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Marcin Braun, Agata Pastorczak, Wojciech Fendler, Joanna Madzio, Bartlomiej Tomasik, Joanna Taha, Marta Bielska, Lukasz Sedek, Tomasz Szczepanski, Michal Matysiak, Katarzyna Derwich, Monika Lejman, Jerzy Kowalczyk, Bernarda Kazanowska, Wanda Badowska, Jan Styczynski, Nina Irga-Jaworska, Joanna Trelinska, Beata Zalewska-Szewczyk, Filip Pierlejewski, Iwona Wlodarska, Wojciech Młynarski
The inactivation of tumor suppressor genes located within 9p21 locus (CDKN2A, CDKN2B) occurs in up to 30% of children with B-cell precursor acute lymphoblastic leukemia (BCP-ALL), but its independent prognostic significance remains controversial. In order to investigate the prognostic impact of deletions and promoter methylation within 9p21, 641 children with newly diagnosed BCP-ALL using methylation specific multiplex ligation-dependent probe amplification (MS-MLPA) were investigated. A total of 169 (26.4%) microdeletions in 9p21 were detected, of which 71 were homozygous...
October 18, 2016: Leukemia & Lymphoma
Graeme P Young, Susanne K Pedersen, Scott Mansfield, David H Murray, Rohan T Baker, Philippa Rabbitt, Susan Byrne, Libby Bambacas, Paul Hollington, Erin L Symonds
Recurrence will develop in 30-50% of colorectal cancer (CRC) cases despite apparent clearance following treatment. Carcinoembryonic antigen (CEA) is the only guideline-recommended blood test for monitoring cases for recurrence, but its sensitivity and specificity are suboptimal. This observational study compared a novel 2-gene (methylated BCAT1 and IKZF1 DNA) blood test with CEA for detection of recurrent CRC. We conducted a paired comparison of the BCAT1/IKZF1 test with CEA (cut-off 5 ng/mL) in blood from patients in remission after treatment for primary CRC and undergoing surveillance...
October 11, 2016: Cancer Medicine
A Dong, Y Y Wu, Y L Rao, W Li, R Tao, J Yan
No abstract text is available yet for this article.
September 14, 2016: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
Y-M Zhang, X-J Zhou, F-J Cheng, Y-Y Qi, P Hou, M-H Zhao, H Zhang
OBJECTIVES: Polymorphisms of IKAROS family zinc finger 1 (IKZF1) have been found to be associated with systemic lupus erythematosus (SLE) by genome-wide association studies (GWAS). The aim of the current study was to investigate the association between IKZF1 functional variants and lupus nephritis (LN) in a northern Han Chinese population and analyse their relationship with clinical and pathological phenotypes in LN. METHOD: The association between IKZF1 functional variants and LN was analysed for the lead variant rs1456896 with both GWAS and expression quantitative trait loci (eQTL) top hits in 500 LN patients and 500 healthy controls...
August 16, 2016: Scandinavian Journal of Rheumatology
Chandrika Gowda, Chunhua Song, Malika Kapadia, Jonathon L Payne, Tommy Hu, Yali Ding, Sinisa Dovat
The IKZF1 gene encodes the Ikaros protein, a zinc finger transcriptional factor that acts as a master regulator of hematopoiesis and a tumor suppressor in leukemia. Impaired activity of Ikaros is associated with the development of high-risk acute lymphoblastic leukemia (ALL) with a poor prognosis. The molecular mechanisms that regulate Ikaros' function as a tumor suppressor and regulator of cellular proliferation are not well understood. We demonstrated that Ikaros is a substrate for Casein Kinase II (CK2), an oncogenic kinase that is overexpressed in ALL...
September 18, 2016: Advances in Biological Regulation
Prerana Bhandari, Firoz Ahmad, Swarna Mandava, Bibhu Ranjan Das
BACKGROUND: Childhood acute lymphoblastic leukemia (ALL) is a heterogeneous genetic disease and its etiology remains poorly understood. Recent genome wide association and replication studies have highlighted specic polymorphisms contributing to childhood ALL predispositions mostly in European populations. It is unclear if these observations generalize to other populations with a lower incidence of ALL. The current case-control study evaluated variants in ARID5B (rs7089424, rs10821936), IKZF1 (rs4132601) and CEBPE (rs2239633) genes, which appear most significantly associated with risk of developing childhood B-lineage ALL...
2016: Asian Pacific Journal of Cancer Prevention: APJCP
Guillermo José Ruiz-Delgado, Yahveth Cantero-Fortiz, Andrés Aurelio León-Peña, Mónica León-González, Ana Karen Nuñez-Cortés, Guillermo José Ruiz-Argüelles
BACKGROUND: In B-cell acute lymphoblastic leukemia, one of the most frequent cytogenetic alterations is the presence of the Philadelphia chromosome. Recently, newly identified genetic alterations have been studied, among them the IKZF1 deletion. IKZF1 encodes IKAROS, a zinc finger protein that plays an important role in hematopoiesis involving the regulation process of adhesion, cellular migration, and as a tumor suppressor. OBJECTIVE: We aimed to study the impact of IKAROS deletion in the evolution and prognosis of B-cell acute lymphoblastic leukemia...
July 2016: Revista de Investigación Clínica; Organo del Hospital de Enfermedades de la Nutrición
Sawsen Besbes, Walid-Sabri Hamadou, Marie-Laure Boulland, Marie-Paule Lefranc, Yosra Ben Youssef, Béchir Achour, Abderrahim Khelif, Thierry Fest, Zohra Soua
INTRODUCTION: The monitoring of minimal residual disease (MRD) approach in patients diagnosed with B-acute lymphoblastic leukemia (B-ALL) allows an early detection of residual clones inducing relapses and therefore appropriate therapy strategy. The molecular markers may identify and quantify the residual blasts in B-ALL with normal cytology. In this study, we aimed to use combined IKZF1, IGH and IGK immunoglobulin genes for diagnosis and MRD monitoring in B-ALL sample using MLPA, multiplex PCR and real-time quantitative PCR...
September 7, 2016: Bulletin du Cancer
Ashwin Unnikrishnan, Yi F Guan, Yizhou Huang, Dominik Beck, Julie A I Thoms, Sofie Peirs, Kathy Knezevic, Shiyong Ma, Inge V de Walle, Ineke de Jong, Zara Ali, Ling Zhong, Mark J Raftery, Tom Taghon, Jonas Larsson, Karen L MacKenzie, Pieter V Vlierberghe, Jason W H Wong, John E Pimanda
Aberrant stem cell-like gene regulatory networks are a feature of leukaemogenesis. The ETS-related gene (ERG), an important regulator of normal haematopoiesis, is also highly expressed in T-ALL and acute myeloid leukaemia (AML). However, the transcriptional regulation of ERG in leukaemic cells remains poorly understood. In order to discover transcriptional regulators of ERG, we employed a quantitative mass spectrometry-based method to identify factors binding the 321 bp ERG +85 stem cell enhancer region in MOLT-4 T-ALL and KG-1 AML cells...
September 6, 2016: Nucleic Acids Research
Jonathan Bond, Renae Domaschenz, Mónica Roman-Trufero, Pierangela Sabbattini, Isabel Ferreiros-Vidal, Gareth Gerrard, Vahid Asnafi, Elizabeth Macintyre, Matthias Merkenschlager, Niall Dillon
Ikaros and Foxp1 are transcription factors that play key roles in normal lymphopoiesis and lymphoid malignancies. We describe a novel physical and functional interaction between the proteins, which requires the central zinc finger domain of Ikaros. The Ikaros-Foxp1 interaction is abolished by deletion of this region, which corresponds to the IK6 isoform that is commonly associated with high-risk acute lymphoblastic leukemia (ALL). We also identify the Gpr132 gene, which encodes the orphan G protein-coupled receptor G2A, as a novel target for Foxp1...
August 30, 2016: Oncotarget
Nour Abdulhay, Claudia Fiorini, Attila Kumánovics, Ashleigh A Sun, Jeannette Hansen-Rejali, Karl V Voelkerding, Sergio D Rosenzweig, Harry R Hill, Vijay G Sankaran
No abstract text is available yet for this article.
August 31, 2016: Blood
Stefanie Lindner, Jan Krönke
Thalidomide was sold in the 1950s as a sedative and was also used by pregnant women to treat morning sickness. It became notorious for causing severe birth defects and was removed from the market. More than four decades later, thalidomide had a renaissance in the treatment of cancer. Thalidomide and its more potent analogs, lenalidomide and pomalidomide, are nowadays approved treatments for multiple myeloma and myelodysplastic syndrome with deletion of chromosome 5q. In addition, thalidomide and its analogs inhibit release of tumor necrosis factor-α and increase interleukin-2 (IL-2) and interferon-γ release from T cells...
August 5, 2016: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
Volha Vshyukova, Alexander Meleshko, Natalia Mihal, Olga Aleinikova
•The case demonstrated a rare event of clonal heterogeneity by IKZF1 gene status in BCRABL1- ALL.•IKZF1 deletions are secondary events in ALL caused by clonal evolution during the treatment.•It's prognostic significance could be more crucial in BCR-ABL- rather than in BCR-ABL + ALL.•IKZF1 gene alterations may be determined and proved at the genome, expression and protein level.•IKZF1 deletions are suitable for MRD detection but not stable compared to Ig/TCR rearrangement.
2016: Leukemia Research Reports
Suresh Ambati, Ping Yu, Elizabeth C McKinney, Muthugapatti K Kandasamy, Diane Hartzell, Clifton A Baile, Richard B Meagher
BACKGROUND: Obesity-related comorbidities are thought to result from the reprogramming of the epigenome in numerous tissues and cell types, and in particular, mature adipocytes within visceral and subcutaneous adipose tissue, VAT and SAT. The cell-type specific chromatin remodeling of mature adipocytes within VAT and SAT is poorly understood, in part, because of the difficulties of isolating and manipulating large fragile mature adipocyte cells from adipose tissues. METHODS: We constructed MA-INTACT (Mature Adipocyte-Isolation of Nuclei TAgged in specific Cell Types) mice using the adiponectin (ADIPOQ) promoter (ADNp) to tag the surface of mature adipocyte nuclei with a reporter protein...
2016: BMC Obesity
Shiyang Li, Jennifer J Heller, John W Bostick, Aileen Lee, Hilde Schjerven, Philippe Kastner, Susan Chan, Zongming E Chen, Liang Zhou
Group 3 innate lymphoid cells (ILC3s) expressing the transcription factor (TF) RORγt are important for the defense and homeostasis of host intestinal tissues. The zinc finger TF Ikaros, encoded by Ikzf1, is essential for the development of RORγt(+) fetal lymphoid tissue inducer (LTi) cells and lymphoid organogenesis, but its role in postnatal ILC3s is unknown. Here, we show that small-intestinal ILC3s had lower Ikaros expression than ILC precursors and other ILC subsets. Ikaros inhibited ILC3s in a cell-intrinsic manner through zinc-finger-dependent inhibition of transcriptional activity of the aryl hydrocarbon receptor, a key regulator of ILC3 maintenance and function...
July 19, 2016: Immunity
Bruno Almeida Lopes, Claus Meyer, Thayana Conceição Barbosa, Udo Zur Stadt, Martin Horstmann, Nicola C Venn, Susan Heatley, Deborah L White, Rosemary Sutton, Maria S Pombo-de-Oliveira, Rolf Marschalek, Mariana Emerenciano
IKZF1 deletion (ΔIKZF1) is an important predictor of relapse in childhood B-cell precursor acute lymphoblastic leukemia. Because of its clinical importance, we previously mapped breakpoints of intragenic deletions and developed a multiplex PCR assay to detect recurrent intragenic ΔIKZF1. Since the multiplex PCR was not able to detect complete deletions (IKZF1 Δ1-8), which account for ~30% of all ΔIKZF1, we aimed at investigating the genomic scenery of IKZF1 Δ1-8. Six samples of cases with IKZF1 Δ1-8 were analyzed by microarray assay, which identified monosomy 7, isochromosome 7q, and large interstitial deletions presenting breakpoints within COBL gene...
July 13, 2016: Oncotarget
Yadan Wang, Xiaofei Wu, Jun Deng, Hao Yu, Ren Xu, Zhiyi Zhu, Shichun Tu, Yu Hu
The 8p11 myeloproliferative syndrome (EMS), also known as 8p11 myeloproliferative neoplasm (8p11 MPN), is a collection of rare hematologic malignancies that are associated with fusion genes involving the tyrosine kinase receptor gene FGFR1 in chromosome 8p11. The entity is an aggressive disease with a high rate of transformation to acute myeloid leukemia (AML) and pathologically characterized by its associated eosinophilia. In this study, we reported a distinctive EMS case featuring an in-frame ZMYM2-FGFR1 fusion gene identified by next-generation sequencing technology (NGS)...
August 2, 2016: Cancer Biology & Therapy
Zheng Ge, Yan Gu, Gang Zhao, Jianyong Li, Baoan Chen, Qi Han, Xing Guo, Juan Liu, Hui Li, Michael D Yu, Justin Olson, Sadie Steffens, Kimberly J Payne, Chunhua Song, Sinisa Dovat
Overexpression of cytokine receptor-like factor 2 (CRLF2) due to chromosomal rearrangement has been observed in acute lymphoblastic leukemia (ALL) and reported to contribute to oncogenesis and unfavorable outcome in ALL. We studied B-ALL and T-ALL patients without CRLF2 rearrangement and observed that CRLF2 is significantly increased in a subset of these patients. Our study shows that high CRLF2expression correlates with high-risk ALL markers, as well as poor survival. We found that the IKZF1-encoded protein, Ikaros, directly binds to the CRLF2 promoter and regulates CRLF2 expression in leukemia cells...
July 6, 2016: Oncotarget
Patrick Maffucci, Charles A Filion, Bertrand Boisson, Yuval Itan, Lei Shang, Jean-Laurent Casanova, Charlotte Cunningham-Rundles
Whole exome sequencing (WES) has proven an effective tool for the discovery of genetic defects in patients with primary immunodeficiencies (PIDs). However, success in dissecting the genetic etiology of common variable immunodeficiency (CVID) has been limited. We outline a practical framework for using WES to identify causative genetic defects in these subjects. WES was performed on 50 subjects diagnosed with CVID who had at least one of the following criteria: early onset, autoimmune/inflammatory manifestations, low B lymphocytes, and/or familial history of hypogammaglobulinemia...
2016: Frontiers in Immunology
Salman M Tajuddin, Ursula M Schick, John D Eicher, Nathalie Chami, Ayush Giri, Jennifer A Brody, W David Hill, Tim Kacprowski, Jin Li, Leo-Pekka Lyytikäinen, Ani Manichaikul, Evelin Mihailov, Michelle L O'Donoghue, Nathan Pankratz, Raha Pazoki, Linda M Polfus, Albert Vernon Smith, Claudia Schurmann, Caterina Vacchi-Suzzi, Dawn M Waterworth, Evangelos Evangelou, Lisa R Yanek, Amber Burt, Ming-Huei Chen, Frank J A van Rooij, James S Floyd, Andreas Greinacher, Tamara B Harris, Heather M Highland, Leslie A Lange, Yongmei Liu, Reedik Mägi, Mike A Nalls, Rasika A Mathias, Deborah A Nickerson, Kjell Nikus, John M Starr, Jean-Claude Tardif, Ioanna Tzoulaki, Digna R Velez Edwards, Lars Wallentin, Traci M Bartz, Lewis C Becker, Joshua C Denny, Laura M Raffield, John D Rioux, Nele Friedrich, Myriam Fornage, He Gao, Joel N Hirschhorn, David C M Liewald, Stephen S Rich, Andre Uitterlinden, Lisa Bastarache, Diane M Becker, Eric Boerwinkle, Simon de Denus, Erwin P Bottinger, Caroline Hayward, Albert Hofman, Georg Homuth, Ethan Lange, Lenore J Launer, Terho Lehtimäki, Yingchang Lu, Andres Metspalu, Chris J O'Donnell, Rakale C Quarells, Melissa Richard, Eric S Torstenson, Kent D Taylor, Anne-Claire Vergnaud, Alan B Zonderman, David R Crosslin, Ian J Deary, Marcus Dörr, Paul Elliott, Michele K Evans, Vilmundur Gudnason, Mika Kähönen, Bruce M Psaty, Jerome I Rotter, Andrew J Slater, Abbas Dehghan, Harvey D White, Santhi K Ganesh, Ruth J F Loos, Tõnu Esko, Nauder Faraday, James G Wilson, Mary Cushman, Andrew D Johnson, Todd L Edwards, Neil A Zakai, Guillaume Lettre, Alex P Reiner, Paul L Auer
White blood cells play diverse roles in innate and adaptive immunity. Genetic association analyses of phenotypic variation in circulating white blood cell (WBC) counts from large samples of otherwise healthy individuals can provide insights into genes and biologic pathways involved in production, differentiation, or clearance of particular WBC lineages (myeloid, lymphoid) and also potentially inform the genetic basis of autoimmune, allergic, and blood diseases. We performed an exome array-based meta-analysis of total WBC and subtype counts (neutrophils, monocytes, lymphocytes, basophils, and eosinophils) in a multi-ancestry discovery and replication sample of ∼157,622 individuals from 25 studies...
July 7, 2016: American Journal of Human Genetics
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