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Grigoreva TA, Sagaidak AV, Vorona SV, Novikova DS, Tribulovich VG. ATP Mimetic Attack on the Nucleotide-Binding Domain to Overcome ABC Transporter Mediated Chemoresistance. ACS Med Chem Lett 2022; 13:1848-1855. [DOI: 10.1021/acsmedchemlett.2c00196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 11/10/2022] [Indexed: 11/29/2022] Open
Affiliation(s)
- Tatyana A. Grigoreva
- Laboratory of Molecular Pharmacology, St. Petersburg State Institute of Technology (Technical University), Moskovskii pr., 26, St. Petersburg, 190013 Russia
| | - Aleksandra V. Sagaidak
- Laboratory of Molecular Pharmacology, St. Petersburg State Institute of Technology (Technical University), Moskovskii pr., 26, St. Petersburg, 190013 Russia
| | - Svetlana V. Vorona
- Laboratory of Molecular Pharmacology, St. Petersburg State Institute of Technology (Technical University), Moskovskii pr., 26, St. Petersburg, 190013 Russia
| | - Daria S. Novikova
- Laboratory of Molecular Pharmacology, St. Petersburg State Institute of Technology (Technical University), Moskovskii pr., 26, St. Petersburg, 190013 Russia
| | - Vyacheslav G. Tribulovich
- Laboratory of Molecular Pharmacology, St. Petersburg State Institute of Technology (Technical University), Moskovskii pr., 26, St. Petersburg, 190013 Russia
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2
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Lupatov AY, Yarygin KN. Telomeres and Telomerase in the Control of Stem Cells. Biomedicines 2022; 10:biomedicines10102335. [PMID: 36289597 PMCID: PMC9598777 DOI: 10.3390/biomedicines10102335] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 09/15/2022] [Accepted: 09/16/2022] [Indexed: 11/16/2022] Open
Abstract
Stem cells serve as a source of cellular material in embryogenesis and postnatal growth and regeneration. This requires significant proliferative potential ensured by sufficient telomere length. Telomere attrition in the stem cells and their niche cells can result in the exhaustion of the regenerative potential of high-turnover organs, causing or contributing to the onset of age-related diseases. In this review, stem cells are examined in the context of the current telomere-centric theory of cell aging, which assumes that telomere shortening depends not just on the number of cell doublings (mitotic clock) but also on the influence of various internal and external factors. The influence of the telomerase and telomere length on the functional activity of different stem cell types, as well as on their aging and prospects of use in cell therapy applications, is discussed.
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Miyagi-Shiohira C, Saitoh I, Watanabe M, Noguchi H. Kyoto probe-1 reveals phenotypic differences between mouse ES cells and iTS-P cells. Sci Rep 2020; 10:18084. [PMID: 33093580 PMCID: PMC7582910 DOI: 10.1038/s41598-020-75016-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 10/09/2020] [Indexed: 01/05/2023] Open
Abstract
Kyoto probe 1 (KP-1) rapidly distinguishes between human ES/iPS (hES/iPS) cells and their differentiated cells. Recently, we generated induced tissue-specific stem cells from pancreas (iTS-P cells) using reprogramming factors and tissue-specific selection. The iTS-P cells have self-renewal potential, and subcutaneously transplanting them into immunodeficient mice did not generate teratomas. In this study, we applied KP-1 to analyze mouse ES (mES) cells and mouse iTS-P (miTS-P) cells. KP-1 completely stained mES cells in colonies, but only miTS-P cells at the edge of a colony. This difference was caused by cell type-specific expression of different ABC transporters. These finding suggest that KP-1 will be useful for distinguishing between iPS and iTS-P cells.
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Affiliation(s)
- Chika Miyagi-Shiohira
- Department of Regenerative Medicine, Graduate School of Medicine, University of the Ryukyus, 207 Uehara, Nishihara, Okinawa, 903-0215, Japan
| | - Issei Saitoh
- Division of Pediatric Dentistry, Graduate School of Medical and Dental Science, Niigata University, Niigata, 951-8514, Japan
| | - Masami Watanabe
- Department of Urology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, 700-8558, Japan
| | - Hirofumi Noguchi
- Department of Regenerative Medicine, Graduate School of Medicine, University of the Ryukyus, 207 Uehara, Nishihara, Okinawa, 903-0215, Japan.
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Yousaf M, Ali M. Modulation of ABCG2 surface expression by Rab5 and Rab21 to overcome multidrug resistance in cancer cells. Xenobiotica 2020; 50:988-996. [PMID: 31928387 DOI: 10.1080/00498254.2020.1716107] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Human ABCG2 is a half transporter implicated in drug efflux and development of multidrug resistance (MDR) in cancer cells. Here we present the regulatory effects of early endocytic Rab GTPases, Rab5A and Rab21 on ABCG2.ABCG2 was stably expressed in MCF-7 cells (MCF-7/G2). Rab5A and Rab21 were manipulated in MCF-7/G2 cells by co-expression or siRNA knockdown and their effect on ABCG2-mediated drug efflux was quantified using fluorescence microscopy.The ectopically expressed ABCG2 was predominantly confined to the plasma membrane and was capable of drug efflux. Expression of constitutively active Rab5A-Q79L mutant in MCF-7/G2 cells decreased the cell surface expression of ABCG2, resulting in the reduction of ABCG2-mediated drug efflux. In contrast, expression of inactive Rab5A-S34N mutant enhanced cell surface expression of ABCG2 and drug efflux. Moreover, reduction in endogenous Rab21 levels in MCF-7/G2 cells by siRNA knockdown, increased the surface localisation of ABCG2. Consequently, efflux ability of cells increased and intracellular retention of doxorubicin and Hoechst 33342; substrates of ABCG2, decreased significantly.These findings suggest that Rab5A and Rab21 play important roles in regulating ABCG2 surface localisation and turnover and can be exploited as a potential strategy to overcome MDR in cancer cells.
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Affiliation(s)
- Maryam Yousaf
- Institute of Biochemistry and Biotechnology, Quaid e Azam Campus, University of the Punjab, Lahore, Pakistan
| | - Moazzam Ali
- Institute of Biochemistry and Biotechnology, Quaid e Azam Campus, University of the Punjab, Lahore, Pakistan
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Side Population: Its Use in the Study of Cellular Heterogeneity and as a Potential Enrichment Tool for Rare Cell Populations. Stem Cells Int 2018; 2018:2472137. [PMID: 30627171 PMCID: PMC6304857 DOI: 10.1155/2018/2472137] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 11/07/2018] [Accepted: 11/14/2018] [Indexed: 12/16/2022] Open
Abstract
There is still much to learn about the cells used for cell- and gene-based therapies in the clinical setting. Stem cells are found in virtually all tissues in the human body. As a result, cells isolated from these tissues are a heterogeneous population consisting of various subpopulations including stem cells. Several strategies have been used to isolate and define the subpopulations that constitute these heterogeneous populations, one of which is the side population (SP) assay. SP cells are identified by their ability to efflux a fluorescent dye at a rate that is greater than the main cell population. This elevated rate of dye efflux has been attributed to the expression of members of the ATP-binding cassette (ABC) transporter protein family. SP cells have been identified in various tissues. In this review, we discuss the research to date on SP cells, focussing on SP cells identified in haematopoietic stem cells, adipose-derived stromal cells, and dental pulp.
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El-Masry MW, Gouda HM, Shaheen IA, Edesa W, Hassan NM, Ramzy R. Breast cancer resistance protein (BCRP) gene expression in a cohort of adult Egyptian patients with acute myeloid leukemia. Afr Health Sci 2018; 18:958-964. [PMID: 30766560 PMCID: PMC6354849 DOI: 10.4314/ahs.v18i4.15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Acute myeloid leukemia (AML), an aggressive clonal disease, is genetically heterozygous. The prognostic role of expression of Breast Cancer Resistance Protein (BCRP) gene, which behaves as a multidrug transporter, in adult AML is ambiguous. OBJECTIVE The objective is to assess the level of mRNA expression of BCRP gene in newly diagnosed cytogenetically normal adult Egyptian AML patients; and to clarify its potential influence and association between therapeutic responsiveness and disease free survival. METHODS The BCRP gene expression was evaluated by quantifying its mRNA using real time RT-PCR in fifty newly diagnosed cytogenetically normal adult AML patients and 20 healthy normal controls. The expression was evaluated in relation to clinical and prognostic factors, response to treatment and the survival rate. RESULTS BCRP mRNA was over expressed in adult AML patients compared to controls. This study showed a positive statistical correlation between BCRP gene expression and the percent of CD34 expression. Statistical analysis did not reveal any association between BCRP expression level and chemotherapeutic responsiveness or disease free survival rate. CONCLUSION The significance of BCRP gene expression and its function in AML is very complicated, therefore more standardized clinical studies are needed.
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Slack JMW. What is a stem cell? WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2018; 7:e323. [PMID: 29762894 DOI: 10.1002/wdev.323] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 04/04/2018] [Accepted: 04/13/2018] [Indexed: 12/16/2022]
Abstract
The historical roots of the stem cell concept are traced with respect to its usage in embryology and in hematology. The modern consensus definition of stem cells, comprising both pluripotent stem cells in culture and tissue-specific stem cells in vivo, is explained and explored. Methods for identifying stem cells are discussed with respect to cell surface markers, telomerase, label retention and transplantability, and properties of the stem cell niche are explored. The CreER method for identifying stem cells in vivo is explained, as is evidence in favor of a stochastic rather than an obligate asymmetric form of cell division. In conclusion, it is found that stem cells do not possess any unique and specific molecular markers; and stem cell behavior depends on the environment of the cell as well as the stem cell's intrinsic qualities. Furthermore, the stochastic mode of division implies that stem cell behavior is a property of a cell population not of an individual cell. In this sense, stem cells do not exist in isolation but only as a part of multicellular system. This article is categorized under: Adult Stem Cells, Tissue Renewal, and Regeneration > Tissue Stem Cells and Niches Adult Stem Cells, Tissue Renewal, and Regeneration > Methods and Principles Adult Stem Cells, Tissue Renewal, and Regeneration > Environmental Control of Stem Cells.
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Erdei Z, Schamberger A, Török G, Szebényi K, Várady G, Orbán TI, Homolya L, Sarkadi B, Apáti Á. Generation of multidrug resistant human tissues by overexpression of the ABCG2 multidrug transporter in embryonic stem cells. PLoS One 2018; 13:e0194925. [PMID: 29649238 PMCID: PMC5896897 DOI: 10.1371/journal.pone.0194925] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 03/13/2018] [Indexed: 12/21/2022] Open
Abstract
The ABCG2 multidrug transporter provides resistance against various endo- and xenobiotics, and protects the stem cells against toxins and stress conditions. We have shown earlier that a GFP-tagged version of ABCG2 is fully functional and may be used to follow the expression, localization and function of this transporter in living cells. In the present work we have overexpressed GFP-ABCG2, driven by a constitutive (CAG) promoter, in HUES9 human embryonic stem cells. Stem cell clones were generated to express the wild-type and a substrate-mutant (R482G) GFP-ABCG2 variant, by using the Sleeping Beauty transposon system. We found that the stable overexpression of these transgenes did not change the pluripotency and growth properties of the stem cells, nor their differentiation capacity to hepatocytes or cardiomyocytes. ABCG2 overexpression provided increased toxin resistance in the stem cells, and protected the derived cardiomyocytes against doxorubicin toxicity. These studies document the potential of a stable ABCG2 expression for engineering toxin-resistant human pluripotent stem cells and selected stem cell derived tissues.
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Affiliation(s)
- Zsuzsa Erdei
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Anita Schamberger
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - György Török
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Kornélia Szebényi
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - György Várady
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Tamás I. Orbán
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - László Homolya
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Balázs Sarkadi
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
- Institute of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
| | - Ágota Apáti
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
- * E-mail:
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Zhang X, Liu X, Zhou W, Yang M, Ding Y, Wang Q, Hu R. Fasudil increases temozolomide sensitivity and suppresses temozolomide-resistant glioma growth via inhibiting ROCK2/ABCG2. Cell Death Dis 2018; 9:190. [PMID: 29416017 PMCID: PMC5833824 DOI: 10.1038/s41419-017-0251-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 11/30/2017] [Accepted: 12/05/2017] [Indexed: 12/11/2022]
Abstract
Resistance to temozolomide (TMZ) is a major clinical challenge in glioma treatment, but the mechanisms of TMZ resistance are poorly understood. Here, we provided evidence that ROCK2 acted redundantly to maintain resistance of TMZ in TMZ-resistant gliomas, and as a ROCK2 phosphorylation inhibitor, fasudil significantly suppressed proliferation of TMZ-resistant gliomas in vivo and vitro via enhancing the chemosensitivity of TMZ. Additionally, the membrane translocation of ABCG2 was decreased with fasudil by ROCK2/moesin pathway. We also showed that fasudil suppressed the expression of ABCG2 via ROCK2/moesin/β-catenin pathway. Our results reveal an indispensable role for ROCK2 and provide strong evidence for the therapeutic use of fasudil in the clinical setting for TMZ-resistant gliomas.
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Affiliation(s)
- Xin Zhang
- State Key Laboratory of Natural Medicines, Department of Physiology, China Pharmaceutical University, Nanjing, Jiangsu, 210009, China
| | - Xiuting Liu
- State Key Laboratory of Natural Medicines, Department of Physiology, China Pharmaceutical University, Nanjing, Jiangsu, 210009, China
| | - Wei Zhou
- State Key Laboratory of Natural Medicines, Department of Physiology, China Pharmaceutical University, Nanjing, Jiangsu, 210009, China
| | - Mengdi Yang
- State Key Laboratory of Natural Medicines, Department of Physiology, China Pharmaceutical University, Nanjing, Jiangsu, 210009, China
| | - Yang Ding
- State Key Laboratory of Natural Medicines, Department of Physiology, China Pharmaceutical University, Nanjing, Jiangsu, 210009, China
| | - Qing Wang
- Department of Neurosurgery, Wuxi Second Hospital Affiliated Nanjing Medical University, Wuxi, Jiangsu, 214002, China.
| | - Rong Hu
- State Key Laboratory of Natural Medicines, Department of Physiology, China Pharmaceutical University, Nanjing, Jiangsu, 210009, China.
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Rosen MB, Jeffay SC, Nichols HP, Hoopes MR, Hunter ES. ATP Binding Cassette Sub-family Member 2 (ABCG2) and Xenobiotic Exposure During Early Mouse Embryonic Stem Cell Differentiation. Birth Defects Res 2018; 110:35-47. [PMID: 28990372 PMCID: PMC9831278 DOI: 10.1002/bdr2.1114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 07/25/2017] [Accepted: 07/28/2017] [Indexed: 01/13/2023]
Abstract
BACKGROUND ATP binding cassette sub-family member 2 (ABCG2) is a well-defined efflux transporter found in a variety of tissues. The role of ABCG2 during early embryonic development, however, is not established. Previous work which compared data from the ToxCast screening program with that from in-house studies suggested an association exists between exposure to xenobiotics that regulate Abcg2 transcription and differentiation of mouse embryonic stem cells (mESC), a relationship potentially related to redox homeostasis. METHODS mESC were grown for up to 9 days. Pharmacological inhibitors were used to assess transporter function with and without xenobiotic exposure. Proliferation and differentiation were evaluated using RedDot1 and quantiative reverse transcriptase-polymerase chain reaction, respectively. ABCG2 activity was assessed using a Pheophorbide a-based fluorescent assay. Protein expression was measured by capillary-based immunoassay. RESULTS ABCG2 activity increased in differentiating mESC. Treatment with K0143, an inhibitor of ABCG2, had no effect on proliferation or differentiation. As expected, mitoxantrone and topotecan, two chemotherapeutics, displayed increased toxicity in the presence of K0143. Exposure to K0143 in combination with chemicals predicted by ToxCast to regulate ABCG2 expression did not alter xenobiotic-induced toxicity. Moreover, inhibition of ABCG2 did not shift the toxicity of either tert-Butyl hydroperoxide or paraquat, two oxidative stressors. CONCLUSION As previously reported, ABCG2 serves a protective role in mESC. The role of ABCG2 in regulating redox status, however, was unclear. The hypothesis that ABCG2 plays a fundamental role during mESC differentiation or that regulation of the receptor by xenobiotics may be associated with altered mESC differentiation could not be supported. Birth Defects Research, 110:35-47, 2018. Published 2017. This article is a U.S. Government work and is in the public domain in the USA.
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Affiliation(s)
- Mitchell B Rosen
- U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Integrated Systems Toxicology Division, Research Triangle Park, North Carolina
| | - Susan C Jeffay
- U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Integrated Systems Toxicology Division, Research Triangle Park, North Carolina
| | - Harriette P Nichols
- U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Integrated Systems Toxicology Division, Research Triangle Park, North Carolina
| | - Maria R Hoopes
- U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Integrated Systems Toxicology Division, Research Triangle Park, North Carolina
| | - E Sidney Hunter
- U.S. Environmental Protection Agency, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Integrated Systems Toxicology Division, Research Triangle Park, North Carolina
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Xi X, Li T, Huang Y, Sun J, Zhu Y, Yang Y, Lu ZJ. RNA Biomarkers: Frontier of Precision Medicine for Cancer. Noncoding RNA 2017; 3:ncrna3010009. [PMID: 29657281 PMCID: PMC5832009 DOI: 10.3390/ncrna3010009] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Accepted: 02/13/2017] [Indexed: 12/15/2022] Open
Abstract
As an essential part of central dogma, RNA delivers genetic and regulatory information and reflects cellular states. Based on high-throughput sequencing technologies, cumulating data show that various RNA molecules are able to serve as biomarkers for the diagnosis and prognosis of various diseases, for instance, cancer. In particular, detectable in various bio-fluids, such as serum, saliva and urine, extracellular RNAs (exRNAs) are emerging as non-invasive biomarkers for earlier cancer diagnosis, tumor progression monitor, and prediction of therapy response. In this review, we summarize the latest studies on various types of RNA biomarkers, especially extracellular RNAs, in cancer diagnosis and prognosis, and illustrate several well-known RNA biomarkers of clinical utility. In addition, we describe and discuss general procedures and issues in investigating exRNA biomarkers, and perspectives on utility of exRNAs in precision medicine.
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Affiliation(s)
- Xiaochen Xi
- MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Joint Center for Life Sciences, Center for Plant Biology and Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.
| | - Tianxiao Li
- MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Joint Center for Life Sciences, Center for Plant Biology and Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.
| | - Yiming Huang
- MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Joint Center for Life Sciences, Center for Plant Biology and Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.
| | - Jiahui Sun
- MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Joint Center for Life Sciences, Center for Plant Biology and Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.
| | - Yumin Zhu
- MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Joint Center for Life Sciences, Center for Plant Biology and Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.
| | - Yang Yang
- MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Joint Center for Life Sciences, Center for Plant Biology and Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.
| | - Zhi John Lu
- MOE Key Laboratory of Bioinformatics, Tsinghua-Peking Joint Center for Life Sciences, Center for Plant Biology and Center for Synthetic and Systems Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China.
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Song MH, Kim YR, Bae JH, Shin DH, Lee SY. A cancer/testis antigen, NY-SAR-35, induces EpCAM, CD44, and CD133, and activates ERK in HEK293 cells. Biochem Biophys Res Commun 2017; 484:298-303. [PMID: 28126340 DOI: 10.1016/j.bbrc.2017.01.105] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2017] [Accepted: 01/21/2017] [Indexed: 12/19/2022]
Abstract
The cancer/testis (CT) antigen NY-SAR-35 gene is located on the X chromosome and is aberrantly expressed in various cancers but not in normal tissues, other than testes. Previously, we reported the expression of NY-SAR-35 enhanced cell growth, proliferation, and invasion in HEK293 and cancer cells. To extend understanding of the NY-SAR-35 gene, we used a next generation sequencing (NGS) approach. NY-SAR-35 expression induced growth, proliferation, metastasis, and stemness genes, as indicated by the up-regulations of CXCR4, EpCAM, CD133, and CD44, at the mRNA and protein levels. The expression of NY-SAR-35 in HEK293 cells significantly increased ERK phosphorylation, but not the phosphorylation of AKT. In HEK293/NY-SAR-35 cells, the expressions of pro-apoptotic proteins, including p53, Bax, and p21, were reduced and that of cyclin E was increased. Also, NY-SAR-35 increased the expressions of pluripotency genes (Nanog, Oct-4, and Sox2) and the ability of HEK293 cells to form colonies. Taken together, the present study indicates NY-SAR-35 functions as a CT antigen that triggers oncogenesis and self-renewal.
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Affiliation(s)
- Myung-Ha Song
- Department of Biochemistry, School of Medicine, Pusan National University, Yangsan, 626-870, Gyeongsangnam-do, Republic of Korea
| | - Ye-Rin Kim
- Department of Biochemistry, School of Medicine, Pusan National University, Yangsan, 626-870, Gyeongsangnam-do, Republic of Korea
| | - Jae-Ho Bae
- Department of Biochemistry, School of Medicine, Pusan National University, Yangsan, 626-870, Gyeongsangnam-do, Republic of Korea
| | - Dong-Hoon Shin
- Department of Pathology, School of Medicine, Pusan National University, Yangsan, 626-870, Gyeongsangnam-do, Republic of Korea
| | - Sang-Yull Lee
- Department of Biochemistry, School of Medicine, Pusan National University, Yangsan, 626-870, Gyeongsangnam-do, Republic of Korea.
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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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Gamage TK, Chamley LW, James JL. Stem cell insights into human trophoblast lineage differentiation. Hum Reprod Update 2016; 23:77-103. [PMID: 27591247 DOI: 10.1093/humupd/dmw026] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 06/27/2016] [Accepted: 07/05/2016] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND The human placenta is vital for fetal development, yet little is understood about how it forms successfully to ensure a healthy pregnancy or why this process is inadequate in 1 in 10 pregnancies, leading to miscarriage, intrauterine growth restriction or preeclampsia. Trophoblasts are placenta-specific epithelial cells that maximize nutrient exchange. All trophoblast lineages are thought to arise from a population of trophoblast stem cells (TSCs). However, whilst the isolation of murine TSC has led to an explosion in understanding murine placentation, the isolation of an analogous human TSC has proved more difficult. Consequently, alternative methods of studying human trophoblast lineage development have been employed, including human embryonic stem cells (hESCs), induced pluripotent stem cells (iPS) and transformed cell lines; but what do these proxy models tell us about what is happening during early placental development? OBJECTIVE AND RATIONALE In this systematic review, we evaluate current approaches to understanding human trophoblast lineage development in order to collate and refine these models and inform future approaches aimed at establishing human TSC lines. SEARCH METHODS To ensure all relevant articles were analysed, an unfiltered search of Pubmed, Embase, Scopus and Web of Science was conducted for 25 key terms on the 13th May 2016. In total, 47 313 articles were retrieved and manually filtered based on non-human, non-English, non-full text, non-original article and off-topic subject matter. This resulted in a total of 71 articles deemed relevant for review in this article. OUTCOMES Candidate human TSC populations have been identified in, and isolated from, both the chorionic membrane and villous tissue of the placenta, but further investigation is required to validate these as 'true' human TSCs. Isolating human TSCs from blastocyst trophectoderm has not been successful in humans as it was in mice, although recently the first reported TSC line (USFB6) was isolated from an eight-cell morula. In lieu of human TSC lines, trophoblast-like cells have been induced to differentiate from hESCs and iPS. However, differentiation in these model systems is difficult to control, culture conditions employed are highly variable, and the extent to which they accurately convey the biology of 'true' human TSCs remains unclear, particularly as a consensus has not been met among the scientific community regarding which characteristics a human TSC must possess. WIDER IMPLICATIONS Human TSC models have the potential to revolutionize our understanding of trophoblast differentiation, allowing us to make significant gains in understanding the underlying pathology of pregnancy disorders and to test potential therapeutic interventions on cell function in vitro. In order to do this, a collaborative effort is required to establish the criteria that define a human TSC to confirm the presence of human TSCs in both primary isolates and to determine how accurately trophoblast-like cells derived from current model systems reflect trophoblast from primary tissue. The in vitro systems currently used to model early trophoblast lineage formation have provided insights into early human placental formation but it is unclear whether these trophoblast-like cells are truly representative of primary human trophoblast. Consequently, continued refinement of current models, and standardization of culture protocols is essential to aid our ability to identify, isolate and propagate 'true' human TSCs from primary tissue.
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Affiliation(s)
- Teena Kjb Gamage
- Department of Obstetrics and Gynaecology, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Lawrence W Chamley
- Department of Obstetrics and Gynaecology, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Joanna L James
- Department of Obstetrics and Gynaecology, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
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15
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Nardella M, Guglielmi L, Musa C, Iannetti I, Maresca G, Amendola D, Porru M, Carico E, Sessa G, Camerlingo R, Dominici C, Megiorni F, Milan M, Bearzi C, Rizzi R, Pirozzi G, Leonetti C, Bucci B, Mercanti D, Felsani A, D'Agnano I. Down-regulation of the Lamin A/C in neuroblastoma triggers the expansion of tumor initiating cells. Oncotarget 2016; 6:32821-40. [PMID: 26439802 PMCID: PMC4741732 DOI: 10.18632/oncotarget.5104] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 08/21/2015] [Indexed: 01/30/2023] Open
Abstract
Tumor-initiating cells constitute a population within a tumor mass that shares properties with normal stem cells and is considered responsible for therapy failure in many cancers. We have previously demonstrated that knockdown of the nuclear envelope component Lamin A/C in human neuroblastoma cells inhibits retinoic acid-mediated differentiation and results in a more aggressive phenotype. In addition, Lamin A/C is often lost in advanced tumors and changes in the nuclear envelope composition occur during tumor progression. Based on our previous data and considering that Lamin A/C is expressed in differentiated tissues, we hypothesize that the lack of Lamin A/C could predispose cells toward a stem-like phenotype, thus influencing the development of tumor-initiating cells in neuroblastoma. This paper demonstrates that knockdown of Lamin A/C triggers the development of a tumor-initiating cell population with self-renewing features in human neuroblastoma cells. We also demonstrates that the development of TICs is due to an increased expression of MYCN gene and that in neuroblastoma exists an inverse relationship between LMNA and MYCN expression.
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Affiliation(s)
- Marta Nardella
- Institute of Cell Biology and Neurobiology-CNR, Monterotondo, Rome, Italy
| | - Loredana Guglielmi
- Institute of Cell Biology and Neurobiology-CNR, Monterotondo, Rome, Italy
| | - Carla Musa
- Institute of Cell Biology and Neurobiology-CNR, Monterotondo, Rome, Italy
| | - Ilaria Iannetti
- Institute of Cell Biology and Neurobiology-CNR, Monterotondo, Rome, Italy
| | - Giovanna Maresca
- Institute of Cell Biology and Neurobiology-CNR, Monterotondo, Rome, Italy
| | | | | | - Elisabetta Carico
- UOD Cytopathology, Department of Molecular and Clinical Medicine, Faculty of Medicine and Psychology, Sapienza University, Rome, Italy
| | - Giuseppe Sessa
- Department of Experimental Oncology, National Cancer Institute-IRCCS "Fondazione G. Pascale", Naples, Italy
| | - Rosalba Camerlingo
- Department of Experimental Oncology, National Cancer Institute-IRCCS "Fondazione G. Pascale", Naples, Italy
| | - Carlo Dominici
- Department of Paediatrics and Infantile Neuropsychiatry, Sapienza University, Rome, Italy.,School of Reproductive and Developmental Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Francesca Megiorni
- Department of Paediatrics and Infantile Neuropsychiatry, Sapienza University, Rome, Italy
| | - Marika Milan
- Institute of Cell Biology and Neurobiology-CNR, Monterotondo, Rome, Italy
| | - Claudia Bearzi
- Institute of Cell Biology and Neurobiology-CNR, Monterotondo, Rome, Italy.,I.R.C.C.S Multimedica, Scientific and Technology Pole, Milan, Italy
| | - Roberto Rizzi
- Institute of Cell Biology and Neurobiology-CNR, Monterotondo, Rome, Italy.,I.R.C.C.S Multimedica, Scientific and Technology Pole, Milan, Italy
| | - Giuseppe Pirozzi
- Department of Experimental Oncology, National Cancer Institute-IRCCS "Fondazione G. Pascale", Naples, Italy
| | | | | | - Delio Mercanti
- Institute of Cell Biology and Neurobiology-CNR, Monterotondo, Rome, Italy
| | - Armando Felsani
- Institute of Cell Biology and Neurobiology-CNR, Monterotondo, Rome, Italy
| | - Igea D'Agnano
- Institute of Cell Biology and Neurobiology-CNR, Monterotondo, Rome, Italy
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16
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Sándor S, Jordanidisz T, Schamberger A, Várady G, Erdei Z, Apáti Á, Sarkadi B, Orbán TI. Functional characterization of the ABCG2 5' non-coding exon variants: Stem cell specificity, translation efficiency and the influence of drug selection. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2016; 1859:943-51. [PMID: 27191194 DOI: 10.1016/j.bbagrm.2016.05.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 04/26/2016] [Accepted: 05/13/2016] [Indexed: 12/15/2022]
Abstract
ABCG2 is a multidrug transporter with wide substrate specificity, and is believed to protect several cell types from various xenobiotics and endobiotics. This "guardian" function is important in numerous cell types and tissue barriers but becomes disadvantageous by being responsible for the multidrug resistance phenotype in certain tumor cells. ABCG2 regulation at the protein level has already been extensively studied, however, regulation at the mRNA level, especially the functional role of the various 5' untranslated exon variants (5' UTRs) has been elusive. In the present work, we describe a comprehensive characterization of four ABCG2 mRNA variants with different exon 1 sequences, investigate drug inducibility, stem cell specificity, mRNA stability, and translation efficiency. Although certain variants (E1B and E1C) are considered as "constitutive" mRNA isoforms, we show that chemotoxic drugs significantly alter the expression pattern of distinct ABCG2 mRNA isoforms. When examining human embryonic stem cell lines, we provide evidence that variant E1A has an expression pattern coupled to undifferentiated stem cell stage, as its transcript level is regulated parallel to mRNAs of Oct4 and Nanog pluripotency marker genes. When characterizing the four exon 1 variants we found no significant differences in terms of mRNA stabilities and half-lives of the isoforms. In contrast, variant E1U showed markedly lower translation efficiency both at the total protein level or regarding the functional presence in the plasma membrane. Taken together, these results indicate that the different 5' UTR variants play an important role in cell type specific regulation and fine tuning of ABCG2 expression.
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Affiliation(s)
- Sára Sándor
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Theodora Jordanidisz
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Anita Schamberger
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - György Várady
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Zsuzsa Erdei
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Ágota Apáti
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
| | - Balázs Sarkadi
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary; Department of Biophysics and Radiation Biology, Semmelweis University, MTA-SE Molecular Biophysics Research Group, Budapest, Hungary
| | - Tamás I Orbán
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary.
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17
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Apáti Á, Szebényi K, Erdei Z, Várady G, Orbán TI, Sarkadi B. The importance of drug transporters in human pluripotent stem cells and in early tissue differentiation. Expert Opin Drug Metab Toxicol 2015; 12:77-92. [DOI: 10.1517/17425255.2016.1121382] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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18
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Toh TB, Lee DK, Hou W, Abdullah LN, Nguyen J, Ho D, Chow EKH. Nanodiamond-mitoxantrone complexes enhance drug retention in chemoresistant breast cancer cells. Mol Pharm 2014; 11:2683-91. [PMID: 24867631 PMCID: PMC4216229 DOI: 10.1021/mp5001108] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
![]()
Chemoresistance is a prevalent issue
that accounts for the vast
majority of treatment failure outcomes in metastatic cancer. Among
the mechanisms of resistance that markedly decrease treatment efficacy,
the efflux of drug compounds by ATP-binding cassette (ABC) transporter
proteins can impair adequate drug retention by cancer cells required
for therapeutic cytotoxic activity. Of note, ABC transporters are
capable of effluxing several classes of drugs that are clinical standards,
including the anthracyclines such as doxorubicin, as well as anthracenediones
such as mitoxantrone. To address this challenge, a spectrum of nanomaterials
has been evaluated for improved drug retention and enhanced efficacy.
Nanodiamonds (NDs) are emerging as a promising nanomaterial platform
because they integrate several important properties into a single
agent. These include a uniquely faceted truncated octahedral architecture
that enables potent drug binding and dispersibility in water, scalably
processed ND particles with uniform diameters of approximately 5 nm,
and a demonstrated ability to improve drug tolerance while delaying
tumor growth in multiple preclinical models, among others. This work
describes a ND–mitoxantrone complex that can be rapidly synthesized
and mediates marked improvements in drug efficacy. Comprehensive complex
characterization reveals a complex with favorable drug delivery properties
that is capable of improving drug retention and efficacy in an MDA-MB-231-luc-D3H2LN
(MDA-MB-231) triple negative breast cancer cell line that was lentivirally
transduced for resistance against mitoxantrone. Findings from this
study support the further evaluation of ND–MTX in preclinical
dose escalation and safety studies toward potentially clinical validation.
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Affiliation(s)
- Tan-Boon Toh
- Cancer Science Institute of Singapore, National University of Singapore , Singapore
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19
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Structure and function of BCRP, a broad specificity transporter of xenobiotics and endobiotics. Arch Toxicol 2014; 88:1205-48. [DOI: 10.1007/s00204-014-1224-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 03/06/2014] [Indexed: 12/20/2022]
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20
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Erdei Z, Lőrincz R, Szebényi K, Péntek A, Varga N, Likó I, Várady G, Szakács G, Orbán TI, Sarkadi B, Apáti A. Expression pattern of the human ABC transporters in pluripotent embryonic stem cells and in their derivatives. CYTOMETRY PART B-CLINICAL CYTOMETRY 2014; 86:299-310. [PMID: 24729538 DOI: 10.1002/cyto.b.21168] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 01/27/2014] [Accepted: 02/10/2014] [Indexed: 12/16/2022]
Abstract
BACKGROUND ATP-binding cassette (ABC) transporters have key roles in various physiological functions as well as providing chemical defense and stress tolerance in human tissues. In this study, we have examined the expression pattern of all ABC proteins in pluripotent human embryonic stem cells (hESCs) and in their differentiated progenies. We paid special attention to the cellular expression and localization of multidrug transporter ABC proteins. METHODS Stem cell differentiation was carried out without chemical induction or cell sorting, and specialized cell types were separated mechanically. Cellular features regarding pluripotency and tissue identity, as well as ABC transporter expression were studied by flow cytomtery, immuno-microscopy, and qPCR-based low-density arrays. RESULTS Pluripotent hESCs and differentiated cell types (cardiomyocytes, neuronal cells, and mesenchymal stem cells) were distinguished by morphology, immunostaining markers, and selected mRNA expression patterns. We found that the mRNA expression levels of the 48 human ABC proteins also clearly distinguished the pluripotent and the respective differentiated cell types. When multidrug and lipid transporter ABC protein expression was examined by using well characterized specific antibodies by flow cytometry and confocal microscopy, the protein expression data corresponded well to the mRNA expression results. Moreover, the cellular localization of these important human ABC transporter proteins could be established in the pluripotent and differentiated hESC derived samples. CONCLUSIONS These studies provide valuable information regarding ABC protein expression in human stem cells and their differentiated offspring. The results may also help to obtain further information concerning the specialized cellular functions of selected ABC transporters.
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Affiliation(s)
- Zsuzsa Erdei
- Institute of Molecular Pharmacology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
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21
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Huang FF, Zhang L, Wu DS, Yuan XY, Chen FP, Zeng H, Yu YH, Zhao XL. PTEN regulates BCRP/ABCG2 and the side population through the PI3K/Akt pathway in chronic myeloid leukemia. PLoS One 2014; 9:e88298. [PMID: 24603487 PMCID: PMC3945754 DOI: 10.1371/journal.pone.0088298] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2013] [Accepted: 01/06/2014] [Indexed: 02/05/2023] Open
Abstract
A small population of cancer stem cells named the “side population” (SP) has been demonstrated to be responsible for the persistence of many solid tumors. However, the role of the SP in leukemic pathogenesis remains controversial. The resistance of leukemic stem cells to targeted therapies, such as tyrosine kinase inhibitors (TKIs), results in therapeutic failure or refractory/relapsed disease in chronic myeloid leukemia (CML). The drug pump, ATP-binding cassette sub-family G member 2 (ABCG2), is well known as a specific marker of the SP and could be controlled by several pathways, including the PI3K/Akt pathway. Our data demonstrated that compared with wild-type K562 cells, the higher percentage of ABCG2+ cells corresponded to the higher SP fraction in K562/ABCG2 (ABCG2 overexpressing) and K562/IMR (resistance to imatinib) cells, which exhibited enhanced drug resistance along with downregulated phosphatase and tensin homologue deleted on chromosome -10 (PTEN) and activated phosphorylated-Akt (p-Akt). PTEN and p-Akt downregulation could be abrogated by both the PI3K inhibitor LY294002 and the mTOR inhibitor rapamycin. Moreover, in CML patients in the accelerated phase/blastic phase (AP/BP), increased SP phenotype rather than ABCG2 expression was accompanied by the loss of PTEN protein and the up-regulation of p-Akt expression. These results suggested that the expression of ABCG2 and the SP may be regulated by PTEN through the PI3K/Akt pathway, which would be a potentially effective strategy for targeting CML stem cells.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily G, Member 2
- ATP-Binding Cassette Transporters/genetics
- ATP-Binding Cassette Transporters/metabolism
- Adult
- Aged
- Apoptosis/drug effects
- Blotting, Western
- Cell Survival/drug effects
- Chromones/pharmacology
- Enzyme Inhibitors/pharmacology
- Female
- Humans
- K562 Cells
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/genetics
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Male
- Middle Aged
- Mitoxantrone/pharmacology
- Morpholines/pharmacology
- Neoplasm Proteins/genetics
- Neoplasm Proteins/metabolism
- Neoplastic Stem Cells/metabolism
- Neoplastic Stem Cells/pathology
- PTEN Phosphohydrolase/genetics
- PTEN Phosphohydrolase/metabolism
- Phosphatidylinositol 3-Kinases/metabolism
- Phosphoinositide-3 Kinase Inhibitors
- Proto-Oncogene Proteins c-akt/metabolism
- RNA Interference
- Reverse Transcriptase Polymerase Chain Reaction
- Side-Population Cells/metabolism
- Signal Transduction/drug effects
- Sirolimus/pharmacology
- Young Adult
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Affiliation(s)
- Fang-Fang Huang
- Department of Hematology, Xiang Ya Hospital, Central South University, Changsha, Hunan, China
| | - Li Zhang
- Department of Hematology, West China Hospital, Si Chuan University, Chengdu, Sichuan, China
| | - Deng-Shu Wu
- Department of Hematology, Xiang Ya Hospital, Central South University, Changsha, Hunan, China
| | - Xiao-Yu Yuan
- Department of Hematology, Xiang Ya Hospital, Central South University, Changsha, Hunan, China
| | - Fang-Ping Chen
- Department of Hematology, Xiang Ya Hospital, Central South University, Changsha, Hunan, China
| | - Hui Zeng
- Department of Hematology, Xiang Ya Hospital, Central South University, Changsha, Hunan, China
- * E-mail:
| | - Yan-Hui Yu
- Department of Hematology, Xiang Ya Hospital, Central South University, Changsha, Hunan, China
| | - Xie-Lan Zhao
- Department of Hematology, Xiang Ya Hospital, Central South University, Changsha, Hunan, China
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22
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Hirata N, Nakagawa M, Fujibayashi Y, Yamauchi K, Murata A, Minami I, Tomioka M, Kondo T, Kuo TF, Endo H, Inoue H, Sato SI, Ando S, Kawazoe Y, Aiba K, Nagata K, Kawase E, Chang YT, Suemori H, Eto K, Nakauchi H, Yamanaka S, Nakatsuji N, Ueda K, Uesugi M. A chemical probe that labels human pluripotent stem cells. Cell Rep 2014; 6:1165-1174. [PMID: 24613351 DOI: 10.1016/j.celrep.2014.02.006] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Revised: 01/14/2014] [Accepted: 02/04/2014] [Indexed: 12/22/2022] Open
Abstract
A small-molecule fluorescent probe specific for human pluripotent stem cells would serve as a useful tool for basic cell biology research and stem cell therapy. Screening of fluorescent chemical libraries with human induced pluripotent stem cells (iPSCs) and subsequent evaluation of hit molecules identified a fluorescent compound (Kyoto probe 1 [KP-1]) that selectively labels human pluripotent stem cells. Our analyses indicated that the selectivity results primarily from a distinct expression pattern of ABC transporters in human pluripotent stem cells and from the transporter selectivity of KP-1. Expression of ABCB1 (MDR1) and ABCG2 (BCRP), both of which cause the efflux of KP-1, is repressed in human pluripotent stem cells. Although KP-1, like other pluripotent markers, is not absolutely specific for pluripotent stem cells, the identified chemical probe may be used in conjunction with other reagents.
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Affiliation(s)
- Nao Hirata
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan; Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Masato Nakagawa
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Yuto Fujibayashi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan
| | - Kaori Yamauchi
- Stem Cell Research Center, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606-8507, Japan
| | - Asako Murata
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan; Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Itsunari Minami
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan
| | - Maiko Tomioka
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan
| | - Takayuki Kondo
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Ting-Fang Kuo
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan; Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Hiroshi Endo
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan; Laboratory of Stem Cell Therapy, Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
| | - Haruhisa Inoue
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Shin-Ichi Sato
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan; Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Shin Ando
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan; Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Yoshinori Kawazoe
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Kazuhiro Aiba
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan
| | - Koh Nagata
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan
| | - Eihachiro Kawase
- Stem Cell Research Center, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606-8507, Japan
| | - Young-Tae Chang
- Department of Chemistry & MedChem Program of Life Sciences Institute, National University of Singapore, Singapore 117543, Singapore; Laboratory of Bioimaging Probe Development, Singapore Bioimaging Consortium, Agency for Science, Technology and Research (A(∗)STAR), Singapore 138667, Singapore
| | - Hirofumi Suemori
- Stem Cell Research Center, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606-8507, Japan
| | - Koji Eto
- Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Hiromitsu Nakauchi
- Laboratory of Stem Cell Therapy, Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
| | - Shinya Yamanaka
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan; Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Norio Nakatsuji
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan; Stem Cell Research Center, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606-8507, Japan.
| | - Kazumitsu Ueda
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan; Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan.
| | - Motonari Uesugi
- Institute for Integrated Cell-Material Sciences (WPI-iCeMS), Kyoto University, Kyoto 606-8501, Japan; Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
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23
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Padmanabhan R, Chen KG, Gottesman MM. Lost in Translation: Regulation of ABCG2 Expression in Human Embryonic Stem Cells. ACTA ACUST UNITED AC 2014; 4. [PMID: 25405071 DOI: 10.4172/2157-7633.1000180] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The expression and function of the ATP-binding cassette (ABC) transporter ABCG2 have been studied for two decades in both adult and cancer stem cells. However, this important ABC transporter has not been well characterized in human embryonic stem cells (hESCs). Studies designed to understand the role of ABCG2 in hESCs are still in their initial stages. Several recent reports on expression patterns of the ABCG2 gene in hESCs contain contradictory results at both the mRNA and protein levels. In this review, we provide possible explanations for these discrepancies in ABCG2 expression patterns. We discuss micro-RNA-mediated regulatory roles in controlling ABCG2 mRNA stability and translation, which are associated with hESC pluripotency and differentiation.
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Affiliation(s)
- Raji Padmanabhan
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892
| | - Kevin G Chen
- NIH Stem Cell Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892
| | - Michael M Gottesman
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892
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24
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Huang FF, Wu DS, Zhang L, Yu YH, Yuan XY, Li WJ, Chen XP, Zhao XL, Chen FP, Zeng H. Inactivation of PTEN increases ABCG2 expression and the side population through the PI3K/Akt pathway in adult acute leukemia. Cancer Lett 2013; 336:96-105. [DOI: 10.1016/j.canlet.2013.04.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Revised: 03/28/2013] [Accepted: 04/10/2013] [Indexed: 01/05/2023]
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25
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Hong XX, Carmichael GG. Innate immunity in pluripotent human cells: attenuated response to interferon-β. J Biol Chem 2013; 288:16196-205. [PMID: 23599426 PMCID: PMC3668775 DOI: 10.1074/jbc.m112.435461] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2012] [Revised: 04/18/2013] [Indexed: 12/13/2022] Open
Abstract
Type I interferon (IFN-α/β) binds to cell surface receptors IFNAR1 and IFNAR2 and triggers a signaling cascade that leads to the transcription of hundreds of IFN-stimulated genes. This response is a crucial component in innate immunity in that it establishes an "antiviral state" in cells and protects them against further damage. Previous work demonstrated that, compared with their differentiated counterparts, pluripotent human cells have a much weaker response to cytoplasmic double-stranded RNA (dsRNA) and are only able to produce a minimal amount of IFN-β. We show here that human embryonic stem cells (hESCs) and human induced pluripotent stem cells (hiPSCs) also exhibit an attenuated response to IFN-β. Even though all known type I IFN signaling components are expressed in these cells, STAT1 phosphorylation is greatly diminished upon IFN-β treatment. This attenuated response correlates with a high expression of suppressor of cytokine signaling 1 (SOCS1). Upon differentiation of hESCs into trophoblasts, cells acquire the ability to respond to IFN-β, and this is accompanied by a significant induction of STAT1 phosphorylation as well as a decrease in SOCS1 expression. Furthermore, SOCS1 knockdown in hiPSCs enhances their ability to respond to IFN-β. Taken together, our results suggest that an attenuated cellular response to type I IFNs may be a general feature of pluripotent human cells and that this is associated with high expression of SOCS1.
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Affiliation(s)
- Xiao-Xiao Hong
- From the Department of Genetics and Developmental Biology, University of Connecticut Health Center, Farmington, Connecticut 06032
| | - Gordon G. Carmichael
- From the Department of Genetics and Developmental Biology, University of Connecticut Health Center, Farmington, Connecticut 06032
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Kohara H, Watanabe K, Shintou T, Nomoto T, Okano M, Shirai T, Miyazaki T, Tabata Y. The use of fluorescent indoline dyes for side population analysis. Biomaterials 2013; 34:1024-32. [DOI: 10.1016/j.biomaterials.2012.10.059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Accepted: 10/24/2012] [Indexed: 12/18/2022]
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Padmanabhan R, Chen KG, Gillet JP, Handley M, Mallon BS, Hamilton RS, Park K, Varma S, Mehaffey MG, Robey PG, McKay RD, Gottesman MM. Regulation and expression of the ATP-binding cassette transporter ABCG2 in human embryonic stem cells. Stem Cells 2012; 30:2175-87. [PMID: 22887864 PMCID: PMC3480739 DOI: 10.1002/stem.1195] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The expression and function of several multidrug transporters (including ABCB1 and ABCG2) have been studied in human cancer cells and in mouse and human adult stem cells. However, the expression of ABCG2 in human embryonic stem cells (hESCs) remains unclear. Limited and contradictory results in the literature from two research groups have raised questions regarding its expression and function. In this study, we used quantitative real-time PCR, Northern blots, whole genome RNA sequencing, Western blots, and immunofluorescence microscopy to study ABCG2 expression in hESCs. We found that full-length ABCG2 mRNA transcripts are expressed in undifferentiated hESC lines. However, ABCG2 protein was undetectable even under embryoid body differentiation or cytotoxic drug induction. Moreover, surface ABCG2 protein was coexpressed with the differentiation marker stage-specific embryonic antigen-1 of hESCs, following constant BMP-4 signaling at days 4 and 6. This expression was tightly correlated with the downregulation of two microRNAs (miRNAs) (i.e., hsa-miR-519c and hsa-miR-520h). Transfection of miRNA mimics and inhibitors of these two miRNAs confirmed their direct involvement in the regulation ABCG2 translation. Our findings clarify the controversy regarding the expression of the ABCG2 gene and also provide new insights into translational control of the expression of membrane transporter mRNAs by miRNAs in hESCs.
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Affiliation(s)
- Raji Padmanabhan
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Kevin G. Chen
- NIH Stem Cell Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Jean-Pierre Gillet
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Misty Handley
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Barbara S. Mallon
- NIH Stem Cell Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Rebecca S. Hamilton
- NIH Stem Cell Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Kyeyoon Park
- NIH Stem Cell Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Sudhir Varma
- Bioinformatics and Computational Biosciences Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Michele G. Mehaffey
- SAIC-Frederick, Inc., Frederick National Laboratory for Cancer Research, Frederick, Maryland 21702, USA
| | - Pamela G. Robey
- NIH Stem Cell Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892, USA
- Craniofacial and Skeletal Diseases Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Ronald D.G. McKay
- NIH Stem Cell Unit, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892, USA
- Laboratory of Molecular Biology, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Michael M. Gottesman
- Laboratory of Cell Biology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA
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Erdei Z, Sarkadi B, Brózik A, Szebényi K, Várady G, Makó V, Péntek A, Orbán TI, Apáti Á. Dynamic ABCG2 expression in human embryonic stem cells provides the basis for stress response. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2012; 42:169-79. [PMID: 22851001 DOI: 10.1007/s00249-012-0838-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 06/26/2012] [Accepted: 07/09/2012] [Indexed: 12/21/2022]
Abstract
ABCG2 is a plasma membrane multidrug transporter with an established role in the cancer drug-resistance phenotype. This protein is expressed in a variety of tissues, including several types of stem cell. Although ABCG2 is not essential for life, knock-out mice were found to be hypersensitive to xenobiotics and had reduced levels of the side population of hematopoietic stem cells. Previously we have shown that ABCG2 is present in human embryonic stem cell (hESC) lines, with a heterogeneous expression pattern. In this study we examined this heterogeneity, and investigated whether it is related to stress responses in hESCs. We did not find any difference between expression of pluripotency markers in ABCG2-positive and negative hESCs; however, ABCG2-expressing cells had a higher growth rate after cell separation. We found that some harmful conditions (physical stress, drugs, and UV light exposure) are tolerated much better in the presence of ABCG2 protein. This property can be explained by the transporter function which eliminates potential toxic metabolites accumulated during stress conditions. In contrast, mild oxidative stress in hESCs caused rapid internalization of ABCG2, indicating that some environmental factors may induce removal of this transporter from the plasma membrane. On the basis of these results we suggest that a dynamic balance of ABCG2 expression at the population level has the advantage of enabling prompt response to changes in the cellular environment. Such actively maintained heterogeneity might be of evolutionary benefit in protecting special cell types, including pluripotent stem cells.
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Affiliation(s)
- Zsuzsa Erdei
- Membrane Research Group of the Hungarian Academy of Sciences, Semmelweis, University and National Blood Center, Diószegi u. 64., 1113, Budapest, Hungary
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Natarajan K, Xie Y, Baer MR, Ross DD. Role of breast cancer resistance protein (BCRP/ABCG2) in cancer drug resistance. Biochem Pharmacol 2012; 83:1084-103. [PMID: 22248732 PMCID: PMC3307098 DOI: 10.1016/j.bcp.2012.01.002] [Citation(s) in RCA: 296] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Revised: 01/02/2012] [Accepted: 01/03/2012] [Indexed: 01/16/2023]
Abstract
Since cloning of the ATP-binding cassette (ABC) family member breast cancer resistance protein (BCRP/ABCG2) and its characterization as a multidrug resistance efflux transporter in 1998, BCRP has been the subject of more than two thousand scholarly articles. In normal tissues, BCRP functions as a defense mechanism against toxins and xenobiotics, with expression in the gut, bile canaliculi, placenta, blood-testis and blood-brain barriers facilitating excretion and limiting absorption of potentially toxic substrate molecules, including many cancer chemotherapeutic drugs. BCRP also plays a key role in heme and folate homeostasis, which may help normal cells survive under conditions of hypoxia. BCRP expression appears to be a characteristic of certain normal tissue stem cells termed "side population cells," which are identified on flow cytometric analysis by their ability to exclude Hoechst 33342, a BCRP substrate fluorescent dye. Hence, BCRP expression may contribute to the natural resistance and longevity of these normal stem cells. Malignant tissues can exploit the properties of BCRP to survive hypoxia and to evade exposure to chemotherapeutic drugs. Evidence is mounting that many cancers display subpopulations of stem cells that are responsible for tumor self-renewal. Such stem cells frequently manifest the "side population" phenotype characterized by expression of BCRP and other ABC transporters. Along with other factors, these transporters may contribute to the inherent resistance of these neoplasms and their failure to be cured.
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Affiliation(s)
| | - Yi Xie
- University of Maryland Greenebaum Cancer Center
| | - Maria R. Baer
- University of Maryland Greenebaum Cancer Center
- Department of Medicine, University of Maryland School of Medicine
| | - Douglas D. Ross
- University of Maryland Greenebaum Cancer Center
- Department of Medicine, University of Maryland School of Medicine
- Departments of Pathology, and Pharmacology & Experimental Therapeutics, University of Maryland, School of Medicine
- Staff Physician, Baltimore VA Medical Center
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30
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Sison-Young RLC, Kia R, Heslop J, Kelly L, Rowe C, Cross MJ, Kitteringham NR, Hanley N, Park BK, Goldring CEP. Human pluripotent stem cells for modeling toxicity. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2012; 63:207-256. [PMID: 22776643 DOI: 10.1016/b978-0-12-398339-8.00006-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The development of xenobiotics, driven by the demand for therapeutic, domestic and industrial uses continues to grow. However, along with this increasing demand is the risk of xenobiotic-induced toxicity. Currently, safety screening of xenobiotics uses a plethora of animal and in vitro model systems which have over the decades proven useful during compound development and for application in mechanistic studies of xenobiotic-induced toxicity. However, these assessments have proven to be animal-intensive and costly. More importantly, the prevalence of xenobiotic-induced toxicity is still significantly high, causing patient morbidity and mortality, and a costly impediment during drug development. This suggests that the current models for drug safety screening are not reliable in toxicity prediction, and the results not easily translatable to the clinic due to insensitive assays that do not recapitulate fully the complex phenotype of a functional cell type in vivo. Recent advances in the field of stem cell research have potentially allowed for a readily available source of metabolically competent cells for toxicity studies, derived using human pluripotent stem cells harnessed from embryos or reprogrammed from mature somatic cells. Pluripotent stem cell-derived cell types also allow for potential disease modeling in vitro for the purposes of drug toxicology and safety pharmacology, making this model possibly more predictive of drug toxicity compared with existing models. This article will review the advances and challenges of using human pluripotent stem cells for modeling metabolism and toxicity, and offer some perspectives as to where its future may lie.
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Affiliation(s)
- R L C Sison-Young
- MRC Centre for Drug Safety Science, Department of Molecular and Clinical Pharmacology, University of Liverpool, Liverpool, United Kingdom
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31
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Broadley KWR, Hunn MK, Farrand KJ, Price KM, Grasso C, Miller RJ, Hermans IF, McConnell MJ. Side population is not necessary or sufficient for a cancer stem cell phenotype in glioblastoma multiforme. Stem Cells 2011; 29:452-61. [PMID: 21425408 DOI: 10.1002/stem.582] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
There is strong evidence for the existence of cancer stem cells (CSCs) in the aggressive brain tumor glioblastoma multiforme (GBM). These cells have stem-like self-renewal activity and increased tumor initiation capacity and are believed to be responsible for recurrence due to their resistance to therapy. Several techniques have been used to enrich for CSC, including growth in serum-free defined media to induce sphere formation, and isolation of a stem-like cell using exclusion of the fluorescent dye Hoechst 33342, the side population (SP). We show that sphere formation in GBM cell lines and primary GBM cells enriches for a CSC-like phenotype of increased self-renewal gene expression in vitro and increased tumor initiation in vivo. However, the SP was absent from all sphere cultures. Direct isolation of the SP from the GBM lines did not enrich for stem-like activity in vitro, and tumor-initiating activity was lower in sorted SP compared with non-SP and parental cells. Transient exposure to doxorubicin enhanced both CSC and SP frequency. However, doxorubicin treatment altered the cytometric profile and obscured the SP demonstrating the difficulty of identifying SP in cells under stress. Doxorubicin-exposed cells showed a transient increase in SP, but the doxorubicin-SP cells were still not enriched for a stem-like self-renewal phenotype. These data demonstrate that the GBM SP does not necessarily contribute to self-renewal or tumor initiation, key properties of a CSC, and we advise against using SP to enumerate or isolate CSC.
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Affiliation(s)
- Kate W R Broadley
- Cell Survival Group, Malaghan Institute of Medical Research, Wellington, New Zealand
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Yang L, Duff MO, Graveley BR, Carmichael GG, Chen LL. Genomewide characterization of non-polyadenylated RNAs. Genome Biol 2011; 12:R16. [PMID: 21324177 PMCID: PMC3188798 DOI: 10.1186/gb-2011-12-2-r16] [Citation(s) in RCA: 311] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2010] [Revised: 01/19/2011] [Accepted: 02/16/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND RNAs can be physically classified into poly(A)+ or poly(A)- transcripts according to the presence or absence of a poly(A) tail at their 3' ends. Current deep sequencing approaches largely depend on the enrichment of transcripts with a poly(A) tail, and therefore offer little insight into the nature and expression of transcripts that lack poly(A) tails. RESULTS We have used deep sequencing to explore the repertoire of both poly(A)+ and poly(A)- RNAs from HeLa cells and H9 human embryonic stem cells (hESCs). Using stringent criteria, we found that while the majority of transcripts are poly(A)+, a significant portion of transcripts are either poly(A)- or bimorphic, being found in both the poly(A)+ and poly(A)- populations. Further analyses revealed that many mRNAs may not contain classical long poly(A) tails and such messages are overrepresented in specific functional categories. In addition, we surprisingly found that a few excised introns accumulate in cells and thus constitute a new class of non-polyadenylated long non-coding RNAs. Finally, we have identified a specific subset of poly(A)- histone mRNAs, including two histone H1 variants, that are expressed in undifferentiated hESCs and are rapidly diminished upon differentiation; further, these same histone genes are induced upon reprogramming of fibroblasts to induced pluripotent stem cells. CONCLUSIONS We offer a rich source of data that allows a deeper exploration of the poly(A)- landscape of the eukaryotic transcriptome. The approach we present here also applies to the analysis of the poly(A)- transcriptomes of other organisms.
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Affiliation(s)
- Li Yang
- Department of Genetics and Developmental Biology, University of Connecticut Stem Cell Institute, University of Connecticut Health Center, 263 Farmington Ave, Farmington, CT 06030-6403, USA
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33
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Critical Appraisal of the Side Population Assay in Stem Cell and Cancer Stem Cell Research. Cell Stem Cell 2011; 8:136-47. [DOI: 10.1016/j.stem.2011.01.007] [Citation(s) in RCA: 253] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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34
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Tang L, Bergevoet SM, Gilissen C, de Witte T, Jansen JH, van der Reijden BA, Raymakers RAP. Hematopoietic stem cells exhibit a specific ABC transporter gene expression profile clearly distinct from other stem cells. BMC Pharmacol 2010; 10:12. [PMID: 20836839 PMCID: PMC2945345 DOI: 10.1186/1471-2210-10-12] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2010] [Accepted: 09/13/2010] [Indexed: 12/16/2022] Open
Abstract
Background ATP-binding cassette (ABC) transporters protect cells against unrelated (toxic) substances by pumping them across cell membranes. Earlier we showed that many ABC transporters are highly expressed in hematopoietic stem cells (HSCs) compared to more committed progenitor cells. The ABC transporter expression signature may guarantee lifelong protection of HSCs but may also preserve stem cell integrity by extrusion of agents that trigger their differentiation. Here we have studied whether non-hematopoietic stem cells (non-HSCs) exhibit a similar ABC transporter expression signature as HSCs. Results ABC transporter expression profiles were determined in non-hematopoietic stem cells (non-HSCs) from embryonic, neonatal and adult origin as well as in various mature blood cell types. Over 11,000 individual ABC transporter expression values were generated by Taqman Low Density Arrays (TLDA) to obtain a sensitivity comparable with quantitative real-time polymerase chain reactions. We found that the vast majority of transporters are significantly higher expressed in HSCs compared to non-HSCs. Furthermore, regardless their origin, non-HSCs exhibited strikingly similar ABC transporter expression profiles that were distinct from those in HSCs. Yet, sets of transporters characteristic for different stem cell types could be identified, suggesting restricted functions in stem cell physiology. Remarkably, in HSCs we could not pinpoint any single transporter expressed at an evidently elevated level when compared to all the mature blood cell types studied. Conclusions These findings challenge the concept that individual ABC transporters are implicated in maintaining stem cell integrity. Instead, a distinct ABC transporter expression signature may be essential for stem cell function. The high expression of specific transporters in non-HSCs and mature blood cells suggests a specialized, cell type dependent function and warrants further functional experiments to determine their exact roles in cellular (patho)physiology.
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Affiliation(s)
- Leilei Tang
- Department of Laboratory Medicine, Laboratory of Hematology, Radboud University Nijmegen Medical Centre/Nijmegen Centre for Molecular Life Sciences, Geert Grooteplein 8, 6525GA Nijmegen, The Netherlands
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Chen LL, Yang L, Carmichael GG. Molecular basis for an attenuated cytoplasmic dsRNA response in human embryonic stem cells. Cell Cycle 2010; 9:3552-64. [PMID: 20814227 PMCID: PMC3047619 DOI: 10.4161/cc.9.17.12792] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2010] [Revised: 06/24/2010] [Accepted: 06/24/2010] [Indexed: 12/12/2022] Open
Abstract
The introduction of double stranded RNA (dsRNA) into the cytoplasm of mammalian cells usually leads to a potent antiviral response resulting in the rapid induction of interferon beta (IFNβ). This response can be mediated by a number of dsRNA sensors, including TLR3, MDA5, RIG-I and PKR. We show here that pluripotent human cells (human embryonic stem (hES) cells and induced pluripotent (iPS) cells) do not induce interferon in response to cytoplasmic dsRNA, and we have used a variety of approaches to learn the underlying basis for this phenomenon. Two major cytoplasmic dsRNA sensors, TLR3 and MDA5, are not expressed in hES cells and iPS cells. PKR is expressed in hES cells, but is not activated by transfected dsRNA. In addition, RIG-I is expressed, but fails to respond to dsRNA because its signaling adapter, MITA/STING, is not expressed. Finally, the interferon-inducible RNAse L and oligoadenylate synthetase enzymes are also expressed at very low levels. Upon differentiation of hES cells into trophoblasts, cells acquire the ability to respond to dsRNA and this correlates with a significant induction of expression of TLR3 and its adaptor protein TICAM-1/TRIF. Taken together, our results reveal that the lack of an interferon response may be a general characteristic of pluripotency and that this results from the systematic downregulation of a number of genes involved in cytoplasmic dsRNA signaling.
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Affiliation(s)
- Ling-Ling Chen
- Department of Genetics and Developmental Biology, University of Connecticut Stem Cell Institute, Farmington, CT, USA.
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Zeng H, Guo M, Martins-Taylor K, Wang X, Zhang Z, Park JW, Zhan S, Kronenberg MS, Lichtler A, Liu HX, Chen FP, Yue L, Li XJ, Xu RH. Specification of region-specific neurons including forebrain glutamatergic neurons from human induced pluripotent stem cells. PLoS One 2010; 5:e11853. [PMID: 20686615 PMCID: PMC2912324 DOI: 10.1371/journal.pone.0011853] [Citation(s) in RCA: 162] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2010] [Accepted: 07/07/2010] [Indexed: 12/23/2022] Open
Abstract
Background Directed differentiation of human induced pluripotent stem cells (hiPSC) into functional, region-specific neural cells is a key step to realizing their therapeutic promise to treat various neural disorders, which awaits detailed elucidation. Methodology/Principal Findings We analyzed neural differentiation from various hiPSC lines generated by others and ourselves. Although heterogeneity in efficiency of neuroepithelial (NE) cell differentiation was observed among different hiPSC lines, the NE differentiation process resembles that from human embryonic stem cells (hESC) in morphology, timing, transcriptional profile, and requirement for FGF signaling. NE cells differentiated from hiPSC, like those from hESC, can also form rostral phenotypes by default, and form the midbrain or spinal progenitors upon caudalization by morphogens. The rostrocaudal neural progenitors can further mature to develop forebrain glutamatergic projection neurons, midbrain dopaminergic neurons, and spinal motor neurons, respectively. Typical ion channels and action potentials were recorded in the hiPSC-derived neurons. Conclusions/Significance Our results demonstrate that hiPSC, regardless of how they were derived, can differentiate into a spectrum of rostrocaudal neurons with functionality, which supports the considerable value of hiPSC for study and treatment of patient-specific neural disorders.
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Affiliation(s)
- Hui Zeng
- Department of Genetics and Developmental Biology, University of Connecticut Stem Cell Institute, University of Connecticut Health Center, Farmington, Connecticut, United States of America
- Department of Hematology, Central South University Xiang-Ya Hospital, Changsha, Hunan, China
| | - Min Guo
- Department of Neuroscience, University of Connecticut Stem Cell Institute, University of Connecticut Health Center, Farmington, Connecticut, United States of America
- Department of Geriatrics, Central South University Xiang-Ya Hospital, Changsha, Hunan, China
| | - Kristen Martins-Taylor
- Department of Genetics and Developmental Biology, University of Connecticut Stem Cell Institute, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Xiaofang Wang
- Department of Genetics and Developmental Biology, University of Connecticut Stem Cell Institute, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Zheng Zhang
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Jung Woo Park
- Department of Genetics and Developmental Biology, University of Connecticut Stem Cell Institute, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Shuning Zhan
- Department of Regenerative Sciences, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Mark S. Kronenberg
- Department of Regenerative Sciences, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Alexander Lichtler
- Department of Regenerative Sciences, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Hui-Xia Liu
- Department of Geriatrics, Central South University Xiang-Ya Hospital, Changsha, Hunan, China
| | - Fang-Ping Chen
- Department of Hematology, Central South University Xiang-Ya Hospital, Changsha, Hunan, China
| | - Lixia Yue
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut, United States of America
| | - Xue-Jun Li
- Department of Neuroscience, University of Connecticut Stem Cell Institute, University of Connecticut Health Center, Farmington, Connecticut, United States of America
- * E-mail: (RHX); (XJL)
| | - Ren-He Xu
- Department of Genetics and Developmental Biology, University of Connecticut Stem Cell Institute, University of Connecticut Health Center, Farmington, Connecticut, United States of America
- * E-mail: (RHX); (XJL)
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Li Y, Zeng H, Xu RH, Liu B, Li Z. Vaccination with human pluripotent stem cells generates a broad spectrum of immunological and clinical responses against colon cancer. Stem Cells 2010; 27:3103-11. [PMID: 19816950 DOI: 10.1002/stem.234] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The history of immunizing with embryonic materials to generate an antitumor immune response dates back to a century ago. The premise is that cancer cells share the expression of oncofetal antigens with embryonic materials and that the immune response against these antigens in the embryonic tissues is cross-protective against cancer. However, such a practice has never advanced beyond experimental animal settings, because of lack of uniformed source tissues and ethical challenges. With the availability of well-characterized human pluripotent stem cells, it is now possible to ask whether tumor protective immunity could indeed be elicited with stem cells. Herein, we investigated whether vaccination with defined human embryonic stem cells (hESCs) or induced pluripotent stem (iPS) cells was effective against a colon carcinoma. We discovered that vaccination of mice with hESC line H9 generated consistent cellular and humoral immune responses against CT26 colon carcinoma. Protection correlated strongly with the expansion of tumor-responsive and interferon-gamma-producing cells and the profound loss of CD11b(+)Gr-1(+) myeloid-derived suppressor cells in the spleen. No evidence of autoimmunity was observed. We also compared the immunogenicity against colon cancer between a hESC line CT2 and an iPS cell line TZ1 that were generated in the same stem cell facility. We found that the iPS cell line was inferior to the hESC line in conferring tumor protection, suggesting that there is heterogeneity of expression of oncofetal antigens by hESCs and iPS cells. We conclude that the hESC-based vaccine is a promising modality for immunotherapy of cancer.
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Affiliation(s)
- Yi Li
- Department of Immunology, University of Connecticut School of Medicine, Farmington, Connecticut 06030-1601, USA
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Sarkadi B, Orbán TI, Szakács G, Várady G, Schamberger A, Erdei Z, Szebényi K, Homolya L, Apáti A. Evaluation of ABCG2 expression in human embryonic stem cells: crossing the same river twice? Stem Cells 2010; 28:174-6. [PMID: 19924769 DOI: 10.1002/stem.262] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Kallestad KM, McLoon LK. Defining the heterogeneity of skeletal muscle-derived side and main population cells isolated immediately ex vivo. J Cell Physiol 2010; 222:676-84. [PMID: 20020527 DOI: 10.1002/jcp.21989] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Myoblast transfer therapy for Duchenne muscular dystrophy (DMD) largely fails due to cell death and inability of transplanted cells to engraft in diseased muscles. One method attempting to enrich for cell subpopulations is the Hoechst 33342 dye exclusion assay, yielding a side population (SP) thought to be progenitor enriched and a main population (MP). However, in vitro and transplant studies yielded inconsistent results relative to downstream progeny. Cell surface markers expressed by skeletal muscle-derived MP and SP cells have not been fully characterized directly ex vivo. Using flow cytometry, MP and SP cells were characterized based on their expression of several well-accepted progenitor cell antigens. Both the MP and SP populations are heterogeneous and overlapping in the cells they contain. The percentages of cells in each population vary with species and specific muscle examined. MP and SP populations contain both satellite and multipotent progenitor cells, based on expression of CD34, Sca-1, Pax7, and M-cadherin. Thus, isolation using this procedure cannot be used to predict downstream differentiation outcomes, and explains the conflicting literature on these cells. Hoechst dye also results in significant mortality of sorted cells. As defined subpopulations are easily obtained using flow cytometry, sorting immediately ex vivo based on accepted myogenic precursor cell markers will yield superior results in terms of cell homogeneity for transplantation therapy.
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Affiliation(s)
- Kristen M Kallestad
- Department of Ophthalmology and Neuroscience, University of Minnesota, Minneapolis, Minnesota 55455, USA
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Wang X, Lin G, Martins-Taylor K, Zeng H, Xu RH. Inhibition of caspase-mediated anoikis is critical for basic fibroblast growth factor-sustained culture of human pluripotent stem cells. J Biol Chem 2009; 284:34054-64. [PMID: 19828453 DOI: 10.1074/jbc.m109.052290] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Apoptosis and proliferation are two dynamically and tightly regulated processes that together maintain the homeostasis of renewable tissues. Anoikis is a subtype of apoptosis induced by detachment of adherent cells from the extracellular matrix. By using the defined mTeSR1 medium and collecting freshly detached cells, we found here that human pluripotent stem (PS) cells including embryonic stem (ES) cells and induced pluripotent stem cells are subject to constant anoikis in culture, which is escalated in the absence of basic fibroblast growth factor (bFGF). Withdrawal of bFGF also promotes apoptosis and differentiation of the remaining adherent cells without affecting their cell cycle progression. Insulin-like growth factor 2 (IGF2) has previously been reported to act downstream of FGF signaling to support self-renewal of human ES cells. However, we found that IGF2 cannot substitute bFGF in the TeSR1-supported culture, although endogenous IGF signaling is required to sustain self-renewal of human ES cells. On the other hand, all of the bFGF withdrawal effects observed here can be markedly prevented by the caspase inhibitor z-VAD-FMK. We further demonstrated that the bFGF-repressed anoikis is dependent on activation of ERK and AKT and associated with inhibition of Bcl-2-interacting mediator of cell death and the caspase-ROCK1-myosin signaling. Anoikis is independent of pre-detachment apoptosis and differentiation of the cells. Because previous studies of human PS cells have been focused on attached cells, our findings revealed a neglected role of bFGF in sustaining self-renewal of human PS cells: preventing them from anoikis via inhibition of caspase activation.
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Affiliation(s)
- Xiaofang Wang
- University of Connecticut Stem Cell Institute, Department of Genetics and Developmental Biology, University of Connecticut Health Center, Farmington, Connecticut 06030, USA
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