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https://www.readbyqxmd.com/read/28651379/klf4-is-a-tumor-suppressor-in-anaplastic-meningioma-stem-like-cells-and-human-meningiomas
#1
Hailiang Tang, Xuanchun Wang, Hongda Zhu, Lingyang Hua, Jingrun Li, Qing Xie, Xiancheng Chen, Tao Zhang, Ye Gong
Meningiomas are the most common primary tumors in central nervous system. While recent studies have revealed genetic clues to lower grade human meningiomas, the molecular determinants driving the progression and recurrence of anaplastic meningioma, the most malignant subtype with a low prevalence but high morbidity, are still poorly understood. It has been proposed that high recurrence rates of malignant meningiomas are linked to cancer stem cells. Indeed, tumor stem-like cells have been isolated from various meningioma subtypes, but never been obtained from anaplastic meningioma...
June 26, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/28651234/microrna-493-suppresses-hepatocellular-carcinoma-tumorigenesis-through-down-regulation-of-anthrax-toxin-receptor-1-antxr1-and-r-spondin-2-rspo2
#2
Yuqiang Xu, Kuikui Ge, Junhao Lu, Jinjiang Huang, Wei Wei, Qingshan Huang
Hepatocellular carcinoma (HCC) is known as a highly prevalent cancer with a poor prognosis and short survival time, despite intensive research and clinical efforts. Increasing numbers of studies have reported that microRNAs are involved in the malignant behavior of hepatocellular carcinoma cells via directly targeting multiple oncogenes or tumor suppressors. Here, we report that the expression of microRNA-493 (miR-493) is decreased in HCC cell lines and in tumor tissues. Overexpression of miR-493 in HCC cells dramatically inhibited cell proliferation and colony-formation in vitro and inhibited tumor formation of HCC cell xenografts in vivo...
June 23, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28651105/heterogeneous-epigenetic-regulation-of-hace1-in-burkitt-lymphoma-derived-cells
#3
Abdelilah Bouzelfen, Hafid Kora, Marion Alcantara, Philippe Bertrand, Jean-Baptiste Latouche, Fabrice Jardin
We examined the consequences of 3-deazaneplanocin A (DZNep) on HACE1 expression in human Burkitt- Lymphoma-derived cells to investigate fundamental molecular mechanisms that control its expression. We treated the human Burkitt- Lymphoma-derived cells lines Ramos and Raji with DZNep and examined HACE1 mRNA expression by RT-PCR. We also studied the effect of DZNep on the methylation of lysine 9 and 27 of histone 3 (H3K27me3 and H3K9me2) associated with the CpG88 and CpG177 islands of the HACE1 promoters by chromatin immunoprecipitation and quantitative PCR...
June 16, 2017: Leukemia Research
https://www.readbyqxmd.com/read/28651018/meta-analysis-of-mirna-expression-profiles-for-prostate-cancer-recurrence-following-radical-prostatectomy
#4
Elnaz Pashaei, Elham Pashaei, Maryam Ahmady, Mustafa Ozen, Nizamettin Aydin
BACKGROUND: Prostate cancer (PCa) is a leading reason of death in men and the most diagnosed malignancies in the western countries at the present time. After radical prostatectomy (RP), nearly 30% of men develop clinical recurrence with high serum prostate-specific antigen levels. An important challenge in PCa research is to identify effective predictors of tumor recurrence. The molecular alterations in microRNAs are associated with PCa initiation and progression. Several miRNA microarray studies have been conducted in recurrence PCa, but the results vary among different studies...
2017: PloS One
https://www.readbyqxmd.com/read/28650662/glucose-restriction-combined-with-autophagy-inhibition-and-chemotherapy-in-hct-116-spheroids-decreases-cell-clonogenicity-and-viability-regulated-by-tumor-suppressor-genes
#5
Monica M Schroll, Gabriel J LaBonia, Katelyn R Ludwig, Amanda B Hummon
Drug resistance is a prevalent phenomenon that decreases the efficacy of cancer treatments and contributes to cancer progression and metastasis. Weakening drug resistant cancer cells prior to chemotherapy is a potential strategy to combat chemoresistance. One approach to damage resistant cancer cells is modulation of nutritional intake. The combination of nutrient restriction with targeted compound treatment results in pronounced molecular changes. This study provides valuable information about augmenting existing chemotherapeutic regimes with simultaneous glucose restriction and autophagy inhibition in colorectal cancer cells...
June 26, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28650469/a-compartmentalized-phosphoinositide-signaling-axis-at-cilia-is-regulated-by-inpp5e-to-maintain-cilia-and-promote-sonic-hedgehog-medulloblastoma
#6
S E Conduit, V Ramaswamy, M Remke, D N Watkins, B J Wainwright, M D Taylor, C A Mitchell, J M Dyson
Sonic Hedgehog (SHH) signaling at primary cilia drives the proliferation and progression of a subset of medulloblastomas, the most common malignant paediatric brain tumor. Severe side effects associated with conventional treatments and resistance to targeted therapies has led to the need for new strategies. SHH signaling is dependent on primary cilia for signal transduction suggesting the potential for cilia destabilizing mechanisms as a therapeutic target. INPP5E is an inositol polyphosphate 5-phosphatase that hydrolyses PtdIns(4,5)P2 and more potently, the phosphoinositide (PI) 3-kinase product PtdIns(3,4,5)P3...
June 26, 2017: Oncogene
https://www.readbyqxmd.com/read/28650339/ilc2-modulated-t-cell-to-mdsc-balance-is-associated-with-bladder-cancer-recurrence
#7
Mathieu F Chevalier, Sara Trabanelli, Julien Racle, Bérengère Salomé, Valérie Cesson, Dalila Gharbi, Perrine Bohner, Sonia Domingos-Pereira, Florence Dartiguenave, Anne-Sophie Fritschi, Daniel E Speiser, Cyrill A Rentsch, David Gfeller, Patrice Jichlinski, Denise Nardelli-Haefliger, Camilla Jandus, Laurent Derré
Non-muscle-invasive bladder cancer (NMIBC) is a highly recurrent tumor despite intravesical immunotherapy instillation with the bacillus Calmette-Guérin (BCG) vaccine. In a prospective longitudinal study, we took advantage of BCG instillations, which increase local immune infiltration, to characterize immune cell populations in the urine of patients with NMIBC as a surrogate for the bladder tumor microenvironment. We observed an infiltration of neutrophils, T cells, monocytic myeloid-derived suppressor cells (M-MDSCs), and group 2 innate lymphoid cells (ILC2)...
June 26, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28649645/a-functionally-significant-snp-in-tp53-and-breast-cancer-risk-in-african-american-women
#8
Maureen E Murphy, Song Liu, Song Yao, Dezheng Huo, Qin Liu, Sonia C Dolfi, Kim M Hirshfield, Chi-Chen Hong, Qiang Hu, Andrew F Olshan, Temidayo O Ogundiran, Clement Adebamowo, Susan M Domchek, Katherine L Nathanson, Barbara Nemesure, Stefan Ambs, William J Blot, Ye Feng, Esther M John, Leslie Bernstein, Wei Zheng, Jennifer J Hu, Regina G Ziegler, Sarah Nyante, Sue A Ingles, Michael F Press, Sandra L Deming, Jorge L Rodriguez-Gil, Christopher A Haiman, Olufunmilayo I Olopade, Kathryn L Lunetta, Julie R Palmer, Christine B Ambrosone
A coding region polymorphism exists in the TP53 gene (Pro47Ser; rs1800371) in individuals of African descent, which reduces p53 tumor suppressor function in a mouse model. It has been unclear whether this functionally significant polymorphism alters cancer risk in humans. This analysis included 6907 women with breast cancer and 7644 controls from the AMBER, ROOT, and AABC consortia. We used multivariable logistic regression to estimate associations between the TP53 Pro47Ser allele and overall breast cancer risk...
2017: NPJ Breast Cancer
https://www.readbyqxmd.com/read/28649178/hotair-a-key-regulator-in-gynecologic-cancers
#9
REVIEW
Jing Li, Jing Wang, Yan Zhong, Ruixia Guo, Danxia Chu, Haifeng Qiu, Zhongfu Yuan
Long non-coding RNAs (lncRNAs) play critical roles in the initiation and progression of human cancers. HOX transcript antisense RNA (HOTAIR) is an lncRNA localized to the mammalian HOXC gene cluster; it can interact with polycomb repressive complex 2 and the lysine-specific histone demethylase/CoREST/REST complex, and it manipulates the expression of various genes. HOTAIR promotes tumor invasion and metastasis by silencing tumor suppressors, and activating oncogenes and signaling pathways. HOTAIR is deregulated in many human cancers; despite its critical roles in health and disease, the underlying mechanisms governing HOTAIR function are unknown...
2017: Cancer Cell International
https://www.readbyqxmd.com/read/28648145/er-membrane-protein-complex-subunit-6-emc6-is-a-novel-tumor-suppressor-in-gastric-cancer
#10
Xiaokun Wang, Yan Xia, Chentong Xu, Xin Lin, Peng Xue, Shijie Zhu, Yun Bai, Yingyu Chen
Endoplasmic reticulum (ER) membrane protein complex subunit 6 (EMC6) is a novel human autophagy-related molecule. Here, using tissue microarray and immunohistochemistry, we report that EMC6 protein is lost or reduced in glandular cells of patients with gastric adenocarcinoma, compared to normal stomach mucosa. Overexpression of EMC6 in gastric cancer cells inhibited cell growth, migration, and invasion, and induced apoptosis and cell cycle arrest at S-phase. Further investigation suggested that EMC6 overexpression in BGC823 cells reduced tumorigenicity in a xenograft model, demonstrating that EMC6 has the characteristics of a tumor suppressor...
June 26, 2017: BMB Reports
https://www.readbyqxmd.com/read/28647701/aberrant-methylation-of-t-cadherin-can-be-a-diagnostic-biomarker-for-colorectal-cancer
#11
Bo-Shi Duan, Long-Fei Xie, Yue Wang
BACKGROUND/AIM: T-cadherin is a tumor suppressor gene, its predictive value in colorectal cancer (CRC) still remains controversial. In this study, we aimed to evaluate the association between T-cadherin promoter methylation and CRC by performing a meta-analysis. MATERIALS AND METHODS: The relevant literature was searched using the PubMed, Cochrane Library, Web of Science and Google Scholar databases for articles published until December 2016. The effect sizes were estimated by measuring an odds ratio (OR) with a 95% confidence interval (CI)...
July 2017: Cancer Genomics & Proteomics
https://www.readbyqxmd.com/read/28647672/therapeutic-targeting-of-nuclear-export-inhibition-in-lung-cancer
#12
Arjun Gupta, Jessica M Saltarski, Michael A White, Pier P Scaglioni, David E Gerber
Intracellular compartmentalization and trafficking of molecules plays a critical role in complex and essential cellular processes. In lung cancer and other malignancies, aberrant nucleocytoplasmic transport of tumor suppressor proteins and cell cycle regulators results in tumorigenesis and inactivation of apoptosis. Pharmacologic targeting of this process, termed selective inhibition of nuclear export (SINE), has demonstrated anti-tumor efficacy in preclinical models and human clinical trials. Exportin-1 (XPO1)-which serves as the sole exporter of several tumor suppressor proteins and cell cycle regulators, including retinoblastoma (Rb), adenomatous polyposis coli (APC), p53, p73, p21, p27, FOXO, STAT3, IKB, topoisomerase II and PAR-4-is the principal focus of SINE drug development...
June 21, 2017: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/28647344/oncogene-expressing-senescent-melanocytes-upregulate-mhc-class-ii-a-candidate-melanoma-suppressor-function
#13
John van Tuyn, Farah Jaber-Hijazi, Douglas MacKenzie, John J Cole, Elizabeth Mann, Jeff S Pawlikowski, Taranjit Singh Rai, David M Nelson, Tony McBryan, Andre Ivanov, Karen Blyth, Hong Wu, Simon Milling, Peter D Adams
On acquisition of an oncogenic mutation, primary human and mouse cells can enter oncogene-induced senescence (OIS). OIS is characterized by a stable proliferation arrest and secretion of pro-inflammatory cytokines and chemokines, the senescence-associated secretory phenotype (SASP). Proliferation arrest and the SASP collaborate to enact tumor suppression, the former by blocking cell proliferation and the latter by recruiting immune cells to clear damaged cells. However, the interactions of OIS cells with the immune system are still poorly defined...
June 21, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28646826/comparison-of-brca1-expression-between-triple-negative-and-luminal-breast-tumors
#14
Farzaneh Darbeheshti, Pantea Izadi, Amir Nader Emami Razavi, Mir Saeed Yekaninejad, Javad Tavakkoly Bazzaz
Background: Previous studies have suggested that BRCA1 dysregulation has a role in triple-negative phenotypic manifestation. However, differences of BRCA1 expression, as a tumor suppressor gene, have rarely been investigated between luminal and triple-negative breast tumors. Therefore, the present study attempted to compare the BRCA1 expression in triple-negative with luminal breast tumors and its association with the clinicopathologic characteristics of patients. Methods: BRCA1 expression was evaluated by real-time PCR in 26 triple-negative and 27 luminal breast tumors...
June 25, 2017: Iranian Biomedical Journal
https://www.readbyqxmd.com/read/28646148/mir-15b-5p-resensitizes-colon-cancer-cells-to-5-fluorouracil-by-promoting-apoptosis-via-the-nf-%C3%AE%C2%BAb-xiap-axis
#15
Ci Zhao, Qi Zhao, Chunhui Zhang, Guangyu Wang, Yuanfei Yao, Xiaoyi Huang, Fei Zhan, Yuanyuan Zhu, Jiaqi Shi, Jianan Chen, Feihu Yan, Yanqiao Zhang
Drug resistance, which is closely correlated with an imbalance in apoptosis, endows colorectal cancer (CRC) with enhanced progression capacity irrespective of the treatment with therapeutics. We report that miR-15b-5p is a tumor suppressor whose level is globally decreased in CRC cells and tissues. Over-expression of miR-15b-5p not only promoted 5-fluorouracil (5-FU)-induced cellular apoptosis but also reversed the chemoresistance of 5-FU in vitro and in vivo. As a key mediator of inflammation-induced cancer, miR-15b-5p enhances these therapeutic effects are mainly attributed to targeting of the NF-κB signaling pathway through negative regulation of NF-κB1 and one of its kinase complexes IKK-α...
June 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28646022/nf1-hematopoietic-cells-accelerate-malignant-peripheral-nerve-sheath-tumor-development-without-altering-chemotherapy-response
#16
Rebecca D Dodd, Chang-Lung Lee, Tess Overton, Wesley Huang, William C Eward, Lixia Luo, Yan Ma, Davis R Ingram, Keila E Torres, Diana M Cardona, Alexander Lazar, David G Kirsch
Haploinsufficiency in the tumor suppressor NF1 contributes to the pathobiology of type 1 neurofibromatosis, but a related role has not been established in malignant peripheral nerve sheath tumors (MPNST) where NF1 mutations also occur. Patients with NF1-associated MPNST appear to have worse outcomes than patients with sporadic MPNST, but the mechanism underlying this correlation is not understood. To define the impact of stromal genetics on the biology of this malignancy, we developed unique mouse models that reflect the genetics of patient-associated MPNST...
June 23, 2017: Cancer Research
https://www.readbyqxmd.com/read/28645738/human-germline-hedgehog-pathway-mutations-predispose-to-fatty-liver
#17
Maria J Guillen Sacoto, Ariel F Martinez, Yu Abe, Paul Kruszka, Karin Weiss, Joshua L Everson, Ramon Bataller, David E Kleiner, Jerrold M Ward, Kathleen K Sulik, Robert J Lipinski, Benjamin D Solomon, Maximilian Muenke
BACKGROUND & AIMS: Non-alcoholic fatty liver disease (NAFLD) is the most common form of liver disease. Activation of hedgehog (Hh) signaling has been implicated in the progression of NAFLD and proposed as a therapeutic target; however, the effects of Hh signaling inhibition have not been studied in humans with germline mutations affecting this pathway. METHODS: Patients with holoprosencephaly (HPE), a disorder associated with germline mutations disrupting Sonic hedgehog (SHH) signaling, were clinically evaluated for NAFLD...
June 20, 2017: Journal of Hepatology
https://www.readbyqxmd.com/read/28645112/tap63%C3%AE-and-%C3%AE-np63%C3%AE-are-regulated-by-rbm38-via-mrna-stability-and-have-an-opposing-function-in-growth-suppression
#18
Wensheng Yan, Yanhong Zhang, Xinbin Chen
The p63 gene is expressed as TAp63 from the P1 promoter and as ΔNp63 from the P2 promoter. Through alternative splicing, five TA and five ΔN isoforms (α-ε) are expressed. Isoforms α-β and δ share an identical 3' untranslated region (3'UTR) whereas isoform γ has a unique 3'UTR. Recently, we found that RBM38 RNA-binding protein is a target of p63 and RBM38 in turn regulates p63α/β expression via mRNA stability. However, it is uncertain whether p63γ has a unique biological activity and whether p63γ is regulated by RBM38...
June 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28645103/colxv-promotes-adipocyte-differentiation-via-inhibiting-dna-methylation-and-camp-pka-pathway-in-mice
#19
Guannv Liu, Meihang Li, Yatao Xu, Song Wu, Muhammad Saeed, Chao Sun
Extracellular matrix (ECM), as an essential component of adipose tissue, not only provides mechanical support for adipocyte growth, but also participates in ECM-adipocyte communication via various secreted proteins, including highly enriched collagens. Collagen XV (ColXV) is a secreted non-fibrillar collagen within ECM Basement Membrane (BM) zones and well recognized as a tumor suppressor. However, the role of ColXV in adipose tissue is still unknown. In this study, high fat diet (HFD) fed mice were used as obese model, in which we deeply investigated the interaction between ColXV and adipocyte differentiation or adipose metabolism...
June 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28644958/translating-cancer-epigenomics-into-the-clinic-focus-on-lung-cancer
#20
REVIEW
Josep Mari-Alexandre, Angel Diaz-Lagares, Maria Villalba, Oscar Juan, Ana B Crujeiras, Alfonso Calvo, Juan Sandoval
Epigenetic deregulation is increasingly being recognized as a hallmark of cancer. Recent studies have identified many new epigenetic biomarkers, some of which are being introduced into clinical practice for diagnosis, molecular classification, prognosis or prediction of response to therapies. O-6-methylguanine-DNA methyltransferase gene is the most clinically advanced epigenetic biomarker as it predicts the response to temozolomide and carmustine in gliomas. Therefore, epigenomics may represent a novel and promising tool for precision medicine, and in particular, the detection of epigenomic biomarkers in liquid biopsies will be of great interest for monitoring diseases in patients...
June 2, 2017: Translational Research: the Journal of Laboratory and Clinical Medicine
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