151
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Mortazavi Jahromi SS, Jamshidi MM, Yousefi M, Navabi SS, Motamed N, Zavareh FT, Mirshafiey A. Inhibitory effect of G2013 molecule as a novel immunomodulatory agent, on miR-155 gene expression in HEK-Blue hTLR4 cell line. EUR J INFLAMM 2016. [DOI: 10.1177/1721727x16660093] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Lack of regulation of microRNAs (miRNAs) expression has been observed in some autoimmune diseases such as rheumatoid arthritis and systemic lupus erythematosus. G2013, as a novel non-steroidal anti-inflammatory drug (NSAID) with the immunomodulatory property, has been shown the positive effects in multiple sclerosis and anti-ageing experimental models. This research aimed to study the inhibitory effect of G2013 on miR-155 gene expression using HEK-Blue hTLR4 and Null2 cell lines. Total RNA was extracted from the treated and control cells. cDNA was made for miRNA and expression levels of miR-155 were detected by quantitative Real-time PCR using a specific primer together with U6 as the internal reference gene. A non-significant reduction was observed in the gene expression level of miR-155 in the HEK-Blue hTLR4 and Null2 cell lines under the influence of a low dose of G2013. In contrast, adding lipopolysaccharide (LPS) to the mentioned cells led to a significant increase in miR-155 expression, whereas addition of LPS four hours after exposing the cells with G2013 could not increase the expression level of this miRNA ( P < 0.05). Collectively, this research showed that G2013, as a novel NSAID with immunomodulatory property is able to significantly decrease the gene expression of miR-155 following stimulation by LPS.
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Affiliation(s)
- Seyed Shahabeddin Mortazavi Jahromi
- Department of Cellular and Molecular Biology, Kish International Campus, University of Tehran, Kish, Iran
- School of Biology, University College of Science, University of Tehran, Tehran, Iran
| | - Mehdi Malek Jamshidi
- Department of Cellular and Molecular Biology, Kish International Campus, University of Tehran, Kish, Iran
- School of Biology, University College of Science, University of Tehran, Tehran, Iran
| | - Mehdi Yousefi
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Shadi Sadat Navabi
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Nasrin Motamed
- Department of Cellular and Molecular Biology, Kish International Campus, University of Tehran, Kish, Iran
- School of Biology, University College of Science, University of Tehran, Tehran, Iran
| | - Farzaneh Tofighi Zavareh
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Abbas Mirshafiey
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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152
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Yan W, Xu L, Sun Z, Lin Y, Zhang W, Chen J, Hu S, Shen B. MicroRNA biomarker identification for pediatric acute myeloid leukemia based on a novel bioinformatics model. Oncotarget 2016; 6:26424-36. [PMID: 26317787 PMCID: PMC4694912 DOI: 10.18632/oncotarget.4459] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 06/19/2015] [Indexed: 01/25/2023] Open
Abstract
Acute myeloid leukemia (AML) in children is a complex and heterogeneous disease. The identification of reliable and stable molecular biomarkers for diagnosis, especially early diagnosis, remains a significant therapeutic challenge. Aberrant microRNA expression could be used for cancer diagnosis and treatment selection. Here, we describe a novel bioinformatics model for the prediction of microRNA biomarkers for the diagnosis of paediatric AML based on computational functional analysis of the microRNA regulatory network substructure. microRNA-196b, microRNA-155 and microRNA-25 were identified as putative diagnostic biomarkers for pediatric AML. Further systematic analysis confirmed the association of the predicted microRNAs with the leukemogenesis of AML. In vitro q-PCR experiments showed that microRNA-155 is significantly overexpressed in children with AML and microRNA-196b is significantly overexpressed in subgroups M4–M5 of the French-American-British classification system. These results suggest that microRNA-155 is a potential diagnostic biomarker for all subgroups of paediatric AML, whereas microRNA-196b is specific for subgroups M4–M5.
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Affiliation(s)
- Wenying Yan
- Center for Systems Biology, Soochow University, Suzhou, 215006, China.,Taicang Center for Translational Bioinformatics, Taicang 215400, China.,The 100th Hospital of PLA, Suzhou 215007, China
| | - Lihua Xu
- Department of Hematology and Oncology, Children's Hospital of Soochow University, Suzhou 215003, China.,Department of Pediatrics, The First People's Hospital of Lianyungang, Lianyungang, Jiangsu 222002, China
| | - Zhandong Sun
- Center for Systems Biology, Soochow University, Suzhou, 215006, China
| | - Yuxin Lin
- Center for Systems Biology, Soochow University, Suzhou, 215006, China
| | - Wenyu Zhang
- Center for Systems Biology, Soochow University, Suzhou, 215006, China
| | - Jiajia Chen
- School of Chemistry, Biology and Material Engineering, Suzhou University of Science and Technology, Suzhou 215011, China
| | - Shaoyan Hu
- Department of Hematology and Oncology, Children's Hospital of Soochow University, Suzhou 215003, China
| | - Bairong Shen
- Center for Systems Biology, Soochow University, Suzhou, 215006, China
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153
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Wojtowicz EE, Lechman ER, Hermans KG, Schoof EM, Wienholds E, Isserlin R, van Veelen PA, Broekhuis MJC, Janssen GMC, Trotman-Grant A, Dobson SM, Krivdova G, Elzinga J, Kennedy J, Gan OI, Sinha A, Ignatchenko V, Kislinger T, Dethmers-Ausema B, Weersing E, Alemdehy MF, de Looper HWJ, Bader GD, Ritsema M, Erkeland SJ, Bystrykh LV, Dick JE, de Haan G. Ectopic miR-125a Expression Induces Long-Term Repopulating Stem Cell Capacity in Mouse and Human Hematopoietic Progenitors. Cell Stem Cell 2016; 19:383-96. [PMID: 27424784 DOI: 10.1016/j.stem.2016.06.008] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 04/01/2016] [Accepted: 06/15/2016] [Indexed: 12/25/2022]
Abstract
Umbilical cord blood (CB) is a convenient and broadly used source of hematopoietic stem cells (HSCs) for allogeneic stem cell transplantation. However, limiting numbers of HSCs remain a major constraint for its clinical application. Although one feasible option would be to expand HSCs to improve therapeutic outcome, available protocols and the molecular mechanisms governing the self-renewal of HSCs are unclear. Here, we show that ectopic expression of a single microRNA (miRNA), miR-125a, in purified murine and human multipotent progenitors (MPPs) resulted in increased self-renewal and robust long-term multi-lineage repopulation in transplanted recipient mice. Using quantitative proteomics and western blot analysis, we identified a restricted set of miR-125a targets involved in conferring long-term repopulating capacity to MPPs in humans and mice. Our findings offer the innovative potential to use MPPs with enhanced self-renewal activity to augment limited sources of HSCs to improve clinical protocols.
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Affiliation(s)
- Edyta E Wojtowicz
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Centre Groningen, University of Groningen, Antonius Deusinglaan 1, 9700 AV Groningen, the Netherlands
| | - Eric R Lechman
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Karin G Hermans
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Erwin M Schoof
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Erno Wienholds
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Ruth Isserlin
- The Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Peter A van Veelen
- Departments of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Mathilde J C Broekhuis
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Centre Groningen, University of Groningen, Antonius Deusinglaan 1, 9700 AV Groningen, the Netherlands
| | - George M C Janssen
- Departments of Immunohematology and Blood Transfusion, Leiden University Medical Center, 2333 ZA Leiden, the Netherlands
| | - Aaron Trotman-Grant
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Stephanie M Dobson
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Gabriela Krivdova
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Jantje Elzinga
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada
| | - James Kennedy
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Olga I Gan
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada
| | - Ankit Sinha
- Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - Vladimir Ignatchenko
- Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - Thomas Kislinger
- Department of Medical Biophysics, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - Bertien Dethmers-Ausema
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Centre Groningen, University of Groningen, Antonius Deusinglaan 1, 9700 AV Groningen, the Netherlands
| | - Ellen Weersing
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Centre Groningen, University of Groningen, Antonius Deusinglaan 1, 9700 AV Groningen, the Netherlands
| | - Mir Farshid Alemdehy
- Department of Hematology, Erasmus University Medical Center Cancer Institute, Wytemaweg 80, 3015 CN Rotterdam, the Netherlands
| | - Hans W J de Looper
- Department of Hematology, Erasmus University Medical Center Cancer Institute, Wytemaweg 80, 3015 CN Rotterdam, the Netherlands
| | - Gary D Bader
- The Donnelly Centre, University of Toronto, Toronto, ON M5S 3E1, Canada
| | - Martha Ritsema
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Centre Groningen, University of Groningen, Antonius Deusinglaan 1, 9700 AV Groningen, the Netherlands
| | - Stefan J Erkeland
- Department of Immunology, Erasmus University Medical Center, Wytemaweg 80, 3015CN Rotterdam, the Netherlands
| | - Leonid V Bystrykh
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Centre Groningen, University of Groningen, Antonius Deusinglaan 1, 9700 AV Groningen, the Netherlands
| | - John E Dick
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada.
| | - Gerald de Haan
- Laboratory of Ageing Biology and Stem Cells, European Research Institute for the Biology of Ageing, University Medical Centre Groningen, University of Groningen, Antonius Deusinglaan 1, 9700 AV Groningen, the Netherlands.
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154
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Wang H, Men CP. Correlation of Increased Expression of MicroRNA-155 in Bladder Cancer and Prognosis. Lab Med 2016; 46:118-22. [PMID: 25918190 DOI: 10.1309/lmwr9cea2k2xvsox] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
OBJECTIVE To investigate the expression level and clinical significance of microRNA-155 (miR-155) in bladder cancer. METHODS We collected 102 pairs of tissue specimens from patients with primary bladder cancer and adjacent normal bladder specimens between March 2008 and May 2013. Quantitative real-time polymerase chain reaction (QRT-PCR) was performed to detect the expression levels of miR-155. We performed univariate survival analyses using the Kaplan-Meier method and assessed statistical significance between survival curves via the log-rank test. RESULTS The mean (SD) level of miR-155 expression in tissues with bladder cancer was 13.78 (4.80), which was significantly higher on average than that in adjacent normal bladder tissues (6.14 [2.26], P <.001). Progression-free survival (PFS) was significantly lower for patients with bladder cancer who had a high expression level of miR-155 (5-year survival rate, 23.0%) than those with a low miR-155 expression level (5-year survival rate, 48.9%; P <.001). CONCLUSIONS We found that elevated expression of miR-155 is correlated with a poor outcome for patients with bladder cancer; this suggests that miR-155 is a potential biomarker for bladder cancer prognosis.
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Affiliation(s)
- Hui Wang
- Department of Urology, Yantai Yuhuangding Hospital, Yantai, Shandong, China
| | - Chang-Ping Men
- Department of Urology, Yantai Yuhuangding Hospital, Yantai, Shandong, China
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155
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Nucera S, Giustacchini A, Boccalatte F, Calabria A, Fanciullo C, Plati T, Ranghetti A, Garcia-Manteiga J, Cittaro D, Benedicenti F, Lechman ER, Dick JE, Ponzoni M, Ciceri F, Montini E, Gentner B, Naldini L. miRNA-126 Orchestrates an Oncogenic Program in B Cell Precursor Acute Lymphoblastic Leukemia. Cancer Cell 2016; 29:905-921. [PMID: 27300437 DOI: 10.1016/j.ccell.2016.05.007] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 01/12/2016] [Accepted: 05/18/2016] [Indexed: 12/11/2022]
Abstract
MicroRNA (miRNA)-126 is a known regulator of hematopoietic stem cell quiescence. We engineered murine hematopoiesis to express miRNA-126 across all differentiation stages. Thirty percent of mice developed monoclonal B cell leukemia, which was prevented or regressed when a tetracycline-repressible miRNA-126 cassette was switched off. Regression was accompanied by upregulation of cell-cycle regulators and B cell differentiation genes, and downregulation of oncogenic signaling pathways. Expression of dominant-negative p53 delayed blast clearance upon miRNA-126 switch-off, highlighting the relevance of p53 inhibition in miRNA-126 addiction. Forced miRNA-126 expression in mouse and human progenitors reduced p53 transcriptional activity through regulation of multiple p53-related targets. miRNA-126 is highly expressed in a subset of human B-ALL, and antagonizing miRNA-126 in ALL xenograft models triggered apoptosis and reduced disease burden.
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Affiliation(s)
- Silvia Nucera
- San Raffaele Telethon Institute for Gene Therapy, 20132 Milan, Italy
| | - Alice Giustacchini
- San Raffaele Telethon Institute for Gene Therapy, 20132 Milan, Italy; Vita Salute San Raffaele University, 20132 Milan, Italy
| | - Francesco Boccalatte
- San Raffaele Telethon Institute for Gene Therapy, 20132 Milan, Italy; Vita Salute San Raffaele University, 20132 Milan, Italy
| | - Andrea Calabria
- San Raffaele Telethon Institute for Gene Therapy, 20132 Milan, Italy
| | - Cristiana Fanciullo
- San Raffaele Telethon Institute for Gene Therapy, 20132 Milan, Italy; Vita Salute San Raffaele University, 20132 Milan, Italy
| | - Tiziana Plati
- San Raffaele Telethon Institute for Gene Therapy, 20132 Milan, Italy
| | - Anna Ranghetti
- San Raffaele Telethon Institute for Gene Therapy, 20132 Milan, Italy
| | - Jose Garcia-Manteiga
- Centre for Translational Genomics and Bioinformatics, IRCSS Ospedale San Raffaele, 20132 Milan, Italy
| | - Davide Cittaro
- Centre for Translational Genomics and Bioinformatics, IRCSS Ospedale San Raffaele, 20132 Milan, Italy
| | | | - Eric R Lechman
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - John E Dick
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON M5G 1L7, Canada; Department of Molecular Genetics, University of Toronto, Toronto, ON M5G 1L7, Canada
| | - Maurilio Ponzoni
- Vita Salute San Raffaele University, 20132 Milan, Italy; Pathology Unit, IRCSS Ospedale San Raffaele, 20132 Milan, Italy
| | - Fabio Ciceri
- Vita Salute San Raffaele University, 20132 Milan, Italy; Hematology and Bone Marrow Transplantation Unit, IRCSS Ospedale San Raffaele, 20132 Milan, Italy
| | - Eugenio Montini
- San Raffaele Telethon Institute for Gene Therapy, 20132 Milan, Italy
| | - Bernhard Gentner
- San Raffaele Telethon Institute for Gene Therapy, 20132 Milan, Italy; Hematology and Bone Marrow Transplantation Unit, IRCSS Ospedale San Raffaele, 20132 Milan, Italy.
| | - Luigi Naldini
- San Raffaele Telethon Institute for Gene Therapy, 20132 Milan, Italy; Vita Salute San Raffaele University, 20132 Milan, Italy.
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156
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Alemdehy MF, de Looper HWJ, Kavelaars FG, Sanders MA, Hoogenboezem R, Löwenberg B, Valk PJM, Touw IP, Erkeland SJ. MicroRNA-155 induces AML in combination with the loss of C/EBPA in mice. Leukemia 2016; 30:2238-2241. [DOI: 10.1038/leu.2016.171] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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157
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Abstract
PURPOSE OF REVIEW The review will update readers on research examining the influence of genetic variation and epigenetics on the immune system and whether genetic variation influences the outcome of critically ill children. RECENT FINDINGS Although there have been few recent studies examining the role of genetic variation in the severity of disease or outcome in critically ill children, studies in critically ill adults have been informative. For example, genetic variations in the genes coding for various components of the immune response, such as the Toll-like receptor 1, interleukin-1RA, proprotein convertase subtilisin/kexin type 9, adoponectin, nuclear factor erythroid 2-related factor 2, elafin, sphingosine 1-phosphate receptor 3, and sushi, von Willebrand factor type A, EGF and pentraxin domain containing 1 have been associated with various outcomes in critically ill adult populations. Many of the variants demonstrate functional consequences in the protein levels or activities. In critically ill children, there is an association with increased ICU length of stay in children with septic shock with one of the Toll-like receptor 1 variants. SUMMARY The degree of influence of host genetic variation in the outcome in critically ill children remains a much understudied area of research. However, it remains important because it may not only help identify children at risk for worse outcomes but it may provide insight into mechanisms of critical illnesses and novel therapies.
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158
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Gan L, Xiong Y, Dong F, Yu Y, Zhang L, Shunmei E, Zhou L, Li X, Hu G. Profiling kidney microRNAs from juvenile grass carp (Ctenopharyngodon idella) after 56days of oral exposure to decabromodiphenyl ethane. J Environ Sci (China) 2016; 44:69-75. [PMID: 27266303 DOI: 10.1016/j.jes.2015.09.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 09/01/2015] [Accepted: 09/28/2015] [Indexed: 06/06/2023]
Abstract
Grass carp (Ctenopharyngodon idella) is one of the most important species in China. Decabromodiphenyl ethane (DBDPE) is a brominated flame retardant that has been used widely in industry, and has been observed to accumulate in the tissues of fish from South China. Evidence has shown that DBDPE is toxic to aquatic animals, but the molecular response has been unclear. MicroRNAs (miRNAs) are small noncoding and negative regulatory RNAs that are 20-24 nucleotides in length, which are involved in a wide range of biological processes. We took advantage of deep-sequencing techniques to accurately and comprehensively profile the kidney miRNA expression of grass carp after 8weeks of oral exposure to DBDPE. After mapping sequencing data to the genome and Expressed Sequence Tags (ESTs) of grass carp, we identified 493 miRNAs in the sequenced grass carp samples, which included 51 new miRNAs. The results indicated that 5 miRNAs were significantly down-regulated and 36 miRNAs were significantly up-regulated (FDR<0.001, 1.5-fold change) after DBDPE exposure. Real-time quantitative PCR (RT-qPCR) was performed on 4 miRNAs from the two samples, and the sequencing and RT-qPCR data were consistent. This study provides the first comprehensive identification of grass carp miRNAs, and the first expression analysis of grass carp miRNAs following DBDPE exposure. The results indicated that miRNAs have potential for use as biomarkers.
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Affiliation(s)
- Lian Gan
- Animal Science College, South China Agricultural University, Guangzhou 510640, China.
| | - Yuanyan Xiong
- School of Life Science, Sun Yat-Sen University, Guangzhou 510006, China; SYSU-CMU Shunde International Joint Research Institute, Shunde 5283000, China
| | - Fang Dong
- School of Life Science, Sun Yat-Sen University, Guangzhou 510006, China
| | - Yunjiang Yu
- South China Institutes of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510535, China
| | - Lijuan Zhang
- South China Institutes of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510535, China
| | - E Shunmei
- Department of Clinical Laboratory, The Tradition Chinese Hospital of Guangdong Province, Guangzhou 510006, China
| | - Liliu Zhou
- Animal Science College, South China Agricultural University, Guangzhou 510640, China
| | - Xiaoxia Li
- Animal Science College, South China Agricultural University, Guangzhou 510640, China
| | - Guocheng Hu
- South China Institutes of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510535, China.
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159
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Schober A, Weber C. Mechanisms of MicroRNAs in Atherosclerosis. ANNUAL REVIEW OF PATHOLOGY-MECHANISMS OF DISEASE 2016; 11:583-616. [DOI: 10.1146/annurev-pathol-012615-044135] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Andreas Schober
- Institute for Cardiovascular Prevention, Ludwig Maximilians University Munich, Munich 80336, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Munich Heart Alliance, Munich 80336, Germany;
| | - Christian Weber
- Institute for Cardiovascular Prevention, Ludwig Maximilians University Munich, Munich 80336, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Munich Heart Alliance, Munich 80336, Germany;
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160
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MicroRNA Profile in CD8+ T-Lymphocytes from HIV-Infected Individuals: Relationship with Antiviral Immune Response and Disease Progression. PLoS One 2016; 11:e0155245. [PMID: 27171002 PMCID: PMC4865051 DOI: 10.1371/journal.pone.0155245] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 04/26/2016] [Indexed: 12/02/2022] Open
Abstract
Background The relationship between host microRNAs (miRNA), viral control and immune response has not yet been elucidated in the field of HIV. The aim of this study was to assess the differential miRNA profile in CD8+ T-cells between HIV-infected individuals who differ in terms of viral replication control and immune response. Methods miRNA profile from resting and CD3/CD28-stimulated CD8+ T-cells from uninfected individuals (HIV-, n = 11), Elite Controllers (EC, n = 15), Viremic Controllers (VC, n = 15), Viremic Progressors (VP, n = 13) and HIV-infected patients on therapy (ART, n = 14) was assessed using Affymetrix miRNA 3.1 arrays. After background correction, quantile normalization and median polish summarization, normalized data were fit to a linear model. The analysis comprised: resting samples between groups; stimulated samples between groups; and stimulated versus resting samples within each group. Enrichment analyses of the putative target genes were perfomed using bioinformatic algorithms. Results A downregulated miRNA pattern was observed when resting samples from all infected groups were compared to HIV-. A miRNA downregulation was also observed when stimulated samples from EC, ART and HIV- groups were compared to VP, being hsa-miR-4492 the most downregulated. Although a preferential miRNA downregulation was observed when stimulated samples were compared to the respective resting samples, VP presented a differential miRNA expression pattern. In fact, hsa-miR-155 and hsa-miR-181a were downregulated in VP whereas in the other groups, either an upregulation or no differences were observed after stimulation, respectively. Overall, functional enrichment analysis revealed that the predicted target genes were involved in signal transduction pathways, metabolic regulation, apoptosis, and immune response. Conclusions Resting CD8+ T-cells do not exhibit a differential miRNA expression between HIV-infected individuals but they do differ from non-infected individuals. Moreover, a specific miRNA pattern is present in stimulated CD8+ T-cells from VP which could reflect a detrimental pattern in terms of CD8+ T-cell immune response.
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161
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Lambert NG, ElShelmani H, Singh MK, Mansergh FC, Wride MA, Padilla M, Keegan D, Hogg RE, Ambati BK. Risk factors and biomarkers of age-related macular degeneration. Prog Retin Eye Res 2016; 54:64-102. [PMID: 27156982 DOI: 10.1016/j.preteyeres.2016.04.003] [Citation(s) in RCA: 230] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 04/01/2016] [Accepted: 04/12/2016] [Indexed: 02/03/2023]
Abstract
A biomarker can be a substance or structure measured in body parts, fluids or products that can affect or predict disease incidence. As age-related macular degeneration (AMD) is the leading cause of blindness in the developed world, much research and effort has been invested in the identification of different biomarkers to predict disease incidence, identify at risk individuals, elucidate causative pathophysiological etiologies, guide screening, monitoring and treatment parameters, and predict disease outcomes. To date, a host of genetic, environmental, proteomic, and cellular targets have been identified as both risk factors and potential biomarkers for AMD. Despite this, their use has been confined to research settings and has not yet crossed into the clinical arena. A greater understanding of these factors and their use as potential biomarkers for AMD can guide future research and clinical practice. This article will discuss known risk factors and novel, potential biomarkers of AMD in addition to their application in both academic and clinical settings.
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Affiliation(s)
- Nathan G Lambert
- Ambati Lab, John A. Moran Eye Center, 65 Mario Capecchi Drive, Salt Lake City, UT, USA; Department of Ophthalmology & Visual Sciences, University of Utah, 65 Mario Capecchi Drive, Salt Lake City, UT, USA.
| | - Hanan ElShelmani
- Ocular Development and Neurobiology Research Group, Zoology Department, School of Natural Sciences, University of Dublin, Trinity College, Dublin 2, Ireland.
| | - Malkit K Singh
- Ambati Lab, John A. Moran Eye Center, 65 Mario Capecchi Drive, Salt Lake City, UT, USA; Department of Ophthalmology & Visual Sciences, University of Utah, 65 Mario Capecchi Drive, Salt Lake City, UT, USA.
| | - Fiona C Mansergh
- Smurfit Institute of Genetics, Trinity College Dublin, Dublin 2, Ireland.
| | - Michael A Wride
- Ocular Development and Neurobiology Research Group, Zoology Department, School of Natural Sciences, University of Dublin, Trinity College, Dublin 2, Ireland.
| | - Maximilian Padilla
- Ambati Lab, John A. Moran Eye Center, 65 Mario Capecchi Drive, Salt Lake City, UT, USA; Department of Ophthalmology & Visual Sciences, University of Utah, 65 Mario Capecchi Drive, Salt Lake City, UT, USA.
| | - David Keegan
- Mater Misericordia Hospital, Eccles St, Dublin 7, Ireland.
| | - Ruth E Hogg
- Centre for Experimental Medicine, Institute of Clinical Science Block A, Grosvenor Road, Belfast, Co.Antrim, Northern Ireland, UK.
| | - Balamurali K Ambati
- Ambati Lab, John A. Moran Eye Center, 65 Mario Capecchi Drive, Salt Lake City, UT, USA; Department of Ophthalmology & Visual Sciences, University of Utah, 65 Mario Capecchi Drive, Salt Lake City, UT, USA.
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162
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Genome-Wide CRISPR-Cas9 Screen Identifies MicroRNAs That Regulate Myeloid Leukemia Cell Growth. PLoS One 2016; 11:e0153689. [PMID: 27081855 PMCID: PMC4833428 DOI: 10.1371/journal.pone.0153689] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 04/03/2016] [Indexed: 12/17/2022] Open
Abstract
Mammalian microRNA expression is dysregulated in human cancer. However, the functional relevance of many microRNAs in the context of tumor biology remains unclear. Using CRISPR-Cas9 technology, we performed a global loss-of-function screen to simultaneously test the functions of individual microRNAs and protein-coding genes during the growth of a myeloid leukemia cell line. This approach identified evolutionarily conserved human microRNAs that suppress or promote cell growth, revealing that microRNAs are extensively integrated into the molecular networks that control tumor cell physiology. miR-155 was identified as a top microRNA candidate promoting cellular fitness, which we confirmed with two distinct miR-155-targeting CRISPR-Cas9 lentiviral constructs. Further, we performed anti-correlation functional profiling to predict relevant microRNA-tumor suppressor gene or microRNA-oncogene interactions in these cells. This analysis identified miR-150 targeting of p53, a connection that was experimentally validated. Taken together, our study describes a powerful genetic approach by which the function of individual microRNAs can be assessed on a global level, and its use will rapidly advance our understanding of how microRNAs contribute to human disease.
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163
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Inhibition of microRNA-155 ameliorates experimental autoimmune myocarditis by modulating Th17/Treg immune response. J Mol Med (Berl) 2016; 94:1063-79. [DOI: 10.1007/s00109-016-1414-3] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 03/15/2016] [Accepted: 03/24/2016] [Indexed: 12/23/2022]
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164
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Boosani CS, Agrawal DK. Epigenetic Regulation of Innate Immunity by microRNAs. Antibodies (Basel) 2016; 5:E8. [PMID: 31557989 PMCID: PMC6698855 DOI: 10.3390/antib5020008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Revised: 03/16/2016] [Accepted: 03/16/2016] [Indexed: 12/20/2022] Open
Abstract
The innate immune response, which is usually referred to as the first line of defense, protects the hosts against pathogenic micro-organisms. Some of the biomolecules released from the pathogens, such as proteins, lipoproteins and nucleic acids, which are collectively termed as pathogen-associated molecular patterns (PAMPs), elicit signaling mechanisms that trigger immune responses in the hosts. Pathogen recognition receptors (PRRs) on the host cells recognize these PAMPs and initiate intracellular signaling through toll-like receptors (TLRs), RIG-I-like receptors (RLRs), and other pathways which induce production of pro-inflammatory cytokines and type I interferons. Recently, different members of tripartite motif containing proteins (TRIM) family of proteins were identified to intercept and regulate these cellular pathways. Specific targets of TRIM proteins have been identified and their molecular mechanisms were unraveled and identified unique domains involved in protein-protein interactions. Though innate immunity represents a tight and well conserved immune system in the host, gene expression in innate immunity was identified to be influenced by several epigenetic mechanisms including regulation by microRNAs (miRNAs). In this review, we present critical analysis of the findings on the identification of specific miRNAs that modulate expression of target genes involved in the regulation of innate immunity.
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Affiliation(s)
- Chandra S Boosani
- Department of Clinical & Translational Science, Creighton University School of Medicine, Omaha, NE 68178, USA.
| | - Devendra K Agrawal
- Department of Clinical & Translational Science, Creighton University School of Medicine, Omaha, NE 68178, USA.
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165
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Lu K, Nakagawa MM, Thummar K, Rathinam CV. Slicer Endonuclease Argonaute 2 Is a Negative Regulator of Hematopoietic Stem Cell Quiescence. Stem Cells 2016; 34:1343-53. [PMID: 26850790 DOI: 10.1002/stem.2302] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 12/11/2015] [Indexed: 12/12/2022]
Abstract
Hematopoietic stem cells (HSCs) are capable of both self-renewing throughout the lifetime of an organism and differentiating into all lineages of the blood system. A proper balance between quiescence and proliferation is critical for the self-renewal and functions of HSCs. The choice of HSCs to remain quiescent or to enter proliferation has been tightly regulated by a variety of cell intrinsic and extrinsic pathways. Identifying molecular players that control HSC quiescence and proliferation may lead to new treatment strategies and therapeutic interventions for hematologic disorders. To identify the functions of the slicer endonuclease Argonaute (Ago) 2 in the physiology of HSCs, we generated Ago2(Hem-KO) mice, that are deficient for Ago2 in HSCs and in their progeny. Analysis of Ago2(Hem-KO) mice indicated that a loss of Ago2 results in reduced HSC pool size and altered frequencies of hematopoietic progenitors. Ago2 deficient HSCs exhibit defective multilineage differentiation capacities and diminished repopulation abilities, in a cell intrinsic manner. Interestingly, Ago2 mutant HSCs remain largely quiescent and show reduced entry into cell cycle. Genome-wide transcriptome studies and gene set enrichment analysis revealed that Ago2 deficient HSCs downregulate the "HSC signature" and upregulate the "lineage signature." Moreover, our analysis on transcription factors (TFs) identified that a loss of Ago2 is sufficient to alter the "molecular signature" and "TF networks" that control the quiescent and proliferative states of HSCs. In essence, our study identified Ago2 as a key determinant of quiescence exit in HSCs. Stem Cells 2016;34:1343-1353.
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Affiliation(s)
- Kenneth Lu
- Department of Genetics and Development, Columbia University Medical Center, New York, New York, USA
| | | | - Keyur Thummar
- Department of Genetics and Development, Columbia University Medical Center, New York, New York, USA
| | - Chozha Vendan Rathinam
- Department of Genetics and Development, Columbia University Medical Center, New York, New York, USA.,Herbert Irving Comprehensive Cancer Center, Columbia University Medical Center, New York, New York, USA.,Columbia Stem Cell Initiative, Columbia University Medical Center, New York, New York, USA
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166
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Contreras JR, Palanichamy JK, Tran TM, Fernando TR, Rodriguez-Malave NI, Goswami N, Arboleda VA, Casero D, Rao DS. MicroRNA-146a modulates B-cell oncogenesis by regulating Egr1. Oncotarget 2016; 6:11023-37. [PMID: 25906746 PMCID: PMC4484436 DOI: 10.18632/oncotarget.3433] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 02/24/2015] [Indexed: 11/25/2022] Open
Abstract
miR-146a is a NF-κB induced microRNA that serves as a feedback regulator of this critical pathway. In mice, deficiency of miR-146a results in hematolymphoid cancer at advanced ages as a consequence of constitutive NF-κB activity. In this study, we queried whether the deficiency of miR-146a contributes to B-cell oncogenesis. Combining miR-146a deficiency with transgenic expression of c-Myc led to the development of highly aggressive B-cell malignancies. Mice transgenic for c-Myc and deficient for miR-146a were characterized by significantly shortened survival, increased lymph node involvement, differential involvement of the spleen and a mature B-cell phenotype. High-throughput sequencing of the tumors revealed significant dysregulation of approximately 250 genes. Amongst these, the transcription factor Egr1 was consistently upregulated in mice deficient for miR-146a. Interestingly, transcriptional targets of Egr1 were enriched in both the high-throughput dataset and in a larger set of miR-146a-deficient tumors. miR-146a overexpression led to downregulation of Egr1 and downstream targets with concomitant decrease in cell growth. Direct targeting of the human EGR1 by miR-146a was seen by luciferase assay. Together our findings illuminate a bona fide role for miR-146a in the modulation of B-cell oncogenesis and reveal the importance of understanding microRNA function in a cell- and disease-specific context.
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Affiliation(s)
- Jorge R Contreras
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, USA.,Cellular and Molecular Pathology Ph.D. Program, UCLA, Los Angeles, CA, USA
| | | | - Tiffany M Tran
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, USA
| | - Thilini R Fernando
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, USA
| | - Norma I Rodriguez-Malave
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, USA.,Cellular and Molecular Pathology Ph.D. Program, UCLA, Los Angeles, CA, USA
| | - Neha Goswami
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, USA
| | - Valerie A Arboleda
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, USA
| | - David Casero
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, USA
| | - Dinesh S Rao
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, CA, USA.,Jonsson Comprehensive Cancer Center, UCLA, Los Angeles, CA, USA.,Broad Stem Cell Research Center, UCLA, Los Angeles, CA, USA
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167
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YAN HUI, WANG SHUAI, LI ZHENWEI, ZHAO WENTING, WANG ZHEN, SUN ZEWEI, PAN YANYUN, ZHU JIANHUA. Upregulation of miRNA-155 expression by OxLDL in dendritic cells involves JAK1/2 kinase and transcription factors YY1 and MYB. Int J Mol Med 2016; 37:1371-8. [DOI: 10.3892/ijmm.2016.2526] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 03/03/2016] [Indexed: 11/06/2022] Open
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168
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Ma Z, Ma Y, Xia Q, Li Y, Li R, Chang W, Chen J, Leng Z, Tao K. MicroRNA-155 expression inversely correlates with pathologic stage of gastric cancer and it inhibits gastric cancer cell growth by targeting cyclin D1. J Cancer Res Clin Oncol 2016; 142:1201-12. [PMID: 26955820 DOI: 10.1007/s00432-016-2139-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 02/22/2016] [Indexed: 12/14/2022]
Abstract
PURPOSE MicroRNAs (miRs) have been frequently reported dysregulating in tumors and playing a crucial role in tumor development and progression. However, the expression of miR-155 and its role in gastric cancer (GC) are still obscure. METHODS qRT-PCR was applied to detect miR-155 expression in 60 matched GC samples and four GC cell lines, and the relationship between miR-155 levels and clinicopathological features of GC was analyzed. Next, the effects of miR-155 on GC cell growth were evaluated by gain- and loss-of-function analysis. Finally, the target gene(s) of miR-155 in GC cells were explored. RESULTS Our results revealed that miR-155 levels were significantly lower in both GC tissues and GC cell lines than in their normal controls, and its expression inversely correlated with tumor size and the pathologic stage. Moreover, our study showed that enforced expression of miR-155 impaired GC cell proliferation, promoted G1 phase arrest and induced apoptosis in vitro. In addition, we identified cyclin D1 as the direct target of miR-155, and knockdown of cyclin D1 partially phenocopied the role of miR-155 in GC cells. CONCLUSIONS Our findings suggest that miR-155 may act as a potential diagnostic marker for early-stage GC and may represent a novel therapeutic target for GC treatment.
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Affiliation(s)
- Zhijun Ma
- Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Yulan Ma
- Department of Cardiology, General Hospital of Ningxia Medical University, No. 804 Shengli South Street, Yinchuan, 750004, China
| | - Qinghua Xia
- Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Yong Li
- Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Ruidong Li
- Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Weilong Chang
- Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Jinhuang Chen
- Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Zhengwei Leng
- Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China
| | - Kaixiong Tao
- Department of General Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, No. 1277 Jiefang Avenue, Wuhan, 430022, China.
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169
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Abstract
The worldwide increase in the prevalence of obesity and type 2 diabetes and the associated elevated risk of cardiovascular disease (CVD) has emphasized the need to seek new therapeutic targets to offset the negative impact on human health outcomes. In this regards, microRNAs (miRNAs), a class of small noncoding RNAs that mediate posttranscriptional gene silencing, have received considerable interest. miRNAs repress gene expression by their ability to pair with target sequences in the 3' untranslated region of the messenger RNA. miRNAs play a crucial role in the biogenesis and function of the cardiovascular system and are implicated as dynamic regulators of cardiac and vascular signaling and pathophysiology. Numerous miRNAs have been identified as novel biomarkers and potential therapeutic targets for CVD. In this review, we discuss the contribution of miRNAs to the regulation of CVD, their role in macrovascular/microvascular (dys)function, their potential as important biomarkers for the early detection of CVD, and, finally, as therapeutic targets.
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170
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Bhise NS, Chauhan L, Shin M, Cao X, Pounds S, Lamba V, Lamba JK. MicroRNA-mRNA Pairs Associated with Outcome in AML: From In Vitro Cell-Based Studies to AML Patients. Front Pharmacol 2016; 6:324. [PMID: 26858643 PMCID: PMC4729948 DOI: 10.3389/fphar.2015.00324] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 12/30/2015] [Indexed: 12/22/2022] Open
Abstract
Cytarabine is the primary chemotherapeutic agent used for treatment of acute myeloid leukemia (AML). Disease relapse after initial remission remains one of the most pressing therapeutic challenges in the treatment of AML. Relapsed disease is often resistant to cytarabine and subsequent salvage therapy is ineffective. Recent studies have shown that some microRNAs (miRNAs) are associated with prognosis, but have not yet explored the role of miRNAs in cellular response to cytarabine. We identified 20 miRNAs that associate with the in vitro cytarabine chemo-sensitivity or apoptotic response of eight AML cell lines. Out of the 20 miRNAs, data on 18 miRNAs was available in AML patients from The Cancer Genome Atlas database. Our stepwise-integrated analyses (step 1 - miRNA-target mRNA that were significantly correlated in AML patients; step 2 - mRNAs from step 1 with significant association with overall survival (OS)) identified 23 unique miRNA-mRNA pairs predictive of OS in AML patients. As expected HOX genes (HOXA9, HOXB7, and HOXA10) were identified to be regulated by miRs as well as predictive of worse OS. Additionally, miR107-Myb, miR-378-granzyme B involved in granzyme signaling and miR10a-MAP4K4 were identified to be predictive of outcome through integrated analysis. Although additional functional validations to establish clinical/pharmacologic importance of miRNA-mRNA pairs are needed, our results from RNA electrophoretic mobility shift assay confirmed binding of miR-10a, miR-378, and miR-107 with their target genes GALNT1, GZMB, and MYB, respectively. Integration of pathogenic and pharmacologically significant miRNAs and miRNA-mRNA relationships identified in our study opens up opportunities for development of targeted/miRNA-directed therapies.
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Affiliation(s)
- Neha S Bhise
- Department of Pharmacotherapy and Translational Research, University of FloridaGainesville, FL, USA; Department of Experimental and Clinical Pharmacology, University of MinnesotaMinneapolis, MN, USA
| | - Lata Chauhan
- Department of Pharmacotherapy and Translational Research, University of Florida Gainesville, FL, USA
| | - Miyoung Shin
- Department of Pharmacotherapy and Translational Research, University of Florida Gainesville, FL, USA
| | - Xueyuan Cao
- Department of Biostatistics, St. Jude Children's Research Hospital Memphis, TN, USA
| | - Stanley Pounds
- Department of Biostatistics, St. Jude Children's Research Hospital Memphis, TN, USA
| | - Vishal Lamba
- Department of Pharmacotherapy and Translational Research, University of Florida Gainesville, FL, USA
| | - Jatinder K Lamba
- Department of Pharmacotherapy and Translational Research, University of Florida Gainesville, FL, USA
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171
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A novel miR-200b-3p/p38IP pair regulates monocyte/macrophage differentiation. Cell Discov 2016; 2:15043. [PMID: 27462440 PMCID: PMC4860955 DOI: 10.1038/celldisc.2015.43] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 11/05/2015] [Indexed: 01/13/2023] Open
Abstract
Monocyte/macrophage differentiation represents a major branch of hematopoiesis and is a central event in the immune response, but the molecular mechanisms underlying are not fully delineated. Here we show that p38 mitogen-activated protein kinase (MAPK) interacting protein (p38IP) is downregulated during monocyte/macrophage differentiation in vitro. Overexpression of p38IP halted monocyte/macrophage differentiation, whereas forward knockdown of p38IP by RNA interference induced G1/S arrest and promoted monocyte differentiation into macrophages and the maturation of macrophages as well. Moreover, we found that miR-200b-3p was upregulated during monocyte/macrophage differentiation and mediated the downregulation of p38IP by binding to the 3′ untranslated terminal region of p38IP mRNA. Overexpression of a miR-200b-3p mimic resembled the effect of p38IP knockdown, whereas a miR-200b-3p inhibitor blocked monocyte/macrophage differentiation by enhancing p38IP expression. Further western blotting analysis revealed that p38IP downregulation enhanced the activity of p38 MAPK and the subsequent accumulation of cyclin-dependent kinase inhibitor p21, thus promoting G1/S arrest and monocyte/macrophage differentiation. Moreover, the decline of GCN5 acetyltransferase caused by p38IP downregulation was required but was not sufficient for monocyte/macrophage differentiation. This study demonstrated a new role for p38IP and a novel miR-200b-3p/p38IP pair in the regulation of monocyte/macrophage differentiation.
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172
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Cheng CK, Chan NPH, Wan TSK, Lam LY, Cheung CHY, Wong THY, Ip RKL, Wong RSM, Ng MHL. Helicase-like transcription factor is a RUNX1 target whose downregulation promotes genomic instability and correlates with complex cytogenetic features in acute myeloid leukemia. Haematologica 2016; 101:448-57. [PMID: 26802049 DOI: 10.3324/haematol.2015.137125] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 01/13/2016] [Indexed: 12/27/2022] Open
Abstract
Helicase-like transcription factor is a SWI/SNF chromatin remodeling factor involved in various biological processes. However, little is known about its role in hematopoiesis. In this study, we measured helicase-like transcription factor mRNA expression in the bone marrow of 204 adult patients with de novo acute myeloid leukemia. Patients were dichotomized into low and high expression groups at the median level for clinicopathological correlations. Helicase-like transcription factor levels were dramatically reduced in the low expression patient group compared to those in the normal controls (n=40) (P<0.0001). Low helicase-like transcription factor expression correlated positively with French-American-British M4/M5 subtypes (P<0.0001) and complex cytogenetic abnormalities (P=0.02 for ≥3 abnormalities;P=0.004 for ≥5 abnormalities) but negatively with CEBPA double mutations (P=0.012). Also, low expression correlated with poorer overall (P=0.005) and event-free (P=0.006) survival in the intermediate-risk cytogenetic subgroup. Consistent with the more aggressive disease associated with low expression, helicase-like transcription factor knockdown in leukemic cells promoted proliferation and chromosomal instability that was accompanied by downregulation of mitotic regulators and impaired DNA damage response. The significance of helicase-like transcription factor in genome maintenance was further indicated by its markedly elevated expression in normal human CD34(+)hematopoietic stem cells. We further demonstrated that helicase-like transcription factor was a RUNX1 target and transcriptionally repressed by RUNX1-ETO and site-specific DNA methylation through a duplicated RUNX1 binding site in its promoter. Taken together, our findings provide new mechanistic insights on genomic instability linked to helicase-like transcription factor deregulation, and strongly suggest a tumor suppressor function of the SWI/SNF protein in acute myeloid leukemia.
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Affiliation(s)
- Chi Keung Cheng
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Natalie P H Chan
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Thomas S K Wan
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Lai Ying Lam
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Coty H Y Cheung
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Terry H Y Wong
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Rosalina K L Ip
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina
| | - Raymond S M Wong
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina Sir Y. K. Pao Centre for Cancer, Prince of Wales Hospital, Hong Kong, Cina
| | - Margaret H L Ng
- Department of Anatomical and Cellular Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Cina State Key Laboratory in Oncology in South China, The Chinese University of Hong Kong, Cina
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173
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Abstract
Toll-like receptors (TLR), a family of pattern-recognition receptors (PRRs) stimulated by pathogen-associated molecular patterns (PAMPs), generate antigen-triggered innate and adaptive immune responses. Recent studies have indicated that several small, regulatory RNAs, called microRNAs (miRNas), are induced by TLR activation in immune cells and that many microRNAs can control the inflammatory process and response to infection by positively or negatively regulating TLR signaling. Among these miRNAs, aberrant microRNA-155 (miR-155) has been implicated in diverse immune processes including the pathogenesis of several autoimmune diseases and cancer. Here, we discuss the role of miR-155 in TLR-mediated and TLR-related immune system regulation. Furthermore, we present our current knowledge of the design, in vivo delivery strategies, and therapeutic efficacy of miR-155 inhibitors in various inflammatory disorders and cancer, including a protocol on the use of miRNA-155 inhibitors in experimental autoimmune encephalomyelitis (EAE).
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Affiliation(s)
- Lucien P Garo
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, 77 Avenue Louis Pasteur, Boston, MA, 02115, USA
| | - Gopal Murugaiyan
- Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital, Harvard Medical School, 77 Avenue Louis Pasteur, Boston, MA, 02115, USA.
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174
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Santovito D, Egea V, Weber C. Small but smart: MicroRNAs orchestrate atherosclerosis development and progression. Biochim Biophys Acta Mol Cell Biol Lipids 2015; 1861:2075-2086. [PMID: 26738655 DOI: 10.1016/j.bbalip.2015.12.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 12/21/2015] [Indexed: 02/07/2023]
Abstract
MicroRNAs (miRNAs) are short non-coding RNA able to bind specific sequences on target messenger RNAs (mRNAs) and thereby to post-transcriptionally modulate gene expression. Being expressed in all vertebrate cell types, miRNAs have emerged as key players in a wide array of biological processes, including cell proliferation, differentiation and apoptosis. Over the past decade, knowledge concerning the contribution of miRNAs to human pathology has grown with an astonishing pace. In particular, a major involvement of miRNAs in atherosclerosis as a leading cause of global mortality has been supported by ample evidence from in vitro, in vivo and clinical studies. This review aims to summarize and highlight current concepts of miRNA function in the continuum of atherogenesis ranging from risk factors (i.e. dyslipidemia, diabetes, hypertension), to endothelial dysfunction up to the events leading to plaque rupture. Areas in need for further research and potential perspectives for translational applications will be scrutinized. This article is part of a Special Issue entitled: MicroRNAs and lipid/energy metabolism and related diseases edited by Carlos Fernández-Hernando and Yajaira Suárez.
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Affiliation(s)
- Donato Santovito
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Virginia Egea
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Christian Weber
- Institute for Cardiovascular Prevention, Ludwig-Maximilians-University Munich, Munich, Germany; German Centre for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany.
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175
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Possible Biomarkers in Blood for Crohn's Disease: Oxidative Stress and MicroRNAs-Current Evidences and Further Aspects to Unravel. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2016:2325162. [PMID: 26823944 PMCID: PMC4707323 DOI: 10.1155/2016/2325162] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 09/29/2015] [Accepted: 10/05/2015] [Indexed: 12/14/2022]
Abstract
Crohn's disease (CD) is an inflammatory disorder characterised by a transmural inflammation of the intestinal wall. Although the physiopathology of the disease is not yet fully understood, it is clear that the immune response plays an important role in it. This hyperreactive immune system is accompanied by the presence of unregulated reactive oxygen species (ROS). These elements are modulated in normal conditions by different elements, including enzymes that function as antioxidant defences preventing the harmful effects of ROS. However, in CD there is an imbalance between ROS production and these antioxidant elements, resulting in oxidative stress (OxS) phenomena. In fact, now OxS is being considered more a potential etiological factor for Crohn's disease rather than a concomitant effect in the disease. The persistence of the OxS can also be influencing the evolution of the disease. Furthermore, the epigenetic mechanisms, above all microRNAs, are being considered key elements in the pathogenesis of CD. These elements and the presence of OxS have also been linked to several diseases. We, therefore, describe in this review the most significant findings related to oxidative stress and microRNAs profiles in the peripheral blood of CD patients.
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176
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Nakagawa R, Leyland R, Meyer-Hermann M, Lu D, Turner M, Arbore G, Phan TG, Brink R, Vigorito E. MicroRNA-155 controls affinity-based selection by protecting c-MYC+ B cells from apoptosis. J Clin Invest 2015; 126:377-88. [PMID: 26657861 DOI: 10.1172/jci82914] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 10/26/2015] [Indexed: 12/13/2022] Open
Abstract
The production of high-affinity antibodies by B cells is essential for pathogen clearance. Antibody affinity for antigen is increased through the affinity maturation in germinal centers (GCs). This is an iterative process in which B cells cycle between proliferation coupled with the acquisition of mutations and antigen-based positive selection, resulting in retention of the highest-affinity B cell clones. The posttranscriptional regulator microRNA-155 (miR-155) is critical for efficient affinity maturation and the maintenance of the GCs; however, the cellular and molecular mechanism by which miR-155 regulates GC responses is not well understood. Here, we utilized a miR-155 reporter mouse strain and showed that miR-155 is coexpressed with the proto-oncogene encoding c-MYC in positively selected B cells. Functionally, miR-155 protected positively selected c-MYC+ B cells from apoptosis, allowing clonal expansion of this population, providing an explanation as to why Mir155 deletion impairs affinity maturation and promotes the premature collapse of GCs. We determined that miR-155 directly inhibits the Jumonji family member JARID2, which enhances B cell apoptosis when overexpressed, and thereby promotes GC B cell survival. Our findings also suggest that there is cooperation between c-MYC and miR-155 during the normal GC response, a cooperation that may explain how c-MYC and miR-155 can collaboratively function as oncogenes.
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177
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Function and significance of MicroRNAs in benign and malignant human stem cells. Semin Cancer Biol 2015; 35:200-11. [DOI: 10.1016/j.semcancer.2015.07.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 07/09/2015] [Accepted: 07/13/2015] [Indexed: 12/16/2022]
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178
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Abstract
Recent years have witnessed the discovery of several classes of noncoding RNAs (ncRNAs), which are indispensable for the regulation of cellular processes. Many of these RNAs are regulatory in nature with functions in gene expression regulation such as piwi-interacting RNAs, small interfering RNAs and micro RNAs. Long noncoding RNAs (lncRNAs) comprise the most recently characterized class. LncRNAs are involved in transcriptional regulation, chromatin remodeling, imprinting, splicing, and translation, among other critical functions in the cell. Recent studies have elucidated the importance of lncRNAs in hematopoietic development. Dysregulation of lncRNA expression is a feature of various diseases and cancers, and is also seen in hematopoietic malignancies. This article focuses on lncRNAs that have been implicated in the pathogenesis of hematopoietic malignancies.
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Affiliation(s)
- Norma I Rodríguez-Malavé
- Cellular and Molecular Pathology Program, Department of Pathology and Laboratory Medicine, University of California Los Angeles, Department of Pathology and Laboratory Medicine, Jonsson Comprehensive Cancer Center and Broad Stem Cell Research Center, University of California Los Angeles Cellular and Molecular Pathology Program, Department of Pathology and Laboratory Medicine, University of California Los Angeles, Department of Pathology and Laboratory Medicine, Jonsson Comprehensive Cancer Center and Broad Stem Cell Research Center, University of California Los Angeles
| | - Dinesh S Rao
- Cellular and Molecular Pathology Program, Department of Pathology and Laboratory Medicine, University of California Los Angeles, Department of Pathology and Laboratory Medicine, Jonsson Comprehensive Cancer Center and Broad Stem Cell Research Center, University of California Los Angeles Cellular and Molecular Pathology Program, Department of Pathology and Laboratory Medicine, University of California Los Angeles, Department of Pathology and Laboratory Medicine, Jonsson Comprehensive Cancer Center and Broad Stem Cell Research Center, University of California Los Angeles Cellular and Molecular Pathology Program, Department of Pathology and Laboratory Medicine, University of California Los Angeles, Department of Pathology and Laboratory Medicine, Jonsson Comprehensive Cancer Center and Broad Stem Cell Research Center, University of California Los Angeles
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179
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Podsiad A, Standiford TJ, Ballinger MN, Eakin R, Park P, Kunkel SL, Moore BB, Bhan U. MicroRNA-155 regulates host immune response to postviral bacterial pneumonia via IL-23/IL-17 pathway. Am J Physiol Lung Cell Mol Physiol 2015; 310:L465-75. [PMID: 26589478 DOI: 10.1152/ajplung.00224.2015] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 11/13/2015] [Indexed: 12/20/2022] Open
Abstract
Postinfluenza bacterial pneumonia is associated with significant mortality and morbidity. MicroRNAs (miRNAs) are small, noncoding RNAs that regulate gene expression posttranscriptionally. miR-155 has recently emerged as a crucial regulator of innate immunity and inflammatory responses and is induced in macrophages during infection. We hypothesized upregulation of miR-155 inhibits IL-17 and increases susceptibility to secondary bacterial pneumonia. Mice were challenged with 100 plaque-forming units H1N1 intranasally and were infected with 10(7) colony-forming units of MRSA intratracheally at day 5 postviral challenge. Lungs were harvested 24 h later, and expression of miR-155, IL-17, and IL-23 was measured by real-time RT-PCR. Induction of miR-155 was 3.6-fold higher in dual-infected lungs compared with single infection. miR-155(-/-) mice were protected with significantly lower (4-fold) bacterial burden and no differences in viral load, associated with robust induction of IL-23 and IL-17 (2.2- and 4.8-fold, respectively) postsequential challenge with virus and bacteria, compared with WT mice. Treatment with miR-155 antagomir improved lung bacterial clearance by 4.2-fold compared with control antagomir postsequential infection with virus and bacteria. Moreover, lung macrophages collected from patients with postviral bacterial pneumonia also had upregulation of miR-155 expression compared with healthy controls, consistent with observations in our murine model. This is the first demonstration that cellular miRNAs regulate postinfluenza immune response to subsequent bacterial challenge by suppressing the IL-17 pathway in the lung. Our findings suggest that antagonizing certain microRNA might serve as a potential therapeutic strategy against secondary bacterial infection.
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Affiliation(s)
- Amy Podsiad
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Michigan Medical Center, Ann Arbor, Michigan
| | - Theodore J Standiford
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Michigan Medical Center, Ann Arbor, Michigan
| | - Megan N Ballinger
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Ohio State University, Columbus, Ohio; and
| | - Richard Eakin
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Michigan Medical Center, Ann Arbor, Michigan
| | - Pauline Park
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Michigan Medical Center, Ann Arbor, Michigan
| | - Steven L Kunkel
- Department of Pathology, University of Michigan Medical Center, Ann Arbor, Michigan
| | - Bethany B Moore
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Michigan Medical Center, Ann Arbor, Michigan
| | - Urvashi Bhan
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, University of Michigan Medical Center, Ann Arbor, Michigan;
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180
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Sang W, Zhang C, Zhang D, Wang Y, Sun C, Niu M, Sun X, Zhou C, Zeng L, Pan B, Chen W, Yan D, Zhu F, Wu Q, Cao J, Zhao K, Chen C, Li Z, Li D, Loughran TP, Xu K. MicroRNA-181a, a potential diagnosis marker, alleviates acute graft versus host disease by regulating IFN-γ production. Am J Hematol 2015. [PMID: 26223969 DOI: 10.1002/ajh.24136] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is a valuable therapeutic strategy for a wide variety of diseases. Acute graft-versus-host disease (aGVHD) is a major complication in up to 75% of allo-HSCT. The absence of a reliable predicative marker for aGVHD onset prevents preemptive treatment and impedes widespread and successful application of this therapy. In this study we found that after allo-HSCT, the levels of miR-181a were reduced significantly prior to the onset of aGVHD. More importantly, the degree of its reduction correlated with the severity of aGVHD. Mechanistically, miR-181a affects the function of T lymphocytes by down-regulating IFN-γ in a dose-dependent manner. Meanwhile, we confirmed that miR-181a can effectively preserve the anti-leukemic effect in vitro. Using a murine allo-HSCT model, we demonstrated that murine miR-181b, the human miR-181a homolog, served as an effective predictor of aGVHD. Moreover, expression of this microRNA ameliorated the severity of aGVHD. Collectively, these results show that the level of miR-181a may serve as a reliable marker for the diagnosis and prognosis the onset of aGVHD. Am. J. Hematol. 90:998-1007, 2015. © 2015 Wiley Periodicals, Inc.
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Affiliation(s)
- Wei Sang
- The First Clinical Medical College of Nanjing Medical University; Nanjing China
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Cong Zhang
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Dianzheng Zhang
- Department of Biochemistry and Molecular Biology; Philadelphia College of Osteopathic Medicine; Philadelphia Pennsylvania
| | - Ying Wang
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Cai Sun
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Mingshan Niu
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Xiaoshen Sun
- Department of Medicine; Penn State Hershey Cancer Institute; Hershey Pennsylvania
| | - Cui Zhou
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Lingyu Zeng
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Bin Pan
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Wei Chen
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Dongmei Yan
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Feng Zhu
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Qingyun Wu
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Jiang Cao
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Kai Zhao
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Chong Chen
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Zhenyu Li
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | - Depeng Li
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
| | | | - Kailin Xu
- The Key Laboratory of Transplantation Immunity; Affiliated Hospital of Xuzhou Medical College; Xuzhou China
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181
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Zhuang Z, qin X, Hu H, Tian SY, Lu ZJ, Zhang TZ, Bai YL. Down-regulation of microRNA-155 attenuates retinal neovascularization via the PI3K/Akt pathway. Mol Vis 2015; 21:1173-84. [PMID: 26539029 PMCID: PMC4605754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 10/11/2015] [Indexed: 11/25/2022] Open
Abstract
PURPOSE We aimed to investigate the anti-angiogenic properties of miR-155 via in vitro and in vivo studies. METHODS miR-155 was knocked down using lentivirus-mediated RNA interference. The proliferation, migration, and tube formation of human retinal microvascular endothelial cells (HRMECs) were measured using BrdU, Transwell, and Matrigel assays, respectively. An oxygen-induced retinopathy (OIR) model was induced using neonatal C57BL/6J pups. Anti-miR-155 was intravitreally injected on postnatal day 12, and the retinal non-perfused areas and extent of neovascularization were measured on postnatal day 18 using transcardiovascular fluorescein isothiocyanate (FITC)-dextran perfusion and retina sections. A laser-induced choroidal neovascularization (CNV) model was induced in adult C57BL/6J mice. To evaluate the leakage areas, fundus fluorescein angiography was performed on day 14 after anti-miR-155 intravitreal injection. The neovascularization area of the CNV model was also examined in confocal and retina section studies. The expression levels of SHIP1 and p-Akt (Thr308, Ser473, and Thr450) were evaluated both in vitro and in vivo. RESULTS The expression of miR-155 was elevated in HRMECs after treatment with vascular endothelial growth factor (VEGF) and in neovascularized mouse model retinas. Anti-miR-155 lentivirus reduced the VEGF-induced proliferation, migration, and tube formation abilities of HRMECs. Anti-miR-155 attenuated retinal neovascularization in in vivo CNV and OIR models. In VEGF-treated HRMECs and retina neovascularization models, p-Akt (Ser473) was significantly upregulated, while SHIP1 was downregulated. Conversely, the inhibition of miR-155 restored the expression of SHIP1 and reduced the phosphorylation of effectors in the Akt (Ser473) signaling pathway. CONCLUSIONS The results revealed that the downregulation of miR-155 attenuated retinal neovascularization via the phosphatidylinositol 3-kinase (PI3K)/Akt pathway.
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Affiliation(s)
- Zhi Zhuang
- Medical College, Inner Mongolia University for the Nationalities, Tongliao Inner Mongolia, China
| | - Xiao- qin
- Department of Ophthalmology, Affiliated Hospital of Inner Mongolia University for the Nationalities, Tongliao Inner Mongolia, China
| | - He Hu
- Medical College, Inner Mongolia University for the Nationalities, Tongliao Inner Mongolia, China
| | - Shi-yuan Tian
- Department of Ophthalmology, Affiliated Hospital of Inner Mongolia University for the Nationalities, Tongliao Inner Mongolia, China
| | - Zhan-jun Lu
- Department of Ophthalmology, Affiliated Hospital of Inner Mongolia University for the Nationalities, Tongliao Inner Mongolia, China
| | - Tian-zi Zhang
- Department of Ophthalmology, Affiliated Hospital of Inner Mongolia University for the Nationalities, Tongliao Inner Mongolia, China
| | - Yu-ling Bai
- Department of Ophthalmology, Affiliated Hospital of Inner Mongolia University for the Nationalities, Tongliao Inner Mongolia, China
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182
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Lind EF, Millar DG, Dissanayake D, Savage JC, Grimshaw NK, Kerr WG, Ohashi PS. miR-155 Upregulation in Dendritic Cells Is Sufficient To Break Tolerance In Vivo by Negatively Regulating SHIP1. THE JOURNAL OF IMMUNOLOGY 2015; 195:4632-40. [PMID: 26447227 DOI: 10.4049/jimmunol.1302941] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 08/22/2015] [Indexed: 11/19/2022]
Abstract
TLR-induced maturation of dendritic cells (DCs) leads to the production of proinflammatory cytokines as well as the upregulation of various molecules involved in T cell activation. These are believed to be the critical events that account for the induction of the adaptive immune response. In this study, we have examined the role of miR-155 in DC function and the induction of immunity. Using a model in which the transfer of self-Ag-pulsed, TLR-matured DCs can induce a functional CD8 T cell response and autoimmunity, we find that DCs lacking miR-155 have an impaired ability to break immune tolerance. Importantly, transfer of self- Ag-pulsed DCs overexpressing miR-155 was sufficient to break tolerance in the absence of TLR stimuli. Although these unstimulated DCs induced T cell function in vivo, there was no evidence for the upregulation of costimulatory ligands or cytokine secretion. Further analysis showed that miR-155 influenced the level of the phosphatase SHIP1 in DCs and that the lack of SHIP1 in DCs was sufficient to break T cell tolerance in vivo, again in the absence of TLR-induced DC maturation. Our study demonstrates that the overexpression of miR-155 in DCs is a critical event that is alone sufficient to break self-tolerance and promote a CD8-mediated autoimmune response in vivo. This process is independent of the induction of conventional DC maturation markers, indicating that miR-155 regulation of SHIP represents a unique axis that regulates DC function in vivo.
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Affiliation(s)
- Evan F Lind
- Campbell Family Institute for Breast Cancer Research, Princess Margaret Cancer Centre, Toronto, Ontario M5G 2C1, Canada; Department of Molecular Microbiology and Immunology, Oregon Health and Sciences University, Portland, OR 97239
| | - Douglas G Millar
- Campbell Family Institute for Breast Cancer Research, Princess Margaret Cancer Centre, Toronto, Ontario M5G 2C1, Canada
| | - Dilan Dissanayake
- Campbell Family Institute for Breast Cancer Research, Princess Margaret Cancer Centre, Toronto, Ontario M5G 2C1, Canada; Department of Immunology, University of Toronto, University Health Network, Toronto, Ontario M5G 2C1, Canada
| | - Jonathan C Savage
- Department of Molecular Microbiology and Immunology, Oregon Health and Sciences University, Portland, OR 97239
| | - Natasha K Grimshaw
- Campbell Family Institute for Breast Cancer Research, Princess Margaret Cancer Centre, Toronto, Ontario M5G 2C1, Canada
| | - William G Kerr
- Department of Microbiology and Immunology, State University of New York Upstate Medical University, Syracuse, NY 13210; and Department of Pediatrics, State University of New York Upstate Medical University, Syracuse, NY 13210
| | - Pamela S Ohashi
- Campbell Family Institute for Breast Cancer Research, Princess Margaret Cancer Centre, Toronto, Ontario M5G 2C1, Canada; Department of Immunology, University of Toronto, University Health Network, Toronto, Ontario M5G 2C1, Canada;
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183
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Abstract
Inflammatory responses are essential for the clearance of pathogens and the repair of injured tissues; however, if these responses are not properly controlled chronic inflammation can occur. Chronic inflammation is now recognized as a contributing factor to many age-associated diseases including metabolic disorders, arthritis, neurodegeneration, and cardiovascular disease. Due to the connection between chronic inflammation and these diseases, it is essential to understand underlying mechanisms behind this process. In this review, factors that contribute to chronic inflammation are discussed. Further, we emphasize the emerging roles of microRNAs (miRNAs) and other noncoding RNAs (ncRNA) in regulating chronic inflammatory states, making them important future diagnostic markers and therapeutic targets.
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Affiliation(s)
- Margaret Alexander
- Department of Pathology, Division of Microbiology and ImmunologyUniversity of UtahSalt Lake CityUTUSA
| | - Ryan M. O'Connell
- Department of Pathology, Division of Microbiology and ImmunologyUniversity of UtahSalt Lake CityUTUSA
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184
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Yang H, Wang Y. Five miRNAs considered as molecular targets for predicting neuroglioma. Tumour Biol 2015; 37:1051-9. [PMID: 26269115 DOI: 10.1007/s13277-015-3898-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Accepted: 08/05/2015] [Indexed: 02/04/2023] Open
Abstract
Neuroglioma is a complex neuroglial tumor involving dysregulation of many biological pathways at multiple levels. Here, we aim to screen differentially expressed miRNAs (DEMs) as well as the functions and pathways of their target genes in neuroglioma. miRNA high-throughput sequencing data were downloaded from The Cancer Genome Atlas (TCGA), and then the DEMs were subjected to perform principal component analysis (PCA) based on their expression values. Following that, Targetscan software was used to predict the target genes, and enrichment analysis and pathway annotation of these target genes were done by DAVID and KEGG, respectively. Finally, survival analysis between the DEMs and patients' survival time was done, and the miRNAs with prediction potential were obtained. A total of 33 DEMs were obtained, among which 25 miRNAs were upregulated including hsa-mir-675, hsa-mir-196a-1, and hsa-mir-196a-2, while eight miRNAs were downregulated including hsa-mir-1911, hsa-mir-1264, and hsa-mir-1298. Five miRNAs with diagnostic and preventive potentials were significantly correlated with survival time, including has-mir-155, has-mir-199b, has-mi-10a, has-mir-1274b, and has-mir-455. The target genes of miRNA identified in this study played important roles in tumor signaling pathways, and their detailed functions could be further studied so as to explore novel neuroglioma therapies.
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Affiliation(s)
- Haiyuan Yang
- Jiangsu Key Laboratory of Xenotransplantation, Nanjing Medical University, 140# Hanzhong Road, Nanjing, Jiangsu, 210029, China
| | - Ying Wang
- Jiangsu Key Laboratory of Xenotransplantation, Nanjing Medical University, 140# Hanzhong Road, Nanjing, Jiangsu, 210029, China.
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185
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Wang L, Li G, Yao ZQ, Moorman JP, Ning S. MicroRNA regulation of viral immunity, latency, and carcinogenesis of selected tumor viruses and HIV. Rev Med Virol 2015; 25:320-41. [PMID: 26258805 DOI: 10.1002/rmv.1850] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Revised: 06/09/2015] [Accepted: 06/28/2015] [Indexed: 12/11/2022]
Abstract
MicroRNAs (miRNAs) function as key regulators in immune responses and cancer development. In the contexts of infection with oncogenic viruses, miRNAs are engaged in viral persistence, latency establishment and maintenance, and oncogenesis. In this review, we summarize the potential roles and mechanisms of viral and cellular miRNAs in the host-pathogen interactions during infection with selected tumor viruses and HIV, which include (i) repressing viral replication and facilitating latency establishment by targeting viral transcripts, (ii) evading innate and adaptive immune responses via toll-like receptors, RIG-I-like receptors, T-cell receptor, and B-cell receptor pathways by targeting signaling molecules such as TRAF6, IRAK1, IKKε, and MyD88, as well as downstream targets including regulatory cytokines such as tumor necrosis factor α, interferon γ, interleukin 10, and transforming growth factor β, (iii) antagonizing intrinsic and extrinsic apoptosis pathways by targeting pro-apoptotic or anti-apoptotic gene transcripts such as the Bcl-2 family and caspase-3, (iv) modulating cell proliferation and survival through regulation of the Wnt, PI3K/Akt, Erk/MAPK, and Jak/STAT signaling pathways, as well as the signaling pathways triggered by viral oncoproteins such as Epstein-Barr Virus LMP1, by targeting Wnt-inhibiting factor 1, SHIP, pTEN, and SOCSs, and (v) regulating cell cycle progression by targeting cell cycle inhibitors such as p21/WAF1 and p27/KIP1. Further elucidation of the interaction between miRNAs and these key biological events will facilitate our understanding of the pathogenesis of viral latency and oncogenesis and may lead to the identification of miRNAs as novel targets for developing new therapeutic or preventive interventions.
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Affiliation(s)
- Ling Wang
- Center of Excellence for Inflammation, Infectious Diseases and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.,Division of Infectious Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Guangyu Li
- Center of Excellence for Inflammation, Infectious Diseases and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.,Division of Infectious Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
| | - Zhi Q Yao
- Center of Excellence for Inflammation, Infectious Diseases and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.,Division of Infectious Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.,Hepatitis (HCV/HIV) Program, James H Quillen VA Medical Center, Johnson City, TN, USA
| | - Jonathan P Moorman
- Center of Excellence for Inflammation, Infectious Diseases and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.,Division of Infectious Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.,Hepatitis (HCV/HIV) Program, James H Quillen VA Medical Center, Johnson City, TN, USA
| | - Shunbin Ning
- Center of Excellence for Inflammation, Infectious Diseases and Immunity, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA.,Division of Infectious Diseases, Department of Internal Medicine, Quillen College of Medicine, East Tennessee State University, Johnson City, TN, USA
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186
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Antagonistic Interplay between MicroRNA-155 and IL-10 during Lyme Carditis and Arthritis. PLoS One 2015; 10:e0135142. [PMID: 26252010 PMCID: PMC4529177 DOI: 10.1371/journal.pone.0135142] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 07/17/2015] [Indexed: 12/27/2022] Open
Abstract
MicroRNA-155 has been shown to play a role in immune activation and inflammation, and is suppressed by IL-10, an important anti-inflammatory cytokine. The established involvement of IL-10 in the murine model of Borrelia burgdorferi-induced Lyme arthritis and carditis allowed us to assess the interplay between IL-10 and miR-155 in vivo. As reported previously, Mir155 was highly upregulated in joints from infected severely arthritic B6 Il10-/- mice, but not in mildly arthritic B6 mice. In infected hearts, Mir155 was upregulated in both strains, suggesting a role of miR-155 in Lyme carditis. Using B. burgdorferi-infected B6, Mir155-/-, Il10-/-, and Mir155-/- Il10-/- double-knockout (DKO) mice, we found that anti-inflammatory IL-10 and pro-inflammatory miR-155 have opposite and somewhat compensatory effects on myeloid cell activity, cytokine production, and antibody response. Both IL-10 and miR-155 were required for suppression of Lyme carditis. Infected Mir155-/- mice developed moderate/severe carditis, had higher B. burgdorferi numbers, and had reduced Th1 cytokine expression in hearts. In contrast, while Il10-/- and DKO mice also developed severe carditis, hearts had reduced bacterial numbers and elevated Th1 and innate cytokine expression. Surprisingly, miR-155 had little effect on Lyme arthritis. These results show that antagonistic interplay between IL-10 and miR-155 is required to balance host defense and immune activation in vivo, and this balance is particularly important for suppression of Lyme carditis. These results also highlight tissue-specific differences in Lyme arthritis and carditis pathogenesis, and reveal the importance of IL-10-mediated regulation of miR-155 in maintaining healthy immunity.
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187
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Salemi D, Cammarata G, Agueli C, Augugliaro L, Corrado C, Bica MG, Raimondo S, Marfia A, Randazzo V, Dragotto P, Di Raimondo F, Alessandro R, Fabbiano F, Santoro A. miR-155 regulative network in FLT3 mutated acute myeloid leukemia. Leuk Res 2015; 39:883-96. [DOI: 10.1016/j.leukres.2015.04.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Revised: 04/16/2015] [Accepted: 04/23/2015] [Indexed: 12/26/2022]
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188
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189
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Maltby S, Plank M, Ptaschinski C, Mattes J, Foster PS. MicroRNA function in mast cell biology: protocols to characterize and modulate microRNA expression. Methods Mol Biol 2015; 1220:287-304. [PMID: 25388258 DOI: 10.1007/978-1-4939-1568-2_18] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
MicroRNAs (miRNAs) are small noncoding RNA molecules that can modulate mRNA levels through RNA-induced silencing complex (RISC)-mediated degradation. Recognition of target mRNAs occurs through imperfect base pairing between an miRNA and its target, meaning that each miRNA can target a number of different mRNAs to modulate gene expression. miRNAs have been proposed as novel therapeutic targets and many studies are aimed at characterizing miRNA expression patterns and functions within a range of cell types. To date, limited research has focused on the function of miRNAs specifically in mast cells; however, this is an emerging field. In this chapter, we will briefly overview miRNA synthesis and function and the current understanding of miRNAs in hematopoietic development and immune function, emphasizing studies related to mast cell biology. The chapter will conclude with fundamental techniques used in miRNA studies, including RNA isolation, real-time PCR and microarray approaches for quantification of miRNA expression levels, and antagomir design to interfere with miRNA function.
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Affiliation(s)
- Steven Maltby
- Priority Research Centre for Asthma and Respiratory Diseases, School of Biomedical Sciences and Pharmacy, Faculty of Health, University of Newcastle, Lot 1 Kookaburra Circuit, New Lambton Heights, NSW, 2305, Australia,
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190
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MicroRNA-551b is highly expressed in hematopoietic stem cells and a biomarker for relapse and poor prognosis in acute myeloid leukemia. Leukemia 2015; 30:742-6. [PMID: 26108690 DOI: 10.1038/leu.2015.160] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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191
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Alexander M, Hu R, Runtsch MC, Kagele DA, Mosbruger TL, Tolmachova T, Seabra MC, Round JL, Ward DM, O'Connell RM. Exosome-delivered microRNAs modulate the inflammatory response to endotoxin. Nat Commun 2015; 6:7321. [PMID: 26084661 PMCID: PMC4557301 DOI: 10.1038/ncomms8321] [Citation(s) in RCA: 560] [Impact Index Per Article: 62.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 04/27/2015] [Indexed: 12/13/2022] Open
Abstract
MicroRNAs regulate gene expression posttranscriptionally and function within the cells in which they are transcribed. However, recent evidence suggests that microRNAs can be transferred between cells and mediate target gene repression. We find that endogenous miR-155 and miR-146a, two critical microRNAs that regulate inflammation, are released from dendritic cells within exosomes and are subsequently taken up by recipient dendritic cells. Following uptake, exogenous microRNAs mediate target gene repression and can reprogramme the cellular response to endotoxin, where exosome-delivered miR-155 enhances while miR-146a reduces inflammatory gene expression. We also find that miR-155 and miR-146a are present in exosomes and pass between immune cells in vivo, as well as demonstrate that exosomal miR-146a inhibits while miR-155 promotes endotoxin-induced inflammation in mice. Together, our findings provide strong evidence that endogenous microRNAs undergo a functional transfer between immune cells and constitute a mechanism of regulating the inflammatory response. Response to inflammatory stimuli such as endotoxin is coordinated at many levels. Here, the authors show that two microRNAs known to regulate inflammatory response inside the cell are secreted by dendritic cells and modulate inflammatory signalling in the neighbouring cells.
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Affiliation(s)
- Margaret Alexander
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, 4280 JMRB, 15 North Medical Drive East, Salt Lake City, Utah 84112, USA
| | - Ruozhen Hu
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, 4280 JMRB, 15 North Medical Drive East, Salt Lake City, Utah 84112, USA
| | - Marah C Runtsch
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, 4280 JMRB, 15 North Medical Drive East, Salt Lake City, Utah 84112, USA
| | - Dominique A Kagele
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, 4280 JMRB, 15 North Medical Drive East, Salt Lake City, Utah 84112, USA
| | - Timothy L Mosbruger
- Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, Utah 84112, USA
| | - Tanya Tolmachova
- Molecular Medicine Section, National Heart and Lung Institute, Imperial College London, London SW7 2AZ, UK
| | - Miguel C Seabra
- Molecular Medicine Section, National Heart and Lung Institute, Imperial College London, London SW7 2AZ, UK
| | - June L Round
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, 4280 JMRB, 15 North Medical Drive East, Salt Lake City, Utah 84112, USA
| | - Diane M Ward
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, 4280 JMRB, 15 North Medical Drive East, Salt Lake City, Utah 84112, USA
| | - Ryan M O'Connell
- Division of Microbiology and Immunology, Department of Pathology, University of Utah, 4280 JMRB, 15 North Medical Drive East, Salt Lake City, Utah 84112, USA
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192
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Yan M, Wen J, Liang M, Lu Y, Kamata M, Chen ISY. Modulation of Gene Expression by Polymer Nanocapsule Delivery of DNA Cassettes Encoding Small RNAs. PLoS One 2015; 10:e0127986. [PMID: 26035832 PMCID: PMC4452785 DOI: 10.1371/journal.pone.0127986] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 04/21/2015] [Indexed: 01/25/2023] Open
Abstract
Small RNAs, including siRNAs, gRNAs and miRNAs, modulate gene expression and serve as potential therapies for human diseases. Delivery to target cells remains the fundamental limitation for use of these RNAs in humans. To address this challenge, we have developed a nanocapsule delivery technology that encapsulates small DNA molecules encoding RNAs into a small (30nm) polymer nanocapsule. For proof of concept, we transduced DNA expression cassettes for three small RNAs. In one application, the DNA cassette encodes an shRNA transcriptional unit that downregulates CCR5 and protects from HIV-1 infection. The DNA cassette nanocapsules were further engineered for timed release of the DNA cargo for prolonged knockdown of CCR5. Secondly, the nanocapsules provide an efficient means for delivery of gRNAs in the CRISPR/Cas9 system to mutate integrated HIV-1. Finally, delivery of microRNA-125b to mobilized human CD34+ cells enhances survival and expansion of the CD34+ cells in culture.
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Affiliation(s)
- Ming Yan
- Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California, United States of America
- California NanoSystems Institute (CNSI), University of California Los Angeles, Los Angeles, California, United States of America
- University of California Los Angeles AIDS Institute, Los Angeles, California, United States of America
| | - Jing Wen
- Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California, United States of America
- University of California Los Angeles AIDS Institute, Los Angeles, California, United States of America
| | - Min Liang
- Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California, United States of America
| | - Yunfeng Lu
- Department of Biomolecular and Chemical Engineering, University of California Los Angeles, Los Angeles, California, United States of America
- California NanoSystems Institute (CNSI), University of California Los Angeles, Los Angeles, California, United States of America
| | - Masakazu Kamata
- Division of Hematology-Oncology, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California, United States of America
- University of California Los Angeles AIDS Institute, Los Angeles, California, United States of America
| | - Irvin S. Y. Chen
- Department of Microbiology, Immunology, and Molecular Genetics, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California, United States of America
- University of California Los Angeles AIDS Institute, Los Angeles, California, United States of America
- * E-mail:
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193
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Khalife J, Radomska HS, Santhanam R, Huang X, Neviani P, Saultz J, Wang H, Wu YZ, Alachkar H, Anghelina M, Dorrance A, Curfman J, Bloomfield CD, Medeiros BC, Perrotti D, Lee LJ, Lee RJ, Caligiuri MA, Pichiorri F, Croce CM, Garzon R, Guzman ML, Mendler JH, Marcucci G. Pharmacological targeting of miR-155 via the NEDD8-activating enzyme inhibitor MLN4924 (Pevonedistat) in FLT3-ITD acute myeloid leukemia. Leukemia 2015; 29:1981-92. [PMID: 25971362 DOI: 10.1038/leu.2015.106] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 02/17/2015] [Accepted: 04/09/2015] [Indexed: 12/20/2022]
Abstract
High levels of microRNA-155 (miR-155) are associated with poor outcome in acute myeloid leukemia (AML). In AML, miR-155 is regulated by NF-κB, the activity of which is, in part, controlled by the NEDD8-dependent ubiquitin ligases. We demonstrate that MLN4924, an inhibitor of NEDD8-activating enzyme presently being evaluated in clinical trials, decreases binding of NF-κB to the miR-155 promoter and downregulates miR-155 in AML cells. This results in the upregulation of the miR-155 targets SHIP1, an inhibitor of the PI3K/Akt pathway, and PU.1, a transcription factor important for myeloid differentiation, leading to monocytic differentiation and apoptosis. Consistent with these results, overexpression of miR-155 diminishes MLN4924-induced antileukemic effects. In vivo, MLN4924 reduces miR-155 expression and prolongs the survival of mice engrafted with leukemic cells. Our study demonstrates the potential of miR-155 as a novel therapeutic target in AML via pharmacologic interference with NF-κB-dependent regulatory mechanisms. We show the targeting of this oncogenic microRNA with MLN4924, a compound presently being evaluated in clinical trials in AML. As high miR-155 levels have been consistently associated with aggressive clinical phenotypes, our work opens new avenues for microRNA-targeting therapeutic approaches to leukemia and cancer patients.
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Affiliation(s)
- J Khalife
- Program of Molecular, Cellular, and Developmental Biology, The Ohio State University, Columbus, OH, USA
| | - H S Radomska
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - R Santhanam
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - X Huang
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - P Neviani
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - J Saultz
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - H Wang
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - Y-Z Wu
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - H Alachkar
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - M Anghelina
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - A Dorrance
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - J Curfman
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - C D Bloomfield
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - B C Medeiros
- Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - D Perrotti
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - L J Lee
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, OH, USA.,Nanoscale Science and Engineering Center for Affordable Nanoengineering of Polymeric Biomedical Devices, The Ohio State University, Columbus, OH, USA
| | - R J Lee
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA.,Division of Pharmaceutics, College of Pharmacy, The Ohio State University, Columbus, OH, USA
| | - M A Caligiuri
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - F Pichiorri
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - C M Croce
- Department of Molecular Virology, Immunology and Cancer Genetics, The Ohio State University and The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - R Garzon
- The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - M L Guzman
- Division of Hematology & Medical Oncology, Department of Medicine, Weill Cornell Medical College, New York, NY, USA
| | - J H Mendler
- James P. Wilmot Cancer Center and Department of Medicine, University of Rochester, Rochester, NY, USA
| | - G Marcucci
- Division of Hematopoietic Stem Cell & Leukemia Research, Department of Hematology & HCT, Gehr Family Center for Leukemia, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
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194
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Wang L, Zhang H, Rodriguez S, Cao L, Parish J, Mumaw C, Zollman A, Kamoka MM, Mu J, Chen DZ, Srour EF, Chitteti BR, HogenEsch H, Tu X, Bellido TM, Boswell HS, Manshouri T, Verstovsek S, Yoder MC, Kapur R, Cardoso AA, Carlesso N. Notch-dependent repression of miR-155 in the bone marrow niche regulates hematopoiesis in an NF-κB-dependent manner. Cell Stem Cell 2015; 15:51-65. [PMID: 24996169 DOI: 10.1016/j.stem.2014.04.021] [Citation(s) in RCA: 151] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 03/26/2014] [Accepted: 04/28/2014] [Indexed: 10/25/2022]
Abstract
The microRNA miR-155 has been implicated in regulating inflammatory responses and tumorigenesis, but its precise role in linking inflammation and cancer has remained elusive. Here, we identify a connection between miR-155 and Notch signaling in this context. Loss of Notch signaling in the bone marrow (BM) niche alters hematopoietic homeostasis and leads to lethal myeloproliferative-like disease. Mechanistically, Notch signaling represses miR-155 expression by promoting binding of RBPJ to the miR-155 promoter. Loss of Notch/RBPJ signaling upregulates miR-155 in BM endothelial cells, leading to miR-155-mediated targeting of the nuclear factor κB (NF-κB) inhibitor κB-Ras1, NF-κB activation, and increased proinflammatory cytokine production. Deletion of miR-155 in the stroma of RBPJ(-/-) mice prevented the development of myeloproliferative-like disease and cytokine induction. Analysis of BM from patients carrying myeloproliferative neoplasia also revealed elevated expression of miR-155. Thus, the Notch/miR-155/κB-Ras1/NF-κB axis regulates the inflammatory state of the BM niche and affects the development of myeloproliferative disorders.
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Affiliation(s)
- Lin Wang
- Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Huajia Zhang
- Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Sonia Rodriguez
- Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Liyun Cao
- Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Jonathan Parish
- Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Christen Mumaw
- Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Amy Zollman
- Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Malgorzata M Kamoka
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Jian Mu
- Department of Computer Science and Engineering, University of Notre Dame, South Bend, IN 46556, USA
| | - Danny Z Chen
- Department of Computer Science and Engineering, University of Notre Dame, South Bend, IN 46556, USA
| | - Edward F Srour
- Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA; Department of Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Brahmananda R Chitteti
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Harm HogenEsch
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN 47907, USA
| | - Xiaolin Tu
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Teresita M Bellido
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - H Scott Boswell
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Taghi Manshouri
- Leukemia Department, MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Srdan Verstovsek
- Leukemia Department, MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Mervin C Yoder
- Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Reuben Kapur
- Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Angelo A Cardoso
- Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Nadia Carlesso
- Wells Center for Pediatric Research, Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
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195
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Khalaj M, Park CY. Notch one up to stroma: endothelial notch prevents inflammation and myeloproliferation. Cell Stem Cell 2015; 15:1-2. [PMID: 24996160 DOI: 10.1016/j.stem.2014.06.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
In this issue of Cell Stem Cell, Wang et al. (2014) describe a signaling axis present in bone marrow stromal cells that suppresses inflammation and myeloid expansions. Loss of endothelial Notch signaling leads to deregulation of miR-155 expression, activation of NF-kB, and increased proinflammatory cytokine production, which promotes a myeloproliferative phenotype.
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Affiliation(s)
- Mona Khalaj
- Human Oncology and Pathogenesis Program, Departments of Pathology and Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Weill Graduate School of Medical Sciences, Cornell University, New York, NY 10065, USA
| | - Christopher Y Park
- Human Oncology and Pathogenesis Program, Departments of Pathology and Laboratory Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Weill Graduate School of Medical Sciences, Cornell University, New York, NY 10065, USA.
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196
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Gulino R, Forte S, Parenti R, Memeo L, Gulisano M. MicroRNA and pediatric tumors: Future perspectives. Acta Histochem 2015; 117:339-54. [PMID: 25765112 DOI: 10.1016/j.acthis.2015.02.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Revised: 02/02/2015] [Accepted: 02/10/2015] [Indexed: 12/20/2022]
Abstract
A better understanding of pediatric tumor biology is needed to allow the development of less toxic and more efficient therapies, as well as to provide novel reliable biomarkers for diagnosis and risk stratification. The emerging role of microRNAs in controlling key pathways implicated in tumorigenesis makes their use in diagnostics a powerful novel tool for the early detection, risk assessment and prognosis, as well as for the development of innovative anticancer therapies. This perspective would be more urgent for the clinical management of pediatric cancer. In this review, we focus on the involvement of microRNAs in the biology of the main childhood tumors, describe their clinical significance and discuss their potential use as novel therapeutic tools and targets.
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Affiliation(s)
- Rosario Gulino
- IOM Ricerca s.r.l., Via Penninazzo 11, 95029 Viagrande, Italy.
| | - Stefano Forte
- IOM Ricerca s.r.l., Via Penninazzo 11, 95029 Viagrande, Italy
| | - Rosalba Parenti
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via Santa Sofia 64, 95127 Catania, Italy
| | - Lorenzo Memeo
- IOM Ricerca s.r.l., Via Penninazzo 11, 95029 Viagrande, Italy
| | - Massimo Gulisano
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via Santa Sofia 64, 95127 Catania, Italy
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197
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MicroRNA-155 aggravates ischemia-reperfusion injury by modulation of inflammatory cell recruitment and the respiratory oxidative burst. Basic Res Cardiol 2015; 110:32. [PMID: 25916938 DOI: 10.1007/s00395-015-0490-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 04/21/2015] [Accepted: 04/22/2015] [Indexed: 11/27/2022]
Abstract
The inflammatory sequelae of ischemia-reperfusion injury (IRI) are a major causal factor of tissue injury in various clinical settings. MicroRNAs (miRs) are short, non-coding RNAs, which regulate protein expression. Here, we investigated the role of miR-155 in IR-related tissue injury. Quantifying microRNA-expression levels in a human muscle tissue after IRI, we found miR-155 expression to be significantly increased and to correlate with the increased expression of TNF-α, IL-1β, CD105, and Caspase3 as well as with leukocyte infiltration. The direct miR-155 target gene SOCS-1 was downregulated. In a mouse model of myocardial infarction, temporary LAD ligation and reperfusion injury resulted in a smaller area of necrosis in miR-155-/- animals compared to wildtype animals. To investigate the underlying mechanisms, we evaluated the effect of miR-155 on inflammatory cell recruitment by intravital microscopy and on the generation of reactive oxygen species (ROS) of macrophages. Our intravital imaging results demonstrated a decreased recruitment of inflammatory cells in miR-155-/- animals during IRI. The generation of ROS in leukocytic cells of miR-155-/- animals was also reduced. RNA silencing of the direct miR-155 target gene SOCS-1 abrogated this effect. In conclusion, miR-155 aggravates the inflammatory response, leukocyte infiltration and tissue damage in IRI via modulation of SOCS-1-dependent generation of ROS. MiR-155 is thus a potential target for the treatment or prevention of IRI.
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198
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Merkel O, Hamacher F, Griessl R, Grabner L, Schiefer AI, Prutsch N, Baer C, Egger G, Schlederer M, Krenn PW, Hartmann TN, Simonitsch-Klupp I, Plass C, Staber PB, Moriggl R, Turner SD, Greil R, Kenner L. Oncogenic role of miR-155 in anaplastic large cell lymphoma lacking the t(2;5) translocation. J Pathol 2015; 236:445-56. [PMID: 25820993 PMCID: PMC4557053 DOI: 10.1002/path.4539] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 03/11/2015] [Accepted: 03/14/2015] [Indexed: 12/20/2022]
Abstract
Anaplastic large cell lymphoma (ALCL) is a rare, aggressive, non-Hodgkin's lymphoma that is characterized by CD30 expression and disease onset in young patients. About half of ALCL patients bear the t(2;5)(p23;q35) translocation, which results in the formation of the nucleophosmin-anaplastic lymphoma tyrosine kinase (NPM–ALK) fusion protein (ALCL ALK+). However, little is known about the molecular features and tumour drivers in ALK-negative ALCL (ALCL ALK−), which is characterized by a worse prognosis. We found that ALCL ALK−, in contrast to ALCL ALK+, lymphomas display high miR-155 expression. Consistent with this, we observed an inverse correlation between miR-155 promoter methylation and miR-155 expression in ALCL. However, no direct effect of the ALK kinase on miR-155 levels was observed. Ago2 immunoprecipitation revealed miR-155 as the most abundant miRNA, and enrichment of target mRNAs C/EBPβ and SOCS1. To investigate its function, we over-expressed miR-155 in ALCL ALK+ cell lines and demonstrated reduced levels of C/EBPβ and SOCS1. In murine engraftment models of ALCL ALK−, we showed that anti-miR-155 mimics are able to reduce tumour growth. This goes hand-in-hand with increased levels of cleaved caspase-3 and high SOCS1 in these tumours, which leads to suppression of STAT3 signalling. Moreover, miR-155 induces IL-22 expression and suppresses the C/EBPβ target IL-8. These data suggest that miR-155 can act as a tumour driver in ALCL ALK− and blocking miR-155 could be therapeutically relevant. Original miRNA array data are to be found in the supplementary material (Table S1). © 2015 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.
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Affiliation(s)
- Olaf Merkel
- Department of Translational Oncology, National Centre for Tumour Diseases (NCT), German Cancer Research Centre (DKFZ), Heidelberg, Germany.,Department of Clinical Pathology, Medical University Vienna, Austria.,European Research Initiative on ALK Related Malignancies (www.erialcl.net)
| | - Frank Hamacher
- Laboratory for Immunological and Molecular Cancer Research, Third Medical Department, Oncologic Centre, Paracelsus Medical University, Salzburg, Austria
| | - Robert Griessl
- Laboratory for Immunological and Molecular Cancer Research, Third Medical Department, Oncologic Centre, Paracelsus Medical University, Salzburg, Austria
| | - Lisa Grabner
- Department of Clinical Pathology, Medical University Vienna, Austria
| | - Ana-Iris Schiefer
- Department of Clinical Pathology, Medical University Vienna, Austria
| | - Nicole Prutsch
- Department of Clinical Pathology, Medical University Vienna, Austria
| | - Constance Baer
- Department of Epigenomics and Cancer Risk Factors, German Cancer Research Centre (DKFZ), Heidelberg, Germany
| | - Gerda Egger
- Department of Clinical Pathology, Medical University Vienna, Austria.,European Research Initiative on ALK Related Malignancies (www.erialcl.net)
| | - Michaela Schlederer
- Department of Clinical Pathology, Medical University Vienna, Austria.,Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria
| | - Peter William Krenn
- Laboratory for Immunological and Molecular Cancer Research, Third Medical Department, Oncologic Centre, Paracelsus Medical University, Salzburg, Austria
| | - Tanja Nicole Hartmann
- Laboratory for Immunological and Molecular Cancer Research, Third Medical Department, Oncologic Centre, Paracelsus Medical University, Salzburg, Austria
| | | | - Christoph Plass
- Department of Epigenomics and Cancer Risk Factors, German Cancer Research Centre (DKFZ), Heidelberg, Germany
| | - Philipp Bernhard Staber
- Division of Hematology and Hemostaseology, Comprehensive Cancer Centre Vienna, Medical University of Vienna, 1090, Vienna, Austria
| | - Richard Moriggl
- Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria.,Institute of Animal Breeding and Genetics, University of Veterinary Medicine Vienna and Medical University of Vienna, Austria
| | - Suzanne D Turner
- Division of Molecular Histopathology, Department of Pathology, University of Cambridge, UK.,European Research Initiative on ALK Related Malignancies (www.erialcl.net)
| | - Richard Greil
- Laboratory for Immunological and Molecular Cancer Research, Third Medical Department, Oncologic Centre, Paracelsus Medical University, Salzburg, Austria
| | - Lukas Kenner
- Department of Clinical Pathology, Medical University Vienna, Austria.,Ludwig Boltzmann Institute for Cancer Research, Vienna, Austria.,Unit of Pathology of Laboratory Animals, University of Veterinary Medicine Vienna, Austria.,European Research Initiative on ALK Related Malignancies (www.erialcl.net)
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199
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MicroRNA transcriptomes of distinct human NK cell populations identify miR-362-5p as an essential regulator of NK cell function. Sci Rep 2015; 5:9993. [PMID: 25909817 PMCID: PMC4408982 DOI: 10.1038/srep09993] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Accepted: 03/25/2015] [Indexed: 12/13/2022] Open
Abstract
Natural killer (NK) cells are critical effectors in the immune response against malignancy and infection, and microRNAs (miRNAs) play important roles in NK cell biology. Here we examined miRNA profiles of human NK cells from different cell compartments (peripheral blood, cord blood, and uterine deciduas) and of NKT and T cells from peripheral blood, and we identified a novel miRNA, miR-362-5p, that is highly expressed in human peripheral blood NK (pNK) cells. We also demonstrated that CYLD, a negative regulator of NF-κB signaling, was a target of miR-362-5p in NK cells. Furthermore, we showed that the over-expression of miR-362-5p enhanced the expression of IFN-γ, perforin, granzyme-B, and CD107a in human primary NK cells, and we found that silencing CYLD with a small interfering RNA (siRNA) mirrored the effect of miR-362-5p over-expression. In contrast, the inhibition of miR-362-5p had the opposite effect in NK cells, which was abrogated by CYLD siRNA, suggesting that miR-362-5p promotes NK-cell function, at least in part, by the down-regulation of CYLD. These results provide a resource for studying the roles of miRNAs in human NK cell biology and contribute to a better understanding of the physiologic significance of miRNAs in the regulation of NK cell function.
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200
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Zhang H, Goudeva L, Immenschuh S, Schambach A, Skokowa J, Eiz-Vesper B, Blasczyk R, Figueiredo C. miR-155 is associated with the leukemogenic potential of the class IV granulocyte colony-stimulating factor receptor in CD34⁺ progenitor cells. Mol Med 2015; 20:736-46. [PMID: 25730818 DOI: 10.2119/molmed.2014.00146] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 12/15/2014] [Indexed: 11/06/2022] Open
Abstract
Granulocyte colony-stimulating factor (G-CSF) is a major regulator of granulopoiesis on engagement with the G-CSF receptor (G-CSFR). The truncated, alternatively spliced, class IV G-CSFR (G-CSFRIV) has been associated with defective differentiation and relapse risk in pediatric acute myeloid leukemia (AML) patients. However, the detailed biological properties of G-CSFRIV in human CD34(+) hematopoietic stem and progenitor cells (HSPCs) and the potential leukemogenic mechanism of this receptor remain poorly understood. In the present study, we observed that G-CSFRIV-overexpressing (G-CSFRIV(+)) HSPCs demonstrated an enhanced proliferative and survival capacity on G-CSF stimulation. Cell cycle analyses showed a higher frequency of G-CSFRIV(+) cells in the S and G2/M phase. Also, apoptosis rates were significantly lower in G-CSFRIV(+) HSPCs. These findings were shown to be associated with a sustained Stat5 activation and elevated miR-155 expression. In addition, G-CSF showed to further induce G-CSFRIV and miR-155 expression of peripheral blood mononuclear cells isolated from AML patients. A Stat5 pharmacological inhibitor or ribonucleic acid (RNA) interference-mediated silencing of the expression of miR-155 abrogated the aberrant proliferative capacity of the G-CSFRIV(+) HSPCs. Hence, the dysregulation of Stat5/miR-155 pathway in the G-CSFRIV(+) HSPCs supports their leukemogenic potential. Specific miRNA silencing or the inhibition of Stat5-associated pathways might contribute to preventing the risk of leukemogenesis in G-CSFRIV(+) HSPCs. This study may promote the development of a personalized effective antileukemia therapy, in particular for the patients exhibiting higher expression levels of G-CSFRIV, and further highlights the necessity of pre-screening the patients for G-CSFR isoforms expression patterns before G-CSF administration.
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Affiliation(s)
- HaiJiao Zhang
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany
| | - Lilia Goudeva
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany
| | - Stephan Immenschuh
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany
| | - Axel Schambach
- Institute of Experimental Hematology, Hannover Medical School, Hannover, Germany.,Excellence Cluster "From Regenerative Biology to Reconstructive Therapies," REBIRTH, Hannover Medical School, Hannover, Germany
| | - Julia Skokowa
- Department of Oncology, Hematology, Immunology, Rheumatology and Pulmonology, University Hospital of Tübingen, Tübingen, Germany
| | - Britta Eiz-Vesper
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany
| | - Rainer Blasczyk
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany.,Excellence Cluster "From Regenerative Biology to Reconstructive Therapies," REBIRTH, Hannover Medical School, Hannover, Germany
| | - Constança Figueiredo
- Institute for Transfusion Medicine, Hannover Medical School, Hannover, Germany.,Excellence Cluster "From Regenerative Biology to Reconstructive Therapies," REBIRTH, Hannover Medical School, Hannover, Germany
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