1
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Varvil MS, dos Santos AP. A review on microRNA detection and expression studies in dogs. Front Vet Sci 2023; 10:1261085. [PMID: 37869503 PMCID: PMC10585042 DOI: 10.3389/fvets.2023.1261085] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 09/12/2023] [Indexed: 10/24/2023] Open
Abstract
MicroRNAs (miRNAs) are small non-coding RNAs that function by post-transcriptional regulation of gene expression. Their stability and abundance in tissue and body fluids makes them promising potential tools for both the diagnosis and prognosis of diseases and attractive therapeutic targets in humans and dogs. Studies of miRNA expression in normal and disease processes in dogs are scarce compared to studies published on miRNA expression in human disease. In this literature review, we identified 461 peer-reviewed papers from database searches using the terms "canine," "dog," "miRNA," and "microRNA"; we screened 244 for inclusion criteria and then included a total of 148 original research peer-reviewed publications relating to specific miRNA expression in canine samples. We found an overlap of miRNA expression changes between the four groups evaluated (normal processes, non-infectious and non-inflammatory conditions, infectious and/or inflammatory conditions, and neoplasia) in 39 miRNAs, 83 miRNAs in three of the four groups, 110 miRNAs in two of the three groups, where 158 miRNAs have only been reported in one of the groups. Additionally, the mechanism of action of these overlapping miRNAs varies depending on the disease process, elucidating a need for characterization of the mechanism of action of each miRNA in each disease process being evaluated. Herein we also draw attention to the lack of standardization of miRNA evaluation, consistency within a single evaluation method, and the need for standardized methods for a direct comparison.
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Affiliation(s)
- Mara S. Varvil
- Department of Comparative Pathobiology, Purdue University, West Lafayette, IN, United States
- Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA, United States
| | - Andrea Pires dos Santos
- Department of Comparative Pathobiology, Purdue University, West Lafayette, IN, United States
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2
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Shang C, Chen Q, Zu F, Ren W. Integrated analysis identified prognostic microRNAs in breast cancer. BMC Cancer 2022; 22:1170. [DOI: 10.1186/s12885-022-10242-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 10/27/2022] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
MicroRNAs (miRNAs) play pivotal roles in the development and progression of breast cancer (BC). In this study, we attempted to identify miRNAs associated with BC prognosis and progression via integrated analysis.
Methods
We first screened 83 differentially expressed miRNAs (DEMs) in 1249 BC samples and 151 normal samples. We then validated their roles in expression and prognosis of BC, identified two survival-related DEMs, and established a risk model. The prediction efficiency was assessed in both the training and validation groups. Tissue and cell experiments were conducted to verify the regulatory effects of miR-127 in BC.
Results
The ROC curve indicated good prediction ability with 1-, 3-, and 5-year survival rates of 0.73, 0.72, and 0.72, respectively. Moreover, hsa-miR-127 was found to be an independent prognostic factor of BC. Functional analyses revealed that it is involved in various cancer pathways such as the PI3K-Akt and p53 pathways. miR-127 expression was down-regulated in both BC tissues and cell lines. The knockdown of miR-127 substantially increased, whereas overexpression decreased BC cell proliferation, invasion, and migration. This effect of miR-127 was consistent with its tumorigenic ability and tumor volume in nude mice.
Conclusions
These findings indicate that low expression of miR-127 contributes to BC migration, invasion, and tumorigenesis and that it can be a therapeutic target and prognostic biomarker for BC.
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3
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Medina L, Guerrero-Muñoz J, Castillo C, Liempi A, Fernández-Moya A, Araneda S, Ortega Y, Rivas C, Maya JD, Kemmerling U. Differential microRNAs expression during ex vivo infection of canine and ovine placental explants with Trypanosoma cruzi and Toxoplasma gondii. Acta Trop 2022; 235:106651. [PMID: 35964709 DOI: 10.1016/j.actatropica.2022.106651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 11/25/2022]
Abstract
Trypanosoma cruzi and Toxoplasma gondii are two zoonotic parasites that constitute significant human and animal health threats, causing a significant economic burden worldwide. Both parasites can be transmitted congenitally, but transmission rates for T. gondii are high, contrary to what has been observed for T. cruzi. The probability of congenital transmission depends on complex interactions between the pathogen and the host, including the modulation of host cell gene expression by miRNAs. During ex vivo infection of canine and ovine placental explants, we evaluated the expression of 3 miRNAs (miR-30e-3p, miR-3074-5p, and miR-127-3p) previously associated with parasitic and placental diseases and modulated by both parasites. In addition, we identified the possible target genes of the miRNAs by using computational prediction tools and performed GO and KEGG enrichment analyses to identify the biological functions and associated pathologies. The three miRNAs are differentially expressed in the canine and ovine placenta in response to T. cruzi and T. gondii. We conclude that the observed differential expression and associated functions might explain, at least partially, the differences in transmission rates and susceptibility to parasite infection in different species.
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Affiliation(s)
- Lisvaneth Medina
- Programa de Biología Integrativa, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Jesús Guerrero-Muñoz
- Programa de Biología Integrativa, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Christian Castillo
- Programa de Biología Integrativa, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile; Núcleo de Investigación Aplicada en Ciencias Veterinarias y Agronómicas, Facultad de Medicina Veterinaria y Agronomía, Universidad de Las Américas, Chile
| | - Ana Liempi
- Programa de Biología Integrativa, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Alejandro Fernández-Moya
- Programa de Biología Integrativa, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Sebastian Araneda
- Programa de Biología Integrativa, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile; Departamento de Patología y Medicina Oral, Facultad de Odontología, Universidad de Chile, Santiago, Chile
| | - Yessica Ortega
- Programa de Biología Integrativa, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile; Facultad de Farmacia y Bioanálisis, Universidad de Los Andes, Mérida, Venezuela
| | - Cristian Rivas
- Programa de Biología Integrativa, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Juan Diego Maya
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Ulrike Kemmerling
- Programa de Biología Integrativa, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile.
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4
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Garcia J, Smith SS, Karki S, Drissi H, Hrdlicka HH, Youngstrom DW, Delany AM. miR-433-3p suppresses bone formation and mRNAs critical for osteoblast function in mice. J Bone Miner Res 2021; 36:1808-1822. [PMID: 34004029 DOI: 10.1002/jbmr.4339] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 05/03/2021] [Accepted: 05/10/2021] [Indexed: 12/16/2022]
Abstract
MicroRNAs (miRNAs) are key posttranscriptional regulators of osteoblastic commitment and differentiation. miR-433-3p was previously shown to target Runt-related transcription factor 2 (Runx2) and to be repressed by bone morphogenetic protein (BMP) signaling. Here, we show that miR-433-3p is progressively decreased during osteoblastic differentiation of primary mouse bone marrow stromal cells in vitro, and we confirm its negative regulation of this process. Although repressors of osteoblastic differentiation often promote adipogenesis, inhibition of miR-433-3p did not affect adipocyte differentiation in vitro. Multiple pathways regulate osteogenesis. Using luciferase-3' untranslated region (UTR) reporter assays, five novel miR-433-3p targets involved in parathyroid hormone (PTH), mitogen-activated protein kinase (MAPK), Wnt, and glucocorticoid signaling pathways were validated. We show that Creb1 is a miR-433-3p target, and this transcription factor mediates key signaling downstream of PTH receptor activation. We also show that miR-433-3p targets hydroxysteroid 11-β dehydrogenase 1 (Hsd11b1), the enzyme that locally converts inactive glucocorticoids to their active form. miR-433-3p dampens glucocorticoid signaling, and targeting of Hsd11b1 could contribute to this phenomenon. Moreover, miR-433-3p targets R-spondin 3 (Rspo3), a leucine-rich repeat-containing G-protein coupled receptor (LGR) ligand that enhances Wnt signaling. Notably, Wnt canonical signaling is also blunted by miR-433-3p activity. In vivo, expression of a miR-433-3p inhibitor or tough decoy in the osteoblastic lineage increased trabecular bone volume. Mice expressing the miR-433-3p tough decoy displayed increased bone formation without alterations in osteoblast or osteoclast numbers or surface, indicating that miR-433-3p decreases osteoblast activity. Overall, we showed that miR-433-3p is a negative regulator of bone formation in vivo, targeting key bone-anabolic pathways including those involved in PTH signaling, Wnt, and endogenous glucocorticoids. Local delivery of miR-433-3p inhibitor could present a strategy for the management of bone loss disorders and bone defect repair. © 2021 American Society for Bone and Mineral Research (ASBMR).
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Affiliation(s)
- John Garcia
- Center for Molecular Oncology, UConn Health, Farmington, Connecticut, USA
| | - Spenser S Smith
- Center for Molecular Oncology, UConn Health, Farmington, Connecticut, USA
| | - Sangita Karki
- Center for Molecular Oncology, UConn Health, Farmington, Connecticut, USA
| | - Hicham Drissi
- Department of Orthopaedics, Emory University and Atlanta VA Medical Center, Decatur, Georgia, USA
| | - Henry H Hrdlicka
- Center for Molecular Oncology, UConn Health, Farmington, Connecticut, USA
| | - Daniel W Youngstrom
- Department of Orthopedic Surgery, UConn Health, Farmington, Connecticut, USA
| | - Anne M Delany
- Center for Molecular Oncology, UConn Health, Farmington, Connecticut, USA
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Li J, Wang G, Jiang J, Zhang L, Zhou P, Ren H. MicroRNA-127-3p regulates myoblast proliferation by targeting Sept7. Biotechnol Lett 2020; 42:1633-1644. [PMID: 32382971 DOI: 10.1007/s10529-020-02906-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 04/30/2020] [Accepted: 05/04/2020] [Indexed: 12/19/2022]
Abstract
OBJECTIVE MicroRNAs (miRNAs) are highly conserved, endogenous small RNAs that regulate gene expression at the post-transcriptional level. miR-127 plays an essential role in myogenic differentiation in vivo and in vitro. However, it is not clear whether miR-127-3p affects myogenic cell proliferation. METHODS The detailed function of miR-127-3p in proliferative C2C12 cell lines and further identified its regulatory mechanism by qRT-PCR, western blot, flow cytometry analysis and luciferase reporter assay. RESULTS Overexpression of miR-127-3p significantly inhibited proliferation of C2C12 cells and vice versa. Sept7 was a target gene of miR-127-3p using dual-luciferase reporter assay, qRT-PCR, and western blotting. The RNA interference analysis, in which Sept7 was downregulated, showed that Sept7 significantly promoted the proliferation of C2C12 cells. Besides, the expression level of Sept7 was detected analysis in muscle cells and tissues. CONCLUSIONS These findings reveal that miR-127-3p regulates myoblast proliferation by targeting Sept7.
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Affiliation(s)
- Jie Li
- Herbivorous Livestock Institute, Chongqing Academy of Animal Sciences, Chongqing, 402460, China
| | - Gaofu Wang
- Herbivorous Livestock Institute, Chongqing Academy of Animal Sciences, Chongqing, 402460, China
| | - Jing Jiang
- Herbivorous Livestock Institute, Chongqing Academy of Animal Sciences, Chongqing, 402460, China
| | - Li Zhang
- Herbivorous Livestock Institute, Chongqing Academy of Animal Sciences, Chongqing, 402460, China
| | - Peng Zhou
- Herbivorous Livestock Institute, Chongqing Academy of Animal Sciences, Chongqing, 402460, China
| | - Hangxing Ren
- Herbivorous Livestock Institute, Chongqing Academy of Animal Sciences, Chongqing, 402460, China.
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6
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Mainieri A, Haig D. Retrotransposon gag-like 1 (RTL1) and the molecular evolution of self-targeting imprinted microRNAs. Biol Direct 2019; 14:18. [PMID: 31640745 PMCID: PMC6805670 DOI: 10.1186/s13062-019-0250-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 09/26/2019] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Transcription of the antisense strand of RTL1 produces a sense mRNA that is targeted for degradation by antisense microRNAs transcribed from the sense strand. Translation of the mRNA produces a retrotransposon-derived protein that is implicated in placental development. The sense and antisense transcripts are oppositely imprinted: sense mRNAs are expressed from the paternally-derived chromosome, antisense microRNAs from the maternally-derived chromosome. RESULTS Two microRNAs at the RTL1 locus, miR-431 and the rodent-specific miR-434, are derived from within tandem repeats. We present an evolutionary model for the establishment of a new self-targeting microRNA derived from within a tandem repeat that inhibits production of RTL1 protein when maternally-derived in heterozygotes but not when paternally-derived. CONCLUSIONS The interaction of sense and antisense transcripts can be interpreted as a form of communication between maternally-derived and paternally-derived RTL1 alleles that possesses many of the features of a greenbeard effect. This interaction is evolutionary stable, unlike a typical greenbeard effect, because of the necessary complementarity between microRNAs and mRNA transcribed from opposite strands of the same double helix. We conjecture that microRNAs and mRNA cooperate to reduce demands on mothers when an allele is paired with itself in homozygous offspring. REVIEWERS This article was reviewed by Eugene Berezikov and Bernard Crespi.
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Affiliation(s)
- Avantika Mainieri
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, USA
| | - David Haig
- Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA, USA.
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7
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Piscopo P, Grasso M, Puopolo M, D'Acunto E, Talarico G, Crestini A, Gasparini M, Campopiano R, Gambardella S, Castellano AE, Bruno G, Denti MA, Confaloni A. Circulating miR-127-3p as a Potential Biomarker for Differential Diagnosis in Frontotemporal Dementia. J Alzheimers Dis 2019; 65:455-464. [PMID: 30056425 DOI: 10.3233/jad-180364] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Given the heterogeneous nature of frontotemporal dementia (FTD), sensitive biomarkers are greatly needed for the accurate diagnosis of this neurodegenerative disorder. Circulating miRNAs have been reported as promising biomarkers for neurodegenerative disorders and processes affecting the central nervous system, especially in aging. The objective of the study was to evaluate if some circulating miRNAs linked with apoptosis (miR-29b-3p, miR-34a-5p, miR-16-5p, miR-17-5p, miR-107, miR-19b-3p, let-7b-5p, miR-26b-5p, and 127-3p) were able to distinguish between FTD patients and healthy controls. For this study, we enrolled 127 subjects, including 54 patients with FTD, 20 patients with Alzheimer's disease (AD), and 53 healthy controls. The qRT-PCR analysis showed a downregulation of miR-127-3p in FTD compared to controls, while the levels of other miRNAs remained unchanged. Then, miR-127-3p expression was also analyzed in AD patients, finding a different expression between two patient groups. A receiver operating characteristic curve was then created for miR-127-3p to discriminate FTD versus AD (AUC: 0.8986), and versus healthy controls (AUC: 0.8057). In conclusion, miR-127-3p could help to diagnose FTD and to distinguish it from AD.
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Affiliation(s)
- Paola Piscopo
- Department of Neuroscience, Istituto Superiore di Sanità, Rome, Italy
| | | | - Maria Puopolo
- Department of Neuroscience, Istituto Superiore di Sanità, Rome, Italy
| | - Emanuela D'Acunto
- Department of Neuroscience, Istituto Superiore di Sanità, Rome, Italy.,Department of Biology and Biotechnologies 'Charles Darwin', University of Rome "Sapienza", Rome, Italy
| | - Giuseppina Talarico
- Department of Human Neuroscience, University of Rome "Sapienza", Rome, Italy
| | - Alessio Crestini
- Department of Neuroscience, Istituto Superiore di Sanità, Rome, Italy
| | - Marina Gasparini
- Department of Human Neuroscience, University of Rome "Sapienza", Rome, Italy
| | - Rosa Campopiano
- Department of Neurology, IRCCS Neuromed Institute, Pozzilli, IS, Italy
| | | | | | - Giuseppe Bruno
- Department of Human Neuroscience, University of Rome "Sapienza", Rome, Italy
| | - Michela A Denti
- Centre for Integrative Biology, University of Trento, Trento, Italy
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8
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Kang EM, Yin AA, He YL, Chen WJ, Etcheverry A, Aubry M, Barnholtz-Sloan J, Mosser J, Zhang W, Zhang X. A five-CpG signature of microRNA methylation in non-G-CIMP glioblastoma. CNS Neurosci Ther 2019; 25:937-950. [PMID: 31016891 PMCID: PMC6698977 DOI: 10.1111/cns.13133] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 03/17/2019] [Accepted: 03/18/2019] [Indexed: 12/22/2022] Open
Abstract
AIMS DNA methylation has been found to regulate microRNAs (miRNAs) expression, but the prognostic value of miRNA-related DNA methylation aberration remained largely elusive in cancers including glioblastomas (GBMs). This study aimed to investigate the clinical and biological feature of miRNA methylation in GBMs of non-glioma-CpG island methylator phenotype (non-G-CIMP). METHODS Prognostic miRNA methylation loci were analyzed, with TCGA and Rennes cohort as training sets, and independent datasets of GBMs and low-grade gliomas (LGGs) were obtained as validation sets. Different statistical and bioinformatic analysis and experimental validations were performed to clinically and biologically characterize the signature. RESULTS We identified and validated a risk score based on methylation status of five miRNA-associated CpGs which could predict survival of GBM patients in a series of training and validation sets. This signature was independent of age and O-6-methylguanine-DNA methyltransferase (MGMT) promoter methylation status. The risk subgroup was associated with angiogenesis and accordingly differential responses to bevacizumab-contained therapy. MiRNA target analysis and in vitro experiments further confirmed the accuracy of this signature. CONCLUSION The five-CpG signature of miRNA methylation was biologically relevant and was of potential prognostic and predictive value for GBMs. It might be of help for improving individualized treatment.
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Affiliation(s)
- En-Ming Kang
- Department of Neurosurgery, Xijing Institute of Clinical Neuroscience, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - An-An Yin
- Department of Neurosurgery, Xijing Institute of Clinical Neuroscience, Xijing Hospital, Air Force Medical University, Xi'an, China.,Department of Neurosurgery, The 88th Hospital of the People's Liberation Army, Taian, China
| | - Ya-Long He
- Department of Neurosurgery, Xijing Institute of Clinical Neuroscience, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Wei-Jun Chen
- Department of Emergency Medicine, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Amandine Etcheverry
- CNRS, UMR 6290, Institut de Génétique et Développement de Rennes (IGdR), Rennes, France.,UEB, UMS 3480 Biosit, Faculté de Médecine, Université Rennes1, Rennes, France.,CHU Rennes, Service de Génétique Moléculaire et Génomique, Rennes, France
| | - Marc Aubry
- UEB, UMS 3480 Biosit, Faculté de Médecine, Université Rennes1, Rennes, France.,Plate-forme Génomique Santé Biosit, Université Rennes1, Rennes, France
| | - Jill Barnholtz-Sloan
- Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio
| | - Jean Mosser
- CNRS, UMR 6290, Institut de Génétique et Développement de Rennes (IGdR), Rennes, France.,UEB, UMS 3480 Biosit, Faculté de Médecine, Université Rennes1, Rennes, France.,CHU Rennes, Service de Génétique Moléculaire et Génomique, Rennes, France.,Plate-forme Génomique Santé Biosit, Université Rennes1, Rennes, France
| | - Wei Zhang
- Department of Neurosurgery, Xijing Institute of Clinical Neuroscience, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Xiang Zhang
- Department of Neurosurgery, Xijing Institute of Clinical Neuroscience, Xijing Hospital, Air Force Medical University, Xi'an, China
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9
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Tran M, Liu Y, Huang W, Wang L. Nuclear receptors and liver disease: Summary of the 2017 basic research symposium. Hepatol Commun 2018; 2:765-777. [PMID: 30129636 PMCID: PMC6049066 DOI: 10.1002/hep4.1203] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 05/03/2018] [Accepted: 05/10/2018] [Indexed: 12/11/2022] Open
Abstract
The nuclear receptor superfamily contains important transcriptional regulators that play pleiotropic roles in cell differentiation, development, proliferation, and metabolic processes to govern liver physiology and pathology. Many nuclear receptors are ligand-activated transcription factors that regulate the expression of their target genes by modulating transcriptional activities and epigenetic changes. Additionally, the protein complex associated with nuclear receptors consists of a multitude of coregulators, corepressors, and noncoding RNAs. Therefore, acquiring new information on nuclear receptors may provide invaluable insight into novel therapies and shed light on new interventions to reduce the burden and incidence of liver diseases. (Hepatology Communications 2018;2:765-777).
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Affiliation(s)
- Melanie Tran
- Department of Physiology and Neurobiology and Institute for Systems Genomics, University of Connecticut, Storrs, CT
| | - Yanjun Liu
- Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, Beckman Research Institute City of Hope National Medical Center Duarte CA
| | - Wendong Huang
- Department of Diabetes Complications and Metabolism, Diabetes and Metabolism Research Institute, Beckman Research Institute City of Hope National Medical Center Duarte CA
| | - Li Wang
- Department of Physiology and Neurobiology and Institute for Systems Genomics, University of Connecticut, Storrs, CT.,Veterans Affairs Connecticut Healthcare System West Haven CT.,Department of Internal Medicine, Section of Digestive Diseases Yale University New Haven CT
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10
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Zhang Y, Zhao Y, Wu J, Liangpunsakul S, Niu J, Wang L. MicroRNA-26-5p functions as a new inhibitor of hepatoblastoma by repressing lin-28 homolog B and aurora kinase a expression. Hepatol Commun 2018; 2:861-871. [PMID: 30027143 PMCID: PMC6049067 DOI: 10.1002/hep4.1185] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/10/2018] [Accepted: 03/15/2018] [Indexed: 12/16/2022] Open
Abstract
Hepatoblastoma (HB) is the most common liver tumor in children. Despite recent improvements in treatment strategies, the survival of children with hepatoblastoma remains poor. In this study, we identified a novel role of microRNA‐26a‐5p (miR‐26a‐5p), lin‐28 homolog B (LIN28B), Ras‐related nuclear protein (RAN), and aurora kinase A (AURKA) in HB. The expression of LIN28B, RAN, and AURKA was significantly up‐regulated in human HB livers and cell lines. Knockdown of LIN28B and RAN by small interfering RNAs inhibited HB tumor cell proliferation and foci formation. We also elucidated miR‐26a‐5p‐mediated translational inhibition of LIN28B and AURKA in HB. Overexpression of miR‐26a‐5p markedly decreased LIN28B and AURKA 3′‐untranslated region activities and protein expression and repressed HB cell proliferation and colony formation. In contrast, re‐expression of LIN28B and AURKA rescued miR‐26a‐5p‐mediated suppression of HB cell growth and clonality. Importantly, a decreased miR‐26a‐5p expression correlated with the poor outcome of patients with HB. Conclusion: miR‐26a‐5p is a newly identified repressor of HB growth through its inhibition of the oncogenic LIN28B–RAN–AURKA pathway. (Hepatology Communications 2018;2:481‐491)
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Affiliation(s)
- Yutong Zhang
- Department of Physiology and Neurobiology and Institute for Systems Genomics University of Connecticut Storrs CT.,Department of Pediatric Oncology The First Hospital of Jilin University Changchun China
| | - Yulan Zhao
- Department of Physiology and Neurobiology and Institute for Systems Genomics University of Connecticut Storrs CT
| | - Jianguo Wu
- Department of Physiology and Neurobiology and Institute for Systems Genomics University of Connecticut Storrs CT
| | - Suthat Liangpunsakul
- Division of Gastroenterology and Hepatology, Department of Medicine Indiana University School of Medicine Indianapolis IN.,Department of Biochemistry and Molecular Biology Indiana University School of Medicine Indianapolis IN.,Roudebush Veterans Administration Medical Center Indianapolis IN
| | - Junqi Niu
- Department of Hepatology The First Hospital of Jilin University Changchun China
| | - Li Wang
- Department of Physiology and Neurobiology and Institute for Systems Genomics University of Connecticut Storrs CT.,Department of Internal Medicine Section of Digestive Diseases, Yale University New Haven CT.,Veterans Affairs Connecticut Healthcare System West Haven CT
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11
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Han DX, Sun XL, Xu MQ, Chen CZ, Jiang H, Gao Y, Yuan B, Zhang JB. Roles of differential expression of microRNA-21-3p and microRNA-433 in FSH regulation in rat anterior pituitary cells. Oncotarget 2018; 8:36553-36565. [PMID: 28402262 PMCID: PMC5482676 DOI: 10.18632/oncotarget.16615] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 03/11/2017] [Indexed: 11/29/2022] Open
Abstract
Follicle-stimulating hormone (FSH) secreted by adenohypophyseal cells plays an important role in the regulation of reproduction, but whether microRNAs (miRNAs) regulate the secretion of FSH remains unclear. In the present study, we predicted and screened miRNAs that might act on the follicle-stimulating hormone beta-subunit (FSHb) gene of rats using the TargetScan program and luciferase reporter assays, and the results identified two miRNAs, miR-21-3p and miR-433. We then transfected these miRNAs into rat anterior adenohypophyseal cells and assessed the FSHb expression levels in and FSH secretion by the transfected cells through quantitative PCR and ELISA. The results showed that both miR-21-3p and miR-433 down-regulated the expression levels of FSHb and resulted in the decrease of the secretion of FSH compared with the control group, and treatment with miR-21-3p and miR-433 inhibitors up-regulated the expression levels of FSHb and resulted in the increase of the secretion of FSH. Taken together, our results indicate that miR-21-3p and miR-433 can down-regulate the expression of FSHb by directly targeting the FSHb 3′UTR in rat primary pituitary cells. Our findings provide evidence that miRNAs can regulate FSHb expression and further affect the secretion of FSH and might contribute to the use of miRNAs for the regulation of animal reproduction.
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Affiliation(s)
- Dong-Xu Han
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, P.R. China
| | - Xu-Lei Sun
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, P.R. China
| | - Ming-Qiang Xu
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, P.R. China
| | - Cheng-Zhen Chen
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, P.R. China
| | - Hao Jiang
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, P.R. China
| | - Yan Gao
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, P.R. China
| | - Bao Yuan
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, P.R. China
| | - Jia-Bao Zhang
- Department of Laboratory Animals, College of Animal Sciences, Jilin University, Changchun, Jilin, P.R. China
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12
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Sun J, Chen J, Cao J, Li T, Zhuang S, Jiang X. IL-1β-stimulated β-catenin up-regulation promotes angiogenesis in human lung-derived mesenchymal stromal cells through a NF-κB-dependent microRNA-433 induction. Oncotarget 2018; 7:59429-59440. [PMID: 27449086 PMCID: PMC5312322 DOI: 10.18632/oncotarget.10683] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2016] [Accepted: 07/04/2016] [Indexed: 01/07/2023] Open
Abstract
Considerable attentions have been focused on the treatment of lung injury using mesenchymal stem cells that can replenish damaged tissues including the blood vessels. In human lung-derived mesenchymal stem cells (hL-MSC), we investigated the potential role of an IL-1β-stimulated miR-433 pathway in angiogenesis in vitro. The expressions of miR-433 and its target genes were examined in cells treated with IL-1β. The angiogenic activity of hL-MSC was studied by cell migration and tube formation assays in which miR-433 levels were manipulated. The reporter assay and chromatin immunoprecipitation (ChIP) were also performed to analyze the underlying regulations. We found that the expression of miR-433 was enhanced in hL-MSC by IL-1β in a NF-κB dependent manner via a NF-κB binding site at its promoter region. The effects of IL-1β on promoting angiogenic activities in hL-MSC can be mimicked by the overexpression of miR-433 and were blocked by anti-miR-433. Mechanistically, our data suggested that miR-433 directly targets the 3'-UTR of Dickkopf Wnt signaling pathway inhibitor 1 (DKK1) mRNA and decreases its expression. Consistently, the expression of β-catenin, the major mediator of canonical Wnt pathway that is capable of inducing endothelial differentiation and angiogenesis, was upregulated by IL-1β through miR-433. Thus, increasing miR-433 expression by IL-1β in mesenchymal stem cells could stimulate their capacity of vascular remodeling for efficient repair processes, which may be utilized as a therapeutic target in patients suffering from severe lung injury.
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Affiliation(s)
- Jia Sun
- Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi 214023, Jiangsu, China
| | - Jintao Chen
- Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi 214023, Jiangsu, China
| | - Juan Cao
- Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi 214023, Jiangsu, China
| | - Tianxiang Li
- Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi 214023, Jiangsu, China
| | - Shaoxia Zhuang
- Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi 214023, Jiangsu, China
| | - Xiufeng Jiang
- Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi 214023, Jiangsu, China
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13
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Song Y, Lu S, Zhao J, Wang L. Nuclear Receptor SHP: A Critical Regulator of miRNA and lncRNA Expression and Function. NUCLEAR RECEPTOR RESEARCH 2017; 4:101312. [PMID: 30148159 PMCID: PMC6103530 DOI: 10.11131/2017/101312] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Small heterodimer partner (SHP, NR0B2) is identified as a unique orphan nuclear receptor that acts as a transcriptional repressor. SHP plays a crucial role in the control of various physiological processes and in several diseases by regulating the expression of disease-specific genes. Non-coding RNAs (ncRNAs), including long noncoding RNAs (lncRNAs) and microRNAs (miRNAs), are encoded of RNAs that are transcribed but not translated into proteins, which are involved in diverse developmental and cellular processes in eukaryotic organisms. Research during the past decade has identified factors participating in the regulation of ncRNAs biogenesis and function. In this review, we summarize recent findings demonstrating a critical role of SHP as a transcriptional regulator of ncRNAs expression and function.
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Affiliation(s)
- Yongfeng Song
- Department of Endocrinology and Metabolism, Shandong Provincial Hospital affiliated to Shandong University, Jinan, Shandong, 250021, China
- Department of Physiology and Neurobiology, and the Institute for Systems Genomics, University of Connecticut, Storrs, CT 06269, USA
| | - Shan Lu
- Genesis Biotechnology, Trenton, NJ 08619, USA
| | - Jiajun Zhao
- Department of Endocrinology and Metabolism, Shandong Provincial Hospital affiliated to Shandong University, Jinan, Shandong, 250021, China
| | - Li Wang
- Department of Endocrinology and Metabolism, Shandong Provincial Hospital affiliated to Shandong University, Jinan, Shandong, 250021, China
- Department of Physiology and Neurobiology, and the Institute for Systems Genomics, University of Connecticut, Storrs, CT 06269, USA
- Veterans Affairs Connecticut Healthcare System, West Haven, CT 06516, USA
- Department of Internal Medicine, Section of Digestive Diseases, Yale University, New Haven, CT 06520, USA
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
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14
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Tran M, Lee SM, Shin DJ, Wang L. Loss of miR-141/200c ameliorates hepatic steatosis and inflammation by reprogramming multiple signaling pathways in NASH. JCI Insight 2017; 2:96094. [PMID: 29093267 DOI: 10.1172/jci.insight.96094] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 09/26/2017] [Indexed: 12/12/2022] Open
Abstract
Accumulation of lipid droplets and inflammatory cell infiltration is the hallmark of nonalcoholic steatohepatitis (NASH). The roles of noncoding RNAs in NASH are less known. We aim to elucidate the function of miR-141/200c in diet-induced NASH. WT and miR-141/200c-/- mice were fed a methionine and choline deficient (MCD) diet for 2 weeks to assess markers of steatosis, liver injury, and inflammation. Hepatic miR-141 and miR-200c RNA levels were highly induced in human patients with NASH fatty liver and in WT MCD mice. miR-141/200c-/- MCD mice had reduced liver weights and triglyceride (TG) levels, which was associated with increased microsomal TG transfer protein (MTTP) and PPARα but reduced SREBP1c and FAS expression. Inflammation was attenuated and F4/80 macrophage activation was suppressed in miR-141/200c-/- mice, as evidenced by decreased serum aminotransferases and IL-6 and reduced hepatic proinflammatory, neutrophil, and profibrotic genes. Treatment with LPS in BM-derived macrophages isolated from miR-200c/141-/- mice polarized macrophages toward the M2 antiinflammatory state by increasing Arg1 and IL-10 levels while decreasing the M1 marker iNOS. In addition, elevated phosphorylated AMPK (p-AMPK), p-AKT, and p-GSK3β and diminished TLR4 and p-mTOR/p-4EBP1 proteins were observed. Lipidomics and metabolomics revealed alterations of TG and phosphatidylcholine (PC) lipid species by miR-141/200c deficiency. In summary, miR-141/200c deficiency diminished NASH-associated hepatic steatosis and inflammation by reprogramming lipid and inflammation signaling pathways.
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Affiliation(s)
- Melanie Tran
- Department of Physiology and Neurobiology, and the Institute for Systems Genomics, University of Connecticut, Storrs, Connecticut, USA
| | - Sang-Min Lee
- Department of Physiology and Neurobiology, and the Institute for Systems Genomics, University of Connecticut, Storrs, Connecticut, USA
| | - Dong-Ju Shin
- Department of Physiology and Neurobiology, and the Institute for Systems Genomics, University of Connecticut, Storrs, Connecticut, USA
| | - Li Wang
- Department of Physiology and Neurobiology, and the Institute for Systems Genomics, University of Connecticut, Storrs, Connecticut, USA.,Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut, USA.,Department of Internal Medicine, Section of Digestive Diseases, Yale University, New Haven, Connecticut, USA.,School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang, China
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15
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Wang YJ, Zhang ZF, Fan SH, Zhuang J, Shan Q, Han XR, Wen X, Li MQ, Hu B, Sun CH, Qiao B, Tao Q, Wu DM, Lu J, Zheng YL. MicroRNA-433 inhibits oral squamous cell carcinoma cells by targeting FAK. Oncotarget 2017; 8:100227-100241. [PMID: 29245973 PMCID: PMC5725015 DOI: 10.18632/oncotarget.22151] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 10/05/2017] [Indexed: 01/03/2023] Open
Abstract
We investigated the involvement of microRNA-433 (miR-433) in the proliferation, migration, and invasiveness of oral squamous cell carcinoma (OSCC). Totally 108 OSCC tissues and adjacent normal tissues from patients with OSCC were collected. Also, transplanted tumor formation experiment in nude mice was conducted to verify the effect of miR-433 and FAK on subcutaneous transplanted tumor. The CD44+ stem cell from SCC-9 were collected and assigned into the blank, miR-433 mimics, mimics control, miR-433 inhibitors, inhibitors control, siFAK and miR-433 inhibitors + siFAK groups. The qRT-PCR and western blotting were used to detect miR-433, FAK, ERK, MEK, pERK and pMEK after transfection. Flow cytometry, MTT assay, scratch test and Transwell assay were performed to determine the cell proportion, growth, migration and invasion of SCC-9 cells. In cell line SCC-9, expression of CD133, Oct-4, and BIM-1 was greater in CD44+ cells than CD44- cells, indicating that CD44+ cells had characteristics of tumor stem cells. Expression of FAK, ERK, MEK, p-ERK and p-MEK was decreased in tumor tissues from the CD44-, miR-433, and siFAK groups. Expression of MiR-433 mRNA was elevated, while levels of FAK, ERK, MEK, p-ERK, and p-MEK mRNA were all decreased in the miR-433 mimics group. In the miR-433 mimics and siFAK groups, cell proliferation, migration, and invasion were all decreased, while the opposite trends were seen in the miR-433 inhibitor group. These results indicate that miR-433 downregulates FAK through the ERK/MAPK signaling pathway to inhibit the proliferation, migration, and invasiveness of SCC-9 OSCC cells.
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Affiliation(s)
- Yong-Jian Wang
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Zi-Feng Zhang
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Shao-Hua Fan
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Juan Zhuang
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, P.R. China.,School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221008, P.R. China.,Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, School of Life Sciences, Huaiyin Normal University, Huaian 223300, P.R. China
| | - Qun Shan
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Xin-Rui Han
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Xin Wen
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Meng-Qiu Li
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Bin Hu
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Chun-Hui Sun
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Bin Qiao
- Department of Oral and Maxillofacial Surgery, Guanghua School and Hospital of Stomatology, Guangdong Provincial Key Laboratory of Oral Diseases, Sun Yat-Sen University, Guangzhou 510055, P.R. China
| | - Qian Tao
- Department of Oral and Maxillofacial Surgery, Guanghua School and Hospital of Stomatology, Guangdong Provincial Key Laboratory of Oral Diseases, Sun Yat-Sen University, Guangzhou 510055, P.R. China
| | - Dong-Mei Wu
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Jun Lu
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, P.R. China
| | - Yuan-Lin Zheng
- Key Laboratory for Biotechnology on Medicinal Plants of Jiangsu Province, School of Life Science, Jiangsu Normal University, Xuzhou 221116, P.R. China
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16
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Zhao Y, Yang Z, Wu J, Wu R, Keshipeddy SK, Wright D, Wang L. High-mobility-group protein 2 regulated by microRNA-127 and small heterodimer partner modulates pluripotency of mouse embryonic stem cells and liver tumor initiating cells. Hepatol Commun 2017; 1:816-830. [PMID: 29218329 PMCID: PMC5678910 DOI: 10.1002/hep4.1086] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
High‐mobility‐group protein 2 (HMGB2) expression is up‐regulated in human liver cancer; however, little is known about its regulatory function. Here, we establish HMGB2 as a new modulator of the pluripotency of mouse embryonic stem cells. Similar to octamer‐binding transcription factor 4 (OCT4) and sex‐determining region Y‐box 2 (SOX2), HMGB2 protein is highly expressed in undifferentiated CGR8 cells, whereas it undergoes rapid decline during embryonic body formation. HMGB2 interacts with OCT4, increases protein expression of OCT4 and SOX2, and enhances their transcriptional activities. We also show that microRNA (miRNA)‐127 is a translational repressor of HMGB2 protein expression by targeting its 3′ untranslated region. We further elucidate a transcriptional mechanism controlling HMGB2 messenger RNA expression by the nuclear receptor small heterodimer partner (SHP) and transcription factor E2F1. Diminishing HMGB2 expression by ectopic expression of miR‐127 or SHP or treatment with the small molecule inhibitor inflachromene decreases OCT4 and SOX2 expression and facilitates CGR8 differentiation. In addition, HMGB2 is markedly induced in liver tumor initiating cells. Diminishing HMGB2 expression by short hairpin RNA for HMGB2 (shHMGB2), miR‐127, or SHP impairs spheroid formation. Importantly, HMGB2 expression is elevated in various human cancers. Conclusion: HMGB2 acts upstream of OCT4/SOX2 signaling to control embryonic stem cell pluripotency. Diminishing HMGB2 expression by miR‐127 or SHP may provide a potential means to decrease the pluripotency of tumor initiating cells. (Hepatology Communications 2017;1:816–830)
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Affiliation(s)
- Yulan Zhao
- Department of Physiology and Neurobiology, and The Institute for Systems Genomics, University of Connecticut, Storrs, CT 06269
| | - Zhihong Yang
- Department of Physiology and Neurobiology, and The Institute for Systems Genomics, University of Connecticut, Storrs, CT 06269.,Veterans Affairs Connecticut Healthcare System, West Haven, CT 06516
| | - Jianguo Wu
- Department of Physiology and Neurobiology, and The Institute for Systems Genomics, University of Connecticut, Storrs, CT 06269
| | - Raymond Wu
- Departments of Pathology, Keck School of Medicine of the University of Southern California, Los Angeles, CA, 90033; and Department of Veterans Affairs Greater Los Angeles Healthcare System, Los Angeles CA 90073
| | - Santosh K Keshipeddy
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, CT 06269
| | - Dennis Wright
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Connecticut, Storrs, CT 06269
| | - Li Wang
- Department of Physiology and Neurobiology, and The Institute for Systems Genomics, University of Connecticut, Storrs, CT 06269.,Veterans Affairs Connecticut Healthcare System, West Haven, CT 06516.,Department of Internal Medicine, Section of Digestive Diseases, Yale University, New Haven, CT 06520.,School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
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17
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Hazra B, Kumawat KL, Basu A. The host microRNA miR-301a blocks the IRF1-mediated neuronal innate immune response to Japanese encephalitis virus infection. Sci Signal 2017; 10:eaaf5185. [PMID: 28196914 DOI: 10.1126/scisignal.aaf5185] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023]
Abstract
Effective recognition of viral components and the subsequent stimulation of the production of type I interferons (IFNs) is crucial for the induction of host antiviral immunity. The failure of the host to efficiently produce type I IFNs in response to infection by the Japanese encephalitis virus (JEV) is linked with an increased probability for the disease to become lethal. JEV is a neurotropic virus of the Flaviviridae family that causes encephalitis in humans. JEV infection is regulated by several host factors, including microRNAs, which are conserved noncoding RNAs that participate in various physiological and pathological processes. We showed that the JEV-induced expression of miR-301a led to inhibition of the production of type I IFN by reducing the abundances of the transcription factor IFN regulatory factor 1 (IRF1) and the signaling protein suppressor of cytokine signaling 5 (SOCS5). Mechanistically, induction of miR-301a expression during JEV infection required the transcription factor nuclear factor κB. In mouse neurons, neutralization of miR-301a restored the host innate immune response by enabling IFN-β production, thereby restricting viral propagation. Inhibition of miR-301a in mouse brain rescued the production of IRF1 and SOCS5, increased the generation of IFN-β, and reduced the extent of JEV replication, thus improving mouse survival. Thus, our study suggests that the JEV-induced expression of miR-301a assists viral pathogenesis by suppressing IFN production, which might be targeted by antiviral therapies.
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Affiliation(s)
- Bibhabasu Hazra
- National Brain Research Centre, Manesar, Haryana 122051, India
| | | | - Anirban Basu
- National Brain Research Centre, Manesar, Haryana 122051, India.
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18
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Zhang L, Zhang Y, Zhang X, Zhang Y, Jiang Y, Xiao X, Tan J, Yuan W, Liu Y. MicroRNA-433 Inhibits the Proliferation and Migration of HUVECs and Neurons by Targeting Hypoxia-Inducible Factor 1 Alpha. J Mol Neurosci 2016; 61:135-143. [PMID: 27815672 DOI: 10.1007/s12031-016-0853-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Accepted: 10/21/2016] [Indexed: 01/08/2023]
Abstract
Emerging evidence has demonstrated an important role of microRNAs (miRNAs) in the pathogenesis of cerebral infarction. In the present study, a down-regulation of microRNA-433 (miR-433) is identified in hypoxia-induced human umbilical vein vascular endothelial cells (HUVECs) as well as in rat neurons, and is found to be negatively regulated cell proliferation and migration. Moreover, the expression of miR-433 is inversely correlated with the expression of hypoxia-inducible factor 1 alpha (HIF-1α), which has been shown to play critical role in responding to hypoxia conditions. Overexpression or knockdown of miR-433 responsively alters both mRNA and protein levels of HIF-1α and its downstream genes, vascular endothelial growth factor, Glut-1, and Angpt2. In a luciferase reporter system, miR-433 down-regulates the luciferase activity of HIF-1α 3'-UTR, and these effects are abolished by a mutation in the putative miR-433-binding site. Further investigation confirms that knockdown of HIF-1α blocked the stimulatory effect of anti-miR-433, while overexpression of HIF-1α reversed the inhibitory effects of pre-miR-433 on proliferation and migration of HUVEC and neurons. Taken together, our findings indicate that miR-433 plays an important role in response to hypoxia, inhibiting HUVEC and neuron proliferation and migration by down-regulating HIF-1α.
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Affiliation(s)
- Lin Zhang
- Institute of neurobiology, Xi'an Jiaotong Univerisity Health Science Center, No. 76 West Yanta street, Xi'an, 710061, China.,Department of Neurology, Xi'an Central Hospital, Xi'an, 710003, China
| | - Yuanxiao Zhang
- Department of Neurology, Xi'an Central Hospital, Xi'an, 710003, China
| | - Xiaohua Zhang
- Institute of neurobiology, Xi'an Jiaotong Univerisity Health Science Center, No. 76 West Yanta street, Xi'an, 710061, China
| | - Yan Zhang
- School of Pharmaceutical Sciences, Xi'an Medical University, Xi'an, 710021, China
| | - Yi Jiang
- Department of Neurology, Xi'an Central Hospital, Xi'an, 710003, China
| | - Xinli Xiao
- Institute of neurobiology, Xi'an Jiaotong Univerisity Health Science Center, No. 76 West Yanta street, Xi'an, 710061, China
| | - Jing Tan
- Department of Anesthesia, The first Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, 710061, China
| | - Wei Yuan
- Department of Cardiology, Xi'an North Hospital, Xi'an, 710043, China
| | - Yong Liu
- Institute of neurobiology, Xi'an Jiaotong Univerisity Health Science Center, No. 76 West Yanta street, Xi'an, 710061, China.
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19
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Rudraiah S, Zhang X, Wang L. Nuclear Receptors as Therapeutic Targets in Liver Disease: Are We There Yet? Annu Rev Pharmacol Toxicol 2016; 56:605-626. [PMID: 26738480 DOI: 10.1146/annurev-pharmtox-010715-103209] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Nuclear receptors (NR) are ligand-modulated transcription factors that play diverse roles in cell differentiation, development, proliferation, and metabolism and are associated with numerous liver pathologies such as cancer, steatosis, inflammation, fibrosis, cholestasis, and xenobiotic/drug-induced liver injury. The network of target proteins associated with NRs is extremely complex, comprising coregulators, small noncoding microRNAs, and long noncoding RNAs. The importance of NRs as targets of liver disease is exemplified by the number of NR ligands that are currently used in the clinics or in clinical trials with promising results. Understanding the regulation by NR during pathophysiological conditions, and identifying ligands for orphan NR, points to a potential therapeutic approach for patients with liver diseases. An overview of complex NR metabolic networks and their pharmacological implications in liver disease is presented here.
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Affiliation(s)
- Swetha Rudraiah
- Department of Physiology and Neurobiology and The Institute for Systems Genomics, University of Connecticut, Storrs, Connecticut 06269
| | - Xi Zhang
- Department of Physiology and Neurobiology and The Institute for Systems Genomics, University of Connecticut, Storrs, Connecticut 06269
| | - Li Wang
- Department of Physiology and Neurobiology and The Institute for Systems Genomics, University of Connecticut, Storrs, Connecticut 06269.,Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut 06516.,Department of Internal Medicine, Section of Digestive Diseases, Yale University, New Haven, Connecticut 06520
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20
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Ni W, You S, Cao Y, Li C, Wei J, Wang D, Qiao J, Zhao X, Hu S, Quan R. Aberrant expression of miR-127, miR-21 and miR-16 in placentas of deceased cloned sheep. Res Vet Sci 2016; 105:200-4. [PMID: 27033933 DOI: 10.1016/j.rvsc.2016.02.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 01/22/2016] [Accepted: 02/21/2016] [Indexed: 01/01/2023]
Abstract
Placental deficiencies are associated with developmental abnormalities of animal produced by somatic cell nuclear transfer (SCNT). It is reported that aberrant expression of microRNAs (miRNAs) in the common placenta is associated with fetal growth restriction and placental deficiencies. However, an understanding of the expression and function of miRNAs in the placentas of cloned animal is lacking. In this study, we characterized the expression of five growth-associated miRNAs (miR-127, miR-16, miR-21, miR-93 and miR-182) in placentas of deceased transgenic cloned sheep (deceased group, n=7), live transgenic cloned sheep (live group, n=5) and conventionally produced sheep (control group, n=10). Expression levels of miR-127 (P<0.01), miR-21 (P<0.01) and miR-16 (P<0.05) were significantly up-regulated in the placentas of deceased group compared to that of control group. In contrast, the expression of these miRNAs was largely normal in the placentas of live group, except for the expression of miR-21. Furthermore, we confirmed that retrotransposon-like gene (Rtl1), a key gene in placental development, was down-regulated by miR-127 as a target in placenta cells. Our results suggested that the abnormal expression of miR-127, miR-21 and miR-16 in placentas of deceased sheep, through dysregulation of target genes, may result in developmental deficiencies of transgenic cloned sheep.
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Affiliation(s)
- Wei Ni
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang 832003, China
| | - Shuang You
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang 832003, China
| | - Yang Cao
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang 832003, China
| | - Cunyuan Li
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang 832003, China
| | - Junchuang Wei
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang 832003, China
| | - Dawei Wang
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang 832003, China
| | - Jun Qiao
- College of Animal Science and Technology, Shihezi University, Shihezi 832003, China
| | - Xinxia Zhao
- College of Animal Science and Technology, Shihezi University, Shihezi 832003, China
| | - Shengwei Hu
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang 832003, China.
| | - Renzhe Quan
- College of Life Sciences, Shihezi University, Shihezi, Xinjiang 832003, China.
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21
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Li J, Yao L, Li G, Ma D, Sun C, Gao S, Zhang P, Gao F. miR-221 Promotes Epithelial-Mesenchymal Transition through Targeting PTEN and Forms a Positive Feedback Loop with β-catenin/c-Jun Signaling Pathway in Extra-Hepatic Cholangiocarcinoma. PLoS One 2015; 10:e0141168. [PMID: 26501139 PMCID: PMC4621024 DOI: 10.1371/journal.pone.0141168] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 10/04/2015] [Indexed: 12/21/2022] Open
Abstract
Extrahepatic cholangiocarcinoma (EHCC) is a refractory malignancy with poor prognosis due to its early invasion, metastasis and recurrence after operation. Therefore, understanding the mechanisms of invasion and metastasis is the key to the development of new and effective therapeutic strategies for EHCC. In the present study we demonstrated that miR-221 promoted EHCC invasion and metastasis through targeting PTEN and formed a positive feedback loop with β-catenin/c-Jun signaling pathway. We found miR-221 was upregulated in EHCC specimens and CC cell lines. Moreover, miR-221 was found strongly associated with the metastasis and prognosis of EHCC patients. The expression of PTEN was downregulated in EHCC patients and CC cell lines, and was further demonstrated as one of the downstream targets of miR-221. In addition, our data indicated that β-catenin activated miR-221 through c-jun, while miR-221 enhanced β-catenin signaling induced-epithelial-mesenchymal transition (EMT) by targeting PTEN, hence forming a positive feedback loop in EHCC cell lines. In conclusion, our results suggested that miR-221 promotes EMT through targeting PTEN and forms a positive feedback loop with β-catenin/c-Jun signaling pathway in EHCC.
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Affiliation(s)
- Jianguo Li
- Department of General Surgery, the First Affiliated Hospital of JILIN University, Changchun, 130021, P.R. China
| | - Lei Yao
- Department of General Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, P.R. China
| | - Guodong Li
- Department of General Surgery, the Fourth Affiliated Hospital of Harbin Medical University, Harbin, 150001, P.R. China
| | - Donglai Ma
- Department of General Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, P.R. China
| | - Chen Sun
- Department of General Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, P.R. China
| | - Shuang Gao
- Heilongjiang Nursing College, Harbin, 150086, P.R. China
| | - Ping Zhang
- Department of General Surgery, the First Affiliated Hospital of JILIN University, Changchun, 130021, P.R. China
- * E-mail: (PZ); (FG)
| | - Feng Gao
- Department of General Surgery, the Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, P.R. China
- * E-mail: (PZ); (FG)
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Wang H, Liu S, Cui J, Li C, Hu Y, Zhou W, Chang Y, Qiu X, Liu Z, Wang X. Identification and Characterization of MicroRNAs from Longitudinal Muscle and Respiratory Tree in Sea Cucumber (Apostichopus japonicus) Using High-Throughput Sequencing. PLoS One 2015; 10:e0134899. [PMID: 26244987 PMCID: PMC4526669 DOI: 10.1371/journal.pone.0134899] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Accepted: 07/15/2015] [Indexed: 01/01/2023] Open
Abstract
MicroRNAs (miRNAs), as a family of non-coding small RNAs, play important roles in the post-transcriptional regulation of gene expression. Sea cucumber (Apostichopus japonicus) is an important economic species which is widely cultured in East Asia. The longitudinal muscle (LTM) and respiratory tree (RPT) are two important tissues in sea cucumber, playing important roles such as respiration and movement. In this study, we identified and characterized miRNAs in the LTM and RPT of sea cucumber (Apostichopus japonicus) using Illumina HiSeq 2000 platform. A total of 314 and 221 conserved miRNAs were identified in LTM and RPT, respectively. In addition, 27 and 34 novel miRNAs were identified in the LTM and RPT, respectively. A set of 58 miRNAs were identified to be differentially expressed between LTM and RPT. Among them, 9 miRNAs (miR-31a-3p, miR-738, miR-1692, let-7a, miR-72a, miR-100b-5p, miR-31b-5p, miR-429-3p, and miR-2008) in RPT and 7 miRNAs (miR-127, miR-340, miR-381, miR-3543, miR-434-5p, miR-136-3p, and miR-300-3p) in LTM were differentially expressed with foldchange value being greater than 10. A total of 14,207 and 12,174 target genes of these miRNAs were predicted, respectively. Functional analysis of these target genes of miRNAs were performed by GO analysis and pathway analysis. This result provided in this work will be useful for understanding biological characteristics of the LTM and RPT of sea cucumber and assisting molecular breeding of sea cucumber for aquaculture.
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Affiliation(s)
- Hongdi Wang
- Key Laboratory of Mariculture & Stock Enhancement in North China’s Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China
| | - Shikai Liu
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences and Program of Cell and Molecular Biosciences, Auburn University, Auburn, AL 36849, United States of America
| | - Jun Cui
- Key Laboratory of Mariculture & Stock Enhancement in North China’s Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China
| | - Chengze Li
- Key Laboratory of Mariculture & Stock Enhancement in North China’s Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China
| | - Yucai Hu
- Key Laboratory of Mariculture & Stock Enhancement in North China’s Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China
- School of Science, Dalian Ocean University, Dalian 116023, China
| | - Wei Zhou
- Key Laboratory of Mariculture & Stock Enhancement in North China’s Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China
| | - Yaqing Chang
- Key Laboratory of Mariculture & Stock Enhancement in North China’s Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China
| | - Xuemei Qiu
- Key Laboratory of Mariculture & Stock Enhancement in North China’s Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China
| | - Zhanjiang Liu
- The Fish Molecular Genetics and Biotechnology Laboratory, Aquatic Genomics Unit, School of Fisheries, Aquaculture and Aquatic Sciences and Program of Cell and Molecular Biosciences, Auburn University, Auburn, AL 36849, United States of America
| | - Xiuli Wang
- Key Laboratory of Mariculture & Stock Enhancement in North China’s Sea, Ministry of Agriculture, Dalian Ocean University, Dalian 116023, China
- * E-mail:
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23
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Wang XC, Ma Y, Meng PS, Han JL, Yu HY, Bi LJ. miR-433 inhibits oral squamous cell carcinoma (OSCC) cell growth and metastasis by targeting HDAC6. Oral Oncol 2015; 51:674-82. [DOI: 10.1016/j.oraloncology.2015.04.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 03/04/2015] [Accepted: 04/15/2015] [Indexed: 12/22/2022]
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van der Kolk JH, Pacholewska A, Gerber V. The role of microRNAs in equine medicine: a review. Vet Q 2015; 35:88-96. [PMID: 25695624 DOI: 10.1080/01652176.2015.1021186] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The search for new markers of diseases in human as well as veterinary medicine is ongoing. Recently, microRNAs (miRNAs or miRs) have emerged as potential new biomarkers. MiRNAs are short sequences of RNA (∼22 nucleotides) that regulate gene expression via their target messenger RNA (mRNA). Circulating miRNAs in blood can be used as novel diagnostic markers for diseases due to their evolutionary conservation and stability. As a consequence of their systemic and manifold effects on the gene expression in various target organs, the concept that miRNAs could function as hormones has been suggested. This review summarizes the biogenesis, maturation, and stability of miRNAs and discusses their use as potential biomarkers in equine medicine. To date, over 700 equine miRNAs are identified with distinct subsets of miRNAs differentially expressed in a tissue-specific manner. A physiological involvement of various miRNAs in the regulation of cell survival, steroidogenesis, and differentiation during follicle selection and ovulation in the monovular equine ovary has been demonstrated. Furthermore, miRNAs might be used as novel diagnostic markers for myopathies such as polysaccharide storage myopathy and recurrent exertional rhabdomyolysis as well as osteochondrosis. Preliminary data indicate that miRNAs in blood might play important roles in equine glucose metabolism pathway. Of note, breed differences have been reported regarding the normal equine miRNA signature. For disease prevention, it is of utmost importance to identify disease-associated biomarkers which help detect diseases before symptoms appear. As such, circulating miRNAs represent promising novel diagnostic markers in equine medicine.
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Affiliation(s)
- J H van der Kolk
- a Department of Clinical Veterinary Medicine, Vetsuisse Faculty, Swiss Institute for Equine Medicine (ISME) , University of Bern and Agroscope , Länggassstrasse 124, 3012 Bern , Switzerland
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25
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Emerging role of microRNAs in lipid metabolism. Acta Pharm Sin B 2015; 5:145-50. [PMID: 26579440 PMCID: PMC4629215 DOI: 10.1016/j.apsb.2015.01.002] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 12/24/2014] [Accepted: 01/04/2015] [Indexed: 12/18/2022] Open
Abstract
microRNAs (miRNAs or miRs) are small non-coding RNAs that are involved in post-transcriptional regulation of their target genes in a sequence-specific manner. Emerging evidence demonstrates that miRNAs are critical regulators of lipid synthesis, fatty acid oxidation and lipoprotein formation and secretion. Dysregulation of miRNAs disrupts gene regulatory network, leading to metabolic syndrome and its related diseases. In this review, we introduced epigenetic and transcriptional regulation of miRNAs expression. We emphasized on several representative miRNAs that are functionally involved into lipid metabolism, including miR-33/33⁎, miR122, miR27a/b, miR378/378⁎, miR-34a and miR-21. Understanding the function of miRNAs in lipid homeostasis may provide potential therapeutic strategies for fatty liver disease.
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Key Words
- ABCA1, adenosine triphosphate-binding cassette transporter A1
- ABCG1, adenosine triphosphate-binding cassette transporter G1
- AMPKα, AMP-activated protein kinase α
- ATP8B1, aminophospholipid transporter, class I, type 8B, member 1
- Ago2, argonaute 2
- ApoA1, apolipoprotein A1
- BDL, bile-duct ligation
- CPT1A, carnitine palmitoyltransferase 1A
- CRAT, carnitine O-acetyltransferase
- CYP26, cytochrome P450 family 26
- CYP3A4, cytochrome P450 family 3 subfamily A polypeptide 4
- ERRγ, estrogen-related receptor gamma
- FABP7, fatty acid-binding protein 7
- FASN, fatty acid synthase
- FGF21, fibroblast growth factor 21
- FGFR1, fibroblast growth factor receptor 1
- FXR, farnesoid X receptor
- GABPA, GA binding protein transcription factor alpha subunit
- GPC6, glypican 6
- HADHB, hydroxyacyl-CoA dehydrogenase/3-ketoacyl-CoA thiolase/enoyl-CoA hydratase trifunctional protein, beta subunit
- HCC, hepatocellular carcinoma
- HCV, hepatitis C virus
- HMGCR, 3-hydroxy-3-methylglutaryl-coenzyme A reductase
- HMGCS1, 3-hydroxy-3-methylglutaryl-coenzyme A synthase 1
- HNE, 4-hydroxynonenal
- IGF1R, insulin-like growth factor 1 receptor
- IGFBP3, insulin-like growth factor binding protein 3
- INSIG1, insulin induced gene 1
- LIPE, lipase hormone-sensitive
- LNA, locked nucleic acids
- LNPs, lipid-based nanoparticles
- LPS, lipopolysaccharide
- Lipid metabolism
- MED13, mediator complex subunit 13
- MHV68, murine γ-herpesvirus 68
- MTTP, microsomal TG transfer protein
- NR1D1/REV-ERBα, transcriptional repressor nuclear receptor subfamily 1 group D member 1
- NRs, nuclear receptors
- Nuclear receptors
- PCK1, phosphoenolpyruvate carboxykinase 1
- PDCD4, programmed cell death 4
- PGC-1, peroxisone proliferator-activated receptor gamma coactivator
- PLIN1, perilipin 1
- PNA, peptide nucleic acid
- PNPLA2, patatin-like phospholipase domain containing 2
- PPARγ, peroxisone proliferator-activated receptor gamma
- RTL1, retrotransposon-like 1
- RXRα, retinoid X receptor alpha
- SHP, small heterodimer partner
- SIRT1, sirtuin 1
- SIRT6, sirtuin 6
- TG, triglyceride
- TLR4, toll-like receptor 4
- miRNAs or miRs, microRNAs
- microRNAs
- pre-miRNAs, precursor-miRNAs
- pri-miRNAs, primary-miRNAs
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Kim MC, Lee SW, Ryu DY, Cui FJ, Bhak J, Kim Y. Identification and characterization of microRNAs in normal equine tissues by Next Generation Sequencing. PLoS One 2014; 9:e93662. [PMID: 24695583 PMCID: PMC3973549 DOI: 10.1371/journal.pone.0093662] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2014] [Accepted: 03/04/2014] [Indexed: 12/31/2022] Open
Abstract
The role of microRNAs (miRNAs) as a post-transcriptional gene regulator has been elucidated in a broad range of organisms including domestic animals. Characterization of miRNAs in normal tissues is an important step to investigate the functions of miRNAs in various physiological and pathological conditions. Using Illumina Next Generation Sequencing (NGS) technology, we identified a total of 292 known and 329 novel miRNAs in normal horse tissues including skeletal muscle, colon and liver. Distinct sets of miRNAs were differentially expressed in a tissue-specific manner. The miRNA genes were distributed across all the chromosomes except chromosomes 29 and 31 in the horse reference genome. In some chromosomes, multiple miRNAs were clustered and considered to be polycistronic transcript. A base composition analysis showed that equine miRNAs had a higher frequency of A+U than G+C. Furthermore, U tended to be more frequent at the 5′ end of miRNA sequences. This is the first experimental study that identifies and characterizes the global miRNA expression profile in normal horse tissues. The present study enriches the horse miRNA database and provides useful information for further research dissecting biological functions of miRNAs in horse.
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Affiliation(s)
- Myung-Chul Kim
- Laboratory of Clinical Pathology, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Seung-Woo Lee
- Laboratory of Environmental Health, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Doug-Young Ryu
- Laboratory of Environmental Health, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Feng-Ji Cui
- Laboratory of Clinical Pathology, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Jong Bhak
- Theragen Bio Institute, Suwon-city, Gyeonggi-do, Republic of Korea
| | - Yongbaek Kim
- Laboratory of Clinical Pathology, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
- Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
- * E-mail:
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27
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Chen J, Wang M, Guo M, Xie Y, Cong YS. miR-127 regulates cell proliferation and senescence by targeting BCL6. PLoS One 2013; 8:e80266. [PMID: 24282530 PMCID: PMC3840165 DOI: 10.1371/journal.pone.0080266] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Accepted: 10/11/2013] [Indexed: 01/31/2023] Open
Abstract
Cellular senescence occurs as a response to extracellular and intracellular stresses and contributes to aging and age-related pathologies. Emerging evidence suggests that cellular senescence also acts as a potent tumor suppression mechanism that prevents the oncogenic transformation of primary human cells. Recent reports have indicated that miRNAsact as key modulators of cellular senescence by targeting critical regulators of the senescence pathways. We previously reported that miR-127 is up-regulated in senescent fibroblasts. In this report, we identified miR-127 as a novel regulator of cellular senescence that directly targets BCL6. We further showed that miR-127 is down-regulated in breast cancer tissuesand that this down-regulation is associated with up-regulation of BCL6. Over-expression of miR-127 or depletion of BCL6 inhibits breast cancer cell proliferation. Our data suggest that miR-127 may function as a tumor suppressor that modulates the oncogene BCL6.
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Affiliation(s)
- Jingwen Chen
- Key Laboratory for Cell Proliferation and Regulation Biology of Ministry of Education, Institute of Cell Biology, College of Life Sciences, Beijing Normal University, Beijing, China
- Institute of Aging Research, Hangzhou Normal University School of Medicine, Hangzhou, China
| | - Miao Wang
- Institute of Aging Research, Hangzhou Normal University School of Medicine, Hangzhou, China
| | - Mingzhou Guo
- Department of Gastroenterology &Hepatology, Chinese PLA General Hospital, Beijing, China
| | - Yuntao Xie
- Breast Center, Beijing Cancer Hospital & Institute, Peking University Cancer Hospital, Beijing, P. R. China
| | - Yu-Sheng Cong
- Institute of Aging Research, Hangzhou Normal University School of Medicine, Hangzhou, China
- * E-mail:
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28
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Del Vescovo V, Meier T, Inga A, Denti MA, Borlak J. A cross-platform comparison of affymetrix and Agilent microarrays reveals discordant miRNA expression in lung tumors of c-Raf transgenic mice. PLoS One 2013; 8:e78870. [PMID: 24265725 PMCID: PMC3827083 DOI: 10.1371/journal.pone.0078870] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 09/20/2013] [Indexed: 02/08/2023] Open
Abstract
Non-coding RNAs play major roles in the translational control of gene expression. In order to identify disease-associated miRNAs in precursor lesions of lung cancer, RNA extracts from lungs of either c-Raf transgenic or wild-type (WT) mice were hybridized to the Agilent and Affymetrix miRNA microarray platforms, respectively. This resulted in the detection of a range of miRNAs varying between 111 and 267, depending on the presence or absence of the transgene, on the gender, and on the platform used. Importantly, when the two platforms were compared, only 11–16% of the 586 overlapping genes were commonly detected. With the Agilent microarray, seven miRNAs were identified as significantly regulated, of which three were selectively up-regulated in male transgenic mice. Much to our surprise, when the same samples were analyzed with the Affymetrix platform, only two miRNAs were identified as significantly regulated. Quantitative PCR performed with lung RNA extracts from WT and transgenic mice confirmed only partially the differential expression of significant regulated miRNAs and established that the Agilent platform failed to detect miR-433. Finally, bioinformatic analyses predicted a total of 152 mouse genes as targets of the regulated miRNAs of which 4 and 11 genes were significantly regulated at the mRNA level, respectively in laser micro-dissected lung dysplasia and lung adenocarcinomas of c-Raf transgenic mice. Furthermore, for many of the predicted mouse target genes expression of the coded protein was also repressed in human lung cancer when the publically available database of the Human Protein Atlas was analyzed, thus supporting the clinical significance of our findings. In conclusion, a significant difference in a cross-platform comparison was observed that will have important implications for research into miRNAs.
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Affiliation(s)
- Valerio Del Vescovo
- Centre of Integrative Biology (CIBIO), University of Trento, Trento, Italy
- Centre for Pharmacology and Toxicology, Hannover Medical School, Hannover, Germany
| | - Tatiana Meier
- Centre for Pharmacology and Toxicology, Hannover Medical School, Hannover, Germany
| | - Alberto Inga
- Centre of Integrative Biology (CIBIO), University of Trento, Trento, Italy
| | | | - Juergen Borlak
- Centre for Pharmacology and Toxicology, Hannover Medical School, Hannover, Germany
- * E-mail:
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29
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Yang Z, Tsuchiya H, Zhang Y, Hartnett ME, Wang L. MicroRNA-433 inhibits liver cancer cell migration by repressing the protein expression and function of cAMP response element-binding protein. J Biol Chem 2013; 288:28893-9. [PMID: 23979134 DOI: 10.1074/jbc.m113.502682] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
We show for the first time that potent microRNA-433 (miR-433) inhibition of expression of the cAMP response element-binding protein CREB1 represses hepatocellular carcinoma (HCC) cell migration. We identified a miR-433 seed match region in human and mouse CREB1 3'-UTRs. Overexpression of miR-433 markedly decreased human CREB1 3'-UTR reporter activity, and the inhibitory effect of miR-433 was alleviated upon mutation of its binding site. Ectopic expression of miR-433 reduced CREB1 protein levels in a variety of human and mouse cancer cells, including HeLa, Hepa1, Huh7, and HepG2. Human CREB1 protein levels in highly invasive MHCC97H cells were diminished by expression of miR-433 but were induced by miR-433 antagomir (anti-miR-433). The expression of mouse CREB1 protein negatively correlated with miR-433 levels in nuclear receptor Shp(-/-) liver tissues and liver tumors compared with wild-type mice. miR-433 exhibited a significant repression of MHCC97H cell migration, which was reversed by anti-miR-433. Overexpressing miR-433 inhibited focus formation dramatically, demonstrating that miR-433 may exert a tumor suppressor function. Knockdown of CREB1 by siRNAs impeded MHCC97H cell migration and invasion and antagonized the effect of anti-miR-433. Interestingly, CREB1 siRNA decreased MHCC97H cell proliferation, which was not influenced by anti-miR-433. Overexpressing CREB1 decreased the inhibitory activity of miR-433. The CpG islands surrounding miR-433 were hypermethylated, and the DNA methylation agent 5'-aza-2'-deoxycytidine, but not the histone deacetylase inhibitor trichostatin A, drastically stimulated the expression of miR-433 and miR-127 in HCC cells. The latter is clustered with miR-433. The results reveal a critical role of miR-433 in mediating HCC cell migration via CREB1.
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Affiliation(s)
- Zhihong Yang
- From the Departments of Medicine and Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, and
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30
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The Tumor Suppressor Roles of miR-433 and miR-127 in Gastric Cancer. Int J Mol Sci 2013; 14:14171-84. [PMID: 23880861 PMCID: PMC3742237 DOI: 10.3390/ijms140714171] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Revised: 06/26/2013] [Accepted: 06/27/2013] [Indexed: 12/27/2022] Open
Abstract
The discovery of microRNAs (miRNAs) provides a new and powerful tool for studying the mechanism, diagnosis and treatment of human cancers. Currently, the methylation epigenetic silencing of miRNAs with tumor suppressor features by CpG island hypermethylation is emerging as a common hallmark of different tumors. Here we showed that miR-433 and miR-127 were significantly down-regulated in gastric cancer (GC) tissues compared with the adjacent normal regions in 86 paired samples. Moreover, the lower level of miR-433 and miR-127 was associated with pM or pTNM stage in clinical gastric cancer patients. The restored expression of miR-433 and miR-127 in GC cells upon 5-Aza-CdR and TSA treatment suggested the loss of miR-433 and miR-127 was at least partly regulated by epigenetic modification in GC. Furthermore, the ectopic expression of miR-433 and miR-127 in gastric cancer cell lines HGC-27 inhibits cell proliferation, cell cycle progression, cell migration and invasion by directly interacting with the mRNA encoding oncogenic factors KRAS and MAPK4 respectively. Taken together, our results showed that miR-433 and miR-127 might act as tumor suppressors in GC, and it may provide novel diagnostic and therapeutic options for human GC clinical operation in the near future.
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31
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Yang Z, Zhang Y, Wang L. A feedback inhibition between miRNA-127 and TGFβ/c-Jun cascade in HCC cell migration via MMP13. PLoS One 2013; 8:e65256. [PMID: 23762330 PMCID: PMC3676458 DOI: 10.1371/journal.pone.0065256] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Accepted: 04/25/2013] [Indexed: 12/19/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the fifth most common cancer worldwide and is increasing in frequency in the U.S. The major reason for the low postoperative survival rate of HCC is widespread intrahepatic metastasis or invasion, and activation of TGFβ signaling is associated with the invasive phenotype. This study aims at determining the novel function of miR-127 in modulating HCC migration. Overexpression of miR-127 inhibits HCC cell migration, invasion and tumor growth in nude mice. MiR-127 directly represses matrix metalloproteinase 13 (MMP13) 3'UTR activity and protein expression, and diminishes MMP13/TGFβ-induced HCC migration. In turn, TGFβ decreases miR-127 expression by enhancing c-Jun-mediated inhibition of miR-127 promoter activity. In contrast, p53 transactivates miR-127 promoter and induces miR-127 expression, which is antagonized by c-Jun. The inhibition of miR-127 by c-Jun is through TGFβ-mediated ERK and JNK pathways. The lower miR-127 expression shows a negative correlation with the higher MMP13 expression in a subset of human HCC specimens. This is the first report elucidating a feedback regulation between miR-127 and the TGFβ/c-Jun cascade in HCC migration via MMP13 that involves a crosstalk between the oncogene c-Jun and tumor suppressor p53.
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Affiliation(s)
- Zhihong Yang
- Departments of Medicine and Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Yuxia Zhang
- Departments of Medicine and Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Li Wang
- Departments of Medicine and Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
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32
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Benetatos L, Hatzimichael E, Londin E, Vartholomatos G, Loher P, Rigoutsos I, Briasoulis E. The microRNAs within the DLK1-DIO3 genomic region: involvement in disease pathogenesis. Cell Mol Life Sci 2013; 70:795-814. [PMID: 22825660 PMCID: PMC11114045 DOI: 10.1007/s00018-012-1080-8] [Citation(s) in RCA: 212] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2011] [Revised: 06/26/2012] [Accepted: 06/28/2012] [Indexed: 02/07/2023]
Abstract
The mammalian genome is transcribed in a developmentally regulated manner, generating RNA strands ranging from long to short non-coding RNA (ncRNAs). NcRNAs generated by intergenic sequences and protein-coding loci, represent up to 98 % of the human transcriptome. Non-coding transcripts comprise short ncRNAs such as microRNAs, piwi-interacting RNAs, small nucleolar RNAs and long intergenic RNAs, most of which exercise a strictly controlled negative regulation of expression of protein-coding genes. In humans, the DLK1-DIO3 genomic region, located on human chromosome 14 (14q32) contains the paternally expressed imprinted genes DLK1, RTL1, and DIO3 and the maternally expressed imprinted genes MEG3 (Gtl2), MEG8 (RIAN), and antisense RTL1 (asRTL1). This region hosts, in addition to two long intergenic RNAs, the MEG3 and MEG8, one of the largest microRNA clusters in the genome, with 53 miRNAs in the forward strand and one (mir-1247) in the reverse strand. Many of these miRNAs are differentially expressed in several pathologic processes and various cancers. A better understanding of the pathophysiologic importance of the DLK1-DIO3 domain-containing microRNA cluster may contribute to innovative therapeutic strategies in a range of diseases. Here we present an in-depth review of this vital genomic region, and examine the role the microRNAs of this region may play in controlling tissue homeostasis and in the pathogenesis of some human diseases, mostly cancer, when aberrantly expressed. The potential clinical implications of this data are also discussed.
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Affiliation(s)
- Leonidas Benetatos
- Transfusion Unit, General Hospital of Preveza, Selefkias 2, 48100, Preveza, Greece.
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33
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Aguado-Fraile E, Ramos E, Sáenz-Morales D, Conde E, Blanco-Sánchez I, Stamatakis K, del Peso L, Cuppen E, Brüne B, Bermejo MLG. miR-127 protects proximal tubule cells against ischemia/reperfusion: identification of kinesin family member 3B as miR-127 target. PLoS One 2012; 7:e44305. [PMID: 22962609 PMCID: PMC3433485 DOI: 10.1371/journal.pone.0044305] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 08/01/2012] [Indexed: 11/26/2022] Open
Abstract
Ischemia/reperfusion (I/R) is at the basis of renal transplantation and acute kidney injury. Molecular mechanisms underlying proximal tubule response to I/R will allow the identification of new therapeutic targets for both clinical settings. microRNAs have emerged as crucial and tight regulators of the cellular response to insults including hypoxia. Here, we have identified several miRNAs involved in the response of the proximal tubule cell to I/R. Microarrays and RT-PCR analysis of proximal tubule cells submitted to I/R mimicking conditions in vitro demonstrated that miR-127 is induced during ischemia and also during reperfusion. miR-127 is also modulated in a rat model of renal I/R. Interference approaches demonstrated that ischemic induction of miR-127 is mediated by Hypoxia Inducible Factor-1alpha (HIF-1α) stabilization. Moreover, miR-127 is involved in cell-matrix and cell-cell adhesion maintenance, since overexpression of miR-127 maintains focal adhesion complex assembly and the integrity of tight junctions. miR-127 also regulates intracellular trafficking since miR-127 interference promotes dextran-FITC uptake. In fact, we have identified the Kinesin Family Member 3B (KIF3B), involved in cell trafficking, as a target of miR-127 in rat proximal tubule cells. In summary, we have described a novel role of miR-127 in cell adhesion and its regulation by HIF-1α. We also identified for the first time KIF3B as a miR-127 target. Both, miR-127 and KIF3B appear as key mediators of proximal epithelial tubule cell response to I/R with potential al application in renal ischemic damage management.
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Affiliation(s)
- Elia Aguado-Fraile
- Department of Pathology, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Edurne Ramos
- Department of Pathology, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - David Sáenz-Morales
- Department of Pathology, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Elisa Conde
- Department of Pathology, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Ignacio Blanco-Sánchez
- Department of Pathology, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Konstantinos Stamatakis
- Department of Cell Biology and Immunology, Centro de Biología Molecular Severo Ochoa (CBM-SO) (CSIC-UAM), Madrid, Spain
| | - Luis del Peso
- Department of Biochemistry/HIV Unit, Hospital La Paz (IdiPAZ), Madrid, Spain
- Institute of Biomedical Research Alberto Sols, CSIC-UAM, Madrid, Spain
| | - Edwin Cuppen
- Genome Biology Group, Hubrecht Institute, Utrecht, The Netherlands
| | - Bernhard Brüne
- Pathobiochemistry, Faculty of Medicine, Goethe-University Frankfurt, Frankfurt, Germany
| | - María Laura García Bermejo
- Department of Pathology, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
- Physiology Department, Alcalá University, Madrid, Spain
- * E-mail:
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34
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Cross-regulation of protein stability by p53 and nuclear receptor SHP. PLoS One 2012; 7:e39789. [PMID: 22737255 PMCID: PMC3380837 DOI: 10.1371/journal.pone.0039789] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 05/31/2012] [Indexed: 12/20/2022] Open
Abstract
We report here a novel interplay between tumor suppressor p53 and nuclear receptor SHP that controls p53 and SHP stability. Overexpression of p53 causes rapid SHP protein degradation, which does not require the presence of Mdm2 and is mediated by the proteosome pathway. Overexpressing SHP alone does not affect p53 stability. However, SHP destabilizes p53 by augmentation of Mdm2 ubiquitin ligase activity toward p53. The single amino acid substitution in the SHP protein SHPK170R increases SHP binding to p53 relative to SHP wild-type, whereas SHPG171A variant shows a diminished p53 binding. As a result of the cross-regulation, the tumor suppressor function of p53 and SHP in inhibition of colon cancer growth is compromised. Our findings reveal a unique scenario for a cross-inhibition between two tumor suppressors to keep their expression and function in check.
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35
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Pan C, Chen H, Wang L, Yang S, Fu H, Zheng Y, Miao M, Jiao B. Down-regulation of MiR-127 facilitates hepatocyte proliferation during rat liver regeneration. PLoS One 2012; 7:e39151. [PMID: 22720056 PMCID: PMC3376093 DOI: 10.1371/journal.pone.0039151] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Accepted: 05/16/2012] [Indexed: 01/27/2023] Open
Abstract
Liver regeneration (LR) after partial hepatectomy (PH) involves the proliferation and apoptosis of hepatocytes, and microRNAs have been shown to post-transcriptionally regulate genes involved in the regulation of these processes. To explore the role of miR-127 during LR, the expression patterns of miR-127 and its related proteins were investigated. MiR-127 was introduced into a rat liver cell line to examine its effects on the potential target genes Bcl6 and Setd8, and functional studies were undertaken. We discovered that miR-127 was down-regulated and inversely correlated with the expression of Bcl6 and Setd8 at 24 hours after PH, a time at which hypermethylation of the promoter region of the miR-127 gene was detected. Furthermore, in BRL-3A rat liver cells, we observed that overexpression of miR-127 significantly suppressed cell growth and directly inhibited the expression of Bcl6 and Setd8. The results suggest that down-regulation of miR-127 may be due to the rapid methylation of its promoter during the first 24 h after PH, and this event facilitates hepatocyte proliferation by releasing Bcl6 and Setd8. These findings support a miRNA-mediated negative regulation pattern in LR and implicate an anti-proliferative role for miR-127 in liver cells.
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Affiliation(s)
- Chuanyong Pan
- Department of Biochemistry and Molecular Biology, Second Military Medical University, Shanghai, China
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36
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Zhang Y, Andrews GK, Wang L. Zinc-induced Dnmt1 expression involves antagonism between MTF-1 and nuclear receptor SHP. Nucleic Acids Res 2012; 40:4850-60. [PMID: 22362755 PMCID: PMC3367194 DOI: 10.1093/nar/gks159] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2011] [Revised: 01/24/2012] [Accepted: 01/28/2012] [Indexed: 11/14/2022] Open
Abstract
Dnmt1 is frequently overexpressed in cancers, which contributes significantly to cancer-associated epigenetic silencing of tumor suppressor genes. However, the mechanism of Dnmt1 overexpression remains elusive. Herein, we elucidate a pathway through which nuclear receptor SHP inhibits zinc-dependent induction of Dnmt1 by antagonizing metal-responsive transcription factor-1 (MTF-1). Zinc treatment induces Dnmt1 transcription by increasing the occupancy of MTF-1 on the Dnmt1 promoter while decreasing SHP expression. SHP in turn represses MTF-1 expression and abolishes zinc-mediated changes in the chromatin configuration of the Dnmt1 promoter. Dnmt1 expression is increased in SHP-knockout (sko) mice but decreased in SHP-transgenic (stg) mice. In human hepatocellular carcinoma (HCC), increased DNMT1 expression is negatively correlated with SHP levels. Our study provides a molecular explanation for increased Dnmt1 expression in HCC and highlights SHP as a potential therapeutic target.
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MESH Headings
- Animals
- Carcinoma, Hepatocellular/enzymology
- Carcinoma, Hepatocellular/genetics
- Cell Line
- Cell Line, Tumor
- DNA (Cytosine-5-)-Methyltransferase 1
- DNA (Cytosine-5-)-Methyltransferases/biosynthesis
- DNA (Cytosine-5-)-Methyltransferases/genetics
- DNA (Cytosine-5-)-Methyltransferases/metabolism
- DNA-Binding Proteins/antagonists & inhibitors
- DNA-Binding Proteins/metabolism
- Gene Expression Regulation, Enzymologic
- Gene Expression Regulation, Neoplastic
- Hepatocytes/enzymology
- Humans
- Liver/enzymology
- Liver Neoplasms/enzymology
- Liver Neoplasms/genetics
- Mice
- Mice, Knockout
- Mice, Transgenic
- Receptors, Cytoplasmic and Nuclear/genetics
- Receptors, Cytoplasmic and Nuclear/metabolism
- Repressor Proteins/metabolism
- Transcription Factors/antagonists & inhibitors
- Transcription Factors/metabolism
- Transcription, Genetic/drug effects
- Zinc/pharmacology
- Transcription Factor MTF-1
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Affiliation(s)
- Yuxia Zhang
- Department of Medicine and Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT 84132 and Department of Biochemistry and Molecular Biology, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Glen K. Andrews
- Department of Medicine and Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT 84132 and Department of Biochemistry and Molecular Biology, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Li Wang
- Department of Medicine and Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT 84132 and Department of Biochemistry and Molecular Biology, University of Kansas Medical Center, Kansas City, KS 66160, USA
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37
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Yang Z, Wang L. An autoregulatory feedback loop between Mdm2 and SHP that fine tunes Mdm2 and SHP stability. FEBS Lett 2012; 586:1135-40. [PMID: 22575647 DOI: 10.1016/j.febslet.2012.03.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 03/06/2012] [Accepted: 03/12/2012] [Indexed: 02/07/2023]
Abstract
Mdm2 is a crucial negative regulator of the tumor suppressor function of p53. However, little is known about Mdm2 protein stability regulation by other tumor suppressors. Nuclear receptor small heterodimer partner (SHP, NROB2) functions as a tumor suppressor in liver cancer. We show here a surprising finding of a feedback regulatory loop between SHP and Mdm2. SHP stabilizes Mdm2 protein by abrogating Mdm2 self-ubiquitination, and Mdm2 in turn attenuates SHP protein levels under p53-deficient conditions. Such cross-regulation critically depends on the physical interaction of SHP with Mdm2 through the SHP K170 residue. The Mdm2-SHP interplay represents a novel component of Mdm2 signaling that is likely to dictate Mdm2 activity and function.
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Affiliation(s)
- Zhihong Yang
- Department of Medicine, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT 84132, United States
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38
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Willers IM, Martínez-Reyes I, Martínez-Diez M, Cuezva JM. miR-127-5p targets the 3'UTR of human β-F1-ATPase mRNA and inhibits its translation. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2012; 1817:838-48. [PMID: 22433606 DOI: 10.1016/j.bbabio.2012.03.005] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Revised: 03/01/2012] [Accepted: 03/02/2012] [Indexed: 12/30/2022]
Abstract
The mitochondrial H(+)-ATP synthase is a bottleneck component in the provision of metabolic energy by oxidative phosphorylation. The expression of its catalytic subunit (β-F1-ATPase) is stringently controlled at post-transcriptional levels during oncogenesis, the cell cycle and in development. Here we show that miR-127-5p targets the 3'UTR of β-F1-ATPase mRNA (β-mRNA) significantly reducing its translational efficiency without affecting β-mRNA abundance. Despite the reduced expression of β-F1-ATPase in most human carcinomas, we observed no expression of miR-127-5p in different human cancer cell lines, minimizing the potential role of miR-127-5p as a regulator of the bioenergetic activity of mitochondria in cancer. In contrast, miR-127-5p is highly over-expressed in the human fetal liver. Consistent with previous findings in the rat, the expression of β-F1-ATPase in the human liver also seems to be controlled at post-transcriptional levels during development, what might suggest a role for miR-127-5p in controlling β-mRNA translation and thus in defining the bioenergetic activity of human liver mitochondria. Moreover, immunolocalization techniques and subcellular fractionation experiments using different antibodies against β-F1-ATPase reveal that the ectopic expression of β-F1-ATPase at the cell surface of the hepatocytes and HepG2 cells is negligible or stands for scrutiny.
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Affiliation(s)
- Imke M Willers
- Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa, CSIC-UAM, Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, Instituto de Investigación Hospital 12 de Octubre, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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39
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Zhang Y, Yang Z, Whitby R, Wang L. Regulation of miR-200c by nuclear receptors PPARα, LRH-1 and SHP. Biochem Biophys Res Commun 2011; 416:135-9. [PMID: 22100809 DOI: 10.1016/j.bbrc.2011.11.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Accepted: 11/03/2011] [Indexed: 12/17/2022]
Abstract
We investigated regulation of miR-200c expression by nuclear receptors. Ectopic expression of miR-200c inhibited MHCC97H cell migration, which was abrogated by the synergistic effects of PPARα and LRH-1 siRNAs. The expression of miR-200c was decreased by PPARα/LRH-1 siRNAs and increased by SHP siRNAs, and overexpression of the receptors reversed the effects of their respective siRNAs. SHP siRNAs also drastically enhanced the ability of the LRH-1 agonist RJW100 to induce miR-200c and downregulate ZEB1 and ZEB2 proteins. Co-expression of PPARα and LRH-1 moderately transactivated the miR-200c promoter, which was repressed by SHP co-expression. RJW100 caused strong activation of the miR-200c promoter. This is the first report to demonstrate that miR-200c expression is controlled by nuclear receptors.
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Affiliation(s)
- Yuxia Zhang
- Department of Medicine, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT 84132, USA
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40
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Yang Z, Wang L. Regulation of microRNA expression and function by nuclear receptor signaling. Cell Biosci 2011; 1:31. [PMID: 21936947 PMCID: PMC3192659 DOI: 10.1186/2045-3701-1-31] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Accepted: 09/21/2011] [Indexed: 01/10/2023] Open
Abstract
MicroRNAs (miRNAs) are small non-coding RNA transcripts that affect various cellular pathways by serving as regulators of gene expression at the translational and transcriptional level. Nuclear receptors (NRs) are ligand-activated transcription factors that regulate gene transcription by binding to the promoter region or by interacting with other transcription factors. NRs can regulate miRNA expression either at the transcriptional level, or through posttranscriptional maturation by interacting with miRNA processing factors. This review will summarize recent advances in knowledge of the modulation of miRNA expression by NRs. Increased understanding of the molecular basis of miRNA expression may enable new therapeutic interventions that modulate miRNA activities through NR-mediated signaling.
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Affiliation(s)
- Zhihong Yang
- Departments of Medicine and Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT 84132, USA.
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41
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Barrey E, Bonnamy B, Barrey EJ, Mata X, Chaffaux S, Guerin G. Muscular microRNA expressions in healthy and myopathic horses suffering from polysaccharide storage myopathy or recurrent exertional rhabdomyolysis. Equine Vet J 2011:303-10. [PMID: 21059022 DOI: 10.1111/j.2042-3306.2010.00267.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
REASONS FOR PERFORMING STUDY MicroRNAs (miRNA) are small endogenous noncoding interfering RNA molecules (18-25 nucleotides) regarded as major regulators in eukaryotic gene expression. They play a role in developmental timing, cellular differentiation, signalling and apoptosis pathways. Because of the central function of miRNAs in the proliferation and differentiation of the myoblasts demonstrated in mouse and man, it is assumed that they could be present in equine muscles and their expression profile may be related to the muscle status. OBJECTIVE To identify miRNA candidates in the muscles of control and affected horses suffering from polysaccharide storage myopathy (PSSM) and recurrent exertional rhabdomyolysis (RER). METHODS Muscle biopsies were collected in the gluteus medius of horses allocated into 4 groups: French Trotters (3 control-TF vs. 3 RER-TF) and Norman Cob (5 control-Cob vs. 9 PSSM-Cob). Blood samples were collected for miRNA analysis. Total RNA were extracted and real time quantitative RT-QPCR analysis were conducted using 10 miRNA assays (mir-1-23-30-133-181-188-195-206-339-375). RESULTS All the miRNA candidates were significantly detected in the muscles and some in blood samples. Variance analysis revealed highly significant (P < 0.0001) effects of the miRNA type, breed and pathology on the miRNA expression. A specific miRNA profile was related to each myopathy: a higher expression of mir-1, 133, 23a, 30b, 195 and 339 in RER-TF vs. control-TF (P < 0.05); a higher expression of mir-195 in PSSM-Cob vs. control-Cob (P < 0.05). The miRNA profile was different between breeds for mir-181, 188 and 206 (P < 0.05). The mir-1, 133, 181, 195 and 206 were detected in blood of control-Cob and PSSM-Cob horses. CONCLUSIONS This first study about muscular miRNA profile in equine myopathies indicated that it is possible to discriminate pathological from control horses according to their miRNA profile. The RER miRNA profile was more specific and contrasted than the PSSM profile.
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Affiliation(s)
- E Barrey
- Unité de Biologie Intégrative des Adaptations à l'Exercice, INSERM 902, Genopole Evry, France.
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42
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Eichner LJ, Giguère V. Estrogen related receptors (ERRs): a new dawn in transcriptional control of mitochondrial gene networks. Mitochondrion 2011; 11:544-52. [PMID: 21497207 DOI: 10.1016/j.mito.2011.03.121] [Citation(s) in RCA: 134] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Revised: 02/07/2011] [Accepted: 03/23/2011] [Indexed: 01/12/2023]
Abstract
Mitochondrial dysfunction contributes to the etiology of numerous diseases. Consequently, improving our knowledge of how to modulate mitochondrial activity is of considerable interest. One means to achieve this goal would be to control in a global and comprehensive manner the expression of most if not all nuclear encoded mitochondrial genes. The advent of genome-wide location analysis of transcription factor occupancy coupled with functional studies in cell and animal models has recently shown that three transcription factors possess this unique attribute. Unexpectedly, these factors are orphan members of the superfamily of nuclear receptors known as estrogen-related receptors (ERRs) α, β and γ. In this review, we will integrate current knowledge gathered through several functional and physiological genomic studies to provide persuasive evidence that the ERRs are indeed master regulators of mitochondrial biogenesis and function.
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Affiliation(s)
- Lillian J Eichner
- Goodman Cancer Research Centre, McGill University, Montréal, QC, Canada H3A 1A3
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43
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Zhang Y, Wang L. Nuclear receptor SHP inhibition of Dnmt1 expression via ERRγ. FEBS Lett 2011; 585:1269-75. [PMID: 21459093 DOI: 10.1016/j.febslet.2011.03.059] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2011] [Revised: 03/07/2011] [Accepted: 03/20/2011] [Indexed: 11/30/2022]
Abstract
We describe a transcriptional mechanism regulating the expression of Dnmt1 by nuclear receptors. We show that ERRγ functions as a transcriptional activator of mouse and human Dnmt1 expression by direct binding to its response elements (ERE1/ERE2) in the dnmt1/DNMT1 promoters. The induction of Dnmt1 by ERRγ is repressed by SHP through SHP inhibition of ERRγ transactivity, diminishing ERRγ recruitment to the Dnmt1 promoter, and altering the conformation of local chromatin from an active mode by ERRγ to an inactive mode. Our study provides the first evidence for nuclear receptor mediated regulation of Dnmt1 expression through ERRγ and SHP crosstalk.
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Affiliation(s)
- Yuxia Zhang
- Departments of Medicine and Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT 84132, United States
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44
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Galardi S, Mercatelli N, Farace MG, Ciafrè SA. NF-kB and c-Jun induce the expression of the oncogenic miR-221 and miR-222 in prostate carcinoma and glioblastoma cells. Nucleic Acids Res 2011; 39:3892-902. [PMID: 21245048 PMCID: PMC3089483 DOI: 10.1093/nar/gkr006] [Citation(s) in RCA: 149] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
MicroRNAs (miRNAs) are potent negative regulators of gene expression involved in all aspects of cell biology. They finely modulate virtually all physiological pathways in metazoans, and are deeply implicated in all main pathologies, among which cancer. Mir-221 and miR-222, two closely related miRNAs encoded in cluster from a genomic region on chromosome X, are strongly upregulated in several forms of human tumours. In this work, we report that the ectopic modulation of NF-kB modifies miR-221/222 expression in prostate carcinoma and glioblastoma cell lines, where we had previously shown their oncogenic activity. We identify two separate distal regions upstream of miR-221/222 promoter which are bound by the NF-kB subunit p65 and drive efficient transcription in luciferase reporter assays; consistently, the site-directed mutagenesis disrupting p65 binding sites or the ectopical inhibition of NF-kB activity significantly reduce luciferase activity. In the most distal enhancer region, we also define a binding site for c-Jun, and we show that the binding of this factor cooperates with that of p65, fully accounting for the observed upregulation of miR-221/222. Thus our work uncovers an additional mechanism through which NF-kB and c-Jun, two transcription factors deeply involved in cancer onset and progression, contribute to oncogenesis, by inducing miR-221/222 transcription.
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Affiliation(s)
- Silvia Galardi
- Department of Experimental Medicine and Biochemical Sciences, University of Rome 'Tor Vergata', 00133 Rome, Italy.
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45
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Zhang Y, Hagedorn CH, Wang L. Role of nuclear receptor SHP in metabolism and cancer. Biochim Biophys Acta Mol Basis Dis 2010; 1812:893-908. [PMID: 20970497 DOI: 10.1016/j.bbadis.2010.10.006] [Citation(s) in RCA: 185] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2010] [Revised: 10/12/2010] [Accepted: 10/14/2010] [Indexed: 02/07/2023]
Abstract
Small heterodimer partner (SHP, NR0B2) is a unique member of the nuclear receptor (NR) superfamily that contains the dimerization and ligand-binding domain found in other family members, but lacks the conserved DNA-binding domain. The ability of SHP to bind directly to multiple NRs is crucial for its physiological function as a transcriptional inhibitor of gene expression. A wide variety of interacting partners for SHP have been identified, indicating the potential for SHP to regulate an array of genes in different biological pathways. In this review, we summarize studies concerning the structure and target genes of SHP and discuss recent progress in understanding the function of SHP in bile acid, cholesterol, triglyceride, glucose, and drug metabolism. In addition, we review the regulatory role of SHP in microRNA (miRNA) regulation, liver fibrosis and cancer progression. The fact that SHP controls a complex set of genes in multiple metabolic pathways suggests the intriguing possibility of developing new therapeutics for metabolic diseases, including fatty liver, dyslipidemia and obesity, by regulating SHP with small molecules. To achieve this goal, more progress regarding SHP ligands and protein structure will be required. Besides its metabolic regulatory function, studies by us and other groups provide strong evidence that SHP plays a critical role in the development of cancer, particularly liver and breast cancer. An increased understanding of the fundamental mechanisms by which SHP regulates the development of cancers will be critical in applying knowledge of SHP in diagnostic, therapeutic or preventive strategies for specific cancers. This article is part of a Special Issue entitled: Translating nuclear receptors from health to disease.
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Affiliation(s)
- Yuxia Zhang
- Department of Medicine, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, UT 84132, USA
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46
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Zhou T, Zhang Y, Macchiarulo A, Yang Z, Cellanetti M, Coto E, Xu P, Pellicciari R, Wang L. Novel polymorphisms of nuclear receptor SHP associated with functional and structural changes. J Biol Chem 2010; 285:24871-81. [PMID: 20516075 PMCID: PMC2915723 DOI: 10.1074/jbc.m110.133280] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2010] [Revised: 05/12/2010] [Indexed: 11/06/2022] Open
Abstract
We identified three heterozygous nonsynonymous single nucleotide polymorphisms in the small heterodimer partner (SHP, NROB2) gene in normal subjects and CADASIL (cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy)-like patients, including two novel missense mutations (p.R38H, p.K170N) and one of the previously reported polymorphism (p.G171A). Four novel heterozygous mutations were also identified in the intron ((Intron)1265T-->A), 3'-untranslated region ((3'-UTR)101C-->G, (3'-UTR)186T-->C), and promoter ((Pro)-423C-->T) of the SHP gene. The exonic R38H and K170N mutants exhibited impaired nuclear translocation. K170N made SHP more susceptible to ubiquitination mediated degradation and blocked SHP acetylation, which displayed lost repressive activity on its interacting partners ERRgamma and HNF4alpha but not LRH-1. In contrast, G171A increased SHP mRNA and protein expression and maintained normal function. In general, the interaction of SHP mutants with LRH-1 and EID1 was enhanced. K170N also markedly impaired the recruitment of SHP, HNF4alpha, HDAC1, and HDAC3 to the apoCIII promoter. Molecular dynamics simulations of SHP showed that G171A stabilized the nuclear receptor boxes, whereas K170N promoted the conformational destabilization of all the structural elements of the receptor. This study suggests that genetic variations in SHP are common among human subjects and the Lys-170 residue plays a key role in controlling SHP ubiquitination and acetylation associated with SHP protein stability and repressive function.
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Affiliation(s)
- Taofeng Zhou
- From the Departments of Medicine and Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, Utah 84132
- The First Affiliated Hospital, Sun Yat-sen University of Medical Sciences, Guangzhou 510080, China
| | - Yuxia Zhang
- From the Departments of Medicine and Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, Utah 84132
| | - Antonio Macchiarulo
- the Dipartimento Chimica e Tecnologia del Farmaco, University of Perugia, Via del Liceo 1, 06123 Perugia, Italy, and
| | - Zhihong Yang
- From the Departments of Medicine and Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, Utah 84132
| | - Marco Cellanetti
- the Dipartimento Chimica e Tecnologia del Farmaco, University of Perugia, Via del Liceo 1, 06123 Perugia, Italy, and
| | - Eliecer Coto
- the Genetica Molecular, Hospital Central Asturias, 33006 Oviedo, Spain
| | - Pingyi Xu
- The First Affiliated Hospital, Sun Yat-sen University of Medical Sciences, Guangzhou 510080, China
| | - Roberto Pellicciari
- the Dipartimento Chimica e Tecnologia del Farmaco, University of Perugia, Via del Liceo 1, 06123 Perugia, Italy, and
| | - Li Wang
- From the Departments of Medicine and Oncological Sciences, Huntsman Cancer Institute, University of Utah School of Medicine, Salt Lake City, Utah 84132
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Zhang B, Li Q, Yin PH, Zhao CG, Li XQ, Gao H, Sun J, Fan ZZ. Involvement of miR-199a downregulation in the preventive effects of Jianpi Jiedu Recipe against experimental hepatocarcinoma in rats. Shijie Huaren Xiaohua Zazhi 2010; 18:125-131. [DOI: 10.11569/wcjd.v18.i2.125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the preventive effects of Jianpi Jiedu Recipe against diethylnitrosamine-induced hepatocarcinoma in rats and explore the involvement of miR-199a downregulation in this process.
METHODS: Male Wistar rats were randomly divided into three groups: normal control group (n = 25), model group (n = 40 ) and prevention group (n = 40). The normal control group was given normal saline [10 mL/(kg•d) ig] for 12 weeks, the model group was given diethylnitrosamine dissolved in drinking water (80 ppm) at a dose of 8 mg/(kg•d) for the same duration, and the prevention group was given both diethylnitrosamine at the same dose and Jianpi Jiedu Recipe [17.5 g/(kg•d), ig] for the same duration. Five rats in each group were executed at weeks 4, 8, 12 and 16, respectively, and the remaining rats were killed at week 20. Meanwhile, the mortality, incidence of ascites, and liver and spleen index were measured. Hematoxylin-eosin staining (HE) was used to examine hepatic pathological changes. The expression of miR-199a mRNA was detected by real-time reverse transcription-polymerase chain reaction (RT-PCR).
RESULTS: At week 20, the mortality rate and the incidence rate of ascites were 0% and 0% in the normal control group, 42.5% and 87.5% in the model group, and 17.5% and 44.4% in the prevention group, respectively. The mortality rate and the incidence of ascites were significantly lower in the prevention group than in the model group (both P < 0.05). At week 16, the incidence of HCC was 100% in both the model group and prevention group and 0% in the normal control group, the incidence of grade III liver cancer was 100% (5/5) in the model group, and the incidences of grade I, II and III liver cancer were 40% (2/5), 40% (2/5 ) and 20% (1/5) in the prevention group, respectively. Compared with the model group, the liver and spleen index in the prevention group were significantly reduced at all time points (all P < 0.01). Real-time RT-PCR results showed that the expression of miR-199a was significantly upregulated in the model group. However, miR-199a expression was significantly downregulated in the prevention group at all time points except at week 16 (all P < 0.01).
CONCLUSION: Jianpi Jiedu Recipe has good preventive effects against hepatocarcinoma in rats perhaps partly by downregulating miR-199a expression.
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