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Chen H, Yao J, Shan Z, Wei Y, You S, Li D, Zhang Y. To Assess the Role of microRNA-451 in the Progression and Metastasis of Colorectal Cancer. Appl Biochem Biotechnol 2024; 196:1044-1057. [PMID: 37318687 DOI: 10.1007/s12010-023-04538-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/11/2023] [Indexed: 06/16/2023]
Abstract
The study aimed to determine the expression of miR451 in colorectal cancer (CRC) subjects with CRC cells, and the role of miR451 in colorectal cancer cells. In October 2020, ATC purchased CRC and normal mucosal cell lines of CRC and implanted them in DMEM with 10% fetal serum. The suitability of the HT29 cell line is verified using the STR profile. In an incubator with 5% CO2, enlarged cells were placed at 37 °C. TCGA data was used to select the top 120 patients with a high voice and the lowest 120 patients with a low voice. Cells were collected and coated with Annexin V and PE according to the manufacturer's instructions after 24.0 h. After that, the cells were separated. Cells were also tested using flow cytometry. HCT-120 cells were transplanted into a concentration of 5×105/ml cells in 6-source plates. HCT120 cells in the experimental group were combined with miR451 mimics, miR451 inhibitors, or miR451 miR + SMAD4B for 12 h at 37 °C, and cells were collected 24 h later at 37 °C. The sample was injected with 5 ml of Annexin VFITC and PE. Compared with normal colorectal mucosal cells, CRC cell lines decreased miR451 expression levels (fetal human cells (FHC) and HCoEpiC). Then, the HCT120 cells were transfected with miR451 inhibitors, and 72 h after transfection, say of miR451 was normal. There was a significant decrease in cell function in the miR451mimic groups, but an increase when the miR451 was blocked. The proliferation of cancer cells was prevented and chemotherapy was effective when miR451 was overexpressed. The SMAD4 gene provides instructions for making a protein involved in transmitting chemical signals from the cell surface to the nucleus. The SMAD4B expression was tested by RT-qPCR and Western blotting after 72.0 h of transmission. The mRNA and protein expression of SMAD4B decreased significantly when miR451 was significantly higher than when inhibited, as revealed in the results of this study. Seventy-two hours after transplantation, mRNA levels and SMAD4B proteins were measured in HCT120 cells. In addition, the researchers in this study investigated whether miR451 was associated with SMAD4B-directed control of CRC growth and migration. It was found that SMAD4B is highly expressed in both CRC and para-cancer tissues while using the TCGA database to detect SMAD4B expression. Patients with CRC with SMAD4B have a severe prognosis. MiR451 is sensitive to depressive disorders by targeting SMAD4B, according to these studies. We found that miR451 inhibited cell growth and migration, made CRC cells more readily available in chemotherapy, and did so by targeting SMAD4B. The findings suggest that miR451 and its genetic predisposition, SMAD4B, may help predict the prognosis and course of cancer patients. Treatments that target the miR451/SMAD4B axis may be helpful to people with CRC.
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Affiliation(s)
- Hong Chen
- Department of General Surgery, Dushu Lake Hospital Affiliated to Soochow University, No 9 of Chongwen Road, Suzhou, Jiangsu Province, 215000, China
| | - Jun Yao
- Department of General Surgery, Dushu Lake Hospital Affiliated to Soochow University, No 9 of Chongwen Road, Suzhou, Jiangsu Province, 215000, China
| | - Zhili Shan
- Department of General Surgery, Dushu Lake Hospital Affiliated to Soochow University, No 9 of Chongwen Road, Suzhou, Jiangsu Province, 215000, China
| | - YiJun Wei
- Department of General Surgery, Dushu Lake Hospital Affiliated to Soochow University, No 9 of Chongwen Road, Suzhou, Jiangsu Province, 215000, China
| | - Shijie You
- Department of General Surgery, Dushu Lake Hospital Affiliated to Soochow University, No 9 of Chongwen Road, Suzhou, Jiangsu Province, 215000, China
| | - Dechun Li
- Department of General Surgery, Dushu Lake Hospital Affiliated to Soochow University, No 9 of Chongwen Road, Suzhou, Jiangsu Province, 215000, China
| | - Yi Zhang
- Department of General Surgery, Dushu Lake Hospital Affiliated to Soochow University, No 9 of Chongwen Road, Suzhou, Jiangsu Province, 215000, China.
- Department of General Surgery, The First Affiliated Hospital of Soochow University, No 899 of Pinghai Road, Suzhou, Jiangsu Province, 215000, China.
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Wang G, Song S, Shen WB, Reece EA, Yang P. MicroRNA-322 overexpression reduces neural tube defects in diabetic pregnancies. Am J Obstet Gynecol 2024; 230:254.e1-254.e13. [PMID: 37531989 PMCID: PMC10828117 DOI: 10.1016/j.ajog.2023.07.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 07/14/2023] [Accepted: 07/25/2023] [Indexed: 08/04/2023]
Abstract
BACKGROUND Hyperglycemia from pregestational diabetes mellitus induces neural tube defects in the developing fetus. Folate supplementation is the only effective way to prevent neural tube defects; however, some cases of neural tube defects are resistant to folate. Excess folate has been linked to higher maternal cancer risk and infant allergy. Therefore, additional interventions are needed. Understanding the mechanisms underlying maternal diabetes mellitus-induced neural tube defects can identify potential targets for preventing such defects. Despite not yet being in clinical use, growing evidence suggests that microRNAs are important intermediates in embryonic development and can serve as both biomarkers and drug targets for disease intervention. Our previous studies showed that maternal diabetes mellitus in vivo activates the inositol-requiring transmembrane kinase/endoribonuclease 1α (IRE1α) in the developing embryo and that a high glucose condition in vitro reduces microRNA-322 (miR-322) levels. IRE1α is an RNA endonuclease; however, it is unknown whether IRE1α targets and degrades miR-322 specifically or whether miR-322 degradation leads to neural tube defects via apoptosis. We hypothesize that IRE1α can inhibit miR-322 in maternal diabetes mellitus-induced neural tube defects and that restoring miR-322 expression in developing neuroepithelium ameliorates neural tube defects. OBJECTIVE This study aimed to identify potential targets for preventing maternal diabetes mellitus-induced neural tube defects and to investigate the roles and relationship of a microRNA and an RNA endonuclease in mouse embryos exposed to maternal diabetes mellitus. STUDY DESIGN To determine whether miR-322 reduction is necessary for neural tube defect formation in pregnancies complicated by diabetes mellitus, male mice carrying a transgene expressing miR-322 were mated with nondiabetic or diabetic wide-type female mice to generate embryos with or without miR-322 overexpression. At embryonic day 8.5 when the neural tube is not yet closed, embryos were harvested for the assessment of 3 miR-322 transcripts (primary, precursor, and mature miR-322), tumor necrosis factor receptor-associated factor 3 (TRAF3), and neuroepithelium cell survival. Neural tube defect incidences were determined in embryonic day 10.5 embryos when the neural tube should be closed if there is no neural tube defect formation. To identify which miR-322 transcript is affected by maternal diabetes mellitus and high glucose conditions, 3 miR-322 transcripts were assessed in embryos from dams with or without diabetes mellitus and in C17.2 mouse neural stem cells treated with different concentrations of glucose and at different time points. To determine whether the endonuclease IRE1α targets miR-322, small interfering RNA knockdown of IRE1α or overexpression of inositol-requiring transmembrane kinase/endoribonuclease 1α by DNA plasmid transfection was used to determine the effect of IRE1α deficiency or overexpression on miR-322 expression. RNA immunoprecipitation was performed to reveal the direct targets of inositol-requiring transmembrane kinase/endoribonuclease 1α. RESULTS Maternal diabetes mellitus suppressed miR-322 expression in the developing neuroepithelium. Restoring miR-322 expression in the neuroepithelium blocked maternal diabetes mellitus-induced caspase-3 and caspase-8 cleavage and cell apoptosis, leading to a neural tube defect reduction. Reversal of maternal diabetes mellitus-inhibited miR-322 via transgenic overexpression prevented TRAF3 up-regulation in embryos exposed to maternal diabetes mellitus. Activated IRE1α acted as an endonuclease and degraded precursor miR-322, resulting in mature miR-322 reduction. CONCLUSION This study supports the crucial role of the IRE1α-microRNA-TRAF3 circuit in the induction of neuroepithelial cell apoptosis and neural tube defect formation in pregnancies complicated by diabetes mellitus and identifies IRE1α and miR-322 as potential targets for preventing maternal diabetes mellitus-induced neural tube defects.
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Affiliation(s)
- Guanglei Wang
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD
| | - Shicong Song
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD
| | - Wei-Bin Shen
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD
| | - E Albert Reece
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD; Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD
| | - Peixin Yang
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD; Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD.
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Huang W, Yuan Z, Gu H. Exploring epigenomic mechanisms of neural tube defects using multi-omics methods and data. Ann N Y Acad Sci 2022; 1515:50-60. [PMID: 35666948 DOI: 10.1111/nyas.14802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Neural tube defects (NTDs) are a heterogeneous set of malformations attributed to disruption in normal neural tube closure during early embryogenesis. An in-depth understanding of NTD etiology and mechanisms remains elusive, however. Among the proposed mechanisms, epigenetic changes are thought to play an important role in the formation of NTDs. Epigenomics covers a wide spectrum of genomic DNA sequence modifications that can be investigated via high-throughput techniques. Recent advances in epigenomic technologies have enabled epigenetic studies of congenital malformations and facilitated the integration of big data into the understanding of NTDs. Herein, we review clinical epigenomic data that focuses on DNA methylation, histone modification, and miRNA alterations in human neural tissues, placental tissues, and leukocytes to explore potential mechanisms by which candidate genes affect human NTD pathogenesis. We discuss the links between epigenomics and gene regulatory mechanisms, and the effects of epigenetic alterations in human tissues on neural tube closure.
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Affiliation(s)
- Wanqi Huang
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, China
| | - Zhengwei Yuan
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, China
| | - Hui Gu
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, China
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Kaushik P, Kumar A. Emerging role and function of miR-198 in human health and diseases. Pathol Res Pract 2021; 229:153741. [PMID: 34952425 DOI: 10.1016/j.prp.2021.153741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 12/09/2021] [Accepted: 12/16/2021] [Indexed: 01/10/2023]
Abstract
Ever since their discovery, microRNAs (miRNAs/miRs) have astonished us by the plethora of processes they regulate, and thus adding another dimension to the gene regulation. They have been implicated in several diseases affecting cardiovascular, neurodegenerative, hepatic, autoimmune and inflammatory functions. A primate specific exonic miRNA, miR-198 has been vastly studied during the past decade, and shown to have a critical role in wound healing. The aberrant expression of miR-198 was first reported in schizophrenia, linking it to neural development. Later, its dysregulation and tumor suppressive role was reported in hepatocellular carcinoma. However, this was just a beginning, and after which there was an explosion of reports linking miR-198 deregulation to cancers and other ailments. The first target to be identified for miR-198 was Cyclin T1 in monocytes affecting HIV1 replication. Depending on the type of cancer, miR-198 has been shown to function either as a tumor suppressor or an oncomir. Interestingly, miR-198 is not only known to regulate multiple targets and pathways, but also is itself regulated by several circular RNAs and long-non-coding RNAs, highlighting a complex regulatory network. This review highlights the currently understood mechanism and regulation of miR-198 in different diseases, and its possible diagnostic and therapeutic potential.
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Affiliation(s)
- Pankhuri Kaushik
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore 560012, India
| | - Arun Kumar
- Department of Molecular Reproduction, Development and Genetics, Indian Institute of Science, Bangalore 560012, India.
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Wu C, Liu X, Li B, Sun G, Peng C, Xiang D. miR‑451 suppresses the malignant characteristics of colorectal cancer via targeting SAMD4B. Mol Med Rep 2021; 24:557. [PMID: 34109425 PMCID: PMC8188639 DOI: 10.3892/mmr.2021.12196] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 03/23/2021] [Indexed: 02/07/2023] Open
Abstract
Cancer metastasis and recurrence are major causes of poor survival in patients with colorectal cancer (CRC). Therefore, the biological behavior of microRNA (miR)‑451 in CRC deserves further investigation. Reverse transcription‑quantitative PCR was applied to measure the relative expression of miR‑451 in blood serum specimens from patients with CRC and CRC cells. In vitro, HCT116 cells were transfected with miR‑451 mimics, a miR‑451 inhibitor, or SAMD4B plasmids. Proliferation, migration and apoptosis were measured using CCK‑8, Transwell assays and flow cytometry, respectively. Luciferase reporter assay was used to identify targets of miR‑451 and western blotting performed to explore the internal mechanisms of miR‑451 regulation. In vivo, the effect of miR‑451 and SAMD4B plasmids on tumor growth was analyzed using a nude mouse xenograft model. Results indicated that serum miR‑451 expression was lower in patients with CRC compared with healthy controls. Patients with elevated expression of miR‑451 had longer survival times compared with those with low expression. Overexpression of miR‑451 inhibited proliferation and migration, promoted apoptosis and enhanced the sensitivity of CRC cells to chemotherapy. SAMD4B was identified as a direct target of miR‑451 using miRNA target prediction programs and dual luciferase reporter assay validated the binding site of miR‑451 in the 3‑'UTR region of SAMD4B. Further studies confirmed that miR‑451 inhibited CRC progression via targeting SAMD4B. Results indicated that miR‑451 is essential for blocking tumor growth via targeting SAMD4B in vivo and in vitro. The miR‑451/SAMD4B axis may serve as a novel therapeutic target in patients with CRC.
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Affiliation(s)
- Chunrong Wu
- Department of Oncology, Jiangjin Central Hospital of Chongqing, Chongqing 402260, P.R. China
| | - Xiaohu Liu
- Department of Gastrointestinal Surgery, Jiangjin Central Hospital of Chongqing, Chongqing 402260, P.R. China
| | - Bo Li
- Department of Cardiology, Jiangjin Central Hospital of Chongqing, Chongqing 402260, P.R. China
| | - Guiyin Sun
- Department of Oncology, Jiangjin Central Hospital of Chongqing, Chongqing 402260, P.R. China
| | - Chunfang Peng
- Department of Oncology, Jiangjin Central Hospital of Chongqing, Chongqing 402260, P.R. China
| | - Debing Xiang
- Department of Oncology, Jiangjin Central Hospital of Chongqing, Chongqing 402260, P.R. China
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Wang R, Han ZJ, Song G, Cui Y, Xia HF, Ma X. Homocysteine-induced neural tube defects in chick embryos via oxidative stress and DNA methylation associated transcriptional down-regulation of miR-124. Toxicol Res (Camb) 2021; 10:425-435. [PMID: 34141156 DOI: 10.1093/toxres/tfab020] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 01/09/2021] [Accepted: 02/09/2021] [Indexed: 11/12/2022] Open
Abstract
Although moderate homocysteine (HCY) elevation is associated with neural tube defects (NTDs), the underlying mechanisms have not been elucidated. In this study, we aimed to investigate that whether HCY-induced NTDs were associated with oxidative stress and methyl metabolism in chick embryos. The potential role of miR-124 in neurogenesis was also investigated. In this study, increased intracellular oxidative species and alterations in DNA methylation were observed following HCY treatment. This alteration coincided with decreases of Mn superoxide dismutase and glutathione peroxidase activities, as well as the expression of anti-rabbit DNA methyltransferase (DNMT) 1 and 3a. In addition, HCY induced significant decreases of S-adenosylmethionine (SAM)/S-adenosylhomocysteine (SAH) (P < 0.05). N-acetyl-L-cysteine and choline ameliorated global DNA hypomethylation induced by HCY. MiR-124 levels were significantly suppressed by HCY (P < 0.05), while elevated by 5-aza-2'-deoxycytidine (5-aza-dC). MiR-124 knockdown resulted in spina bifida occulta. Our research suggests that HCY-induced NTDs were associated with oxidative stress and methyl metabolism in chick embryos. MiR-124 down-regulation may occur via epigenetic mechanisms and contribute to HCY-induced NTDs in chick embryo models.
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Affiliation(s)
- Rui Wang
- Department of Blood Transfusion, First Medical Center, Chinese People's Liberation Army General Hospital, Beijing 100853, China.,Department of Genetics, National Research Institute for Family Planning, Beijing 100081, China
| | - Zhong-Ji Han
- Graduate School of Peking Union Medical College, Beijing 100730, China.,Department of Genetics, National Research Institute for Family Planning, Beijing 100081, China
| | - Ge Song
- Graduate School of Peking Union Medical College, Beijing 100730, China.,Department of Genetics, National Research Institute for Family Planning, Beijing 100081, China
| | - Yi Cui
- Graduate School of Peking Union Medical College, Beijing 100730, China.,Department of Genetics, National Research Institute for Family Planning, Beijing 100081, China
| | - Hong-Fei Xia
- Graduate School of Peking Union Medical College, Beijing 100730, China.,Department of Genetics, National Research Institute for Family Planning, Beijing 100081, China
| | - Xu Ma
- Graduate School of Peking Union Medical College, Beijing 100730, China.,Department of Genetics, National Research Institute for Family Planning, Beijing 100081, China
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Abstract
The role of extracellular vesicles (EVs) in the central nervous system, and in particular the brain, is a rapidly growing research area. Importantly, the role for EVs in the nervous system spans from early development through to old age, with EVs being associated with several different neurological disorders. To date, researchers have been studying the function of EVs in the nervous system in three major areas: (i) the role of EVs in promoting disease pathways, (ii) the ability of EVs to be used as a diagnostic tool to identify cellular changes in the nervous system, and (iii) the potential use of EVs as therapeutic tools for the delivery of biomolecules or drugs to the nervous system. In each of these settings the analysis and use of EVs performs a different function, highlighting the breadth of areas in which the EV field is applicable. A key aspect of EV biology is the ability of vesicles to cross biological barriers, in particular the blood brain barrier. This allows for the measurement of serum EVs that contain information about cells in the brain, or alternatively, allows for the delivery of biomolecules that are packaged within EVs for therapeutic use.
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Affiliation(s)
- Alex Mazurskyy
- Swinburne University of Technology, Hawthorn, VIC, Australia
| | - Jason Howitt
- Swinburne University of Technology, Hawthorn, VIC, Australia. .,Florey Institute of Neuroscience and Mental Health, Parkville, Australia.
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Mukhopadhyay P, Greene RM, Pisano MM. MicroRNA targeting of the non-canonical planar cell polarity pathway in the developing neural tube. Cell Biochem Funct 2020; 38:905-920. [PMID: 32129905 DOI: 10.1002/cbf.3512] [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: 01/23/2020] [Accepted: 01/28/2020] [Indexed: 11/05/2022]
Abstract
MicroRNAs (miRNAs) provide context-dependent transcriptional regulation of genes comprising signalling networks throughout the developing organism including morphogenesis of the embryonic neural tube (NT). Using a high-sensitivity, high-coverage microarray analysis platform, miRNA expression in the murine embryonic NT during the critical stages of its formation was examined. Analysis of a number of differentially expressed (DE) miRNAs enabled identification of several gene targets associated with cellular processes essential for normal NT development. Using computational pathway analysis, interactive biologic networks and functional relationships connecting DE miRNAs with their targeted messenger RNAs (mRNAs) were identified. Potential mRNA targets and a key signal transduction pathway governing critical cellular processes indispensable for normal mammalian neurulation were also identified. RNA preparations were also used to hybridize both miRNA arrays and mRNA arrays allowing miRNA-mRNA target analysis using data of DE miRNAs and DE mRNAs - co-expressed in the same developing NT tissue samples. Identification of these miRNA targets provides key insight into the epigenetic regulation of NT development as well as into potential mechanistic underpinning of NT defects. SIGNIFICANCE OF THE STUDY: This study underscores the premise that microRNAs are potential coordinators of normal neural tube (NT) formation, via regulation of the crucial, planar cell polarity pathway. Any alteration in their expression during neurulation would result in abnormal NT development.
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Affiliation(s)
- Partha Mukhopadhyay
- Division of Craniofacial Development and Anomalies, Department of Oral Immunology and Infectious Diseases, School of Dentistry, University of Louisville, Louisville, Kentucky, USA
| | - Robert M Greene
- Division of Craniofacial Development and Anomalies, Department of Oral Immunology and Infectious Diseases, School of Dentistry, University of Louisville, Louisville, Kentucky, USA
| | - M Michele Pisano
- Division of Craniofacial Development and Anomalies, Department of Oral Immunology and Infectious Diseases, School of Dentistry, University of Louisville, Louisville, Kentucky, USA
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Munteanu O, Cîrstoiu MM, Filipoiu FM, Neamţu MN, Stavarache I, Georgescu TA, Bratu OG, Iorgulescu G, Bohîlţea RE. The etiopathogenic and morphological spectrum of anencephaly: a comprehensive review of literature. ROMANIAN JOURNAL OF MORPHOLOGY AND EMBRYOLOGY 2020; 61:335-343. [PMID: 33544785 PMCID: PMC7864317 DOI: 10.47162/rjme.61.2.03] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Anencephaly is a severe malformation of the central nervous system (CNS), being one of the most common types of neural tube defects. It is defined as total or partial absence of the calvarium, with absence of the brain. Anencephaly has an incidence of 1 to 5 in every 1000 births, and the mortality rate is 100% during intrauterine life or within hours or days after birth. The etiology of anencephaly remains unclear, but various maternal-related environmental and genetic risk factors have been reported, which include diabetes, obesity, exposure to different drugs or toxins, genetic polymorphisms and mutations, as well as positive family history for neural tube defects. One of the most important nutritional factors in the development of anencephaly is folate deficiency. Methylenetetrahydrofolate reductase (MTHFR) gene codes the enzyme involved in the intracellular metabolism of folic acid; the 677C-T polymorphism of this gene causes the thermolability of the enzyme and decreased enzymatic activity, which is also dependent of folate plasmatic level. Etiopathogenesis of anencephaly includes several mutations in various other genes, such as: platelet-derived growth factor receptor alpha (PDGFRA), cadherin epidermal growth factor (EGF) laminin G (LAG) seven-pass G-type receptor 1 (CELSR1), Vang-like 1 (VANGL1) and Vang-like 2 (VANGL2), the last two being involved in the process of neurulation. Screening tests include maternal serum alpha-fetoprotein level and ultrasound (US) examination. During the first trimester US screening, anencephaly is now detected in all cases, but in order to decrease the complication rate of pregnancy termination, the diagnosis should be established as soon as possible, during the pregnancy confirmation US. We conclude that given that anencephaly is a severe malformation of the CNS, morphological characterization could improve the screening by US that is mandatory in the first trimester in order to plan the best, safe and early management.
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Affiliation(s)
- Octavian Munteanu
- Department of Pathology, Polizu Clinical Hospital, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania; ; Department of Behavioral Sciences, Carol Davila University of Medicine and Pharmacy Bucharest, Romania;
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Wang SS, Fang YY, Huang JC, Liang YY, Guo YN, Pan LJ, Chen G. Clinical value of microRNA-198-5p downregulation in lung adenocarcinoma and its potential pathways. Oncol Lett 2019; 18:2939-2954. [PMID: 31402959 PMCID: PMC6676716 DOI: 10.3892/ol.2019.10610] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Accepted: 06/13/2019] [Indexed: 12/13/2022] Open
Abstract
Lung adenocarcinoma (LUAD), the main subtype of non-small cell lung cancer, is known to be regulated by various microRNAs (miRs/miRNAs); however, the role of miR-198-5p in LUAD has not been clarified. In the present study, the clinical value of miR-198-5p in LUAD and its potential molecular mechanism was evaluated. miR-198-5p expression was examined by reverse transcription-quantitative PCR (RT-qPCR) in 101 paired LUAD and adjacent normal lung tissues. Subsequently, the miR-198-5p expression level was determined from microarray data from the Gene Expression Omnibus, ArrayExpress and by meta-analyses. Furthermore, the target mRNAs of miR-198-5p from 12 miRNA-mRNA predictive tools were intersected with The Cancer Genome Atlas (TCGA)-based differentially expressed genes. In addition, Gene Ontology annotation and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis were conducted to determine the possible mechanism of miR-198-5p in LUAD. The Search Tool for the Retrieval of Interacting Genes/Proteins database was employed to construct a protein-protein interaction network among the potential target genes of miR-198-5p. The results showed that miR-198-5p expression was lower in LUAD tissues than in adjacent non-cancerous lung tissues (4.469±2.495 vs. 5.301±2.502; P=0.015). Meta-analyses, including the data from the present study and online microarray data, also verified the downregulation of miR-198-5p in 584 cases of LUAD. The expression of miR-198-5p was associated with the age, blood vessel invasion, Tumor-Node-Metastasis stage, and lymph node metastasis of patients with LUAD and served as an independent prognostic factor for survival. The hub genes of miR-198-5p were upregulated in LUAD, according to TCGA and The Human Protein Atlas. For the KEGG pathway analysis, the most enriched KEGG pathway was the p53 signaling pathway (P=1.42×10−6). These findings indicated that the downregulation of miR-198-5p may play a pivotal role in the development of LUAD by targeting various signaling pathways.
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Affiliation(s)
- Shi-Shuo Wang
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
| | - Ye-Ying Fang
- Department of Radiation Oncology, The First Affiliated Hospital of Guangxi Medical University, Radiation Oncology Clinical Medical Research Center of Guangxi, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
| | - Jia-Cheng Huang
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
| | - Yue-Ya Liang
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
| | - Yi-Nan Guo
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
| | - Lin-Jiang Pan
- Department of Radiation Oncology, The First Affiliated Hospital of Guangxi Medical University, Radiation Oncology Clinical Medical Research Center of Guangxi, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
| | - Gang Chen
- Department of Pathology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi Zhuang Autonomous Region 530021, P.R. China
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11
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Mukhopadhyay P, Seelan RS, Greene RM, Pisano MM. Impact of prenatal arsenate exposure on gene expression in a pure population of migratory cranial neural crest cells. Reprod Toxicol 2019; 86:76-85. [PMID: 30953684 DOI: 10.1016/j.reprotox.2019.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 03/29/2019] [Accepted: 04/02/2019] [Indexed: 11/27/2022]
Abstract
Prenatal exposure to arsenic, a naturally occurring toxic element, causes neural tube defects (NTDs) and, in animal models, orofacial anomalies. Since aberrant development or migration of cranial neural crest cells (CNCCs) can also cause similar anomalies within developing embryos, we examined the effects of in utero exposure to sodium arsenate on gene expression patterns in pure populations of CNCCs, isolated by fluorescence activated cell sorting (FACS), from Cre/LoxP reporter mice. Changes in gene expression were analyzed using Affymetrix GeneChip® microarrays and expression of selected genes was verified by TaqMan quantitative real-time PCR. We report, for the first time, arsenate-induced alterations in the expression of a number of novel candidate genes and canonical cascades that may contribute to the pathogenesis of orofacial defects. Ingenuity Pathway and NIH-DAVID analyses revealed cellular response pathways, biological themes, and potential upstream regulators, that may underlie altered fetal programming of arsenate exposed CNCCs.
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Affiliation(s)
- Partha Mukhopadhyay
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development and Anomalies, ULSD, University of Louisville, Louisville, KY 40202, United States
| | - Ratnam S Seelan
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development and Anomalies, ULSD, University of Louisville, Louisville, KY 40202, United States
| | - Robert M Greene
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development and Anomalies, ULSD, University of Louisville, Louisville, KY 40202, United States.
| | - M Michele Pisano
- Department of Oral Immunology and Infectious Diseases, Division of Craniofacial Development and Anomalies, ULSD, University of Louisville, Louisville, KY 40202, United States
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12
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Liang YY, Huang JC, Tang RX, Chen WJ, Chen P, Cen WL, Shi K, Gao L, Gao X, Liu AG, Peng XT, Chen G, Huang SN, Fang YY, Gu YY. Clinical value of miR-198-5p in lung squamous cell carcinoma assessed using microarray and RT-qPCR. World J Surg Oncol 2018; 16:22. [PMID: 29394946 PMCID: PMC5797354 DOI: 10.1186/s12957-018-1320-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Accepted: 01/16/2018] [Indexed: 12/20/2022] Open
Abstract
Background To examine the clinical value of miR-198-5p in lung squamous cell carcinoma (LUSC). Methods Gene Expression Omnibus (GEO) microarray datasets were used to explore the miR-198-5p expression and its diagnostic value in LUSC. Real-time reverse transcription quantitative polymerase chain reaction was used to evaluate the expression of miR-198-5p in 23 formalin-fixed, paraffin-embedded (FFPE) LUSC tissues and corresponding non-cancerous tissues. The correlation between miR-198-5p expression and clinic pathological features was assessed. Meanwhile, putative target messenger RNAs of miR-198-5p were identified based on the analysis of differentially expressed genes in the Cancer Genome Atlas (TCGA) and 12 miRNA prediction tools. Subsequently, the putative target genes were sent to Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analyses. Results MiR-198-5p was low expressed in LUSC tissues. The combined standard mean difference (SMD) values of miR-198-5p expression based on GEO datasets were − 0.30 (95% confidence interval (CI) − 0.54, − 0.06) and − 0.39 (95% CI − 0.83, 0.05) using fixed effect model and random effect model, respectively. The sensitivity and specificity were not sufficiently high, as the area under the curve (AUC) was 0.7749 (Q* = 0.7143) based on summarized receiver operating characteristic (SROC) curves constructed using GEO datasets. Based on the in-house RT-qPCR, miR-198-5p expression was 4.3826 ± 1.7660 in LUSC tissues and 4.4522 ± 1.8263 in adjacent normal tissues (P = 0.885). The expression of miR-198-5p was significantly higher in patients with early TNM stages (I-II) than that in cases with advanced TNM stages (III-IV) (5.4400 ± 1.5277 vs 3.5690 ± 1.5228, P = 0.008). Continuous variable-based meta-analysis of GEO and PCR data displayed the SMD values of − 0.26 (95% CI − 0.48, − 0.04) and − 0.34 (95% CI − 0.71, 0.04) based on fixed and random effect models, respectively. As for the diagnostic value of miR-198-5p, the AUC based on the SROC curve using GEO and PCR data was 0.7351 (Q* = 0.6812). In total, 542 genes were identified as the targets of miR-198-5p. The most enriched Gene Ontology terms were epidermis development among biological processes, cell junction among cellular components, and protein dimerization activity among molecule functions. The pathway of non-small cell lung cancer was the most significant pathway identified using Kyoto Encyclopedia of Genes and Genomes analysis. Conclusion The expression of miR-198-5p is related to the TNM stage. Thus, miR-198-5p might play an important role via its target genes in LUSC.
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Affiliation(s)
- Yue-Ya Liang
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Jia-Cheng Huang
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Rui-Xue Tang
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Wen-Jie Chen
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Peng Chen
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Wei-Luan Cen
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Ke Shi
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Li Gao
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Xiang Gao
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - An-Gui Liu
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Xiao-Tong Peng
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Gang Chen
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Su-Ning Huang
- Department of Radiotherapy, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China
| | - Ye-Ying Fang
- Department of Radiotherapy, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China.
| | - Yong-Yao Gu
- Department of Pathology, First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, People's Republic of China.
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Qian Y, Song J, Ouyang Y, Han Q, Chen W, Zhao X, Xie Y, Chen Y, Yuan W, Fan C. Advances in Roles of miR-132 in the Nervous System. Front Pharmacol 2017; 8:770. [PMID: 29118714 PMCID: PMC5660991 DOI: 10.3389/fphar.2017.00770] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 10/12/2017] [Indexed: 12/24/2022] Open
Abstract
miR-132 is an endogenous small RNA and controls post-transcriptional regulation of gene expression via controlled degradation of mRNA or transcription inhibition. In the nervous system, miR-132 is significant for regulating neuronal differentiation, maturation and functioning, and widely participates in axon growth, neural migration, and plasticity. The miR-132 is affected by factors like mRNA expression, functional redundancy, and signaling cascades. It targets multiple downstream molecules to influence physiological and pathological neuronal activities. MiR-132 can influence the pathogenesis of many diseases, especially in the nervous system. The dysregulation of miR-132 results in the occurrence and exacerbation of neural developmental, degenerative diseases, like Alzheimer’s disease, Parkinson’s disease and epilepsy, neural infection and psychiatric disorders including disturbance of consciousness, cognition and memory, depression and schizophrenia. Regulation of miR-132 expression relieves symptoms, alleviates severity and finally effects a cure. This review aims to discuss the clinical potentials of miR-132 in the nervous system.
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Affiliation(s)
- Yun Qian
- Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Shanghai Sixth People's Hospital East Campus, Shanghai University of Medicine and Health, Shanghai, China
| | - Jialin Song
- Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Shanghai Sixth People's Hospital East Campus, Shanghai University of Medicine and Health, Shanghai, China
| | - Yuanming Ouyang
- Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Shanghai Sixth People's Hospital East Campus, Shanghai University of Medicine and Health, Shanghai, China
| | - Qixin Han
- Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Wei Chen
- Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Shanghai Sixth People's Hospital East Campus, Shanghai University of Medicine and Health, Shanghai, China
| | - Xiaotian Zhao
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
| | - Yangmei Xie
- Department of Neurology, Jinshan Hospital, Fudan University, Shanghai, China
| | - Yinghui Chen
- Department of Neurology, Jinshan Hospital, Fudan University, Shanghai, China
| | - Weien Yuan
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
| | - Cunyi Fan
- Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
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Wang L, Shangguan S, Xin Y, Chang S, Wang Z, Lu X, Wu L, Niu B, Zhang T. Folate deficiency disturbs hsa-let-7 g level through methylation regulation in neural tube defects. J Cell Mol Med 2017. [PMID: 28631291 PMCID: PMC5706510 DOI: 10.1111/jcmm.13228] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Folic acid deficiency during pregnancy is believed to be a high‐risk factor for neural tube defects (NTDs). Disturbed epigenetic modifications, including miRNA regulation, have been linked to the pathogenesis of NTDs in those with folate deficiency. However, the mechanism by which folic acid‐regulated miRNA influences this pathogenesis remains unclear. It is believed that DNA methylation is associated with dysregulated miRNA expression. To clarify this issue, here we measured the methylation changes of 22 miRNAs in 57 human NTD cases to explore whether such changes are involved in miRNA regulation in NTD cases through folate metabolism. In total, eight of the 22 miRNAs tested reduced their methylation modifications in NTD cases, which provide direct evidence of the roles of interactions between DNA methylation and miRNA level in these defects. Among the findings, there was a significant association between folic acid concentration and hsa‐let‐7 g methylation level in NTD cases. Hypomethylation of hsa‐let‐7 g increased its own expression level in both NTD cases and cell models, which indicated that hsa‐let‐7 g methylation directly regulates its own expression. Overexpression of hsa‐let‐7 g, along with its target genes, disturbed the migration and proliferation of SK‐N‐SH cells, implying that hsa‐let‐7 g plays important roles in the prevention of NTDs by folic acid. In summary, our data suggest a relationship between aberrant methylation of hsa‐let‐7 g and disturbed folate metabolism in NTDs, implying that improvements in nutrition during early pregnancy may prevent such defects, possibly via the donation of methyl groups for miRNAs.
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Affiliation(s)
- Li Wang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Shaofang Shangguan
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Yu Xin
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Shaoyan Chang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Zhen Wang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Xiaolin Lu
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Lihua Wu
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Bo Niu
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
| | - Ting Zhang
- Beijing Municipal Key Laboratory of Child Development and Nutriomics, Capital Institute of Pediatrics, Beijing, China
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15
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Huang WT, Wang HL, Yang H, Ren FH, Luo YH, Huang CQ, Liang YY, Liang HW, Chen G, Dang YW. Lower expressed miR-198 and its potential targets in hepatocellular carcinoma: a clinicopathological and in silico study. Onco Targets Ther 2016; 9:5163-80. [PMID: 27578984 PMCID: PMC5001667 DOI: 10.2147/ott.s108828] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Purpose To investigate the clinicopathological value and potential roles of microRNA-198 (miR-198) in hepatocellular carcinoma (HCC). Methods Ninety-five formalin-fixed paraffin-embedded HCC and the para-cancerous liver tissues were gathered. Real-time reverse transcription quantitative polymerase chain reaction was applied to determine the miR-198 expression. The association between the miR-198 expression and clinicopathological features was examined. Meanwhile, potential target messenger RNAs of miR-198 in HCC were obtained from 14 miRNA prediction databases and natural language processing method, in which we pooled the genes related to the tumorigenesis and progression of HCC and classified them by their frequency. The selected target genes were finally analyzed in the Gene Ontology analysis and Kyoto Encyclopedia of Genes and Genomes pathway. Results miR-198 expression was significantly lower in HCC than that in adjacent noncancerous liver tissues (1.30±0.72 vs 2.01±0.58, P<0.001). Low miR-198 expression was also correlated to hepatitis C virus infection (r=−0.48, P<0.001), tumor capsular infiltration (r=−0.43, P<0.001), metastasis (r=−0.26, P<0.010), number of tumor nodes (r=−0.25, P=0.013), vaso-invasion (r=−0.24, P=0.017), and clinical tumor node metastasis stage (r=−0.23, P=0.024). Altogether, 1,048 genes were achieved by the concurrent prediction from at least four databases and natural language processing indicated 1,800 genes for HCC. Further, 127 overlapping targets were further proceeded with for pathway analysis. The most enriched Gene Ontology terms in the potential target messenger RNAs of miR-198 were cell motion, cell migration, cell motility, and regulation of cell proliferation in biological process; organelle lumen, membrane-enclosed lumen, and nuclear lumen in cellular component; and enzyme binding, protein domain-specific binding, and protein kinase activity in molecular function. Kyoto Encyclopedia of Genes and Genomes analysis showed that these target genes were obviously involved in focal adhesion and pathways in cancer. Conclusion Lower expression of miR-198 was related to several clinicopathological parameters in HCC patients. miR-198 might play a regulatory role through its target genes in the development of HCC.
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Affiliation(s)
| | | | - Hong Yang
- Department of Ultrasonography, First Affiliated Hospital of Guangxi Medical University, Nanning, People's Republic of China
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16
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Increased miR-132-3p expression is associated with chronic neuropathic pain. Exp Neurol 2016; 283:276-86. [PMID: 27349406 DOI: 10.1016/j.expneurol.2016.06.025] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 06/21/2016] [Accepted: 06/22/2016] [Indexed: 12/30/2022]
Abstract
Alterations in the neuro-immune balance play a major role in the pathophysiology of chronic neuropathic pain. MicroRNAs (miRNA) can regulate both immune and neuronal processes and may function as master switches in chronic pain development and maintenance. We set out to analyze the role of miR-132-3p, first in patients with peripheral neuropathies and second in an animal model of neuropathic pain. We initially determined miR-132-3p expression by measuring its levels in white blood cells (WBC) of 30 patients and 30 healthy controls and next in sural nerve biopsies of 81 patients with painful or painless inflammatory or non-inflammatory neuropathies based on clinical diagnosis. We found a 2.6 fold increase in miR-132-3p expression in WBC of neuropathy patients compared to healthy controls (p<0.001). MiR-132-3p expression was also slightly up-regulated in sural nerve biopsies from neuropathy patients suffering from neuropathic pain compared to those without pain (1.2 fold; p<0.001). These promising findings were investigated further in an animal model of neuropathic pain, the spared nerve injury model (SNI). For this purpose miR-132-3p expression levels were measured in dorsal root ganglia and spinal cord of rats. Subsequently, miR-132-3p expression was pharmacologically modulated with miRNA antagonists or mimetics, and evoked pain and pain aversion were assessed. Spinal miR-132-3p levels were highest 10days after SNI, a time when persistent allodynia was established (p<0.05). Spinal administration of miR-132-3p antagonists via intrathecal (i.t.) catheters dose dependently reversed mechanical allodyina (p<0.001) and eliminated pain behavior in the place escape avoidance paradigm (p<0.001). Intrathecal administration of miR-132-3p mimetic dose-dependently induced pain behavior in naïve rats (p<0.001). Taken together these results indicate a pro-nociceptive effect of miR-132-3p in chronic neuropathic pain.
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17
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Harrison EB, Hochfelder CG, Lamberty BG, Meays BM, Morsey BM, Kelso ML, Fox HS, Yelamanchili SV. Traumatic brain injury increases levels of miR-21 in extracellular vesicles: implications for neuroinflammation. FEBS Open Bio 2016; 6:835-46. [PMID: 27516962 PMCID: PMC4971839 DOI: 10.1002/2211-5463.12092] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 05/19/2016] [Accepted: 05/26/2016] [Indexed: 01/05/2023] Open
Abstract
Traumatic brain injury (TBI) is an important health concern and effective treatment strategies remain elusive. Understanding the complex multicellular response to TBI may provide new avenues for intervention. In the context of TBI, cell–cell communication is critical. One relatively unexplored form of cell–cell communication in TBI is extracellular vesicles (EVs). These membrane‐bound vesicles can carry many different types of cargo between cells. Recently, miRNA in EVs have been shown to mediate neuroinflammation and neuronal injury. To explore the role of EV‐associated miRNA in TBI, we isolated EVs from the brain of injured mice and controls, purified RNA from brain EVs, and performed miRNA sequencing. We found that the expression of miR‐212 decreased, while miR‐21, miR‐146, miR‐7a, and miR‐7b were significantly increased with injury, with miR‐21 showing the largest change between conditions. The expression of miR‐21 in the brain was primarily localized to neurons near the lesion site. Interestingly, adjacent to these miR‐21‐expressing neurons were activated microglia. The concurrent increase in miR‐21 in EVs with the elevation of miR‐21 in neurons, suggests that miR‐21 is secreted from neurons as potential EV cargo. Thus, this study reveals a new potential mechanism of cell–cell communication not previously described in TBI.
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Affiliation(s)
- Emily B Harrison
- Department of Pharmacology and Experimental Neuroscience University of Nebraska Medical Center Omaha NE USA
| | - Colleen G Hochfelder
- Department of Pharmacology and Experimental Neuroscience University of Nebraska Medical Center Omaha NE USA; Present address: Albert Einstein College of Medicine 1300 Morris Park Ave Bronx NY 10461 USA
| | - Benjamin G Lamberty
- Department of Pharmacology and Experimental Neuroscience University of Nebraska Medical Center Omaha NE USA
| | - Brittney M Meays
- Department of Pharmacology and Experimental Neuroscience University of Nebraska Medical Center Omaha NE USA
| | - Brenda M Morsey
- Department of Pharmacology and Experimental Neuroscience University of Nebraska Medical Center Omaha NE USA
| | - Matthew L Kelso
- Department of Cellular and Integrative Physiology University of Nebraska Medical Center Omaha NE USA; Present address: Medpace Reference Laboratories 5365 Medpace Way Cincinnati OH USA
| | - Howard S Fox
- Department of Pharmacology and Experimental Neuroscience University of Nebraska Medical Center Omaha NE USA
| | - Sowmya V Yelamanchili
- Department of Pharmacology and Experimental Neuroscience University of Nebraska Medical Center Omaha NE USA
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18
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Duan J, Zhou K, Tang X, Duan J, Zhao L. MicroRNA-34a inhibits cell proliferation and induces cell apoptosis of glioma cells via targeting of Bcl-2. Mol Med Rep 2016; 14:432-8. [PMID: 27176117 DOI: 10.3892/mmr.2016.5255] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 03/30/2016] [Indexed: 11/05/2022] Open
Abstract
Glioblastoma is a highly malignant brain tumor, characterized by the poor prognosis and high recurrence rates. Despite therapeutic strategies including surgery, radiotherapy and chemotherapy, the median survival of patients is only 14.6 months. MicroRNAs (miRNAs) have been considered as a novel type of gene regulator. Previous studies have demonstrated that the expression of miRNA‑34a (miR‑34a) is significantly associated with the grade and prognosis of glioma. However, the exact function of miR‑34a on glioma progression and underlying mechanisms remain to be elucidated. The present study investigated the function of miR‑34a in U87 human glioma cells by exogenously transfecting cells with an miR‑34a mimic. Overexpression of miR‑34a inhibited proliferation, and induced apoptosis of U87 cells. The current study also demonstrated that B‑cell lymphoma 2 (Bcl‑2) was the target gene of miR‑34a, as demonstrated by luciferase assays. Furthermore, restoring the expression of Bcl‑2 was indicated to partially block the miR‑34a‑induced apoptosis. Thus, data from the present study identified miR‑34a as a tumor suppressor in glioma by, at least partially, targeting Bcl‑2. This may provide future novel diagnostic and therapeutic strategies for human glioma.
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Affiliation(s)
- Junwei Duan
- Department of Neurosurgery, The Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Kejun Zhou
- Department of Pediatric Surgery, The Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Xiaoping Tang
- Department of Neurosurgery, The Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Jie Duan
- Department of Neurosurgery, The Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
| | - Long Zhao
- Department of Neurosurgery, The Affiliated Hospital of North Sichuan Medical College, Nanchong, Sichuan 637000, P.R. China
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19
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Qin P, Li L, Zhang D, Liu QL, Chen XR, Yang HY, Fan YZ, Wang JX. Altered microRNA expression profiles in a rat model of spina bifida. Neural Regen Res 2016; 11:502-7. [PMID: 27127493 PMCID: PMC4829019 DOI: 10.4103/1673-5374.179070] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
MicroRNAs (miRNAs) are dynamically regulated during neurodevelopment, yet few reports have examined their role in spina bifida. In this study, we used an established fetal rat model of spina bifida induced by intragastrically administering olive oil-containing all-trans retinoic acid to dams on day 10 of pregnancy. Dams that received intragastric administration of all-trans retinoic acid-free olive oil served as controls. The miRNA expression profile in the amniotic fluid of rats at 20 days of pregnancy was analyzed using an miRNA microarray assay. Compared with that in control fetuses, the expression of miRNA-9, miRNA-124a, and miRNA-138 was significantly decreased (> 2-fold), whereas the expression of miRNA-134 was significantly increased (> 4-fold) in the amniotic fluid of rats with fetuses modeling spina bifida. These results were validated using real-time quantitative reverse-transcription polymerase chain reaction. Hierarchical clustering analysis of the microarray data showed that these differentially expressed miRNAs could distinguish fetuses modeling spina bifida from control fetuses. Our bioinformatics analysis suggested that these differentially expressed miRNAs were associated with many cytological pathways, including a nervous system development signaling pathway. These findings indicate that further studies are warranted examining the role of miRNAs through their regulation of a variety of cell functional pathways in the pathogenesis of spina bifida. Such studies may provide novel targets for the early diagnosis and treatment of spina bifida.
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Affiliation(s)
- Pan Qin
- Department of Pediatric Surgery, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Lin Li
- Department of Dermatology, Zhengzhou Children's Hospital, Zhengzhou, Henan Province, China
| | - Da Zhang
- Department of Pediatric Surgery, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Qiu-Liang Liu
- Department of Pediatric Surgery, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Xin-Rang Chen
- Department of Pediatric Surgery, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - He-Ying Yang
- Department of Pediatric Surgery, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Ying-Zhong Fan
- Department of Pediatric Surgery, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
| | - Jia-Xiang Wang
- Department of Pediatric Surgery, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China
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20
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Nawaratna SSK, Gobert GN, Willis C, Mulvenna J, Hofmann A, McManus DP, Jones MK. Lysosome-associated membrane glycoprotein (LAMP)--preliminary study on a hidden antigen target for vaccination against schistosomiasis. Sci Rep 2015; 5:15069. [PMID: 26472258 PMCID: PMC4607944 DOI: 10.1038/srep15069] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 08/13/2015] [Indexed: 12/12/2022] Open
Abstract
Our previously reported gene atlasing of schistosome tissues revealed transcripts that were highly enriched in the digestive tract of Schistosoma mansoni. From these, we selected two candidates, Sm-LAMP and Sm-NPC2 for testing as vaccine targets. The two molecules were selected on the basis of relatively high expression in the gastrodermis, their potentially important biological function, divergence from homologous molecules of the host and possible apical membrane expression in the gastrodermis. Bacterially expressed recombinant peptides corresponding to regions excluding trans-membrane domains of the selected vaccine targets were used in blinded vaccine trials in CBA mice using alum-CpG as adjuvant. Vaccine trials using the recombinant insoluble Sm-LAMP protein showed 16-25% significant reduction in total worm burden. Faecal egg count reduction was 52% and 60% in two trials, respectively, with similar results for the solubly expressed protein. Liver egg burden was reduced significantly (20% and 38%) with an insoluble recombinant Sm-LAMP in two trials, but not with the soluble recombinant form. Parasite fecundity was not affected by either Sm-LAMP protein preparations in the trials. It is concluded that Sm-LAMP may provide limited protection towards S. mansoni infections but could be used in combination with other vaccine candidates, to provide more comprehensive protection.
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Affiliation(s)
- Sujeevi S. K. Nawaratna
- School of Veterinary Sciences, The University of Queensland, Gatton Campus, Gatton Qld, 4343, Australia
- QIMR Berghofer Medical Research Institute, 300 Herston Road, Herston, Qld, 4006, Australia
| | - Geoffrey N. Gobert
- QIMR Berghofer Medical Research Institute, 300 Herston Road, Herston, Qld, 4006, Australia
| | - Charlene Willis
- QIMR Berghofer Medical Research Institute, 300 Herston Road, Herston, Qld, 4006, Australia
| | - Jason Mulvenna
- QIMR Berghofer Medical Research Institute, 300 Herston Road, Herston, Qld, 4006, Australia
| | - Andreas Hofmann
- Structural Chemistry Program, Eskitis Institute, Griffith University, Brisbane, Qld 4111, Australia
- Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Donald P. McManus
- QIMR Berghofer Medical Research Institute, 300 Herston Road, Herston, Qld, 4006, Australia
| | - Malcolm K. Jones
- School of Veterinary Sciences, The University of Queensland, Gatton Campus, Gatton Qld, 4343, Australia
- QIMR Berghofer Medical Research Institute, 300 Herston Road, Herston, Qld, 4006, Australia
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21
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Xiu Y, Liu Z, Xia S, Jin C, Yin H, Zhao W, Wu Q. MicroRNA-137 upregulation increases bladder cancer cell proliferation and invasion by targeting PAQR3. PLoS One 2014; 9:e109734. [PMID: 25330156 PMCID: PMC4199610 DOI: 10.1371/journal.pone.0109734] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 09/08/2014] [Indexed: 12/19/2022] Open
Abstract
There is increasing evidence suggesting that dysregulation of some microRNAs (miRNAs) may contribute to tumor progression and metastasis and have been proposed to be key regulators of diverse biological processes such as transcriptional regulation, cell growth and tumorigenesis. Previous studies have shown that miR-137 is dysregulated in some malignancies, but its role in bladder cancer is still unknown. In our study, we find that miR-137 is up-regulated in human bladder cancer tissues and cell lines. Moreover, the higher level of miR-137 was associated with pM or pTNM stage in clinical bladder cancer patients. Enforced expression of miR-137 in bladder cancer cells significantly enhanced their proliferation, migration and invasion. Bioinformatics analysis identified the tumor suppressor gene PAQR3 as a potential miR-137 target gene. Further studies indicated that miR-137 suppressed the expression of PAQR3 by binding to its 3′-untranslated region. Silencing of PAQR3 by small interfering RNAs phenocopied the effects of miR-137 overexpression, whereas restoration of PAQR3 in bladder cancer cells bladder cancer cells overexpressing miR-137, partially reversed the suppressive effects of miR-137. These findings indicate that miR-137 could be a potential oncogene in bladder cancer.
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Affiliation(s)
- Youcheng Xiu
- School of Life Science and Biotechnology, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Zan Liu
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Shunyao Xia
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Chengjun Jin
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Huaifu Yin
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Weiming Zhao
- Department of Urology, The First Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Qiong Wu
- School of Life Science and Biotechnology, State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, China
- * E-mail:
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Wang M, Wang J, Kong X, Chen H, Wang Y, Qin M, Lin Y, Chen H, Xu J, Hong J, Chen YX, Zou W, Fang JY. MiR-198 represses tumor growth and metastasis in colorectal cancer by targeting fucosyl transferase 8. Sci Rep 2014; 4:6145. [PMID: 25174450 PMCID: PMC5385833 DOI: 10.1038/srep06145] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 07/31/2014] [Indexed: 12/11/2022] Open
Abstract
In this study we investigated the biological role and mechanism of miR-198 in colorectal carcinoma (CRC). MiR-198 expression was shown to exhibit a strongly negative correlation with lymph node invasion, distant metastasis and patient survival in examinations of colorectal cancer tissues and paired normal colorectal mucosa tissues. fucosyl transferase 8 (FUT8) was identified as a potential target of miR-198 in bioinformatics analysis and luciferase reporter assays. Overexpression of miR-198 in CRC cell lines decreased FUT8 levels as shown by immunofluorescence analysis, and inhibited cell proliferation, migration, and invasion. These anti-tumor phenotypes were rescued by reconstitution of FUT8 expression. Furthermore, miR-198 was shown to target the 3′UTR of FUT8 directly to downregulate FUT8 expression at both mRNA and protein levels in qRT-PCR and Western blot analyses, respectively. In vivo, restoration of miR-198 significantly inhibited xenograft growth and invasion of CRC tumors in nude mice. Therefore, it could be concluded that miR-198 suppresses the proliferation and invasion of CRC by directly targeting FUT8.
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Affiliation(s)
- Minyu Wang
- 1] State Key Laboratory for Oncogene and Related Genes, Key Laboratory of Gastroenterology &Hepatology, Ministry of Health, Division of Gastroenterology and Hepatology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Cancer Institute, Shanghai Institute of Digestive Diseases, 145 Middle Shandong Road, Shanghai 200001, China [2]
| | - Jilin Wang
- 1] State Key Laboratory for Oncogene and Related Genes, Key Laboratory of Gastroenterology &Hepatology, Ministry of Health, Division of Gastroenterology and Hepatology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Cancer Institute, Shanghai Institute of Digestive Diseases, 145 Middle Shandong Road, Shanghai 200001, China [2]
| | - Xuan Kong
- State Key Laboratory for Oncogene and Related Genes, Key Laboratory of Gastroenterology &Hepatology, Ministry of Health, Division of Gastroenterology and Hepatology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Cancer Institute, Shanghai Institute of Digestive Diseases, 145 Middle Shandong Road, Shanghai 200001, China
| | - Huimin Chen
- State Key Laboratory for Oncogene and Related Genes, Key Laboratory of Gastroenterology &Hepatology, Ministry of Health, Division of Gastroenterology and Hepatology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Cancer Institute, Shanghai Institute of Digestive Diseases, 145 Middle Shandong Road, Shanghai 200001, China
| | - Yingchao Wang
- State Key Laboratory for Oncogene and Related Genes, Key Laboratory of Gastroenterology &Hepatology, Ministry of Health, Division of Gastroenterology and Hepatology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Cancer Institute, Shanghai Institute of Digestive Diseases, 145 Middle Shandong Road, Shanghai 200001, China
| | - Miao Qin
- State Key Laboratory for Oncogene and Related Genes, Key Laboratory of Gastroenterology &Hepatology, Ministry of Health, Division of Gastroenterology and Hepatology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Cancer Institute, Shanghai Institute of Digestive Diseases, 145 Middle Shandong Road, Shanghai 200001, China
| | - Yanwei Lin
- State Key Laboratory for Oncogene and Related Genes, Key Laboratory of Gastroenterology &Hepatology, Ministry of Health, Division of Gastroenterology and Hepatology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Cancer Institute, Shanghai Institute of Digestive Diseases, 145 Middle Shandong Road, Shanghai 200001, China
| | - Haoyan Chen
- State Key Laboratory for Oncogene and Related Genes, Key Laboratory of Gastroenterology &Hepatology, Ministry of Health, Division of Gastroenterology and Hepatology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Cancer Institute, Shanghai Institute of Digestive Diseases, 145 Middle Shandong Road, Shanghai 200001, China
| | - Jie Xu
- State Key Laboratory for Oncogene and Related Genes, Key Laboratory of Gastroenterology &Hepatology, Ministry of Health, Division of Gastroenterology and Hepatology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Cancer Institute, Shanghai Institute of Digestive Diseases, 145 Middle Shandong Road, Shanghai 200001, China
| | - Jie Hong
- State Key Laboratory for Oncogene and Related Genes, Key Laboratory of Gastroenterology &Hepatology, Ministry of Health, Division of Gastroenterology and Hepatology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Cancer Institute, Shanghai Institute of Digestive Diseases, 145 Middle Shandong Road, Shanghai 200001, China
| | - Ying-Xuan Chen
- State Key Laboratory for Oncogene and Related Genes, Key Laboratory of Gastroenterology &Hepatology, Ministry of Health, Division of Gastroenterology and Hepatology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Cancer Institute, Shanghai Institute of Digestive Diseases, 145 Middle Shandong Road, Shanghai 200001, China
| | - Weiping Zou
- Department of Surgery, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jing-Yuan Fang
- State Key Laboratory for Oncogene and Related Genes, Key Laboratory of Gastroenterology &Hepatology, Ministry of Health, Division of Gastroenterology and Hepatology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Cancer Institute, Shanghai Institute of Digestive Diseases, 145 Middle Shandong Road, Shanghai 200001, China
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Wang J, Wang X, Guan T, Xiang Q, Wang M, Zhang Z, Guan Z, Wang G, Zhu Z, Xie Q, Li G, Guo J, Wang F, Zhang Z, Niu B, Zhang T. Analyses of copy number variation reveal putative susceptibility loci in MTX-induced mouse neural tube defects. Dev Neurobiol 2014; 74:877-93. [DOI: 10.1002/dneu.22170] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 01/12/2014] [Accepted: 02/05/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Jianhua Wang
- Department of Biotechnology, Beijing Municipal Key Laboratory of Child Development and Nutriomics; Capital Institute of Pediatrics; Beijing 100020 China
| | - Xiuwei Wang
- Department of Biotechnology, Beijing Municipal Key Laboratory of Child Development and Nutriomics; Capital Institute of Pediatrics; Beijing 100020 China
| | - Tao Guan
- Department of Biochemistry and Molecular Biology; Shanxi Medical University; Taiyuan 030001 China
| | - Qian Xiang
- Department of Biomedical Engineering, Chinese Academy of Medical Sciences; Peking Union Medical College; Beijing 100730 China
| | - Mingsheng Wang
- Department of Biomedical Engineering, Chinese Academy of Medical Sciences; Peking Union Medical College; Beijing 100730 China
| | - Zhi Zhang
- Department of Biomedical Engineering, Chinese Academy of Medical Sciences; Peking Union Medical College; Beijing 100730 China
| | - Zhen Guan
- Department of Biotechnology, Beijing Municipal Key Laboratory of Child Development and Nutriomics; Capital Institute of Pediatrics; Beijing 100020 China
| | - Guoliang Wang
- Department of Biotechnology, Beijing Municipal Key Laboratory of Child Development and Nutriomics; Capital Institute of Pediatrics; Beijing 100020 China
| | - Zhiqiang Zhu
- Department of Biotechnology, Beijing Municipal Key Laboratory of Child Development and Nutriomics; Capital Institute of Pediatrics; Beijing 100020 China
| | - Qiu Xie
- Department of Biotechnology, Beijing Municipal Key Laboratory of Child Development and Nutriomics; Capital Institute of Pediatrics; Beijing 100020 China
| | - Guannan Li
- Department of Biotechnology, Beijing Municipal Key Laboratory of Child Development and Nutriomics; Capital Institute of Pediatrics; Beijing 100020 China
| | - Jin Guo
- Department of Biotechnology, Beijing Municipal Key Laboratory of Child Development and Nutriomics; Capital Institute of Pediatrics; Beijing 100020 China
| | - Fang Wang
- Department of Biotechnology, Beijing Municipal Key Laboratory of Child Development and Nutriomics; Capital Institute of Pediatrics; Beijing 100020 China
| | - Zhengguo Zhang
- Department of Biomedical Engineering, Chinese Academy of Medical Sciences; Peking Union Medical College; Beijing 100730 China
| | - Bo Niu
- Department of Biotechnology, Beijing Municipal Key Laboratory of Child Development and Nutriomics; Capital Institute of Pediatrics; Beijing 100020 China
- Department of Biochemistry and Molecular Biology; Shanxi Medical University; Taiyuan 030001 China
| | - Ting Zhang
- Department of Biotechnology, Beijing Municipal Key Laboratory of Child Development and Nutriomics; Capital Institute of Pediatrics; Beijing 100020 China
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Ogata K, Sumida K, Miyata K, Kushida M, Kuwamura M, Yamate J. Circulating miR-9* and miR-384-5p as potential indicators for trimethyltin-induced neurotoxicity. Toxicol Pathol 2014; 43:198-208. [PMID: 24777749 DOI: 10.1177/0192623314530533] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Circulating microRNAs (miRNAs) show promise as biomarkers due to their tissue-specific expression and high stability. This study was conducted to investigate whether nervous system-enriched miR-9* and hippocampus-enriched miR-384-5p could be indicators of neurotoxicity in serum. Rats were given a single administration of trimethyltin (TMT) chloride at 6, 9, or 12 mg/kg by gavage, and brain and serum were collected 1, 4, and 7 days after administration. MiR-9* and miR-384-5p levels in serum and hippocampus were analyzed by reverse transcriptase polymerase chain reaction (RT-PCR), and their neurotoxicity detection sensitivities were compared with nervous symptoms, auditory response, and histopathology. TMT caused tremor, hypersensitivity, and decreased auditory response at 12 mg/kg on day 1 and at 9 mg/kg on day 4. Histopathologically, neural cell death and glial reaction were observed in brain (mainly hippocampus) at 12 mg/kg on day 1, 4, and 7 and at 6 and 9 mg/kg on day 4 and 7. MiR-9* and miR-384-5p levels were elevated in serum at 9 and 12 mg/kg on days 4 and 7 (at 9 mg/kg on day 7, miR-9* only) but were not changed in hippocampus. These miRNAs were considered to be elevated with the evolution of neural cell death and were thus considered possible novel indicators of neurotoxicity.
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Affiliation(s)
- Keiko Ogata
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd., Osaka, Japan Laboratory of Veterinary Pathology, Division of Veterinary Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Kayo Sumida
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd., Osaka, Japan
| | - Kaori Miyata
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd., Osaka, Japan
| | - Masahiko Kushida
- Environmental Health Science Laboratory, Sumitomo Chemical Co., Ltd., Osaka, Japan
| | - Mitsuru Kuwamura
- Laboratory of Veterinary Pathology, Division of Veterinary Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
| | - Jyoji Yamate
- Laboratory of Veterinary Pathology, Division of Veterinary Sciences, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Osaka, Japan
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25
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Yu L, Liao Q, Chen X, Xu L, Zeng X, Lv Z, Sun X, Zhen H, Wu Z. Dynamic expression of miR-132, miR-212, and miR-146 in the brain of different hosts infected with Angiostrongylus cantonensis. Parasitol Res 2013; 113:91-9. [DOI: 10.1007/s00436-013-3630-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Accepted: 09/30/2013] [Indexed: 11/28/2022]
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26
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Wei X, Li H, Miao J, Liu B, Zhan Y, Wu D, Zhang Y, Wang L, Fan Y, Gu H, Wang W, Yuan Z. miR-9*- and miR-124a-Mediated switching of chromatin remodelling complexes is altered in rat spina bifida aperta. Neurochem Res 2013; 38:1605-15. [PMID: 23677776 DOI: 10.1007/s11064-013-1062-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 04/16/2013] [Accepted: 04/25/2013] [Indexed: 12/20/2022]
Abstract
Neural tube defects (NTDs) are complex congenital malformations resulting from incomplete neurulation. Our previous work has demonstrated that motor and sensory neurons develop defectively in rat embryos with spina bifida aperta. To identify whether neural development-associated miRNAs play a role in the neurological deficits of NTDs, we screened a panel of neural development-related miRNAs, including miR-9, miR-9*, miR-124a, miR-10a, miR10b, miR-34a, miR-221 and miR-222, in the spinal cords of rats with retinoic acid-induced spina bifida aperta. We discovered that the expression of miR-9, miR-9* and miR-124a was specifically down-regulated compared to spinal cords without spina bifida. To further clarify whether down-regulation of miR-9* and miR-124a contributes to the neurological deficits of NTDs, we investigated the levels of genes involved in switching in the subunit composition of Swi/Snf-like BAF (Brg/Brm associated factor) complexes modulated by miR-9* and miR-124a and neuronal differentiation. In addition to the down-regulation of miR-9* and miR-124a expression, we also observed increased expression of repressor element silencing transcription factor (REST) and BAF53a and decreased expression of BAF53b, Brg1 and NeuroD1. Our results suggest that REST-regulated miR-9*- and the miR-124a-mediated chromatin remodelling regulatory mechanism may participate in the neuronal deficits of spina bifida.
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Affiliation(s)
- Xiaowei Wei
- Key Laboratory of the Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, No. 36, Sanhao Street, Heping District, Shenyang, 110004, China
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27
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Lukiw WJ, Andreeva TV, Grigorenko AP, Rogaev EI. Studying micro RNA Function and Dysfunction in Alzheimer's Disease. Front Genet 2013; 3:327. [PMID: 23390425 PMCID: PMC3565163 DOI: 10.3389/fgene.2012.00327] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Accepted: 12/28/2012] [Indexed: 01/18/2023] Open
Abstract
Alzheimer’s disease (AD) is a tragic, progressive, age-related neurological dysfunction, representing one of the most prevalent neurodegenerative disorders in industrialized societies. Globally, 5 million new cases of AD are diagnosed annually, with one new AD case being reported every 7 s. Most recently there has been a surge in the study of the regulatory mechanisms of the AD process, and the particular significance of small non-coding ∼22 ribonucleotide RNAs called micro RNAs (miRNAs). Abundant data have profiled miRNA patterns in healthy, aging brain, in mild cognitive impairment (MCI), and in the moderate- and late-stages of AD. The major mode of action of miRNA is to interact, via base-pair complementarity, with ribonucleotides located within the 3′ untranslated region (3′-UTR) of multiple target messenger RNAs (mRNAs), and in doing so decrease the capability of that specific mRNA to be expressed. Many miRNAs are highly cell- and tissue-specific. The human brain appears to use only a highly specific fraction of all known human miRNAs, whose speciation and complexity are defined as a discrete subset of all known small non-coding RNAs (sncRNAs) in the brain. In general, in contrast to normally, aging human brain, in AD a family of pathogenically up-regulated miRNAs appear to be down-regulating the expression certain brain-essential mRNA targets, including key regulatory genes involved interactively in neuroinflammation, synaptogenesis, neurotrophic functions, and amyloidogenesis. These up-regulated, NF-kB-sensitive miRNAs, involved in the innate immune and inflammatory response and synaptic, neurotrophic, and amyloidogenic functions include miRNA-9, miRNA-125b, miRNA-146a, and miRNA-155. Other miRNAs of the miRNA-15/107 family, miRNA-153 and miRNA-190, and others, will be discussed. Overall, this manuscript will review the known contribution of miRNAs to aging brain function and the role they appear to play in the incidence and progression of AD.
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Affiliation(s)
- Walter J Lukiw
- Department of Neurology, LSU Neuroscience Center, Louisiana State University Health Sciences Center New Orleans, LA, USA ; Department of Ophthalmology, LSU Neuroscience Center, Louisiana State University Health Sciences Center New Orleans, LA, USA
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28
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Guo K, Yang Y, Qiu J, Kan Q, Zhou XG, Zhou XY. The expression profile of microRNAs in wistar rats with lipopolysaccharide-induced periventricular leukomalacia. J Mol Neurosci 2013; 51:941-9. [PMID: 23354881 DOI: 10.1007/s12031-013-9958-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Accepted: 01/09/2013] [Indexed: 10/27/2022]
Abstract
Over the recent decades, with numbers of premature infants being cured, clinical diseases on brain damage like periventricular leukomalacia (PVL) have become much more common. Meanwhile, since the discovery of first miRNA lin-4, an increasing number of important studies about this small RNA have been performed not only in the normal organ development but also in the pathogenic mechanism of diseases. However, throughout the past several years, there have been rare miRNA researches discussing the connection between the PVL and miRNA. In view of this situation, we constructed an animal model of PVL induced by lipopolysaccharide (LPS) and performed a miRNA microarray which was repeated three times to profile the expression of microRNAs (miRNAs) between two groups (PVL group versus control group). Then, miRNAs with notable fold changes (fold change >1.5) were found; some of them were further validated by real-time PCR. As a result, 104 differentially expressed miRNAs were identified using the microarray, including 64 upregulated and 40 downregulated miRNAs. Then, five miRNAs of them were selected, characterized by consistent trend in expression in all three microarrays. Among these five miRNAs (miRNA-451, miRNA-200b, miRNA-29a, miRNA-21, and miRNA-138), we subsequently selected miRNA-451 and miRNA-200b for real-time PCR because they possess the highest fold changes. Finally, the results of PCR are basically in accord with the microarray. We guess these new identified miRNAs may play an important role in the pathogenesis of PVL and may provide certain pathophysiological basis for the future research of related diseases in preterm infants.
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Affiliation(s)
- Kai Guo
- Institute of Pediatrics, Nanjing Medical University, Nanjing, 210029, China
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Kong S, Tao KX, Wang GB. Effect of miR-451-mediated regulation of MIF expression on cell proliferation in human colon carcinoma cell line LoVo. Shijie Huaren Xiaohua Zazhi 2012; 20:3452-3456. [DOI: 10.11569/wcjd.v20.i35.3452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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 effect of miR-451-mediated regulation of macrophage migration inhibitory factor (MIF) expression on cell proliferation in human colon carcinoma cell line LoVo.
METHODS: A lentiviral vector overexpressing hsa-mir-451a was designed and used to infect LoVo cells. Real-time quantitative PCR and Western blot were utilized to detect the expression levels of MIF mRNA and protein in LoVo cells and fetal colon cells. Cell proliferation was determined by MTT assay after infection.
RESULTS: The expression of MIF mRNA and protein decreased significantly and cell proliferation was significantly inhibited in LoVo cells infected with the lentiviral vector overexpressing hsa-mir-451a compared to non-infected LoVo cells and fetal colon cells.
CONCLUSION: MIF is a potential target gene of miR-451. Overexpression of miR-451 could suppress LoVo cell proliferation by down-regulating MIF expression.
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Mechanism of folate deficiency-induced apoptosis in mouse embryonic stem cells: Cell cycle arrest/apoptosis in G1/G0 mediated by microRNA-302a and tumor suppressor gene Lats2. Int J Biochem Cell Biol 2012; 44:1750-60. [PMID: 22828209 DOI: 10.1016/j.biocel.2012.07.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Revised: 07/09/2012] [Accepted: 07/16/2012] [Indexed: 11/19/2022]
Abstract
Deficiencies in maternal diet, such as inadequate intake of folate, can inhibit normal development and lead to developmental defects. MicroRNAs (miRNAs) may play a role in mediating the effects of folate deficiency in the growing mammalian embryo, although conclusive evidences to support that possibility are not yet available. The goal of the present study was to investigate whether and how folate deprivation alters the properties of mouse embryonic stem cells (mESCs) in culture. For this purpose, mESCs were cultured in folate-deficient or complete culture medium. The results show that folate-deficient mESCs have a significantly higher rate of apoptosis, accumulate in G0/G1 and fail to proliferate. Expression profiling revealed several miRs and many mRNAs are differently expressed in folate-deficient cells. RT-PCR data confirmed differential expressions of 12 miRNAs in folate-deficient cells. Furthermore, bioinformatics analyses and in vitro studies suggested that miR-302a plays a critical role in mediating the effects of folate on cell proliferation and cell cycle-specific apoptosis by targeting Lats2 gene. Together, these results suggest that the effects of folate deficiency on mammalian development may be mediated by miRNAs that regulate proliferation and/or cell cycle progression in ESCs.
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31
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Omran A, Elimam D, Shalaby S, Peng J, Yin F. MicroRNAs: A Light into the “Black Box” of Neuropediatric Diseases? Neuromolecular Med 2012; 14:244-61. [DOI: 10.1007/s12017-012-8193-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Accepted: 07/06/2012] [Indexed: 12/19/2022]
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32
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Krupp DR, Xu PT, Thomas S, Dellinger A, Etchevers HC, Vekemans M, Gilbert JR, Speer MC, Ashley-Koch AE, Gregory SG. Transcriptome profiling of genes involved in neural tube closure during human embryonic development using long serial analysis of gene expression (long-SAGE). ACTA ACUST UNITED AC 2012; 94:683-92. [PMID: 22806986 DOI: 10.1002/bdra.23040] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 05/01/2012] [Accepted: 05/04/2012] [Indexed: 12/14/2022]
Abstract
BACKGROUND Neural tube defects (NTDs) are common human birth defects with a complex etiology. To develop a comprehensive knowledge of the genes expressed during normal neurulation, we established transcriptomes from human neural tube fragments during and after neurulation using long Serial Analysis of Gene Expression (long-SAGE). METHODS Rostral and caudal neural tubes were dissected from normal human embryos aged between 26 and 32 days of gestation. Tissues from the same region and Carnegie stage were pooled (n ≥ 4) and total RNA extracted to construct four long-SAGE libraries. Tags were mapped using the UniGene Homo sapiens 17 bp tag-to-gene best mapping set. Differentially expressed genes were identified by chi-square or Fisher's exact test, and validation was performed for a subset of those transcripts using in situ hybridization. In silico analyses were performed with BinGO and EXPANDER. RESULTS We observed most genes to be similarly regulated in rostral and caudal regions, but expression profiles differed during and after closure. In silico analysis found similar enrichments in both regions for biologic process terms, transcription factor binding and miRNA target motifs. Twelve genes potentially expressing alternate isoforms by region or developmental stage, and the microRNAs miR-339-5p, miR-141/200a, miR-23ab, and miR-129/129-5p are among several potential candidates identified here for future research. CONCLUSIONS Time appears to influence gene expression in the developing central nervous system more than location. These data provide a novel complement to traditional strategies of identifying genes associated with human NTDs and offer unique insight into the genes associated with normal human neurulation.
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Affiliation(s)
- Deidre R Krupp
- Center for Human Genetics, Department of Medicine, Duke University Medical Center, Durham, North Carolina 27710, USA
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Gu H, Li H, Zhang L, Luan H, Huang T, Wang L, Fan Y, Zhang Y, Liu X, Wang W, Yuan Z. Diagnostic role of microRNA expression profile in the serum of pregnant women with fetuses with neural tube defects. J Neurochem 2012; 122:641-9. [PMID: 22642222 DOI: 10.1111/j.1471-4159.2012.07812.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The discovery of placental microRNAs (miRNAs) in maternal serum has opened up new possibilities for non-invasive prenatal diagnosis. However, the expression of miRNAs in the serum of pregnant women with fetuses with neural tube defects (NTDs) has not been characterized. In this article, we explored serum miRNAs as potential biomarkers in the serum of pregnant women with NTD fetuses. By using a miRNA microarray that covers 887 human miRNAs, we revealed 17 miRNAs with significant change in expression in serum of pregnant women with NTD fetuses and women with normal pregnancies. Quantitative reverse-transcription PCR (qRT-PCR) analysis validated that the expression for six miRNAs (miR-142-3p, miR-144, miR-720, miR-575, miR-765, and miR-1182) was up-regulated and that for miR-1275 was down-regulated. To determine whether these miRNAs were related to pregnancy, we compared the miRNA levels in pre- and post-delivery maternal serum samples. Six of these miRNAs were rapidly reduced in post-delivery serum (p < 0.05). Moreover, by receiver operating characteristic (ROC) curve analysis, the area under the ROC curve (AUC) of combining these six miRNAs was 0.803 (p < 0.001). Thus, we reveal six pregnancy-associated miRNAs that are deregulated in the serum of pregnant women with NTD fetuses and highlight the clinical potential of serum miRNAs as biomarkers for diagnosis and prognostication of fetal NTDs.
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Affiliation(s)
- Hui Gu
- Key Laboratory of Health Ministry for Congenital Malformation, Shengjing Hospital, China Medical University, Shenyang, China
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Wanet A, Tacheny A, Arnould T, Renard P. miR-212/132 expression and functions: within and beyond the neuronal compartment. Nucleic Acids Res 2012; 40:4742-53. [PMID: 22362752 PMCID: PMC3367188 DOI: 10.1093/nar/gks151] [Citation(s) in RCA: 258] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
During the last two decades, microRNAs (miRNAs) emerged as critical regulators of gene expression. By modulating the expression of numerous target mRNAs mainly at the post-transcriptional level, these small non-coding RNAs have been involved in most, if not all, biological processes as well as in the pathogenesis of a number of diseases. miR-132 and miR-212 are tandem miRNAs whose expression is necessary for the proper development, maturation and function of neurons and whose deregulation is associated with several neurological disorders, such as Alzheimer's disease and tauopathies (neurodegenerative diseases resulting from the pathological aggregation of tau protein in the human brain). Although their involvement in neuronal functions is the most described, evidences point towards a role of these miRNAs in many other biological processes, including inflammation and immune functions. Incidentally, miR-132 was recently classified as a ‘neurimmiR’, a class of miRNAs operating within and between the neural and immune compartments. In this review, we propose an outline of the current knowledge about miR-132 and miR-212 functions in neurons and immune cells, by describing the signalling pathways and transcription factors regulating their expression as well as their putative or demonstrated roles and validated mRNA targets.
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Affiliation(s)
- Anaïs Wanet
- Laboratory of Biochemistry and Cell Biology (URBC), Namur Research Institute for Life Sciences (NARILIS), University of Namur (FUNDP), 61 rue de Bruxelles, 5000 Namur, Belgium
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Lukiw WJ. NF-кB-regulated micro RNAs (miRNAs) in primary human brain cells. Exp Neurol 2011; 235:484-90. [PMID: 22138609 DOI: 10.1016/j.expneurol.2011.11.022] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2011] [Revised: 11/08/2011] [Accepted: 11/11/2011] [Indexed: 02/07/2023]
Abstract
Micro RNAs (miRNAs), small and labile ~22 nucleotide-sized fragments of single stranded RNA, are important regulators of messenger (mRNA) complexity and in shaping the transcriptome of a cell. In this communication, we utilized amyloid beta 42 (Aβ42) peptides and interleukin-1beta (IL-1β) as a combinatorial, physiologically-relevant stress to induce miRNAs in human primary neural (HNG) cells (a co-culture of neurons and astroglia). Specific miRNA up-regulation was monitored using miRNA arrays, Northern micro-dot blots and RT-PCR. Selective NF-кB translocation and DNA binding inhibitors, including the chelator and anti-oxidant pyrollidine dithiocarbamate (PDTC) and the polyphenolic resveratrol analog CAY10512 (trans-3,5,4'-trihydroxystilbene), indicated the NF-кB sensitivity of several brain miRNAs, including miRNA-9, miRNA-125b and miRNA-146a. The inducible miRNA-125b and miRNA-146a, and their verified mRNA targets, including 15-lipoxygenase (15-LOX), synapsin-2 (SYN-2), complement factor H (CFH) and tetraspanin-12 (TSPAN12), suggests complex and highly interactive roles for NF-кB, miRNA-125b and miRNA-146a. These data further indicate that just two NF-кB-mediated miRNAs have tremendous potential to contribute to the regulation of neurotrophic support, synaptogenesis, neuroinflammation, innate immune signaling and amyloidogenesis in stressed primary neural cells of the human brain.
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Abstract
Many studies have shown that microRNA expression in cancer may be regulated by epigenetic events. Recently, we found that in lung cancer miR-212 was strongly down-regulated. However, mechanisms involved in the regulation of miR-212 expression are unknown. Therefore, we addressed this point by investigating the molecular mechanisms of miR-212 silencing in lung cancer. We identified histone modifications rather than DNA hypermethylation as epigenetic events that regulate miR-212 levels in NSCLC. Moreover, we found that miR-212 silencing in vivo is closely associated with the severity of the disease.
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Qin X, Liu B, Li Y, You J, Zhou Q. [Screening and identification of microRNAs related to acquired gefitinib-resistance in lung adenocarcinoma cell lines]. ZHONGGUO FEI AI ZA ZHI = CHINESE JOURNAL OF LUNG CANCER 2011; 14:478-83. [PMID: 21645449 PMCID: PMC5999882 DOI: 10.3779/j.issn.1009-3419.2011.06.18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
背景与目的 肺腺癌吉非替尼获得性耐药严重影响了肺癌的治疗效果,microRNA在肺腺癌吉非替尼获得性耐药中的作用及其机制尚不清楚。本研究筛选与肺腺癌获得性吉非替尼耐药相关的microRNAs。 方法 以吉非替尼敏感肺癌细胞PC9与吉非替尼耐药肺癌细胞PC9/AB11为细胞模型,观察二者的形态学差异,流式细胞仪检测二者的细胞周期,计算它们的倍增时间,MTT法检测吉非替尼对两种细胞的IC50,应用microRNA芯片检测和筛选与吉非替尼耐药相关的microRNAs,并进行real-time PCR验证。 结果 PC9细胞与PC9/AB11细胞形态差异明显,在细胞周期、倍增时间和吉非替尼对其的IC50上均具有统计学差异。microRNA芯片结果显示,与PC9相比,耐药肺癌细胞株PC9/AB11中有4个microRNAs表达水平明显上调,有9个microRNAs表达水平明显下调。经real-time PCR验证,microRNA-138在PC9/AB11中表达明显下调,与芯片结果一致。 结论 PC9和PC9/AB11细胞株microRNA表达谱存在明显差异,初步筛选到了13个与肺腺癌吉非替尼耐药密切相关的microRNAs,为进一步深入研究microRNA在肺腺癌吉非替尼获得性耐药中的作用及其分子机制提供了实验依据和理论基础。
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Affiliation(s)
- Xuebo Qin
- Tianjin Key Labotatory of Lung Cancer Metastasis and Tumor Microenvironment, Tianjin Lung Cancer Institute, Tianjin Medical University General Hospital, Tianjin 300052, China
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Nawaratna SSK, McManus DP, Moertel L, Gobert GN, Jones MK. Gene Atlasing of digestive and reproductive tissues in Schistosoma mansoni. PLoS Negl Trop Dis 2011; 5:e1043. [PMID: 21541360 PMCID: PMC3082511 DOI: 10.1371/journal.pntd.0001043] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2010] [Accepted: 03/25/2011] [Indexed: 11/30/2022] Open
Abstract
Background While considerable genomic and transcriptomic data are available for
Schistosoma mansoni, many of its genes lack significant
annotation. A transcriptomic study of individual tissues and organs of
schistosomes could play an important role in functional annotation of the
unknown genes, particularly by providing rapid localisation data and thus
giving insight into the potential roles of these molecules in parasite
development, reproduction and homeostasis, and in the complex host-parasite
interaction. Methodology/Principal Findings Quantification of gene expression in tissues of S. mansoni
was achieved by a combination of laser microdissection microscopy (LMM) and
oligonucleotide microarray analysis. We compared the gene expression profile
of the adult female gastrodermis and male and female reproductive tissues
with whole worm controls. The results revealed a total of 393 genes
(contigs) that were up-regulated two-fold or more in the gastrodermis, 4,450
in the ovary, 384 in the vitelline tissues of female parasites, and 2,171 in
the testes. We have also supplemented these data with the identification of
highly expressed genes in different regions of manually dissected male and
female S. mansoni. Though relatively crude, this dissection
strategy provides low resolution localisation data for critical regions of
the adult parasites that are not amenable to LMM isolation. Conclusions This is the first detailed transcriptomic study of the reproductive tissues
and gastrodermis of S. mansoni. The results obtained will
help direct future research on the functional aspects of these tissues,
expediting the characterisation of currently unannotated gene products of
S. mansoni and the discovery of new drug and vaccine
targets. There is currently only one drug available for treatment of
schistosomiasis mansoni and no vaccine. The searches for
possible new drug and vaccine candidates remain two major areas of current
research in schistosomiasis. There are considerable amounts of data available on
the genomics, transcriptomics and proteomics of Schistosoma
mansoni from which useful candidates for future drug and vaccine
development can be identified. Arranging these data into a biologically relevant
context through the characterisation of gene expression profiles of the
different tissues of this complex metazoan parasite, is an essential step in
identifying molecules with potential therapeutic value. We have used laser
microdissection microscopy and microarray analysis to show that many
tissue-specific genes are up-regulated in the digestive and reproductive tissues
of S. mansoni. This new knowledge provides an avenue to
investigate the molecular components associated with fundamental aspects of
schistosome biology.
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Affiliation(s)
- Sujeevi S. K. Nawaratna
- Queensland Institute of Medical Research, Herston, Australia
- School of Veterinary Sciences, The University of Queensland, Gatton,
Australia
| | | | - Luke Moertel
- Queensland Institute of Medical Research, Herston, Australia
| | - Geoffrey N. Gobert
- Queensland Institute of Medical Research, Herston, Australia
- School of Veterinary Sciences, The University of Queensland, Gatton,
Australia
| | - Malcolm K. Jones
- Queensland Institute of Medical Research, Herston, Australia
- School of Veterinary Sciences, The University of Queensland, Gatton,
Australia
- * E-mail:
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Kisliouk T, Yosefi S, Meiri N. MiR-138 inhibits EZH2 methyltransferase expression and methylation of histone H3 at lysine 27, and affects thermotolerance acquisition. Eur J Neurosci 2010; 33:224-35. [DOI: 10.1111/j.1460-9568.2010.07493.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Pietrzykowski AZ. The role of microRNAs in drug addiction: a big lesson from tiny molecules. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2010; 91:1-24. [PMID: 20813238 DOI: 10.1016/s0074-7742(10)91001-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Alcoholism is a multifactorial disease of unclear molecular underpinnings. Currently, we are witnessing a major shift in our understanding of the functional elements of the genome, which could help us to discover novel insights into the nature of alcoholism. In humans, the vast majority of the genome encodes non-protein-coding DNA with unclear function. Recent research has started to unveil this mystery by describing the functional relevance of microRNAs, and examining which genes are regulated by non-protein-coding DNA. Here, I describe alcohol regulation of microRNAs and provide examples of microRNAs that control the expression of alcohol-relevant genes. Emphasis is put on the potential of microRNAs in explaining the polygenic nature of alcoholism and prospects of microRNA research and future directions of this burgeoning field.
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