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T Hoang, J A Lambert, R Martin
SCL, a transcription factor of the basic helix-loop-helix family, is a master regulator of hematopoiesis. Scl specifies lateral plate mesoderm to a hematopoietic fate and establishes boundaries by inhibiting the cardiac lineage. A combinatorial interaction between Scl and Vegfa/Flk1 sets in motion the first wave of primitive hematopoiesis. Subsequently, definitive hematopoietic stem cells (HSCs) emerge from the embryo proper via an endothelial-to-hematopoietic transition controlled by Runx1, acting with Scl and Gata2...
2016: Current Topics in Developmental Biology
Jing He, Wei Zhong, Jixiao Zeng, Jinhong Zhu, Ruizhong Zhang, Fenghua Wang, Tianyou Yang, Yan Zou, Huimin Xia
Neuroblastoma is one of the most commonly diagnosed extracranial solid tumors in infancy; however, the etiology of neuroblastoma remains largely unknown. Previous genome-wide association study (GWAS) indicated that several common genetic variations (rs110419 A > G, rs4758051 G > A, rs10840002 A > G and rs204938 A > G) in the LIM domain only 1 (LMO1) gene were associated with neuroblastoma susceptibility. The aim of this study was to evaluate the correlation between the four GWAS-identified LMO1 gene polymorphisms and neuroblastoma risk in a Southern Chinese population...
April 19, 2016: Oncotarget
Hui Gu, Tong Liu, Xinze Cai, Yuxin Tong, Yan Li, Chunyu Wang, Feng Li
After the publication of the article, the authors decided to add the following grants in the Acknowledgements section: This study was supported by grants from the National Natural Science Foundation of China (Nos. 81302221, 90813038, 31371424, 31171360 and 81372337), and Natural Science Foundation of Liaoning Province, China (No. 2013021090). [the original article was published in the International Journal of Oncology 47: 2181-2187, 2015; DOI: 10.3892/ijo.2015.3195].
March 2016: International Journal of Oncology
(no author information available yet)
A polymorphism in the LMO1 super-enhancer protects against neuroblastoma.
January 2016: Cancer Discovery
Derek A Oldridge, Andrew C Wood, Nina Weichert-Leahey, Ian Crimmins, Robyn Sussman, Cynthia Winter, Lee D McDaniel, Maura Diamond, Lori S Hart, Shizhen Zhu, Adam D Durbin, Brian J Abraham, Lars Anders, Lifeng Tian, Shile Zhang, Jun S Wei, Javed Khan, Kelli Bramlett, Nazneen Rahman, Mario Capasso, Achille Iolascon, Daniela S Gerhard, Jaime M Guidry Auvil, Richard A Young, Hakon Hakonarson, Sharon J Diskin, A Thomas Look, John M Maris
Neuroblastoma is a paediatric malignancy that typically arises in early childhood, and is derived from the developing sympathetic nervous system. Clinical phenotypes range from localized tumours with excellent outcomes to widely metastatic disease in which long-term survival is approximately 40% despite intensive therapy. A previous genome-wide association study identified common polymorphisms at the LMO1 gene locus that are highly associated with neuroblastoma susceptibility and oncogenic addiction to LMO1 in the tumour cells...
December 17, 2015: Nature
Hui Gu, Tong Liu, Xinze Cai, Yuxin Tong, Yan Li, Chunyu Wang, Feng Li
LMO1, a nuclear transcription coregulator, is implicated in the pathogenesis of T-cell acute lymphoblastic leukemia and neuroblastoma. However, the role of LMO1 in human prostate cancer (PCa) is still unknown. Androgen receptor (AR) plays a critical role in the progression of prostate cancer. The activation of AR signaling pathway could be modulated by AR cofactors. In the present study, we discovered that LMO1 could bind to AR and co-localize with AR in the nucleus. In addition, the expression of LMO1 in human PCa tissues was significantly higher than that in benign prostate hyperplasia (BPH) tissues...
December 2015: International Journal of Oncology
Jie Lu, Ping Chu, Huanmin Wang, Yaqiong Jin, Shujing Han, Wei Han, Jun Tai, Yongli Guo, Xin Ni
Neuroblastoma (NB) is the most common extra-cranial solid tumor in children and the most frequently diagnosed cancer in the first year of life. Previous genome-wide association studies (GWAS) of Caucasian and African populations have shown that common single nucleotide polymorphisms (SNPs) in several genes are associated with the risk of developing NB, while few studies have been performed on Chinese children. Herein, we examined the association between the genetic polymorphisms in candidate genes and the risk of NB in Chinese children...
2015: PloS One
Hans-Peter Schmitz, Arne Jendretzki, Janina Wittland, Johanna Wiechert, Jürgen J Heinisch
The exact function and regulation of the small GTPase Rho5, a putative homolog of mammalian Rac1, in the yeast Saccharomyces cerevisiae have not yet been elucidated. In a genetic screen initially designed to identify novel regulators of cell wall integrity signaling, we identified the homologs of mammalian DOCK1 (Dck1) and ELMO (Lmo1) as upstream components which regulate Rho5. Deletion mutants in any of the encoding genes (DCK1, LMO1, RHO5) showed hyper-resistance to cell wall stress agents, demonstrating a function in cell wall integrity signaling...
April 2015: Molecular Microbiology
Bastien Gerby, Cedric S Tremblay, Mathieu Tremblay, Shanti Rojas-Sutterlin, Sabine Herblot, Josée Hébert, Guy Sauvageau, Sébastien Lemieux, Eric Lécuyer, Diogo F T Veiga, Trang Hoang
The molecular determinants that render specific populations of normal cells susceptible to oncogenic reprogramming into self-renewing cancer stem cells are poorly understood. Here, we exploit T-cell acute lymphoblastic leukemia (T-ALL) as a model to define the critical initiating events in this disease. First, thymocytes that are reprogrammed by the SCL and LMO1 oncogenic transcription factors into self-renewing pre-leukemic stem cells (pre-LSCs) remain non-malignant, as evidenced by their capacities to generate functional T cells...
December 2014: PLoS Genetics
Aviya Goldshtein, Michael Berger
T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive malignancy of thymocytes. Despite significant improvement in the treatment of T-ALL, approximately 20% of children and most adults succumb to resistant or relapsed disease. Transformation events occur during crucial steps of thymocyte development and have been related to the expression of certain oncogenes such as TAL2, TLX1, LYL1, LMO1, and NOTCH1. Mutations that lead to constitutive activation of NOTCH1 are most commonly found in human patients with T-ALL...
2014: Critical Reviews in Oncogenesis
Feng Zhou, Shanmiao Gou, Jiongxin Xiong, Heshui Wu, Chunyou Wang, Tao Liu
The LIM proteins (Lhx1, Lhx2, Lhx3 and Lhx4) have been report to play important roles in human development. The function role of Lhxs have been characterized in various tumor tissues as cancer suppressors or promoters in different can status and types. The aim of present study was to clarify the function role of Lhx proteins in human pancreatic ductal adenocarcinoma (PDA). The gene expression profiles of Lhxs was evaluated using real-time quantitative reverse transcriptase-polymerase chain reaction (QRT-PCR) analysis and immunohistochemistry in human PDA tissues compared with normal pancreatic tissues, which identified the gene overexpression of Lhx2 in PDA...
December 2014: Molecular Biology Reports
Mario Capasso, Sharon Diskin, Flora Cimmino, Giovanni Acierno, Francesca Totaro, Giuseppe Petrosino, Lucia Pezone, Maura Diamond, Lee McDaniel, Hakon Hakonarson, Achille Iolascon, Marcella Devoto, John M Maris
The genetic etiology of sporadic neuroblastoma is still largely obscure. In a genome-wide association study, we identified single-nucleotide polymorphisms (SNP) associated with neuroblastoma at the CASC15, BARD1, LMO1, DUSP12, HSD17B12, HACE1, and LIN28B gene loci, but these explain only a small fraction of neuroblastoma heritability. Other neuroblastoma susceptibility genes are likely hidden among signals discarded by the multiple testing corrections. In this study, we evaluated eight additional genes selected as candidates for further study based on proven involvement in neuroblastoma differentiation...
December 1, 2014: Cancer Research
Diogo Veiga, Bastien Gerby, Trang Hoang
No abstract text is available yet for this article.
August 2014: Experimental Hematology
Bastien Gerby
No abstract text is available yet for this article.
August 2014: Experimental Hematology
Magali Humbert, Marie-Claude Sincennes, Benoît Grondin, André Haman, Mathieu Tremblay, Alain Verreault, Trang Hoang
No abstract text is available yet for this article.
August 2014: Experimental Hematology
Yue Zhang, Jili Yang, Jun Wang, Huaiyu Guo, Niancai Jing
Non-small cell lung cancer (NSCLC) is the leading cause of cancer mortality in the world. We report that one oncogene amplified on chromosome 3q26, LMO1, a master transcriptional regulator of stemness, operates to drive strong growth phenotype in NSCLC. We first validate gene expression changes of LMO genes by real-time quantitative RT-PCR real-time quantitative reverse transcriptase-polymerase chain reaction analysis and immunohistochemistry, and we identified gene overexpression of LMO1 compared with non-cancerous tissues (p < 0...
August 2014: Medical Oncology
Junguang Liu, Peiyun Yan, Niancai Jing, Jili Yang
Colorectal cancer (CRC) is the third leading cause of cancer mortality in the world. We report that one oncogene amplified on chromosome 3q26, LMO1, a master transcriptional regulator of stemness, operates to drive strong growth phenotype in CRC. The gene expression changes of LMO1 in human CRC tissues compared with noncancerous tissues were detected using real-time quantitative reverse transcriptase-polymerase chain reaction (QRT-PCR) analysis and immunohistochemistry, which identified the gene overexpression of LMO1 in CRC...
August 2014: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
Meixiang Sang, Li Ma, Meijie Sang, Xinliang Zhou, Wei Gao, Cuizhi Geng
The LIM-only subclass of LIM proteins is a family of nuclear transcription co-regulators that are characterized by the exclusive presence of two tandem LIM domains and no other functional domains. To date, four LIM-domain-only (LMO) proteins (LMO1-LMO4) have been identified. They regulate gene transcription by functioning as "linker" or "scaffolding" proteins with a remarkable potential to mediate protein-protein interactions. These proteins play important roles in cell fate determination, cell growth and differentiation, tissues patterning, and organ development...
February 2014: Molecular Biology Reports
Zeynep Kalender Atak, Valentina Gianfelici, Gert Hulselmans, Kim De Keersmaecker, Arun George Devasia, Ellen Geerdens, Nicole Mentens, Sabina Chiaretti, Kaat Durinck, Anne Uyttebroeck, Peter Vandenberghe, Iwona Wlodarska, Jacqueline Cloos, Robin Foà, Frank Speleman, Jan Cools, Stein Aerts
RNA-seq is a promising technology to re-sequence protein coding genes for the identification of single nucleotide variants (SNV), while simultaneously obtaining information on structural variations and gene expression perturbations. We asked whether RNA-seq is suitable for the detection of driver mutations in T-cell acute lymphoblastic leukemia (T-ALL). These leukemias are caused by a combination of gene fusions, over-expression of transcription factors and cooperative point mutations in oncogenes and tumor suppressor genes...
2013: PLoS Genetics
Kristie Lee, Tessa Mattiske, Kunio Kitamura, Jozef Gecz, Cheryl Shoubridge
Intellectual disability (ID) is a highly prevalent disorder that affects 1-3% of the population. The Aristaless-related homeobox gene (ARX) is a frequently mutated X-linked ID gene and encodes a transcription factor indispensable for proper forebrain, testis and pancreas development. Polyalanine expansions account for over half of all mutations in ARX and clinically give rise to a spectrum of ID and seizures. To understand how the polyalanine expansions cause the clinical phenotype, we studied mouse models of the two most frequent polyalanine expansion mutations (Arx((GCG)7) and Arx(432-455dup24))...
February 15, 2014: Human Molecular Genetics
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