51
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Wei ZT, Yu XW, He JX, Liu Y, Zhang SL. Characteristics of primary side population cervical cancer cells. Oncol Lett 2017; 14:3536-3544. [PMID: 28927110 PMCID: PMC5588017 DOI: 10.3892/ol.2017.6606] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 03/09/2017] [Indexed: 01/12/2023] Open
Abstract
The aim of the present study was to identify and characterize side population (SP) cells in primary cervical cancer. A primary culture was successfully established, and the SP cells were isolated via fluorescence-activated cell sorting. Subsequently, in vitro analysis of clonogenic capacity by soft agar assay and in vivo analysis of tumorigenicity were performed. The isolated SP cells accounted for ~4.73% of the total primary culture cells. The SP cells had a decreased proliferation rate and an increased distribution in G0/G1 compared with non-SP (NSP) cells. Following isolation, SP cells exhibited increased proliferative and self-renewal potency compared with NSP cells. Furthermore, significant ATP binding cassette subfamily G member 2 (ABCG2) expression was detected in SP cells but not in NSP cells. The tumor formation rate of SP cells was longer, and the tumor size and tumor formation rate of SP cells were increased in non-obese diabetic/severe combined immunodeficiency mice. In conclusion, the present study demonstrated that SP cells can be isolated from primary cervical cancer cell culture, and SP cells are enriched with stem cell-like cells that have a high capacity for colony formation and tumorigenesis.
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Affiliation(s)
- Zhen-Tong Wei
- Department of Gynecological Oncology, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Xiao-Wei Yu
- Prenatal Diagnosis Center, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Jia-Xue He
- Genetic Diagnosis Center, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
| | - Yan Liu
- Genetic Engineering Laboratory of The Chinese People's Liberation Army, Military Veterinary Institute, Acadamy of Military Medical Sciences, Changchun, Jilin 130122, P.R. China
| | - Song-Ling Zhang
- Department of Gynecological Oncology, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
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52
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Teodori E, Dei S, Bartolucci G, Perrone MG, Manetti D, Romanelli MN, Contino M, Colabufo NA. Structure-Activity Relationship Studies on 6,7-Dimethoxy-2-phenethyl-1,2,3,4-tetrahydroisoquinoline Derivatives as Multidrug Resistance Reversers. ChemMedChem 2017; 12:1369-1379. [DOI: 10.1002/cmdc.201700239] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 06/01/2017] [Indexed: 01/30/2023]
Affiliation(s)
- Elisabetta Teodori
- Dipartimento NEUROFARBA-Sezione di Farmaceutica e Nutraceutica; Università di Firenze; via Ugo Schiff 6 50019 Sesto Fiorentino FI Italy
| | - Silvia Dei
- Dipartimento NEUROFARBA-Sezione di Farmaceutica e Nutraceutica; Università di Firenze; via Ugo Schiff 6 50019 Sesto Fiorentino FI Italy
| | - Gianluca Bartolucci
- Dipartimento NEUROFARBA-Sezione di Farmaceutica e Nutraceutica; Università di Firenze; via Ugo Schiff 6 50019 Sesto Fiorentino FI Italy
| | - Maria Grazia Perrone
- Dipartimento di Farmacia-Scienze del Farmaco; Università degli Studi di Bari “A. Moro”; via Orabona 4 70125 Bari Italy
| | - Dina Manetti
- Dipartimento NEUROFARBA-Sezione di Farmaceutica e Nutraceutica; Università di Firenze; via Ugo Schiff 6 50019 Sesto Fiorentino FI Italy
| | - Maria Novella Romanelli
- Dipartimento NEUROFARBA-Sezione di Farmaceutica e Nutraceutica; Università di Firenze; via Ugo Schiff 6 50019 Sesto Fiorentino FI Italy
| | - Marialessandra Contino
- Dipartimento di Farmacia-Scienze del Farmaco; Università degli Studi di Bari “A. Moro”; via Orabona 4 70125 Bari Italy
| | - Nicola Antonio Colabufo
- Dipartimento di Farmacia-Scienze del Farmaco; Università degli Studi di Bari “A. Moro”; via Orabona 4 70125 Bari Italy
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53
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Mi Y, He M, Liu B. [MiR-133b Affect the Proliferation and Drug Sensitivity in A549 Lung Cancer Stem Cells by Targeting PKM2]. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2017. [PMID: 28641694 PMCID: PMC5973364 DOI: 10.3779/j.issn.1009-3419.2017.06.02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND It has been proven that miR-133b could inhibit cancer cell growth, the expression level of miR-133b was significant reduction in lung cancer tissue and serum of patients, and increase the radiation sensitivity of squamous cell carcinoma by targeting PKM2, but the exist mechanisms is not clear. The aim of this study is to explore the effect of miR-133b on proliferation in A549 lung cancer stem cells and drug sensitivity in DDP, and to explore the relationship between miR-133b and PKM2 gene, as well as the effect of cancer stem cells. METHODS Using miRBase and miRNAMap database to sequence comparison miR-133b and PKM2 gene. Using immune magnetic separation method to select the CD133+/CD34+ lung cancer stem cells from A549 cells, and using flow cytometry to detect the purity. The expression of miR-133b mRNA was detected by real-time fluorescence quantitative PCR (qRT-PCR). Cell proliferation was detected by CCK8 assay. 15 μg/mL DDP was treated to cells which was transfected with miR-133b, and apoptosis was detected by flow Cytometry at 0 h, 12 h, 24 h, 72 h. The expression of PKM2 protein was detected by Western blot. RESULTS Gene binding site report that PKM2 gene may be the target gene of miR-133b; the results of flow cytometry showed that the purity of CD133+/CD34+ stem cells was (92.15±4.27)%. qRT-PCR results showed that compared with the control group, after overexpression of miR-133b, miR-133b was up-regulated and miR-133b was down regulated after miR-133b inhibition (P<0.05). Compared with the control group, cell proliferation of miR-133b mimics group was significantly decreased (P<0.05), PKM2 protein levels were significantly lower (P<0.05); and cell proliferation of the miR-133b inhibitor group and PKM2 level was increased (P<0.05). The apoptosis of miR-133b mimics group was significantly higher than that of control group (P<0.05) after DDP treatment with 12 h. The expression of PKM2 protein in miR-133b mimics+DDP group was significantly lower than that in control group (P<0.05). CONCLUSIONS Overexpression of miR-133b can inhibit the growth and proliferation of lung cancer stem cells by down regulating PKM2, and can enhance the sensitivity of lung cancer stem cells to DDP.
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Affiliation(s)
- Yonghua Mi
- Department of Laboratory, Yongchuan Affiliated Hospital Chongqing Medical University, Chongqing 402160, China
| | - Miao He
- Respiratory Medicine, Xindu District People's Hospital of Chengdu, Chengdu 610500, China
| | - Beizhong Liu
- Department of Laboratory, Yongchuan Affiliated Hospital Chongqing Medical University, Chongqing 402160, China
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54
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Zhang S, Jia Z, Ge J, Gong L, Ma Y, Li T, Guo J, Chen P, Hu Q, Zhang P, Liu Y, Li Z, Ma K, Li L, Zhou C. Purified Human Bone Marrow Multipotent Mesenchymal Stem Cells Regenerate Infarcted Myocardium in Experimental Rats. Cell Transplant 2017; 14:787-98. [PMID: 16454353 DOI: 10.3727/000000005783982558] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Recent findings suggest the feasibility of cardiac repair by transplantation of bone marrow mesenchymal stem cell (MSCs). However, it remains controversial regarding which cell type is the best source for transplanting into the ischemic heart because of lack of well-defined cell markers. In this study, we investigated the in vitro and in vivo effects of the novel multipotent marrow mesenchymal stem cells (MMSCs) from human bone marrow. Pluripotent markers (Oct4, Bmi1, and Abcg2) and vascular endothelial growth factor (VEGF) were detected by RT-PCR and immunofluorescence in MMSCs. Myocardial differentiation was induced in the expanded MMSC cultures by treatment with 5-azacyline. Expressions of VEGF in the animals transplanted with MMSCs were markedly increased in comparison with the animals injected with fibroblasts or saline at both mRNA and protein levels. VEGF expression was observed in both transplanted MMSCs and recipient cardiomyocytes by immunofluorescence. Confocal immunofluorescence microscopy revealed the specific markers for cardiomyocytes and endothelial cells in transplanted MMSCs 14 days after transplantation. Vessel count was increased and left ventricular function improved post-MMSC transplantation. These results indicate that transplantation of purified MMSCs from human bone marrow upregulated VEGF expression, enhanced angiogenesis, and improved the functional recovery following myocardial infarction in rats.
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Affiliation(s)
- Shaoheng Zhang
- Stem Cell Research Center, Peking University, Hai Dian District, Beijing, China
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Lee YH, Yang HW, Yang LC, Lu MY, Tsai LL, Yang SF, Huang YF, Chou MY, Yu CC, Hu FW. DHFR and MDR1 upregulation is associated with chemoresistance in osteosarcoma stem-like cells. Oncol Lett 2017; 14:171-179. [PMID: 28693150 PMCID: PMC5494897 DOI: 10.3892/ol.2017.6132] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Accepted: 07/01/2016] [Indexed: 01/08/2023] Open
Abstract
Tumor-initiating cells (TICs) are defined as a specialized subset of cells with tumor-initiating capacity that can initiate tumor growth, tumor relapse and metastasis. In the present study, osteosarcoma TICs (OS-TICs) were isolated and enriched from the osteosarcoma U2OS and MG-63 cell lines using sphere formation assays and serum-depleted media. These enriched OS-TICs showed the expression of several typical cancer stemness markers, including octamer-binding transcription factor 4, Nanog homeobox, cluster of differentiation (CD)117, Nestin and CD133, and the expression of ATP binding cassette subfamily G member 2, multidrug resistance protein 1 (MDR1) and dihydrofolate reductase (DHFR). Notably, in vitro and in vivo tumorigenic properties were enhanced in these OS-TICs. Additionally, methotrexate and doxorubicin are the most widely used anticancer agents against osteosarcoma, and the observed enhanced chemoresistance of OS-TICs to these two agents could be associated with the upregulation of DHFR and MDR1. These findings suggest that the upregulation of DHFR and MDR1 is associated with the development of chemoresistance of OS-TICs.
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Affiliation(s)
- Yu-Hsien Lee
- School of Dentistry, Chung Shan Medical University, Taichung 40201, Taiwan, R.O.C.,Department of Dentistry, Chung Shan Medical University Hospital, Taichung 40201, Taiwan, R.O.C
| | - Hui-Wen Yang
- School of Dentistry, Chung Shan Medical University, Taichung 40201, Taiwan, R.O.C.,Department of Dentistry, Chung Shan Medical University Hospital, Taichung 40201, Taiwan, R.O.C
| | - Li-Chiu Yang
- School of Dentistry, Chung Shan Medical University, Taichung 40201, Taiwan, R.O.C.,Department of Dentistry, Chung Shan Medical University Hospital, Taichung 40201, Taiwan, R.O.C
| | - Ming-Yi Lu
- School of Dentistry, Chung Shan Medical University, Taichung 40201, Taiwan, R.O.C.,Department of Dentistry, Chung Shan Medical University Hospital, Taichung 40201, Taiwan, R.O.C
| | - Lo-Lin Tsai
- School of Dentistry, Chung Shan Medical University, Taichung 40201, Taiwan, R.O.C.,Department of Dentistry, Chung Shan Medical University Hospital, Taichung 40201, Taiwan, R.O.C
| | - Shun-Fa Yang
- Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan, R.O.C
| | - Yu-Feng Huang
- School of Dentistry, Chung Shan Medical University, Taichung 40201, Taiwan, R.O.C.,Department of Dentistry, Chung Shan Medical University Hospital, Taichung 40201, Taiwan, R.O.C
| | - Ming-Yung Chou
- School of Dentistry, Chung Shan Medical University, Taichung 40201, Taiwan, R.O.C.,Department of Dentistry, Chung Shan Medical University Hospital, Taichung 40201, Taiwan, R.O.C.,Institute of Oral Sciences, Chung Shan Medical University, Taichung 40201, Taiwan, R.O.C
| | - Cheng-Chia Yu
- School of Dentistry, Chung Shan Medical University, Taichung 40201, Taiwan, R.O.C.,Department of Dentistry, Chung Shan Medical University Hospital, Taichung 40201, Taiwan, R.O.C.,Institute of Oral Sciences, Chung Shan Medical University, Taichung 40201, Taiwan, R.O.C
| | - Fang-Wei Hu
- School of Dentistry, Chung Shan Medical University, Taichung 40201, Taiwan, R.O.C.,Department of Dentistry, Chung Shan Medical University Hospital, Taichung 40201, Taiwan, R.O.C
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Gruber W, Scheidt T, Aberger F, Huber CG. Understanding cell signaling in cancer stem cells for targeted therapy - can phosphoproteomics help to reveal the secrets? Cell Commun Signal 2017; 15:12. [PMID: 28356110 PMCID: PMC5372284 DOI: 10.1186/s12964-017-0166-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 03/13/2017] [Indexed: 12/11/2022] Open
Abstract
Background Cancer represents heterogeneous and aberrantly proliferative manifestations composed of (epi)genetically and phenotypically distinct cells with a common clonal origin. Cancer stem cells (CSC) make up a rare subpopulation with the remarkable capacity to initiate, propagate and spread a malignant disease. Furthermore, CSC show increased therapy resistance, thereby contributing to disease relapse. Elimination of CSC, therefore, is a crucial aim to design efficacious treatments for long-term survival of cancer patients. In this article, we highlight the nature of CSC and propose that phosphoproteomics based on unbiased high-performance liquid chromatography-mass spectrometry provides a powerful tool to decipher the molecular CSC programs. Detailed knowledge about the regulation of signaling processes in CSC is a prerequisite for the development of patient-tailored multi-modal treatments including the elimination of rare CSC. Main body Phosphorylation is a crucial post-translational modification regulating a plethora of both intra- and intercellular communication processes in normal and malignant cells. Small-molecule targeting of kinases has proven successful in the therapy, but the high rates of relapse and failure to stem malignant spread suggest that these kinase inhibitors largely spare CSC. Studying the kinetics of global phosphorylation patterns in an unbiased manner is, therefore, required to improve strategies and successful treatments within multi-modal therapeutic regimens by targeting the malignant behavior of CSC. The phosphoproteome comprises all phosphoproteins within a cell population that can be analyzed by phosphoproteomics, allowing the investigation of thousands of phosphorylation events. One major aspect is the perception of events underlying the activation and deactivation of kinases and phosphatases in oncogenic signaling pathways. Thus, not only can this tool be harnessed to better understand cellular processes such as those controlling CSC, but also applied to identify novel drug targets for targeted anti-CSC therapy. Conclusion State-of-the-art phosphoproteomics approaches focusing on single cell analysis have the potential to better understand oncogenic signaling in heterogeneous cell populations including rare, yet highly malignant CSC. By eliminating the influence of heterogeneity of populations, single-cell studies will reveal novel insights also into the inter- and intratumoral communication processes controlling malignant CSC and disease progression, laying the basis for improved rational combination treatments.
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Affiliation(s)
- Wolfgang Gruber
- Department of Molecular Biology, Cancer Cluster Salzburg, Paris-Lodron University of Salzburg, Hellbrunner Strasse 34, 5020, Salzburg, Austria
| | - Tamara Scheidt
- Department of Molecular Biology, Cancer Cluster Salzburg, Paris-Lodron University of Salzburg, Hellbrunner Strasse 34, 5020, Salzburg, Austria
| | - Fritz Aberger
- Department of Molecular Biology, Cancer Cluster Salzburg, Paris-Lodron University of Salzburg, Hellbrunner Strasse 34, 5020, Salzburg, Austria.
| | - Christian G Huber
- Department of Molecular Biology, Cancer Cluster Salzburg, Paris-Lodron University of Salzburg, Hellbrunner Strasse 34, 5020, Salzburg, Austria.
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57
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Mehrotra S, Gopalakrishnan M, Gobburu J, Greer JM, Piekarz R, Karp JE, Pratz K, Rudek MA. Population pharmacokinetics and site of action exposures of veliparib with topotecan plus carboplatin in patients with haematological malignancies. Br J Clin Pharmacol 2017; 83:1688-1700. [PMID: 28156017 DOI: 10.1111/bcp.13253] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 01/18/2017] [Accepted: 01/30/2017] [Indexed: 11/28/2022] Open
Abstract
AIMS Veliparib is a potent inhibitor of poly(ADP-ribose) polymerase (PARP) enzyme. The objectives of the analysis were to evaluate the effect of baseline covariates and co-administration of topotecan plus carboplatin (T + C) on pharmacokinetics of veliparib in patients with refractory acute leukaemia, and compare veliparib concentration in various biological matrices. METHODS A population pharmacokinetic model was developed and effect of age, body size indices, sex, creatinine clearance (CrCL) and co-administration of T + C on the pharmacokinetics of veliparib were evaluated. The final model was qualified using bootstrap and quantitative predictive check. Linear regression was conducted to correlate concentrations of veliparib in various biological matrices. RESULTS A two compartment model with first-order absorption with Tlag described veliparib pharmacokinetics. The apparent clearance (CL/F) and volume (Vc /F) were 16.5 l h-1 and 122.7 l, respectively. The concomitant administration of T + C was not found to affect veliparib CL/F. CrCL and lean body mass (LBM) were significant covariates on CL/F and Vc/F, respectively. While a strong positive relationship was observed between veliparib concentrations in plasma and bone marrow supernatant, no correlation was observed between plasma and peripheral blood or bone marrow blasts. CONCLUSIONS Consistent with veliparib's physiochemical properties and its elimination mechanism, LBM and CrCL were found to affect pharmacokinetics of veliparib while concomitant administration of T + C did not affect veliparib's CL/F. Plasma concentrations were found to be a reasonable surrogate for veliparib concentrations in peripheral blood and bone marrow supernatant but not blasts. The current model will be utilized to conduct exposure-response analysis to support dosing recommendations.
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Affiliation(s)
- Shailly Mehrotra
- Center for Translational Medicine, University of Maryland, Baltimore, Maryland
| | | | - Jogarao Gobburu
- Center for Translational Medicine, University of Maryland, Baltimore, Maryland
| | - Jacqueline M Greer
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland
| | - Richard Piekarz
- Investigational Drug Branch, Cancer Therapy Evaluation Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, Bethesda, Maryland
| | - Judith E Karp
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland.,Department of Oncology, Johns Hopkins University, Baltimore, Maryland
| | - Keith Pratz
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland.,Department of Oncology, Johns Hopkins University, Baltimore, Maryland
| | - Michelle A Rudek
- The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland.,Department of Oncology, Johns Hopkins University, Baltimore, Maryland.,Department of Medicine, Division of Clinical Pharmacology, Johns Hopkins University, Baltimore, Maryland
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58
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Krawczenko A, Bielawska-Pohl A, Wojtowicz K, Jura R, Paprocka M, Wojdat E, Kozłowska U, Klimczak A, Grillon C, Kieda C, Duś D. Expression and activity of multidrug resistance proteins in mature endothelial cells and their precursors: A challenging correlation. PLoS One 2017; 12:e0172371. [PMID: 28212450 PMCID: PMC5315393 DOI: 10.1371/journal.pone.0172371] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 02/03/2017] [Indexed: 01/30/2023] Open
Abstract
Active cellular transporters of harmful agents-multidrug resistance (mdr) proteins-are present in tumor, stem and endothelial cells, among others. While mdr proteins are broadly studied in tumor cells, their role in non-tumor cells and the significance of their action not connected with removal of harmful xenobiotics is less extensively documented. Proper assessment of mdr proteins expression is difficult. Mdr mRNA presence is most often evaluated but that does not necessarily correlate with the protein level. The protein expression itself is difficult to determine; usually cells with mdr overexpression are studied, not cells under physiological conditions, in which a low expression level of mdr protein is often insufficient for detection in vitro. Various methods are used to identify mdr mRNA and protein expression, together with functional tests demonstrating their biological drug transporting activities. Data comparing different methods of investigating expression of mdr mRNAs and their corresponding proteins are still scarce. In this article we present the results of a study concerning mdr mRNA and protein expression. Our goal was to search for the best method to investigate the expression level and functional activity of five selected mdr proteins-MDR1, BCRP, MRP1, MRP4 and MRP5-in established in vitro cell lines of human endothelial cells (ECs) and their progenitors. Endothelial cells demonstrated mdr presence at the mRNA level, which was not always confirmed at the protein level or in functional tests. Therefore, several different assays had to be applied for evaluation of mdr proteins expression and functions in endothelial cells. Among them functional tests seemed to be the most conclusive, although not very specific.
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Affiliation(s)
- Agnieszka Krawczenko
- Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Aleksandra Bielawska-Pohl
- Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Karolina Wojtowicz
- Department of Histology and Embryology, Poznan University of Medical Sciences, Poznan, Poland
| | | | - Maria Paprocka
- Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Elżbieta Wojdat
- Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Urszula Kozłowska
- Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Aleksandra Klimczak
- Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
| | - Catherine Grillon
- Cellular Microenvironment and Pharmacological Targets, Centre de Biophysique Moléculaire, CNRS UPR 4301, Orléans, France
| | - Claudine Kieda
- Cellular Microenvironment and Pharmacological Targets, Centre de Biophysique Moléculaire, CNRS UPR 4301, Orléans, France
| | - Danuta Duś
- Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
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59
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Anreddy N, Patel A, Zhang YK, Wang YJ, Shukla S, Kathawala RJ, Kumar P, Gupta P, Ambudkar SV, Wurpel JND, Chen ZS, Guo H. A-803467, a tetrodotoxin-resistant sodium channel blocker, modulates ABCG2-mediated MDR in vitro and in vivo. Oncotarget 2016; 6:39276-91. [PMID: 26515463 PMCID: PMC4770772 DOI: 10.18632/oncotarget.5747] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 10/09/2015] [Indexed: 11/25/2022] Open
Abstract
ATP-binding cassette subfamily G member 2 (ABCG2) is a member of the ABC transporter superfamily proteins, which has been implicated in the development of multidrug resistance (MDR) in cancer, apart from its physiological role to remove toxic substances out of the cells. The diverse range of substrates of ABCG2 includes many antineoplastic agents such as topotecan, doxorubicin and mitoxantrone. ABCG2 expression has been reported to be significantly increased in some solid tumors and hematologic malignancies, correlated to poor clinical outcomes. In addition, ABCG2 expression is a distinguishing feature of cancer stem cells, whereby this membrane transporter facilitates resistance to the chemotherapeutic drugs. To enhance the chemosensitivity of cancer cells, attention has been focused on MDR modulators. In this study, we investigated the effect of a tetrodotoxin-resistant sodium channel blocker, A-803467 on ABCG2-overexpressing drug selected and transfected cell lines. We found that at non-toxic concentrations, A-803467 could significantly increase the cellular sensitivity to ABCG2 substrates in drug-resistant cells overexpressing either wild-type or mutant ABCG2. Mechanistic studies demonstrated that A-803467 (7.5 μM) significantly increased the intracellular accumulation of [3H]-mitoxantrone by inhibiting the transport activity of ABCG2, without altering its expression levels. In addition, A-803467 stimulated the ATPase activity in membranes overexpressed with ABCG2. In a murine model system, combination treatment of A-803467 (35 mg/kg) and topotecan (3 mg/kg) significantly inhibited the tumor growth in mice xenografted with ABCG2-overexpressing cancer cells. Our findings indicate that a combination of A-803467 and ABCG2 substrates may potentially be a novel therapeutic treatment in ABCG2-positive drug resistant cancers.
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Affiliation(s)
- Nagaraju Anreddy
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA
| | - Atish Patel
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA
| | - Yun-Kai Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA
| | - Yi-Jun Wang
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA
| | - Suneet Shukla
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Rishil J Kathawala
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA
| | - Priyank Kumar
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA
| | - Pranav Gupta
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA
| | - Suresh V Ambudkar
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - John N D Wurpel
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA
| | - Zhe-Sheng Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY 11439, USA
| | - Huiqin Guo
- Department of Thoracic Surgery, Peking Union Medical College Hospital, Beijing 100730, P.R. China
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Savage P. Chemotherapy curable malignancies and cancer stem cells: a biological review and hypothesis. BMC Cancer 2016; 16:906. [PMID: 27871274 PMCID: PMC5117562 DOI: 10.1186/s12885-016-2956-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 11/15/2016] [Indexed: 12/14/2022] Open
Abstract
Background Cytotoxic chemotherapy brings routine cures to only a small select group of metastatic malignancies comprising gestational trophoblast tumours, germ cell tumours, acute leukemia, Hodgkin’s disease, high grade lymphomas and some of the rare childhood malignancies. We have previously postulated that the extreme sensitivity to chemotherapy for these malignancies is linked to the on-going high levels of apoptotic sensitivity that is naturally linked with the unique genetic events of nuclear fusion, meiosis, VDJ recombination, somatic hypermutation, and gastrulation that have occurred within the cells of origin of these malignancies. In this review we will examine the cancer stem cell/cancer cell relationship of each of the chemotherapy curable malignancies and how this relationship impacts on the resultant biology and pro-apoptotic sensitivity of the varying cancer cell types. Discussion In contrast to the common epithelial cancers, in each of the chemotherapy curable malignancies there are no conventional hierarchical cancer stem cells. However cells with cancer stem like qualities can arise stochastically from within the general tumour cell population. These stochastic stem cells acquire a degree of resistance to DNA damaging agents but also retain much of the key characteristics of the cancer cells from which they develop. We would argue that the balance between the acquired resistance of the stochastic cancer stem cell and the inherent chemotherapy sensitivity of parent tumour cell determines the overall chemotherapy curability of each diagnosis. Summary The cancer stem cells in the chemotherapy curable malignancies appear to have two key biological differences from those of the more common chemotherapy incurable malignancies. The first difference is that the conventional hierarchical pattern of cancer stem cells is absent in each of the chemotherapy curable malignancies. The other key difference, we suggest, is that the stochastic stem cells in the chemotherapy curable malignancies take on a significant aspect of the biological characteristics of their parent cancer cells. This action includes for the chemotherapy curable malignancies the heightened pro-apoptotic sensitivity linked to their respective associated unique genetic events. For the chemotherapy curable malignancies the combination of the relationship of their cancer stem cells combined with the extreme inherent sensitivity to induction of apoptosis from DNA damaging agents plays a key role in determining their overall curability with chemotherapy.
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Prasanphanich AF, White DE, Gran MA, Kemp ML. Kinetic Modeling of ABCG2 Transporter Heterogeneity: A Quantitative, Single-Cell Analysis of the Side Population Assay. PLoS Comput Biol 2016; 12:e1005188. [PMID: 27851764 PMCID: PMC5113006 DOI: 10.1371/journal.pcbi.1005188] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Accepted: 10/10/2016] [Indexed: 12/13/2022] Open
Abstract
The side population (SP) assay, a technique used in cancer and stem cell research, assesses the activity of ABC transporters on Hoechst staining in the presence and absence of transporter inhibition, identifying SP and non-SP cell (NSP) subpopulations by differential staining intensity. The interpretation of the assay is complicated because the transporter-mediated mechanisms fail to account for cell-to-cell variability within a population or adequately control the direct role of transporter activity on staining intensity. We hypothesized that differences in dye kinetics at the single-cell level, such as ABCG2 transporter-mediated efflux and DNA binding, are responsible for the differential cell staining that demarcates SP/NSP identity. We report changes in A549 phenotype during time in culture and with TGFβ treatment that correlate with SP size. Clonal expansion of individually sorted cells re-established both SP and NSPs, indicating that SP membership is dynamic. To assess the validity of a purely kinetics-based interpretation of SP/NSP identity, we developed a computational approach that simulated cell staining within a heterogeneous cell population; this exercise allowed for the direct inference of the role of transporter activity and inhibition on cell staining. Our simulated SP assay yielded appropriate SP responses for kinetic scenarios in which high transporter activity existed in a portion of the cells and little differential staining occurred in the majority of the population. With our approach for single-cell analysis, we observed SP and NSP cells at both ends of a transporter activity continuum, demonstrating that features of transporter activity as well as DNA content are determinants of SP/NSP identity.
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Affiliation(s)
- Adam F. Prasanphanich
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University, Atlanta, Georgia, United States of America
| | - Douglas E. White
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University, Atlanta, Georgia, United States of America
| | - Margaret A. Gran
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University, Atlanta, Georgia, United States of America
| | - Melissa L. Kemp
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University, Atlanta, Georgia, United States of America
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Stahl M, Kim TK, Zeidan AM. Update on acute myeloid leukemia stem cells: New discoveries and therapeutic opportunities. World J Stem Cells 2016; 8:316-331. [PMID: 27822339 PMCID: PMC5080639 DOI: 10.4252/wjsc.v8.i10.316] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 08/11/2016] [Accepted: 08/29/2016] [Indexed: 02/06/2023] Open
Abstract
The existence of cancer stem cells has been well established in acute myeloid leukemia. Initial proof of the existence of leukemia stem cells (LSCs) was accomplished by functional studies in xenograft models making use of the key features shared with normal hematopoietic stem cells (HSCs) such as the capacity of self-renewal and the ability to initiate and sustain growth of progenitors in vivo. Significant progress has also been made in identifying the phenotype and signaling pathways specific for LSCs. Therapeutically, a multitude of drugs targeting LSCs are in different phases of preclinical and clinical development. This review focuses on recent discoveries which have advanced our understanding of LSC biology and provided rational targets for development of novel therapeutic agents. One of the major challenges is how to target the self-renewal pathways of LSCs without affecting normal HSCs significantly therefore providing an acceptable therapeutic window. Important issues pertinent to the successful design and conduct of clinical trials evaluating drugs targeting LSCs will be discussed as well.
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63
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Kim B, Feng S, Yun SW, Leong C, Satapathy R, Wan SYD, Chang YT. A Fluorescent Probe for Neural Stem/Progenitor Cells with High Differentiation Capability into Neurons. Chembiochem 2016; 17:2118-2122. [PMID: 27782351 DOI: 10.1002/cbic.201600490] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Indexed: 01/28/2023]
Abstract
Selection of a specific neural stem/progenitor cells (NSPCs) has attracted broad attention in regenerative medicine for neurological disorders. Here, we report a fluorescent probe, CDg13, and its application for isolating strong neurogenic NSPCs. In comparison to the NSPCs isolated by other biomarkers, CDg13-stained NSPCs showed higher capability to differentiate into neurons. Target identification revealed that the fluorescence intensity of the probe within cells is inversely proportional to the expression levels of mouse and human Abcg2 transporters. These findings suggest that low Abcg2 expression is a biomarker for neurogenic NSPCs in mouse brain. Furthermore, CDg13 can be used to isolate Abcg2low cells from heterogeneous cell populations.
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Affiliation(s)
- Beomsue Kim
- Laboratory of Bioimaging Probe Development, Singapore Bioimaging Consortium, Singapore, 138667, Singapore
| | - Suihan Feng
- Department of Chemistry and Medicinal Chemistry Programme, National University of Singapore, Singapore, 117543, Singapore
| | - Seong-Wook Yun
- Laboratory of Bioimaging Probe Development, Singapore Bioimaging Consortium, Singapore, 138667, Singapore
| | - Cheryl Leong
- Laboratory of Bioimaging Probe Development, Singapore Bioimaging Consortium, Singapore, 138667, Singapore
| | - Rudrakanta Satapathy
- Department of Chemistry and Medicinal Chemistry Programme, National University of Singapore, Singapore, 117543, Singapore
| | - Si Yan Diana Wan
- Laboratory of Bioimaging Probe Development, Singapore Bioimaging Consortium, Singapore, 138667, Singapore
| | - Young-Tae Chang
- Department of Chemistry and Medicinal Chemistry Programme, National University of Singapore, Singapore, 117543, Singapore.,Laboratory of Bioimaging Probe Development, Singapore Bioimaging Consortium, Singapore, 138667, Singapore
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Lu BC, Li J, Yu WF, Zhang GZ, Wang HM, Ma HM. Elevated expression of Nrf2 mediates multidrug resistance in CD133 + head and neck squamous cell carcinoma stem cells. Oncol Lett 2016; 12:4333-4338. [PMID: 28101198 PMCID: PMC5228276 DOI: 10.3892/ol.2016.5269] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Accepted: 04/12/2016] [Indexed: 02/07/2023] Open
Abstract
Enhanced expression of the ATP-binding cassette (ABC) transporter protein ABC sub-family G member 2 (ABCG2) in cancer stem cells (CSCs) plays a major role in chemotherapeutic drug efflux, which results in therapy failure and tumor relapse. In addition to downregulating apoptosis in CSCs, it has been reported that the transcriptional upregulation of the redox sensing factor Nrf2 is involved in the upregulation of ABCG2 expression and consequent chemoresistance. The current study investigated the presence of cancer stem-like side population (SP) cells from head and neck squamous cell carcinoma (HNSCC) samples, and evaluated the Nrf2 expression profile and multidrug resistance properties of HNSCC stem cells. Fluorescence-activated cell sorting was used for SP cells detection, while reverse transcription-polymerase chain reaction was used for the analysis of Nrf2 expression. The present study identified ~2.1% SP cells present in HNSCC specimens, which were positive for cluster of differentiation (CD)133 expression and displayed significantly elevated messenger RNA expression of Nrf2, compared with non-SP cells. These data suggest that the ABC transporter ABCG2 is highly upregulated in SP cells, and this results in multidrug resistance. In addition, these CD133+ cells underwent rapid proliferation and exhibited high self-renewal and tumorigenic properties. Taken together, the present findings suggest that elevated expression of Nrf2 mediated drug resistance in HNSCC CSCs, which may be one of the causative factors for cancer treatment failure. Therefore, novel anti-cancer drugs that downregulate the Nrf2 signaling pathway could effectively improve the treatment and survival rate of patients with HNSCC.
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Affiliation(s)
- Bao-Cai Lu
- Department of Ear-Nose-Throat, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
| | - Jing Li
- Department of Ear-Nose-Throat, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
| | - Wen-Fa Yu
- Department of Ear-Nose-Throat, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
| | - Guo-Zheng Zhang
- Department of Ear-Nose-Throat, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
| | - Hui-Min Wang
- Department of Ear-Nose-Throat, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
| | - Hui-Min Ma
- Department of Ear-Nose-Throat, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
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van Niekerk G, Davids LM, Hattingh SM, Engelbrecht AM. Cancer stem cells: A product of clonal evolution? Int J Cancer 2016; 140:993-999. [PMID: 27676693 DOI: 10.1002/ijc.30448] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Accepted: 09/19/2016] [Indexed: 12/30/2022]
Abstract
The cancer stem cell (CSC) model has emerged as a prominent paradigm for explaining tumour heterogeneity. CSCs in tumour recurrence and drug resistance have also been implicated in a number of studies. In fact, CSCs are often identified by their expression of drug-efflux proteins which are also highly expressed in normal stem cells. Similarly, pro-survival or proliferation signalling often exhibited by stem cells is regularly reported as being upregulated by CSC. Here we review evidence suggesting that many aspects of CSCs are more readily described by clonal evolution. As an example, cancer cells often exhibit copy number gains of genes involved in drug-efflux proteins and pro-survival signalling. Consequently, clonal selection for stem cell traits may result in cancer cells developing "stemness" traits which impart a fitness advantage, without strictly following a CSC model. Finally, since symmetric cell division would give rise to more cells than asymmetric division, it is expected that more advanced tumours would depart from a CSC. Collectively, these observations suggest clonal evolution may explain many aspects of the CSC.
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Affiliation(s)
- Gustav van Niekerk
- Department of Physiological Sciences, Stellenbosch University, Stellenbosch, South Africa
| | - Lester M Davids
- Department of Human Biology, Division of Cell Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa
| | - Suzèl M Hattingh
- Department of Biomedical Sciences, Division of Medical Physiology, Faculty of Medicine and Health Sciences, Stellenbosch University, Tygerberg, South Africa
| | - Anna-Mart Engelbrecht
- Department of Physiological Sciences, Stellenbosch University, Stellenbosch, South Africa
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Wang Z, Wang N, Liu P, Peng F, Tang H, Chen Q, Xu R, Dai Y, Lin Y, Xie X, Peng C, Situ H. Caveolin-1, a stress-related oncotarget, in drug resistance. Oncotarget 2016; 6:37135-50. [PMID: 26431273 PMCID: PMC4741920 DOI: 10.18632/oncotarget.5789] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 09/08/2015] [Indexed: 12/28/2022] Open
Abstract
Caveolin-1 (Cav-1) is both a tumor suppressor and an oncoprotein. Cav-1 overexpression was frequently confirmed in advanced cancer stages and positively associated with ABC transporters, cancer stem cell populations, aerobic glycolysis activity and autophagy. Cav-1 was tied to various stresses including radiotherapy, fluid shear and oxidative stresses and ultraviolet exposure, and interacted with stress signals such as AMP-activated protein kinase. Finally, a Cav-1 fluctuation model during cancer development is provided and Cav-1 is suggested to be a stress signal and cytoprotective. Loss of Cav-1 may increase susceptibility to oncogenic events. However, research to explore the underlying molecular network between Cav-1 and stress signals is warranted.
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Affiliation(s)
- Zhiyu Wang
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Neng Wang
- Department of Breast Oncology, Sun Yat-sen Univeristy Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Pengxi Liu
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Fu Peng
- Pharmacy College, State Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Guangzhou, China
| | - Hailin Tang
- Department of Breast Oncology, Sun Yat-sen Univeristy Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Qianjun Chen
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Rui Xu
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yan Dai
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yi Lin
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xiaoming Xie
- Department of Breast Oncology, Sun Yat-sen Univeristy Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Cheng Peng
- Pharmacy College, State Key Laboratory Breeding Base of Systematic Research, Development and Utilization of Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Guangzhou, China
| | - Honglin Situ
- Department of Mammary Disease, Guangdong Provincial Hospital of Chinese Medicine, The Second Clinical Collage of Guangzhou University of Chinese Medicine, Guangzhou, China
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Meissner K, Heydrich B, Jedlitschky G, Meyer Zu Schwabedissen H, Mosyagin I, Dazert P, Eckel L, Vogelgesang S, Warzok RW, Böhm M, Lehmann C, Wendt M, Cascorbi I, Kroemer HK. The ATP-binding Cassette Transporter ABCG2 (BCRP), a Marker for Side Population Stem Cells, Is Expressed in Human Heart. J Histochem Cytochem 2016; 54:215-21. [PMID: 16116030 DOI: 10.1369/jhc.5a6750.2005] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Efforts to improve severely impaired myocardial function include transplantation of autologous hematopoietic side population (SP) stem cells. The transmembrane ABC-type (ATP binding cassette) half-transporter ABCG2 (BCRP) serves as a marker protein for SP cell selection. We have recently shown that other ABC transport proteins such as ABCB1 and ABCC5 are differentially expressed in normal and diseased human heart. Here we investigated localization and individual ABCG2 expression in 15 ventricular (including 10 cardiomyopathic) and 51 auricular heart tissue samples using immunohistochemistry, confocal laser scanning fluorescence microscopy, and real-time RT-PCR. Individual genotypes were assigned using PCR–restriction fragment length polymorphism (RFLP) analysis and subsequently correlated to ABCG2 mRNA levels. ABCG2 was localized in endothelial cells of capillaries and arterioles of all samples. Ventricular samples from cardiomyopathic hearts exhibited significantly increased levels of ABCG2 mRNA (ABCG2/18S rRNA: 1.08 ± 0.30 × 10−7; p = 0.028 (dilative cardiomyopathy) and 1.16 ± 0.46 × 10−7; p = 0.009 (ischemic cardiomyopathy) compared with 0.44 ± 0.26 × 10−7 in nonfailing hearts). The individual haplotypes were not associated with altered mRNA expression. ABCG2 is variably expressed in endothelial cells of human heart, where it may function as a protective barrier against cardiotoxic drugs such as anthracyclines or mitoxantrone. ABCG2 expression is induced in dilative and ischemic cardiomyopathies.
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Affiliation(s)
- Konrad Meissner
- Institut für Pharmakologie, Ernst-Moritz-Arndt-Universität Greifswald, Friedrich-Loeffler-Str. 23d, D-17487 Greifswald, Germany
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68
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Veréb Z, Póliska S, Albert R, Olstad OK, Boratkó A, Csortos C, Moe MC, Facskó A, Petrovski G. Role of Human Corneal Stroma-Derived Mesenchymal-Like Stem Cells in Corneal Immunity and Wound Healing. Sci Rep 2016; 6:26227. [PMID: 27195722 PMCID: PMC4872602 DOI: 10.1038/srep26227] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 04/25/2016] [Indexed: 12/13/2022] Open
Abstract
Corneal tissue regeneration is of crucial importance for maintaining normal vision. We aimed to isolate and cultivate human corneal stroma-derived mesenchymal stem-like cells (CSMSCs) from the central part of cadaver corneas and study their phenotype, multipotency, role in immunity and wound healing. The isolated cells grew as monolayers in vitro, expressed mesenchymal- and stemness-related surface markers (CD73, CD90, CD105, CD140b), and were negative for hematopoietic markers as determined by flow cytometry. CSMSCs were able to differentiate in vitro into fat, bone and cartilage. Their gene expression profile was closer to bone marrow-derived MSCs (BMMSCs) than to limbal epithelial stem cells (LESC) as determined by high-throughput screening. The immunosuppressive properties of CSMSCs were confirmed by a mixed lymphocyte reaction (MLR), while they could inhibit proliferation of activated immune cells. Treatment of CSMSCs by pro-inflammatory cytokines and toll-like receptor ligands significantly increased the secreted interleukin-6 (IL-6), interleukin-8 (IL-8) and C-X-C motif chemokine 10 (CXCL-10) levels, as well as the cell surface adhesion molecules. CSMSCs were capable of closing a wound in vitro under different stimuli. These cells thus contribute to corneal tissue homeostasis and play an immunomodulatory and regenerative role with possible implications in future cell therapies for treating sight-threatening corneal diseases.
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Affiliation(s)
- Zoltán Veréb
- Stem Cells and Eye Research Laboratory, Department of Ophthalmology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Szilárd Póliska
- Center for Clinical Genomics and Personalized Medicine, Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary
| | - Réka Albert
- Stem Cells and Eye Research Laboratory, Department of Ophthalmology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Ole Kristoffer Olstad
- Department of Medical Biochemistry, Oslo University Hospital and University of Oslo, Oslo, Norway
| | - Anita Boratkó
- Department of Medical Chemistry, University of Debrecen, Debrecen, Hungary
| | - Csilla Csortos
- Department of Medical Chemistry, University of Debrecen, Debrecen, Hungary
| | - Morten C Moe
- Centre of Eye Research, Department of Ophthalmology, Oslo University Hospital, University of Oslo, Oslo, Norway
| | - Andrea Facskó
- Stem Cells and Eye Research Laboratory, Department of Ophthalmology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Goran Petrovski
- Stem Cells and Eye Research Laboratory, Department of Ophthalmology, Faculty of Medicine, University of Szeged, Szeged, Hungary.,Centre of Eye Research, Department of Ophthalmology, Oslo University Hospital, University of Oslo, Oslo, Norway
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69
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Luo C, Lü D, Pan J, Long M. Improving the Gene Transfection in Human Embryonic Stem Cells: Balancing with Cytotoxicity and Pluripotent Maintenance. ACS APPLIED MATERIALS & INTERFACES 2016; 8:8367-8375. [PMID: 26971622 DOI: 10.1021/acsami.6b00353] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Manipulation of genes in human embryonic stem cells (hESCs) is imperative for their highly potential applications; however, the transduction efficiency remains very low. Although existing evidence revealed the type, size, and zeta potential of vector affect gene transfection efficiency in cells, the systematic study in hESCs is scarce. In this study, using poly(amidoamine) (PAMAM) dendrimers ended with amine, hydroxyl, or carboxyl as model, we tested the influences of size and surface group as well as cytotoxicity and endocytosis on hESC gene transfection. We found that in culture medium of mTeSR the particle sizes of G5, G7, G4.5COOH, and G5OH were around 5 nm and G1 had a smaller size of 3.14 nm. G5 and G7 had a slight and significant positive zeta potential, respectively, whereas G1 was slightly negative, and G4.5COOH and G5OH were significantly negative. We demonstrated that only amine-terminated dendrimers accomplished gene transfection in hESCs, which is greater than that from Lipofectamine 2000 transfection. Ten micromolar G5 had the greatest efficiency and was better than 1000 μM G1. Only a low concentration (0.5 and 1 μM) of G7 realized gene delivery. Amine-ended dendrimers, especially with higher generations, were detrimental to the growth and pluripotent maintenance of hESCs. In contrast, similarly sized hydroxyl- and carboxyl-terminated dendrimers exerted much lower cytotoxicity, in which carboxyl-terminated dendrimer maintained pluripotency of hESCs. We also confirmed the endocytosis into and significant exocytosis from hESCs using FITC-labeled G5 dendrimer. These results suggested that careful considerations of size, concentration, and zeta potential, particularly the identity and position of groups, as well as minimized exocytosis in the design of a vector for hESC gene delivery are necessary, which helps to better design an effective vector in hESC gene transduction.
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Affiliation(s)
- Chunhua Luo
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, College of Bioengineering, Chongqing University , Chongqing 400044, China
- Center for Biomechanics and Bioengineering, Key Laboratory of Microgravity (National Microgravity Laboratory) and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences , Beijing 100190, China
| | - Dongyuan Lü
- Center for Biomechanics and Bioengineering, Key Laboratory of Microgravity (National Microgravity Laboratory) and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences , Beijing 100190, China
| | - Jun Pan
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, College of Bioengineering, Chongqing University , Chongqing 400044, China
| | - Mian Long
- Center for Biomechanics and Bioengineering, Key Laboratory of Microgravity (National Microgravity Laboratory) and Beijing Key Laboratory of Engineered Construction and Mechanobiology, Institute of Mechanics, Chinese Academy of Sciences , Beijing 100190, China
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Hasanabady MH, Kalalinia F. ABCG2 inhibition as a therapeutic approach for overcoming multidrug resistance in cancer. J Biosci 2016; 41:313-24. [DOI: 10.1007/s12038-016-9601-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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71
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Zhao W, Uehera S, Tanaka K, Tadokoro S, Kusamori K, Katsumi H, Sakane T, Yamamoto A. Effects of Polyoxyethylene Alkyl Ethers on the Intestinal Transport and Absorption of Rhodamine 123: A P-glycoprotein Substrate by In Vitro and In Vivo Studies. J Pharm Sci 2016; 105:1526-34. [DOI: 10.1016/j.xphs.2016.01.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 01/06/2016] [Accepted: 01/20/2016] [Indexed: 11/28/2022]
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Abstract
There is substantial evidence that many cancers, including breast cancer, are driven by a population of cells that display stem cell properties. These cells, termed cancer stem cells (CSCs) or tumor initiating cells, not only drive tumor initiation and growth but also mediate tumor metastasis and therapeutic resistance. In this chapter, we summarize current advances in CSC research with a major focus on breast CSCs (BCSCs). We review the prevailing methods to isolate and characterize BCSCs and recent evidence documenting their cellular origins and phenotypic plasticity that enables them to transition between mesenchymal and epithelial-like states. We describe in vitro and clinical evidence that these cells mediate metastasis and treatment resistance in breast cancer, the development of novel strategies to isolate circulating tumor cells (CTCs) that contain CSCs and the use of patient-derived xenograft (PDX) models in preclinical breast cancer research. Lastly, we highlight several signaling pathways that regulate BCSC self-renewal and describe clinical implications of targeting these cells for breast cancer treatment. The development of strategies to effectively target BCSCs has the potential to significantly improve the outcomes for patients with breast cancer.
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Hermawan A, Wagner E, Roidl A. Consecutive salinomycin treatment reduces doxorubicin resistance of breast tumor cells by diminishing drug efflux pump expression and activity. Oncol Rep 2015; 35:1732-40. [PMID: 26708059 DOI: 10.3892/or.2015.4509] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 11/17/2015] [Indexed: 11/06/2022] Open
Abstract
Chemoresistance is a major challenge for the successful therapy of breast cancer. The discovery of salinomycin as an anticancer stem cell drug provides progress in overcoming chemoresistance. However, it remains to be elucidated whether salinomycin treatment is able to sensitize cancer cells to chemotherapeutic drugs. In the present study, we consecutively treated epithelial MCF-7 and BT-474 breast cancer cells as well as mesenchymal MDA-MB 231 and MDA-MB 436 cells with salinomycin, and analyzed the gene expression of the two prominent multiple drug resistance (MDR) genes, MDR1 and BCRP1. We found that repeated treatment with salinomycin generated resistance against this drug in all cell lines and increased the chemosensitivity towards doxorubicin. Drug efflux pump gene expression and pump activity of MDR1 and BCRP1 were downregulated in almost all cell lines, except for MDR1 in the MDA-MB 231 cells. Consequently, the intracellular doxorubicin accumulation was increased compared to the respective parental cells. Our findings suggest a novel treatment option for MDR tumors by sensitizing these tumors via salinomycin pretreatment.
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Affiliation(s)
- Adam Hermawan
- Pharmaceutical Biotechnology, Department of Pharmacy, Ludwig-Maximilian University of Munich, D-81377 Munich, Germany
| | - Ernst Wagner
- Pharmaceutical Biotechnology, Department of Pharmacy, Ludwig-Maximilian University of Munich, D-81377 Munich, Germany
| | - Andreas Roidl
- Pharmaceutical Biotechnology, Department of Pharmacy, Ludwig-Maximilian University of Munich, D-81377 Munich, Germany
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Segatto I, Berton S, Sonego M, Massarut S, Perin T, Piccoli E, Colombatti A, Vecchione A, Baldassarre G, Belletti B. Surgery-induced wound response promotes stem-like and tumor-initiating features of breast cancer cells, via STAT3 signaling. Oncotarget 2015; 5:6267-79. [PMID: 25026286 PMCID: PMC4171628 DOI: 10.18632/oncotarget.2195] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Inflammation is clinically linked to cancer but the mechanisms are not fully understood. Surgery itself elicits a range of inflammatory responses, suggesting that it could represent a perturbing factor in the process of local recurrence and/or metastasis formation. Post-surgery wound fluids (WF), drained from breast cancer patients, are rich in cytokines and growth factors, stimulate the in vitro growth of breast cancer cells and are potent activators of the STAT transcription factors. We wondered whether STAT signaling was functionally involved in the response of breast cancer cells to post-surgical inflammation. We discovered that WF induced the enrichment of breast cancer cells with stem-like phenotypes, via activation of STAT3. In vitro, WF highly stimulated mammosphere formation and self-renewal of breast cancer cells. In vivo, STAT3 signaling was critical for breast cancer cell tumorigenicity and for the formation of local relapse after surgery. Overall, we demonstrate here that surgery-induced inflammation promotes stem-like phenotypes and tumor-initiating abilities of breast cancer cells. Interfering with STAT3 signaling with a peri-surgical treatment is sufficient to strongly suppress this process. The understanding of the crosstalk between breast tumor-initiating cells and their microenvironment may open the way to successful targeting of these cells in their initial stages of growth and be eventually curative.
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Affiliation(s)
- Ilenia Segatto
- Division of Experimental Oncology 2, CRO, National Cancer Institute, Aviano 33081, Italy
| | - Stefania Berton
- Division of Experimental Oncology 2, CRO, National Cancer Institute, Aviano 33081, Italy
| | - Maura Sonego
- Division of Experimental Oncology 2, CRO, National Cancer Institute, Aviano 33081, Italy
| | - Samuele Massarut
- Breast Surgery Unit, CRO, National Cancer Institute, Aviano 33081, Italy
| | - Tiziana Perin
- Pathology Unit, CRO, National Cancer Institute, Aviano 33081, Italy
| | - Erica Piccoli
- Breast Surgery Unit, CRO, National Cancer Institute, Aviano 33081, Italy
| | - Alfonso Colombatti
- Division of Experimental Oncology 2, CRO, National Cancer Institute, Aviano 33081, Italy; Department of Scienze Biologiche e Mediche, MATI Center of Excellence, University of Udine, 33100 Udine, Italy
| | - Andrea Vecchione
- Division of Pathology, II University of Rome "La Sapienza", Santo Andrea Hospital, Rome 00189, Italy
| | - Gustavo Baldassarre
- Division of Experimental Oncology 2, CRO, National Cancer Institute, Aviano 33081, Italy
| | - Barbara Belletti
- Division of Experimental Oncology 2, CRO, National Cancer Institute, Aviano 33081, Italy
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75
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Alexandrova AY. Plasticity of tumor cell migration: acquisition of new properties or return to the past? BIOCHEMISTRY (MOSCOW) 2015; 79:947-63. [PMID: 25385021 DOI: 10.1134/s0006297914090107] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
During tumor development cancer cells pass through several stages when cell morphology and migration abilities change remarkably. These stages are named epithelial-mesenchymal and mesenchymal-amoeboid transitions. The molecular mechanisms underlying cell motility are changing during these transitions. As result of transitions the cells acquire new characteristics and modes of motility. Cell migration becomes more independent from the environmental conditions, and thus cell dissemination becomes more aggressive, which leads to formation of distant metastases. In this review we discuss the characteristics of each of the transitions, cell morphology, and the specificity of cellular structures responsible for different modes of cell motility as well as molecular mechanisms regulating each transition.
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Affiliation(s)
- A Y Alexandrova
- Institute of Carcinogenesis, Blokhin Cancer Research Center, Russian Academy of Medical Sciences, Moscow, 115478, Russia.
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76
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Khan MI, Czarnecka AM, Helbrecht I, Bartnik E, Lian F, Szczylik C. Current approaches in identification and isolation of human renal cell carcinoma cancer stem cells. Stem Cell Res Ther 2015; 6:178. [PMID: 26377541 PMCID: PMC4574074 DOI: 10.1186/s13287-015-0177-z] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
In recent years, cancer stem cells (CSCs)/tumor initiating cells (TICs) have been identified inside different tumors. However, currently used anti-cancer therapies are mostly directed against somatic tumor cells without targeting CSCs/TICs. CSCs/TICs also gain resistance to chemotherapies/radiotherapies. For the development of efficient treatment strategies, choosing the best method for isolation and characterization of CSCs/TICs is still debated among the scientific community. In this review, we summarize recent data concerning isolation techniques for CSCs using magnetic cell sorting and flow cytometry. The review focuses on the strategies for sample preparation during flow cytometric analysis, elaborating biomarkers such as CXCR4, CD105, and CD133. In addition, functional properties characteristic of CSCs/TICs using side population selection through Hoechst 33342 dye, aldehyde dehydrogenase 1, dye-cycle violet, and rhodamine 123 are also discussed. We also include a special focus on enriching CSCs/TICs using three-dimensional cell culture models such as agarose–agarose microbeads and sphere formation.
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Affiliation(s)
- Mohammed I Khan
- Molecular Oncology Laboratory, Clinic of Oncology, Military Institute of Medicine, ul. Szaserów 128, 04-141, Warsaw, Poland.
| | - Anna M Czarnecka
- Molecular Oncology Laboratory, Clinic of Oncology, Military Institute of Medicine, ul. Szaserów 128, 04-141, Warsaw, Poland
| | - Igor Helbrecht
- Molecular Oncology Laboratory, Clinic of Oncology, Military Institute of Medicine, ul. Szaserów 128, 04-141, Warsaw, Poland
| | - Ewa Bartnik
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, 02-106, Warsaw, Poland.,Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106, Warsaw, Poland
| | - Fei Lian
- Department of Urology, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Cezary Szczylik
- Molecular Oncology Laboratory, Clinic of Oncology, Military Institute of Medicine, ul. Szaserów 128, 04-141, Warsaw, Poland
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77
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GUAN GUOFANG, ZHANG DEJUN, ZHENG YING, WEN LIANJI, YU DUOJIAO, LU YANQING, ZHAO YAN. Significance of ATP-binding cassette transporter proteins in multidrug resistance of head and neck squamous cell carcinoma. Oncol Lett 2015; 10:631-636. [PMID: 26622545 PMCID: PMC4509069 DOI: 10.3892/ol.2015.3359] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 03/06/2015] [Indexed: 12/26/2022] Open
Abstract
According to the cancer stem cell theory, a small subpopulation of cancer cells, known as cancer stem cells (CSCs), exist that are self-renewing and are involved in tumor invasion, metastasis and recurrence. A number of studies have reported that certain cancer cells are able to efflux the Hoechst 33342 dye. These cells are termed side population (SP) cells and share characteristic features of CSCs. The results of the present study revealed that 2.7% of primary head and neck squamous cell carcinoma (HNSCC) cells were SP cells. This was reduced to 0.7% following treatment with verapamil. The immunofluorescence and reverse transcription polymerase chain reaction analysis revealed that SP cells have an enhanced expression of the ATP-binding cassette (ABC) transporter protein ABC subfamily G, member 2 (ABCG2), which has been identified to be actively involved in drug exclusion. Similarly, the mRNA level of the oncogene B lymphoma Mo-MLV insertion region-1 and the stem cell surface proteins nestin and octamer-binding transcription factor-4 were highly expressed in the SP cells compared with the non-SP cells. In addition, it was demonstrated that HNSCC SP cells exhibited increased proliferation and were highly resistant to multiple drugs. These findings suggest that the presence of CSCs, such as SP cells, may be responsible for chemotherapy failure and tumor relapse in patients with HNSCC. Therefore, the identification of a novel therapeutic drug that could effectively target CSCs may help to eradicate refractory tumors.
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Affiliation(s)
- GUO-FANG GUAN
- Department of Otolaryngology, Head and Neck Surgery, The Second Hospital of Jilin University, Changchun, Jilin 130041, P.R. China
| | - DE-JUN ZHANG
- Department of Otolaryngology, Head and Neck Surgery, The Second Hospital of Jilin University, Changchun, Jilin 130041, P.R. China
| | - YING ZHENG
- Department of Otolaryngology, Head and Neck Surgery, Tumor Hospital of Jilin, Changchun, Jilin 130012, P.R. China
| | - LIAN-JI WEN
- Department of Otolaryngology, Head and Neck Surgery, The Second Hospital of Jilin University, Changchun, Jilin 130041, P.R. China
| | - DUO-JIAO YU
- Department of Otolaryngology, Head and Neck Surgery, The Second Hospital of Jilin University, Changchun, Jilin 130041, P.R. China
| | - YAN-QING LU
- Department of Otolaryngology, Head and Neck Surgery, The Second Hospital of Jilin University, Changchun, Jilin 130041, P.R. China
| | - YAN ZHAO
- Department of Otolaryngology, Head and Neck Surgery, The Second Hospital of Jilin University, Changchun, Jilin 130041, P.R. China
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78
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Wang X, Wang N, Cheung F, Lao L, Li C, Feng Y. Chinese medicines for prevention and treatment of human hepatocellular carcinoma: current progress on pharmacological actions and mechanisms. JOURNAL OF INTEGRATIVE MEDICINE-JIM 2015; 13:142-64. [PMID: 26006028 DOI: 10.1016/s2095-4964(15)60171-6] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hepatocellular carcinoma (HCC) is one of leading causes of death in the world. Although various treatments have been developed, the therapeutic side effects are far from desirable. Chinese medicines (CMs, including plants, animal parts and minerals) have drawn a great deal of attention in recent years for their potential in the treatment of HCC. Most studies have shown that CMs may be able to retard HCC progression with multiple actions, either alone or in combination with other conventional therapies to improve quality of life in HCC patients. Additionally, CMs are used for preventing HCC occurrence. The aim of this study is to review the potential prophylactic and curative effects of CMs on human HCC and the possible mechanisms that underlie these pharmacological actions. Publications were collected and reviewed from PubMed and China National Knowledge Infrastructure from 2000 to 2014. Keywords for literature searches include "Chinese medicine", "Chinese herb", "traditional Chinese Medicine", "hepatocellular carcinoma" and "liver cancer". CMs in forms of pure compounds, isolated fractions, and composite formulas are included. Combination therapies are also considered. Both in vitro and in vivo efficacies of CMs are being discussed and the translational potential to bedside is to be discussed with clinical cases, which show the actions of CMs on HCC may include tumor growth inhibition, antimetastatic activities, anti-inflammation, anti-liver cancer stem cells, reversal on multi-drug resistance and induction/reduction of oxidative stress. Multiple types of molecules are found to contribute in the above actions. The review paper indicated that CMs might have potential to both prevent HCC occurrence and retard HCC progression with several molecular targets involved.
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Affiliation(s)
- Xuanbin Wang
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, China
| | - Ning Wang
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, China
| | - Fan Cheung
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, China
| | - Lixing Lao
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, China
| | - Charlie Li
- California Department of Public Health, Richmond, CA 94804, USA
| | - Yibin Feng
- School of Chinese Medicine, The University of Hong Kong, Hong Kong, China
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79
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Kang D, Park JM, Jung CK, Lee BI, Oh ST, Choi MG. Prognostic impact of membranous ATP-binding cassette Sub-family G member 2 expression in patients with colorectal carcinoma after surgical resection. Cancer Biol Ther 2015; 16:1438-44. [PMID: 26176272 DOI: 10.1080/15384047.2015.1071736] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
ATP-binding cassette sub-family G member 2 (ABCG2) is a transporter protein that has been associated with multidrug resistance and poor prognosis in several types of cancers. In colorectal cancers, however, the prognostic value of ABCG2 expression is not yet clear. ABCG2 expression was analyzed by immunohistochemistry using tissue microarrays in 234 consecutive patients who underwent surgical resection. The ABCG2 expression level was defined by the composite score, determined by multiplying intensity and percentage of tumor staining scores. This was dichotomized at the median, and the association of ABCG2 expression with disease severity and patient survival was determined. ABCG2 expression in the cytoplasm and membrane was observed in 77.8% and 61.5% of the samples, respectively. High expression of ABCG2 in both the cytoplasm and membrane was found more frequently in well-differentiated lesions (P < 0.05). High expression of membranous ABCG2 was significantly associated with better overall survival (hazard ratio [HR], 0.624; 95% confidence interval [CI], 0.411-0.948; P = 0.027) and disease-specific survival (HR, 0.499; 95% CI, 0.308 - 0.808; P = 0.005) compared to low expression. However, cytoplasmic expression of ABCG2 was not significantly associated with patient survival. The expression level of membranous ABCG2 in colorectal tumors can predict post-operative patient survival, suggesting the potential for ABCG2 as a prognostic biomarker.
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Affiliation(s)
- Donghoon Kang
- a Department of Internal Medicine ; College of Medicine ; The Catholic University of Korea ; Seoul , Korea
| | - Jae Myung Park
- a Department of Internal Medicine ; College of Medicine ; The Catholic University of Korea ; Seoul , Korea
| | - Chan Kwon Jung
- b Hospital Pathology ; College of Medicine ; The Catholic University of Korea ; Seoul , Korea
| | - Bo-In Lee
- a Department of Internal Medicine ; College of Medicine ; The Catholic University of Korea ; Seoul , Korea
| | - Seong Taek Oh
- c Surgery: College of Medicine ; The Catholic University of Korea ; Seoul , Korea
| | - Myung-Gyu Choi
- a Department of Internal Medicine ; College of Medicine ; The Catholic University of Korea ; Seoul , Korea
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80
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Fardel O, Le Vee M, Jouan E, Denizot C, Parmentier Y. Nature and uses of fluorescent dyes for drug transporter studies. Expert Opin Drug Metab Toxicol 2015; 11:1233-51. [PMID: 26050735 DOI: 10.1517/17425255.2015.1053462] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Drug transporters are now recognized as major players involved in pharmacokinetics and toxicology. Methods for assessing their activity are important to consider, particularly owing to regulatory requirements with respect to inhibition of drug transporter activity and prediction of drug-drug interactions. In this context, the use of fluorescent-dye-based transport assays is likely to deserve attention. AREAS COVERED This review provides an overview of the nature of fluorescent dye substrates for ATP-binding cassette and solute carrier drug transporters. Their use for investigating drug transporter activity in cultured cells and clinical hematological samples, drug transporter inhibition, drug transporter imaging and drug transport at the organ level are summarized. EXPERT OPINION A wide range of fluorescent dyes is now available for use in various aspects of drug transporter studies. The use of these dyes for transporter analyses may, however, be hampered by classic pitfalls of fluorescence technology, such as quenching. Transporter-independent processes such as passive diffusion of dyes through plasma membrane or dye sequestration into subcellular compartments must also be considered, as well as the redundant handling by various distinct transporters of some fluorescent probes. Finally, standardization of dye-based transport assays remains an important on-going issue.
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Affiliation(s)
- Olivier Fardel
- Institut de Recherches en Santé, Environnement et Travail (IRSET) , UMR INSERM U1085, Faculté de Pharmacie, 2 Avenue du Pr Léon Bernard, 35043 Rennes , France
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81
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An Update on Ocular Surface Epithelial Stem Cells: Cornea and Conjunctiva. Stem Cells Int 2015; 2015:601731. [PMID: 26146504 PMCID: PMC4471309 DOI: 10.1155/2015/601731] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 05/21/2015] [Accepted: 05/25/2015] [Indexed: 01/09/2023] Open
Abstract
The human ocular surface (front surface of the eye) is formed by two different types of epithelia: the corneal epithelium centrally and the conjunctival epithelium that surrounds this. These two epithelia are maintained by different stem cell populations (limbal stem cells for the corneal epithelium and the conjunctival epithelial stem cells). In this review, we provide an update on our understanding of these epithelia and their stem cells systems, including embryology, new markers, and controversy around the location of these stem cells. We also provide an update on the translation of this understanding into clinical applications for the treatment of debilitating ocular surface diseases.
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82
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Zhang P, de Gooijer MC, Buil LCM, Beijnen JH, Li G, van Tellingen O. ABCB1 and ABCG2 restrict the brain penetration of a panel of novel EZH2-Inhibitors. Int J Cancer 2015; 137:2007-18. [PMID: 25868794 DOI: 10.1002/ijc.29566] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 03/25/2015] [Indexed: 12/18/2022]
Abstract
Enhancer of Zeste Homolog 2 (EZH2) has emerged as a promising therapeutic target for treatment of a broad spectrum of tumors including gliomas. We explored the interactions of five novel, structurally similar EZH2 inhibitors (EPZ005687, EPZ-6438, UNC1999, GSK343 and GSK126) with P-glycoprotein (P-gp/ABCB1) and breast cancer resistance protein (BCRP/ABCG2). The compounds were screened by in vitro transwell assays and EPZ005687, EPZ-6438 and GSK126 were further tested in vivo using wild-type (WT), Abcb1 and/or Abcg2 knockout mice. All EZH2 inhibitors are transported by P-gp and BCRP, although in vitro the transporter affinity of GSK126 was obscured by very low membrane permeability. Both P-gp and Bcrp1 restrict the brain penetration of EPZ005687 and GSK126, whereas the brain accumulation of EPZ-6438 is limited by P-gp only and efflux of EPZ-6438 was completely abrogated by elacridar. Intriguingly, an unknown factor present in all knockout mouse strains causes EPZ005687 and EPZ-6438 retention in plasma relative to WT mice, a phenomenon not seen with GSK126. In WT mice, the GSK126 tissue-to-plasma ratio for all tissues is lower than for EPZ005687 or EPZ-6438. Moreover, the oral bioavailability of GSK126 is only 0.2% in WT mice, which increases to 14.4% in Abcb1;Abcg2 knockout mice. These results are likely due to poor membrane permeability and question the clinical usefulness of GSK126. Although all tested EZH2 inhibitors are substrates of P-gp and BCRP, restricting the brain penetration and potential utility for treatment of glioma, EPZ-6438 would be the most suitable candidate of this series.
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Affiliation(s)
- Ping Zhang
- Department of Neurosurgery, Qilu Hospital, Shandong University, Jinan, People's Republic of China.,Department of Bio-Pharmacy/Mouse Cancer Clinic, The Netherlands Cancer Institute (Antoni van Leeuwenhoek), Amsterdam, The Netherlands
| | - Mark C de Gooijer
- Department of Bio-Pharmacy/Mouse Cancer Clinic, The Netherlands Cancer Institute (Antoni van Leeuwenhoek), Amsterdam, The Netherlands
| | - Levi C M Buil
- Department of Bio-Pharmacy/Mouse Cancer Clinic, The Netherlands Cancer Institute (Antoni van Leeuwenhoek), Amsterdam, The Netherlands
| | - Jos H Beijnen
- Department of Pharmacy and Pharmacology, The Netherlands Cancer Institute/Slotervaart Hospital, Amsterdam, The Netherlands.,Division of Drug Toxicology, Faculty of Pharmacy, Utrecht University, Utrecht, The Netherlands
| | - Gang Li
- Department of Neurosurgery, Qilu Hospital, Shandong University, Jinan, People's Republic of China
| | - Olaf van Tellingen
- Department of Bio-Pharmacy/Mouse Cancer Clinic, The Netherlands Cancer Institute (Antoni van Leeuwenhoek), Amsterdam, The Netherlands
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83
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Pollyea DA, Gutman JA, Gore L, Smith CA, Jordan CT. Targeting acute myeloid leukemia stem cells: a review and principles for the development of clinical trials. Haematologica 2015; 99:1277-84. [PMID: 25082785 DOI: 10.3324/haematol.2013.085209] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Despite an increasingly rich understanding of its pathogenesis, acute myeloid leukemia remains a disease with poor outcomes, overwhelmingly due to disease relapse. In recent years, work to characterize the leukemia stem cell population, the disease compartment most difficult to eliminate with conventional therapy and most responsible for relapse, has been undertaken. This, in conjunction with advances in drug development that have allowed for increasingly targeted therapies to be engineered, raises the hope that we are entering an era in which the leukemia stem cell population can be eliminated, resulting in therapeutic cures for acute myeloid leukemia patients. For these therapies to become available, they must be tested in the setting of clinical trials. A long-established clinical trials infrastructure has been employed to shepherd new therapies from proof-of-concept to approval. However, due to the unique features of leukemia stem cells, drugs that are designed to specifically eliminate this population may not be adequately tested when applied to this model. Therefore, in this review article, we seek to identify the relevant features of acute myeloid leukemia stem cells for clinical trialists, discuss potential strategies to target leukemia stem cells, and propose a set of guidelines outlining the necessary elements of clinical trials to allow for the successful testing of stem cell-directed therapies.
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Affiliation(s)
- Daniel A Pollyea
- Division of Hematology, University of Colorado School of Medicine, Aurora, CO
| | - Jonathan A Gutman
- Division of Hematology, University of Colorado School of Medicine, Aurora, CO
| | - Lia Gore
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, USA
| | - Clayton A Smith
- Division of Hematology, University of Colorado School of Medicine, Aurora, CO
| | - Craig T Jordan
- Division of Hematology, University of Colorado School of Medicine, Aurora, CO
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84
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Maliyakkal N, Appadath Beeran A, Balaji SA, Udupa N, Ranganath Pai S, Rangarajan A. Effects of Withania somnifera and Tinospora cordifolia extracts on the side population phenotype of human epithelial cancer cells: toward targeting multidrug resistance in cancer. Integr Cancer Ther 2014; 14:156-71. [PMID: 25549922 DOI: 10.1177/1534735414564423] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Recent reports suggest the existence of a subpopulation of stem-like cancer cells, termed as cancer stem cells (CSCs), which bear functional and phenotypic resemblance with the adult, tissue-resident stem cells. Side population (SP) assay based on differential efflux of Hoechst 33342 has been effectively used for the isolation of CSCs. The drug resistance properties of SP cells are typically due to the increased expression of ABC transporters leading to drug efflux. Conventionally used chemotherapeutic drugs may often leads to an enrichment of SP, revealing their inability to target the drug-resistant SP and CSCs. Thus, identification of agents that can reduce the SP phenotype is currently in vogue in cancer therapeutics. Withania somnifera (WS) and Tinospora cordifolia (TC) have been used in Ayurveda for treating various diseases, including cancer. In the current study, we have investigated the effects of ethanolic (ET) extracts of WS and TC on the cancer SP phenotype. Interestingly, we found significant decrease in SP on treatment with TC-ET, but not with WS-ET. The SP-inhibitory TC-ET was further fractionated into petroleum ether (TC-PET), dichloromethane (TC-DCM), and n-butyl alcohol (TC-nBT) fractions using bioactivity-guided fractionation. Our data revealed that TC-PET and TC-DCM, but not TC-nBT, significantly inhibited SP in a dose-dependent manner. Furthermore, flow cytometry-based functional assays revealed that TC-PET and TC-DCM significantly inhibited ABC-B1 and ABC-G2 transporters and sensitized cancer cells toward chemotherapeutic drug-mediated cytotoxicity. Thus, the TC-PET and TC-DCM may harbor phytochemicals with the potential to reverse the drug-resistant phenotype, thus improving the efficacy of cancer chemotherapy.
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Affiliation(s)
- Naseer Maliyakkal
- Indian Institute of Science (IISc), Bangalore, India Manipal University, Manipal, Karnataka, India
| | | | - Sai A Balaji
- Indian Institute of Science (IISc), Bangalore, India
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85
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Luckenbach T, Fischer S, Sturm A. Current advances on ABC drug transporters in fish. Comp Biochem Physiol C Toxicol Pharmacol 2014; 165:28-52. [PMID: 24858718 DOI: 10.1016/j.cbpc.2014.05.002] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 05/13/2014] [Accepted: 05/14/2014] [Indexed: 01/14/2023]
Abstract
Most members of the large ATP-binding cassette (ABC) gene family are transporters involved in substrate translocation across biological membranes. In eukaryotes, ABC proteins functioning as drug transporters are located in the plasma membrane and mediate the cellular efflux of a wide range of organic chemicals, with some transporters also transporting certain metals. As the enhanced expression of ABC drug transporters can confer multidrug resistance (MDR) to cancers and multixenobiotic resistance (MXR) to organisms from polluted habitats, these ABC family members are also referred to as MDR or MXR proteins. In mammals, ABC drug transporters show predominant expression in tissues involved in excretion or constituting internal or external body boundaries, where they facilitate the excretion of chemicals and their metabolites, and limit chemical uptake and penetration into "sanctuary" sites of the body. Available knowledge about ABC proteins is still limited in teleost fish, a large vertebrate group of high ecological and economic importance. Using transport activity measurements and immunochemical approaches, early studies demonstrated similarities in the tissue distribution of ABC drug transporters between teleosts and mammals, suggesting conserved roles of the transporters in the biochemical defence against toxicants. Recently, the availability of teleost genome assemblies has stimulated studies of the ABC family in this taxon. This review summarises the current knowledge regarding the genetics, functional properties, physiological function, and ecotoxicological relevance of teleostean ABC transporters. The available literature is reviewed with emphasis on recent studies addressing the tissue distribution, substrate spectrum, regulation, physiological function and phylogenetic origin of teleostean ABC transporters.
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Affiliation(s)
- Till Luckenbach
- Department of Bioanalytical Ecotoxicology, UFZ-Helmholtz Centre for Environmental Research, 04318 Leipzig, Germany
| | - Stephan Fischer
- Department of Environmental Toxicology, Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, Switzerland; Department of Environmental Systems Sciences, ETH Zürich, Institute of Biogeochemistry and Pollutant Dynamics, 8092 Zürich, Switzerland
| | - Armin Sturm
- Institute of Aquaculture, School of Natural Sciences, University of Stirling, Stirling FK9 4LA, Scotland, UK.
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86
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To KKW, Tomlinson B. Targeting the ABCG2-overexpressing multidrug resistant (MDR) cancer cells by PPARγ agonists. Br J Pharmacol 2014; 170:1137-51. [PMID: 24032744 DOI: 10.1111/bph.12367] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 07/22/2013] [Accepted: 08/23/2013] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND AND PURPOSE Multidrug resistance (MDR), usually mediated by overexpression of efflux transporters such as P-gp, ABCG2 and/or MRP1, remains a major obstacle hindering successful cancer chemotherapy. There has been great interest in the development of inhibitors towards these transporters to circumvent resistance. However, since the inhibition of transporter is not specific to cancer cells, a decrease in the cytotoxic drug dosing may be needed to prevent excess toxicity, thus undermining the potential benefit brought about by a drug efflux inhibitor. The design of potent MDR modulators specific towards resistant cancer cells and devoid of drug-drug interactions will be needed to effect MDR reversal. EXPERIMENTAL APPROACH Recent evidence suggests that the PTEN/PI3K/Akt pathway may be exploited to alter ABCG2 subcellular localization, thereby circumventing MDR. Three PPARγ agonists (telmisartan, pioglitazone and rosiglitazone) that have been used in the clinics were tested for their effect on the PTEN/PI3K/Akt pathway and possible reversal of ABCG2-mediated drug resistance. KEY RESULTS The PPARγ agonists were found to be weak ABCG2 inhibitors by drug efflux assay. They were also shown to elevate the reduced PTEN expression in a resistant and ABCG2-overexpressing cell model, which inhibit the PI3K-Akt pathway and lead to the relocalization of ABCG2 from the plasma membrane to the cytoplasma, thus apparently circumventing the ABCG2-mediated MDR. CONCLUSIONS AND IMPLICATIONS Since this PPARγ/PTEN/PI3K/Akt pathway regulating ABCG2 is only functional in drug-resistant cancer cells with PTEN loss, the PPARγ agonists identified may represent promising agents targeting resistant cells for MDR reversal.
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Affiliation(s)
- Kenneth K W To
- School of Pharmacy, The Chinese University of Hong Kong, Hong Kong
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87
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Wessel GM, Brayboy L, Fresques T, Gustafson EA, Oulhen N, Ramos I, Reich A, Swartz SZ, Yajima M, Zazueta V. The biology of the germ line in echinoderms. Mol Reprod Dev 2014; 81:679-711. [PMID: 23900765 PMCID: PMC4102677 DOI: 10.1002/mrd.22223] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Accepted: 07/23/2013] [Indexed: 12/16/2022]
Abstract
The formation of the germ line in an embryo marks a fresh round of reproductive potential. The developmental stage and location within the embryo where the primordial germ cells (PGCs) form, however, differs markedly among species. In many animals, the germ line is formed by an inherited mechanism, in which molecules made and selectively partitioned within the oocyte drive the early development of cells that acquire this material to a germ-line fate. In contrast, the germ line of other animals is fated by an inductive mechanism that involves signaling between cells that directs this specialized fate. In this review, we explore the mechanisms of germ-line determination in echinoderms, an early-branching sister group to the chordates. One member of the phylum, sea urchins, appears to use an inherited mechanism of germ-line formation, whereas their relatives, the sea stars, appear to use an inductive mechanism. We first integrate the experimental results currently available for germ-line determination in the sea urchin, for which considerable new information is available, and then broaden the investigation to the lesser-known mechanisms in sea stars and other echinoderms. Even with this limited insight, it appears that sea stars, and perhaps the majority of the echinoderm taxon, rely on inductive mechanisms for germ-line fate determination. This enables a strongly contrasted picture for germ-line determination in this phylum, but one for which transitions between different modes of germ-line determination might now be experimentally addressed.
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Affiliation(s)
- Gary M. Wessel
- Department of Molecular Biology, Cellular Biology, and Biochemistry, Brown University, Providence, Rhode Island
| | - Lynae Brayboy
- Department of Molecular Biology, Cellular Biology, and Biochemistry, Brown University, Providence, Rhode Island
| | - Tara Fresques
- Department of Molecular Biology, Cellular Biology, and Biochemistry, Brown University, Providence, Rhode Island
| | - Eric A. Gustafson
- Department of Molecular Biology, Cellular Biology, and Biochemistry, Brown University, Providence, Rhode Island
| | - Nathalie Oulhen
- Department of Molecular Biology, Cellular Biology, and Biochemistry, Brown University, Providence, Rhode Island
| | - Isabela Ramos
- Department of Molecular Biology, Cellular Biology, and Biochemistry, Brown University, Providence, Rhode Island
| | - Adrian Reich
- Department of Molecular Biology, Cellular Biology, and Biochemistry, Brown University, Providence, Rhode Island
| | - S. Zachary Swartz
- Department of Molecular Biology, Cellular Biology, and Biochemistry, Brown University, Providence, Rhode Island
| | - Mamiko Yajima
- Department of Molecular Biology, Cellular Biology, and Biochemistry, Brown University, Providence, Rhode Island
| | - Vanessa Zazueta
- Department of Molecular Biology, Cellular Biology, and Biochemistry, Brown University, Providence, Rhode Island
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88
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Vaz AP, Ponnusamy MP, Rachagani S, Dey P, Ganti AK, Batra SK. Novel role of pancreatic differentiation 2 in facilitating self-renewal and drug resistance of pancreatic cancer stem cells. Br J Cancer 2014; 111:486-96. [PMID: 25003666 PMCID: PMC4119968 DOI: 10.1038/bjc.2014.152] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Accepted: 02/27/2014] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Cancer stem cells (CSCs) contribute towards disease aggressiveness and drug resistance. Specific identification of CSC maintenance genes and targeting can improve the efficiency of currently available treatment modalities. Pancreatic differentiation 2 (PD2) has a major role in the self-renewal of mouse embryonic stem cells. In the present study, we investigated the role of PD2 in pancreatic CSCs. METHODS Characterisation of CSCs and non-CSCs from mouse models, pancreatic cancer cells and human tissues by CSC and self-renewal marker analysis using confocal assay. Effect of PD2 knockdown in CSCs (after gemcitabine treatment) was studied by immunoblot and apoptosis assays. RESULTS A subpopulation of cells displayed PD2 overexpression in mouse (Kras(G12D); Pdx1-Cre and Kras(G12D); Trp53(R172H/+); Pdx1-Cre) and human pancreatic tumours, which co-express CSC markers. Cancer stem cells exhibited elevated expression of PD2 and self-renewal markers, such as Oct3/4, Shh and β-catenin. Gemcitabine treatment maintained the CSC population with simultaneous maintenance of PD2 and CSC marker expression. Knockdown of PD2 in CSCs resulted in reduced viability of cells and enhanced apoptosis along with abrogated expression of CD133 and MDR2. CONCLUSIONS Our results suggest that PD2 is a novel CSC maintenance protein, loss of which renders the CSCs more susceptible to drug-induced cell death.
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Affiliation(s)
- A P Vaz
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - M P Ponnusamy
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - S Rachagani
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - P Dey
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - A K Ganti
- 1] Department of Internal Medicine, VA Nebraska Western Iowa Health Care System, University of Nebraska Medical Center, Omaha, NE, USA [2] Division of Oncology-Hematology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - S K Batra
- 1] Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA [2] Buffet Cancer Center, Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA
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89
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Effect of Hypoxia on Porphyrin Metabolism in Bone Marrow Mesenchymal Stem Cells. Bull Exp Biol Med 2014; 157:167-71. [DOI: 10.1007/s10517-014-2516-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Indexed: 12/16/2022]
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90
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Ninomiya T, Hiraga T, Hosoya A, Ohnuma K, Ito Y, Takahashi M, Ito S, Asashima M, Nakamura H. Enhanced Bone-Forming Activity of Side Population Cells in the Periodontal Ligament. Cell Transplant 2014; 23:691-701. [DOI: 10.3727/096368913x663587] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Regeneration of alveolar bone is critical for the successful treatment of periodontal diseases. The periodontal ligament (PDL) has been widely investigated as a source of cells for the regeneration of periodontal tissues. In the present study where we attempted to develop an effective strategy for alveolar bone regeneration, we examined the osteogenic potential of side population (SP) cells, a stem cell-containing population that has been shown to be highly abundant in several kinds of tissues, in PDL cells. Isolated SP cells from the rat PDL exhibited a superior ability to differentiate into osteoblastic cells compared with non-SP (NSP) and unsorted PDL cells in vitro. The mRNA expressions of osteoblast markers and bone morphogenetic protein (BMP) 2 were significantly upregulated in SP cells and were further increased by osteogenic induction. To examine the bone-forming activity of SP cells in vivo, PDL SP cells isolated from green fluorescent protein (GFP)-transgenic rats were transplanted with hydroxyapatite (HA) disks into wild-type animals. SP cells exhibited a high ability to induce the mineralized matrix compared with NSP and unsorted PDL cells. At 12 weeks after the implantation, some of the pores in the HA disks with SP cells were filled with mineralized matrices, which were positive for bone matrix proteins, such as osteopontin, bone sialoprotein, and osteocalcin. Furthermore, osteoblast- and osteocyte-like cells on and in the bone-like mineralized matrices were GFP positive, suggesting that the matrices were directly formed by the transplanted cells. These results suggest that PDL SP cells possess enhanced osteogenic potential and could be a potential source for cell-based regenerative therapy for alveolar bone.
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Affiliation(s)
- Tadashi Ninomiya
- Division of Hard Tissue Research, Institute for Oral Science, Matsumoto Dental University, Shiojiri, Nagano, Japan
| | - Toru Hiraga
- Department of Histology and Cell Biology, Matsumoto Dental University, Shiojiri, Nagano, Japan
| | - Akihiro Hosoya
- Department of Histology and Cell Biology, Matsumoto Dental University, Shiojiri, Nagano, Japan
| | - Kiyoshi Ohnuma
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Meguro-ku, Tokyo, Japan
| | - Yuzuru Ito
- Research Center for Stem Cell Engineering (SCRC), National Institute of Advanced Industrial Science and Technology (AIST), Higashi, Tsukuba, Ibaraki, Japan
| | - Masafumi Takahashi
- Division of Bioimaging Sciences, Center for Molecular Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Susumu Ito
- Division of Instrumental Analysis, Research Center for Human and Environmental Sciences, Shinshu University, Matsumoto, Nagano, Japan
| | - Makoto Asashima
- Department of Life Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Meguro-ku, Tokyo, Japan
- Research Center for Stem Cell Engineering (SCRC), National Institute of Advanced Industrial Science and Technology (AIST), Higashi, Tsukuba, Ibaraki, Japan
| | - Hiroaki Nakamura
- Department of Histology and Cell Biology, Matsumoto Dental University, Shiojiri, Nagano, Japan
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91
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Xia H, Yu C, Zhang W, Zhang B, Zhao Y, Fang F. [Identification and isolation of cancer stem cells from A549 cells]. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2014; 16:400-4. [PMID: 23945242 PMCID: PMC6000669 DOI: 10.3779/j.issn.1009-3419.2013.08.02] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
背景与目的 肺癌干细胞是肺癌恶性表型的根源和潜在的治疗靶点,从人肺癌A549细胞株中分离肺癌干细胞,观察特异性干细胞标志物分子的表达,为进一步的干细胞研究提供试验基础。 方法 接种肺癌A549细胞株,经流式细胞术,特异性筛选分离肺癌干细胞,观察克隆形成能力、细胞增殖能力和体外致瘤能力的差别,并分别用RT-PCR和Western blot的方法分析干细胞标志物分子CD133和ABCG2的表达。 结果 经过流式细胞仪成功分选了人肺腺癌A549细胞系SP细胞亚群,结果表明此SP细胞亚群约占A549细胞总数的5.93%,经维拉帕米处理后Hoechest33342阴性/弱阳性细胞含量下降为0.32%,SP细胞克隆形成能力,细胞增殖能力和体外致瘤能力均明显高于非SP细胞。RT-PCR和Western blot结果发现,筛选分离的肺癌SP细胞群高表达干细胞标志物分子CD133和ABCG2。 结论 通过流式细胞术可以筛选分离高表达CD133和ABCG2分子的肺癌干细胞,可用于进一步的研究中。
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Affiliation(s)
- Hui Xia
- Department of Carciothoracic Surgery, the First Affiliated Hospital of the General Hospital of PLA, Beijing 100048, China.
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92
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Minn I, Wang H, Mease RC, Byun Y, Yang X, Wang J, Leach SD, Pomper MG. A red-shifted fluorescent substrate for aldehyde dehydrogenase. Nat Commun 2014; 5:3662. [PMID: 24759454 PMCID: PMC4063304 DOI: 10.1038/ncomms4662] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 03/14/2014] [Indexed: 12/22/2022] Open
Abstract
Selection of cells positive for aldehyde dehydrogenase (ALDH) activity from a green fluorescent background is difficult with existing reagents. Here we report a red-shifted fluorescent substrate for ALDH, AldeRed 588-A, for labeling viable ALDHpos cells. We demonstrate that AldeRed 588-A successfully isolates ALDHhi human hematopoietic stem cells from heterogeneous cord blood mononuclear cells. AldeRed 588-A can be used for multi-color applications to fractionate ALDHpos cells in the presence of green fluorophores including the ALDEFLUOR™ reagent and cells expressing eGFP. AldeRed 588-A stains ALDHpos murine pancreatic centroacinar and terminal duct cells, as visualized by fluorescent microscopy. AldeRed588-A provides a useful tool to select stem cells or study ALDH within a green fluorescent background.
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Affiliation(s)
- Il Minn
- 1] Russel H. Morgan Department of Radiology and Radiological Science, Baltimore, Maryland 21287, USA [2]
| | - Haofan Wang
- 1] Russel H. Morgan Department of Radiology and Radiological Science, Baltimore, Maryland 21287, USA [2]
| | - Ronnie C Mease
- Russel H. Morgan Department of Radiology and Radiological Science, Baltimore, Maryland 21287, USA
| | - Youngjoo Byun
- College of Pharmacy, Korea University, 2511 Sejong-ro, Jochiwon-eup, Sejong 339-700, South Korea
| | - Xing Yang
- Russel H. Morgan Department of Radiology and Radiological Science, Baltimore, Maryland 21287, USA
| | - Julia Wang
- Department of Surgery and the McKusick-Nathans Institute of Genetic Medicine, Baltimore, Maryland 21205, USA
| | - Steven D Leach
- Department of Surgery and the McKusick-Nathans Institute of Genetic Medicine, Baltimore, Maryland 21205, USA
| | - Martin G Pomper
- 1] Russel H. Morgan Department of Radiology and Radiological Science, Baltimore, Maryland 21287, USA [2] Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, Maryland 21287, USA
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93
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Expression of the ABC transport proteins MDR1 (ABCB1) and BCRP (ABCG2) in bovine rumen. J Comp Physiol B 2014; 184:673-81. [DOI: 10.1007/s00360-014-0804-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 01/07/2014] [Accepted: 01/13/2014] [Indexed: 01/08/2023]
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94
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Kathawala RJ, Chen JJ, Zhang YK, Wang YJ, Patel A, Wang DS, Talele TT, Ashby CR, Chen ZS. Masitinib antagonizes ATP-binding cassette subfamily G member 2-mediated multidrug resistance. Int J Oncol 2014; 44:1634-42. [PMID: 24626598 PMCID: PMC4027943 DOI: 10.3892/ijo.2014.2341] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Accepted: 02/06/2014] [Indexed: 12/15/2022] Open
Abstract
In this in vitro study, we determined whether masitinib could reverse multidrug resistance (MDR) in cells overexpressing the ATP binding cassette subfamily G member 2 (ABCG2) transporter. Masitinib (1.25 and 2.5 μM) significantly decreases the resistance to mitoxantrone (MX), SN38 and doxorubicin in HEK293 and H460 cells overexpressing the ABCG2 transporter. In addition, masitinib (2.5 μM) significantly increased the intracellular accumulation of [3H]-MX, a substrate for ABCG2, by inhibiting the function of ABCG2 and significantly decreased the efflux of [3H]-MX. However, masitinib (2.5 μM) did not significantly alter the expression of the ABCG2 protein. In addition, a docking model suggested that masitinib binds within the transmembrane region of a homology-modeled human ABCG2 transporter. Overall, our in vitro findings suggest that masitinib reverses MDR to various anti-neoplastic drugs in HEK293 and H460 cells overexpressing ABCG2 by inhibiting their transport activity as opposed to altering their levels of expression.
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Affiliation(s)
- Rishil J Kathawala
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY, USA
| | - Jun-Jiang Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY, USA
| | - Yun-Kai Zhang
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY, USA
| | - Yi-Jun Wang
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY, USA
| | - Atish Patel
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY, USA
| | - De-Shen Wang
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY, USA
| | - Tanaji T Talele
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY, USA
| | - Charles R Ashby
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY, USA
| | - Zhe-Sheng Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, St. John's University, Queens, NY, USA
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95
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Wang X, Yang S, Zhao X, Guo H, Ling X, Wang L, Fan C, Yu J, Zhou S. OCT3 and SOX2 promote the transformation of Barrett's esophagus to adenocarcinoma by regulating the formation of tumor stem cells. Oncol Rep 2014; 31:1745-53. [PMID: 24481676 DOI: 10.3892/or.2014.3003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 12/20/2013] [Indexed: 11/06/2022] Open
Abstract
Barrett's esophagus (BE) is a type of precancerosis and a key risk factor for esophagus adenocarcinoma (EAC). Tumor stem cells may be the source for BE transforming to EAC. Octamer transcription factor-3/4 (OCT3/4) and SOX2 are the main transcriptional controlling factors and markers of tumor stem cells. In the present study, we observed that the expressions of OCT3/4, SOX2, TCL1 and AKT1 in BE were elevated compared to normal esophagus but were decreased compared to EAC. Moreover, we isolated a few stem-like cells in OE33 cells which showed similar biological behavior to tumor stem cells. Notably, we found that downregulation of OCT3/4 expression by siRNA inhibited the ability of clone formation and invasion of OE33 cells, and decreased the formation of side population cells and slow cycle cells. Therefore, we concluded that OCT3/4 and SOX2 play a critical role in the transformation of BE to EAC by regulating the formation of tumor stem cells and the TCL1/AKT1 pathway.
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Affiliation(s)
- Xingwei Wang
- Department of Gastroenterology, The Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Shiming Yang
- Department of Gastroenterology, The Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Xiaoyan Zhao
- Department of Gastroenterology, The Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Hong Guo
- Department of Gastroenterology, The Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Xianlong Ling
- Department of Gastroenterology, The Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Lei Wang
- Department of Gastroenterology, The Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Chaoqiang Fan
- Department of Gastroenterology, The Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Jing Yu
- Department of Gastroenterology, The Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, P.R. China
| | - Shiwen Zhou
- National Base for Drug Clinical Trial, The Second Affiliated Hospital, Third Military Medical University, Chongqing 400037, P.R. China
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96
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Çakır B, Kılıçkaya O. Whole-genome survey of the putative ATP-binding cassette transporter family genes in Vitis vinifera. PLoS One 2013; 8:e78860. [PMID: 24244377 PMCID: PMC3823996 DOI: 10.1371/journal.pone.0078860] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2013] [Accepted: 09/20/2013] [Indexed: 11/18/2022] Open
Abstract
The ATP-binding cassette (ABC) protein superfamily constitutes one of the largest protein families known in plants. In this report, we performed a complete inventory of ABC protein genes in Vitis vinifera, the whole genome of which has been sequenced. By comparison with ABC protein members of Arabidopsis thaliana, we identified 135 putative ABC proteins with 1 or 2 NBDs in V. vinifera. Of these, 120 encode intrinsic membrane proteins, and 15 encode proteins missing TMDs. V. vinifera ABC proteins can be divided into 13 subfamilies with 79 “full-size,” 41 “half-size,” and 15 “soluble” putative ABC proteins. The main feature of the Vitis ABC superfamily is the presence of 2 large subfamilies, ABCG (pleiotropic drug resistance and white-brown complex homolog) and ABCC (multidrug resistance-associated protein). We identified orthologs of V. vinifera putative ABC transporters in different species. This work represents the first complete inventory of ABC transporters in V. vinifera. The identification of Vitis ABC transporters and their comparative analysis with the Arabidopsis counterparts revealed a strong conservation between the 2 species. This inventory could help elucidate the biological and physiological functions of these transporters in V. vinifera.
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Affiliation(s)
- Birsen Çakır
- Department of Horticulture, Faculty of Agriculture, Ege University, Bornova, Izmir, Turkey
- * E-mail:
| | - Ozan Kılıçkaya
- Graduate School of Natural and Applied Sciences, Department of Biotechnology, Ege University, Bornova, Izmir, Turkey
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97
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Tomiyasu S, Miyamoto T, Mori M, Yaguchi T, Yakushiji H, Ohno S, Miyake Y, Sakaguchi T, Ueda M, Ohno E. Isolation of side population cells from endometrial cancer cells using a violet laser diode. Hum Cell 2013; 27:36-42. [PMID: 24092528 DOI: 10.1007/s13577-013-0079-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 09/04/2013] [Indexed: 12/26/2022]
Abstract
Cancer stem cells (CSCs) possess the ability for self-renewal, differentiation, and tumorigenesis and play a role in cancer recurrence and metastasis. CSCs are usually sorted in analysis into side population (SP) cells using ultraviolet (UV) laser (350 nm) excitation; they cannot be stained with Hoechst 33342 because of their efflux ability. However, it is difficult to avoid cell damage using a UV laser. Therefore, we attempted to isolate CSCs using a violet laser (407 nm) excitation to avoid cellular DNA damage. We sorted SP cells and main population (MP) cells from a human endometrial cancer cell line using the FACSAria system equipped with a violet laser and analyzed the biological properties of these cells. SP cells exhibited drug efflux, self-renewal, differentiation abilities, and tumorigenicity. It was found that v-Ki-ras2 Kirsten rat sarcoma viral oncogene homolog (KRAS) expression was significantly higher in SP cells than in MP cells. Our results suggest that CSCs exist in the SP fraction sorted using the FACSAria system equipped with a violet laser, which presents a useful tool to isolate small populations of viable putative CSCs from solid tumors and can be used to identify and characterize CSCs.
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Affiliation(s)
- Satoshi Tomiyasu
- Department of Chemical Technology, Graduate School of Science and Industrial Technology, Kurashiki University of Science and the Arts, Kurashiki, Japan
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98
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Yang WJ, Song MJ, Park EY, Lee JJ, Park JH, Park K, Park JH, Kim HP. Transcription factors Sp1 and Sp3 regulate expression of human ABCG2 gene and chemoresistance phenotype. Mol Cells 2013; 36:368-75. [PMID: 23996530 PMCID: PMC3887993 DOI: 10.1007/s10059-013-0191-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 07/15/2013] [Accepted: 07/16/2013] [Indexed: 12/21/2022] Open
Abstract
ABCG2 is a member of the ATP binding cassette (ABC) transmembrane proteins that plays an important role in stem cell biology and drug resistance of cancer cells. In this study, we investigated how expression of human ABCG2 gene is regulated in lung cancer A549 cells. Binding of Sp1 and Sp3 transcription factors to the ABCG2 promoter in vitro and in vivo was elucidated by electrophoretic mobility shift assay and chromatin immunoprecipitation assay. The ABCG2 promoter activity was impaired when Sp1 sites were mutated but was enhanced by overexpression of Sp1 or Sp3 proteins. Knockdown of Sp1 or Sp3 expression by short interfering RNA significantly decreased the expression of ABCG2 mRNA and protein, resulting in attenuated formation of the side population in A549 cells. In addition, Sp1 inhibition in vivo by mithramycin A suppressed the percentage of the side population fraction and sphere forming activities of A549 cells. Moreover, inhibiting Sp1- or Sp3-dependent ABCG2 expression caused chemosensitization to the anticancer drug cisplatin. Collectively, our results demonstrate that Sp1 and Sp3 transcription factors are the primary determinants for activating basal transcription of the ABCG2 gene and play an important role in maintaining the side population phenotype of lung cancer cells.
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Affiliation(s)
- Wook-Jin Yang
- Department of Environmental Medical Biology, Institute of Tropical Medicine, and Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Min-Ji Song
- Department of Environmental Medical Biology, Institute of Tropical Medicine, and Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Eun Young Park
- Department of Biological Science, Sookmyung Women's University, Seoul 140-742, Korea
| | - Jong-Joo Lee
- Department of Environmental Medical Biology, Institute of Tropical Medicine, and Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Joo-Hong Park
- Department of Environmental Medical Biology, Institute of Tropical Medicine, and Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Keunhee Park
- Department of Environmental Medical Biology, Institute of Tropical Medicine, and Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Jong Hoon Park
- Department of Biological Science, Sookmyung Women's University, Seoul 140-742, Korea
| | - Hyoung-Pyo Kim
- Department of Environmental Medical Biology, Institute of Tropical Medicine, and Brain Korea 21 Project for Medical Science, Yonsei University College of Medicine, Seoul 120-752, Korea
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99
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Characterization of a pituitary-tumor-derived cell line, TtT/GF, that expresses Hoechst efflux ABC transporter subfamily G2 and stem cell antigen 1. Cell Tissue Res 2013; 354:563-72. [DOI: 10.1007/s00441-013-1686-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Accepted: 06/25/2013] [Indexed: 02/06/2023]
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100
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Huang B, Huang YJ, Yao ZJ, Chen X, Guo SJ, Mao XP, Wang DH, Chen JX, Qiu SP. Cancer stem cell-like side population cells in clear cell renal cell carcinoma cell line 769P. PLoS One 2013; 8:e68293. [PMID: 23874578 PMCID: PMC3708929 DOI: 10.1371/journal.pone.0068293] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Accepted: 05/28/2013] [Indexed: 01/15/2023] Open
Abstract
Although cancers are widely considered to be maintained by stem cells, the existence of stem cells in renal cell carcinoma (RCC) has seldom been reported, in part due to the lack of unique surface markers. We here identified cancer stem cell-like cells with side population (SP) phenotype in five human RCC cell lines. Flow cytometry analysis revealed that 769P, a human clear cell RCC cell line, contained the largest amount of SP cells as compared with other four cell lines. These 769P SP cells possessed characteristics of proliferation, self-renewal, and differentiation, as well as strong resistance to chemotherapy and radiotherapy that were possibly related to the ABCB1 transporter. In vivo experiments with serial tumor transplantation in mice also showed that 769P SP cells formed tumors in NOD/SCID mice. Taken together, these results indicate that 769P SP cells have the properties of cancer stem cells, which may play important roles in tumorigenesis and therapy-resistance of RCC.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B
- ATP Binding Cassette Transporter, Subfamily B, Member 1/genetics
- Animals
- Carcinoma, Renal Cell/genetics
- Carcinoma, Renal Cell/pathology
- Cell Differentiation/genetics
- Cell Growth Processes/genetics
- Cell Line, Tumor
- Cell Transformation, Neoplastic/genetics
- Cell Transformation, Neoplastic/pathology
- Drug Resistance, Neoplasm
- Female
- Humans
- Kidney Neoplasms/genetics
- Kidney Neoplasms/pathology
- Mice
- Mice, Inbred NOD
- Mice, SCID
- Neoplasm Transplantation
- Neoplastic Stem Cells/pathology
- Side-Population Cells/pathology
- Transplantation, Heterologous
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Affiliation(s)
- Bin Huang
- Department of Urology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Yi Jun Huang
- Department of Pharmacology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
| | - Zhi Jun Yao
- Department of Urology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Xu Chen
- Department of Urology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Sheng Jie Guo
- Department of Urology, Sun Yat-Sen University Cancer Center, Guangzhou, China
| | - Xiao Peng Mao
- Department of Urology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Dao Hu Wang
- Department of Urology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Jun Xing Chen
- Department of Urology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
- * E-mail: (SPQ); (JXC)
| | - Shao Peng Qiu
- Department of Urology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
- * E-mail: (SPQ); (JXC)
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