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https://www.readbyqxmd.com/read/28341738/higher-hopx-expression-is-associated-with-distinct-clinical-and-biological-features-and-predicts-poor-prognosis-in-de-novo-acute-myeloid-leukemia
#1
Chien-Chin Lin, Yueh-Chwen Hsu, Yi-Hung Li, Yuan-Yeh Kuo, Hsin-An Hou, Keng-Hsueh Lan, Tsung-Chih Chen, Yi-Shiuan Tzeng, Yi-Yi Kuo, Chein-Jun Kao, Po-Han Chuang, Mei-Hsuan Tseng, Yu-Chiao Chiu, Wen-Chien Chou, Hwei-Fang Tien
Homeodomain-only protein homeobox (HOPX) is the smallest homeodomain protein. It was regarded as a stem cell marker in several non-hematopoietic systems. While the prototypic homeobox genes such as HOX family have been well characterized in acute myeloid leukemia, the clinical and biological implications of HOPX in the disease remain unknown. Thus we analyzed HOPX and global gene expression patterns in 347 newly diagnosed de novo acute myeloid leukemia patients in our institute. We found that higher HOPX expression was closely associated with older age, higher platelet counts, lower white blood cell counts, lower lactate dehydrogenase levels, and mutations in RUNX1, IDH2, ASXL1, and DNMT3A, but negatively associated with acute promyelocytic leukemia, favorable karyotypes, CEBPA double mutations and NPM1 mutation...
March 24, 2017: Haematologica
https://www.readbyqxmd.com/read/28338653/breast-ductal-carcinoma-in-situ-carry-mutational-driver-events-representative-of-invasive-breast-cancer
#2
Jia-Min B Pang, Peter Savas, Andrew P Fellowes, Gisela Mir Arnau, Tanjina Kader, Ravikiran Vedururu, Chelsee Hewitt, Elena A Takano, David J Byrne, David Yh Choong, Ewan Ka Millar, C Soon Lee, Sandra A O'Toole, Sunil R Lakhani, Margaret C Cummings, G Bruce Mann, Ian G Campbell, Alexander Dobrovic, Sherene Loi, Kylie L Gorringe, Stephen B Fox
The spectrum of genomic alterations in ductal carcinoma in situ (DCIS) is relatively unexplored, but is likely to provide useful insights into its biology, its progression to invasive carcinoma and the risk of recurrence. DCIS (n=20) with a range of phenotypes was assessed by massively parallel sequencing for mutations and copy number alterations and variants validated by Sanger sequencing. PIK3CA mutations were identified in 11/20 (55%), TP53 mutations in 6/20 (30%), and GATA3 mutations in 9/20 (45%). Screening an additional 91 cases for GATA3 mutations identified a final frequency of 27% (30/111), with a high proportion of missense variants (8/30)...
March 24, 2017: Modern Pathology: An Official Journal of the United States and Canadian Academy of Pathology, Inc
https://www.readbyqxmd.com/read/28333137/the-mtor-signal-regulates-myeloid-derived-suppressor-cells-differentiation-and-immunosuppressive-function-in-acute-kidney-injury
#3
Chao Zhang, Shuo Wang, Jiawei Li, Weitao Zhang, Long Zheng, Cheng Yang, Tongyu Zhu, Ruiming Rong
The mammalian target of rapamycin (mTOR) signal controls innate and adaptive immune response in multiple immunoregulatory contexts. Myeloid-derived suppressor cells (MDSCs) are a heterogeneous population of myeloid cells of potent immunosuppressive capacity. In this study, we aimed to investigate the role of MDSCs in the protection of acute kidney injury (AKI) and the regulation of mTOR signal on MDSC's protective role in this context. In mice AKI model, rapamycin administration was associated with improved renal function, restored histological damage and decreased CD4(+) and CD8(+) T-cell infiltration in kidney tissue...
March 23, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28322996/assessing-the-mirna-sponge-potential-of-runx1t1-in-t-8-21-acute-myeloid-leukemia
#4
Alexander Junge, Roza Zandi, Jakob Hull Havgaard, Jan Gorodkin, Jack Bernard Cowland
t(8;21) acute myeloid leukemia (AML) is characterized by a translocation between chromosomes 8 and 21 and formation of a distinctive RUNX1-RUNX1T1 fusion transcript. This translocation places RUNX1T1 under control of the RUNX1 promoter leading to a pronounced upregulation of RUNX1T1 transcripts in t(8;21) AML, compared to normal hematopoietic cells. We investigated the role of highly-upregulated RUNX1T1 under the hypothesis that it acts as competing endogenous RNA (ceRNA) titrating microRNAs (miRNAs) away from their target transcripts and thus contributes to AML formation...
March 16, 2017: Gene
https://www.readbyqxmd.com/read/28322735/stella-collaborates-in-distinct-mesendodermal-cell-subpopulations-at-the-fetal-placental-interface-in-the-mouse-gastrula
#5
Adam D Wolfe, Adriana M Rodriguez, Karen M Downs
The allantois-derived umbilical component of the chorio-allantoic placenta shuttles fetal blood to and from the chorion, thereby ensuring fetal-maternal exchange. The progenitor populations that establish and supply the fetal-umbilical interface lie, in part, within the base of the allantois, where the germ line is claimed to segregate from the soma. Results of recent studies in the mouse have reported that STELLA (DPPA-3, PGC7) co-localizes with PRDM1 (BLIMP1), the bimolecular signature of putative primordial germ cells (PGCs) throughout the fetal-placental interface...
March 16, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28316598/t-cell-receptor-and-cytokine-signaling-can-function-at-different-stages-to-establish-and-maintain-transcriptional-memory-and-enable-t-helper-cell-differentiation
#6
REVIEW
Sarah L Bevington, Pierre Cauchy, David R Withers, Peter J L Lane, Peter N Cockerill
Experienced T cells exhibit immunological memory via a rapid recall response, responding to restimulation much faster than naïve T cells. The formation of immunological memory starts during an initial slow response, when naïve T cells become transformed to proliferating T blast cells, and inducible immune response genes are reprogrammed as active chromatin domains. We demonstrated that these active domains are supported by thousands of priming elements which cooperate with inducible transcriptional enhancers to enable efficient responses to stimuli...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28314106/runt-related-transcription-factor-1-regulates-lps-induced-acute-lung-injury-via-nf-%C3%AE%C2%BAb-signaling
#7
Xiaoju Tang, Ling Sun, Xiaodong Jin, Yifan Chen, Hui Zhu, Yasha Liang, Qingbo Wu, Xing Han, Jianing Liang, Xiaojing Liu, Zongan Liang, Gang Wang, Fengming Luo
RATIONALE: RUNX1, a transcription factor expressed in multiple organs, plays important roles in embryonic development and hematopoiesis. While RUNX1 is highly expressed in pulmonary tissues, its role in lung function and homeostasis are unknown. OBJECTIVES: To assess the role of RUNX1 in the lung development and inflammation after lipopolysaccharide challenge. METHODS: Expression of RUNX1 was assessed in human respiratory epithelial cells...
March 17, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28314085/targeted-next-generation-sequencing-and-identification-of-risk-factors-in-world-health-organization-defined-atypical-chronic-myeloid-leukemia
#8
Mrinal M Patnaik, Daniela Barraco, Terra L Lasho, Christy M Finke, Kaaren Reichard, Katherine P Hoversten, Rhett P Ketterling, Naseema Gangat, Ayalew Tefferi
Atypical chronic myeloid leukemia (aCML) is an aggressive myeloid neoplasm with overlapping features of myelodysplastic syndromes (prominent granulocytic dysplasia) and myeloproliferative neoplasms (neutrophilic leukocytosis). We studied 25 molecularly-annotated and World Health Organization defined aCML patients; median age 70 years, 84% males. Cytogenetic abnormalities were seen in 36% and gene mutations in 100%. Mutational frequencies were, ASXL1 28%, TET2 16%, NRAS 16%, SETBP1 12%, RUNX1 12%, ETNK1 8% and PTPN11 4%...
March 17, 2017: American Journal of Hematology
https://www.readbyqxmd.com/read/28304148/the-enigmatic-role-of-runx1-in-female-related-cancers-current-knowledge-future-perspectives
#9
REVIEW
Alessandra I Riggio, Karen Blyth
Historically associated with the aetiology of human leukaemia, the RUNX1 gene has in recent years reared its head in an assortment of epithelial cancers. This review discusses the state-of-the-art knowledge of the enigmatic role played by RUNX1 in female-related cancers of the breast, the uterus and the ovary. The weight of evidence accumulated so far is indicative of a very context-dependent role, as either an oncogene or a tumour suppressor. This is corroborated by high-throughput sequencing endeavours which report different genetic alterations affecting the gene, including amplification, deep deletion and mutations...
March 17, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28299675/a-regulatory-role-for-runx1-runx3-in-the-maintenance-of-genomic-integrity
#10
Vaidehi Krishnan, Yoshiaki Ito
All human cells are constantly attacked by endogenous and exogenous agents that damage the integrity of their genomes. Yet, the ensuing damage is mostly fixed and very rarely gives rise to genomic defects that promote cancer formation. This is due to the co-ordinated functioning of DNA repair proteins and checkpoint mechanisms that accurately detect and repair DNA damage to ensure genomic fitness. According to accumulating evidence, the RUNX family of transcription factors participate in the maintenance of genomic stability through transcriptional and non-transcriptional mechanisms...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28299673/roles-of-runx-in-hypoxia-induced-responses-and-angiogenesis
#11
Sun Hee Lee, Sarala Manandhar, You Mie Lee
During the past two decades, Runt domain transcription factors (RUNX1, 2, and 3) have been investigated in regard to their function, structural elements, genetic variants, and roles in normal development and pathological conditions. The Runt family proteins are evolutionarily conserved from Drosophila to mammals, emphasizing their physiological importance. A hypoxic microenvironment caused by insufficient blood supply is frequently observed in developing organs, growing tumors, and tissues that become ischemic due to impairment or blockage of blood vessels...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28299668/runx-genes-in-breast-cancer-and-the-mammary-lineage
#12
Nicholas Rooney, Alessandra I Riggio, Daniel Mendoza-Villanueva, Paul Shore, Ewan R Cameron, Karen Blyth
A full understanding of RUNX gene function in different epithelial lineages has been thwarted by the lethal phenotypes observed when constitutively knocking out these mammalian genes. However temporal expression of the Runx genes throughout the different phases of mammary gland development is indicative of a functional role in this tissue. A few studies have emerged describing how these genes impact on the fate of mammary epithelial cells by regulating lineage differentiation and stem/progenitor cell potential, with implications for the transformed state...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28299666/runx3-and-p53-how-two-tumor-suppressors-cooperate-against-oncogenic-ras
#13
Jung-Won Lee, Andre van Wijnen, Suk-Chul Bae
RUNX family members play pivotal roles in both normal development and neoplasia. In particular, RUNX1 and RUNX2 are essential for determination of the hematopoietic and osteogenic lineages, respectively. RUNX3 is involved in lineage determination of various types of epithelial cells. Analysis of mouse models and human cancer specimens revealed that RUNX3 acts as a tumor suppressor via multiple mechanisms. p53-related pathways play central roles in tumor suppression through the DNA damage response and oncogene surveillance, and RUNX3 is involved in both processes...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28299664/roles-of-runx-in-b-cell-immortalisation
#14
Michelle J West, Paul J Farrell
RUNX1 and RUNX3 are the main RUNX genes expressed in B lymphocytes. Both are expressed throughout B-cell development and play key roles at certain key developmental transitions. The tumour-associated Epstein-Barr virus (EBV) has potent B-cell transforming ability and manipulates RUNX3 and RUNX1 transcription through novel mechanisms to control B cell growth. In contrast to resting mature B cells where RUNX1 expression is high, in EBV-infected cells RUNX1 levels are low and RUNX3 levels are high. Downregulation of RUNX1 in these cells results from cross-regulation by RUNX3 and serves to relieve RUNX1-mediated growth repression...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28299663/runx1-and-cbf%C3%AE-mutations-and-activities-of-their-wild-type-alleles-in-aml
#15
R Katherine Hyde, Paul Liu, Alan D Friedman
Mutations in RUNX1 and CBFB have long been recognized as important in hematological malignancies. Point mutations and deletions of RUNX1 are frequently found in myelodysplastic syndrome, myeloproliferative disease, and acute myeloid leukemia. Germline mutations in RUNX1 are associated with familial platelet disorder with predisposition to AML. In addition, as will be discussed in other chapters, both RUNX1 and CBFB are involved in recurrent chromosomal rearrangements in leukemia. More recently, roles for the non-mutated RUNX1 and CBFB genes have been identified in multiple leukemia subtypes...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28299661/molecular-basis-and-targeted-inhibition-of-cbf%C3%AE-smmhc-acute-myeloid-leukemia
#16
Lucio H Castilla, John H Bushweller
Acute myeloid leukemia (AML) is characterized by recurrent chromosomal rearrangements that encode for fusion proteins which drive leukemia initiation and maintenance. The inv(16) (p13q22) rearrangement is a founding mutation and the associated CBFβ-SMMHC fusion protein is essential for the survival of inv(16) AML cells. This Chapter will discuss our understanding of the function of this fusion protein in disrupting hematopoietic homeostasis and creating pre-leukemic blasts, in its cooperation with other co-occurring mutations during leukemia initiation, and in leukemia maintenance...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28299660/etv6-runx1-acute-lymphoblastic-leukaemia-in-identical-twins
#17
Anthony M Ford, Mel Greaves
Acute leukaemia is the major subtype of paediatric cancer with a cumulative risk of 1 in 2000 for children up to the age of 15 years. Childhood acute lymphoblastic leukaemia (ALL) is a biologically and clinically diverse disease with distinctive subtypes; multiple chromosomal translocations exist within the subtypes and each carries its own prognostic relevance. The most common chromosome translocation observed is the t(12;21) that results in an in-frame fusion between the first five exons of ETV6 (TEL) and almost the entire coding region of RUNX1 (AML1)...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28299659/mechanism-of-etv6-runx1-leukemia
#18
Aishwarya Sundaresh, Owen Williams
The t(12;21)(p13;q22) translocation is the most frequently occurring single genetic abnormality in pediatric leukemia. This translocation results in the fusion of the ETV6 and RUNX1 genes. Since its discovery in the 1990s, the function of the ETV6-RUNX1 fusion gene has attracted intense interest. In this chapter, we will summarize current knowledge on the clinical significance of ETV6-RUNX1, the experimental models used to unravel its function in leukemogenesis, the identification of co-operating mutations and the mechanisms responsible for their acquisition, the function of the encoded transcription factor and finally, the future therapeutic approaches available to mitigate the associated disease...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28299658/clinical-relevance-of-runx1-and-cbfb-alterations-in-acute-myeloid-leukemia-and-other-hematological-disorders
#19
Klaus H Metzeler, Clara D Bloomfield
The translocation t(8;21), leading to a fusion between the RUNX1 gene and the RUNX1T1 locus, was the first chromosomal translocation identified in cancer. Since the first description of this balanced rearrangement in a patient with acute myeloid leukemia (AML) in 1973, RUNX1 translocations and point mutations have been found in various myeloid and lymphoid neoplasms. In this chapter, we summarize the currently available data on the clinical relevance of core binding factor gene alterations in hematological disorders...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28299657/runx1-eto-leukemia
#20
Shan Lin, James C Mulloy, Susumu Goyama
AML1-ETO leukemia is the most common cytogenetic subtype of acute myeloid leukemia, defined by the presence of t(8;21). Remarkable progress has been achieved in understanding the molecular pathogenesis of AML1-ETO leukemia. Proteomic surveies have shown that AML-ETO forms a stable complex with several transcription factors, including E proteins. Genome-wide transcriptome and ChIP-seq analyses have revealed the genes directly regulated by AML1-ETO, such as CEBPA. Several lines of evidence suggest that AML1-ETO suppresses endogenous DNA repair in cells to promote mutagenesis, which facilitates acquisition of cooperating secondary events...
2017: Advances in Experimental Medicine and Biology
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