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Li J, Wang X, Zhang H, Hu X, Peng X, Jiang W, Zhuo L, Peng Y, Zeng G, Wang Z. Fenamates: Forgotten treasure for cancer treatment and prevention: Mechanisms of action, structural modification, and bright future. Med Res Rev 2024. [PMID: 39171404 DOI: 10.1002/med.22079] [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: 12/13/2022] [Revised: 08/03/2024] [Accepted: 08/08/2024] [Indexed: 08/23/2024]
Abstract
Fenamates as classical nonsteroidal anti-inflammatory agents are widely used for relieving pain. Preclinical studies and epidemiological data highlight their chemo-preventive and chemotherapeutic potential for cancer. However, comprehensive reviews of fenamates in cancer are limited. To accelerate the repurposing of fenamates, this review summarizes the results of fenamates alone or in combination with existing chemotherapeutic agents. This paper also explores targets of fenamates in cancer therapy, including COX, AKR family, AR, gap junction, FTO, TEAD, DHODH, TAS2R14, ion channels, and DNA. Besides, this paper discusses other mechanisms, such as regulating Wnt/β-catenin, TGF-β, p38 MAPK, and NF-κB pathway, and the regulation of the expressions of Sp, EGR-1, NAG-1, ATF-3, ErbB2, AR, as well as the modulation of the tumor immune microenvironment. Furthermore, this paper outlined the structural modifications of fenamates, highlighting their potential as promising leads for anticancer drugs.
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Affiliation(s)
- Junfang Li
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, China
| | - Xiaodong Wang
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, China
| | - Honghua Zhang
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, China
| | - Xiaoling Hu
- School of Pharmacy, Lanzhou University, Lanzhou, Gansu, China
| | - Xue Peng
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Weifan Jiang
- Postdoctoral Station for Basic Medicine, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- The Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Linsheng Zhuo
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- Postdoctoral Station for Basic Medicine, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Yan Peng
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Guo Zeng
- Postdoctoral Station for Basic Medicine, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Zhen Wang
- School of Pharmaceutical Science, Hengyang Medical School, University of South China, Hengyang, Hunan, China
- Postdoctoral Station for Basic Medicine, School of Basic Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan, China
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2
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Coutinho LL, Femino EL, Gonzalez AL, Moffat RL, Heinz WF, Cheng RYS, Lockett SJ, Rangel MC, Ridnour LA, Wink DA. NOS2 and COX-2 Co-Expression Promotes Cancer Progression: A Potential Target for Developing Agents to Prevent or Treat Highly Aggressive Breast Cancer. Int J Mol Sci 2024; 25:6103. [PMID: 38892290 PMCID: PMC11173351 DOI: 10.3390/ijms25116103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 05/24/2024] [Accepted: 05/29/2024] [Indexed: 06/21/2024] Open
Abstract
Nitric oxide (NO) and reactive nitrogen species (RNS) exert profound biological impacts dictated by their chemistry. Understanding their spatial distribution is essential for deciphering their roles in diverse biological processes. This review establishes a framework for the chemical biology of NO and RNS, exploring their dynamic reactions within the context of cancer. Concentration-dependent signaling reveals distinctive processes in cancer, with three levels of NO influencing oncogenic properties. In this context, NO plays a crucial role in cancer cell proliferation, metastasis, chemotherapy resistance, and immune suppression. Increased NOS2 expression correlates with poor survival across different tumors, including breast cancer. Additionally, NOS2 can crosstalk with the proinflammatory enzyme cyclooxygenase-2 (COX-2) to promote cancer progression. NOS2 and COX-2 co-expression establishes a positive feed-forward loop, driving immunosuppression and metastasis in estrogen receptor-negative (ER-) breast cancer. Spatial evaluation of NOS2 and COX-2 reveals orthogonal expression, suggesting the unique roles of these niches in the tumor microenvironment (TME). NOS2 and COX2 niche formation requires IFN-γ and cytokine-releasing cells. These niches contribute to poor clinical outcomes, emphasizing their role in cancer progression. Strategies to target these markers include direct inhibition, involving pan-inhibitors and selective inhibitors, as well as indirect approaches targeting their induction or downstream effectors. Compounds from cruciferous vegetables are potential candidates for NOS2 and COX-2 inhibition offering therapeutic applications. Thus, understanding the chemical biology of NO and RNS, their spatial distribution, and their implications in cancer progression provides valuable insights for developing targeted therapies and preventive strategies.
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Affiliation(s)
- Leandro L. Coutinho
- Cancer Innovation Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA; (L.L.C.); (E.L.F.); (A.L.G.); (R.Y.S.C.)
- Center for Translational Research in Oncology, ICESP/HC, Faculdade de Medicina da Universidade de São Paulo and Comprehensive Center for Precision Oncology, Universidade de São Paulo, São Paulo 01246-000, SP, Brazil;
| | - Elise L. Femino
- Cancer Innovation Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA; (L.L.C.); (E.L.F.); (A.L.G.); (R.Y.S.C.)
| | - Ana L. Gonzalez
- Cancer Innovation Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA; (L.L.C.); (E.L.F.); (A.L.G.); (R.Y.S.C.)
| | - Rebecca L. Moffat
- Optical Microscopy and Analysis Laboratory, Office of Science and Technology Resources, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA;
| | - William F. Heinz
- Optical Microscopy and Analysis Laboratory, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA; (W.F.H.); (S.J.L.)
| | - Robert Y. S. Cheng
- Cancer Innovation Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA; (L.L.C.); (E.L.F.); (A.L.G.); (R.Y.S.C.)
| | - Stephen J. Lockett
- Optical Microscopy and Analysis Laboratory, Cancer Research Technology Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA; (W.F.H.); (S.J.L.)
| | - M. Cristina Rangel
- Center for Translational Research in Oncology, ICESP/HC, Faculdade de Medicina da Universidade de São Paulo and Comprehensive Center for Precision Oncology, Universidade de São Paulo, São Paulo 01246-000, SP, Brazil;
| | - Lisa A. Ridnour
- Cancer Innovation Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA; (L.L.C.); (E.L.F.); (A.L.G.); (R.Y.S.C.)
| | - David A. Wink
- Cancer Innovation Laboratory, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, MD 21702, USA; (L.L.C.); (E.L.F.); (A.L.G.); (R.Y.S.C.)
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3
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Kim I, Lertpatipanpong P, Yoon Y, Lee J, Hong Y, Boonruang K, Ryu J, Baek SJ. Tolfenamic acid negatively regulates YAP and TAZ expression in human cancer cells. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2023; 1870:119556. [PMID: 37544381 DOI: 10.1016/j.bbamcr.2023.119556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 07/24/2023] [Accepted: 07/27/2023] [Indexed: 08/08/2023]
Abstract
Several diseases are associated with improper regulation of the Hippo pathway, which plays an important role in cell proliferation and cancer metastasis. Overactivation of the YAP and TAZ proteins accelerates cell proliferation, invasion, and migration during tumorigenesis. Tolfenamic acid (TA) is a non-steroidal anti-inflammatory drug (NSAID) that exhibits activity against various types of cancer. In this study, we observed that TA decreased YAP and TAZ protein levels in cancer cells. TA increased the phosphorylation of YAP and TAZ, leading to the degradation of YAP and TAZ in the cytoplasm and nucleus. TA predominantly affected multiple phosphodegron sites in the YAP and TAZ and lowered 14-3-3β protein expression, causing YAP and TAZ to enter the ubiquitination pathway. Proteins that affect YAP and TAZ regulation, such as NAG-1 and several YAP/TAZ E3 ligases, were not involved in TA-mediated YAP/TAZ degradation. In summary, our results indicate that TA affects phosphodegron sites on YAP/TAZ, demonstrating a novel effect of TA in tumorigenesis.
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Affiliation(s)
- Ilju Kim
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Pattawika Lertpatipanpong
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Yongdae Yoon
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Jaehak Lee
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Yukyung Hong
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Kanokkan Boonruang
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Junsun Ryu
- Department of Otolaryngology-Head and Neck Surgery, Center for Thyroid Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
| | - Seung Joon Baek
- College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Republic of Korea.
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4
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Pearson YE, Kremb S, Butterfoss GL, Xie X, Fahs H, Gunsalus KC. A statistical framework for high-content phenotypic profiling using cellular feature distributions. Commun Biol 2022; 5:1409. [PMID: 36550289 PMCID: PMC9780213 DOI: 10.1038/s42003-022-04343-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Accepted: 12/05/2022] [Indexed: 12/24/2022] Open
Abstract
High-content screening (HCS) uses microscopy images to generate phenotypic profiles of cell morphological data in high-dimensional feature space. While HCS provides detailed cytological information at single-cell resolution, these complex datasets are usually aggregated into summary statistics that do not leverage patterns of biological variability within cell populations. Here we present a broad-spectrum HCS analysis system that measures image-based cell features from 10 cellular compartments across multiple assay panels. We introduce quality control measures and statistical strategies to streamline and harmonize the data analysis workflow, including positional and plate effect detection, biological replicates analysis and feature reduction. We also demonstrate that the Wasserstein distance metric is superior over other measures to detect differences between cell feature distributions. With this workflow, we define per-dose phenotypic fingerprints for 65 mechanistically diverse compounds, provide phenotypic path visualizations for each compound and classify compounds into different activity groups.
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Affiliation(s)
- Yanthe E. Pearson
- grid.440573.10000 0004 1755 5934Center for Genomics and Systems Biology, New York University Abu Dhabi, P. O. Box 129188, Abu Dhabi, UAE
| | - Stephan Kremb
- grid.440573.10000 0004 1755 5934Center for Genomics and Systems Biology, New York University Abu Dhabi, P. O. Box 129188, Abu Dhabi, UAE
| | - Glenn L. Butterfoss
- grid.440573.10000 0004 1755 5934Center for Genomics and Systems Biology, New York University Abu Dhabi, P. O. Box 129188, Abu Dhabi, UAE
| | - Xin Xie
- grid.440573.10000 0004 1755 5934Center for Genomics and Systems Biology, New York University Abu Dhabi, P. O. Box 129188, Abu Dhabi, UAE
| | - Hala Fahs
- grid.440573.10000 0004 1755 5934Center for Genomics and Systems Biology, New York University Abu Dhabi, P. O. Box 129188, Abu Dhabi, UAE
| | - Kristin C. Gunsalus
- grid.440573.10000 0004 1755 5934Center for Genomics and Systems Biology, New York University Abu Dhabi, P. O. Box 129188, Abu Dhabi, UAE ,grid.137628.90000 0004 1936 8753Department of Biology and Center for Genomics and Systems Biology, New York University, New York, NY 10003 USA
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5
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Non-aspirin NSAIDs and head and neck cancer mortality in a Danish nationwide cohort study. Cancer Epidemiol 2022; 77:102121. [DOI: 10.1016/j.canep.2022.102121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 01/12/2022] [Accepted: 02/10/2022] [Indexed: 12/24/2022]
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6
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Wischhusen J, Melero I, Fridman WH. Growth/Differentiation Factor-15 (GDF-15): From Biomarker to Novel Targetable Immune Checkpoint. Front Immunol 2020; 11:951. [PMID: 32508832 PMCID: PMC7248355 DOI: 10.3389/fimmu.2020.00951] [Citation(s) in RCA: 239] [Impact Index Per Article: 59.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 04/23/2020] [Indexed: 12/12/2022] Open
Abstract
Growth/differentiation factor-15 (GDF-15), also named macrophage inhibitory cytokine-1, is a divergent member of the transforming growth factor β superfamily. While physiological expression is barely detectable in most somatic tissues in humans, GDF-15 is abundant in placenta. Elsewhere, GDF-15 is often induced under stress conditions, seemingly to maintain cell and tissue homeostasis; however, a moderate increase in GDF-15 blood levels is observed with age. Highly elevated GDF-15 levels are mostly linked to pathological conditions including inflammation, myocardial ischemia, and notably cancer. GDF-15 has thus been widely explored as a biomarker for disease prognosis. Mechanistically, induction of anorexia via the brainstem-restricted GDF-15 receptor GFRAL (glial cell-derived neurotrophic factor [GDNF] family receptor α-like) is well-documented. GDF-15 and GFRAL have thus become attractive targets for metabolic intervention. Still, several GDF-15 mediated effects (including its physiological role in pregnancy) are difficult to explain via the described pathway. Hence, there is a clear need to better understand non-metabolic effects of GDF-15. With particular emphasis on its immunomodulatory potential this review discusses the roles of GDF-15 in pregnancy and in pathological conditions including myocardial infarction, autoimmune disease, and specifically cancer. Importantly, the strong predictive value of GDF-15 as biomarker may plausibly be linked to its immune-regulatory function. The described associations and mechanistic data support the hypothesis that GDF-15 acts as immune checkpoint and is thus an emerging target for cancer immunotherapy.
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Affiliation(s)
- Jörg Wischhusen
- Experimental Tumor Immunology, Department of Obstetrics and Gynecology, University of Würzburg Medical School, Würzburg, Germany
| | - Ignacio Melero
- Program of Immunology and Immunotherapy, Center for Applied Medical Research (CIMA), Pamplona, Spain
- Centro de Investigación Biomédica en Red Cáncer, CIBERONC, Madrid, Spain
- Immunology and Immunotherapy Unit, Clínica Universidad de Navarra, Pamplona, Spain
| | - Wolf Herman Fridman
- INSERM, UMR_S 1138, Cordeliers Research Center, Université de Paris, Sorbonne Université Team Cancer, Immune Control and Escape, Paris, France
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7
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Modi A, Dwivedi S, Roy D, Khokhar M, Purohit P, Vishnoi J, Pareek P, Sharma S, Sharma P, Misra S. Growth differentiation factor 15 and its role in carcinogenesis: an update. Growth Factors 2019; 37:190-207. [PMID: 31693861 DOI: 10.1080/08977194.2019.1685988] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Growth differentiation factor-15 (GDF-15) is a novel cytokine secreted by a variety of cells like macrophages, adipocytes, normally expressed in high amounts by placenta. It is also highly expressed in multiple carcinomas like Colon, Breast, Pancreas, Liver, and Ovarian. Several reports on serum GDF-15 as a potential biomarker for diagnosis and prognosis of cancer are hampered by the lack of robust data, with large sample size and critical patient recruitment. However, experimental accounts on cancer tumors, cell lines, and animal models suggest GDF-15's role in cancer progression via endothelial mesenchymal transition, angiogenesis, metastasis, drug resistance and even stemness of various cancers. GDF-15 could be the point of amalgamation for the various hallmarks of cancer and can prove a useful therapeutic target in cancer. The current review was conceptualized with a thought of critically appraising the existing information of GDF-15 in carcinogenesis.
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Affiliation(s)
- Anupama Modi
- Department of Biochemistry, AIIMS Jodhpur, Jodhpur, Rajasthan, India
| | | | - Dipayan Roy
- Department of Biochemistry, AIIMS Jodhpur, Jodhpur, Rajasthan, India
| | - Manoj Khokhar
- Department of Biochemistry, AIIMS Jodhpur, Jodhpur, Rajasthan, India
| | - Purvi Purohit
- Department of Biochemistry, AIIMS Jodhpur, Jodhpur, Rajasthan, India
| | | | - Puneet Pareek
- Department of Radiotherapy, AIIMS Jodhpur, Jodhpur, Rajasthan, India
| | - Shailja Sharma
- Department of Biochemistry, AIIMS Jodhpur, Jodhpur, Rajasthan, India
| | - Praveen Sharma
- Department of Biochemistry, AIIMS Jodhpur, Jodhpur, Rajasthan, India
| | - Sanjeev Misra
- Department of Oncosurgery, AIIMS Jodhpur, Jodhpur, Rajasthan, India
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8
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Wu K, Na K, Chen D, Wang Y, Pan H, Wang X. Effects of non-steroidal anti-inflammatory drug-activated gene-1 on Ganoderma lucidum polysaccharides-induced apoptosis of human prostate cancer PC-3 cells. Int J Oncol 2018; 53:2356-2368. [PMID: 30272272 PMCID: PMC6203158 DOI: 10.3892/ijo.2018.4578] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 06/14/2018] [Indexed: 12/19/2022] Open
Abstract
Ganoderma lucidum polysaccharides (GLP) has been demonstrated to elicit antitumorigenic and proapoptotic activities in cancer; however, the molecular mechanisms underlying the anticancer effects of GLP have yet to be elucidated. Non-steroidal anti-inflammatory drug-activated gene-1 (NAG-1) has been reported to exert proapoptotic effects and therefore, may serve an important role in cancer prevention. The present study aimed to elucidate the molecular mechanism by which GLP stimulates anticancer activity in human prostate cancer (PCa) PC-3 cells. In addition, the role of NAG-1 in GLP-induced cancer inhibition was examined. The results of the present study demonstrated that GLP significantly inhibited cell viability in a time- and dose-dependent manner in PC-3 cells. Flow cytometry indicated that GLP induced late apoptosis, which was accompanied by poly (ADP-ribose) polymerase 1 (PARP) cleavage, and inhibition of pro-caspase-3, -6 and -9 protein expression. Furthermore, it was observed that the expression levels of NAG-1, and its transcriptional factor early growth response-1, were upregulated in a time- and dose-dependent manner upon GLP treatment. The results of a luciferase assay demonstrated that GLP induced the promoter activity of NAG-1, thus indicating that NAG-1 may be transcriptionally regulated by GLP. The secretion of NAG-1 proteins into the cell culture medium was also upregulated upon GLP treatment. Furthermore, inhibition of NAG-1 expression by small interfering RNA significantly, but not completely, prevented GLP-induced apoptosis, and reversed the effects of GLP on PARP and pro-caspase expression. It was further demonstrated that GLP inhibited the phosphorylation of protein kinase B and mitogen-activated protein kinase/extracellular signal-regulated kinase signaling in PC-3 cells. The present study is the first, to the best of our knowledge, to report that GLP may induce apoptosis of PCa cells, which is partially mediated through NAG-1 induction. The present findings may be helpful in elucidating the anticancer mechanisms of GLP through NAG-1 induction for its chemopreventive potential in PCa.
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Affiliation(s)
- Kaikai Wu
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Kun Na
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Dian Chen
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Yujie Wang
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Haitao Pan
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Xingya Wang
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
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9
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Kang SU, Kim YS, Kim YE, Park JK, Lee YS, Kang HY, Jang JW, Ryeo JB, Lee Y, Shin YS, Kim CH. Opposite effects of non-thermal plasma on cell migration and collagen production in keloid and normal fibroblasts. PLoS One 2017; 12:e0187978. [PMID: 29145520 PMCID: PMC5690474 DOI: 10.1371/journal.pone.0187978] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 10/30/2017] [Indexed: 12/18/2022] Open
Abstract
Recent progress in the understanding non-thermal plasma (NTP) properties prompted its application in the treatment of various diseases. However, therapeutic effect of NTP on keloid cells has not been reported previously. We sought to investigate the effect of NTP treatment on keloid by comparing cell migration and collagen production of keloid (KFs) and normal fibroblasts (NFs) and determined the regulatory pathways involved. We assessed NTP effects on cell migration in KFs and NFs by the wound healing assay and measured the expression of the epidermal growth factor receptor (EGFR), signal transducer and activator of transcription-3 (STAT3), and collagen by western blot. Expression of the transforming growth factor-β and Type I collagen following NTP treatment was determined by reverse transcription-polymerase chain reaction, immunofluorescence staining, and the Sircol collagen assay. NTP treatment increased cell migration and collagen production of NFs. However, it reduced these parameters in KFs. NTP reduced the expression of EGFR, STAT3, and Type I collagen in KFs but increased their levels in NFs. We revealed that NTP suppressed KF cell migration via down-regulation of EGFR and STAT3 and reduced collagen production via supressing transforming growth factor-β. Our data suggest that NTP may be a new therapeutic strategy for keloids.
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Affiliation(s)
- Sung Un Kang
- Department of Otolaryngology, Ajou University, Suwon, Korea
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
| | - Yeon Soo Kim
- Department of Otorhinolaryngology, College of Medicine, Konyang University Hospital, Konyang University Myunggok Medical research Institute, Daejeon, Korea
| | - Yang Eun Kim
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
| | - Ju-Kyeong Park
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
| | - Yun Sang Lee
- Department of Otolaryngology, Ajou University, Suwon, Korea
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
| | - Hee Young Kang
- Department of Dermatology, Ajou University, Suwon, Korea
| | - Jae Won Jang
- Department of Otorhinolaryngology, Chungnam National University, Daejeon, Korea
| | | | | | - Yoo Seob Shin
- Department of Otolaryngology, Ajou University, Suwon, Korea
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
| | - Chul-Ho Kim
- Department of Otolaryngology, Ajou University, Suwon, Korea
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
- * E-mail:
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10
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Mathew B, Hobrath JV, Lu W, Li Y, Reynolds RC. Synthesis and preliminary assessment of the anticancer and Wnt/β-catenin inhibitory activity of small amide libraries of fenamates and profens. Med Chem Res 2017; 26:3038-3045. [PMID: 29104411 PMCID: PMC5656725 DOI: 10.1007/s00044-017-2001-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 07/20/2017] [Indexed: 12/21/2022]
Abstract
As part of an ongoing program to study the anticancer activity of non-steroidal anti-inflammatory drugs (NSAIDs) through generating diversity libraries of multiple NSAID scaffolds, we synthesized a series of NSAID amide derivatives and screened these sets against three cancer cell lines (prostate, colon and breast) and Wnt/β-catenin signaling. The evaluated amide analog libraries show significant anticancer activity/cell proliferation inhibition, and specific members of the sets show inhibition of Wnt/β-catenin signaling.
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Affiliation(s)
- Bini Mathew
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL 35205 USA
| | - Judith V. Hobrath
- Drug Discovery Unit, College of Life Sciences, University of Dundee, Dundee, DD1 5EH UK
| | - Wenyan Lu
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL 35205 USA
| | - Yonghe Li
- Drug Discovery Division, Southern Research Institute, 2000 Ninth Avenue South, Birmingham, AL 35205 USA
| | - Robert C. Reynolds
- Division of Hematology and Oncology, The University of Alabama at Birmingham, Birmingham, Alabama 35294 USA
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11
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Kim SA, Roh JL, Kim SB, Choi SH, Nam SY, Kim SY. Aspirin use and head and neck cancer survival: an observational study of 11,623 person-years follow-up. Int J Clin Oncol 2017; 23:52-58. [DOI: 10.1007/s10147-017-1165-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 07/13/2017] [Indexed: 11/25/2022]
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12
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Shajahan-Haq AN, Boca SM, Jin L, Bhuvaneshwar K, Gusev Y, Cheema AK, Demas DD, Raghavan KS, Michalek R, Madhavan S, Clarke R. EGR1 regulates cellular metabolism and survival in endocrine resistant breast cancer. Oncotarget 2017; 8:96865-96884. [PMID: 29228577 PMCID: PMC5722529 DOI: 10.18632/oncotarget.18292] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 05/17/2017] [Indexed: 12/12/2022] Open
Abstract
About 70% of all breast cancers are estrogen receptor alpha positive (ER+; ESR1). Many are treated with antiestrogens. Unfortunately, de novo and acquired resistance to antiestrogens is common but the underlying mechanisms remain unclear. Since growth of cancer cells is dependent on adequate energy and metabolites, the metabolomic profile of endocrine resistant breast cancers likely contains features that are deterministic of cell fate. Thus, we integrated data from metabolomic and transcriptomic analyses of ER+ MCF7-derived breast cancer cells that are antiestrogen sensitive (LCC1) or resistant (LCC9) that resulted in a gene-metabolite network associated with EGR1 (early growth response 1). In human ER+ breast tumors treated with endocrine therapy, higher EGR1 expression was associated with a more favorable prognosis. Mechanistic studies showed that knockdown of EGR1 inhibited cell growth in both cells and EGR1 overexpression did not affect antiestrogen sensitivity. Comparing metabolite profiles in LCC9 cells following perturbation of EGR1 showed interruption of lipid metabolism. Tolfenamic acid, an anti-inflammatory drug, decreased EGR1 protein levels and synergized with antiestrogens in inhibiting cell proliferation in LCC9 cells. Collectively, these findings indicate that EGR1 is an important regulator of breast cancer cell metabolism and is a promising target to prevent or reverse endocrine resistance.
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Affiliation(s)
- Ayesha N Shajahan-Haq
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
| | - Simina M Boca
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA.,Innovation Center for Biomedical Informatics (ICBI), Georgetown University Medical Center, Washington, DC, USA.,Department of Biostatistics, Bioinformatics and Biomathematics, Georgetown University, Washington, DC, USA
| | - Lu Jin
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
| | - Krithika Bhuvaneshwar
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA.,Innovation Center for Biomedical Informatics (ICBI), Georgetown University Medical Center, Washington, DC, USA
| | - Yuriy Gusev
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA.,Innovation Center for Biomedical Informatics (ICBI), Georgetown University Medical Center, Washington, DC, USA
| | - Amrita K Cheema
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
| | - Diane D Demas
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
| | - Kristopher S Raghavan
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
| | | | - Subha Madhavan
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA.,Innovation Center for Biomedical Informatics (ICBI), Georgetown University Medical Center, Washington, DC, USA
| | - Robert Clarke
- Department of Oncology, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, DC, USA
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13
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Na K, Li K, Sang T, Wu K, Wang Y, Wang X. Anticarcinogenic effects of water extract of sporoderm-broken spores of Ganoderma lucidum on colorectal cancer in vitro and in vivo. Int J Oncol 2017; 50:1541-1554. [PMID: 28358412 PMCID: PMC5403400 DOI: 10.3892/ijo.2017.3939] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Accepted: 03/13/2017] [Indexed: 02/07/2023] Open
Abstract
Ganoderma lucidum (G. lucidum) polysaccharides (GLPs) have been used as traditional Chinese medicine for cancer prevention for many years. However, the mechanism by which GLP exerts its chemopreventive activities remains elusive. In addition, it is unclear whether sporoderm-broken spores of G. lucidum water extract (BSGLWE), which contains mainly GLPs, has anticancer effects on colorectal cancer. The present study investigated the anticancer effects and potential mechanisms of BSGLWE on colorectal cancer in vivo and in vitro. Our results showed that BSGLWE significantly inhibited colorectal cancer HCT116 cell viability in a time- and dose-dependent manner. Flow cytometry analysis indicated that BSGLWE disrupted cell cycle progression at G2/M phase via downregulation of cyclin B1 and cyclin A2, and upregulation of P21 at mRNA levels. Moreover, BSGLWE induced apoptosis by decreasing Bcl-2 and survivin at mRNA levels, and reduced Bcl-2, PARP, pro-caspase-3 and pro-caspase-9 at protein levels. Furthermore, BSGLWE suppressed tumor growth in vivo by regulating the expression of genes and proteins associated with cell cycle and apoptosis, which was further confirmed by a reduction of Ki67, PCNA, and Bcl-2 expression as determined by immunohistochemistry staining. NSAID activated gene-1 (NAG-1), a pro-apoptotic gene, was significantly upregulated in vivo and in vitro upon BSGLWE treatment at both mRNA and protein levels. In addition, the relative amounts of secreted NAG-1 in cell culture medium or serum of nude mice were all upregulated upon BSGLWE treatments, suggesting a role of NAG-1 in BSGLWE-induced anticolorectal cancer activity. This is the first study to show that BSGLWE inhibits colorectal cancer carcinogenesis through regulating genes responsible for cell proliferation, cell cycle and apoptosis cascades. These findings indicate that BSGLWE possesses chemopreventive potential in colorectal cancer which may serve as a promising anticancer agent for clinical applications.
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Affiliation(s)
- Kun Na
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Kang Li
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Tingting Sang
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Kaikai Wu
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Ying Wang
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
| | - Xingya Wang
- College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310053, P.R. China
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14
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Zankov DP, Sato A, Shimizu A, Ogita H. Differential Effects of Myocardial Afadin on Pressure Overload-Induced Compensated Cardiac Hypertrophy. Circ J 2017; 81:1862-1870. [DOI: 10.1253/circj.cj-17-0394] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dimitar P. Zankov
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science
| | - Akira Sato
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science
| | - Akio Shimizu
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science
| | - Hisakazu Ogita
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science
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15
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Jittreetat T, Shin YS, Hwang HS, Lee BS, Kim YS, Sannikorn P, Kim CH. Tolfenamic Acid Inhibits the Proliferation, Migration, and Invasion of Nasopharyngeal Carcinoma: Involvement of p38-Mediated Down-Regulation of Slug. Yonsei Med J 2016; 57:588-98. [PMID: 26996556 PMCID: PMC4800346 DOI: 10.3349/ymj.2016.57.3.588] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 08/22/2015] [Accepted: 08/23/2015] [Indexed: 01/11/2023] Open
Abstract
PURPOSE Tolfenamic acid (TA), a non-steroidal anti-inflammatory drug, is known to exhibit antitumor effects in various cancers apart from nasopharyngeal cancer (NPC). NPC exhibits high invasiveness, as well as metastatic potential, and patients continue to suffer from residual, recurrent, or metastatic disease even after chemoradiation therapy. Therefore, new treatment strategies are needed for NPC. In this study, we investigated the efficacy and molecular mechanisms of TA in NPC treatment. MATERIALS AND METHODS TA-induced cell death was detected by cell viability assay in the NPC cell lines, HNE1 and HONE1. Wound healing assay, invasion assay, and Western blot analysis were used to evaluate the antitumor effects of TA in NPC cell lines. RESULTS Treatment with TA suppressed the migration and invasion of HNE1 and HONE1 cells. Hepatocyte growth factor enhanced the proliferation, migration, and invasion abilities of NPC cells. This enhancement was successfully inhibited by TA treatment. Treatment with TA increased phosphorylation of p38, and the inhibition of p38 with SB203580 reversed the cytotoxic, anti-invasive, and anti-migratory effects of TA treatment in NPC cell lines. Moreover, inhibition of p38 also reversed the decrease in expression of Slug that was induced by TA treatment. CONCLUSION In conclusion, the activation of p38 plays a role in mediating TA-induced cytotoxicity and inhibition of invasion and migration via down-regulation of Slug.
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Affiliation(s)
- Tatsanachat Jittreetat
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, Korea
- Center of Excellent in Otorhinolaryngology, Head and Neck Surgery, Rajavithi Hospital, Bangkok, Thailand
| | - Yoo Seob Shin
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, Korea
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
| | - Hye Sook Hwang
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, Korea
| | - Bok-Soon Lee
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, Korea
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
| | - Yeon Soo Kim
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, Korea
| | - Phakdee Sannikorn
- Center of Excellent in Otorhinolaryngology, Head and Neck Surgery, Rajavithi Hospital, Bangkok, Thailand.
| | - Chul-Ho Kim
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon, Korea
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea.
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16
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Ha T, Lou Z, Baek SJ, Lee SH. Tolfenamic acid downregulates β-catenin in colon cancer. Int Immunopharmacol 2016; 35:287-293. [PMID: 27089389 DOI: 10.1016/j.intimp.2016.04.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Revised: 04/04/2016] [Accepted: 04/06/2016] [Indexed: 12/30/2022]
Abstract
Tolfenamic acid is one of the fenamic acid-derived non-steroid anti-inflammatory drugs (NSAIDs) and has been shown to exhibit anti-cancer activities in several types of cancer. Both mutations and aberrant expression of β-catenin are highly associated with progression of cancer. Therefore, β-catenin is considered to be a promising molecular target for cancer prevention and treatment. The current study investigates the role of tolfenamic acid on β-catenin expression in colon cancer. Treatment with tolfenamic acid led to inhibition of cell growth and down-regulation of β-catenin expression in a dose- and time-dependent manner in human colon cancer cell lines. Reduction of β-catenin upon tolfenamic acid treatment was associated with ubiquitin-mediated proteasomal degradation, without affecting mRNA level and promoter activity of β-catenin. In addition, treatment with tolfenamic acid downregulated Smad2 and Smad3 expression, while overexpression of Smad2, but not Smad3, blocked tolfenamic acid-induced suppression of β-catenin expression. Tolfenamic acid also decreased expression of β-catenin target genes, including vascular endothelial growth factor (VEGF). Compared to adjacent normal tissue, intestinal tumor tissues of Apc(Min/+) mice exhibited increased expression of β-catenin, Smad2, Smad3, and VEGF, which were down-regulated with tolfenamic acid treatment at a dose of 50mg/kg body weight. In conclusion, our findings suggest that tolfenamic acid inhibits growth of colon cancer cells through downregulation of Smad2 and, subsequently, facilitating ubiquitin-proteasome-mediated β-catenin degradation in colon cancer.
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Affiliation(s)
- Taekyu Ha
- Department of Nutrition and Food Science, College of Agriculture and Natural Resources, University of Maryland, College Park, MD 20742, USA
| | - Zhiyuan Lou
- Department of Nutrition and Food Science, College of Agriculture and Natural Resources, University of Maryland, College Park, MD 20742, USA
| | - Seung Joon Baek
- Department of Biomedical and Diagnostic Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37996, USA
| | - Seong-Ho Lee
- Department of Nutrition and Food Science, College of Agriculture and Natural Resources, University of Maryland, College Park, MD 20742, USA.
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17
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Validation of a UV Spectrometric Method for the Assay of Tolfenamic Acid in Organic Solvents. JOURNAL OF PHARMACEUTICS 2015; 2015:216249. [PMID: 26783497 PMCID: PMC4689964 DOI: 10.1155/2015/216249] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Accepted: 11/17/2015] [Indexed: 01/24/2023]
Abstract
The present study has been carried out to validate a UV spectrometric method for the assay of tolfenamic acid (TA) in organic solvents. TA is insoluble in water; therefore, a total of thirteen commonly used organic solvents have been selected in which the drug is soluble. Fresh stock solutions of TA in each solvent in a concentration of 1 × 10−4 M (2.62 mg%) were prepared for the assay. The method has been validated according to the guideline of International Conference on Harmonization and parameters like linearity, range, accuracy, precision, sensitivity, and robustness have been studied. Although the method was found to be efficient for the determination of TA in all solvents on the basis of statistical data 1-octanol, followed by ethanol and methanol, was found to be comparatively better than the other studied solvents. No change in the stock solution stability of TA has been observed in each solvent for 24 hours stored either at room (25 ± 1°C) or at refrigerated temperature (2–8°C). A shift in the absorption maxima has been observed for TA in various solvents indicating drug-solvent interactions. The studied method is simple, rapid, economical, accurate, and precise for the assay of TA in different organic solvents.
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18
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Shao HJ, Lou Z, Jeong JB, Kim KJ, Lee J, Lee SH. Tolfenamic Acid Suppresses Inflammatory Stimuli-Mediated Activation of NF-κB Signaling. Biomol Ther (Seoul) 2015; 23:39-44. [PMID: 25593642 PMCID: PMC4286748 DOI: 10.4062/biomolther.2014.088] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Revised: 10/03/2014] [Accepted: 10/07/2014] [Indexed: 12/20/2022] Open
Abstract
Tolfenamic acid (TA) is a traditional non-steroid anti-inflammatory drug (NSAID) and has been broadly used for the treatment of migraines. Nuclear factor kappa B (NF-κB) is a sequence-specific transcription factor and plays a key role in the development and progression of inflammation and cancer. We performed the current study to investigate the underlying mechanisms by which TA suppresses inflammation focusing on NF-κB pathway in TNF-α stimulated human normal and cancer cell lines and lipopolysaccharide (LPS)-stimulated mouse macrophages. Different types of human cells (HCT116, HT-29 and HEK293) and mouse macrophages (RAW264.7) were pre-treated with different concentrations of TA and then exposed to inflammatory stimuli such as TNF-α and LPS. Transcriptional activity of NF-κB, IκB-α-degradation, p65 translocation and mitogen-activated protein kinase (MAPK) activations were measured using luciferase assay and Western blots. Pre-treatment of TA repressed TNF-α- or LPS-stimulated NF-κB transactivation in a dose-dependent manner. TA treatment reduced degradation of IκB-α and subsequent translocation of p65 into nucleus. TA significantly down-regulated the phosphorylation of c-Jun N-terminal kinase (JNK). However, TA had no effect on NF-κB signaling and JNK phosphorylation in HT-29 human colorectal cancer cells. TA possesses anti-inflammatory activities through suppression of JNK/NF-κB pathway in different types of cells.
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Affiliation(s)
- Hong Jun Shao
- Department of Nutrition and Food Science, University of Maryland, College Park, MD, 20742, USA ; College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi'an, 741609, P. R. China
| | - Zhiyuan Lou
- Department of Nutrition and Food Science, University of Maryland, College Park, MD, 20742, USA
| | - Jin Boo Jeong
- Department of Bioresource Sciences, Andong National University, Andong, 760749, Republic of Korea
| | - Kui Jin Kim
- Department of Nutrition and Food Science, University of Maryland, College Park, MD, 20742, USA
| | - Jihye Lee
- Department of Nutrition and Food Science, University of Maryland, College Park, MD, 20742, USA
| | - Seong-Ho Lee
- Department of Nutrition and Food Science, University of Maryland, College Park, MD, 20742, USA
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19
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The preliminary study of effects of tolfenamic Acid on cell proliferation, cell apoptosis, and intracellular collagen deposition in keloid fibroblasts in vitro. Dermatol Res Pract 2014; 2014:736957. [PMID: 25328513 PMCID: PMC4190122 DOI: 10.1155/2014/736957] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 08/28/2014] [Accepted: 08/28/2014] [Indexed: 12/02/2022] Open
Abstract
Keloid scarring is a fibroproliferative disorder due to the accumulation of collagen type I. Tolfenamic acid (TA), a nonsteroidal anti-inflammatory drug, has been found to potentially affect the synthesis of collagen in rats. In this preliminary study, we aimed to test the effects of TA on cell proliferation, cell apoptosis, and the deposition of intracellular collagen in keloid fibroblasts. Normal fibroblasts (NFs) and keloid fibroblasts (KFs) were obtained from human dermis tissue. Within the dose range 10−3–10−6 M and exposure times 24 h, 48 h, and 72 h, we found that 0.55 × 10−3 M TA at 48 h exposure exhibited significantly decreased cell proliferation in both NFs and KFs. Under these experimental conditions, we demonstrated that (1) TA treatment induced a remarkable apoptotic rate in KFs compared to NFs; (2) TA treatment reduced collagen production in KFs versus NFs; (3) TA treatment decreased collagen type I expression in KFs comparing to that of NFs. In summary, our data suggest that TA decreases cell proliferation, induces cell apoptosis, and inhibits collagen accumulation in KFs.
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20
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Harn HJ, Chuang HM, Chang LF, Huang AYH, Hsieh ST, Lin SZ, Chou CW, Kuo YH, Chiou TW. Taiwanin A targets non-steroidal anti-inflammatory drug-activated gene-1 in human lung carcinoma. Fitoterapia 2014; 99:227-35. [PMID: 25173462 DOI: 10.1016/j.fitote.2014.08.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 08/19/2014] [Accepted: 08/21/2014] [Indexed: 01/20/2023]
Abstract
Taiwanin A (α,β-bis(piperonylidene)-γ-butyrolactone) is extracted from Taiwania cryptomerioides. Taiwanin A is extracted from tree bark and exhibits antitumor activity in breast, liver, and lung cancer cell lines. The objective of this study was to demonstrate the cytotoxicity of Taiwanin A against tumor cells by increasing the expression of non-steroidal anti-inflammatory drug-activated gene-1 (NAG-1). NAG-1 has been reported to exhibit antitumor and proapoptotic activities, suggesting potential use in cancer therapy. Inhibiting NAG-1 mRNA expression in A549 reduced the cytotoxicity caused by Taiwanin A. Furthermore, the c-Jun-N-terminal kinase/Ste20-related protein proline/alanine-rich kinase (JNK/SPAK) pathway played a key role in the influence of NAG-1 on cell viability, whereas the addition of the JNK pathway inhibitor SP600125 resulted in an inhibitory effect on NAG-1 and recovery of Taiwanin-A-treated cells. A xenograft tumor model demonstrated that Taiwanin A dose-dependently significantly decreases tumor-mediated growth in nude mice by increasing the NAG-1 expression accompanying tumor apoptosis. These data supported the hypothesis that Taiwanin A inhibits lung carcinoma growth by increasing NAG-1 expression through the JNK pathway both in vivo and in vitro. This result can contribute to a compound design for increasing cytotoxicity activity in the future.
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Affiliation(s)
- Horng-Jyh Harn
- Department of Pathology, China Medical University & Hospital, Taichung, Taiwan, ROC; Department of Medicine, China Medical University, Taichung, Taiwan, R.O.C
| | - Hong-Meng Chuang
- Department of Life Sciences, Agricultural Biotechnology Center, National Chung Hsing University, Taichung, Taiwan, R.O.C
| | - Li-Fu Chang
- Department of Life Science and Graduate Institute of Biotechnology, National Dong Hwa University, Hualien, Taiwan, R.O.C
| | - Angela Yu Hsuan Huang
- Department of Pathology, China Medical University & Hospital, Taichung, Taiwan, ROC; Department of Medicine, China Medical University, Taichung, Taiwan, R.O.C
| | - Shin-Ta Hsieh
- Department of Life Science and Graduate Institute of Biotechnology, National Dong Hwa University, Hualien, Taiwan, R.O.C
| | - Shinn-Zong Lin
- Center for Neuropsychiatry, China Medical University Hospital, Taichung, Taiwan, R.O.C; Department of Neurosurgery, China Medical University Beigan Hospital, Yunlin, Taiwan, R.O.C; Department of Neurosurgery, China Medical University -An Nan Hospital, Tainan, Taiwan, ROC; Graduate Institute of Immunology, China Medical University, Taichung, Taiwan, ROC
| | - Chih-Wei Chou
- Department of Department of Cosmeceutics, China Medical University, Taichung, Taiwan, ROC
| | - Yueh-Hsiung Kuo
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung, Taiwan, ROC
| | - Tzyy-Wen Chiou
- Department of Life Science and Graduate Institute of Biotechnology, National Dong Hwa University, Hualien, Taiwan, R.O.C.
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21
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Biological evaluation of bismuth non-steroidal anti-inflammatory drugs (BiNSAIDs): Stability, toxicity and uptake in HCT-8 colon cancer cells. J Inorg Biochem 2014; 135:28-39. [DOI: 10.1016/j.jinorgbio.2014.02.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 02/05/2014] [Accepted: 02/18/2014] [Indexed: 11/22/2022]
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22
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Chang JW, Kang SU, Choi JW, Shin YS, Baek SJ, Lee SH, Kim CH. Tolfenamic acid induces apoptosis and growth inhibition in anaplastic thyroid cancer: Involvement of nonsteroidal anti-inflammatory drug-activated gene-1 expression and intracellular reactive oxygen species generation. Free Radic Biol Med 2014; 67:115-30. [PMID: 24216474 DOI: 10.1016/j.freeradbiomed.2013.10.818] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Revised: 10/14/2013] [Accepted: 10/28/2013] [Indexed: 12/27/2022]
Abstract
Nonsteroidal anti-inflammatory drugs (NSAIDs) are usually used for the treatment of inflammatory diseases. However, certain NSAIDs also have antitumor activities in various cancers, including head and neck cancer, through cyclooxygenase-dependent or independent pathways. Nonsteroidal anti-inflammatory drug-activated gene-1 (NAG-1), a TGF-β superfamily protein, is induced by NSAIDs and has been shown to be induced by several antitumorigenic compounds and to exhibit proapoptotic and antitumorigenic activities. In this report, we demonstrate for the first time that tolfenamic acid (TA) transcriptionally induced the expression of NAG-1 during TA-induced apoptosis of anaplastic thyroid cancer (ATC) cells. TA reduced the viability of ATC cells in a dose-dependent manner and induced apoptosis, findings that were coincident with NAG-1 expression. Overexpression of the NAG-1 gene using cDNA enhanced the apoptotic effect of TA, whereas suppression of NAG-1 expression by small interfering RNA attenuated TA-induced apoptosis. Subsequently, we found that intracellular ROS generation plays an important role in activating the proapoptotic protein NAG-1. Then, we confirmed antitumorigenic effects of TA in a nude mouse orthotopic ATC model, and this result accompanied the augmentation of NAG-1 expression and ROS generation in tumor tissue. Taken together, these results demonstrate that TA induces apoptosis via NAG-1 expression and ROS generation in in vitro and in vivo ATC models, providing a novel mechanistic explanation and indicating a potential chemotherapeutic approach for treatment of ATC.
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MESH Headings
- Animals
- Anti-Inflammatory Agents, Non-Steroidal/pharmacology
- Antineoplastic Agents/pharmacology
- Apoptosis/drug effects
- Apoptosis/genetics
- Dose-Response Relationship, Drug
- Gene Expression Regulation, Neoplastic
- Growth Differentiation Factor 15/agonists
- Growth Differentiation Factor 15/antagonists & inhibitors
- Growth Differentiation Factor 15/genetics
- Growth Differentiation Factor 15/metabolism
- Humans
- Male
- Mice
- Mice, Nude
- Neoplasm Transplantation
- RNA, Small Interfering/genetics
- RNA, Small Interfering/metabolism
- Reactive Oxygen Species/agonists
- Reactive Oxygen Species/metabolism
- Signal Transduction
- Thyroid Carcinoma, Anaplastic/drug therapy
- Thyroid Carcinoma, Anaplastic/genetics
- Thyroid Carcinoma, Anaplastic/metabolism
- Thyroid Carcinoma, Anaplastic/pathology
- Thyroid Neoplasms/drug therapy
- Thyroid Neoplasms/genetics
- Thyroid Neoplasms/metabolism
- Thyroid Neoplasms/pathology
- ortho-Aminobenzoates/pharmacology
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Affiliation(s)
- Jae Won Chang
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon 442-749, Korea; Center for Cell Death-Regulating Biodrugs, School of Medicine, Ajou University, Suwon 442-749, Korea
| | - Sung Un Kang
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon 442-749, Korea; Center for Cell Death-Regulating Biodrugs, School of Medicine, Ajou University, Suwon 442-749, Korea
| | - Jae Won Choi
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon 442-749, Korea; Center for Cell Death-Regulating Biodrugs, School of Medicine, Ajou University, Suwon 442-749, Korea
| | - Yoo Seob Shin
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon 442-749, Korea; Center for Cell Death-Regulating Biodrugs, School of Medicine, Ajou University, Suwon 442-749, Korea
| | - Seung Joon Baek
- Department of Biomedical and Diagnostic Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37996, USA
| | - Seong-Ho Lee
- Department of Nutrition and Food Science, College of Agriculture and Natural Resources, University of Maryland, College Park, MD 20742, USA
| | - Chul-Ho Kim
- Department of Otolaryngology, School of Medicine, Ajou University, Suwon 442-749, Korea; Center for Cell Death-Regulating Biodrugs, School of Medicine, Ajou University, Suwon 442-749, Korea.
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23
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Non-thermal atmospheric pressure plasma induces apoptosis in oral cavity squamous cell carcinoma: Involvement of DNA-damage-triggering sub-G(1) arrest via the ATM/p53 pathway. Arch Biochem Biophys 2014; 545:133-40. [PMID: 24486404 DOI: 10.1016/j.abb.2014.01.022] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Revised: 01/08/2014] [Accepted: 01/22/2014] [Indexed: 11/23/2022]
Abstract
Recent advances in physics have made possible the use of non-thermal atmospheric pressure plasma (NTP) in cancer research. Although increasing evidence suggests that NTP induces death of various cancer cell types, thus offering a promising alternative treatment, the mechanism of its therapeutic effect is little understood. In this study, we report for the first time that NTP led to apoptotic cell death in oral cavity squamous cell carcinoma (OSCC). Interestingly, NTP induced a sub-G(1) arrest in p53 wild-type OSCCs, but not in p53-mutated OSCCs. In addition, NTP increased the expression levels of ATM, p53 (Ser 15, 20 and 46), p21, and cyclin D1. A comet assay, Western blotting and immunocytochemistry of γH2AX suggested that NTP-induced apoptosis and sub-G(1) arrest were associated with DNA damage and the ATM/p53 signaling pathway in SCC25 cells. Moreover, ATM knockdown using siRNA attenuated the effect of NTP on cell death, sub-G(1) arrest and related signals. Taken together, these results indicate that NTP induced apoptotic cell death in p53 wild-type OSCCs through a novel mechanism involving DNA damage and triggering of sub-G(1) arrest via the ATM/p53 pathway. These findings show the therapeutic potential of NTP in OSCC.
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Liggett JL, Zhang X, Eling TE, Baek SJ. Anti-tumor activity of non-steroidal anti-inflammatory drugs: cyclooxygenase-independent targets. Cancer Lett 2014; 346:217-24. [PMID: 24486220 DOI: 10.1016/j.canlet.2014.01.021] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 01/21/2014] [Accepted: 01/22/2014] [Indexed: 12/27/2022]
Abstract
Non-steroidal anti-inflammatory drugs (NSAIDs) are used extensively for analgesic and antipyretic treatments. In addition, NSAIDs reduce the risk and mortality to several cancers. Their mechanisms in anti-tumorigenesis are not fully understood, but both cyclooxygenase (COX)-dependent and -independent pathways play a role. We and others have been interested in elucidating molecular targets of NSAID-induced apoptosis. In this review, we summarize updated literature regarding cellular and molecular targets modulated by NSAIDs. Among those NSAIDs, sulindac sulfide and tolfenamic acid are emphasized in this review because these two drugs have been well investigated for their anti-tumorigenic activity in many different types of cancer.
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Affiliation(s)
- Jason L Liggett
- Department of Biomedical and Diagnostic Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37996 USA
| | - Xiaobo Zhang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Thomas E Eling
- Laboratory of Molecular Carcinogenesis, National Institutes of Environmental Health Sciences, NIH, Research Triangle Park, NC 27709, USA
| | - Seung Joon Baek
- Department of Biomedical and Diagnostic Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37996 USA.
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Sheraz MA, Ahmed S, Rehman IU. Effect of pH, polymer concentration and molecular weight on the physical state properties of tolfenamic acid. Pharm Dev Technol 2014; 20:352-60. [DOI: 10.3109/10837450.2013.871027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Zhang X, Lee SH, Min KW, McEntee MF, Jeong JB, Li Q, Baek SJ. The involvement of endoplasmic reticulum stress in the suppression of colorectal tumorigenesis by tolfenamic acid. Cancer Prev Res (Phila) 2013; 6:1337-47. [PMID: 24104354 DOI: 10.1158/1940-6207.capr-13-0220] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The nonsteroidal anti-inflammatory drug tolfenamic acid has been shown to suppress cancer cell growth and tumorigenesis in different cancer models. However, the underlying mechanism by which tolfenamic acid exerts its antitumorigenic effect remains unclear. Previous data from our group and others indicate that tolfenamic acid alters expression of apoptosis- and cell-cycle arrest-related genes in colorectal cancer cells. Here, we show that tolfenamic acid markedly reduced the number of polyps and tumor load in APC(min)(/+) mice, accompanied with cyclin D1 downregulation in vitro and in vivo. Mechanistically, tolfenamic acid promotes endoplasmic reticulum (ER) stress, resulting in activation of the unfolded protein response (UPR) signaling pathway, of which PERK-mediated phosphorylation of eukaryotic translation initiation factor 2α (eIF2α) induces the repression of cyclin D1 translation. Moreover, the PERK-eIF2α-ATF4 branch of the UPR pathway plays a role in tolfenamic acid-induced apoptosis in colorectal cancer cells, as silencing ATF4 attenuates tolfenamic acid-induced apoptosis. Taken together, these results suggest ER stress is involved in tolfenamic acid-induced inhibition of colorectal cancer cell growth, which could contribute to antitumorigenesis in a mouse model.
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Affiliation(s)
- Xiaobo Zhang
- College of Veterinary Medicine, University of Tennessee, 2407 River Drive, Knoxville, TN 37996-4542. Phone: 865-974-8216; Fax: 865-974-5616; ; Qingwang Li, College of Animal Science and Technology, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi 712100, People's Republic of China.
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Development and characterization of novel polyurethane films impregnated with tolfenamic acid for therapeutic applications. BIOMED RESEARCH INTERNATIONAL 2013; 2013:178973. [PMID: 24073394 PMCID: PMC3773997 DOI: 10.1155/2013/178973] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Accepted: 07/29/2013] [Indexed: 01/16/2023]
Abstract
The present study deals with the preparation of polyurethane (PU) films impregnated with a nonsteroidal anti-inflammatory drug, tolfenamic acid (TA). Solvent evaporation technique has been employed for the preparation of TA-PU films in two different ratios of 1 : 2 and 1 : 5 in Tetrahydrofuran (THF) or THF-ethanol mixtures. The prepared films were characterized using X-Ray Diffraction (XRD), Differential Scanning Calorimetry (DSC), Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), and release studies. The results indicate transformation of crystalline TA to its amorphous form. The degree of crystallinity changes both by increasing the polymer concentration and solvent used for the film preparations. The release profiles of TA were also found to be affected, showing a decrease from approximately 50% to 25% from 1 : 2 to 1 : 5 ratios, respectively.
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Jeong JB, Choi J, Baek SJ, Lee SH. Reactive oxygen species mediate tolfenamic acid-induced apoptosis in human colorectal cancer cells. Arch Biochem Biophys 2013; 537:168-75. [PMID: 23896517 DOI: 10.1016/j.abb.2013.07.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Revised: 07/08/2013] [Accepted: 07/11/2013] [Indexed: 01/22/2023]
Abstract
Several studies have shown substantial evidences that non-steroidal anti-inflammatory drugs (NSAIDs) exert anticancer effects by generating reactive oxygen species (ROS). Tolfenamic acid (TA) is one of the traditional NSAIDs widely used for treatment of migraine. TA has anti-cancer activities in several human cancer models. In this study, we report that generation of ROS by TA leads to apoptosis through modulation of several pathways in human colorectal cancer cells. TA induced rapid generation of intracellular ROS and led to an increase of phosphorylation of H2AX, a tail moment of comet and distribution of fragmented genomic DNA traces. Treatment of N-acetyl-l-cysteine (NAC) abolished TA-induced phosphorylation of H2AX and apoptosis. Treatment of TA resulted in an increase of nuclear factor-kappaB (NF-κB) transcriptional activity through inhibitor of kappa B (IκB-α) degradation and subsequent p65 nuclear translocation. In addition, TA increased apoptosis-inducing activating transcription factor 3 (ATF3) expression. However, the treatment of NAC abolished TA-mediated NF-κB activation and ATF3 expression and chemical inhibition of NF-κB or knockdown of p65 significantly attenuated TA-induced ATF3 expression. Our finding indicates that ROS-mediated DNA damage and subsequent activation of NF-κB and ATF3 expression plays a significant role in TA-induced apoptosis in human colorectal cancer cells.
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Affiliation(s)
- Jin Boo Jeong
- Department of Nutrition and Food Science, College of Agriculture and Natural Resources, University of Maryland, College Park, MD 20742, USA
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Zhang X, Min KW, Liggett J, Baek SJ. Disruption of the transforming growth factor-β pathway by tolfenamic acid via the ERK MAP kinase pathway. Carcinogenesis 2013; 34:2900-7. [PMID: 23864386 DOI: 10.1093/carcin/bgt250] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Transforming growth factor-β (TGF-β) modulates diverse cell physiological processes and plays a complicated role in tumor development. It has been well established that TGF-β inhibits cell proliferation in normal and early stage carcinoma and facilitates tumor metastasis in late-stage carcinoma. Therefore, blocking TGF-β signaling in advanced stage carcinogenesis provides a potentially interesting chemotherapeutic strategy. We aimed to determine the effect of tolfenamic acid (TA) on TGF-β-induced protumorigenic activity. Here, we demonstrate that TA attenuates tumor-promoting effects of TGF-β in cancer cells. Further observation indicates TA blocks the TGF-β/Smad pathway, and this blockage is mainly attributed to the interference of TGF-β1-driven phosphorylation of Smad2/3. We also show that TA could exert this effect on cancer cell lines from several different origins and that TA is much better than other non-steroidal anti-inflammatory drugs with respect to inhibition of TGF-β1-induced Smad2 phosphorylation. Finally, extracellular signal-regulated kinase mitogen-activated protein kinase plays a role in TA-induced suppression of Smad2/3 phosphorylation and subsequent nuclear accumulation of Smad2/3 in response to TGF-β1. Our study provides a possible mechanism by which TA affects anticancer activity by inhibiting the TGF-β pathway and sheds light on the application of TA for cancer patients.
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Affiliation(s)
- Xiaobo Zhang
- Department of Biomedical and Diagnostic Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37996, USA and
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Jeong JB, Yang X, Clark R, Choi J, Baek SJ, Lee SH. A mechanistic study of the proapoptotic effect of tolfenamic acid: involvement of NF-κB activation. Carcinogenesis 2013; 34:2350-60. [PMID: 23784084 DOI: 10.1093/carcin/bgt224] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Recent studies demonstrate that tolfenamic acid (TA) induces apoptosis and suppresses the development and progression of several types of cancers. However, the underlying mechanisms are complex and remain to be fully elucidated. Nuclear factor-kappaB (NF-κB) plays a critical role in inflammation, cancer development and progression. Although non-steroidal anti-inflammatory drugs modulate NF-κB signaling pathway in different ways, the link between NF-κB and TA-induced apoptosis of colorectal cancer cells has yet to be thoroughly investigated. In this study, we examined the effects of TA on the NF-κB pathway and apoptosis. TA activated NF-κB transcriptional activity and binding affinity of NF-κB to DNA. TA-induced NF-κB activation was mediated by an increased phosphorylation and proteosomal degradation of IκB-α and subsequent p65 nuclear translocation. We also observed that TA stabilized p65 and increased nuclear accumulation via an increase of p65 phosphorylation at Ser276 residue, which was mediated by p38 mitogen-activated protein kinase and extracellular signal-regulated kinase. The knockout of p53 blocked TA-induced transcriptional activation of NF-κB, but not the p65 nuclear accumulation. TA increased transcriptional activity of p53 and the binding affinity of p53 with p65, which are mediated by p38 mitogen-activated protein kinase and extracellular signal-regulated kinase-stimulated Ser276 phosphorylation. TA-induced apoptosis was ameliorated by the knockout of p65 and p53 and the point mutation of p65 at Ser276 residue. We demonstrate a novel molecular mechanism by which TA induced the NF-κB and apoptosis in human colorectal cancer cells.
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Affiliation(s)
- Jin Boo Jeong
- Department of Nutrition and Food Science, College of Agriculture and Natural Resources, University of Maryland, College Park, MD 20742, USA and
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Ahmed S, Sheraz MA, Rehman IU. Studies on tolfenamic acid-chitosan intermolecular interactions: effect of pH, polymer concentration and molecular weight. AAPS PharmSciTech 2013; 14:870-9. [PMID: 23620261 DOI: 10.1208/s12249-013-9974-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Accepted: 04/16/2013] [Indexed: 11/30/2022] Open
Abstract
Solid-state properties of tolfenamic acid (TA) and its complexes with chitosan (CT) have been studied. Effect of medium pH, molecular weight of polymer and its different concentrations on these TA-CT complexes were studied in detail. Low and medium molecular weight CT have been used in different ratios at pH ranging from 4 to 6 and freeze-drying technique has been employed to modify the appearance of crystalline TA. Physical properties of the formed complexes have been studied by employing X-ray diffraction, differential scanning calorimetry and scanning electron microscopy; chemical structure has been studied using Fourier transform infrared spectroscopy. The results showed that both forms of the polymer exhibited complete conversion in 1:8 ratio at pH 4, 1:4 at pH 5 and 1:1 at pH 6 indicating a marked effect of pH on drug-polymer complexation. The percent crystallinity calculations indicated low molecular weight CT slightly more effective than the other form. No changes in the complexes have been observed during the 12 week storage under controlled conditions. Both forms of CT at different pH values indicated retardation of recrystallization in TA during cooling of the melt from 1:1 ratios exhibiting formation of strong intermolecular hydrogen bonding between the drug and the polymer.
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