some of the most interesting and well documented are resveratrol and components of tea, including EGCG, theaflavins and caffeine. This review will focus on recent work regarding three well-accepted cellular/molecular mechanisms that may at least partially explain the effectiveness of selected food factors, including those indicated above, as chemopreventive anti-promotion agents. These food compounds may act by: (1) inducing apoptosis in cancer cells; (2) inhibiting neoplastic transformation through the inhibition of AP-1 and/or NF-kappaB activation; and/or (3) suppressing COX-2 overexpression in cancer cells.
Collapse
Affiliation(s)
- A M Bode
- Hormel Institute, University of Minnesota, 801 16th Avenue NE, Austin, MN 55912, USA
| | | |
Collapse
|
45
|
N/A. N/A. Shijie Huaren Xiaohua Zazhi 2004; 12:2410-2412. [DOI: 10.11569/wcjd.v12.i10.2410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
|
46
|
Aggarwal S, Takada Y, Singh S, Myers JN, Aggarwal BB. Inhibition of growth and survival of human head and neck squamous cell carcinoma cells by curcumin via modulation of nuclear factor-kappaB signaling. Int J Cancer 2004; 111:679-92. [PMID: 15252836 DOI: 10.1002/ijc.20333] [Citation(s) in RCA: 194] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Increased expression of proinflammatory and proangiogenic factors are associated with aggressive tumor growth and decreased survival of patients with head and neck squamous cell carcinoma (HNSCC). In as much as genes that are regulated by nuclear factor NF-kappaB suppress apoptosis, induce proliferation, and mediate inflammation, angiogenesis and tumor metastasis, agents that suppress NF-kappaB activation have potential as treatment for various cancers including HNSCC. We demonstrate that all HNSCC cell lines expressed constitutively active NF-kappaB and IkappaBalpha kinase (IKK), which is needed for NF-kappaB activation. Treatment of MDA 686LN cells with curcumin (diferuloylmethane), a pharmacologically safe chemopreventive agent, inhibited NF-kappaB activation through abrogation of IKK. As a result expression of various cell survival and cell proliferative genes including Bcl-2, cyclin D1, IL-6, COX-2 and MMP-9 was suppressed. This, in turn, inhibits proliferation of all HNSCC cell lines, arrests cell cycle in G1/S phase (MDA 686LN) and induces apoptosis as indicated by upstream and downstream caspase activation, PARP cleavage, annexin V staining in MDA 686LN cells. Suppression of NF-kappaB by cell-permeable p65-based peptide and NBD peptide also inhibited the proliferation and induced apoptosis in these cells. Our results indicate that curcumin is a potent inhibitor of cell proliferation and an inducer of apoptosis in HNSCC through suppression of IKK-mediated NF-kappaB activation and of NF-kappaB-regulated gene expression.
Collapse
Affiliation(s)
- Sita Aggarwal
- Cytokine Research Laboratory, Department of Bioimmunotheraphy, The University of Texas M. D. Anderson Cancer Center, Houston, Texas, USA.
| | | | | | | | | |
Collapse
|
47
|
Affiliation(s)
- Charles Blanke
- Oregon Health Science University, 3181 Southwest Sam Jackson Park Rd., Portland, OR 97201, USA.
| |
Collapse
|
48
|
Abstract
Head and neck squamous cell carcinoma is a devastating disease with a poor outcome in advanced stages, accounting for approximately 3% of all malignancies, with an estimated 37200 new cases and 11000 deaths annually in the U.S. Second primary tumors are estimated to occur at an annual rate of 3%-10% and are significant threats to long-term survivors. Chemoprevention is an appealing strategy, and its success has been demonstrated in breast cancer and familial adenomatous polyposis. High-dose retinoids have been shown to be active against oral premalignant lesions and in prevention of second primary tumors in the head and neck. New targets include the epidermal growth factor receptor, cyclooxygenase-2, and other molecular targets. Challenges in future head and neck cancer chemoprevention investigations include achieving long-lasting efficacy with retinoids and/or new agents, and determining the optimal dose and duration of therapy while maintaining acceptable toxicities.
Collapse
Affiliation(s)
- John C Rhee
- Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, Pennsylvania, USA
| | | | | |
Collapse
|
49
|
Abstract
The cyclooxygenase (COX) enzymes (COX-1 and COX-2) are key enzymes of prostaglandin (PG) biosynthesis. Nonselective non-steroidal anti-inflammatory drugs (NSAIDs) inhibit the enzymatic activity of both COX-1 and COX-2. Selective COX-2 inhibitors have been developed that appear to have 50% less gastrointestinal toxicity than traditional nonselective NSAIDs. Experimental evidence suggests that the COX pathway is involved in tumor promotion. Evidence to support this comes from both clinical and laboratory findings suggesting that chronic NSAID use reduces the relative risk for developing colorectal cancer (CRC). Although the precise mechanism or mechanisms by which these drugs affect tumor progression is not completely understood, it is likely that part of their anti-tumor effect is due to inhibition of the COX- 2 enzyme. COX-2 levels are increased in CRC as well as in several other solid malignancies. COX-2-derived bioactive lipid products promote tumor-associated n eovascularization, inhibit cell death, and stimulate cell proliferation and motility. Additionally, treatment with COX-2-selective inhibitors reduces polyp burden in animal models of intestinal neoplasia and in humans with familial adenomatous polyposis (FAP). Ongoing human clinical trails are under way to test the efficacy of COX-2-selective inhibitors in a number of human cancers.
Collapse
Affiliation(s)
- Jason R Mann
- Department of Medicine, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, 694 Preston Research Building, Nashville, TN 37232-6838, USA
| | | |
Collapse
|
50
|
Wallace JM. Nutritional and botanical modulation of the inflammatory cascade--eicosanoids, cyclooxygenases, and lipoxygenases--as an adjunct in cancer therapy. Integr Cancer Ther 2004; 1:7-37; discussion 37. [PMID: 14664746 DOI: 10.1177/153473540200100102] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Emerging on the horizon in cancer therapy is an expansion of the scope of treatment beyond cytotoxic approaches to include molecular management of cancer physiopathology. The goal in these integrative approaches, which extends beyond eradicating the affected cells, is to control the cancer phenotype. One key new approach appears to be modulation of the inflammatory cascade, as research is expanding that links cancer initiation, promotion, progression, angiogenesis, and metastasis to inflammatory events. This article presents a literature review of the emerging relationship between neoplasia and inflammatory eicosanoids (PGE2 and related prostaglandins), with a focus on how inhibition of their synthesizing oxidases, particularly cyclooxygenase (COX), offers anticancer actions in vitro and in vivo. Although a majority of this research emphasizes the pharmaceutical applications of nonsteroidal anti-inflammatory drugs and selective COX-2 inhibitors, these agents fail to address alternate pathways available for the synthesis of proinflammatory eicosanoids. Evidence is presented that suggests the inhibition of lipoxygenase and its by-products-LTB4, 5-HETE, and 12-HETE-represents an overlooked but crucial component in complementary cancer therapies. Based on the hypothesis that natural agents capable of modulating both lipoxygenase and COX may advance the efficacy of cancer therapy, an overview and discussion is presented of dietary modifications and selected nutritional and botanical agents (notably, omega-3 fatty acids, antioxidants, boswellia, bromelain, curcumin, and quercetin) that favorably influence eicosanoid production.
Collapse
Affiliation(s)
- Jeanne M Wallace
- Nutritional Solutions, Inc., 2935 North, 1000 East, North Logan, UT 84341, USA.
| |
Collapse
|