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https://www.readbyqxmd.com/read/28528497/microrna-30a-5p-mir-30a-regulates-cell-motility-and-emt-by-directly-targeting-oncogenic-tm4sf1-in-colorectal-cancer
#1
Y R Park, S L Kim, M R Lee, S Y Seo, J H Lee, S H Kim, I H Kim, S O Lee, S T Lee, Sang Wook Kim
PURPOSE: Colorectal cancer (CRC) is one of the leading causes of cancer death worldwide, and many oncogenes and tumor suppressor genes are involved in CRC. MicroRNAs (miRNAs) are small non-coding RNAs that can negatively regulate gene expression. Previous studies have revealed that miRNAs regulate the development and progression of many cancers. In this study, we investigated the role of microRNA-30a-5p (miR-30a) in CRC and its unknown mechanisms. METHODS: qRT-PCR was used to detect miR-30a and TM4SF1 mRNA expression in CRC specimens and cell lines...
May 20, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28528452/tumor-suppressor-protein-p53-exerts-negative-transcriptional-regulation-on-human-sodium-iodide-symporter-gene-expression-in-breast-cancer
#2
Madhura G Kelkar, Bhushan Thakur, Abhishek Derle, Sushmita Chatterjee, Pritha Ray, Abhijit De
PURPOSE: Aberrant expression of human sodium iodide symporter (NIS) in breast cancer (BC) is well documented but the transcription factors (TF) regulating its aberrant expression is poorly known. We identify the presence of three p53 binding sites on the human NIS promoter sequence by conducting genome-wide TF analysis, and further investigate their regulatory role. METHODS: The differences in transcription and translation were measured by real-time PCR, luciferase reporter assay, site-directed mutagenesis, in vivo optical imaging, and chromatin immunoprecipitation...
May 20, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28527294/activation-of-hypoxia-signaling-in-stromal-progenitors-impairs-kidney-development
#3
Katharina Gerl, Dominik Steppan, Michaela Fuchs, Charlotte Wagner, Carsten Willam, Armin Kurtz, Birgül Kurt
Intrauterine hypoxia is a reason for impaired kidney development. The cellular and molecular pathways along which hypoxia exerts effects on nephrogenesis are not well understood. They are likely triggered by hypoxia-inducible transcription factors (HIFs), and their effects appear to be dependent on the cell compartment contributing to kidney formation. In this study, we investigated the effects of HIF activation in the developing renal stroma, which also essentially modulates nephron development from the metanephric mesenchyme...
May 17, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28527113/mutant-p53-promotes-cell-spreading-and-migration-via-arhgap44
#4
Jinjin Xu, Jian Jiao, Wei Xu, Lei Ji, Dongjie Jiang, Shaofang Xie, Syeda Kubra, Xiaotao Li, Junjiang Fu, Jianru Xiao, Bianhong Zhang
The tumor suppressor p53 protein is either lost or mutated in about half of all human cancers. Loss of p53 function is well known to influence cell spreading, migration and invasion. While expression of mutant p53 is not equivalent to p53 loss, mutant p53 can acquire new functions to drive cell spreading and migration via different mechanisms. In our study, we found that mutant p53 significantly increased cell spreading and migration when comparing with p53-null cells. RNA-Seq analysis suggested that Rho GTPase activating protein 44 (ARHGAP44) is a new target of mutant p53, which suppressed ARHGAP44 transcription...
May 16, 2017: Science China. Life Sciences
https://www.readbyqxmd.com/read/28527050/interplay-between-sirt-3-metabolism-and-its-tumor-suppressor-role-in-hepatocellular-carcinoma
#5
REVIEW
Serena De Matteis, Anna Maria Granato, Roberta Napolitano, Chiara Molinari, Martina Valgiusti, Daniele Santini, Francesco Giuseppe Foschi, Giorgio Ercolani, Umberto Vespasiani Gentilucci, Luca Faloppi, Mario Scartozzi, Giovanni Luca Frassineti, Andrea Casadei Gardini
Sirtuins (SIRT), first described as nicotinamide adenine dinucleotide (NAD(+))-dependent type III histone deacetylases, are produced by cells to support in the defense against chronic stress conditions such as metabolic syndromes, neurodegeneration, and cancer. SIRT-3 is one of the most studied members of the mitochondrial sirtuins family. In particular, its involvement in metabolic diseases and its dual role in cancer have been described. In the present review, based on the evidence of SIRT-3 involvement in metabolic dysfunctions, we aimed to provide an insight into the multifaceted role of SIRT-3 in many solid and hematological tumors with a particular focus on hepatocellular carcinoma (HCC)...
May 19, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28526948/an-innovative-strategy-to-clone-positive-modifier-genes-of-defects-caused-by-mtdna-mutations-mrps18c-as-suppressor-gene-of-m-3946g-a-mutation-in-mt-nd1-gene
#6
María Elena Rodríguez-García, Francisco Javier Cotrina-Vinagre, Patricia Carnicero-Rodríguez, Francisco Martínez-Azorín
We have developed a new functional complementation approach to clone modifier genes which overexpression is able to suppress the biochemical defects caused by mtDNA mutations (suppressor genes). This strategy consists in transferring human genes into respiratory chain-deficient fibroblasts, followed by a metabolic selection in a highly selective medium. We used a normalized expression cDNA library in an episomal vector (pREP4) to transfect the fibroblasts, and a medium with glutamine and devoid of any carbohydrate source to select metabolically...
May 19, 2017: Human Genetics
https://www.readbyqxmd.com/read/28526868/chitosan-dextran-sulfate-coated-doxorubicin-loaded-plga-pva-nanoparticles-caused-apoptosis-in-doxorubicin-resistance-breast-cancer-cells-through-induction-of-dna-damage
#7
Sumit Siddharth, Anmada Nayak, Deepika Nayak, Birendra Kumar Bindhani, Chanakya Nath Kundu
To overcome the toxicity, pharmacokinetics and drug resistance associated with doxorubicin (DOX), a strategy was developed by encapsulating DOX- loaded-PLGA-PVA- nanoparticles within chitosan-dextran sulfate nanoparticles (CS-DS) [CS-DS-coated-DOX-loaded -PLGA-PVA-NP] and study the sensitivity against DOX- resistance- breast cancer cells (MCF-7-DOX-R). These CS-DS and PLGA-PVA double coated DOX are spherical, stable, polydispersed and have zeta potential +2.89 mV. MCF-7- DOX-R cells were derived by exposing increasing doses of DOX in MCF-7 cells...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526834/the-transcription-factor-irf6-co-represses-ppar%C3%AE-mediated-cytoprotection-in-ischemic-cerebrovascular-endothelial-cells
#8
Rongzhong Huang, Zicheng Hu, Yuxing Feng, Lehua Yu, Xingsheng Li
Activation of peroxisome proliferator-activated receptor gamma (PPARγ) in the cerebrovascular endothelium is a key suppressor of post-stroke brain damage. However, the role of PPARγ's co-regulators during cerebral ischemia remains largely unknown. Here, we show that the transcription factor IRF6 is a novel PPARγ co-regulator that directly binds to and suppresses PPARγ activity in murine cerebrovascular endothelial cells. Moreover, IRF6 was also revealed to be a transcriptional target of PPARγ suppression, with PPARγ silencing significantly promoting IRF6 expression in cerebrovascular endothelial cells...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526829/super-enhancers-and-broad-h3k4me3-domains-form-complex-gene-regulatory-circuits-involving-chromatin-interactions
#9
Fan Cao, Yiwen Fang, Hong Kee Tan, Yufen Goh, Jocelyn Yeen Hui Choy, Bryan Thean Howe Koh, Jiong Hao Tan, Nicolas Bertin, Aroul Ramadass, Ewan Hunter, Jayne Green, Matthew Salter, Alexandre Akoulitchev, Wilson Wang, Wee Joo Chng, Daniel G Tenen, Melissa J Fullwood
Stretched histone regions, such as super-enhancers and broad H3K4me3 domains, are associated with maintenance of cell identity and cancer. We connected super-enhancers and broad H3K4me3 domains in the K562 chronic myelogenous leukemia cell line as well as the MCF-7 breast cancer cell line with chromatin interactions. Super-enhancers and broad H3K4me3 domains showed higher association with chromatin interactions than their typical counterparts. Interestingly, we identified a subset of super-enhancers that overlap with broad H3K4me3 domains and show high association with cancer-associated genes including tumor suppressor genes...
May 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28526815/partition-defective-3-pard3-regulates-proliferation-apoptosis-migration-and-invasion-in-esophageal-squamous-cell-carcinoma-cells
#10
Lei Wang, Haiping Zhang, Ayshamgul Hasim, Abuduaini Tuerhong, Zhichao Hou, Ablajan Abdurahmam, Ilyar Sheyhidin
BACKGROUND Altered expression of partition-defective 3 (PARD3), a polarity-related gene associated with oncogenesis, has been identified in some cancers, but the role of PARD3 in esophageal squamous cell carcinoma (ESCC) remains unclear. MATERIAL AND METHODS PARD3 expression in Eca109 cells was silenced using siRNA and overexpressed using an expression vector. We investigated the role of PARD3 in ESCC growth and motility to evaluate its potential role in ESCC. Transwell assay was used to evaluated cell migration and invasion...
May 20, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28526240/endocrine-actions-of-vitamin-d-in-skin-relevance-for-photocarcinogenesis-of-non-melanoma-skin-cancer-and-beyond
#11
REVIEW
Jörg Reichrath, Roman Saternus, Thomas Vogt
The skin represents a pivotal organ for the human body's vitamin D endocrine system, being both the site of ultraviolet (UV)-B-induced vitamin D synthesis and a target tissue for the pluripotent effects of 1,25(OH)2D3 and other biologically active vitamin D metabolites. As many other steroid hormones, 1,25(OH)2D3 exerts its effects via two independent signal transduction pathways: the classical genomic and the non-genomic pathway. While non-genomic effects of 1,25(OH)2D3 are in part exerted via effects on intracellular calcium, genomic effects are mediated by the vitamin D receptor (VDR)...
May 16, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28525948/microrna-203-inhibits-proliferation-and-invasion-and-promotes-apoptosis-of-osteosarcoma-cells-by-targeting-runt-related-transcription-factor-2
#12
Wenjun Lin, Xiongbai Zhu, Shengwu Yang, Xin Chen, Lu Wang, Zhengxiang Huang, Yewei Ding, Lintuo Huang, Chen Lv
Accumulating evidence indicates that microRNA-203 (miR-203) is abnormally expressed in many human tumor tissues and significantly associated with the occurrence, development and clinical outcomes of human tumors. The aim of this study was to determine the target genes and functional significance of miR-203 in osteosarcoma cells. We found reduced expression of miR-203 in osteosarcoma tissues and cells (MG63 and U2-OS) compared with the adjacent normal tissues and normal osteoblastic cells (hFOB1.19), respectively...
May 15, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28525403/genetic-diseases-associated-with-an-increased-risk-of-skin-cancer-development-in-childhood
#13
Alexander L Fogel, Kavita Y Sarin, Joyce M C Teng
PURPOSE OF REVIEW: Childhood skin cancers are relatively rare and may indicate an underlying genetic disorder. The increasing elucidation of genetic pathways is changing the diagnosis and management of genetic skin cancer susceptibility syndromes. In this review, we provide an overview of genetic conditions that predispose to skin cancer development in childhood and signs that providers should assess when evaluating affected individuals. RECENT FINDINGS: In basal cell nevus syndrome (BCNS), the patched2 (PTCH2) and suppressor of fused (SUFU) genes have been implicated in disease pathogenesis...
May 18, 2017: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/28525377/dna-methylation-mediated-silencing-of-microrna-874-is-a-promising-diagnosis-and-prognostic-marker-in-breast-cancer
#14
Lei Zhang, Da-Li Yan, Fan Yang, Dan-Dan Wang, Xiu Chen, Jian-Zhong Wu, Jin-Hai Tang, Wen-Jie Xia
MicroRNA-874 (miR-874) is downregulated in several human cancers and has been suggested to be a tumor suppressor gene. However, the molecular mechanism of miR-874 downregulation in breast cancer has not been well elucidated. Here we aimed to study the aberrant hyper-methylation of CpG sites with the utility of miR-874 downreregulation in breast cancer and evaluate the clinical function of miR-874 as a prognostic marker. The miR-874 expressions in cells and tissues of two breast cancer lines were measured by real-time PCR...
May 2, 2017: Oncotarget
https://www.readbyqxmd.com/read/28524854/a-smad3-pten-regulatory-loop-controls-proliferation-and-apoptotic-responses-to-tgf-%C3%AE-in-mouse-endometrium
#15
Nuria Eritja, Isidre Felip, Mari Alba Dosil, Lucia Vigezzi, Cristina Mirantes, Andree Yeramian, Raúl Navaridas, Maria Santacana, David Llobet-Navas, Akihiko Yoshimura, Masatoshi Nomura, Mario Encinas, Xavier Matias-Guiu, Xavi Dolcet
The TGF-β/Smad and the PI3K/AKT signaling pathways are important regulators of proliferation and apoptosis, and their alterations lead to cancer development. TGF-β acts as a tumor suppressor in premalignant cells, but it is a tumor promoter for cancerous cells. Such dichotomous actions are dictated by different cellular contexts. Here, we have unveiled a PTEN-Smad3 regulatory loop that provides a new insight in the complex cross talk between TGF-β/Smad and PI3K/AKT signaling pathways. We demonstrate that TGF-β triggers apoptosis of wild-type polarized endometrial epithelial cells by a Smad3-dependent activation of PTEN transcription, which results in the inhibition of PI3K/AKT signaling pathway...
May 19, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28524356/association-between-yap-expression-in-neoplastic-and-non-neoplastic-breast-tissue-with-arsenic-urinary-levels
#16
Gladis Michel-Ramirez, Rogelio Recio-Vega, Guadalupe Ocampo-Gomez, Eduardo Palacios-Sanchez, Manuel Delgado-Macias, Manuel Delgado-Gaona, Robert Clark Lantz, Jay Gandolfi, Tania Gonzalez-Cortes
The Hippo pathway regulates cell proliferation and apoptosis and it has been noted that loss of critical components of this pathway can lead to uncontrolled cell growth. Yes-associated protein (YAP) is an important component of this Hippo pathway because YAP is the nuclear effector of the Hippo tumor suppressor pathway and it is crucial for the response to oxidative stress induced by cellular process and by different xenobiotics, including arsenic. It has been proposed that YAP dysregulation can contribute to a malignant cellular phenotype acting as both a tumor suppressor and an oncogene...
May 19, 2017: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/28524002/mirna-expression-in-bladder-cancer-and-their-potential-role-in-clinical-practice
#17
Ana Blanca, Liang Cheng, Rodolfo Montironi, Holger Moch, Francesco Massari, Michelangelo Fiorentino, Maria Rosaria Raspollini, Marina Scarpelli, Antonio Lopez-Beltran
To date more than 3000 miRNA sequences have been described in humans and reg¬istered at miRBase since their discovery. However, the functions of only a few of these miRNAs have been experimentally determined using deep sequencing technology. Aberrant miRNA expression has been associated with differentiation, invasion and metastasis in several cancers. In this context, recent reports have suggested that miRNAs play important roles in the regulation of target genes by binding to complementary regions of messenger transcripts to repress their translation or regulate degradation...
May 18, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/28523248/the-keap1-nrf2-system-in-cancer
#18
REVIEW
Keiko Taguchi, Masayuki Yamamoto
Cancer cells first adapt to the microenvironment and then propagate. Mutations in tumor suppressor genes or oncogenes are frequently found in cancer cells. Comprehensive genomic analyses have identified somatic mutations and other alterations in the KEAP1 or NRF2 genes and in well-known tumor suppressor genes or oncogenes, such as TP53, CDKN2A, PTEN, and PIK3CA, in various types of cancer. Aberrant NRF2 activation in cancer cells occurs through somatic mutations in the KEAP1 or NRF2 gene as well as through other mechanisms that disrupt the binding of KEAP1 to NRF2...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28522693/histone-h3-3k27m-represses-p16-to-accelerate-gliomagenesis-in-a-murine-model-of-dipg
#19
Francisco J Cordero, Zhiqing Huang, Carole Grenier, Xingyao He, Guo Hu, Roger E McLendon, Susan K Murphy, Rintaro Hashizume, Oren J Becher
Diffuse Intrinsic Pontine Glioma (DIPG) is a highly aggressive pediatric brainstem tumor genetically distinguished from adult GBM by the high prevalence of the K27M mutation in the histone H3 variant H3.3 (H3F3A). This mutation reprograms the H3K27me3 epigenetic landscape of DIPG by inhibiting the H3K27-specific histone methyltransferase EZH2. This globally reduces H3K27me2/3, critical repressive marks responsible for cell fate decisions, and also causes focal gain of H3K27me3 throughout the epigenome. To date the tumor-driving effects of H3...
May 18, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28522585/herpes-simplex-virus-glycoprotein-d-targets-a-specific-dendritic-cell-subset-and-improves-the-performance-of-vaccines-to-human-papillomavirus-associated-tumors
#20
Bruna F M M Porchia, Ana Carolina R Moreno, Rodrigo N Ramos, Mariana O Diniz, Laís Helena T M de Andrade, Daniela S Rosa, José Alexandre M Barbuto, Silvia B Boscardin, Luís Carlos S Ferreira
Cervical cancer is a major public health problem and one of the leading causes of cancer deaths in women. Virtually all cases of cervical cancer, as well as a growing share of anal and head/neck tumors, are associated with human papillomavirus (HPV) infection. Despite the effectiveness, the available prophylactic vaccines do not benefit women with cervical lesions or cancer. Therefore, the search of new immunotherapeutic approaches to treat HPV-induced tumors is still a priority. The present study characterizes a therapeutic antitumor vaccine based on the genetic fusion of the Herpes simplex virus-1 (HSV-1) glycoprotein D (gD) with the E7 oncoprotein from HPV-16 (gDE7)...
May 18, 2017: Molecular Cancer Therapeutics
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