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Kazakova AN, Lukina MM, Anufrieva KS, Bekbaeva IV, Ivanova OM, Shnaider PV, Slonov A, Arapidi GP, Shender VO. Exploring the diversity of cancer-associated fibroblasts: insights into mechanisms of drug resistance. Front Cell Dev Biol 2024; 12:1403122. [PMID: 38818409 PMCID: PMC11137237 DOI: 10.3389/fcell.2024.1403122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 04/22/2024] [Indexed: 06/01/2024] Open
Abstract
Introduction: Among the various stromal cell types within the tumor microenvironment, cancer-associated fibroblasts (CAFs) emerge as the predominant constituent, exhibiting a diverse array of oncogenic functions not intrinsic to normal fibroblasts. Their involvement spans across all stages of tumorigenesis, encompassing initiation, progression, and metastasis. Current understanding posits the coexistence of distinct subpopulations of CAFs within the tumor microenvironment across a spectrum of solid tumors, showcasing both pro- and antitumor activities. Recent advancements in single-cell transcriptomics have revolutionized our ability to meticulously dissect the heterogeneity inherent to CAF populations. Furthermore, accumulating evidence underscores the pivotal role of CAFs in conferring therapeutic resistance to tumors against various drug modalities. Consequently, efforts are underway to develop pharmacological agents specifically targeting CAFs. Methods: This review embarks on a comprehensive analysis, consolidating data from 36 independent single-cell RNA sequencing investigations spanning 17 distinct human malignant tumor types. Results: Our exploration centers on elucidating CAF population markers, discerning their prognostic relevance, delineating their functional contributions, and elucidating the underlying mechanisms orchestrating chemoresistance. Discussion: Finally, we deliberate on the therapeutic potential of harnessing CAFs as promising targets for intervention strategies in clinical oncology.
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Affiliation(s)
- Anastasia N. Kazakova
- Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
- Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Russia
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
| | - Maria M. Lukina
- Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
- Institute of Experimental Oncology and Biomedical Technologies, Privolzhsky Research Medical University, Nizhny Novgorod, Russia
| | - Ksenia S. Anufrieva
- Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
| | - Irina V. Bekbaeva
- Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
- Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Russia
| | - Olga M. Ivanova
- Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
- Institute for Regenerative Medicine, Sechenov University, Moscow, Russia
| | - Polina V. Shnaider
- Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
- Faculty of Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Andrey Slonov
- Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
| | - Georgij P. Arapidi
- Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
- Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Russia
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
- Shemyakin–Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Moscow, Russia
| | - Victoria O. Shender
- Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Lopukhin Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, Moscow, Russia
- Shemyakin–Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Moscow, Russia
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2
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Zhang X, Li Q, Du A, Li Y, Shi Q, Chen Y, Zhao Y, Wang B, Pan F. Adipocytic Glutamine Synthetase Upregulation via Altered Histone Methylation Promotes 5FU Chemoresistance in Peritoneal Carcinomatosis of Colorectal Cancer. Front Oncol 2021; 11:748730. [PMID: 34712612 PMCID: PMC8547656 DOI: 10.3389/fonc.2021.748730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 09/22/2021] [Indexed: 11/18/2022] Open
Abstract
The development of resistance to 5-fluorouracil (5FU) chemotherapy is a major handicap for sustained effective treatment in peritoneal carcinomatosis (PC) of colorectal cancer (CRC). Metabolic reprogramming of adipocytes, a component of the tumor microenvironment and the main composition of peritoneum, plays a significant role in drug resistance of PC, with the mechanisms being not fully understood. By performing metabolomics analysis, we identified glutamine (Gln), an important amino acid, inducing resistance to 5FU-triggered tumor suppression of CRC-PC through activating mTOR pathway. Noteworthily, genetic overexpression of glutamine synthetase (GS) in adipocytes increased chemoresistance to 5FU in vitro and in vivo while this effect was reversed by pharmacological blockage of GS. Next, we showed that methionine metabolism were enhanced in amino acid omitted from CRC-PC of GS transgenic (TgGS) mice, increasing intracellular levels of S-carboxymethy-L-cys. Moreover, loss of dimethylation at lysine 4 of histone H3 (H3k4me2) was found in adipocytes in vitro, which may lead to increased expression of GS. Furthermore, biochemical inhibition of lysine specific demethylase 1 (LSD1) restored H3k4me2, thereby reducing GS-induced chemoresistance to 5FU. Our findings indicate that GS upregulation-induced excessive of Gln in adipocytes via altered histone methylation is potential mediator of resistance to 5FU chemotherapy in patients with CRC-PC.
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Affiliation(s)
- Xuan Zhang
- Department of Oncology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China.,Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Qing Li
- Department of Science and Education, The People's Hospital of Tongliang District, Chongqing, China
| | - Aibei Du
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Yifei Li
- Department of Hematology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Qing Shi
- Department of Respiratory Medicine, The People's Hospital of Tongliang District, Chongqing, China
| | - Yanrong Chen
- Department of Oncology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Yang Zhao
- Department of Oncology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Bin Wang
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Feng Pan
- Department of Oncology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, China
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Tan C, Liu W, Zheng ZH, Wan XG. LncRNA HOTTIP inhibits cell pyroptosis by targeting miR-148a-3p/AKT2 axis in ovarian cancer. Cell Biol Int 2021; 45:1487-1497. [PMID: 33710684 DOI: 10.1002/cbin.11588] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 02/26/2021] [Accepted: 03/07/2021] [Indexed: 12/28/2022]
Abstract
Long noncoding RNA HOTTIP is a crucial regulator in multiple types of cancer, including ovarian cancer (OC). However, the biological roles and underlying mechanisms of HOTTIP in OC have rarely been studied. Hence, this study aimed to investigate the functional correlation between HOTTIP and pyroptosis in OC progression. The expression of HOTTIP in OC tissues and cell lines was characterized by quantitative real-time PCR. Cell proliferation was evaluated using Cell Counting Kit-8 and clone formation assays. Western blot was performed to quantify protein levels. A dual-luciferase reporter assay was used to analyze the molecular interaction among HOTTIP, miR-148a-3p, and AKT2. The expression of HOTTIP was significantly upregulated in OC tissue samples and cell lines. The silencing of HOTTIP led to the inhibition of cell proliferation and NLRP1 inflammasome-mediated pyroptosis. In addition, HOTTIP increased AKT2 expression by negatively regulating miR-148a-3p and then inhibited ASK1/JNK signaling. Further rescue experiments revealed that downregulation of miR-148a-3p and overexpression of AKT2 obviously diminished the effects of HOTTIP downregulation in OC cells. Thus, our study elucidated a novel pyroptosis-related mechanism by which HOTTIP participated in OC progression, which might provide a theoretical reference for clinical treatment.
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Affiliation(s)
- Cai Tan
- Department of Health, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi Province, PR China
| | - Wei Liu
- Department of Reproductive Health, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi Province, PR China
| | - Zhi-Hua Zheng
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, PR China
| | - Xiao-Gang Wan
- Department of General Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, PR China
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4
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The role of epithelial-mesenchymal transition-regulating transcription factors in anti-cancer drug resistance. Arch Pharm Res 2021; 44:281-292. [PMID: 33768509 PMCID: PMC8009775 DOI: 10.1007/s12272-021-01321-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 03/14/2021] [Indexed: 12/16/2022]
Abstract
The complex orchestration of gene expression that mediates the transition of epithelial cells into mesenchymal cells is implicated in cancer development and metastasis. As the primary regulator of the process, epithelial-mesenchymal transition-regulating transcription factors (EMT-TFs) play key roles in metastasis. They are also highlighted in recent preclinical studies on resistance to cancer therapy. This review describes the role of three main EMT-TFs, including Snail, Twist1, and zinc-finger E homeobox-binding 1 (ZEB1), relating to drug resistance and current possible approaches for future challenges targeting EMT-TFs.
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5
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D'Esposito V, Ambrosio MR, Giuliano M, Cabaro S, Miele C, Beguinot F, Formisano P. Mammary Adipose Tissue Control of Breast Cancer Progression: Impact of Obesity and Diabetes. Front Oncol 2020; 10:1554. [PMID: 32850459 PMCID: PMC7426457 DOI: 10.3389/fonc.2020.01554] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 07/20/2020] [Indexed: 12/19/2022] Open
Abstract
Mammary adipose tissue (AT) is necessary for breast epithelium. However, in breast cancer (BC), cell-cell interactions are deregulated as the tumor chronically modifies AT microenvironment. In turn, breast AT evolves to accommodate the tumor, and to participate to its dissemination. Among AT cells, adipocytes and their precursor mesenchymal stem cells (MSCs) play a major role in supporting tumor growth and dissemination. They provide energy supplies and release a plethora of factors involved in cancer aggressiveness. Here, we discuss the main molecular mechanisms underlining the interplay between adipose (adipocytes and MSCs) and BC cells. Following close interactions with BC cells, adipocytes lose lipids and change morphology and secretory patterns. MSCs also play a major role in cancer progression. While bone marrow MSCs are recruited by BC cells and participate in metastatic process, mammary AT-MSCs exert a local action by increasing the release of cytokines, growth factors and extracellular matrix components and become principal actors in cancer progression. Common systemic metabolic diseases, including obesity and diabetes, further modify the interplay between AT and BC. Indeed, metabolic perturbations are accompanied by well-known alterations of AT functions, which might contribute to worsen cancer phenotype. Here, we highlight how metabolic alterations locally affect mammary AT and interfere with the molecular mechanisms of bidirectional communication between adipose and cancer cells.
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Affiliation(s)
- Vittoria D'Esposito
- URT Genomics of Diabetes, Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy.,Department of Translational Medicine, University of Naples Federico II, Naples, Italy
| | - Maria Rosaria Ambrosio
- URT Genomics of Diabetes, Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy.,Department of Translational Medicine, University of Naples Federico II, Naples, Italy
| | - Mario Giuliano
- Department of Clinical Medicine and Surgery, University of Naples Federico II, Naples, Italy
| | - Serena Cabaro
- URT Genomics of Diabetes, Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy.,Department of Translational Medicine, University of Naples Federico II, Naples, Italy
| | - Claudia Miele
- URT Genomics of Diabetes, Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy.,Department of Translational Medicine, University of Naples Federico II, Naples, Italy
| | - Francesco Beguinot
- URT Genomics of Diabetes, Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy.,Department of Translational Medicine, University of Naples Federico II, Naples, Italy
| | - Pietro Formisano
- URT Genomics of Diabetes, Institute of Experimental Endocrinology and Oncology, National Research Council, Naples, Italy.,Department of Translational Medicine, University of Naples Federico II, Naples, Italy
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6
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Choi J, Cha YJ, Koo JS. Adipocyte biology in breast cancer: From silent bystander to active facilitator. Prog Lipid Res 2018; 69:11-20. [DOI: 10.1016/j.plipres.2017.11.002] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 11/20/2017] [Accepted: 11/20/2017] [Indexed: 12/12/2022]
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7
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Qin S, Zhang B, Xiao G, Sun X, Li G, Huang G, Gao X, Li X, Wang H, Yang C, Ren H. Fibronectin protects lung cancer cells against docetaxel-induced apoptosis by promoting Src and caspase-8 phosphorylation. Tumour Biol 2016; 37:13509-13520. [PMID: 27465556 DOI: 10.1007/s13277-016-5206-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 07/13/2016] [Indexed: 01/05/2023] Open
Abstract
Fibronectin is involved in orchestrating many diverse cellular behaviors, including adhesion, invasion, differentiation, and proliferation and recently has also been shown to participate in the development of chemoresistance. In this study, we found that fibronectin expression was inversely correlated with clinical responses to docetaxel treatment in non-small cell lung cancer patients. Subsequently, we showed that fibronectin pretreatment could enhance cell viability and reduce apoptosis in docetaxel-treated lung cancer cells because fibronectin induced phosphorylated Src and caspase-8, rendering the later inactive, thus inhibiting docetaxel-induced apoptosis. The inhibition of apoptosis by fibronectin was found to be enhanced by Src overexpression and reversed by Src knockdown in lung cancer cells. Further investigation revealed that a downregulation of phospho-Src via treatment with a Src kinase inhibitor could also abolish fibronectin activity and recover docetaxel-induced apoptosis. Molecular studies revealed that this reversion was due to decreased phospho-Src levels rather than a reduction in total Src expression. Inhibition of phospho-Src reduced phospho-caspase-8 and promoted caspase-8 activity, restoring apoptosis following docetaxel and fibronectin co-treatment. Finally, xenografts experiments demonstrated that fibronectin promoted lung cancer cell proliferation during docetaxel treatment in vivo. Our findings indicate that fibronectin promotes Src and caspase-8 phosphorylation in lung cancer cells, which decreases caspase-8 activation and protects tumor cells from docetaxel-induced apoptosis. Therefore, the fibronectin/Src/caspase-8 pathway may play a crucial role in docetaxel resistance in lung cancer.
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Affiliation(s)
- Sida Qin
- Department Two of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Boxiang Zhang
- Department Two of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Guodong Xiao
- Department Two of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Xin Sun
- Department Two of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Gang Li
- Department Two of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Guanghong Huang
- Department Two of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Xiao Gao
- Department Two of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Xiang Li
- Department Two of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Huangzhen Wang
- Department Two of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, Shaanxi, 710061, China
| | - Chengcheng Yang
- Department of Oncology, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, Shaanxi, 710061, China.
| | - Hong Ren
- Department Two of Thoracic Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, 277 West Yanta Road, Xi'an, Shaanxi, 710061, China.
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8
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Roy D, Das K, Mondal S, Bhowmick D, Dey S, Majumder GC, Mukherjee B, Bhattacharyya D. Epididymal protein ASF is a D-galactose-specific lectin with apoptotic effect on human breast cancer cell line MCF7. Int J Biol Macromol 2015; 84:208-20. [PMID: 26706839 DOI: 10.1016/j.ijbiomac.2015.12.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 12/09/2015] [Accepted: 12/10/2015] [Indexed: 11/27/2022]
Abstract
Isolated caprine epididymal plasma glycoprotein "anti sticking factor" (ASF) interacts with caudal sperm surface in a D-galactose dependent manner. ASF acts as a Ca(2+) dependent soluble lectin principally activated in acidic pH. As a D-galactose specific lectin, it has a specific affinity for fibronectin as well as fibronectin receptor, i.e. integrins α5β3 and α5β1. By virtue of this particular property, it hampers the in vitro adhesion of the adherent breast cancer cell MCF7 with fibronectin. The effective anti-adhesive concentration of ASF promotes p53 dependent apoptosis in MCF7, which was established by Hoechst 33342 staining, DNA fragmentation assay, FITC tagged Annexin-V flowcytometry and western blot analysis. We suggest that ASF inhibits fibronectin-integrin interactions by binding with them and induces adhesion dependent apoptosis on adherent MCF7.
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Affiliation(s)
- Debarun Roy
- Division of Cryobiology, Centre for Rural and Cryogenic Technologies, Jadavpur University, Kolkata, 700032 West Bengal, India
| | - Kaushik Das
- Cell Biology and Physiology Division, Indian Institute of Chemical Biology, 4 Raja S.C. Mullick Road, Jadavpur, Kolkata, 700032 West Bengal, India
| | - Subhasish Mondal
- Department of Pharmaceutical Technology, Jadavpur University, Kolkata, 700032 West Bengal, India
| | - Debajit Bhowmick
- CU-BD Center of Excellence for Nanobiotechnology, Centre for Research in Nanoscience and Nanotechnology, Calcutta University, JD-2, Sector-III, Kolkata, 700098 West Bengal, India
| | - Souvik Dey
- Division of Cryobiology, Centre for Rural and Cryogenic Technologies, Jadavpur University, Kolkata, 700032 West Bengal, India
| | - Gopal C Majumder
- Division of Cryobiology, Centre for Rural and Cryogenic Technologies, Jadavpur University, Kolkata, 700032 West Bengal, India
| | - Biswajit Mukherjee
- Department of Pharmaceutical Technology, Jadavpur University, Kolkata, 700032 West Bengal, India
| | - Debdas Bhattacharyya
- Division of Cryobiology, Centre for Rural and Cryogenic Technologies, Jadavpur University, Kolkata, 700032 West Bengal, India.
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Pereira L, Horta S, Mateus R, Videira MA. Implications of Akt2/Twist crosstalk on breast cancer metastatic outcome. Drug Discov Today 2015; 20:1152-8. [PMID: 26136161 DOI: 10.1016/j.drudis.2015.06.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 06/01/2015] [Accepted: 06/17/2015] [Indexed: 12/19/2022]
Abstract
Akt2 is a pivotal player in a complex web of signaling pathways controlling cell growth, proliferation, and survival. The deregulation or aberrations of Akt2 have been associated with tumor progression, metastatic spread, and, lastly, chemoresistance. The impairment of its activity has gained more attention because Akt2 is intertwined with a range of signaling paths, including the Phosphatidylinositol 3 kinase/Akt/Mammalian target of rapamycin (PI3K/mTOR) signaling axis, which are involved in macromolecules synthesis and metabolism. Here, we focus on Akt2 because of its involvement in the acquisition of stem cell-like properties, responsible for invasiveness and chemoresistance, also promoted by Twist. We also suggest therapeutic strategies targeting Akt2 to overcome the drawbacks of current cancer therapies.
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Affiliation(s)
- Lucília Pereira
- Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
| | - Sara Horta
- iMed.UL, Research Institute for Medicines and Pharmaceutical Sciences, Faculdade de Farmácia, Universidade de Lisboa, Lisbon, Portugal
| | - Rita Mateus
- iMed.UL, Research Institute for Medicines and Pharmaceutical Sciences, Faculdade de Farmácia, Universidade de Lisboa, Lisbon, Portugal
| | - Mafalda A Videira
- iMed.UL, Research Institute for Medicines and Pharmaceutical Sciences, Faculdade de Farmácia, Universidade de Lisboa, Lisbon, Portugal.
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10
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Yan L, Wang C, Lin B, Liu J, Liu D, Hou R, Wang Y, Gao L, Zhang S, Iwamori M. Lewis y enhances CAM-DR in ovarian cancer cells by activating the FAK signaling pathway and upregulating Bcl-2/Bcl-XL expression. Biochimie 2015; 113:17-25. [PMID: 25726913 DOI: 10.1016/j.biochi.2015.01.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 01/25/2015] [Indexed: 02/05/2023]
Abstract
Oligosaccharides on the surface of adhesion molecules may contribute to the process of CAM-DR. To investigate the role of the Lewis y antigen in this process, we established a cell adhesion model mediated by the integrin α5β1-FN interaction in the ovarian cancer cell line, RMG-1-hFUT, which highly expresses Lewis y by transfection with α1,2-fucosyltransferase into RMG-1 cells. Our results indicate that the rates of carboplatin-induced apoptosis and necrosis are reduced in FN-adhered tumor cells, and carboplatin resistance is significantly decreased in the presence of anti-Lewis y antibody. CAM-DR in tumor cells has been correlated with elevated expression of the nuclear anti-apoptotic proteins Bcl-2 and Bcl-XL. Lewis y promotes the expression of the Bcl-2 and Bcl-XL genes by activating the focal adhesion kinase signaling pathway and accelerating their transcription. Thus, Lewis y leads to inhibition of apoptosis and enhancement of CAM-DR by activation of the FAK signaling pathway and upregulation of Bcl-2/Bcl-XL expression in ovarian cancer cell lines.
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Affiliation(s)
- Limei Yan
- Department of Obstetrics and Gynecology, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, PR China
| | - Changzhi Wang
- Department of Obstetrics and Gynecology, Shantou University Medical College, Shantou 515000, PR China
| | - Bei Lin
- Department of Obstetrics and Gynecology, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, PR China.
| | - Juanjuan Liu
- Department of Obstetrics and Gynecology, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, PR China
| | - Dawo Liu
- Department of Obstetrics and Gynecology, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, PR China
| | - Rui Hou
- Department of Obstetrics and Gynecology, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, PR China
| | - Yifei Wang
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Dalian Medical University, Dalian 116027, PR China
| | - Lili Gao
- Department of Obstetrics and Gynecology, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, PR China
| | - Shulan Zhang
- Department of Obstetrics and Gynecology, Shengjing Hospital Affiliated to China Medical University, Shenyang 110004, PR China
| | - Masao Iwamori
- Department of Biochemistry, Faculty of Science and Technology, Kinki University, 3-4-1 Kowakae, Higashiosaka, Osaka 577-8502, Japan
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11
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let-7b and let-7c are determinants of intrinsic chemoresistance in renal cell carcinoma. World J Surg Oncol 2015; 13:175. [PMID: 25951903 PMCID: PMC4426556 DOI: 10.1186/s12957-015-0596-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Accepted: 04/24/2015] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Renal cell carcinoma (RCC) is characterized by inherent resistance to chemotherapy. Earlier studies demonstrated that microRNAs (miRNAs) might be involved in the chemosensitivity of cancers. MicroRNA let-7, a putative tumor suppressor, is dysregulated in many cancers. Our study aims to investigate the exact role of let-7 in chemotherapy sensitivity of 5-fluorouracil (5-FU) in RCC. METHODS The clinical significance of let-7b and let-7c expression in surgically resected specimens was assessed by qRT-PCR. Cell proliferation assay and colony formation assay were used to assess the survival of 786-O cells treated with let-7b or let-7c combined with 5-FU. Western blot was used to detect the expression of Akt2 and caspase-7. Luciferase assay was used to detect the direct binding of let-7b and let-7c to the 3'-untranslated region (UTR) of Akt2. RESULTS Expression of let-7b and let-7c was significantly decreased in 32 paired clear cell renal cell carcinoma tissue specimens and the dysregulation of let-7b was associated with pathological grade. Transfection of let-7b or let-7c combined with 5-FU inhibited proliferation and potentiated the antitumor efficacies of 5-FU at tolerated concentration. let-7b and let-7c suppressed the luciferase activity of reporter plasmid containing the 3'-UTR of Akt2. Overexpression of let-7b and let-7c reduced Akt2 expression, and Akt2 inhibition enhanced the sensitivity to 5-FU by affecting apoptotic pathway. CONCLUSIONS Expression of let-7b and let-7c was frequently decreased in clear cell renal cell carcinoma tissues. The dysregulation of let-7b and let-7c may be involved in chemoresistance of RCC cells to 5-FU by down-regulating Akt2.
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12
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Ahn JH, Yang YI, Lee KT, Choi JH. Dieckol, isolated from the edible brown algae Ecklonia cava, induces apoptosis of ovarian cancer cells and inhibits tumor xenograft growth. J Cancer Res Clin Oncol 2015; 141:255-68. [PMID: 25216701 DOI: 10.1007/s00432-014-1819-8] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Accepted: 08/28/2014] [Indexed: 12/22/2022]
Abstract
PURPOSE Ecklonia cava is an abundant brown alga and has been reported to possess various bioactive compounds having anti-inflammatory effect. However, the anticancer effects of dieckol, a major active compound in E. cava, are poorly understood. In the present study, we investigated the anti-tumor activity of dieckol and its molecular mechanism in ovarian cancer cells and in a xenograft mouse model . METHODS MTT assay, PI staining, and PI and Annexin double staining were performed to study cell cytotoxicity, cell cycle distribution, and apoptosis. We also investigated reactive oxygen species (ROS) production and protein expression using flow cytometry and Western blot analysis, respectively. Anti-tumor effects of dieckol were evaluated in SKOV3 tumor xenograft model. RESULTS We found that the E. cava extract and its phlorotannins have cytotoxic effects on A2780 and SKOV3 ovarian cancer cells. Dieckol induced the apoptosis of SKOV3 cells and suppressed tumor growth without any significant adverse effect in the SKOV3-bearing mouse model. Dieckol triggered the activation of caspase-8, caspase-9, and caspase-3, and pretreatment with caspase inhibitors neutralized the pro-apoptotic activity of dieckol. Furthermore, treatment with dieckol caused mitochondrial dysfunction and suppressed the levels of anti-apoptotic proteins. We further demonstrated that dieckol induced an increase in intracellular ROS, and the antioxidant N-acetyl-L-cysteine (NAC) significantly reversed the caspase activation, cytochrome c release, Bcl-2 downregulation, and apoptosis that were caused by dieckol. Moreover, dieckol inhibited the activity of AKT and p38, and overexpression of AKT and p38, at least in part, reversed dieckol-induced apoptosis in SKOV3 cells. CONCLUSION These data suggest that dieckol suppresses ovarian cancer cell growth by inducing caspase-dependent apoptosis via ROS production and the regulation of AKT and p38 signaling.
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Affiliation(s)
- Ji-Hye Ahn
- Department of Life and Nanopharmaceutical Science, Kyung Hee University, Seoul, Republic of Korea
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Lis R, Touboul C, Halabi NM, Madduri AS, Querleu D, Mezey J, Malek JA, Suhre K, Rafii A. Mesenchymal cell interaction with ovarian cancer cells induces a background dependent pro-metastatic transcriptomic profile. J Transl Med 2014; 12:59. [PMID: 24597747 PMCID: PMC4132214 DOI: 10.1186/1479-5876-12-59] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Accepted: 02/06/2014] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The cross talk between the stroma and cancer cells plays a major role in phenotypic modulation. During peritoneal carcinomatosis ovarian cancer cells interact with mesenchymal stem cells (MSC) resulting in increased metastatic ability. Understanding the transcriptomic changes underlying the phenotypic modulation will allow identification of key genes to target. However in the context of personalized medicine we must consider inter and intra tumoral heterogeneity. In this study we used a pathway-based approach to illustrate the role of cell line background in transcriptomic modification during a cross talk with MSC. METHODS We used two ovarian cancer cell lines as a surrogate for different ovarian cancer subtypes: OVCAR3 for an epithelial and SKOV3 for a mesenchymal subtype. We co-cultured them with MSCs. Genome wide gene expression was determined after cell sorting. Ingenuity pathway analysis was used to decipher the cell specific transcriptomic changes related to different pro-metastatic traits (Adherence, migration, invasion, proliferation and chemoresistance). RESULTS We demonstrate that co-culture of ovarian cancer cells in direct cellular contact with MSCs induces broad transcriptomic changes related to enhance metastatic ability. Genes related to cellular adhesion, invasion, migration, proliferation and chemoresistance were enriched under these experimental conditions. Network analysis of differentially expressed genes clearly shows a cell type specific pattern. CONCLUSION The contact with the mesenchymal niche increase metastatic initiation and expansion through cancer cells' transcriptome modification dependent of the cellular subtype. Personalized medicine strategy might benefit from network analysis revealing the subtype specific nodes to target to disrupt acquired pro-metastatic profile.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Arash Rafii
- Department of Genetic Medicine and Obstetrics and Gynecology, Stem cell and microenvironment laboratory, Weill Cornell Medical College in Qatar (WCMC-Q), Education City, Qatar Foundation, Qatar-Foundation PO: 24144, Doha, Qatar.
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Carduner L, Agniel R, Kellouche S, Picot CR, Blanc-Fournier C, Leroy-Dudal J, Carreiras F. Ovarian cancer ascites-derived vitronectin and fibronectin: combined purification, molecular features and effects on cell response. Biochim Biophys Acta Gen Subj 2013; 1830:4885-97. [PMID: 23811340 DOI: 10.1016/j.bbagen.2013.06.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Revised: 06/11/2013] [Accepted: 06/17/2013] [Indexed: 02/04/2023]
Abstract
BACKGROUND Intra-abdominal ascites is a complication of ovarian cancers and constitutes a permissive microenvironment for metastasis. Since fibronectin and vitronectin are key actors in ovarian cancer progression, we investigated their occurrence and molecular characteristics in various ascites fluids and the influence of these ascites-derived proteins on cell behavior. METHODS Fibronectin and vitronectin were investigated by immunoblotting within various ascites fluids. A combined affinity-based protocol was developed to purify both proteins from the same sample. Each purified protein was characterized with regard to its molecular features (molecular mass of isoforms, tryptophan intramolecular environment, hydrodynamic radii), and its influence on cell adhesion. RESULTS Fibronectin and vitronectin were found in all tested ascites. Several milligrams of purified proteins were obtained from ascites of varying initial volumes. Molecular mass isoforms and conformational lability of proteins differed according to the ascites of origin. When incorporated into the cancer cell environment, ascites-derived fibronectin and vitronectin supported cell adhesion and migration with various degrees of efficiency, and induced the recruitment of integrins into focal contacts. CONCLUSIONS To our knowledge, this is the first combined purification of two extracellular matrix proteins from a single pathological sample containing a great variety of bioactive molecules. This study highlights that ascites-derived fibronectin and vitronectin exhibit different properties depending on the ascites. GENERAL SIGNIFICANCE Investigating the relationships between the molecular properties of ascites components and ovarian cancer cell phenotype according to the ascites may be critical for a better understanding of the recurrence of this lethal disease and for further biomarker identification.
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Affiliation(s)
- Ludovic Carduner
- Institut des Matériaux, Université de Cergy-Pontoise, Cergy-Pontoise Cedex, France
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15
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A mass spectrometry-based plasma protein panel targeting the tumor microenvironment in patients with breast cancer. J Proteomics 2013; 81:135-47. [DOI: 10.1016/j.jprot.2012.11.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 11/01/2012] [Accepted: 11/04/2012] [Indexed: 01/19/2023]
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Elevated levels of Lewis y and integrin α5β1 correlate with chemotherapeutic drug resistance in epithelial ovarian carcinoma. Int J Mol Sci 2012; 13:15588-600. [PMID: 23443083 PMCID: PMC3546651 DOI: 10.3390/ijms131215588] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Revised: 11/09/2012] [Accepted: 11/12/2012] [Indexed: 01/09/2023] Open
Abstract
Objective To measure Lewis y and integrin α5β1 expression in epithelial ovarian carcinoma and to correlate the levels of these molecules with ovarian carcinoma chemotherapy and prognosis. Methods The study population included 34 ovarian carcinoma patients with chemotherapeutic drug-resistance, six partially drug-sensitive cases, and 52 drug-sensitive cases (92 total). Immunochemistry was used to determine expression of Lewis y antigen and integrin α5β1 in ovarian carcinoma tissues, and correlation of these molecules with chemotherapy resistance was further investigated, Multi-factor logistic regression analysis was applied to investigate: age, surgical stage, grade, subtype of patient cases, metastasis of lymph nodes, residual tumor size, expression levels of Lewis y antigen and integrin α5β1 correlation with ovarian carcinoma chemotherapy resistance. Results The expression rates of Lewis y antigen and integrins α5 and β1 were significantly greater in the drug-resistant group (91.17%, 85.29%, 88.24%) than the partially sensitive (50.00%, 33.33%, 50.00%) or sensitive groups (61.54%, 57.69%, 55.77%). Binary logistic regression analysis revealed that surgical stage, residual tumor size, and expression of integrin α5 and Lewis y in ovarian carcinoma tissues were independent risk factors for chemotherapeutic drug resistance. Conclusions Overexpression of Lewis y and integrin α5 are strong risk factors for chemotherapeutic drug resistance in ovarian carcinoma patients.
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17
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Miao X, Song Y, Lv T, Zhan P, Lv Y, Yuan D. [Expression and prognostic value of AKT2 in non-small cell lung cancer]. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2011; 14:396-9. [PMID: 21569643 PMCID: PMC6000327 DOI: 10.3779/j.issn.1009-3419.2011.05.03] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND AND OBJECTIVE AKT2 is a critical actor in the PI3K signal transduction pathway. Activation of AKT2 can lead to cell growth and survival. It has been revealed that AKT2 play a central role in tumorigenesis, tumor growth as well as metastasis. The aim of this study is to investigate the association between AKT2 and the clinical outcome of non-small cell lung cancer (NSCLC) patients by detecting its expression levels in the tumor tissue samples. METHODS We developed an immunohistochemistry (IHC) assay to measure AKT2 protein levels in lung specimens from 80 cases with NSCLC and 10 cases with benign pulmonary disease. RESULTS The positive rate of AKT2 was 57.50% (46/80) in NSCLC, which was higher than that in benign pulmonary (10.0%) samples (Chi-square=8.038, P=0.006). There was no significant correlation between AKT2 expression and the clinicopathologic profiles. The expression of AKT2 was significantly correlated with the progression free survival (PFS) (Chi-square=12.671, P=0.005) and the overall survival (OS) (Chi-square=9.851, P=0.021) of patients with NSCLC. CONCLUSION AKT2 may provide a prognostic bio-marker of NSCLC.
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Affiliation(s)
- Xiaohui Miao
- Department of Respiratory Medicine, Jinling Hospital, Nanjing University School of Medicine, Nanjing 210002, China
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18
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De Souza R, Zahedi P, Badame RM, Allen C, Piquette-Miller M. Chemotherapy dosing schedule influences drug resistance development in ovarian cancer. Mol Cancer Ther 2011; 10:1289-99. [PMID: 21551263 DOI: 10.1158/1535-7163.mct-11-0058] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Drug resistance leads to chemotherapy failure and is responsible for the death of a great majority of patients with metastatic, late-stage ovarian cancer. The present study addressed whether changes in the chemotherapy dosing schedule affect the development, further worsening, or circumvention of drug resistance in chemosensitive and chemoresistant ovarian cancer. Severe combined immunodeficient mice bearing HeyA8 and HeyA8-MDR xenografts were treated with docetaxel intermittently (1×/wk or 3×/wk) or continuously for 21 days. Tumor mRNA expression of genes implicated in docetaxel resistance was measured by quantitative real-time-PCR. Analyzed genes included those encoding for the drug efflux transporters mdr1 and mrp7 and for molecules that interfere with or overcome the effects of docetaxel, including β-tubulinIII, actinin4, stathmin1, bcl2, rpn2, thoredoxin, and akt2. In both models, continuous docetaxel resulted in greater antitumor efficacy than 1×/wk or 3×/wk dosing and did not induce upregulation of any analyzed genes. Once weekly dosing caused upregulation of various drug resistance-related genes, especially in chemoresistant xenografts. More frequent, 3×/wk dosing diminished this effect, although levels of various genes were higher than for continuous chemotherapy. Drug efflux transporter expression was further examined by Western blotting, confirming that intermittent, but not continuous, docetaxel induced significant upregulation. Overall, our results show that the presence and length of treatment-free intervals contribute to the development of drug resistance. Elimination of these intervals by continuous dosing resulted in superior antitumor efficacy and prevented drug resistance induction in chemosensitive and chemoresistant disease. These results encourage the clinical implementation of continuous chemotherapy to overcome and/or prevent drug resistance in newly diagnosed and recurrent, refractory ovarian cancer.
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Affiliation(s)
- Raquel De Souza
- Department of Pharmaceutical Sciences, University of Toronto, 144 College Street, Toronto, Ontario, Canada M5S 3M2
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Pang H, Cai L, Yang Y, Chen X, Sui G, Zhao C. Knockdown of Osteopontin Chemosensitizes MDA-MB-231 Cells to Cyclophosphamide by Enhancing Apoptosis Through Activating p38 MAPK Pathway. Cancer Biother Radiopharm 2011; 26:165-73. [PMID: 21539449 DOI: 10.1089/cbr.2010.0838] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Hui Pang
- Department of Oncology Medicine, The Third Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Li Cai
- Department of Oncology Medicine, The Third Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Yanmei Yang
- Cancer Research Institute of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Xuesong Chen
- Department of Oncology Medicine, The Third Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Guangjie Sui
- Department of Oncology Medicine, The Third Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
| | - Changhong Zhao
- Department of Oncology Medicine, The Third Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang Province, China
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Cheong JW, Jung HI, Eom JI, Kim SJ, Jeung HK, Min YH. Aurora-A kinase inhibition enhances the cytosine arabinoside-induced cell death in leukemia cells through apoptosis and mitotic catastrophe. Cancer Lett 2010; 297:171-81. [PMID: 20547440 DOI: 10.1016/j.canlet.2010.05.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Revised: 03/14/2010] [Accepted: 05/18/2010] [Indexed: 01/05/2023]
Abstract
Aurora-A (Aur-A) is a centrosome-associated serine/threonine kinase that is overexpressed in various cancers and potentially correlated with chemoresistance. In the Ara-C-sensitive leukemia cell lines, silencing of Aur-A by small interfering RNA transfection led to a significant increase in the Ara-C-induced cell death rate through induction of mitochondria-mediated, caspase-dependent apoptosis. In contrast, combined treatment of the Ara-C-resistant leukemia cell lines with Aur-A siRNA and Ara-C remarkably enhanced the cell death rate via non-caspase-dependent mitotic catastrophe. Taken together, Aur-A inhibition was an effective treatment for both the Ara-C-sensitive and resistant leukemia cells by increasing apoptosis and mitotic catastrophe, respectively.
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Affiliation(s)
- June-Won Cheong
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Republic of Korea
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Lou X, Zhou Q, Yin Y, Zhou C, Shen Y. Inhibition of the met receptor tyrosine kinase signaling enhances the chemosensitivity of glioma cell lines to CDDP through activation of p38 MAPK pathway. Mol Cancer Ther 2009; 8:1126-36. [PMID: 19435873 DOI: 10.1158/1535-7163.mct-08-0904] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The Met receptor tyrosine kinase is known to be overexpressed in many solid tumors and plays a crucial role in tumor invasive growth and metastasis. In this study, we showed that hepatocyte growth factor-induced Met activation as well as Met-dependent downstream signaling of AKT and p44/42 mitogen-activated protein kinase (MAPK) could be efficiently blocked by TAT-coupled carboxyl-terminal tail peptide of Met receptor (TCTP), and inactivation of Met signaling significantly enhanced the sensitivity of T98G and U251 glioma cells to cis-diaminedichloroplatinum (CDDP, cisplatin). However, neither phosphoinositide 3-kinase/AKT inhibitor LY294002 nor p44/42 MAPK inhibitor PD98059 alone or combined could imitate the effect of TCTP on chemosensitivity enhancement of T98G cells to CDDP, indicating that Met-dependent inactivation of AKT and p44/42 MAPK signaling was not the main cause for the increased chemosensitivity to CDDP. Further studies revealed that TCTP significantly activated p38 MAPK in T98G and U251 cell lines. Activation of p38 MAPK by sorbitol pretreatment resembled the sensitization effects, whereas inhibition of p38 MAPK activation by its inhibitor SB202190 counteracted the sensitization effects induced by TCTP. Therefore, p38 MAPK activation was one of the major causes for the increased chemosensitivity to CDDP induced by Met inactivation. Taken together, the study indicated that Met receptor played an important role in regulating cell response to chemotherapy and suggested that inhibition of Met signaling could be used in combination with other chemotherapeutic regimens in treatment of tumor patients.
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Affiliation(s)
- Xiuqin Lou
- National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Tsinghua University, Beijing, People's Republic of China
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22
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He S, Zhang D, Cheng F, Gong F, Guo Y. Applications of RNA interference in cancer therapeutics as a powerful tool for suppressing gene expression. Mol Biol Rep 2009; 36:2153-63. [PMID: 19117119 DOI: 10.1007/s11033-008-9429-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2008] [Accepted: 12/08/2008] [Indexed: 01/07/2023]
Abstract
Cancer poses a tremendous therapeutic challenge worldwide, highlighting the critical need for developing novel therapeutics. A promising cancer treatment modality is gene therapy, which is a form of molecular medicine designed to introduce into target cells genetic material with therapeutic intent. The history of RNA interference (RNAi) has only a dozen years, however, further studies have revealed that it is a potent method of gene silencing that has developed rapidly over the past few years as a result of its extensive importance in the study of genetics, molecular biology and physiology. RNAi is a natural process by which small interfering RNA (siRNA) duplex directs sequence specific post-transcriptional silencing of homologous genes by binding to its complementary mRNA and triggering its elimination. RNAi has been extensively used as a novel and effective gene silencing tool for the fundamental research of cancer therapeutics, and has displayed great potential in clinical treatment.
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Affiliation(s)
- Song He
- Molecular Medicine & Tumor Research Center, Chongqing Medical University, Chongqing, China.
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Weng D, Song X, Xing H, Ma X, Xia X, Weng Y, Zhou J, Xu G, Meng L, Zhu T, Wang S, Ma D. Implication of the Akt2/survivin pathway as a critical target in paclitaxel treatment in human ovarian cancer cells. Cancer Lett 2008; 273:257-65. [PMID: 18842333 DOI: 10.1016/j.canlet.2008.08.027] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2008] [Revised: 06/05/2008] [Accepted: 08/07/2008] [Indexed: 01/03/2023]
Abstract
PURPOSE Although multiple mechanisms have been implicated in paclitaxel (PTX)-induced resistance in ovarian cancer, recent evidence has suggested that Akt2 has an important role in the protection of cells from paclitaxel-induced apoptosis. In the present study, we investigated the role of the Akt2/survivin pathway in paclitaxel-induced resistance by a modified method to generate an effective shRNA vector. METHODS We applied RNAi-mediated silencing techniques to investigate the mechanism of the Akt2/survivin pathway on PTX-induced resistance in ovarian cancer cells (A2780 and SKOV3). The expression of Akt2 and survivin mRNA and related protein levels were evaluated with semiquantitative real-time RT-PCR and western blot analysis, respectively. Inhibition of cell proliferation was determined by 3-[4, 5-dimethylthiazol-2-yl]-2, 5-diphenyltetrazolium bromide (MTT) assay, and the induction of apoptosis was examined through flow cytometry (FACS) and Hoechst staining. RESULTS Akt2 down-regulation sensitized ovarian cancer cells to paclitaxel-induced apoptosis, and inhibited survivin expression. We further demonstrated that suppressing the inhibition of survivin expression can induce the drug-resistance to paclitaxel. We introduced a modified vector to generate shRNA to induce RNA interference, which contained three U6 promoters to express different shRNAs; it severely reduced Akt2 gene expression and showed good specificity. CONCLUSION Our findings will aid in understanding the molecular mechanism of paclitaxel-induced resistance in ovarian cancer and facilitate the development of novel anti-neoplastic strategies.
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Affiliation(s)
- Danhui Weng
- Cancer Biology Research Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, PR China
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