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Yerlikaya S, Djamgoz MB. Oleamide, a Sleep-Inducing Compound: Effects on Ion Channels and Cancer. Bioelectricity 2022. [DOI: 10.1089/bioe.2022.0010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Serife Yerlikaya
- Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Turkey
| | - Mustafa B.A. Djamgoz
- Department of Life Sciences, Imperial College London, London, United Kingdom
- Biotechnology Research Center, Cyprus International University, Haspolat, Nicosia, TRNC, Mersin 10, Turkey
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Oleamide Induces Cell Death in Glioblastoma RG2 Cells by a Cannabinoid Receptor-Independent Mechanism. Neurotox Res 2020; 38:941-956. [PMID: 32930995 DOI: 10.1007/s12640-020-00280-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 08/06/2020] [Accepted: 08/27/2020] [Indexed: 12/30/2022]
Abstract
The endocannabinoid system has been associated with antiproliferative effects in several types of tumors through cannabinoid receptor-mediated cell death mechanisms. Oleamide (ODA) is a CB1/CB2 agonist associated with cell growth and migration by adhesion and/or ionic signals associated with Gap junctions. Antiproliferative mechanisms related to ODA remain unknown. In this work, we evaluated the effects of ODA on cell viability and morphological changes in a rat RG2 glioblastoma cell line and compared these effects with primary astrocyte cultures from 8-day postnatal rats. RG2 and primary astrocyte cultures were treated with ODA at increasing concentrations (25, 50, 100, and 200 μM) for different periods of time (12, 24, and 48 h). Changes in RG2 cell viability and morphology induced by ODA were assessed by viability/mitochondrial activity test and phase contrast microscopy, respectively. The ratios of necrotic and apoptotic cell death, and cell cycle alterations, were evaluated by flow cytometry. The roles of CB1 and CB2 receptors on ODA-induced changes were explored with specific receptor antagonists. ODA (100 μM) induced somatic damage, detachment of somatic bodies, cytoplasmic polarization, and somatic shrinkage in RG2 cells at 24 and 48 h. In contrast, primary astrocytes treated at the same ODA concentrations exhibited cell aggregation but not cell damage. ODA (100 μM) increased apoptotic cell death and cell arrest in the G1 phase at 24 h in the RG2 line. The effects induced by ODA on cell viability of RG2 cells were independent of CB1 and CB2 receptors or changes in intracellular calcium transient. Results of this novel study suggest that ODA exerts specific antiproliferative effects on RG2 glioblastoma cells through unconventional apoptotic mechanisms not involving canonical signals.
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Maya-López M, Rubio-López LC, Rodríguez-Alvarez IV, Orduño-Piceno J, Flores-Valdivia Y, Colonnello A, Rangel-López E, Túnez I, Prospéro-García O, Santamaría A. A Cannabinoid Receptor-Mediated Mechanism Participates in the Neuroprotective Effects of Oleamide Against Excitotoxic Damage in Rat Brain Synaptosomes and Cortical Slices. Neurotox Res 2019; 37:126-135. [DOI: 10.1007/s12640-019-00083-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 06/13/2019] [Accepted: 06/24/2019] [Indexed: 12/20/2022]
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Pannkuk EL, Laiakis EC, Gill K, Jain SK, Mehta KY, Nishita D, Bujold K, Bakke J, Gahagen J, Authier S, Chang P, Fornace AJ. Liquid Chromatography-Mass Spectrometry-Based Metabolomics of Nonhuman Primates after 4 Gy Total Body Radiation Exposure: Global Effects and Targeted Panels. J Proteome Res 2019; 18:2260-2269. [PMID: 30843397 DOI: 10.1021/acs.jproteome.9b00101] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Rapid assessment of radiation signatures in noninvasive biofluids may aid in assigning proper medical treatments for acute radiation syndrome (ARS) and delegating limited resources after a nuclear disaster. Metabolomic platforms allow for rapid screening of biofluid signatures and show promise in differentiating radiation quality and time postexposure. Here, we use global metabolomics to differentiate temporal effects (1-60 d) found in nonhuman primate (NHP) urine and serum small molecule signatures after a 4 Gy total body irradiation. Random Forests analysis differentially classifies biofluid signatures according to days post 4 Gy exposure. Eight compounds involved in protein metabolism, fatty acid β oxidation, DNA base deamination, and general energy metabolism were identified in each urine and serum sample and validated through tandem MS. The greatest perturbations were seen at 1 d in urine and 1-21 d in serum. Furthermore, we developed a targeted liquid chromatography tandem mass spectrometry (LC-MS/MS) with multiple reaction monitoring (MRM) method to quantify a six compound panel (hypoxanthine, carnitine, acetylcarnitine, proline, taurine, and citrulline) identified in a previous training cohort at 7 d after a 4 Gy exposure. The highest sensitivity and specificity for classifying exposure at 7 d after a 4 Gy exposure included carnitine and acetylcarnitine in urine and taurine, carnitine, and hypoxanthine in serum. Receiver operator characteristic (ROC) curve analysis using combined compounds show excellent sensitivity and specificity in urine (area under the curve [AUC] = 0.99) and serum (AUC = 0.95). These results highlight the utility of MS platforms to differentiate time postexposure and acquire reliable quantitative biomarker panels for classifying exposed individuals.
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Affiliation(s)
- Evan L Pannkuk
- Department of Oncology, Lombardi Comprehensive Cancer Center , Georgetown University Medical Center , Washington, D.C. 20007 , United States
| | - Evagelia C Laiakis
- Department of Oncology, Lombardi Comprehensive Cancer Center , Georgetown University Medical Center , Washington, D.C. 20007 , United States.,Department of Biochemistry and Molecular & Cellular Biology , Georgetown University Medical Center , Washington, D.C. 20007 , United States
| | - Kirandeep Gill
- Department of Biochemistry and Molecular & Cellular Biology , Georgetown University Medical Center , Washington, D.C. 20007 , United States
| | - Shreyans K Jain
- Department of Biochemistry and Molecular & Cellular Biology , Georgetown University Medical Center , Washington, D.C. 20007 , United States
| | - Khyati Y Mehta
- Department of Oncology, Lombardi Comprehensive Cancer Center , Georgetown University Medical Center , Washington, D.C. 20007 , United States
| | - Denise Nishita
- SRI International , Menlo Park , California 94025 , United States
| | - Kim Bujold
- Citoxlab North America , Laval , QC H7V 4B3 , Canada
| | - James Bakke
- SRI International , Menlo Park , California 94025 , United States
| | - Janet Gahagen
- SRI International , Menlo Park , California 94025 , United States
| | - Simon Authier
- Citoxlab North America , Laval , QC H7V 4B3 , Canada
| | - Polly Chang
- SRI International , Menlo Park , California 94025 , United States
| | - Albert J Fornace
- Department of Oncology, Lombardi Comprehensive Cancer Center , Georgetown University Medical Center , Washington, D.C. 20007 , United States.,Department of Biochemistry and Molecular & Cellular Biology , Georgetown University Medical Center , Washington, D.C. 20007 , United States
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Feng Y, Wang L, Liu X, Wu Q, Zhang H, Hu F, Sun X. Human corticotrophin releasing factor inhibits cell proliferation and promotes apoptosis through upregulation of tumor protein p53 in human glioma. Oncol Lett 2018; 15:8378-8386. [PMID: 29805572 PMCID: PMC5950518 DOI: 10.3892/ol.2018.8406] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 04/21/2017] [Indexed: 11/28/2022] Open
Abstract
Corticotropin-releasing factor (CRF) and its receptors have been detected in numerous tumors and have an important role in tumorigenesis and proliferation. However, the role of these peptides has not been established in human glioma and malignant glioma cell lines. The present study evaluated for the first time, the expression of CRF receptor 1 (CRFR1) in 35 human glioma samples, 13 normal brain tissues and human U87 glioma cells using immunohistochemistry, reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and western blot analysis. Levels of CRFR1 were identified to be significantly increased in human glioma and U87 cells and higher levels of CRFR1 were observed in glioma tissues of higher grade. The biological functions of human CRF (hCRF) on U87 cells glioma cells were investigated by cell counting, a bromodeoxyuridine assay and flow cytometry. The U87 cells under hCRF treatment exhibited reduced proliferation, increased apoptosis and a cell cycle arrest in S and G2/M phase. The tumor protein p53 (p53) gene may participate in the activation of hCRF via CRFR1 in U87 cells, therefore p53 mRNA and protein were evaluated using RT-qPCR and western blot analysis. Finally, the present results suggest that hCRF inhibits proliferation and induces cell-cycle arrest and apoptosis in U87 cells via the CRFR1-mediated p53 signaling pathway. Therefore, the present study also suggests that hCRF may be used therapeutically, and CRFR1 may be a putative therapeutic target for human glioma.
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Affiliation(s)
- Yan Feng
- Department of Neurosurgery, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Liqun Wang
- Department of Neurosurgery, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Xin Liu
- Department of Neurosurgery, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Qiang Wu
- Department of Neurosurgery, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Haofeng Zhang
- Department of Neurosurgery, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Fuguang Hu
- Department of Neurosurgery, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Xiaofeng Sun
- Department of Neurosurgery, Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
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Rehman MU, Jawaid P, Zhao QL, Li P, Narita K, Katoh T, Shimizu T, Kondo T. Low-dose spiruchostatin-B, a potent histone deacetylase inhibitor enhances radiation-induced apoptosis in human lymphoma U937 cells via modulation of redox signaling. Free Radic Res 2016; 50:596-610. [PMID: 27108737 DOI: 10.3109/10715762.2015.1115029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Spiruchostatin B (SP-B), is a potent histone deacetylase (HDAC) inhibitor, in addition to HDAC inhibition, the pharmacological effects of SP-B are also attributed to its ability to produce intracellular reactive oxygen species (ROS), particularly H2O2. In this study, we investigated the effects of low dose (non-toxic) SP-B on radiation-induced apoptosis in human lymphoma U937 cells in vitro. The treatment of cells with low-dose SP-B induced the acetylation of histones, however, does not induce apoptosis. Whereas, the combined treatment with SP-B and radiation significantly enhanced the radiation-induced apoptosis, suggesting the potential role of this combined treatment for future radiation therapy. Interestingly, the enhancement of apoptosis was accompanied by significant increased in the ROS generation. Pre-treatment with an antioxidant, N-acetyl-l-cysteine (NAC) significantly inhibited the enhancement of apoptosis induced by combined treatment, indicating that ROS play an essential role. It was also found that SP-B combined with radiation caused the activation of death receptor and intrinsic apoptotic pathways, via modulation of ROS-mediated signaling. Moreover, SP-B also significantly enhanced the radiation-induced apoptosis in other lymphoma cell lines such as Molt-4 and HL-60. Taken together, our findings suggest that the low-dose SP-B enhances radiation-induced apoptosis via modulation of redox signaling because of its ability to serve as an intracellular ROS generating agent, mainly (H2O2 or [Formula: see text]). This study provides further insights into the mechanism of action of SP-B with radiation and demonstrates that SP-B can be used as a future novel sensitizer for radiation therapy.
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Affiliation(s)
- Mati Ur Rehman
- a Department of Radiological Sciences, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama , Toyama , Japan
| | - Paras Jawaid
- a Department of Radiological Sciences, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama , Toyama , Japan
| | - Qing Li Zhao
- a Department of Radiological Sciences, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama , Toyama , Japan
| | - Peng Li
- a Department of Radiological Sciences, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama , Toyama , Japan
| | - Koichi Narita
- b Laboratory of Synthetic and Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University , Aoba-ku, Sendai , Japan
| | - Tadashi Katoh
- b Laboratory of Synthetic and Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Tohoku Pharmaceutical University , Aoba-ku, Sendai , Japan
| | - Tadamichi Shimizu
- c Department of Dermatology, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama , Toyama , Japan
| | - Takashi Kondo
- a Department of Radiological Sciences, Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama , Toyama , Japan
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Pei J, Park IH, Ryu HH, Li SY, Li CH, Lim SH, Wen M, Jang WY, Jung S. Sublethal dose of irradiation enhances invasion of malignant glioma cells through p53-MMP 2 pathway in U87MG mouse brain tumor model. Radiat Oncol 2015; 10:164. [PMID: 26245666 PMCID: PMC4554349 DOI: 10.1186/s13014-015-0475-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 07/26/2015] [Indexed: 02/27/2023] Open
Abstract
Background Glioblastoma is a highly lethal neoplasm that frequently recurs locally after radiotherapy, and most of these recurrences originate from near the irradiated target field. In the present study, we identified the effects of radiation on glioma invasion and p53, TIMP-2, and MMP-2 expression through in vitro and in vivo experiments. Methods The U87MG (wt p53) and U251 (mt p53) human malignant glioma cell lines were prepared, and the U2OS (wt 53) and Saos2 (del p53) osteosarcoma cell lines were used as p53 positive and negative controls. The four cell lines and p53 knock-downed U87MG cells received radiation (2–6 Gy) and were analyzed for expression of p53 and TIMP-2 by Western blot, and MMP-2 activity was detected by zymography. In addition, the effects of irradiation on directional invasion of malignant glioma were evaluated by implanting nude mice with bioluminescent u87-Fluc in vivo followed by MMP-2, p53, and TIMP-2 immunohisto-chemistry and in situ zymography. Results MMP-2 activity and p53 expression increased in proportional to the radiation dose in cell lines with wt p53, but not in the cell lines with del or mt p53. TIMP-2 expression did not increase in U87MG cells. MMP-2 activity decreased in p53 knock-downed U87MG cells but increased in the control group. Furthermore, radiation enhanced MMP-2 activity and increased tumor margin invasiveness in vivo. Tumor cells invaded by radiation overexpressed MMP-2 and p53 and revealed high gelatinolytic activity compared with those of non-radiated tumor cells. Conclusion Radiation-induced upregulation of p53 modulated MMP-2 activity, and the imbalance between MMP-2 and TIMP-2 may have an important role in glioblastoma invasion by degrading the extracellular matrix. Bioluminescent “U87-Fluc”was useful for observing tumor formation without sacrifice after implanting tumor cells in the mouse brain. These findings suggest that the radiotherapy involved field for malignant glioma needs to be reconsidered, and that future trials should investigate concurrent pharmacologic therapies that inhibit invasion associated with radiotherapy. Electronic supplementary material The online version of this article (doi:10.1186/s13014-015-0475-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jian Pei
- Department of Neurosurgery, Chonnam National University Hwasun Hospital and Mediacal School, 322 Seoyang-ro, Hwasun-eup, Hwasun-gun, Jeonnam, 519-763, Republic of Korea
| | - In-Ho Park
- Department of Neurosurgery, Chonnam National University Hwasun Hospital and Mediacal School, 322 Seoyang-ro, Hwasun-eup, Hwasun-gun, Jeonnam, 519-763, Republic of Korea
| | - Hyang-Hwa Ryu
- Brain Tumor Research Laboratory, and Chonnam National University Research Institute of Medical Sciences, Chonnam National University Hwasun Hospital and Medical School, 322 Seoyang-ro, Hwasun-eup, Hwasun-gun, Jeonnam, 519-763, Republic of Korea
| | - Song-Yuan Li
- Brain Tumor Research Laboratory, and Chonnam National University Research Institute of Medical Sciences, Chonnam National University Hwasun Hospital and Medical School, 322 Seoyang-ro, Hwasun-eup, Hwasun-gun, Jeonnam, 519-763, Republic of Korea
| | - Chun-Hao Li
- Brain Tumor Research Laboratory, and Chonnam National University Research Institute of Medical Sciences, Chonnam National University Hwasun Hospital and Medical School, 322 Seoyang-ro, Hwasun-eup, Hwasun-gun, Jeonnam, 519-763, Republic of Korea
| | - Sa-Hoe Lim
- Department of Neurosurgery, Chonnam National University Hwasun Hospital and Mediacal School, 322 Seoyang-ro, Hwasun-eup, Hwasun-gun, Jeonnam, 519-763, Republic of Korea.,Brain Tumor Research Laboratory, and Chonnam National University Research Institute of Medical Sciences, Chonnam National University Hwasun Hospital and Medical School, 322 Seoyang-ro, Hwasun-eup, Hwasun-gun, Jeonnam, 519-763, Republic of Korea
| | - Min Wen
- Brain Tumor Research Laboratory, and Chonnam National University Research Institute of Medical Sciences, Chonnam National University Hwasun Hospital and Medical School, 322 Seoyang-ro, Hwasun-eup, Hwasun-gun, Jeonnam, 519-763, Republic of Korea
| | - Woo-Youl Jang
- Department of Neurosurgery, Chonnam National University Hwasun Hospital and Mediacal School, 322 Seoyang-ro, Hwasun-eup, Hwasun-gun, Jeonnam, 519-763, Republic of Korea
| | - Shin Jung
- Department of Neurosurgery, Chonnam National University Hwasun Hospital and Mediacal School, 322 Seoyang-ro, Hwasun-eup, Hwasun-gun, Jeonnam, 519-763, Republic of Korea. .,Brain Tumor Research Laboratory, and Chonnam National University Research Institute of Medical Sciences, Chonnam National University Hwasun Hospital and Medical School, 322 Seoyang-ro, Hwasun-eup, Hwasun-gun, Jeonnam, 519-763, Republic of Korea.
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Ryu HW, Jeong SH, Curtis-Long MJ, Jung S, Lee JW, Woo HS, Cho JK, Park KH. Inhibition effects of mangosenone F from Garcinia mangostana on melanin formation in B16F10 cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:8372-8378. [PMID: 22779928 DOI: 10.1021/jf3015987] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Melanogenesis can be controlled by tyrosinase inhibition or by blocking the maturation processes of tyrosinase and its related proteins. Mangostenone F was isolated from the seedcases of Garcinia mangostana . Mangostenone F was shown to be inactive against tyrosinase (IC50 > 200 μM) but was a potent α-glucosidase inhibitor in vitro (IC50 = 21.0 μM). Mangostenone F was found to inhibit production of melanin in the mouse melanoma cell line B16F10. Importantly, unlike most glycosidase inhibitors, mangostenone F displayed very low cytotoxicity (EC50 > 200 μM). The Western blot for expression levels of proteins involved in melanogenesis showed that mangostenone F down-regulated tyrosinase and TRP-2 expression. Treating B16F10 cells with mangostenone F significantly increased the susceptibility of tyrosinase to endoglycosidase H digestion, indicating that tyrosinase was unable to mature fully and pass to the trans-golgi apparatus. Consistent with these data, in lysate assays, mangostenone F was shown to be a better inhibitor of α-glucosidases than deoxynojirimycin, a representative glycosidase inhibitor.
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Affiliation(s)
- Hyung Won Ryu
- Division of Applied Life Science (BK21 Program), IALS, Graduate School of Gyeongsang National University , Jinju 660-701, Republic of Korea
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Seo HR, Seo WD, Pyun BJ, Lee BW, Jin YB, Park KH, Seo EK, Lee YJ, Lee YS. Radiosensitization by celastrol is mediated by modification of antioxidant thiol molecules. Chem Biol Interact 2011; 193:34-42. [PMID: 21570383 DOI: 10.1016/j.cbi.2011.04.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Revised: 04/26/2011] [Accepted: 04/27/2011] [Indexed: 12/29/2022]
Abstract
The radiosensitizing effects of naturally occurring triterpenes were investigated in human lung cancer cells. Several quinone methide-containing triterpenes (QMTs) enhanced the cytotoxic effect of ionizing radiation (IR) and of these QMTs, celastrol (CE) had the greatest enhancing effect on IR-induced cell death in vitro. Additionally, the quinone methide moiety of CE was shown to be essential for CE-mediated radiosensitization; in contrast, dihydrocelastrol (DHCE), does not contain this moiety. Reactive oxygen species (ROS) production by IR was augmented in combination with CE, which was responsible for CE-mediated radiosensitization. CE induced the thiol reactivity and inhibited the activities of antioxidant molecules, such as thioredoxin reductase and glutathione. In vivo, nude mouse xenografting data also revealed that tumor growth delay was greater in mice treated with CE plus IR, compared with those treated with CE or IR alone. When DHCE, instead of CE, was combined with IR, tumor growth delay was similar to that in IR alone-treated mice. These results demonstrate that CE synergistically enhances the effects of IR and suggest the novel anticancer therapeutic use of CE in combination with radiation therapy.
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Affiliation(s)
- Haeng Ran Seo
- Division of Radiation Effects, Korea Institute of Radiological and Medical Sciences, Seoul, Republic of Korea
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Kim TH, Seo WD, Ryu HW, Seo HR, Jin YB, Lee M, Ji YH, Park KH, Lee YS. Anti-tumor effects by a synthetic chalcone compound is mediated by c-Myc-mediated reactive oxygen species production. Chem Biol Interact 2010; 188:111-8. [PMID: 20620131 DOI: 10.1016/j.cbi.2010.06.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Revised: 06/28/2010] [Accepted: 06/30/2010] [Indexed: 11/24/2022]
Abstract
Overexpression of c-Myc represents the most frequently deregulated genetic event in cancer, and therefore c-Myc may represent a good molecular target for cancer therapy. The human lung carcinoma cell line, NCI-H1299, shows resistance to conventional cancer treatments, such as ionizing radiation (IR) and cisplatin, while the lung carcinoma cell line, NCI-H460, is sensitive to treatment with these agents. However, when treated with a chalcone compound [toluenesulfonylamido-chalcone, 4'-(p-toluene sulfonyl amino)-3,4-dihydroxy chalcone (TSHDC)], cell death was dramatically induced in NCI-H1299 cells as compared to NCI-H460 cells. TSHDC-mediated cytotoxicity was not dependent on the status of p53 and p21. However, TSHDC exerted increased c-Myc-dependent reactive oxygen species (ROS) production in NCI-H1299 cells in which c-Myc is overexpressed, while increased ROS production did not occur in A549 or NCI-H460 cells with a low c-Myc level. Several colon and brain cancer cells also showed a correlation between c-Myc expression and TSHDC-mediated increased cell death. Tumor regression by TSHDC was more dramatic in NCI-H1299 cells than NCI-H460 cells, when these cells were grafted to nude mice. However, in the case of IR and cisplatin, NCI-H460 cells were more sensitive than NCI-H1299 cells. From these results, c-Myc-mediated ROS production may be a good target for screening of novel cancer drugs and TSHDC might be a good candidate as a cancer drug, specifically in cancer cells that overexpress c-Myc.
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Affiliation(s)
- Tae-Hee Kim
- Division of Radiation Effects, Korea Institute of Radiological and Medical Sciences, 215-4 Gongneung-Dong, Nowon-Ku, Seoul 139-706, Republic of Korea
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Lu Y, Jiang F, Jiang H, Wu K, Zheng X, Cai Y, Katakowski M, Chopp M, To SST. Gallic acid suppresses cell viability, proliferation, invasion and angiogenesis in human glioma cells. Eur J Pharmacol 2010; 641:102-7. [PMID: 20553913 DOI: 10.1016/j.ejphar.2010.05.043] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Revised: 04/20/2010] [Accepted: 05/22/2010] [Indexed: 10/19/2022]
Abstract
Gallic acid, an organic acid, also known as 3,4,5-trihydroxybenzoic acid, is cytotoxic against certain cancer cells, without harming normal cells. The objective of this study is to evaluate whether gallic acid can inhibit glioma cell viability, proliferation, invasion and reduce glioma cell mediated angiogenesis. Treatment of U87 and U251n glioma cells with gallic acid inhibited cell viability in a dose-dependent manner. BrdU and tube formation assays indicated that gallic acid significantly decreased glioma cell proliferation and tube formation in mouse brain endothelial cells, respectively. In addition, gallic acid decreased U87 cell invasion in vitro. Western blot analysis showed that expression of ADAM17, p-Akt and p-Erk was suppressed by gallic acid in both U87 and U251n cell lines. These data suggest that suppression of ADAM17 and downregulation of PI3K/Akt and Ras/MAPK signaling pathways may contribute to gallic acid-induced decrease of invasiveness. Gallic acid may be a valuable candidate for treatment of brain tumor.
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Affiliation(s)
- Yong Lu
- Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong S.A.R., People's Republic of China
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Seo WD, Ryu YB, Curtis-Long MJ, Lee CW, Ryu HW, Jang KC, Park KH. Evaluation of anti-pigmentary effect of synthetic sulfonylamino chalcone. Eur J Med Chem 2010; 45:2010-7. [PMID: 20149498 DOI: 10.1016/j.ejmech.2010.01.049] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Revised: 01/14/2010] [Accepted: 01/20/2010] [Indexed: 01/27/2023]
Abstract
The 4'-(p-toluenesulfonylamino)-4-hydroxychalcone (TSAHC), which bears inhibitory chemotypes for both alpha-glucosidase and tyrosinase, was evaluated for tyrosinase activity and depigmenting ability relative to compounds designed to only target tyrosianse activity. TSAHC emerged to be a competitive reversible inhibitor of mushroom tyrosinase. More importantly, it was also able to return the melanin content of alpha-melanocyte stimulated by alpha-MSH to base levels unlike other inhibitors that only targeted tyrosinase. The Western blot for expression levels of proteins involved in melanogenesis showed that TSAHC significantly decreased three main tyrosinase related protein in melanin biosynthesis, tyrosinase, TRP-1 and TRP-2.
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Affiliation(s)
- Woo Duck Seo
- Department of Functional Crop, NICS, RDA, Miryang 627-803, Republic of Korea
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Investigating Effective Combinations of Anti-cancer Drugs and Radiation Therapy for Treating Non-small Cell Lung Cancer with Using Two Cell Lines. ACTA ACUST UNITED AC 2009. [DOI: 10.6058/jlc.2009.8.1.21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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