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Wen ZH, Chang L, Yang SN, Yu CL, Tung FY, Kuo HM, Lu IC, Wu CY, Shih PC, Chen WF, Chen NF. The anti-angiogenic and anti-vasculogenic mimicry effects of GN25 in endothelial and glioma cells. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2024; 1871:119799. [PMID: 39043304 DOI: 10.1016/j.bbamcr.2024.119799] [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: 01/10/2024] [Revised: 06/12/2024] [Accepted: 06/27/2024] [Indexed: 07/25/2024]
Abstract
BACKGROUND AND PURPOSE Scientists have been exploring anti-angiogenic strategies to inhibit angiogenesis and prevent tumor growth. Vasculogenic mimicry (VM) in glioblastoma multiforme (GBM) poses a challenge, complicating anti-angiogenesis therapy. A novel drug, GN25 (3-[{1,4-dihydro-5,8-dimethoxy-1,4-dioxo-2-naphthalenyl}thio]-propanoic acid), can inhibit tumor formation. This study aims to investigate the microenvironmental effects and molecular mechanisms of GN25 in anti-angiogenesis and anti-VM. EXPERIMENTAL APPROACH MTT (3-(4,5-dimethylthiazolyl-2)-2,5-diphenyltetrazolium bromide) assay was used to evaluate the cell viability of different concentrations of GN25 in human umbilical vein endothelial cells (HUVEC) and Uppsala 87 malignant glioma (U87MG) cells. Functional assays were used to investigate the effects of GN25 on angiogenesis-related processes, whereas gelatin zymography, enzyme-linked immunosorbent assays, and Western blotting were utilized to assess the influence on matrix metalloproteinase (MMP)-2 and vascular endothelial growth factor (VEGF) secretion and related signaling pathways. KEY RESULTS GN25 suppressed migration, wound healing, and tube formation in HUVECs and disrupted angiogenesis in a rat aorta ring and zebrafish embryo model. GN25 dose-dependently reduced phosphatidylinositol 3-kinase/AKT and inhibited MMP-2/VEGF secretion in HUVECs. In U87MG cells, GN25 inhibited migration, wound healing, and VM, accompanied by a decrease in MMP-2 and VEGF secretion. The results indicate that GN25 effectively inhibits angiogenesis and VM formation in HUVECs and U87MG cells without affecting preexisting vascular structures. CONCLUSION AND IMPLICATIONS This study elaborated GN25's potential as an anti-angiogenic agent by elucidating its inhibitory effects on classical angiogenesis. VM provides valuable insights for developing novel therapeutic strategies against tumor progression and angiogenesis-related diseases. These results indicate the potential of GN25 as a promising candidate for angiogenesis-related diseases.
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Affiliation(s)
- Zhi-Hong Wen
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan; Institute of BioPharmaceutical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Long Chang
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - San-Nan Yang
- Department of Pediatrics, E-Da Hospital, I-Shou University, Kaohsiung 82445, Taiwan; School of Medicine for International Students, College of Medicine, I-Shou University, Kaohsiung 82445, Taiwan
| | - Chen-Ling Yu
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Fang-Yu Tung
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Hsiao-Mei Kuo
- Department of Neurosurgery, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung 833301, Taiwan
| | - I-Chen Lu
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung, Taiwan
| | - Chang-Yi Wu
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung, Taiwan; Department of Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Po-Chang Shih
- Institute of BioPharmaceutical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Wu-Fu Chen
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung, Taiwan; Department of Neurosurgery, Kaohsiung Chang Gung Memorial Hospital, Chang Gung University College of Medicine, Kaohsiung 833301, Taiwan.
| | - Nan-Fu Chen
- Division of Neurosurgery, Department of Surgery, Kaohsiung Armed Forces General Hospital, Kaohsiung 80284, Taiwan.
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Dong S, Chen Z, Wang L, Liu Y, Stagos D, Lin X, Liu M. Marine Bromophenol Bis(2,3,6-Tribromo-4,5-Dihydroxybenzyl)ether Inhibits Angiogenesis in Human Umbilical Vein Endothelial Cells and Reduces Vasculogenic Mimicry in Human Lung Cancer A549 Cells. Mar Drugs 2021; 19:641. [PMID: 34822512 PMCID: PMC8617710 DOI: 10.3390/md19110641] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/08/2021] [Accepted: 11/12/2021] [Indexed: 12/11/2022] Open
Abstract
Angiogenesis, including the growth of new capillary blood vessels from existing ones and the malignant tumors cells formed vasculogenic mimicry, is quite important for the tumor metastasis. Anti-angiogenesis is one of the significant therapies in tumor treatment, while the clinical angiogenesis inhibitors usually exhibit endothelial cells dysfunction and drug resistance. Bis(2,3,6-tribromo-4,5-dihydroxybenzyl)ether (BTDE), a marine algae-derived bromophenol compound, has shown various biological activities, however, its anti-angiogenesis function remains unknown. The present study illustrated that BTDE had anti-angiogenesis effect in vitro through inhibiting human umbilical vein endothelial cells migration, invasion, tube formation, and the activity of matrix metalloproteinases 9 (MMP9), and in vivo BTDE also blocked intersegmental vessel formation in zebrafish embryos. Moreover, BTDE inhibited the migration, invasion, and vasculogenic mimicry formation of lung cancer cell A549. All these results indicated that BTDE could be used as a potential candidate in anti-angiogenesis for the treatment of cancer.
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Affiliation(s)
- Songtao Dong
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (S.D.); (Z.C.); (L.W.); (Y.L.)
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| | - Zhongyuan Chen
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (S.D.); (Z.C.); (L.W.); (Y.L.)
| | - Li Wang
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (S.D.); (Z.C.); (L.W.); (Y.L.)
| | - Yankai Liu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (S.D.); (Z.C.); (L.W.); (Y.L.)
| | - Dimitrios Stagos
- Department of Biochemistry and Biotechnology, School of Health Sciences, University of Thessaly, Biopolis, 41500 Larissa, Greece;
| | - Xiukun Lin
- Department of Pharmacology, School of Pharmacy, Southwest Medical University, 319 Zhongshan Road, Jiangyang, Luzhou 646000, China;
| | - Ming Liu
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, 5 Yushan Road, Qingdao 266003, China; (S.D.); (Z.C.); (L.W.); (Y.L.)
- Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
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Wang G, Lin F, Wan Q, Wu J, Luo M. Mechanisms of action of metformin and its regulatory effect on microRNAs related to angiogenesis. Pharmacol Res 2020; 164:105390. [PMID: 33352227 DOI: 10.1016/j.phrs.2020.105390] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 12/07/2020] [Accepted: 12/12/2020] [Indexed: 02/07/2023]
Abstract
Angiogenesis is rapidly initiated in response to pathological conditions and is a key target for pharmaceutical intervention in various malignancies. Anti-angiogenic therapy has emerged as a potential and effective therapeutic strategy for treating cancer and cardiovascular-related diseases. Metformin, a first-line oral antidiabetic agent for type 2 diabetes mellitus (T2DM), not only reduces blood glucose levels and improves insulin sensitivity and exerts cardioprotective effects but also shows benefits against cancers, cardiovascular diseases, and other diverse diseases and regulates angiogenesis. MicroRNAs (miRNAs) are endogenous noncoding RNA molecules with a length of approximately 19-25 bases that are widely involved in controlling various human biological processes. A large number of miRNAs are involved in the regulation of cardiovascular cell function and angiogenesis, of which miR-21 not only regulates vascular cell proliferation, migration and apoptosis but also plays an important role in angiogenesis. The relationship between metformin and abnormal miRNA expression has gradually been revealed in the context of numerous diseases and has received increasing attention. This paper reviews the drug-target interactions and drug repositioning events of metformin that influences vascular cells and has benefits on angiogenesis-mediated effects. Furthermore, we use miR-21 as an example to explain the specific molecular mechanism underlying metformin-mediated regulation of the miRNA signaling pathway controlling angiogenesis and vascular protective effects. These findings may provide a new therapeutic target and theoretical basis for the clinical prevention and treatment of cardiovascular diseases.
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Affiliation(s)
- Gang Wang
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, China; Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, the School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China.
| | - Fang Lin
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, China; Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, the School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China.
| | - Qin Wan
- Department of Endocrinology, Nephropathy Clinical Medical Research Center of Sichuan Province, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China.
| | - Jianbo Wu
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, China; Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, the School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China; Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, United States.
| | - Mao Luo
- Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, Sichuan, China; Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, the School of Pharmacy, Southwest Medical University, Luzhou, Sichuan, China.
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Chen D, Qu X, Shao J, Wang W, Dong X. Anti-vascular nano agents: a promising approach for cancer treatment. J Mater Chem B 2020; 8:2990-3004. [PMID: 32211649 DOI: 10.1039/c9tb02957e] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Anti-vascular agents (AVAs) are a class of promising therapeutic agents with tumor vasculature targeting properties, which can be divided into two types: anti-angiogenic agents (AAAs, inhibit angiogenesis factors) and vascular disrupting agents (VDAs, disrupt established tumor vasculature). AVAs exhibit an enhanced anti-cancer effect by cutting off the oxygen and nutrition supplement channels of tumors. However, the intrinsic drawbacks, such as poor hydrophilicity, undesirable membrane permeability and inferior tumor targeting ability, discount their anti-vascular efficacy. Fortunately, the development of nanotechnology has brought an opportunity for efficient delivery of AVAs to tumour sites with great therapeutic efficacy. The works summarized in this review will provide an understanding of recent advances of anti-vascular nano agents (AVNAs) with a goal to define the mechanism of anti-vascular-based cancer therapy and discuss the challenges and opportunities of AVNAs for clinical translation.
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Affiliation(s)
- Dapeng Chen
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing 211800, China.
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Dextran-Catechin inhibits angiogenesis by disrupting copper homeostasis in endothelial cells. Sci Rep 2017; 7:7638. [PMID: 28794411 PMCID: PMC5550437 DOI: 10.1038/s41598-017-07452-w] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 07/06/2017] [Indexed: 12/17/2022] Open
Abstract
Formation of blood vessels, or angiogenesis, is crucial to cancer progression. Thus, inhibiting angiogenesis can limit the growth and spread of tumors. The natural polyphenol catechin has moderate anti-tumor activity and interacts with copper, which is essential for angiogenesis. Catechin is easily metabolized in the body and this limits its clinical application. We have recently shown that conjugation of catechin with dextran (Dextran-Catechin) improves its serum stability, and exhibits potent anti-tumor activity against neuroblastoma by targeting copper homeostasis. Herein, we investigated the antiangiogenic activity of Dextran-Catechin and its mechanism. We found that Dextran-Catechin displayed potent antiangiogenic activity in vitro and in vivo. We demonstrated Dextran-Catechin generates reactive oxygen species which in turns disrupts copper homeostasis by depleting the copper importer CTR-1 and copper trafficking ATOX-1 protein. Mechanistically, we showed that disrupting copper homeostasis by knockdown of either CTR-1 or ATOX-1 protein can inhibit angiogenesis in endothelial cells. This data strongly suggests the Dextran-Catechin potent antiangiogenic activity is mediated by disrupting copper homeostasis. Thus, compounds such as Dextran-Catechin that affects both tumor growth and angiogenesis could lead the way for development of new drugs against high copper levels tumors.
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Liu G, Kuang S, Wu S, Jin W, Sun C. A novel polysaccharide from Sargassum integerrimum induces apoptosis in A549 cells and prevents angiogensis in vitro and in vivo. Sci Rep 2016; 6:26722. [PMID: 27216943 PMCID: PMC4877640 DOI: 10.1038/srep26722] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 05/09/2016] [Indexed: 12/13/2022] Open
Abstract
Many polysaccharides isolated from plants have exhibited promising antitumor activities. The aim of this study is to investigate the antitumor activity of the novel polysaccharide named SPS from Sargassum integerrimum, elucidate the underlying anticancer mechanism in a human lung cancer cell line A549, and evaluate its anti-angiogenic activity both in vitro and in vivo. The results show that SPS significantly reduces A549 cells viability in a dose- and time-dependent manner via MTT method. Flow cytometry analysis indicates that SPS could induce cell apoptosis, the loss of mitochondrial membrane potential (MMP), generation of reactive oxygen species (ROS) and G2/M phase cell cycle arrest of A549 cells. Up-regulation of the expressions of P53 and Bax, down-regulation of the expression of Bcl-2, and activation of cleaved caspase-3, caspase-9 and PARP are also detected by western blotting after the treatment of SPS. In addition, SPS inhibits the proliferation, migration and cord formation of human umbilical vein endothelial cells (HUVECs) in vitro, and prevents the vascular development of zebrafish embryos in vivo. Altogether, our data prove the anticancer and anti-angiogenesis properties of SPS, and provide further insights into the potential pharmacological application of SPS as antitumor and anti-angiogenic agent against lung cancer.
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Affiliation(s)
- Ge Liu
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
- College of Earth Science, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shan Kuang
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
| | - Shimei Wu
- Key Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China
| | - Weihua Jin
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
| | - Chaomin Sun
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
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7
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Koo HJ, Lee M, Kim J, Woo CW, Jeong SY, Choi EK, Kim N, Lee JS. Synergistic Effect of Anti-Angiogenic and Radiation Therapy: Quantitative Evaluation with Dynamic Contrast Enhanced MR Imaging. PLoS One 2016; 11:e0148784. [PMID: 26862906 PMCID: PMC4749295 DOI: 10.1371/journal.pone.0148784] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 01/22/2016] [Indexed: 12/04/2022] Open
Abstract
Purpose We assessed the effects of anti-angiogenic therapy (AAT) on radiation therapy (RT), evaluating the tumor growth and perfusion patterns on dynamic contrast enhanced MR (DCE-MR) images. Methods Thirteen nude mice with heterotopic xenograft cancer of human lung cancer cell line were used. To observe the interval change of the tumor size and demonstrate the time-signal intensity enhancement curve of the tumor, the mice were subdivided into four groups: control (n = 2), AAT (n = 2), RT (n = 5), and combined therapy (AART, n = 4). DCE-MR images were taken four weeks after treatment. Perfusion parameters were obtained based on the Brix model. To compare the interval size changes in the RT group with those in the AART group, repeated measures ANOVA was used. Perfusion parameters in both the RT and AART groups were compared using a Mann-Whitney U test. Results Tumor growth was more suppressed in AART group than in the other groups. Control group showed the rapid wash-in and wash-out pattern on DCE-MR images. In contrast to RT group with delayed and prolonged enhancement, both AAT and AART groups showed the rapid wash-in and plateau pattern. The signal intensity in the plateau/time to peak enhancement (P<0.016) and the maximum enhancement ratio (P<0.016) of AART group were higher than those of RT group. Conclusions AART showed synergistic effects in anticancer treatment. The pattern of the time-intensity curve on the DCE-MR images in each group implies that AAT might help maintain the perfusion in the cancer of AART group.
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Affiliation(s)
- Hyun Jung Koo
- Research Institute of Radiology and Department of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - Myoungsun Lee
- Research Institute of Radiology and Department of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
- Asan Institute for Life Sciences, Asan Medical Center, Seoul, Republic of Korea
| | - Jin Kim
- Research Institute of Radiology and Department of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
- Asan Institute for Life Sciences, Asan Medical Center, Seoul, Republic of Korea
| | - Chul Woong Woo
- Asan Institute for Life Sciences, Asan Medical Center, Seoul, Republic of Korea
| | - Seong-Yun Jeong
- Asan Institute for Life Sciences, Asan Medical Center, Seoul, Republic of Korea
| | - Eun Kyung Choi
- Department of Radiation Oncology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - Namkug Kim
- Research Institute of Radiology and Department of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
| | - Jin Seong Lee
- Research Institute of Radiology and Department of Radiology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, Republic of Korea
- * E-mail:
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Qi X, Liu G, Qiu L, Lin X, Liu M. Marine bromophenol bis(2,3-dibromo-4,5-dihydroxybenzyl) ether, represses angiogenesis in HUVEC cells and in zebrafish embryos via inhibiting the VEGF signal systems. Biomed Pharmacother 2015; 75:58-66. [PMID: 26463632 DOI: 10.1016/j.biopha.2015.08.033] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 08/23/2015] [Indexed: 02/02/2023] Open
Abstract
Bis(2,3-dibromo-4,5-dihydroxybenzyl) ether (BDDE) is a bromophenol compound derived from marine algae. Our previous reports have shown that BDDE possessed anticancer activity in vitro. However, its antiangiogenesis activity and possible mechanisms remain unclear. The present study demonstrated that BDDE displayed in vitro antiangiogenesis capabilities by significantly inhibiting HUVEC cells proliferation, migration, and tube formation, without any effect on the preformed vascular tube. Western blot analysis revealed that BDDE decreased the protein level of VEGF and VEGFR but not that of EGFR, FGFR, and IGFR. In addition, BDDE inactivated the VEGF downstream signaling molecules including mTOR and Src, whereas activated Akt and ERK. Moreover, BDDE blocked subintestinal vessel formation in zebrafish embryos in vivo and showed toxicity under high concentrations of BDDE. The results of this present study indicated that BDDE, which has unique chemical structure different from current antiangiogenesis agents, could be used as a potential drug candidate for cancer prevention and therapy.
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Affiliation(s)
- Xin Qi
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Ge Liu
- Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Lin Qiu
- Institute for Nutritional Sciences, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Xiukun Lin
- Department of Pharmacology, Capital Medical University, Beijing 100069, China
| | - Ming Liu
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
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Tan EH, Tan DSW, Li WY, Haaland B, Ang MK, Chau NM, Toh CK, Tan IBH, Koh TS, Thng CH, Chowbay B, Hui KM, Lim WT, Ng QS. Metronomic vinorelbine (oral) in combination with sorafenib in advanced non-small cell lung cancer. Lung Cancer 2015; 88:289-96. [DOI: 10.1016/j.lungcan.2015.04.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Revised: 03/31/2015] [Accepted: 04/01/2015] [Indexed: 11/16/2022]
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Ghavamipour F, Shahangian SS, Sajedi RH, Arab SS, Mansouri K, Aghamaali MR. Development of a highly-potent anti-angiogenic VEGF8-109 heterodimer by directed blocking of its VEGFR-2 binding site. FEBS J 2014; 281:4479-94. [PMID: 25132001 DOI: 10.1111/febs.12956] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 07/23/2014] [Accepted: 07/30/2014] [Indexed: 01/22/2023]
Abstract
Angiogenesis is a hallmark of various pathological conditions and is controlled by a variety of angiogenic factors. Blockade of vascular endothelial growth factor (VEGF) as the most pivotal stimulator of angiogenesis offers a promising therapeutic approach for some diseases, typically cancer. In the present study, a heterodimeric antagonistic VEGF was precisely designed based on structural information of recently-crystallized VEGF/VEGF receptor-2 (VEGFR-2/fetal liver kinase 1/kinase domain region) complex. Directed blocking of kinase domain region occurs via substitution of a VEGF receptor binding site by two peptide segments in one pole, whereas the binding domain of the other pole of VEGF was intact. Candidate peptides for substitution were selected considering to some sequence and structural criteria. A reliable model of modified VEGF was built, refined using molecular dynamics simulation and docked with VEGFR-2. Docking analysis revealed that binding affinity of mutant VEGF was notably diminished, corroborating our design. Heterodimeric VEGF was expressed, refolded and highly purified by two-step affinity chromatography. Dimerization of this antagonist was confirmed using some analytical techniques. Spectroscopic studies assured us to obtain the heterodimeric form of VEGF. Some angiogenic in vitro assays such endothelial cell proliferation and tube formation indicated that this antagonist is not only strongly capable of inhibiting angiogenesis (half maximal inhibitory concentration of 33 and 24 ng · mL(-1) , respectively), but also showed the highest inhibitory effect compared to all other heterodimeric VEGF variants. The high anti-angiogenic potency of this VEGF antagonist may allow its future use as an anti-tumor agent.
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Affiliation(s)
- Fahimeh Ghavamipour
- Department of Biology, Faculty of Sciences, University of Guilan, Rasht, Iran
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Liu G, Liu M, Wei J, Huang H, Zhang Y, Zhao J, Xiao L, Wu N, Zheng L, Lin X. CS5931, a novel polypeptide in Ciona savignyi, represses angiogenesis via inhibiting vascular endothelial growth factor (VEGF) and matrix metalloproteinases (MMPs). Mar Drugs 2014; 12:1530-44. [PMID: 24633253 PMCID: PMC3967225 DOI: 10.3390/md12031530] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 01/09/2014] [Accepted: 01/22/2014] [Indexed: 12/13/2022] Open
Abstract
CS5931 is a novel polypeptide from Cionasavignyi with anticancer activities. Previous study in our laboratory has shown that CS5931 can induce cell death via mitochondrial apoptotic pathway. In the present study, we found that the polypeptide could inhibit angiogenesis both in vitro and in vivo. CS5931 inhibited the proliferation, migration and formation of capillary-like structures of HUVECs (Human Umbilical Vein Endothelial Cell) in a dose-dependent manner. Additionally, CS5931 repressed spontaneous angiogenesis of the zebrafish vessels. Further studies showed that CS5931 also blocked vascular endothelial growth factor (VEGF) production but without any effect on its mRNA expression. Moreover, CS5931 reduced the expression of matrix metalloproteinases (MMP-2 and MMP-9) both on protein and mRNA levels in HUVEC cells. We demonstrated that CS5931 possessed strong anti-angiogenic activity both in vitro and in vivo, possible via VEGF and MMPs. This study indicates that CS5931 has the potential to be developed as a novel therapeutic agent as an inhibitor of angiogenesis for the treatment of cancer.
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Affiliation(s)
- Ge Liu
- Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China.
| | - Ming Liu
- Key Laboratory of Marine Drugs, Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China.
| | - Jianteng Wei
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
| | - Haijuan Huang
- Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Yuyan Zhang
- Qingdao University of Science and Technology, Qingdao 266042, China.
| | - Jin Zhao
- Department of Biotechnology, Zhengzhou University, Zhengzhou 450001, China.
| | - Lin Xiao
- Qingdao Agricultural University, Qingdao 266109, China.
| | - Ning Wu
- Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China.
| | - Lanhong Zheng
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao 266109, China.
| | - Xiukun Lin
- Department of Pharmacology, Capital Medical University, Beijing 100069, China.
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Newton HB. Molecular neuro-oncology and development of targeted therapeutic strategies for brain tumors. Part 2: PI3K/Akt/PTEN, mTOR, SHH/PTCH and angiogenesis. Expert Rev Anticancer Ther 2014; 4:105-28. [PMID: 14748662 DOI: 10.1586/14737140.4.1.105] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Brain tumors are a diverse group of malignancies that remain refractory to conventional treatment approaches. Molecular neuro-oncology has now begun to clarify the transformed phenotype of brain tumors and identify oncogenic pathways that might be amenable to targeted therapy. Activity of the phosphoinositide 3; kinase (PI3K)/Akt pathway is often upregulated in brain tumors due to excessive stimulation by growth factor receptors and Ras. Loss of function of the tumor suppressor gene PTEN also frequently contributes to upregulation of PI3K/Akt. Several compounds, such as wortmannin and LY-294002, can target PI3K and inhibit activity of this pathway. The mammalian target of rapamycin (mTOR) is an important regulator of cell growth and metabolism and is often upregulated by Akt. Clinical trials of CCI-779, an inhibitor of mTOR, are ongoing in recurrent malignant glioma patients. The sonic hedgehog/PTCH pathway is involved in the tumorigenesis of some familial and sporadic medulloblastomas. This pathway can be targeted by cyclopamine, which is under evaluation in preclinical studies. Angiogenesis is a critical process for development and progression of brain tumors. Targeted approaches to inhibit angiogenesis include monoclonal antibodies, receptor tyrosine kinase inhibitors, antisense oligonucleotides and gene therapy. Clinical trials are ongoing for numerous angiogenesis inhibitors, including thalidomide, CC-5103 and PTK 787/ZK 222584. Further development of targeted therapies and evaluation of these new agents in clinical trials will be needed to improve survival and quality of life of patients with brain tumors.
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Affiliation(s)
- Herbert B Newton
- Dardinger Neuro-Oncology Center, Department of Neurology, Ohio State University Hospitals, 465 Means Hall, 1654 Upham Drive, Columbus, OH 43210, USA.
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Kramer GM, Yaqub M, Bahce I, Smit EF, Lubberink M, Hoekstra OS, Boellaard R. CT-perfusion versus [(15)O]H2O PET in lung tumors: effects of CT-perfusion methodology. Med Phys 2013; 40:052502. [PMID: 23635292 DOI: 10.1118/1.4798560] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE Nowadays, PET and dynamic contrast enhanced CT or MRI are used to assess tumor blood perfusion. Although [(15)O]H2O PET is the gold standard, it is hardly available for routine clinical practice, due to the short half-life of (15)O. However, the lack of uniformity in scanning and analytic methods limits the use of CT perfusion (CTP) in clinical trials and practice. This study compares [(15)O]H2O PET with CT based perfusion in lung tumors and assesses the effects of various CTP postprocessing and analytical methods on the CTP results using [(15)O]H2O PET as the reference technique. METHODS Various CTP analysis and image postprocessing methods were assessed. Furthermore, parametric images were obtained using the Slope method. Volumes of interests were defined using several different segmentation methods including Hounsfield unit based contouring thresholds, both with and without framewise application of dynamic contouring thresholds to exclude lung tissue or intravascular contrast. A head-to-head comparison of tumor perfusion obtained by CTP and [(15)O]H2O PET was performed using linear regressions, Bland-Altman plots, and an intraclass correlation coefficient (ICC). In addition, the different postprocessing methods were compared reciprocally. RESULTS In six lung cancer patients, perfusion assessed using CTP studies combined with the Slope method correlated best with [(15)O]H2O PET (ICC = 0.88; R(2) = 0.89; Y = 0.80). The Mullani-Gould method showed best correlation with the Slope method (ICC ≥ 0.71; R(2) ≥ 0.80; Y = 0.71-1.35). These correlations were obtained using dynamic contouring thresholds and show the influence of CTP postprocessing methods. CONCLUSIONS Tumor perfusion assessed by CTP in combination with dynamic contouring thresholds using the Slope method correlates well with [(15)O]H2O PET. This suggests that CTP can be used as a method to evaluate tumor perfusion in lung cancer.
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Affiliation(s)
- G M Kramer
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam 1081 HZ, The Netherlands
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14
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Zhang L, Jing H, Cui L, Li H, Zhou B, Zhou G, Dai F. 3,4-dimethoxystilbene, a resveratrol derivative with anti-angiogenic effect, induces both macroautophagy and apoptosis in endothelial cells. J Cell Biochem 2013; 114:697-707. [DOI: 10.1002/jcb.24411] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2012] [Accepted: 09/24/2012] [Indexed: 12/28/2022]
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15
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Molecular cloning, expression and purification of recombinant soluble mouse endostatin as an anti-angiogenic protein in Escherichia coli. Mol Biol Rep 2012; 40:1027-33. [PMID: 23070914 DOI: 10.1007/s11033-012-2144-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Accepted: 10/03/2012] [Indexed: 12/29/2022]
Abstract
Inhibition of angiogenesis has become a particular interest for treatment of solid tumors. Endostatin, a C-terminal fragment of collagen XVIII, has been reported to exhibit potent inhibitory effect on endothelial cells proliferation, migration and tube formation. In this research, the cDNA library of endostatin was synthesized from mouse liver and inserted into the SacI and SalI enzyme-cutting sites of pUC18 cloning vector. The recombinant vector was transferred into Escherichia coli DH5a and the recombinant clone was selected on LB agar plate plus ampicillin. PCR analysis and DNA sequencing proved the presence of intact endostatin gene in pUC18. The endostatin gene subcloned into pET32a expression vector and the competent bacterial cells of E. coli BL21 were transformed by the vector harboring endostatin gene. In the optimum conditions, expression plasmid was induced with IPTG and recombinant soluble endostatin as a fusion with thioredoxin was purified with Ni-NTA (Ni(2+)-nitrilotriacetate) resin. The results showed that soluble recombinant endostatin as a fusion protein with thioredoxin is a homogenous polypeptide that inhibits angiogenesis (capillary tube formation) in human umbilical vein endothelial cells by 200 ng/ml.
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Haddad JJ. The immunopharmacologic potential of Semaxanib and new generation directed therapeutic drugs: Receptor tyrosine kinase regulation with anti-tumorigenensis/angiogenesis properties. Saudi Pharm J 2012; 20:103-23. [PMID: 23960782 PMCID: PMC3744945 DOI: 10.1016/j.jsps.2011.09.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Accepted: 09/01/2011] [Indexed: 01/07/2023] Open
Abstract
Molecular signaling of messages emanating from cellular membranes through receptor tyrosine kinases (RTKs) is a major mechanism for intercellular communication and transduction during development and metabolism, as well as in disease-associated processes. The phosphorylation status and signaling activity of RTKs are determined by a dynamic equilibrium of the activity of both RTKs and protein tyrosine phosphatases (PTPs). RTKs are essentially a class of cell-surface receptors for growth factors and other extracellular ligands, the most conspicuous perhaps are members of the vascular endothelial growth factor (VEGF) gene family, which plays a fundamental role in the growth and differentiation of vascular, as well as lymphatic endothelial cells. In particular, VEGF is a major regulator of normal (physiologic) and abnormal (cancerous) angiogenesis, including that associated with tumors and cancer. Blockers/inhibitors and regulators of RTKs are indeed promising cancer interventions, their specific mechanisms are yet to be unraveled. In this cutting-edge synopsis, I elaborate on breakthroughs/advances and current concepts of RTK regulation, further shedding light on exploring the role of potential regulators, particularly the RTK inhibitor Semaxanib, and the mechanisms associated with tumorigenesis in an effort to understand a potentially alleviating pharmacologic therapeutic intervention. This survey also tackles the loopholes and shortcomings of the aforementioned inhibitory role of Semaxanib, especially its inefficacy and ultimate discontinuation of relevant clinical trials.
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The sphingosine-1-phosphate derivative NHOBTD inhibits angiogenesis both in vitro and in vivo. Biochem Biophys Res Commun 2011; 413:189-93. [PMID: 21888894 DOI: 10.1016/j.bbrc.2011.08.055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Accepted: 08/11/2011] [Indexed: 11/22/2022]
Abstract
Sphingosine-1-phosphate (S1P) plays an important role in angiogenesis by stimulating DNA synthesis, chemotactic motility, and early blood vessel formation. Accordingly, the S1P signaling pathway is an attractive target for novel anti-angiogenic therapeutics. Here, we describe a small synthetic derivative of S1P that acts as an anti-angiogenic agent. We found that the S1P derivative NHOBTD [N-((2S,3R)-3-hydroxy-1-morpholino-4-(3-octylphenyl)butan-2-yl)tetradecanamide] suppressed S1P-induced invasion and tube formation by human umbilical vein endothelial cells. NHOBTD also suppressed S1P signaling, as seen by destabilization of hypoxia inducible factor-1 alpha (HIF-1α) and secretion of VEGF, a transcriptional target of HIF-1α. Moreover, NHOBTD profoundly blocked endogenous neovascularization of the chick embryo chorioallantoic membrane, without rupturing any existing vessels. Together, these results demonstrate that NHOBTD is a new anti-angiogenic molecule that is capable of perturbing S1P signaling, and provides the basis for developing new anti-angiogenic drugs.
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Anti-angiogenic/proliferative behavior of a “4-aryl-4H-chromene” on blood vessel’s endothelial cells: A possible evidence on dual “anti-tumor” activity. Med Chem Res 2010. [DOI: 10.1007/s00044-010-9418-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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19
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Current Research of the RAS in Pancreatitis and Pancreatic Cancer. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2010; 690:179-99. [DOI: 10.1007/978-90-481-9060-7_10] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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20
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Eikesdal HP, Kalluri R. Drug resistance associated with antiangiogenesis therapy. Semin Cancer Biol 2009; 19:310-7. [PMID: 19524042 DOI: 10.1016/j.semcancer.2009.05.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2008] [Accepted: 05/20/2009] [Indexed: 12/31/2022]
Abstract
Neovascularization is one of the hallmarks associated with tumor growth. In the recent years, a number of angiogenesis inhibitors have been approved for clinical use in cancer patients. However, the efficacy of antiangiogenic therapy is in most cases short-lasting, with likely drug resistance developing within a few months. It is becoming clear also that there are a subset of malignant tumors that are inherently resistant to angiogenesis inhibition. The knowledge regarding resistance mechanisms towards angiogenesis inhibitors is still evolving and here we propose some theories and in some cases provide experimental evidence.
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Affiliation(s)
- Hans Petter Eikesdal
- Division of Matrix Biology, Department of Medicine, Beth Israel Deaconess Medical Center & Harvard Medical School, Boston, MA 02115, USA
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21
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Mauriz JL, González-Gallego J. Antiangiogenic drugs: current knowledge and new approaches to cancer therapy. J Pharm Sci 2009; 97:4129-54. [PMID: 18200520 DOI: 10.1002/jps.21286] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Angiogenesis--process of new blood-vessel growth from existing vasculature--is an integral part of both normal developmental processes and numerous pathologies such as cancer, ischemic diseases and chronic inflammation. Angiogenesis plays a crucial role facilitating tumour growth and the metastatic process, and it is the result of a dynamic balance between proangiogenic and antiangiogenic factors. The potential to block tumour growth and metastases by angiogenesis inhibition represents an intriguing approach to the cancer treatment. Angiogenesis continues to be a topic of major scientific interest; and there are currently more antiangiogenic drugs in cancer clinical trials than those that fit into any other mechanistic category. Based on preclinical studies, researchers believe that targeting the blood vessels which support tumour growth could help treatment of a broad range of cancers. Angiogenic factors or their receptors, endothelial cell proliferation, matrix metalloproteinases or endothelial cell adhesion, are the main targets of an increasing number of clinical trials approved to test the tolerance and therapeutic efficacy of antiangiogenic agents. Unfortunately, contrary to initial expectations, it has been described that antiangiogenic treatment can cause different toxicities in cancer patients. The purpose of this article is to provide an overview of current attempts to inhibit tumour angiogenesis for cancer therapy.
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Affiliation(s)
- Jose L Mauriz
- Ciberehd and Institute of Biomedicine, University of León, Campus of Vegazana, s/n, 24071 León, Spain
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22
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A phase II study of Tg4010 (Mva-Muc1-Il2) in association with chemotherapy in patients with stage III/IV Non-small cell lung cancer. J Thorac Oncol 2008; 3:735-44. [PMID: 18594319 DOI: 10.1097/jto.0b013e31817c6b4f] [Citation(s) in RCA: 150] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND TG4010 is a recombinant viral vector expressing both the tumor-associated antigen MUC1 and Interleukine-2. This vector is based on the modified virus of Ankara, a significantly attenuated strain of vaccinia virus. TG4010 has been designed to induce or amplify a cellular immune response directed against tumor cells expressing MUC1. METHODS A multicenter, randomized phase II study has explored two schedules of the combination of TG4010 with first line chemotherapy in patients with stage IIIB/IV non-small cell lung cancer. In Arm 1, TG4010 was combined upfront with cisplatin (100 mg/m day 1) and vinorelbine (25 mg/m day 1 and day 8). In Arm 2, patients were treated with TG4010 monotherapy until disease progression, followed by TG4010 plus the same chemotherapy as in Arm1. Response rate was evaluated according to RECIST. Median time to progression and median overall survival were calculated according to the Kaplan-Meier method. RESULTS Sixty-five patients were enrolled, 44 in Arm 1 and 21 in Arm 2, in accordance with the two stage Simon design of the statistical plan. In Arm 1, partial response was observed in 13 patients out of 37 evaluable patients (29.5% of the intent to treat population, 35.1% of the evaluable patients). In Arm 2, two patients experienced stable disease for more than 6 months with TG4010 alone (up to 211 days), in the subsequent combination with chemotherapy, one complete and one partial response were observed out of 14 evaluable patients. Arm 2 did not meet the criteria for moving forward to second stage. The median time to progression was 4.8 months for Arm 1. The median overall survival was 12.7 months for Arm 1 and 14.9 for Arm 2. One year survival rate was 53% for Arm 1 and 60% for Arm 2. TG4010 was well tolerated, mild to moderate injection site reactions, flu-like symptoms, and fatigue being the most frequent adverse reactions. A MUC1-specific cellular immune response was observed in lymphocyte samples from all responding patients evaluable for immunology. CONCLUSIONS The combination of TG4010 with standard chemotherapy in advanced non-small cell lung cancer is feasible and shows encouraging results. A randomized study evaluating the addition of TG4010 to first line chemotherapy in this population is in progress.
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Cui R, Ohashi R, Takahashi F, Yoshioka M, Tominaga S, Sasaki S, Gu T, Takagi Y, Takahashi K. Signal transduction mediated by endostatin directly modulates cellular function of lung cancer cells in vitro. Cancer Sci 2007; 98:830-7. [PMID: 17419709 PMCID: PMC11159944 DOI: 10.1111/j.1349-7006.2007.00459.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Endostatin (ED) is a carboxyl-terminal fragment of collagen XVIII with strong antiangiogenic activity. ED has been considered as a highly specific inhibitor of endothelial cell proliferation and migration through interaction with its receptor on the surface of endothelial cells. Recently, direct antitumor effects of ED in colon cancer cells and head and neck squamous cell carcinoma cells has been reported. However, its effect on lung cancer cells has not been clarified. The purpose of the present study was to determine the effect of ED on in vitro lung cancer cell function and to identify its receptor on lung cancer cells. We revealed that alpha5 integrin is capable of being a functional ED receptor among several integrins that are expressed on murine lung cancer (Lewis lung cancer [LLC]) cells. We further demonstrated that the ED-integrin interaction modulates various in vitro biological functions of LLC cells as we revealed that immobilized ED helps in LLC cell adhesion and migration in an integrin-dependent manner. Furthermore, ED inhibited LLC cell proliferation and induced apoptosis. Interestingly, ED did not demonstrate any antiproliferative activity against the other murine lung cancer cell line, KLN205, that lacks alpha5 integrin but binds to immobilized ED through the beta1 integrin. In addition, the binding of ED to alpha5 integrin on LLC cells induced phosphorylation of focal adhesion kinase. Taken together, these results suggest that the interaction between ED and alpha5 integrin may play an important role in lung cancer cell function.
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Affiliation(s)
- Ri Cui
- Department of Respiratory Medicine and Research Institute for Diseases of Old Age, Juntendo University, School of Medicine, Tokyo, Japan.
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Jung HJ, Shim JS, Lee HB, Kim CJ, Kuwano T, Ono M, Kwon HJ. Embellistatin, a microtubule polymerization inhibitor, inhibits angiogenesis both in vitro and in vivo. Biochem Biophys Res Commun 2006; 353:376-80. [PMID: 17184734 DOI: 10.1016/j.bbrc.2006.12.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2006] [Accepted: 12/05/2006] [Indexed: 11/22/2022]
Abstract
The efficient inhibition of angiogenesis is considered as a promising strategy for the treatment of angiogenesis-related diseases including cancer. Herein, we report that embellistatin, a bicyclic ketone compound known as a microtubule polymerization inhibitor, exhibits anti-angiogenic activity. Embellistatin inhibited in vitro angiogenesis of bovine aortic endothelial cells (BAECs) such as bFGF-induced invasion and tube formation as well as bFGF-induced mouse corneal angiogenesis in vivo. Notably, embellistatin exhibited stronger inhibition activity for the growth of BAECs than that of normal and cancer cell lines. Cell cycle analysis revealed that the compound arrests cell cycle at G2/M phase, which is associated with the increased expression of p21(WAF1) and p53 partly. These results demonstrate that embellistatin may serve the basis for the development of new anti-angiogenic agents.
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Affiliation(s)
- Hye Jin Jung
- Chemical Genomics Laboratory, Department of Biotechnology, College of Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Republic of Korea
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Quesada AR, Muñoz-Chápuli R, Medina MA. Anti-angiogenic drugs: from bench to clinical trials. Med Res Rev 2006; 26:483-530. [PMID: 16652370 DOI: 10.1002/med.20059] [Citation(s) in RCA: 118] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Angiogenesis, the generation of new capillaries through a process of pre-existing microvessel sprouting, is under stringent control and normally occurs only during embryonic and post-embryonic development, reproductive cycle, and wound repair. However, in many pathological conditions (solid tumor progression, metastasis, diabetic retinopathy, hemangioma, arthritis, psoriasis and atherosclerosis among others), the disease appears to be associated with persistent upregulated angiogenesis. The development of specific anti-angiogenic agents arises as an attractive therapeutic approach for the treatment of cancer and other angiogenesis-dependent diseases. The formation of new blood vessels is a complex multi-step process. Endothelial cells resting in the parent vessels are activated by an angiogenic signal and stimulated to synthesize and release degradative enzymes allowing endothelial cells to migrate, proliferate and finally differentiate to give rise to capillary tubules. Any of these steps may be a potential target for pharmacological intervention. In spite of the disappointing results obtained initially in clinical trials with anti-angiogenic drugs, recent reports with positive results in phases II and III trials encourage expectations in their therapeutic potential. This review discusses the current approaches for the discovery of new compounds that inhibit angiogenesis, with emphasis on the clinical developmental status of anti-angiogenic drugs.
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Affiliation(s)
- Ana R Quesada
- Department of Molecular Biology and Biochemistry, Faculty of Science, University of Málaga, 29071 Málaga, Spain.
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26
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Becknell NC, Zulli AL, Angeles TS, Yang S, Albom MS, Aimone LD, Robinson C, Chang H, Hudkins RL. Novel C-3 N-urea, amide, and carbamate dihydroindazolo[5,4-a]pyrrolo[3,4-c]carbazole analogs as potent TIE-2 and VEGF-R2 dual inhibitors. Bioorg Med Chem Lett 2006; 16:5368-72. [PMID: 16890434 DOI: 10.1016/j.bmcl.2006.07.066] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2006] [Revised: 07/18/2006] [Accepted: 07/21/2006] [Indexed: 10/24/2022]
Abstract
A novel series of C-3 urea, amide, and carbamate fused dihydroindazolocarbazole (DHI) analogs are reported as highly potent dual inhibitors of TIE-2 and VEGF-R2 receptor tyrosine kinases with excellent cellular potency. Structure-activity relationship (SAR) studies indicate the optimal N-13 alkyl substitutions are n-propyl and i-butyl. The isopropyl carbamate 39 displayed good dual enzyme, cell potency, and rat pharmacokinetic properties for advancement to in vivo evaluation.
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Affiliation(s)
- Nadine C Becknell
- Cephalon, Inc., 145 Brandywine Parkway, West Chester, PA 19380, USA.
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27
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Li C, Porco JA. Synthesis of Epoxyquinol A and Related Molecules: Probing Chemical Reactivity of Epoxyquinol Dimers and 2H-Pyran Precursors. J Org Chem 2005; 70:6053-65. [PMID: 16018703 DOI: 10.1021/jo050897o] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Total syntheses of the epoxyquinoid dimers, epoxyquinols A, B, and epoxytwinol A (RKB-3564 D), have been accomplished employing [4 + 2] and [4 + 4] dimerization of 2H-pyran epoxyquinol monomers. Modifications of 2H-pyran precursors have been explored, including alteration of epoxy alcohol and diene stereochemistry. A stable 2H-pyran prepared by alteration of the epoxyquinol 2H-pyran nucleus was evaluated as a diene in Diels-Alder cycloaddition with reactive dienophiles. Extensive studies for improving the [4 + 4] dimerization of selectively protected 2H-pyran monomers to afford the novel epoxyquinoid dimer epoxytwinol A were carried out, and valuable insight regarding competitive [4 + 2] and [4 + 4] dimerization processes has been obtained. In addition, chemical reactivities and structural modifications of epoxyquinol dimers have been evaluated, including [2 + 2] photocycloaddition and [3,3] sigmatropic rearrangement, indicating the possibility for production of novel structural diversity from dimeric epoxyquinoid natural product frameworks.
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Affiliation(s)
- Chaomin Li
- Department of Chemistry and Center for Chemical Methodology and Library Development, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA
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Gasparini G, Longo R, Fanelli M, Teicher BA. Combination of antiangiogenic therapy with other anticancer therapies: results, challenges, and open questions. J Clin Oncol 2005; 23:1295-311. [PMID: 15718328 DOI: 10.1200/jco.2005.10.022] [Citation(s) in RCA: 145] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Angiogenesis is necessary for tumor growth. Drug discovery efforts have identified several potential therapeutic targets on endothelial cells and selective inhibitors capable of slowing tumor growth or producing tumor regression by blocking angiogenesis in in vivo tumor models. Certain antiangiogenic therapeutics increase the activity of cytotoxic anticancer treatments in preclinical models. More than 75 antiangiogenic compounds have entered clinical trials. Most of the early clinical testing was conducted in patients with advanced disease resistant to standard therapies. Several phase III trials have been undertaken to compare the efficacy of standard chemotherapy versus the same in combination with an experimental angiogenesis inhibitor. Preliminary results of the clinical studies suggest that single-agent antiangiogenic therapy is poorly active in advanced tumors. Although some of the results of combination trials are controversial, recent positive outcomes with an antivascular endothelial growth factor antibody combined with chemotherapy as front-line therapy of metastatic colorectal cancer have renewed enthusiasm for this therapeutic strategy. This article presents an overview of experimental and clinical studies of combined therapy with antiangiogenic agents and highlights the challenges related to the appropriate strategies for selection of the patients, study design, and choice of proper end points for preclinical and clinical studies using these agents.
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Kim EJ, Shin WH. General Pharmacology of CKD-732, a New Anticancer Agent: Effects on Central Nervous, Cardiovascular, and Respiratory System. Biol Pharm Bull 2005; 28:217-23. [PMID: 15684472 DOI: 10.1248/bpb.28.217] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
CKD-732 [6-O-(4-dimethylaminoethoxy) cinnamoyl fumagillol hemioxalate] is a new fumagillin anticancer drug that belongs to an angiogenesis inhibitor. Its effect on the central nervous system (CNS), general behavior, cardiovascular-respiratory system and the other organ systems were studied. CKD-732 was intravenously administered with the dosages of 10, 30, 40 or 50 mg/kg and the highest dosage of 50 mg/kg prolonged the hexobarbital-induced sleep time. CKD-732 at the dosage of 50 mg/kg, also, caused the decrease of body temperature from 15 to 120 min after the administration, which was recovered at 240 min. In the study of the effects on gastric secretion, CKD-732 induced the increase of pH and decrease of total acidity. However, CKD-732 showed no effect on general behavior, spontaneous locomotor activity, motor coordination, analgesia, convulsion, mean arterial pressure, and cardiac functions except for heart rate of isolated rat heart, respiration, isolated smooth muscle, intestinal charcoal transport and renal function. Based on the results, we suggested that CKD-732 is safe general pharmacologically at clinical supposed dose (1.75 mg/kg) and demonstrated to have much better safety than other fumagillin derivatives.
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Affiliation(s)
- Eun-Joo Kim
- Department of Pharmacology and National Research Laboratory, Korea Institute of Toxicology, Korea Research Institute of Chemical Technology, Yuseong, Daejeon, 305-343 Korea
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Deplanque G, Madhusudan S, Jones PH, Wellmann S, Christodoulos K, Talbot DC, Ganesan TS, Blann A, Harris AL. Phase II trial of the antiangiogenic agent IM862 in metastatic renal cell carcinoma. Br J Cancer 2004; 91:1645-50. [PMID: 15354209 PMCID: PMC2409952 DOI: 10.1038/sj.bjc.6602126] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
IM862 is a naturally occurring dipeptide (L-glu-L-trp) with immunomodulatory and antiangiogenic properties. A significant anticancer activity has been reported recently in AIDS-related Kaposi's sarcoma, a tumour of endothelial cell origin. The high vascularity and responsiveness to immunotherapy of renal cell carcinoma (RCC) makes such a tumour a potential target for IM862. In all, 25 patients were accrued in a prospective phase II trial using a standard two-step design. The main inclusion criteria were WHO performance status ⩽2, age over 18 years, expected survival >3 months, normal marrow, kidney and liver functions. IM862 was given intranasally at a dose of 20 mg three times daily. Each cycle consisted of 8 consecutive weeks of treatment. All 25 patients were fully evaluable for response and 24 for toxicities. Median age was 62 years (range 42–76), median WHO PS was 1 (0–2). No grade 2 or 3 toxicities related to the study drug have been recorded. Eight patients had stable disease (SD) and 17 progressed while on treatment. Median survival was 7.9 months (range 2.7–20). Median time to progression was 1.9 months (range 1.2–12.6). Median duration of SD was 6 months (range 5.2–12.6+). Analysis of blood angiogenic markers showed a significant decrease of plasma vascular endothelial growth factor (VEGF) levels after 4 and 8 weeks of therapy. Treatment with IM862 has no toxicity, but does not lead to any significant objective responses in metastatic RCC. IM862 should not be further evaluated as a single agent at these doses and schedule for this population of patients. The decrease in VEGF levels warrants further investigation of IM862 as an antiangiogenic therapy.
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Affiliation(s)
- G Deplanque
- University of Oxford, Cancer Research UK Medical Oncology Unit, The Churchill, Old Road, Oxford OX3 7LJ, England
| | - S Madhusudan
- University of Oxford, Cancer Research UK Medical Oncology Unit, The Churchill, Old Road, Oxford OX3 7LJ, England
| | - P H Jones
- University of Oxford, Cancer Research UK Medical Oncology Unit, The Churchill, Old Road, Oxford OX3 7LJ, England
| | - S Wellmann
- University of Oxford, Cancer Research UK Medical Oncology Unit, The Churchill, Old Road, Oxford OX3 7LJ, England
| | - K Christodoulos
- University of Oxford, Cancer Research UK Medical Oncology Unit, The Churchill, Old Road, Oxford OX3 7LJ, England
| | - D C Talbot
- University of Oxford, Cancer Research UK Medical Oncology Unit, The Churchill, Old Road, Oxford OX3 7LJ, England
| | - T S Ganesan
- University of Oxford, Cancer Research UK Medical Oncology Unit, The Churchill, Old Road, Oxford OX3 7LJ, England
| | - A Blann
- University of Oxford, Cancer Research UK Medical Oncology Unit, The Churchill, Old Road, Oxford OX3 7LJ, England
| | - A L Harris
- University of Oxford, Cancer Research UK Medical Oncology Unit, The Churchill, Old Road, Oxford OX3 7LJ, England
- University of Oxford, Cancer Research UK Medical Oncology Unit, The Churchill, Old Road, Oxford OX3 7LJ, England. E-mail:
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31
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Jansen M, de Witt Hamer PC, Witmer AN, Troost D, van Noorden CJF. Current perspectives on antiangiogenesis strategies in the treatment of malignant gliomas. ACTA ACUST UNITED AC 2004; 45:143-63. [PMID: 15210301 DOI: 10.1016/j.brainresrev.2004.03.001] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/09/2004] [Indexed: 01/12/2023]
Abstract
Progressive tumor growth depends on angiogenesis to sustain metabolic needs of tumor cells, thus providing a potential target for cancer therapy. Malignant gliomas have retained their dismal prognosis despite aggressive multimodal conventional therapeutic approaches, illustrating the need for novel therapeutic strategies. Gliomas are a suitable tumor type for probing angiogenesis inhibition as their proliferation is characterized by a prominent proliferative vascular component. In the present review, we discuss the current status and future directions of angiogenesis inhibition in gliomas. We focus on recently developed approaches inducing an antiangiogenic response such as targeted gene delivery, protein tyrosine kinase inhibitors and encapsulated producer cells. Although several of these modalities have shown promising results on their own, the true potential of these novel approaches lies in their combined use with radiotherapy or 'metronomically scheduled' chemotherapy. A combined approach potentially counteracts the selective pressure on hypoxia-resistant malignant tumor cells, circumvents endothelial resistance induced by local cytoprotective responses and enhances the delivery of cytotoxic agents by normalizing vascular physiology. Surrogate markers of angiogenesis currently under study may provide accurate assessment of response in individual patients. Future research on endothelial markers expressed on tumor-associated vasculature as well as endothelial responses to cytotoxic treatment will provide new avenues for molecularly targeted therapy in malignant gliomas.
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Affiliation(s)
- Marnix Jansen
- Department of Pathology, Academic Medical Centre, University of Amsterdam, Amsterdam, The Netherlands
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32
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Ahn CM, Shin WS, Bum Woo H, Lee S, Lee HW. Synthesis of symmetrical bis-alkynyl or alkyl pyridine and thiophene derivatives and their antiangiogenic activities. Bioorg Med Chem Lett 2004; 14:3893-6. [PMID: 15225692 DOI: 10.1016/j.bmcl.2004.05.065] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2004] [Revised: 05/24/2004] [Accepted: 05/25/2004] [Indexed: 10/26/2022]
Abstract
Fourteen symmetrical bis-alkynyl pyridine and thiophene derivatives were synthesized and their antiangiogenic activity was evaluated with the proliferation and tube formation inhibitory activity on the human umbilical vein endothelial cells (HUVEC). Compounds 6, 8, and 10, rigid mimetic structure of curcumin, showed the potent growth inhibitory activity and the potent tube formation inhibitory activity.
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Affiliation(s)
- Chan Mug Ahn
- Department of Basic Sciences, Wonju College of Medicine, Yonsei University, Wonju 220-701, South Korea.
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33
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Tong Y, Zhang X, Zhao W, Zhang Y, Lang J, Shi Y, Tan W, Li M, Zhang Y, Tong L, Lu H, Lin L, Ding J. Anti-angiogenic effects of Shiraiachrome A, a compound isolated from a Chinese folk medicine used to treat rheumatoid arthritis. Eur J Pharmacol 2004; 494:101-9. [PMID: 15212963 DOI: 10.1016/j.ejphar.2004.04.053] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2003] [Revised: 04/24/2004] [Accepted: 04/26/2004] [Indexed: 11/26/2022]
Abstract
The Chinese folk medicine Shiraia bambusicola has long been utilized in the treatment of rheumatoid arthritis, a disease in which angiogenesis plays an important role. We report here the isolation of the compound Shiraiachrome A from S. bambusicola and the demonstration of its anti-angiogenic properties. We found that Shiraiachrome A significantly inhibited the proliferation, migration, and tube formation of human microvascular endothelial cells (HMEC) in a dose-dependent manner, with average IC(50) values of 2.1+/-0.36, 1.97+/-0.44, and 1.65+/-0.59 microM, respectively. In addition, Shiraiachrome A inhibited the formation of new microvessels in a rat aorta culture model as well as in the chick embryo chorioallantoic membrane (CAM) assay. Investigation of the mechanism of action of Shiraiachrome A demonstrated that this compound suppressed the autophosphorylation of four receptor tyrosine kinases (RTKs), with IC(50) values ranging from 2.2 to 4.3 microM. These results suggest that Shiraiachrome A inhibits angiogenesis by blocking growth factor-stimulated autophosphorylation of RTKs. These findings also indicate that Shiraiachrome A may be a potent therapeutic agent for angiogenesis-related diseases such as cancer, rheumatoid arthritis, and diabetic retinopathy.
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Affiliation(s)
- Yunguang Tong
- Division of Anti-tumor Pharmacology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Shanghai Institutes for Biological Science, Chinese Academy of Sciences, 555 Zu-chong-zhi Road, Shanghai 201203, PR China
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34
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Jung HJ, Burm Lee H, Lim CH, Kim CJ, Kwon HJ. Cochlioquinone A1, a new anti-angiogenic agent from Bipolaris zeicola. Bioorg Med Chem 2004; 11:4743-7. [PMID: 14556789 DOI: 10.1016/s0968-0896(03)00523-6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Cochlioquinone A1 (CoA1) was newly isolated from the culture extract of Bipolaris zeicola as a potent anti-angiogenic agent. CoA1 inhibited in vitro angiogenesis of bovine aortic endothelial cells (BAECs) such as bFGF-induced tube formation and invasion at the concentration (1 microg/mL) without cytotoxicity. Notably, CoA1 exhibited more potent inhibition activity for the growth of BAECs than that of normal and cancer cell lines investigated in this study. These results demonstrate that CoA1 is a new anti-angiogenic agent and can be developed as a new therapeutic agent for angiogenesis-related diseases.
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Affiliation(s)
- Hye Jin Jung
- Department of Bioscience and Biotechnology, Institute of Bioscience, Sejong University, 98 Kunja-Dong, Kwangjin-Gu, 143-747 Seoul, South Korea
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35
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Roh MS, Hong SH, Jeong JS, Kwon HC, Kim MC, Cho SH, Yoon JH, Hwang TH. Gene expression profiling of breast cancers with emphasis of beta-catenin regulation. J Korean Med Sci 2004; 19:275-82. [PMID: 15082903 PMCID: PMC2822311 DOI: 10.3346/jkms.2004.19.2.275] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
To gain molecular understanding of carcinogenesis of breast cancer, gene expression profiles were analyzed using cDNA microarray representing 4,600 cDNAs in 10 breast cancer samples and the adjacent noncancerous breast tissues from the same patients. The alterations in gene expression levels were confirmed by reversetranscription PCR in four randomly selected genes. Genes that were differently expressed in cancer and noncancerous tissues were identified. 106 (of which 55 were known) and 49 (of which 28 were known) genes were up- or down-regulated, respectively, in greater than 60% of the breast cancer samples. In cancer tissues, genes related to cell cycle, transcription, metabolism, cell structure/motility and signal transduction were mostly up-regulated. Furthermore, three cancer tissues showing immunohistochemically aberrant accumulation of beta-catenin in the nucleus and/or cytoplasm revealed down-regulation of Siah and Axin genes and up-regulation of Wnt and c-myc genes. These findings were highly consistent with Wnt signaling pathway associated with beta-catenin regulation previously suggested by others. Our studies, therefore, provide not only a molecular basis to understand biological processes of breast cancer but also useful resources to define the mechanism of beta-catenin expression in tumorigenesis of breast cancer.
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Affiliation(s)
- Mee Sook Roh
- Department of Pathology, Dong-A University College of Medicine, Busan, Korea.
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36
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Giatromanolaki A, Koukourakis MI, Simopoulos C, Polychronidis A, Sivridis E. Vascular endothelial growth factor (VEGF) expression in operable gallbladder carcinomas. Eur J Surg Oncol 2004; 29:879-83. [PMID: 14624781 DOI: 10.1016/j.ejso.2003.09.013] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
AIM To investigate the angiogenic and prognostic role of vascular endothelial growth factor (VEGF) in operable gallbladder carcinomas. METHODS Sixty patients with early gallbladder carcinomas, treated with surgery alone, were investigated immunohistochemically for the expression of VEGF, thymidine phosphorylase (TP) and new blood vessel formation. The results were correlated with clinico-pathological features and prognosis. RESULTS An increased VEGF secretion in gallbladder carcinomas was significantly associated with increased angiogenesis but not with patients survival, although high angiogenesis did relate with poor prognosis. TP was also associated with angiogenesis, but only the combined VEGF/TP expression was associated with unfavourable survival. Histological grade was another independent factor of prognosis. CONCLUSION Both VEGF and TP expression are associated with high rate of angiogenesis, a factor directly associated with prognosis. The combined expression of these angiogenic factors confer a particularly poor post-operative outcome, speculature.
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Affiliation(s)
- A Giatromanolaki
- Department of Pathology, Democritus University of Thrace, Alexandroupolis, Greece.
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37
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Gingrich DE, Reddy DR, Iqbal MA, Singh J, Aimone LD, Angeles TS, Albom M, Yang S, Ator MA, Meyer SL, Robinson C, Ruggeri BA, Dionne CA, Vaught JL, Mallamo JP, Hudkins RL. A New Class of Potent Vascular Endothelial Growth Factor Receptor Tyrosine Kinase Inhibitors: Structure−Activity Relationships for a Series of 9-Alkoxymethyl-12-(3-hydroxypropyl)indeno[2,1-a]pyrrolo[3,4-c]carbazole-5-ones and the Identification of CEP-5214 and Its Dimethylglycine Ester Prodrug Clinical Candidate CEP-7055. J Med Chem 2003; 46:5375-88. [PMID: 14640546 DOI: 10.1021/jm0301641] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of potent vascular endothelial growth factor R2 (VEGF-R2) tyrosine kinase inhibitors from a new indenopyrrolocarbazole template is reported. The structure-activity relationships for a series of 9-alkoxymethyl-12-(3-hydroxypropyl)indeno[2,1-a]pyrrolo[3,4-c]carbazole-5-ones revealed an optimal R9 substitution with ethoxymethyl 19 (VEGF-R2 IC(50) = 4 nM) and isopropoxymethyl 21 (VEGF-R2 IC(50) = 8 nM) being the most potent inhibitors in the series. The VEGF-R2 activity was reduced appreciably by increasing the size of the R9 alkoxy group or by alpha-methyl branching adjacent to the ring. The combined R9 alkoxymethyl and N12 hydroxypropyl substitutions were required for potent VEGF-R2 activity, and the corresponding thioether analogues were weaker than their ether counterparts. Compound 21 (R9 isopropoxymethyl, CEP-5214) was identified as a potent, low-nanomolar pan inhibitor of human VEGF-R tyrosine kinases, displaying IC(50) values of 16, 8, and 4 nM for VEGF-R1/FLT-1, VEGF-R2/KDR, and VEGF-R3/FLT-4, respectively, with cellular activity equivalent to the isolated enzyme activity. Compound 21 exhibited good selectivity against numerous tyrosine and serine/threonine kinases including PKC, Tie2, TrkA, CDK1, p38, JNK, and IRK. To increase water solubility and oral bioavailability, the N,N-dimethylglycine ester 40 was prepared. In pharmacokinetic studies in mice and rats, increased plasma levels of 21 were observed after oral administration of 40. Compound 21 demonstrated significant in vivo antitumor activity in numerous tumor models and was advanced into phase I clinical trials as the water-soluble N,N-dimethylglycine ester prodrug 40 (CEP-7055).
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Affiliation(s)
- Diane E Gingrich
- Departments of Medicinal Chemistry, Cephalon, Inc, 145 Brandywine Parkway, West Chester, Pennsylvania 19380, USA
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38
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Guntinas-Lichius O, Wittekindt C. The Role of Growth Factors for Disease and Therapy in Diseases of the Head and Neck. DNA Cell Biol 2003; 22:593-606. [PMID: 14577911 DOI: 10.1089/104454903322405473] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Growth factors are a large family of polypeptide molecules that regulate cell division in many tissues by autocrine or paracrine mechanisms. Depending on what receptors are activated, growth factors can initiate mitogenic, antiproliferative, or trophic effects, that is, growth factors act as positive or negative modulators of cell proliferation. Therefore, growth factors do not only play an important role in embryonic development and adult tissue homeostasis, but also in pathological situations like infection, wound healing, and tumorigenesis. Consequently, the application of growth factors, or vice versa the application of substances which are directed against growth factors like antigrowth factor antibodies, may have therapeutic applications. This review provides a brief account of what we know regarding growth factors in otorhinolaryngology, particularly in the field of otology, wound healing, oncology, peripheral nerve regeneration, and rhinology.
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Affiliation(s)
- O Guntinas-Lichius
- Clinic of Otolaryngology, Head and Neck Surgery, University of Cologne, Germany.
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39
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Nair S, Boczkowski D, Moeller B, Dewhirst M, Vieweg J, Gilboa E. Synergy between tumor immunotherapy and antiangiogenic therapy. Blood 2003; 102:964-71. [PMID: 12689940 DOI: 10.1182/blood-2002-12-3738] [Citation(s) in RCA: 135] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
This study tested the hypothesis that combination of antiangiogenic therapy and tumor immunotherapy of cancer is synergistic. To inhibit angiogenesis, mice were immunized with dendritic cells (DCs) transfected with mRNA that encode products that are preferentially expressed during neoangiogenesis: vascular endothelial growth factor receptor-2 (VEGFR-2) and Tie2 expressed in proliferating endothelial cells, and vascular endothelial growth factor (VEGF) expressed in the angiogenic stroma as well as the tumor cells used in this study. Immunization of mice against VEGF or VEGFR-2 stimulated cytotoxic T lymphocyte (CTL) responses and led to partial inhibition of angiogenesis. Antiangiogenic immunity was not associated with morbidity or mortality except for a transient impact on fertility seen in mice immunized against VEGFR-2, but not VEGF. Tumor growth was significantly inhibited in mice immunized against VEGF, VEGFR-2, and Tie2, either before tumor challenge or in the setting of pre-existing disease in murine B16/F10.9 melanoma and MBT-2 bladder tumor models. Coimmunization of mice against VEGFR-2 or Tie2 and total tumor RNA exhibited a synergistic antitumor effect. Synergism was also observed when mice were coimmunized with various combinations of defined tumor-expressed antigens, telomerase reverse transcriptase (TERT) or TRP-2, and VEGF or VEGFR-2. This study shows that coimmunizing mice against angiogenesis-associated and tumor-expressed antigens can deliver 2 compatible and synergistic cancer treatment modalities via a common treatment, namely immunization.
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MESH Headings
- Animals
- Antigens, Neoplasm/administration & dosage
- Antigens, Neoplasm/immunology
- Antigens, Neoplasm/therapeutic use
- Combined Modality Therapy
- Dendritic Cells/metabolism
- Dendritic Cells/transplantation
- Endothelial Growth Factors/genetics
- Endothelial Growth Factors/immunology
- Female
- Immunotherapy, Adoptive/adverse effects
- Immunotherapy, Adoptive/methods
- Infertility/etiology
- Intercellular Signaling Peptides and Proteins/genetics
- Intercellular Signaling Peptides and Proteins/immunology
- Lymphocyte Activation/immunology
- Lymphokines/genetics
- Lymphokines/immunology
- Male
- Mice
- Mice, Inbred Strains
- Neoplasm Proteins/immunology
- Neoplasms, Experimental/blood supply
- Neoplasms, Experimental/complications
- Neoplasms, Experimental/therapy
- Neovascularization, Pathologic/prevention & control
- Neovascularization, Pathologic/therapy
- Proto-Oncogene Proteins
- RNA, Neoplasm/administration & dosage
- RNA, Neoplasm/immunology
- RNA, Neoplasm/therapeutic use
- Receptor Protein-Tyrosine Kinases/genetics
- Receptor Protein-Tyrosine Kinases/immunology
- Receptor, TIE-2
- T-Lymphocytes, Cytotoxic/immunology
- Transfection
- Treatment Outcome
- Vascular Endothelial Growth Factor A
- Vascular Endothelial Growth Factor Receptor-2/genetics
- Vascular Endothelial Growth Factor Receptor-2/immunology
- Vascular Endothelial Growth Factors
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Affiliation(s)
- Smita Nair
- Center for Genetic and Cellular Therapies, Department of Surgery, Duke University Medical Center, Durham, NC 27710, USA
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40
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Goetz MP, Toft DO, Ames MM, Erlichman C. The Hsp90 chaperone complex as a novel target for cancer therapy. Ann Oncol 2003; 14:1169-76. [PMID: 12881371 DOI: 10.1093/annonc/mdg316] [Citation(s) in RCA: 244] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Heat shock protein 90 (Hsp90) is responsible for chaperoning proteins involved in cell signaling, proliferation and survival. 17-allylamino-17-demethoxygeldanamycin (17-AAG) is an anticancer agent currently in phase I trials in the USA and UK. It represents a class of drugs, the benzoquinone ansamycin antibiotics, capable of binding and disrupting the function of Hsp90, leading to the depletion of multiple oncogenic client proteins. MATERIALS AND METHODS Studies were identified through a PubMed search, review of bibliographies of relevant articles and review of abstracts from national meetings. RESULTS Preclinical studies have demonstrated that disruption of many client proteins chaperoned by Hsp90 is achievable and associated with significant growth inhibition, both in vitro and in tumor xenografts. Following an overview of the mechanism of action of ansamycin antibiotics and the pathways they disrupt, we review the current clinical status of 17-AAG, and discuss future directions for combinations of traditional antineoplastics with 17-AAG. CONCLUSIONS 17-AAG represents a class of drugs capable of affecting multiple targets in the signal transduction pathway involved in tumor cell proliferation and survival. Early results from phase I studies indicate that 17-AAG administration results in an acceptable toxicity profile while achieving in vivo disruption of client proteins.
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Affiliation(s)
- M P Goetz
- Division Medical Oncology, Department of Biochemistry, Mayo Graduate School, Rochester, MN 55905, USA
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41
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Eastwood EL, Schaus SE. Borrelidin induces the transcription of amino acid biosynthetic enzymes via a GCN4-dependent pathway. Bioorg Med Chem Lett 2003; 13:2235-7. [PMID: 12798341 DOI: 10.1016/s0960-894x(03)00406-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Global cellular profiling of messenger RNA levels has been used to provide insight into the effects of the angiogenesis inhibitor borrelidin on the eukaryotic model organism Saccharomyces cerevisiae. The most notable result of treatment with borrelidin is the induction of amino acid biosynthetic enzymes in a time-dependent fashion. We have ascertained that induction of this pathway involves the GCN4 transcription factor. This conclusion was determined by treating a yeast strain lacking this gene and observing the absence of increased gene transcription under Gcn4p control.
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Affiliation(s)
- Erin L Eastwood
- Department of Chemistry, Metcalf Center for Science and Engineering, Boston University, 590 Commonwealth Avenue, MA 02215, Boston, USA
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42
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Dkhissi F, Lu H, Soria C, Opolon P, Griscelli F, Liu H, Khattar P, Mishal Z, Perricaudet M, Li H. Endostatin exhibits a direct antitumor effect in addition to its antiangiogenic activity in colon cancer cells. Hum Gene Ther 2003; 14:997-1008. [PMID: 12869217 DOI: 10.1089/104303403766682250] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Endostatin has been considered a highly specific inhibitor of endothelial cell proliferation and/or migration. To explore the use of endostatin in antiangiogenic gene therapy, we generated a recombinant adenovirus, AdEndo, carrying the gene for mouse endostatin. Injection of 10(9) PFU of AdEndo resulted in a low but significant suppression (25%) of preestablished tumor growth in murine models involving murine Lewis lung carcinoma (LLC) and human breast cancer MDA-MB-231 tumors. Greater anticancer activity was observed when the same dose of AdEndo was injected into two other preestablished murine models involving C51 murine colon cancer and HT29 human colon cancer (55 and 47% tumor growth reduction, respectively). In vitro, endostatin derived from AdEndo-infected MRC-5 fibroblasts inhibited the growth of C51 and HT29 cell lines (72 and 61%, respectively). The extent of this inhibition was comparable to that observed in endothelial cells: 75% for microcapillary endothelial cell line HMEC-1, 52% for human dermal microvascular endothelial cells, 46% for human umbilical vein endothelial cells, and 67% for calf pulmonary arterial endothelial cells. Both endothelial and colon cancer cells showed a clear increase in cell apoptosis (4- to 5-fold for endothelial cells and 5- to 10-fold for colon cancer cells) and an accumulation in the G(1) phase of the cell cycle. This antiproliferative activity was not observed in other tumor cell lines: LLC, MDA-MB-231, murine colon adenocarcinoma MC38, human prostate cancer cell line DU145, and human breast cancer cell line CAL51. Taken together, these results provide evidence that, in addition to its antiangiogenic activity, endostatin exerts a direct anticancer action that appears to be restricted to some tumor cell lines. Thus, endostatin could be used in some colon cancer treatments and its clinical efficacy would depend on the response of tumor cells themselves.
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Affiliation(s)
- Fatima Dkhissi
- U553 INSERM, Institut d'Hématologie, Université Paris 7, Hôpital Saint-Louis, 75475 Paris cedex 10, France
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43
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Vincent L, Varet J, Pille JY, Bompais H, Opolon P, Maksimenko A, Malvy C, Mirshahi M, Lu H, Vannier JP, Soria C, Li H. Efficacy of dendrimer-mediated angiostatin and TIMP-2 gene delivery on inhibition of tumor growth and angiogenesis: in vitro and in vivo studies. Int J Cancer 2003; 105:419-29. [PMID: 12704680 DOI: 10.1002/ijc.11105] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Gene transfer is an attractive approach to fight cancer by targeting cancer cells or their vasculature. Our study reports the inhibition of tumor growth and angiogenesis by a nonviral method using dendrimers associated with 36-mer anionic oligomers (ON36) for delivering angiostatin (Kringle 1-3) and tissue inhibitor of metalloproteinase (TIMP)-2 genes. The optimal concentrations of dendrimers and ON36 for an efficient green fluorescent protein (GFP) plasmid delivery in endothelial cells (HMEC-1) and cancer cells (MDA-MB-435) were first chosen. Then the efficacy of transfection was determined by testing angiostatin and TIMP-2 secretion by Western blot and the biologic effects were evaluated. Angiostatin gene transfer markedly reduced in vitro (i) HMEC-1 but not MDA-MB-435 proliferation; (ii) HMEC-1 and MDA-MB-435 wound healing reparation; and (iii) capillary tube formation. TIMP-2 gene transfer did not affect cell proliferation but strongly inhibited (i) wound healing of HMEC-1 and MDA-MB-435 cells; and (ii) capillary tube formation. Supernatants of transfected-MDA-MB-435 cells also inhibited the formation of angiogenic networks on Matrigel, indicating a paracrine effect. In vivo, intratumoral angiostatin or TIMP-2 gene delivery using dendrimers associated with ON36 effectively inhibited tumor growth by 71% and 84%, respectively. Combined gene transfer resulted in 96% inhibition of tumor growth. Tumor-associated vascularization was also greatly reduced. These findings provide a basis for the further development of nonviral delivery of genes to fight cancer.
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Affiliation(s)
- Loïc Vincent
- Laboratoire de Différenciation Hématopoïétique, Faculté de Médecine et Pharmacie, Rouen, France
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44
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Abstract
Anticancer drug discovery has shifted from an empiric random screening directed approach to a more rational and mechanistic, target-based approach, which reflects our rapidly expanding knowledge of the pathogenesis of a variety of forms of cancer at the molecular level, providing new targets for drug discovery and development. The clinical development of target-based anticancer drugs will require fundamental changes to the traditional clinical trial design and end points that have been used for conventional cytotoxic drugs. In the phase I and II settings, traditional end points (toxicity and response) may not be suitable for more selective, cytostatic target-based agents, and these end points may be replaced by biological or pharmacokinetic end points to define the optimal doses and the therapeutic effects of these drugs on their targets. For phase III trials, measurable clinical benefit will continue to be the primary end point. As our understanding of the complex pathways and networks controlling cell signaling, proliferation, and cell death expands, we must learn how and when to use agents to target specific steps in malignant transformation and proliferation, and we must adapt clinical trial design to test the clinical utility of this promising new class of anticancer drugs.
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Affiliation(s)
- Elizabeth Fox
- Center for Cancer Research, National Cancer Institute, Bethesda, Maryland, USA.
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45
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Giatromanolaki A, Koukourakis MI, Kakolyris S, Mavroudis D, Kouroussis C, Mavroudi C, Perraki M, Sivridis E, Georgoulias V. Assessment of highly angiogenic and disseminated in the peripheral blood disease in breast cancer patients predicts for resistance to adjuvant chemotherapy and early relapse. Int J Cancer 2003; 108:620-7. [PMID: 14696130 DOI: 10.1002/ijc.11593] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The assessment of tumor molecular features in combination with the detection of occult malignant cells may provide important clinical information, beyond the standard staging of breast cancer. Using a nested RT-PCR technique, we assessed prospectively the presence of cytokeratin-19 (CK19) mRNA positive cells in the blood of 100 operated patients with breast cancer before the initiation of adjuvant chemotherapy and local radiotherapy. Tissue samples were prospectively collected and analyzed for estrogen (ER) and progesterone (PgR) receptor, c-erbB-2 overexpression, mutant-p53 and bcl-2 protein accumulation, proliferation index and microvessel density (MVD). CK-19 mRNA-positive cells were detected in the peripheral blood of 33% of patients. Simultaneous display of high intratumoral MVD and of CK-19 mRNA-positive cells, which characterized highly angiogenic and disseminated in the peripheral blood (HAD) disease was noted in 25% of patients. Detection of CK-19 positive cells was significantly associated with increased MVD (p = 0.002). In univariate analysis (median follow-up 30 months) CK19 mRNA detection and MVD were the most significant factors related to a short relapse-free survival (RFS), (p < 0.0001). In multivariate analysis, CK19 positivity, high MVD and c-erbB-2 overexpression were the only significant and independent variables associated with relapse (p = 0.0005, 0.03 and 0.04, respectively). Patients with HAD had an expected relapse rate close to 70% vs. <5% in the remaining patients irrespectively of the used chemotherapy regimen. The simultaneous presence of high MVD and CK19-positive cells in the blood of patients with early breast is linked with poor prognosis, which cannot be improved with standard chemotherapy regimens.
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MESH Headings
- Adult
- Aged
- Biomarkers, Tumor/genetics
- Breast Neoplasms/blood
- Breast Neoplasms/blood supply
- Chemotherapy, Adjuvant
- Drug Resistance, Neoplasm
- Female
- Humans
- Keratins/blood
- Keratins/genetics
- Middle Aged
- Neoplasm Staging
- Neovascularization, Pathologic/blood
- Prognosis
- Prospective Studies
- Proto-Oncogene Proteins c-bcl-2/blood
- Proto-Oncogene Proteins c-bcl-2/genetics
- RNA, Messenger/metabolism
- RNA, Neoplasm/blood
- Receptor, ErbB-2/blood
- Receptor, ErbB-2/genetics
- Receptors, Estrogen/blood
- Receptors, Estrogen/genetics
- Receptors, Progesterone/blood
- Receptors, Progesterone/genetics
- Survival Rate
- Tumor Suppressor Protein p53/genetics
- Tumor Suppressor Protein p53/metabolism
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46
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te Velde EA, Vogten JM, Gebbink MFGB, van Gorp JM, Voest EE, Borel Rinkes IHM. Enhanced antitumour efficacy by combining conventional chemotherapy with angiostatin or endostatin in a liver metastasis model. Br J Surg 2002; 89:1302-9. [PMID: 12296902 DOI: 10.1046/j.1365-2168.2002.02183.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Background
Tumour-induced microvascular networks have become attractive targets in cancer therapy. Strategies that target both tumour cells and vasculature have not been investigated in models of early metastatic colorectal disease. The efficacy of a combination of conventional chemotherapy with a potent angiogenesis inhibitor (endostatin or angiostatin) in a murine model of early colorectal liver metastasis was studied.
Methods
Sixty-six mice were subjected to intrasplenic injection of C26 tumour cells to induce colorectal liver metastases. Control animals received phosphate-buffered saline (n = 8) or citrate buffer (n = 8). Treatment included conventional chemotherapy (n = 9), endostatin (n = 8), high-dose (n = 5) or low-dose (one-tenth of optimal dose; n = 10) angiostatin, as well as the combination of either of these drugs with chemotherapy (n > 5). Clinical appearance was scored daily using a semiquantitative scale. Liver weight, macroscopic and histological tumour involvement (hepatic replacement area; HRA) were measured upon death at day 12.
Results
Treated mice displayed significantly better clinical scores than controls, except for those animals treated with low-dose angiostatin with or without chemotherapy. Treatment with conventional chemotherapy resulted in a decrease in HRA from 42·3 to 29·1 per cent (P < 0·001). The addition of angiostatin or endostatin to conventional chemotherapy improved antitumoral efficacy, in a multiplicative manner, resulting in a HRA of approximately 3·5 per cent (P < 0·001).
Conclusion
The addition of angiostatin or endostatin to conventional chemotherapy enhanced antitumoral efficacy in a murine model of early colorectal liver metastasis.
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Affiliation(s)
- E A te Velde
- Department of Surgery and Laboratory of Medical Oncology, University Medical Centre Utrecht, Utrecht, The Netherlands
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47
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Hill SA, Chaplin DJ, Lewis G, Tozer GM. Schedule dependence of combretastatin A4 phosphate in transplanted and spontaneous tumour models. Int J Cancer 2002; 102:70-4. [PMID: 12353236 DOI: 10.1002/ijc.10655] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Tubulin depolymerizing drugs that selectively disrupt tumour-associated vasculature have recently been identified. The lead drug in this class, combretastatin A4 phosphate (CA4P), has just completed Phase I clinical trial. Previous studies have focussed on the effects of single drug doses and have demonstrated little or no retardation of tumour growth when CA4P is used alone, but significant benefit when it is combined with conventional treatment. We have investigated the effects of multiple daily or twice daily dosing with CA4P on the vascular function, cell survival and growth of syngeneic and spontaneous breast cancers in mice. In both transplanted and spontaneous tumours significant growth retardation is observed if CA4P is administered daily (10 doses x 50 mg/kg), whereas no significant effects are seen if the same total dose (500 mg/kg) is administered as a single bolus injection. This effect is attributed, at least in part, to anti-proliferative effects on the tumour and endothelial cells, which retard the revascularisation and repopulation of the tumour core that is initially necrosed by the drug treatment. Further investigation of dose scheduling showed that the initial anti-vascular effects of CA4P are enhanced by administering the drug in 2 equal doses separated between 2 and 6 hr. The twice daily dosing schedule (25 mg/kg twice a day) produced increased growth retardation compared to the 50 mg/kg once a day schedule in the transplanted CaNT tumour. It did not do so in the spontaneous T138 tumour model. These studies indicate that the potential anti-tumour activity of CA4P when used as a single agent in clinical trials may be enhanced when used in multiple dose schedules.
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Affiliation(s)
- Sally A Hill
- Tumour Microcirculation Group, Gray Cancer Institute, Mount Vernon Hospital, Northwood, Middlesex, United Kingdom.
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48
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Abstract
With an increasing number of targeted agents available for testing, clinical trials must be rationally designed based on sound knowledge of the molecular mechanisms linking target and disease, fortified by strong preclinical data demonstrating how this relationship is modified by the targeted agent. Patients and resources are precious and should be expended judiciously on clinical trials that are well planned. Although traditional trial designs and endpoints may not be adequate for developing contemporary targeted drugs, transiting directly from phase I to phase III testing should be avoided except in distinct circumstances. Increased research efforts should be spent on the prospective evaluation and validation of novel biologic endpoints and innovative clinical designs, such that promising targeted agents can be effectively developed to benefit the care of cancer patients.
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Affiliation(s)
- Brigette B Y Ma
- Department of Medical Oncology, Princess Margaret Hospital, University Health Network, 610 University Avenue, Toronto, ON M5G 2M9, Canada
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49
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Shotwell JB, Krygowski ES, Hines J, Koh B, Huntsman EWD, Choi HW, Schneekloth JS, Wood JL, Crews CM. Total synthesis of luminacin D. Org Lett 2002; 4:3087-9. [PMID: 12201723 PMCID: PMC2556570 DOI: 10.1021/ol026382q] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] A highly convergent synthesis of the angiogenesis inhibitor luminacin D has been achieved in 13 linear steps (19 steps total, 5.3% overall yield) utilizing a samarium(II) iodide-mediated mixed tandem aldol/Evans-Tishchenko reaction to construct the carbohydrate precursor. The modular synthetic design will allow derivatization at key positions necessary for biochemical mode of action studies.
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Affiliation(s)
- J. Brad Shotwell
- Sterling Chemistry Laboratory, Department of Chemistry, Yale University, New Haven, Connecticut 06520
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, Connecticut 06520
| | - Evan S. Krygowski
- Sterling Chemistry Laboratory, Department of Chemistry, Yale University, New Haven, Connecticut 06520
| | - John Hines
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, Connecticut 06520
| | - Brian Koh
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, Connecticut 06520
| | - Elliott W. D. Huntsman
- Sterling Chemistry Laboratory, Department of Chemistry, Yale University, New Haven, Connecticut 06520
| | - Hui Won Choi
- Sterling Chemistry Laboratory, Department of Chemistry, Yale University, New Haven, Connecticut 06520
| | - John S. Schneekloth
- Sterling Chemistry Laboratory, Department of Chemistry, Yale University, New Haven, Connecticut 06520
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, Connecticut 06520
| | - John L. Wood
- Sterling Chemistry Laboratory, Department of Chemistry, Yale University, New Haven, Connecticut 06520
| | - Craig M. Crews
- Sterling Chemistry Laboratory, Department of Chemistry, Yale University, New Haven, Connecticut 06520
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, Connecticut 06520
- Department of Pharmacology, Yale University, New Haven, Connecticut 06520
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50
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Webb SD, Sherratt JA, Fish RG. Cells behaving badly: a theoretical model for the Fas/FasL system in tumour immunology. Math Biosci 2002; 179:113-29. [PMID: 12208611 DOI: 10.1016/s0025-5564(02)00120-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
One proposed mechanism of tumour escape from immune surveillance is tumour up-regulation of the cell surface ligand FasL, which can lead to apoptosis of Fas receptor (Fas) positive lymphocytes. Based upon this 'counterattack', we have developed a mathematical model involving tumour cell-lymphocyte interaction, cell surface expression of Fas/FasL, and their secreted soluble forms. The model predicts that (a) the production of soluble forms of Fas and FasL will lead to the down-regulation of the immune response; (b) matrix metalloproteinase (MMP) inactivation should lead to increased membrane FasL and result in a higher rate of Fas-mediated apoptosis for lymphocytes than for tumour cells. Recent studies on cancer patients lend support for these predictions. The clinical implications are two-fold. Firstly, the use of broad spectrum MMP inhibitors as anti-angiogenic agents may be compromised by their adverse effect on tumour FasL up-regulation. Also, Fas/FasL interactions may have an impact on the outcome of numerous ongoing immunotherapeutic trials since the final common pathway of all these approaches is the transduction of death signals within the tumour cell.
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Affiliation(s)
- Steven D Webb
- Department of Mathematical Sciences, Loughborough University, Leicestershire, LE11 3TU, UK.
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