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https://www.readbyqxmd.com/read/28380436/classification-of-pediatric-acute-myeloid-leukemia-based-on-mirna-expression-profiles
#1
Askar Obulkasim, Jenny E Katsman-Kuipers, Lonneke Verboon, Mathijs Sanders, Ivo Touw, Mojca Jongen-Lavrencic, Rob Pieters, C Michel Zwaan, Marry M van den Heuvel-Eibrink, Maarten Fornerod
Pediatric acute myeloid leukemia (AML) is a heterogeneous disease with respect to biology as well as outcome. In this study, we investigated whether known biological subgroups of pediatric AML are reflected by a common microRNA (miRNA) expression pattern. We assayed 665 miRNAs on 165 pediatric AML samples. First, unsupervised clustering was performed to identify patient clusters with common miRNA expression profiles. Our analysis unraveled 14 clusters, seven of which had a known (cyto-)genetic denominator. Finally, a robust classifier was constructed to discriminate six molecular aberration groups: 11q23-rearrangements, t(8;21)(q22;q22), inv(16)(p13q22), t(15;17)(q21;q22), NPM1 and CEBPA mutations...
March 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28341732/novel-recurrent-chromosomal-aberrations-detected-in-clonal-plasma-cells-of-light-chain-amyloidosis-patients-show-potential-adverse-prognostic-effect-first-results-from-a-genome-wide-copy-number-array-analysis
#2
Martin Granzow, Ute Hegenbart, Katrin Hinderhofer, Dirk Hose, Anja Seckinger, Tilmann Bochtler, Kari Hemminki, Hartmut Goldschmidt, Stefan O Schönland, Anna Jauch
Immunoglobulin light chain amyloidosis is a rare plasma cell dyscrasia characterized by deposition of abnormal amyloid fibrils in multiple organs impairing their function. In the largest cohort studied up to now of 118 CD138-purified plasma cell samples from previously untreated immunoglobulin light chain amyloidosis patients, we assessed in parallel copy number alterations using high-density copy number arrays and interphase fluorescence in situ hybridization. We used fluorescence in situ hybridization probes for the IgH translocations t(11;14), t(4;14), and t(14;16) or any other IgH rearrangement as well as numerical aberrations of the chromosome loci 1q21, 8p21, 5p15/5q35, 11q22...
March 24, 2017: Haematologica
https://www.readbyqxmd.com/read/28333413/extramedullary-leukemia-in-children-with-acute-myeloid-leukemia-a-population-based-cohort-study-from-the-nordic-society-of-pediatric-hematology-and-oncology-nopho
#3
Heidi Kristine Støve, Julie Damgaard Sandahl, Jonas Abrahamsson, Peter H Asdahl, Erik Forestier, Shau-Yin Ha, Kirsi Jahnukainen, Ólafur G Jónsson, Birgitte Lausen, Josefine Palle, Bernward Zeller, Henrik Hasle
BACKGROUND: The prognostic significance of extramedullary leukemia (EML) in childhood acute myeloid leukemia is not clarified. PROCEDURE: This population-based study included 315 children from the NOPHO-AML 2004 trial. RESULTS: At diagnosis, 73 (23%) patients had EML: 39 (12%) had myeloid sarcoma, 22 (7%) had central nervous system disease, and 12 (4%) had both. EML was associated with young age (median age: 2.6 years), a high white blood cell count (median: 40 × 10(9) /l), M5 morphology (40%), and 11q23/MLL (KMT2A) rearrangements (34%)...
March 23, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28257648/genetic-determinants-of-clinical-heterogeneity-of-the-coronary-artery-disease-in-the-population-of-hyderabad-india
#4
Rayabarapu Pranavchand, Arramraju Sreenivas Kumar, Battini Mohan Reddy
BACKGROUND: Genetic predisposition to the clinical categories of coronary artery disease (anatomical viz., insignificant, single, double, and triple vessel diseases and phenotypic severity categories viz., angina, acute coronary syndrome, and myocardial infarction) is poorly understood. Particularly, the apolipoprotein genes clustered at 11q23.3 chromosomal region play a vital role in cholesterol homeostasis, and a large number of SNPs identified in this region need to be explored for their association with the clinical categories of CAD...
March 4, 2017: Human Genomics
https://www.readbyqxmd.com/read/28254208/molecular-cytogenetic-characterization-of-jacobsen-syndrome-11q23-3-q25-deletion-in-a-fetus-associated-with-double-outlet-right-ventricle-hypoplastic-left-heart-syndrome-and-ductus-venosus-agenesis-on-prenatal-ultrasound
#5
Chih-Ping Chen, Liang-Kai Wang, Pei-Chen Wu, Tung-Yao Chang, Schu-Rern Chern, Peih-Shan Wu, Yen-Ni Chen, Shin-Wen Chen, Chen-Chi Lee, Chien-Wen Yang, Wayseen Wang
OBJECTIVE: We present molecular cytogenetic characterization of Jacobsen syndrome (11q23.3-q25 deletion) in a fetus associated with double outlet right ventricle (DORV), hypoplastic left heart syndrome (HLHS), and ductus venosus (DV) agenesis on prenatal ultrasound. CASE REPORT: A 26-year-old woman underwent prenatal ultrasound examination at 22 weeks of gestation, which revealed intrauterine growth restriction, short femurs, DORV, HLHS, DV agenesis, single umbilical artery, and curly fourth toe of the left foot...
February 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28253492/identification-of-a-cryptic-insertion-ins-11-x-q23-q28q12-resulting-in-a-kmt2a-flna-fusion-in-a-13-month-old-child-with-acute-myelomonocytic-leukemia
#6
Jana Lentes, Kathrin Thomay, Dominik T Schneider, Benedikt Bernbeck, Dirk Reinhardt, Rolf Marschalek, Claus Meyer, Brigitte Schlegelberger, Gudrun Göhring
In pediatric acute myeloid leukemia (AML), chromosomal abnormalities leading to a disruption of the lysine methyltransferase 2A (KMT2A) gene in 11q23 are the most frequent rearrangements. Here, we report on the identification of a novel cryptic insertion, ins(11;X)(q23;q28q12), resulting in a translocation of the KMT2A gene in 11q23, leading to a KMT2A-FLNA fusion in a 13-month-old boy with de novo acute myelomonocytic leukemia, who died 38 days after diagnosis. The patient presented a complex karyotype 48∼49,Y,del(X)(q12),+del(X)(q12),+8,ins(11;X)(q23; q28q12),+19...
2016: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/28236108/a-family-study-of-complex-chromosome-rearrangement-involving-chromosomes-1-8-and-11-and-its-reproductive-consequences
#7
Natalia Trpchevska, Ivanka Dimova, Tatyana Arabadji, Tanya Milachich, Svetlana Angelova, Magdalena Dimitrova, Mariela Hristova-Savova, Petya Andreeva, Tania Timeva, Atanas Shterev
Complex chromosome translocations are structural chromosomal rearrangements involving three or more chromosomes and more than two breakpoints. A complex chromosome rearrangement was detected in a phenotypically normal female patient that was referred to the hospital for genetic counseling due to reproductive failure. A cytogenetic evaluation was performed, according to standard method of chromosomal analysis, using G-banding technique. The patient's karyotype showed a balanced complex chromosome rearrangement (BCCR) involving chromosomes 1, 8, and 11 with three breakpoints 1p31, 8q13, and 11q23...
February 24, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28219220/-clinical-significance-of-expressions-of-evi1-and-bre-genes-in-47-acute-leukemia-patients-with-mll-rearrangement
#8
Y L Gong, J R Zhang, J Zhang, S X Bai, J N Cen, H J Shen, H Y Chou, S N Chen, J L Pan
Objective: To investigate the overexpression frequencies of BRE and EVI1, the correlation between BRE and EVI1 expressions and their possible clinical implications in 11q23/MLL rearrangement acute leukemia. Methods: Cytogenetic examination of bone marrow cells was performed by short-term culture method. R-banding technique was used for karyotype analysis. 47 patients were detected by interphase fluorescence in situ hybridization (FISH) with dual-color break apart MLL probe. The expressions of EVI1 and BRE genes were detected by real time quantitative reverse transcription polymerase chain reaction (RQ-PCR) ...
January 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/28195090/mixed-phenotypic-acute-leukemia-series-from-tertiary-care-center
#9
Ravikiran N Pawar, Sambhunath Banerjee, Subhajit Bramha, Shekhar Krishnan, Arpita Bhattacharya, Vaskar Saha, Anupam Chakrapani, Saurabh Bhave, Mammen Chandy, Reena Nair, Mayur Parihar, Neeraj Arora, D K Mishra
INTRODUCTION: Mixed-phenotype acute leukemias (MPALs) are a heterogeneous group of rare leukemias constituting approximately 2%-5% of all leukemias, in which assigning a single lineage of origin is not possible. They are diagnosed by either the presence of antigens of more than one lineage or by the presence of dual population of blasts belonging to two or more lineages. We highlight the clinicopathological, immunophenotype, and genetic data of a cohort (n = 14) of patients diagnosed and treated at our center...
January 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28165464/genome-wide-association-analysis-implicates-dysregulation-of-immunity-genes-in-chronic-lymphocytic-leukaemia
#10
Philip J Law, Sonja I Berndt, Helen E Speedy, Nicola J Camp, Georgina P Sava, Christine F Skibola, Amy Holroyd, Vijai Joseph, Nicola J Sunter, Alexandra Nieters, Silvia Bea, Alain Monnereau, David Martin-Garcia, Lynn R Goldin, Guillem Clot, Lauren R Teras, Inés Quintela, Brenda M Birmann, Sandrine Jayne, Wendy Cozen, Aneela Majid, Karin E Smedby, Qing Lan, Claire Dearden, Angela R Brooks-Wilson, Andrew G Hall, Mark P Purdue, Tryfonia Mainou-Fowler, Claire M Vajdic, Graham H Jackson, Pierluigi Cocco, Helen Marr, Yawei Zhang, Tongzhang Zheng, Graham G Giles, Charles Lawrence, Timothy G Call, Mark Liebow, Mads Melbye, Bengt Glimelius, Larry Mansouri, Martha Glenn, Karen Curtin, W Ryan Diver, Brian K Link, Lucia Conde, Paige M Bracci, Elizabeth A Holly, Rebecca D Jackson, Lesley F Tinker, Yolanda Benavente, Paolo Boffetta, Paul Brennan, Marc Maynadie, James McKay, Demetrius Albanes, Stephanie Weinstein, Zhaoming Wang, Neil E Caporaso, Lindsay M Morton, Richard K Severson, Elio Riboli, Paolo Vineis, Roel C H Vermeulen, Melissa C Southey, Roger L Milne, Jacqueline Clavel, Sabine Topka, John J Spinelli, Peter Kraft, Maria Grazia Ennas, Geoffrey Summerfield, Giovanni M Ferri, Robert J Harris, Lucia Miligi, Andrew R Pettitt, Kari E North, David J Allsup, Joseph F Fraumeni, James R Bailey, Kenneth Offit, Guy Pratt, Henrik Hjalgrim, Chris Pepper, Stephen J Chanock, Chris Fegan, Richard Rosenquist, Silvia de Sanjose, Angel Carracedo, Martin J S Dyer, Daniel Catovsky, Elias Campo, James R Cerhan, James M Allan, Nathanial Rothman, Richard Houlston, Susan Slager
Several chronic lymphocytic leukaemia (CLL) susceptibility loci have been reported; however, much of the heritable risk remains unidentified. Here we perform a meta-analysis of six genome-wide association studies, imputed using a merged reference panel of 1,000 Genomes and UK10K data, totalling 6,200 cases and 17,598 controls after replication. We identify nine risk loci at 1p36.11 (rs34676223, P=5.04 × 10(-13)), 1q42.13 (rs41271473, P=1.06 × 10(-10)), 4q24 (rs71597109, P=1.37 × 10(-10)), 4q35.1 (rs57214277, P=3...
February 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/28134081/detecting-novel-micro-rnas-in-rheumatoid-arthritis-with-gene-based-association-testing
#11
Aleksander Lenert, David W Fardo
OBJECTIVES: To identify novel risk genes by gene-based association analysis in rheumatoid arthritis (RA). METHODS: We performed gene-based association testing with GATES (Gene-based Association Test using Extended Simes procedure) to augment the power of genomewide-association study (GWAS) results from the largest meta-GWAS by Okada et al. in 14,361 RA cases and 43,923 controls of European ancestry using 8,694,488 SNPs. RESULTS: We identified 115 genes significantly associated with RA by gene-based association testing corresponding to 43 RA risk loci; 23 risk loci contained a single top risk gene, while 20 risk loci contained two or more risk genes...
January 27, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28114278/mll-af9-and-mll-af4-oncofusion-proteins-bind-a-distinct-enhancer-repertoire-and-target-the-runx1-program-in-11q23-acute-myeloid-leukemia
#12
K H M Prange, A Mandoli, T Kuznetsova, S-Y Wang, A M Sotoca, A E Marneth, B A van der Reijden, H G Stunnenberg, J H A Martens
In 11q23 leukemias, the N-terminal part of the mixed lineage leukemia (MLL) gene is fused to >60 different partner genes. In order to define a core set of MLL rearranged targets, we investigated the genome-wide binding of the MLL-AF9 and MLL-AF4 fusion proteins and associated epigenetic signatures in acute myeloid leukemia (AML) cell lines THP-1 and MV4-11. We uncovered both common as well as specific MLL-AF9 and MLL-AF4 target genes, which were all marked by H3K79me2, H3K27ac and H3K4me3. Apart from promoter binding, we also identified MLL-AF9 and MLL-AF4 binding at specific subsets of non-overlapping active distal regulatory elements...
January 23, 2017: Oncogene
https://www.readbyqxmd.com/read/28099933/loss-of-maternal-chromosome-11-is-a-signature-event-in-sdhaf2-sdhd-and-vhl-related-paragangliomas-but-less-significant-in-sdhb-related-paragangliomas
#13
Attje S Hoekstra, Erik F Hensen, Ekaterina S Jordanova, Esther Korpershoek, Anouk Na van der Horst-Schrivers, Cees Cornelisse, Eleonora P M Corssmit, Frederik J Hes, Jeroen C Jansen, Henricus P M Kunst, Henri J L M Timmers, Adrian Bateman, Diana Eccles, Judith V M G Bovée, Peter Devilee, Jean-Pierre Bayley
Germline mutations in the succinate dehydrogenase (SDHA, SDHB, SDHC, SDHD, SDHAF2) or Von Hippel-Lindau (VHL) genes cause hereditary paraganglioma/pheochromocytoma. While SDHB (1p36) and VHL (3p25) are associated with autosomal dominant disease, SDHD (11q23) and SDHAF2 (11q13) show a remarkable parent-of-origin effect whereby tumor formation is almost completely dependent on paternal transmission of the mutant allele. Loss of the entire maternal copy of chromosome 11 occurs frequently in SDHD-linked tumors, and has been suggested to be the basis for this typical inheritance pattern...
February 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28090486/therapy-related-myeloid-neoplasms-in-children-and-adolescents
#14
Hee Won Cho, Young Bae Choi, Eun Sang Yi, Ji Won Lee, Ki Woong Sung, Hong Hoe Koo, Keon Hee Yoo
BACKGROUND: This retrospective study aimed to characterize and analyze the outcome of therapy-related myeloid neoplasms (t-MNs) in children and adolescents. METHODS: The medical records of 16 patients under 21 years of age at the time of t-MN diagnosis were reviewed. RESULTS: The median patient age was 11.5 years (range, 1.6-20.4 yr). Twelve patients had therapy-related acute myeloid leukemia, 3 patients had myelodysplastic syndrome, and 1 patient had chronic myelomonocytic leukemia...
December 2016: Blood Research
https://www.readbyqxmd.com/read/28075445/a-clinical-and-molecular-analysis-of-a-patient-with-emanuel-syndrome
#15
Jin-Wen Luo, Huan Yang, Zhi-Ping Tan, Ming Tu, Hong Luo, Yi-Feng Yang, Li Xie
Emanuel syndrome (ES) is the most frequent type of recurrent non‑Robertsonian translocation that is characterized by numerous anomalies. Over 100 patients with ES have been described in the literature. The phenotype of this syndrome varies but often consists of facial dysmorphism, microcephaly, severe intellectual disability, developmental retardation, congenital heart disease and genital anomalies. The present study describes a 2‑year‑old boy with multiple malformations, including facial dysmorphism, severe intellectual disability, growth retardation, congenital heart disease, cleft lip and palate, genital malformation (micropenis), amblyopia, thymic dysplasia and hearing impairment...
March 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28056976/a-novel-approach-to-genome-wide-association-analysis-identifies-genetic-associations-with-primary-biliary-cholangitis-and-primary-sclerosing-cholangitis-in-polish-patients
#16
Agnieszka Paziewska, Andrzej Habior, Agnieszka Rogowska, Włodzimierz Zych, Krzysztof Goryca, Jakub Karczmarski, Michalina Dabrowska, Filip Ambrozkiewicz, Bozena Walewska-Zielecka, Marek Krawczyk, Halina Cichoz-Lach, Piotr Milkiewicz, Agnieszka Kowalik, Krzysztof Mucha, Joanna Raczynska, Joanna Musialik, Grzegorz Boryczka, Michal Wasilewicz, Irena Ciecko-Michalska, Malgorzata Ferenc, Maria Janiak, Alina Kanikowska, Rafal Stankiewicz, Marek Hartleb, Tomasz Mach, Marian Grzymislawski, Joanna Raszeja-Wyszomirska, Ewa Wunsch, Tomasz Bobinski, Michal Mikula, Jerzy Ostrowski
BACKGROUND: Primary biliary cholangitis (PBC) and primary sclerosing cholangitis (PSC) are forms of hepatic autoimmunity, and risk for both diseases has a strong genetic component. This study aimed to define the genetic architecture of PBC and PSC within the Polish population. METHODS: Subjects were 443 women with PBC, 120 patients with PSC, and 934 healthy controls recruited from Gastroenterology Departments in various Polish hospitals. Allelotyping employed a pooled-DNA sample-based genome-wide association study (GWAS) approach, using Illumina Human Omni2...
January 6, 2017: BMC Medical Genomics
https://www.readbyqxmd.com/read/28024519/-mechanism-of-a-new-dot1l-inhibitor-epz-5676-and-its-research-progress-review
#17
Li-Hong Li, Jing Wang, Xiao-Yan Ke
Leukemia carring translocation at the 11q23 locus is referred to MLL-rearranged (MLL-r) leukemia, and the occurrence of this genetic lesion is associated with a poor prognosis. The most common translocation chromosomes are chromosomes 4,9 and 10. Recently MLL protein was found to interact with DOT1L (DOT1-like) protein, which can promote leukemogenesis. A new DOT1L inhibitor EPZ-5676 can selectively inhibit proliferation, promote apoptosis and differentiation, which was also found to act synergistically with anti-AML (acute myeloid leukemia) and anti-ALL (acute lymphoblastic leukemia) drugs...
December 2016: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28017614/fto-plays-an-oncogenic-role-in-acute-myeloid-leukemia-as-a-n-6-methyladenosine-rna-demethylase
#18
Zejuan Li, Hengyou Weng, Rui Su, Xiaocheng Weng, Zhixiang Zuo, Chenying Li, Huilin Huang, Sigrid Nachtergaele, Lei Dong, Chao Hu, Xi Qin, Lichun Tang, Yungui Wang, Gia-Ming Hong, Hao Huang, Xiao Wang, Ping Chen, Sandeep Gurbuxani, Stephen Arnovitz, Yuanyuan Li, Shenglai Li, Jennifer Strong, Mary Beth Neilly, Richard A Larson, Xi Jiang, Pumin Zhang, Jie Jin, Chuan He, Jianjun Chen
N(6)-Methyladenosine (m(6)A) represents the most prevalent internal modification in mammalian mRNAs. Despite its functional importance in various fundamental bioprocesses, the studies of m(6)A in cancer have been limited. Here we show that FTO, as an m(6)A demethylase, plays a critical oncogenic role in acute myeloid leukemia (AML). FTO is highly expressed in AMLs with t(11q23)/MLL rearrangements, t(15;17)/PML-RARA, FLT3-ITD, and/or NPM1 mutations. FTO enhances leukemic oncogene-mediated cell transformation and leukemogenesis, and inhibits all-trans-retinoic acid (ATRA)-induced AML cell differentiation, through regulating expression of targets such as ASB2 and RARA by reducing m(6)A levels in these mRNA transcripts...
January 9, 2017: Cancer Cell
https://www.readbyqxmd.com/read/27995876/-evi1-expression-clinical-and-cytogenetical-characteristics-in-447-patients-with-acute-myeloid-leukemia
#19
X F He, Q R Wang, J N Cen, H Y Qiu, A N Sun, S N Chen, D P Wu
Objective: To investigate EVI1 expression and its associated clinical and cytogenetic characteristics in 447 acute myeloid leukemia (AML) patients. Methods: EVI1 expressions were measured in 447 AML cases from Jan. 2007 to Apr. 2015 to couple with clinical, cytogenetic and mutations' characteristics to summarize the features of AMLs with high EVI1 expression. Results: 17.9% of AML were high EVI1 expression (EVI1 (+)), and the remainder low EVI1 expression (EVI1(-)). No significant differences between the two groups in terms of age, sex, hemoglobin level, white blood cell count and platelet count were observed...
November 14, 2016: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
https://www.readbyqxmd.com/read/27870387/primary-myelofibrosis-2017-update-on-diagnosis-risk-stratification-and-management
#20
Ayalew Tefferi
Disease overview: Primary myelofibrosis (PMF) is a myeloproliferative neoplasm (MPN) characterized by stem cell-derived clonal myeloproliferation that is often but not always accompanied by JAK2, CALR or MPL mutation, abnormal cytokine expression, bone marrow fibrosis, anemia, splenomegaly, extramedullary hematopoiesis (EMH), constitutional symptoms, cachexia, leukemic progression and shortened survival. DIAGNOSIS: Diagnosis is based on bone marrow morphology. The presence of JAK2, CALR or MPL mutation is supportive but not essential for diagnosis; approximately 90% of patients carry one of these mutations and 10% are "triple-negative...
December 2016: American Journal of Hematology
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