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Chen K, Ding L, Shui H, Liang Y, Zhang X, Wang T, Li L, Liu S, Wu H. MiR-615 Agomir Encapsulated in Pluronic F-127 Alleviates Neuron Damage and Facilitates Function Recovery After Brachial Plexus Avulsion. J Mol Neurosci 2021; 72:136-148. [PMID: 34569008 PMCID: PMC8755699 DOI: 10.1007/s12031-021-01916-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 09/09/2021] [Indexed: 11/26/2022]
Abstract
Brachial plexus avulsion (BPA) is a devastating traumatic peripheral nerve injury complicated with paralysis of the upper extremity. We previously reported that leucine-rich repeat and immunoglobulin-like domain-containing NOGO receptor-interacting protein 1 (LINGO-1) has a potent role in inhibiting neuron survival and axonal regeneration after the central nervous system (CNS) damage and miR-615 is a potential microRNA (miRNA) negatively regulated LINGO-1. However, the effect of miR-615 in BPA remains to be elucidated. Accumulating evidence indicates that pluronic F-127 (PF-127) hydrogel could serve as a promising vehicle for miRNA encapsulation. Thus, to further explore the potential role of hydrogel-miR-615 in BPA-reimplantation, the present study established the BPA rat model and injected miR-615 agomir encapsulated by PF-127 hydrogel into the reimplantation site using a microsyringe. In this study, results indicated that hydrogel-miR-615 agomir effectively alleviated motoneuron loss by LINGO-1 inhibition, promoted musculocutaneous nerve regeneration and myelination, reduced astrocytes activation, promoted angiogenesis and attenuated peripheral amyotrophy, leading to improved motor functional rehabilitation of the upper extremity. In conclusion, our findings demonstrate that miR-615-loaded PF-127 hydrogel may represent a novel therapeutic strategy for BPA treatment.
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Affiliation(s)
- Kangzhen Chen
- Department of Anesthesiology, Guangzhou Huadu Affiliated Hospital of Guangdong Medical University (Guangzhou Huadu District Maternal and Child Health Care Hospital), Guangzhou, 510800, China
- Key Laboratory of Stem Cell and Regenerative Tissue Engineering, Guangdong Medical University, Dongguan, 523808, China
| | - Lu Ding
- Key Laboratory of Stem Cell and Regenerative Tissue Engineering, Guangdong Medical University, Dongguan, 523808, China
- Scientific Research Center, the Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, 518107, China
| | - Hua Shui
- Department of Anesthesiology, Guangzhou Huadu Affiliated Hospital of Guangdong Medical University (Guangzhou Huadu District Maternal and Child Health Care Hospital), Guangzhou, 510800, China
| | - Yinru Liang
- Key Laboratory of Stem Cell and Regenerative Tissue Engineering, Guangdong Medical University, Dongguan, 523808, China
| | - Xiaomin Zhang
- Key Laboratory of Stem Cell and Regenerative Tissue Engineering, Guangdong Medical University, Dongguan, 523808, China
| | - Tao Wang
- Department of Surgery, The Third Hospital of Guangdong Medical University (Longjiang Hospital of Shunde District), Foshan, 528318, China
| | - Linke Li
- Key Laboratory of Stem Cell and Regenerative Tissue Engineering, Guangdong Medical University, Dongguan, 523808, China
| | - Shuxian Liu
- Department of Anesthesiology, Guangzhou Huadu Affiliated Hospital of Guangdong Medical University (Guangzhou Huadu District Maternal and Child Health Care Hospital), Guangzhou, 510800, China.
| | - Hongfu Wu
- Key Laboratory of Stem Cell and Regenerative Tissue Engineering, Guangdong Medical University, Dongguan, 523808, China.
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Mona M, Kobeissy F, Park YJ, Miller R, Saleh W, Koh J, Yoo MJ, Chen S, Cha S. Secretome Analysis of Inductive Signals for BM-MSC Transdifferentiation into Salivary Gland Progenitors. Int J Mol Sci 2020; 21:E9055. [PMID: 33260559 PMCID: PMC7730006 DOI: 10.3390/ijms21239055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 02/06/2023] Open
Abstract
Severe dry mouth in patients with Sjögren's Syndrome, or radiation therapy for patients with head and neck cancer, significantly compromises their oral health and quality of life. The current clinical management of xerostomia is limited to palliative care as there are no clinically-proven treatments available. Previously, our studies demonstrated that mouse bone marrow-derived mesenchymal stem cells (mMSCs) can differentiate into salivary progenitors when co-cultured with primary salivary epithelial cells. Transcription factors that were upregulated in co-cultured mMSCs were identified concomitantly with morphological changes and the expression of acinar cell markers, such as α-amylase (AMY1), muscarinic-type-3-receptor(M3R), aquaporin-5(AQP5), and a ductal cell marker known as cytokeratin 19(CK19). In the present study, we further explored inductive molecules in the conditioned media that led to mMSC reprogramming by high-throughput liquid chromatography with tandem mass spectrometry and systems biology. Our approach identified ten differentially expressed proteins based on their putative roles in salivary gland embryogenesis and development. Additionally, systems biology analysis revealed six candidate proteins, namely insulin-like growth factor binding protein-7 (IGFBP7), cysteine-rich, angiogenetic inducer, 61(CYR61), agrin(AGRN), laminin, beta 2 (LAMB2), follistatin-like 1(FSTL1), and fibronectin 1(FN1), for their potential contribution to mMSC transdifferentiation during co-culture. To our knowledge, our study is the first in the field to identify soluble inductive molecules that drive mMSC into salivary progenitors, which crosses lineage boundaries.
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Affiliation(s)
- Mahmoud Mona
- Oral and Maxillofacial Diagnostic Sciences, University of Florida College of Dentistry, Gainesville, FL 32610, USA; (M.M.); (R.M.)
- Oral Biology, University of Florida College of Dentistry, Gainesville, FL 32610, USA
| | - Firas Kobeissy
- Department of Emergency Medicine, McKnight Brain Institute, University of Florida, Gainesville, FL 32610, USA;
| | - Yun-Jong Park
- Division of Viral Products, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, MD 20993, USA;
| | - Rehae Miller
- Oral and Maxillofacial Diagnostic Sciences, University of Florida College of Dentistry, Gainesville, FL 32610, USA; (M.M.); (R.M.)
| | - Wafaa Saleh
- Oral Medicine and Periodontology Department, Faculty of Dentistry, Mansoura University, Mansoura 35516, Egypt;
| | - Jin Koh
- Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, FL 32610, USA; (J.K.); (S.C.)
| | - Mi-Jeong Yoo
- Department of Biology, Clarkson University, Potsdam, NY 13699, USA;
| | - Sixue Chen
- Interdisciplinary Center for Biotechnology Research, University of Florida, Gainesville, FL 32610, USA; (J.K.); (S.C.)
- Department of Biology, Genetics Institute, University of Florida, Gainesville, FL 32610, USA
| | - Seunghee Cha
- Oral and Maxillofacial Diagnostic Sciences, University of Florida College of Dentistry, Gainesville, FL 32610, USA; (M.M.); (R.M.)
- Oral Biology, University of Florida College of Dentistry, Gainesville, FL 32610, USA
- Center for Orphaned Autoimmune Disorders, University of Florida College of Dentistry, Gainesville, FL 32610, USA
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Wu H, Ding L, Wang Y, Zou TB, Wang T, Fu W, Lin Y, Zhang X, Chen K, Lei Y, Zhong C, Luo C. MiR-615 Regulates NSC Differentiation In Vitro and Contributes to Spinal Cord Injury Repair by Targeting LINGO-1. Mol Neurobiol 2020; 57:3057-3074. [PMID: 32462552 DOI: 10.1007/s12035-020-01936-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 05/13/2020] [Indexed: 01/25/2023]
Abstract
LINGO-1(LRR and Ig domain-containing NOGO receptor interacting protein 1) is a viable target for spinal cord injury (SCI) repair due to its potent negative regulation in neuron survival and axonal regeneration. Although promising, the intracellular mechanism underlying LINGO-1 regulation is unclear. Here, we identified miR-615 as a potential microRNA (miRNA) that directly targets LINGO-1 by binding its 3'-untranslated region (3'-UTR) and caused the translation inhibition of LINGO-1. MiR-615 negatively regulated LINGO-1 during neural stem cell (NSC) differentiation and facilitated its neuronal differentiation in vitro. Interestingly, compared to the control, neurons differentiated from miR-615-treated NSCs were immature with short processes. Further results showed LINGO-1/epidermal growth factor receptor (EGFR) signaling may be involved in this process, as blockade of EGFR using specific antagonist resulted in mature neurons with long processes. Furthermore, intrathecal administration of miR-615 agomir in SCI rats effectively knocked down LINGO-1, increased neuronal survival, enhanced axonal extension and myelination, and improved recovery of hindlimbs motor functions. This work thus uncovers miR-615 as an effective miRNA that regulates LINGO-1 in NSC and SCI animals, and suggests miR-615 as a potential therapeutic target for traumatic central nervous system (CNS) injury.
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Affiliation(s)
- Hongfu Wu
- Institute of Stem Cells and Regenerative Medicine, Department of Physiology, Guangdong Medical University, No. 1, Xin Cheng Road, Songshan Lake, Dongguan, 523808, China.
| | - Lu Ding
- Institute of Stem Cells and Regenerative Medicine, Department of Physiology, Guangdong Medical University, No. 1, Xin Cheng Road, Songshan Lake, Dongguan, 523808, China.,Scientific Research Center, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, China
| | - Yuhui Wang
- Department of Surgery, The Third Hospital of Guangdong Medical University (Longjiang Hospital of Shunde District), Foshan, Guangdong, China
| | - Tang-Bin Zou
- Department of Nutrition and Food Hygiene, Guangdong Medical University, Dongguan, China
| | - Tao Wang
- Department of Surgery, The Third Hospital of Guangdong Medical University (Longjiang Hospital of Shunde District), Foshan, Guangdong, China
| | - Wenjin Fu
- Clinical Laboratory, Dongguan Municipal Houjie Hospital of Guangdong Medical University, Dongguan, Guangdong, China
| | - Yong Lin
- Department of Surgery, The Third Hospital of Guangdong Medical University (Longjiang Hospital of Shunde District), Foshan, Guangdong, China
| | - Xiaomin Zhang
- Institute of Stem Cells and Regenerative Medicine, Department of Physiology, Guangdong Medical University, No. 1, Xin Cheng Road, Songshan Lake, Dongguan, 523808, China
| | - Kangzhen Chen
- Institute of Stem Cells and Regenerative Medicine, Department of Physiology, Guangdong Medical University, No. 1, Xin Cheng Road, Songshan Lake, Dongguan, 523808, China
| | - Yutian Lei
- Hand & Foot Surgery, Dongguan Municipal Houjie Hospital of Guangdong Medical University, Dongguan, Guangdong, China
| | - Caitang Zhong
- Department of Surgery, The Third Hospital of Guangdong Medical University (Longjiang Hospital of Shunde District), Foshan, Guangdong, China
| | - Chuanming Luo
- Department of Neurology, The Seventh Affiliated Hospital, Sun Yat-Sen University, No.628, Zhenyuan Road, Xinhu Street, Guangming New District, Shenzhen, 518107, China.
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Cruz L, Romero JAA, Iglesia RP, Lopes MH. Extracellular Vesicles: Decoding a New Language for Cellular Communication in Early Embryonic Development. Front Cell Dev Biol 2018; 6:94. [PMID: 30211159 PMCID: PMC6121069 DOI: 10.3389/fcell.2018.00094] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 07/30/2018] [Indexed: 01/08/2023] Open
Abstract
The blastocyst inner cell mass (ICM) that gives rise to a whole embryo in vivo can be derived and cultured in vitro as embryonic stem cells (ESCs), which retain full developmental potential. ICM cells receive, from diverse sources, complex molecular and spatiotemporal signals that orchestrate the finely-tuned processes associated with embryogenesis. Those instructions come, continuously, from themselves and from surrounding cells, such as those present in the trophectoderm and primitive endoderm (PrE). A key component of the ICM niche are the extracellular vesicles (EVs), produced by distinct cell types, that carry and transfer key molecules that regulate target cells and modulate cell renewal or cell fate. A growing number of studies have demonstrated the extracellular circulation of morphogens, a group of classical regulators of embryo development, are carried by EVs. miRNAs are also an important cargo of the EVs that have been implicated in tissue morphogenesis and have gained special attention due to their ability to regulate protein expression through post-transcriptional modulation, thereby influencing cell phenotype. This review explores the emerging evidence supporting the role of EVs as an additional mode of intercellular communication in early embryonic and ESCs differentiation.
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Affiliation(s)
- Lilian Cruz
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Jenny A A Romero
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Rebeca P Iglesia
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Marilene H Lopes
- Department of Cell and Developmental Biology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
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Xu B, Ji X, Chen X, Yao M, Han X, Chen M, Tang W, Xia Y. Effect of perfluorooctane sulfonate on pluripotency and differentiation factors in mouse embryoid bodies. Toxicology 2015; 328:160-7. [DOI: 10.1016/j.tox.2014.12.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2014] [Revised: 12/10/2014] [Accepted: 12/10/2014] [Indexed: 11/15/2022]
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6
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Chiu SC, Chung HY, Cho DY, Chan TM, Liu MC, Huang HM, Li TY, Lin JY, Chou PC, Fu RH, Yang WK, Harn HJ, Lin SZ. Therapeutic potential of microRNA let-7: tumor suppression or impeding normal stemness. Cell Transplant 2015; 23:459-69. [PMID: 24816444 DOI: 10.3727/096368914x678418] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The first microRNA, let-7, and its family were discovered in Caenorhabditis elegans and are functionally conserved from worms to humans in the regulation of embryonic development and stemness. The let-7 family has been shown to have an essential role in stem cell differentiation and tumor-suppressive activity. Deregulating expression of let-7 is commonly reported in many human cancers. Emerging evidence has accumulated and suggests that reestablishment of let-7 in tumor cells is a valuable therapeutic strategy. However, findings reach beyond tumor therapeutics and may impinge on stemness and differentiation of stem cells. In this review, we discuss the role of let-7 in development and differentiation of normal adult stem/progenitor cells and offer a viewpoint of the association between deregulated let-7 expression and tumorigenesis. The regulation of let-7 expression, cancer-relevant let-7 targets, and the application of let-7 are highlighted.
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Affiliation(s)
- Shao-Chih Chiu
- Graduate Institute of Immunology, China Medical University, Taichung, Taiwan
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Substrate-dependent gene regulation of self-assembled human MSC spheroids on chitosan membranes. BMC Genomics 2014; 15:10. [PMID: 24387160 PMCID: PMC4046657 DOI: 10.1186/1471-2164-15-10] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Accepted: 12/21/2013] [Indexed: 01/09/2023] Open
Abstract
Background Three-dimensional (3D) multicellular spheroids of mesenchymal stem cells (MSCs) are generally regarded to have beneficial properties over MSCs in monolayer. Recent literatures have documented that MSCs can self-assemble into 3D spheroids with a greater capacity for differentiation into various cell types when grown on chitosan (CS), a biopolymer. The genomic modulation occurring in these MSC spheroids is thus of essential importance for understanding their uniqueness and therapeutic potentials. In this study, 3D spheroids self-assembled from human umbilical cord MSCs grown on CS membranes were analyzed by mRNA as well as microRNA microarrays, which helped identify the critical signaling events that may alter the cellular functions during the spheroid forming process. Results Genes screened from mRNA and microRNA cross-correlation analyses were further confirmed with the quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR) analysis. Results revealed the regulation of a significant number of calcium-associated genes, which suggested the crucial role of calcium signaling in CS-derived MSC spheroids. In addition, many genes associated with the multilineage differentiation capacities and those associated with the antiinflammatory and antitumor properties of MSCs were upregulated. The genetic modulation was significantly more remarkable and endured longer for MSC spheroids derived on CS substrates compared to those derived on a non-adherent (polyvinyl alcohol) substrate. Conclusions Based on the study, the culture substrates used to prepare 3D MSC spheroids may predefine their properties through cell-substrate interaction. Electronic supplementary material The online version of this article (doi:10.1186/1471-2164-15-10) contains supplementary material, which is available to authorized users.
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8
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Şen M, Ino K, Inoue KY, Arai T, Nishijo T, Suda A, Kunikata R, Shiku H, Matsue T. LSI-based amperometric sensor for real-time monitoring of embryoid bodies. Biosens Bioelectron 2013; 48:12-8. [DOI: 10.1016/j.bios.2013.03.069] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Revised: 03/26/2013] [Accepted: 03/27/2013] [Indexed: 10/27/2022]
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9
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Chen X, Xu B, Han X, Mao Z, Talbot P, Chen M, Du G, Chen A, Liu J, Wang X, Xia Y. Effect of bisphenol A on pluripotency of mouse embryonic stem cells and differentiation capacity in mouse embryoid bodies. Toxicol In Vitro 2013; 27:2249-55. [PMID: 24090592 DOI: 10.1016/j.tiv.2013.09.018] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Revised: 08/13/2013] [Accepted: 09/23/2013] [Indexed: 12/01/2022]
Abstract
Bisphenol A (BPA) poses potential risks to reproduction and development. However, the mechanism of BPA's effects on early embryonic development is still unknown. Embryonic stem cells (ESC) and embryoid bodies (EB) provide valuable in vitro models for testing the toxic effects of environmental chemicals in early embryogenesis. In this study, mouse embryonic stem cells (mESC) were acutely exposed to BPA for 24h, and general cytotoxicity and the effect of BPA on pluripotency were then evaluated. Meanwhile, mouse embryoid bodies (mEB) were exposed to BPA up to 6 days and their differentiation capacity was evaluated. In mESC and mEB, we found that BPA up-regulated pluripotency markers (Oct4, Sox2 and Nanog) at mRNA and/or protein levels. Moreover, BPA increased the mRNA levels of endodermal markers (Gata4,Sox17) and mesodermal markers (Sma,Desmin), and reduced the mRNA levels of ectodermal markers (Nestin,Fgf5) in mEB. Furthermore, microRNA(miR)-134, an expression inhibitor of pluripotency markers including Oct4, Sox2 and Nanog, was decreased both in BPA-treated mESC and mEB. These results firstly indicate that BPA may disturb pluripotency in mESC and differentiation of mEB, and may inhibit ectodermal lineage differentiation of mEB while miR-134 may play a key role underlying this effect.
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Affiliation(s)
- Xiaojiao Chen
- State Key Laboratory of Reproductive Medicine, Nanjing Maternity and Child Health Hospital, Nanjing Medical University, Nanjing 210029, China; Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
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10
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Dynamic expression of microRNAs during the differentiation of human embryonic stem cells into insulin-producing cells. Gene 2013; 518:246-55. [DOI: 10.1016/j.gene.2013.01.038] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Revised: 01/07/2013] [Accepted: 01/15/2013] [Indexed: 11/20/2022]
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11
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MicroRNA signatures of iPSCs and endoderm-derived tissues. Gene Expr Patterns 2012; 13:12-20. [PMID: 22982176 DOI: 10.1016/j.gep.2012.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 08/10/2012] [Accepted: 08/30/2012] [Indexed: 01/03/2023]
Abstract
MicroRNAs (miRNAs), small non-coding RNAs that fine-tune gene expression, play multiple roles in the cell, including cell fate specification. We have analyzed the differential expression of miRNAs during fibroblast reprogramming into induced pluripotent stem cells (iPSCs) and endoderm induction from iPSCs upon treatment with high concentrations of Activin-A. The reprogrammed iPSCs assumed an embryonic stem cell (ESC)-like miRNA signature, marked by the induction of pluripotency clusters miR-290-295 and miR-302/367 and conversely the downregulation of the let-7 family. On the other hand, endoderm induction in iPSCs resulted in the upregulation of 13 miRNAs. Given that the liver and the pancreas are common derivatives of the endoderm, analysis of the expression of these 13 upregulated miRNAs in hepatocytes and pancreatic islets revealed a tendency for these miRNAs to be expressed more in pancreatic islets than in hepatocytes. These observations provide insights into how differentiation may be guided more efficiently towards the endoderm and further into the liver or pancreas. Moreover, we also report novel miRNAs enriched for each of the cell types analyzed.
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Yang IP, Tsai HL, Hou MF, Chen KC, Tsai PC, Huang SW, Chou WW, Wang JY, Juo SHH. MicroRNA-93 inhibits tumor growth and early relapse of human colorectal cancer by affecting genes involved in the cell cycle. Carcinogenesis 2012; 33:1522-30. [PMID: 22581829 DOI: 10.1093/carcin/bgs166] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
PURPOSE Colorectal cancer (CRC) is associated with high recurrence and mortality. Because deregulation of microRNAs is associated with CRC development and recurrence, the expression levels of microRNAs can be a simple and reliable biomarker to detect postoperative early relapse, thereby helping physicians to treat high-risk patients more efficiently. EXPERIMENTAL DESIGN We used microRNA arrays and observed that microRNA-93 had substantially different expression levels in early (recurrence within 12 months after surgery) and non-early relapse CRC patients. The replication study, which included 35 early relapse and 42 non-early relapse subjects, further confirmed overexpression of microRNA-93 in non-early relapse samples. The in vitro and in vivo effects of microRNA-93 were investigated by examining cell proliferation, migration and invasion, as well as cell cycles, target-gene expression and xenograft in null mice. RESULTS Cellular studies showed that the overexpression of microRNA-93 inhibited colon cancer cell proliferation and migration but not invasion. The cell cycle studies also revealed that microRNA-93 caused an accumulation of the G2 population. However, microRNA-93 could not induce cell apoptosis or necrosis. Functional studies showed that microRNA-93 could suppress CCNB1 protein expression leading to cell cycle arrest in the G2 phase. Moreover, microRNA-93 repressed expression of ERBB2, p21 and VEGF, all of which are involved in cell proliferation. MicroRNA-93 also suppressed tumor growth in null mice. CONCLUSIONS This study showed that microRNA-93 can inhibit tumorigenesis and reduce the recurrence of CRC; these findings may have potential clinical applications for predicting the recurrence of CRC.
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Affiliation(s)
- I-Ping Yang
- Department of Medical Genetics College of Medicine, Kaohsiung Medical University Kaohsiung, Taiwan
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13
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A Pt layer/Pt disk electrode configuration to evaluate respiration and alkaline phosphatase activities of mouse embryoid bodies. Talanta 2012; 94:30-5. [DOI: 10.1016/j.talanta.2012.01.059] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Revised: 01/27/2012] [Accepted: 01/30/2012] [Indexed: 01/16/2023]
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14
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Skreka K, Schafferer S, Nat IR, Zywicki M, Salti A, Apostolova G, Griehl M, Rederstorff M, Dechant G, Hüttenhofer A. Identification of differentially expressed non-coding RNAs in embryonic stem cell neural differentiation. Nucleic Acids Res 2012; 40:6001-15. [PMID: 22492625 PMCID: PMC3401476 DOI: 10.1093/nar/gks311] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Protein-coding genes, guiding differentiation of ES cells into neural cells, have extensively been studied in the past. However, for the class of ncRNAs only the involvement of some specific microRNAs (miRNAs) has been described. Thus, to characterize the entire small non-coding RNA (ncRNA) transcriptome, involved in the differentiation of mouse ES cells into neural cells, we have generated three specialized ribonucleo-protein particle (RNP)-derived cDNA libraries, i.e. from pluripotent ES cells, neural progenitors and differentiated neural cells, respectively. By high-throughput sequencing and transcriptional profiling we identified several novel miRNAs to be involved in ES cell differentiation, as well as seven small nucleolar RNAs. In addition, expression of 7SL, 7SK and vault-2 RNAs was significantly up-regulated during ES cell differentiation. About half of ncRNA sequences from the three cDNA libraries mapped to intergenic or intragenic regions, designated as interRNAs and intraRNAs, respectively. Thereby, novel ncRNA candidates exhibited a predominant size of 18-30 nt, thus resembling miRNA species, but, with few exceptions, lacking canonical miRNA features. Additionally, these novel intraRNAs and interRNAs were not only found to be differentially expressed in stem-cell derivatives, but also in primary cultures of hippocampal neurons and astrocytes, strengthening their potential function in neural ES cell differentiation.
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Affiliation(s)
- Konstantinia Skreka
- Division of Genomics and RNomics, Biocenter, Medical University Innsbruck, Innrain 80/82, A-6020 Innsbruck, Austria
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Inference of gene regulation via miRNAs during ES cell differentiation using MiRaGE method. Int J Mol Sci 2011; 12:9265-76. [PMID: 22272132 PMCID: PMC3257129 DOI: 10.3390/ijms12129265] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Revised: 11/22/2011] [Accepted: 11/29/2011] [Indexed: 12/16/2022] Open
Abstract
MicroRNA (miRNA) is a critical regulator of cell growth, differentiation, and development. To identify important miRNAs in a biological process, many bioinformatical tools have been developed. We have developed MiRaGE (MiRNA Ranking by Gene Expression) method to infer the regulation of gene expression by miRNAs from changes of gene expression profiles. The method does not require precedent array normalization. We applied the method to elucidate possibly important miRNAs during embryonic stem (ES) cell differentiation to neuronal cells and we infer that certain miRNAs, including miR-200 family, miR-429, miR-302 family, and miR-17-92 cluster members may be important to the maintenance of undifferentiated status in ES cells.
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16
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Li X, Wang Q, Zheng Y, Lv S, Ning S, Sun J, Huang T, Zheng Q, Ren H, Xu J, Wang X, Li Y. Prioritizing human cancer microRNAs based on genes' functional consistency between microRNA and cancer. Nucleic Acids Res 2011; 39:e153. [PMID: 21976726 PMCID: PMC3239203 DOI: 10.1093/nar/gkr770] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The identification of human cancer-related microRNAs (miRNAs) is important for cancer biology research. Although several identification methods have achieved remarkable success, they have overlooked the functional information associated with miRNAs. We present a computational framework that can be used to prioritize human cancer miRNAs by measuring the association between cancer and miRNAs based on the functional consistency score (FCS) of the miRNA target genes and the cancer-related genes. This approach proved successful in identifying the validated cancer miRNAs for 11 common human cancers with area under ROC curve (AUC) ranging from 71.15% to 96.36%. The FCS method had a significant advantage over miRNA differential expression analysis when identifying cancer-related miRNAs with a fine regulatory mechanism, such as miR-27a in colorectal cancer. Furthermore, a case study examining thyroid cancer showed that the FCS method can uncover novel cancer-related miRNAs such as miR-27a/b, which were showed significantly upregulated in thyroid cancer samples by qRT-PCR analysis. Our method can be used on a web-based server, CMP (cancer miRNA prioritization) and is freely accessible at http://bioinfo.hrbmu.edu.cn/CMP. This time- and cost-effective computational framework can be a valuable complement to experimental studies and can assist with future studies of miRNA involvement in the pathogenesis of cancers.
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Affiliation(s)
- Xia Li
- College of Bioinformatics Science and Technology, Cancer Hospital Affiliated to Harbin Medical University, Harbin, 150081, China.
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Differential genomic imprinting and expression of imprinted microRNAs in testes-derived male germ-line stem cells in mouse. PLoS One 2011; 6:e22481. [PMID: 21799869 PMCID: PMC3142150 DOI: 10.1371/journal.pone.0022481] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2011] [Accepted: 06/22/2011] [Indexed: 11/19/2022] Open
Abstract
Background Testis-derived male germ-line stem (GS) cells, the in vitro counterpart of spermatogonial stem cells (SSC), can acquire multipotency under appropriate culture conditions to become multipotent adult germ-line stem (maGS) cells, which upon testicular transplantation, produce teratoma instead of initiating spermatogenesis. Consequently, a molecular marker that can distinguish GS cells from maGS cells would be of potential value in both clinical and experimental research settings. Methods and Findings Using mouse as a model system, here we show that, similar to sperm, expression of imprinted and paternally expressed miRNAs (miR-296-3p, miR-296-5p, miR-483) were consistently higher (P<0.001), while those of imprinted and maternally expressed miRNA (miR-127, miR-127-5p) were consistently lower (P<0.001) in GS cells than in control embryonic stem (ES) cells. DNA methylation analyses of imprinting control regions (ICR), that control the expression of all imprinted miRNAs in respective gene clusters (Gnas-Nespas DMR, Igf2-H19 ICR and Dlk1-Dio3 IG-DMR), confirmed that imprinted miRNAs were androgenetic in GS cells. On the other hand, DNA methylation of imprinted miRNA genes in maGS cells resembled those of ES cells but the expression pattern of the imprinted miRNAs was intermediate between those of GS and ES cells. The expression of imprinted miRNAs in GS and maGS cells were also altered during their in vitro differentiation and varied both with the differentiation stage and the miRNA. Conclusions Our data suggest that GS cells have androgenetic DNA methylation and expression of imprinted miRNAs which changes to ES cell-like pattern upon their conversion to maGS cells. Differential genomic imprinting of imprinted miRNAs may thus, serve as epigenetic miRNA signature or molecular marker to distinguish GS cells from maGS cells.
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