alexa Cryptic T(11;17) Is A Recurrent Translocation Resulting In NUP98-PHF23 Fusion That Shares Gene Expression Signaturesof NUP98-HOXA9 Fusion And Leukemic Stem Cells
ISSN: 2155-9864

Journal of Blood Disorders & Transfusion
Open Access

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2nd International Conference on Hematology & Blood Disorders
September 29-October 01, 2014 DoubleTree by Hilton Baltimore-BWI Airport, USA

Yi Ning, Hao Ho, Alvin Shi, Alyza Skaist, Aparna Pallavajjalla, Denise Batista and Sarah Wheelan
ScientificTracks Abstracts: J Blood Disorders Transf
DOI: 10.4172/2155-9864.S1.006
Abstract
Chromosome translocations are recurrent features of various types of hematological malignancies. These translocations produce specific fusion genes that play crucial roles in leukemogenesis. Translocations involving Nucleoporin 98 gene ( NUP98 ) have been found in a wide array of hematopoietic malignancies. Due to its participation in the formation of fusion with at least 30 different genes, NUP98 is considered to be one of the most promiscuous fusion partner genes. Although NUP98 fusions were initially considered to be infrequent events, application of fluorescence in situ hybridization (FISH) and microarray-based molecular cytogenetic analysis has revealed cryptic rearrangements involving NUP98. With application of molecular technology, a single NUP98 fusion ( NUP98-NDS1 ) was detected in 16.1% of pediatric AML with apparent normal karyotype and in 2.3% of adult AML with apparent normal karyotype. In a previous study a cryptic t(11;17) was identified resulting in NUP98-PHF23 fusion in a patient with AML. Expression of NUP98-PHF23 fusion gene cloned from this patient has led to the development of myeloid, erythroid, T-cell, and B-cell leukemia in mice. Recently, it wasfound that t(11;17) is a recurrent translocation in AML. RNA-seq was applied to characterize and compare the t(11;17) translocation breakpoints in the two AML patients and also to detect differentially expression genes that are common in both patients with NUP98-PHF23 fusion. It was found that NUP98-PHF23 fusion shares gene expression signatures of NUP98-HOXA9 fusion as well as leukemic stem cells.
Biography
Yi Ning is an American Board of Medical Genetics certified Cytogeneticist and an Associate Professor of Pathology in Johns Hopkins University. She earned her MD from Shanghai Medical University, Shanghai, China in 1984, and PhD from Baylor College of Medicine, Houston, Texas, in 1991. After completing her fellowship training in National Human Genome Research Institute, Bethesda, MD, she served as Director of Cytogenetics Lab at University of Maryland for 12 years. Currently she serves as Director of Cytogenetics Lab of Johns Hopkins Pathology providing cytogenetic diagnosis and conducting research to delineate molecular mechanisms of chromosome rearrangements in oncogenesis.
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