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Medeiros Tavares Marques JC, Cornélio DA, Nogueira Silbiger V, Ducati Luchessi A, de Souza S, Batistuzzo de Medeiros SR. Identification of new genes associated to senescent and tumorigenic phenotypes in mesenchymal stem cells. Sci Rep 2017; 7:17837. [PMID: 29259202 PMCID: PMC5736717 DOI: 10.1038/s41598-017-16224-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 11/08/2017] [Indexed: 02/06/2023] Open
Abstract
Although human mesenchymal stem cells (hMSCs) are a powerful tool for cell therapy, prolonged culture times result in replicative senescence or acquisition of tumorigenic features. To identify a molecular signature for senescence, we compared the transcriptome of senescent and young hMSCs with normal karyotype (hMSCs/n) and with a constitutional inversion of chromosome 3 (hMSC/inv). Senescent and young cells from both lineages showed differentially expressed genes (DEGs), with higher levels in senescent hMSCs/inv. Among the 30 DEGs in senescent hMSC/inv, 11 are new candidates for biomarkers of cellular senescence. The functional categories most represented in senescent hMSCs were related to cellular development, cell growth/proliferation, cell death, cell signaling/interaction, and cell movement. Mapping of DEGs onto biological networks revealed matrix metalloproteinase-1, thrombospondin 1, and epidermal growth factor acting as topological bottlenecks. In the comparison between senescent hMSCs/n and senescent hMSCs/inv, other functional annotations such as segregation of chromosomes, mitotic spindle formation, and mitosis and proliferation of tumor lines were most represented. We found that many genes categorized into functional annotations related to tumors in both comparisons, with relation to tumors being highest in senescent hMSCs/inv. The data presented here improves our understanding of the molecular mechanisms underlying the onset of cellular senescence as well as tumorigenesis.
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Affiliation(s)
- Joana Cristina Medeiros Tavares Marques
- Faculdade de Ciências da Saúde do Trairi (FACISA), Universidade Federal do Rio Grande do Norte (UFRN), Rua Traíri, S/N, Centro, Santa Cruz, Rio Grande do Norte (RN), 59200-000, Brazil
| | - Déborah Afonso Cornélio
- Laboratório de Biologia Molecular e Genômica, Centro de Biociências, UFRN, Campus Universitário, Avenida Senador Salgado Filho, 3000, Lagoa nova, Natal, RN, 59078-900, Brazil
| | - Vivian Nogueira Silbiger
- Departamento de Análises Clínicas e Toxicológicas, Centro de Ciências da Saúde, CCS/UFRN, Av General Cordeiro de Farias S/N, Petropolis, Natal, 59010-115, RN, Brazil
| | - André Ducati Luchessi
- Departamento de Análises Clínicas e Toxicológicas, Centro de Ciências da Saúde, CCS/UFRN, Av General Cordeiro de Farias S/N, Petropolis, Natal, 59010-115, RN, Brazil
| | - Sandro de Souza
- Instituto do Cérebro, Instituto de Metrópole Digital, UFRN, Av. Nascimento de Castro, 2155, UFRN, 59056-450, RN, Brazil
| | - Silvia Regina Batistuzzo de Medeiros
- Laboratório de Biologia Molecular e Genômica, Centro de Biociências, UFRN, Campus Universitário, Avenida Senador Salgado Filho, 3000, Lagoa nova, Natal, RN, 59078-900, Brazil.
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Kuniakova M, Oravcova L, Varchulova-Novakova Z, Viglaska D, Danisovic L. Somatic stem cell aging and malignant transformation – impact on therapeutic application. ACTA ACUST UNITED AC 2015; 20:743-56. [DOI: 10.1515/cmble-2015-0045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Accepted: 10/07/2015] [Indexed: 12/22/2022]
Abstract
AbstractSomatic stem cells possess unique properties of self-renewal and plasticity which make them promising candidates for use in tissue engineering and regenerative medicine, in addition to serving as efficient delivery vehicles in site-specific therapy. In the case of therapeutic application, it is essential to isolate and culture stem cells in vitro, to obtain them in sufficient quantities. Although long-term cultivation provides an adequate number of cells, it has been shown that this approach is associated with increased risk of transformation of cultured cells, which presents a significant biological hazard. This article reviews information about biological features and cellular events which occur during long-term cultivation of somatic stem cells, with respect to their safe utilization in potential clinical practice.
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Chen T, Sun Y, Ji P, Kopetz S, Zhang W. Topoisomerase IIα in chromosome instability and personalized cancer therapy. Oncogene 2014; 34:4019-31. [PMID: 25328138 PMCID: PMC4404185 DOI: 10.1038/onc.2014.332] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 09/08/2014] [Accepted: 09/08/2014] [Indexed: 12/29/2022]
Abstract
Genome instability is a hallmark of cancer cells. Chromosome instability (CIN), which is often mutually exclusive from hypermutation genotypes, represents a distinct subtype of genome instability. Hypermutations in cancer cells are due to defects in DNA repair genes, but the cause of CIN is still elusive. However, because of the extensive chromosomal abnormalities associated with CIN, its cause is likely a defect in a network of genes that regulate mitotic checkpoints and chromosomal organization and segregation. Emerging evidence has shown that the chromosomal decatenation checkpoint, which is critical for chromatin untangling and packing during genetic material duplication, is defective in cancer cells with CIN. The decatenation checkpoint is known to be regulated by a family of enzymes called topoisomerases. Among them, the gene encoding topoisomerase IIα (TOP2A) is commonly altered at both gene copy number and gene expression level in cancer cells. Thus, abnormal alterations of TOP2A, its interacting proteins, and its modifications may play a critical role in CIN in human cancers. Clinically, a large arsenal of topoisomerase inhibitors have been used to suppress DNA replication in cancer. However, they often lead to the secondary development of leukemia because of their effect on the chromosomal decatenation checkpoint. Therefore, topoisomerase drugs must be used judiciously and administered on an individual basis. In this review, we highlight the biological function of TOP2A in chromosome segregation and the mechanisms that regulate this enzyme's expression and activity. We also review the roles of TOP2A and related proteins in human cancers, and raise a perspective for how to target TOP2A in personalized cancer therapy.
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Affiliation(s)
- T Chen
- 1] Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA [2] Department of Endoscopy Center, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Y Sun
- Department of Pathology, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China
| | - P Ji
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - S Kopetz
- Department of Gastrointestinal Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - W Zhang
- Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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Zhou X. Cancer bioinformatics: detection of chromatin states, SNP-containing motifs, and functional enrichment modules. CHINESE JOURNAL OF CANCER 2013; 32:153-4. [PMID: 23544450 PMCID: PMC3845569 DOI: 10.5732/cjc.013.10045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In this editorial preface, I briefly review cancer bioinformatics and introduce the four articles in this special issue highlighting important applications of the field: detection of chromatin states; detection of SNP-containing motifs and association with transcription factor-binding sites; improvements in functional enrichment modules; and gene association studies on aging and cancer. We expect this issue to provide bioinformatics scientists, cancer biologists, and clinical doctors with a better understanding of how cancer bioinformatics can be used to identify candidate biomarkers and targets and to conduct functional analysis.
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