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Wang Z, Wang P, Zhang J, Gong H, Zhang X, Song J, Nie L, Peng Y, Li Y, Peng H, Cui Y, Li H, Hu B, Mi J, Liang L, Liu H, Zhang J, Ye M, Yazdanbakhsh K, Mohandas N, An X, Han X, Liu J. The novel GATA1-interacting protein HES6 is an essential transcriptional cofactor for human erythropoiesis. Nucleic Acids Res 2023; 51:4774-4790. [PMID: 36929421 PMCID: PMC10250228 DOI: 10.1093/nar/gkad167] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 02/21/2023] [Accepted: 03/15/2023] [Indexed: 03/18/2023] Open
Abstract
Normal erythropoiesis requires the precise regulation of gene expression patterns, and transcription cofactors play a vital role in this process. Deregulation of cofactors has emerged as a key mechanism contributing to erythroid disorders. Through gene expression profiling, we found HES6 as an abundant cofactor expressed at gene level during human erythropoiesis. HES6 physically interacted with GATA1 and influenced the interaction of GATA1 with FOG1. Knockdown of HES6 impaired human erythropoiesis by decreasing GATA1 expression. Chromatin immunoprecipitation and RNA sequencing revealed a rich set of HES6- and GATA1-co-regulated genes involved in erythroid-related pathways. We also discovered a positive feedback loop composed of HES6, GATA1 and STAT1 in the regulation of erythropoiesis. Notably, erythropoietin (EPO) stimulation led to up-regulation of these loop components. Increased expression levels of loop components were observed in CD34+ cells of polycythemia vera patients. Interference by either HES6 knockdown or inhibition of STAT1 activity suppressed proliferation of erythroid cells with the JAK2V617F mutation. We further explored the impact of HES6 on polycythemia vera phenotypes in mice. The identification of the HES6-GATA1 regulatory loop and its regulation by EPO provides novel insights into human erythropoiesis regulated by EPO/EPOR and a potential therapeutic target for the management of polycythemia vera.
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Affiliation(s)
- Zi Wang
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
| | - Pan Wang
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
| | - Jieying Zhang
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
- Basic Medical Institute; Hongqiao International Institute of Medicine, Tongren Hospital; Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Han Gong
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
| | - Xuchao Zhang
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
| | - Jianhui Song
- Xiangya Hospital, Central South University, Changsha 410008, China
| | - Ling Nie
- Xiangya Hospital, Central South University, Changsha 410008, China
| | - Yuanliang Peng
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
| | - Yanan Li
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
| | - Hongling Peng
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
| | - Yajuan Cui
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
| | - Heng Li
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
| | - Bin Hu
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
| | - Jun Mi
- Basic Medical Institute; Hongqiao International Institute of Medicine, Tongren Hospital; Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - Long Liang
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
| | - Hong Liu
- Xiangya Hospital, Central South University, Changsha 410008, China
| | - Ji Zhang
- Department of Clinical Laboratory, the First Affiliated Hospital, University of South China, Hengyang 421001, China
| | - Mao Ye
- Molecular Science and Biomedicine Laboratory, State Key Laboratory for Chemo/Biosensing and Chemometrics; College of Biology; College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
| | | | - Narla Mohandas
- Red Cell Physiology Laboratory, NY Blood Center, NY 10065, USA
| | - Xiuli An
- Laboratory of Membrane Biology, NY Blood Center, NY 10065, USA
| | - Xu Han
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
| | - Jing Liu
- Department of Hematology, The Second Xiangya Hospital of Central South University; Molecular Biology Research Center, Center for Medical Genetics, School of Life Sciences; Hunan Province Key Laboratory of Basic and Applied Hematology, Central South University, Changsha 410011, China
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Adams KL, Riparini G, Banerjee P, Breur M, Bugiani M, Gallo V. Endothelin-1 signaling maintains glial progenitor proliferation in the postnatal subventricular zone. Nat Commun 2020; 11:2138. [PMID: 32358570 PMCID: PMC7195367 DOI: 10.1038/s41467-020-16028-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 04/06/2020] [Indexed: 12/18/2022] Open
Abstract
Signaling molecules that regulate neurodevelopmental processes in the early postnatal subventricular zone (SVZ) are critical for proper brain development yet remain poorly characterized. Here, we report that Endothelin-1 (ET-1), a molecular component of the postnatal SVZ, promotes radial glial cell maintenance and proliferation in an autocrine manner via Notch signaling. Loss of ET-1 signaling increases neurogenesis and reduces oligodendrocyte progenitor cell proliferation (OPC) in the developing SVZ, thereby altering cellular output of the stem cell niche. We also show that ET-1 is required for increased neural stem cell and OPC proliferation in the adult mouse SVZ following demyelination. Lastly, high levels of ET-1 in the SVZ of patients with Cathepsin A-related arteriopathy with strokes and leukoencephalopathy correlate with an increased number of SVZ OPCs, suggesting ET-1's role as a regulator of glial progenitor proliferation may be conserved in humans. ET-1 signaling therefore presents a potential new therapeutic target for promoting SVZ-mediated cellular repair.
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Affiliation(s)
- Katrina L Adams
- Center for Neuroscience Research, Children's National Research Institute, Children's National Hospital, Washington, DC, 20010, USA
| | - Giulia Riparini
- Center for Neuroscience Research, Children's National Research Institute, Children's National Hospital, Washington, DC, 20010, USA
- Department of Biomolecular Sciences, University of Urbino "Carlo Bo", Urbino, Italy
| | - Payal Banerjee
- Children's National Research Institute Bioinformatics Unit, Children's National Hospital, Washington, DC, 20010, USA
| | - Marjolein Breur
- Department of Child Neurology, VU University Medical Center, Amsterdam, The Netherlands
| | - Marianna Bugiani
- Department of Pathology, VU University Medical Center, Amsterdam, The Netherlands
| | - Vittorio Gallo
- Center for Neuroscience Research, Children's National Research Institute, Children's National Hospital, Washington, DC, 20010, USA.
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3
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Nam SM, Kim YN, Kim JW, Kyeong DS, Lee SH, Son Y, Shin JH, Kim J, Yi SS, Yoon YS, Seong JK. Hairy and Enhancer of Split 6 (Hes6) Deficiency in Mouse Impairs Neuroblast Differentiation in Dentate Gyrus Without Affecting Cell Proliferation and Integration into Mature Neurons. Cell Mol Neurobiol 2016; 36:57-67. [PMID: 26105991 DOI: 10.1007/s10571-015-0220-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Accepted: 06/01/2015] [Indexed: 11/29/2022]
Abstract
Hes6 is a member of the hairy-enhancer of split homolog (Hes) family of transcription factors and interacts with other Hes family genes. During development, Hes genes are expressed in neural stem cells and progenitor cells. However, the role of Hes6 in adult hippocampal neurogenesis remains unclear. We therefore investigated the effects of Hes6 on adult hippocampal neurogenesis, by comparing Hes6 knockout and wild-type mice. To this end, we immunostained for markers of neural stem cells and progenitor cells (nestin), proliferating cells (Ki67), post-mitotic neuroblasts and immature neurons (doublecortin, DCX), mature neuronal cells (NeuN), and astrocyte (S100β). We also injected 5-bromo-2'-deoxyuridine (BrdU) to trace the fate of mitotic cells. Nestin- and Ki67-positive proliferating cells did now show any significant differences between wild and knockout groups. Hes6 knockout negatively affects neuroblast differentiation based on DCX immunohistochemistry. On the contrary, the ratio of the BrdU and NeuN double-positive cells did not show any significance, even though it was slightly higher in the knockout group. These results suggest that Hes6 is involved in the regulation of neuroblast differentiation during adult neurogenesis, but does not influence integration into mature neurons.
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Affiliation(s)
- Sung Min Nam
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Seoul National University, Seoul, 151-742, South Korea
- BK21 PLUS Program for Creative Veterinary Science Research and Research Institute for Veterinary Science, Seoul National University, Seoul, 151-742, South Korea
- KMPC (Korea Mouse Phenotyping Center), Seoul National University, Seoul, 151-742, South Korea
| | - Yo Na Kim
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Seoul National University, Seoul, 151-742, South Korea
- BK21 PLUS Program for Creative Veterinary Science Research and Research Institute for Veterinary Science, Seoul National University, Seoul, 151-742, South Korea
- KMPC (Korea Mouse Phenotyping Center), Seoul National University, Seoul, 151-742, South Korea
| | - Jong Whi Kim
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Seoul National University, Seoul, 151-742, South Korea
- BK21 PLUS Program for Creative Veterinary Science Research and Research Institute for Veterinary Science, Seoul National University, Seoul, 151-742, South Korea
- KMPC (Korea Mouse Phenotyping Center), Seoul National University, Seoul, 151-742, South Korea
| | - Dong Soo Kyeong
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Seoul National University, Seoul, 151-742, South Korea
- BK21 PLUS Program for Creative Veterinary Science Research and Research Institute for Veterinary Science, Seoul National University, Seoul, 151-742, South Korea
- KMPC (Korea Mouse Phenotyping Center), Seoul National University, Seoul, 151-742, South Korea
| | - Seo Hyun Lee
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Seoul National University, Seoul, 151-742, South Korea
- BK21 PLUS Program for Creative Veterinary Science Research and Research Institute for Veterinary Science, Seoul National University, Seoul, 151-742, South Korea
- KMPC (Korea Mouse Phenotyping Center), Seoul National University, Seoul, 151-742, South Korea
| | - Yeri Son
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Seoul National University, Seoul, 151-742, South Korea
- BK21 PLUS Program for Creative Veterinary Science Research and Research Institute for Veterinary Science, Seoul National University, Seoul, 151-742, South Korea
- KMPC (Korea Mouse Phenotyping Center), Seoul National University, Seoul, 151-742, South Korea
| | - Jae Hoon Shin
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Seoul National University, Seoul, 151-742, South Korea
- BK21 PLUS Program for Creative Veterinary Science Research and Research Institute for Veterinary Science, Seoul National University, Seoul, 151-742, South Korea
- KMPC (Korea Mouse Phenotyping Center), Seoul National University, Seoul, 151-742, South Korea
| | - Jaesang Kim
- Department of Life Sciences and Ewha Research Center for Systems Biology, Ewha Womans University, Seoul, 120-750, South Korea
| | - Sun Shin Yi
- Department of Biomedical Laboratory Science, College of Biomedical Sciences, Soonchunhyang University, Asan, 336-745, South Korea
| | - Yeo Sung Yoon
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Seoul National University, Seoul, 151-742, South Korea.
- BK21 PLUS Program for Creative Veterinary Science Research and Research Institute for Veterinary Science, Seoul National University, Seoul, 151-742, South Korea.
- KMPC (Korea Mouse Phenotyping Center), Seoul National University, Seoul, 151-742, South Korea.
| | - Je Kyung Seong
- Department of Anatomy and Cell Biology, College of Veterinary Medicine, Seoul National University, Seoul, 151-742, South Korea.
- BK21 PLUS Program for Creative Veterinary Science Research and Research Institute for Veterinary Science, Seoul National University, Seoul, 151-742, South Korea.
- KMPC (Korea Mouse Phenotyping Center), Seoul National University, Seoul, 151-742, South Korea.
- Interdisciplinary Program for Bioinformatics, Program for Cancer Biology and BIO-MAX Institute, Seoul National University, Seoul, 151-742, South Korea.
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Omega-3 polyunsaturated Fatty acids enhance neuronal differentiation in cultured rat neural stem cells. Stem Cells Int 2013; 2013:490476. [PMID: 23365582 PMCID: PMC3556893 DOI: 10.1155/2013/490476] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 11/30/2012] [Accepted: 12/03/2012] [Indexed: 01/24/2023] Open
Abstract
Polyunsaturated fatty acids (PUFAs) can induce neurogenesis and recovery from brain diseases. However, the exact mechanisms of the beneficial effects of PUFAs have not been conclusively described. We recently reported that docosahexaenoic acid (DHA) induced neuronal differentiation by decreasing Hes1 expression and increasing p27kip1 expression, which causes cell cycle arrest in neural stem cells (NSCs). In the present study, we examined the effect of eicosapentaenoic acid (EPA) and arachidonic acid (AA) on differentiation, expression of basic helix-loop-helix transcription factors (Hes1, Hes6, and NeuroD), and the cell cycle of cultured NSCs. EPA also increased mRNA levels of Hes1, an inhibitor of neuronal differentiation, Hes6, an inhibitor of Hes1, NeuroD, and Map2 mRNA and Tuj-1-positive cells (a neuronal marker), indicating that EPA induced neuronal differentiation. EPA increased the mRNA levels of p21cip1 and p27kip1, a cyclin-dependent kinase inhibitor, which indicated that EPA induced cell cycle arrest. Treatment with AA decreased Hes1 mRNA but did not affect NeuroD and Map2 mRNA levels. Furthermore, AA did not affect the number of Tuj-1-positive cells or cell cycle progression. These results indicated that EPA could be involved in neuronal differentiation by mechanisms alternative to those of DHA, whereas AA did not affect neuronal differentiation in NSCs.
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Haapa-Paananen S, Kiviluoto S, Waltari M, Puputti M, Mpindi JP, Kohonen P, Tynninen O, Haapasalo H, Joensuu H, Perälä M, Kallioniemi O. HES6 gene is selectively overexpressed in glioma and represents an important transcriptional regulator of glioma proliferation. Oncogene 2012; 31:1299-310. [PMID: 21785461 DOI: 10.1038/onc.2011.316] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2011] [Revised: 06/14/2011] [Accepted: 06/21/2011] [Indexed: 12/15/2022]
Abstract
Malignant glioma is the most common brain tumor with 16,000 new cases diagnosed annually in the United States. We performed a systematic large-scale transcriptomics data mining study of 9783 tissue samples from the GeneSapiens database to systematically identify genes that are most glioma-specific. We searched for genes that were highly expressed in 322 glioblastoma multiforme tissue samples and 66 anaplastic astrocytomas as compared with 425 samples from histologically normal central nervous system. Transcription cofactor HES6 (hairy and enhancer of split 6) emerged as the most glioma-specific gene. Immunostaining of a tissue microarray showed HES6 expression in 335 (98.8%) out of the 339 glioma samples. HES6 was expressed in endothelial cells of the normal brain and glioma tissue. Recurrent grade 2 astrocytomas and grade 2 or 3 oligodendrogliomas showed higher levels of HES6 immunoreactivity than the corresponding primary tumors. High HES6 mRNA expression correlated with the proneural subtype that generally has a favorable outcome but is prone to recur. Functional studies suggested an important role for HES6 in supporting survival of glioma cells, as evidenced by reduction of cancer cell proliferation and migration after HES6 silencing. The biological role and consequences of HES6 silencing and overexpression was explored with genome-wide analyses, which implicated a role for HES6 in p53, c-myc and nuclear factor-κB transcriptional networks. We conclude that HES6 is important for glioma cell proliferation and migration, and may have a role in angiogenesis.
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Affiliation(s)
- S Haapa-Paananen
- Department of Medical Biotechnology, VTT Technical Research Centre of Finland and Centre for Biotechnology, University of Turku, Turku, Finland.
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Okui T, Hashimoto M, Katakura M, Shido O. Cis-9,trans-11-conjugated linoleic acid promotes neuronal differentiation through regulation of Hes6 mRNA and cell cycle in cultured neural stem cells. Prostaglandins Leukot Essent Fatty Acids 2011; 85:163-9. [PMID: 21723718 DOI: 10.1016/j.plefa.2011.06.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Revised: 03/23/2011] [Accepted: 06/08/2011] [Indexed: 10/18/2022]
Abstract
Conjugated linoleic acids (CLAs) are positional and geometrical isomers of linoleic acid (LA). Cis-9,trans-11-CLA (CLA), the main isomer of CLAs in foods derived from ruminants, has several beneficial effects for humans and animals; however, its effects on the central nervous system are largely unknown. In this study, we investigated the effects of LA and CLA on neuronal differentiation of neural stem cells (NSCs). NSCs cultured with or without LA and CLA were assessed by immunofluorescence staining, mRNA measurement of basic helix-loop-helix transcription factors and cyclin-dependent kinase inhibitors by real-time PCR, BrdU incorporation analysis and flow cytometry analysis. In NSCs treated with CLA, the number of Tuj-1-positive cells (neurons) and the mRNA expression levels of Hes6, MAP2, p21(cip1) and p27(kip1) increased, while the proportion of S-phase cells decreased; compared with the control, no change was demonstrated in NSCs treated with LA. These results suggest that CLA promotes neuronal differentiation by increasing, in part, the expression of Hes6 mRNA and by activating p21(cip1) and p27(kip1) to arrest cell cycle.
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Affiliation(s)
- Toshiyuki Okui
- Department of Environmental Physiology, Shimane University Faculty of Medicine, Izumo, Shimane 693-8501, Japan
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7
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Drenzek JG, Seiler NL, Jaskula-Sztul R, Rausch MM, Rose SL. Xanthohumol decreases Notch1 expression and cell growth by cell cycle arrest and induction of apoptosis in epithelial ovarian cancer cell lines. Gynecol Oncol 2011; 122:396-401. [PMID: 21616523 DOI: 10.1016/j.ygyno.2011.04.027] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2010] [Revised: 04/05/2011] [Accepted: 04/19/2011] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Notch1 signaling is active in ovarian cancer and is a promising pathway for new therapies in ovarian cancer. We have previously detected high Notch1 expression in ovarian tumors. Xanthohumol has been shown to inhibit cancer cell growth and invasion, including Kaposi's sarcoma, which also highly expresses Notch1. We hypothesized that the Notch1 signaling pathway is targeted by xanthohumol leading to decreased ovarian cancer cell growth. METHODS SKOV3 and OVCAR3 cells were utilized. MTT growth assays were conducted following treatment with xanthohumol. Quantitative RT-PCR and Western blot analyses were conducted to assess Notch1 down-regulation. Luciferase reporter assays were performed to assess functional down-regulation of Notch1. Cell cycle analysis was performed by flow cytometry. RESULTS Significant growth inhibition and down-regulation of Notch1 transcription and protein expression were found following xanthohumol treatment. In addition, xanthohumol increased Hes6 transcription and decreased Hes1 transcription, known downstream targets of Notch 1. These observations were associated with cell cycle inhibition as demonstrated by an increase in p21 expression and S and G2/M cell cycle arrest confirmed by an increase in phosphorylated cdc2. Furthermore, an increase in the apoptotic markers, cleaved caspase-3 and cleaved PARP were observed. CONCLUSION Xanthohumol was a potent inhibitor of ovarian cancer cell growth, and our results suggest that xanthohumol may be influencing the Notch1 pathway. These findings suggest that xanthohumol could be useful as a therapeutic agent in ovarian cancer.
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Affiliation(s)
- Jessica G Drenzek
- Department of Obstetrics and Gynecology, The University of Wisconsin School of Medicine and Public Health, Madison, WI 53792, USA
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8
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Qi J, Nakayama K, Cardiff RD, Borowsky AD, Kaul K, Williams R, Krajewski S, Mercola D, Carpenter PM, Bowtell D, Ronai ZA. Siah2-dependent concerted activity of HIF and FoxA2 regulates formation of neuroendocrine phenotype and neuroendocrine prostate tumors. Cancer Cell 2010; 18:23-38. [PMID: 20609350 PMCID: PMC2919332 DOI: 10.1016/j.ccr.2010.05.024] [Citation(s) in RCA: 188] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2009] [Revised: 03/25/2010] [Accepted: 05/14/2010] [Indexed: 11/24/2022]
Abstract
Neuroendocrine (NE) phenotype, seen in >30% of prostate adenocarcinomas (PCa), and NE prostate tumors are implicated in aggressive prostate cancer. Formation of NE prostate tumors in the TRAMP mouse model was suppressed in mice lacking the ubiquitin ligase Siah2, which regulates HIF-1alpha availability. Cooperation between HIF-1alpha and FoxA2, a transcription factor expressed in NE tissue, promotes recruitment of p300 to transactivate select HIF-regulated genes, Hes6, Sox9, and Jmjd1a. These HIF-regulated genes are highly expressed in metastatic PCa and required for hypoxia-mediated NE phenotype, metastasis in PCa, and the formation of NE tumors. Tissue-specific expression of FoxA2 combined with Siah2-dependent HIF-1alpha availability enables a transcriptional program required for NE prostate tumor development and NE phenotype in PCa.
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MESH Headings
- Adenocarcinoma/genetics
- Adenocarcinoma/metabolism
- Adenocarcinoma/pathology
- Animals
- Cell Line, Tumor
- Female
- Gene Expression Regulation, Neoplastic
- Hepatocyte Nuclear Factor 3-beta/genetics
- Hepatocyte Nuclear Factor 3-beta/metabolism
- Humans
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Liver Neoplasms, Experimental/genetics
- Liver Neoplasms, Experimental/metabolism
- Liver Neoplasms, Experimental/secondary
- Lung Neoplasms/genetics
- Lung Neoplasms/metabolism
- Lung Neoplasms/secondary
- Lymphatic Metastasis
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Neuroendocrine Tumors/genetics
- Neuroendocrine Tumors/metabolism
- Neuroendocrine Tumors/pathology
- Neurosecretory Systems/metabolism
- Neurosecretory Systems/pathology
- Phenotype
- Prostate/metabolism
- Prostate/pathology
- Prostatic Neoplasms/genetics
- Prostatic Neoplasms/metabolism
- Prostatic Neoplasms/pathology
- Signal Transduction
- Transcriptional Activation
- Ubiquitin-Protein Ligases/physiology
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Affiliation(s)
- Jianfei Qi
- Signal Transduction Program, Sanford-Burnham Medical Research Institute, La Jolla, CA 92037, USA
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9
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da Cunha AF, Brugnerotto AF, Duarte AS, Lanaro C, Costa GGL, Saad STO, Costa FF. Global gene expression reveals a set of new genes involved in the modification of cells during erythroid differentiation. Cell Prolif 2010; 43:297-309. [PMID: 20546246 DOI: 10.1111/j.1365-2184.2010.00679.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
OBJECTIVES Erythroid differentiation is a dynamic process in which a pluripotent stem cell undergoes a series of developmental changes that commit it to a specific lineage. These alterations involve changes in gene expression profiles. In this study, gene expression profiles during differentiation of human erythroid cells of a normal blood donor were evaluated using SAGE. MATERIALS AND METHODS Global gene expression was evaluated in cells collected immediately before addition of erythropoietin (0 h) and 192 and 336 h after addition of this hormone. Real-time PCR was used to evaluate activation of differentially expressed genes. RESULTS The data indicate that global aspects of the transcriptome were similar during differentiation of the majority of the genes and that a relatively small set of genes is probably involved in modification of erythroid cells during differentiation. We have identified 93 differentially expressed genes during erythroid development, and expression of some of these was confirmed by qPCR. Various genes including EYA3, ERH, HES6, TIMELESS and TRIB3 were found to be homologous to those of Drosophila melanogaster and here are described for the first time during erythroid development. An important and unique carboxypeptidase inhibitor described in mammalians, LXN, was also identified. CONCLUSIONS The results of this study amplify previously published data and may contribute to comprehension of erythroid differentiation and identification of new target genes involved in some erythroid concerning diseases.
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Affiliation(s)
- A F da Cunha
- Departamento de Genética e Evolução, Centro de Ciências Biológicas e da Saúde, Universidade Federal de São Carlos, São Carlos, São Paulo, Brazil.
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10
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Eun B, Cho B, Moon Y, Kim SY, Kim K, Kim H, Sun W. Induction of neuronal apoptosis by expression of Hes6 via p53-dependent pathway. Brain Res 2009; 1313:1-8. [PMID: 19968968 DOI: 10.1016/j.brainres.2009.11.078] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2009] [Revised: 11/23/2009] [Accepted: 11/30/2009] [Indexed: 01/22/2023]
Abstract
Hes6 is a member of hairy/enhancer of split (Hes) family that plays a role in the cell proliferation and differentiation. Recently, we found that Hes6 is involved in the regulation of cell proliferation via p53-dependent pathway. In addition to the proliferating regions, brain regions where early post-mitotic neurons are enriched also exhibited Hes6 and p53 mRNA expression. Because p53 is involved in the post-mitotic neuronal apoptosis, here we investigated whether Hes6 can influence the neuronal survival/death. Overexpression of wild-type Hes6 and its mutants induced the apoptosis of primary cultured cortical neurons. In addition, neuronal apoptosis by Hes6 overexpression was markedly blunted in p53(-/-) or Bax(-/-) cortical neurons, suggesting that these pro-apoptotic effects are mediated by p53- and Bax-dependent pathway. However, transactivation-defective mutants of Hes6 also enhanced neuronal apoptosis, suggesting that apoptogenic activity of Hes6 is not directly related to its role in the transcriptional regulation. We propose that Hes6 may play a significant role in the neuronal cell death and/or pathological neurodegeneration via activation of p53 signaling.
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Affiliation(s)
- Bokkee Eun
- Department of Anatomy, Brain Korea 21, Korea University College of Medicine, Seoul, Korea
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