alexa Study Of Alternative Wilms Tumor Gene Methylation As An Epigenetic Biomarker In Acute Myeloid Leukemia
ISSN: 2329-8936

Transcriptomics: Open Access
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2nd International Conference on Molecular Biology, Nucleic Acids & Molecular Medicine
August 31-September 01, 2017 Philadelphia, USA

Reham Abo Elwafa, Magdy El-Bordiny, Ashraf Al-Ghandour and Omneya Fayed
Alexandria University, Egypt
Posters & Accepted Abstracts: Transcriptomics
DOI: 10.4172/2329-8936-C1-013
Abstract
Background: Overexpression of the Wilms tumor 1 gene (WT1) is implicated in the prognosis of acute myeloid leukemia (AML) with high expression predicting disease progression, as well as being intensively studied as a potential molecular marker for minimal residual disease (MRD) and treatment response. Many different isoforms for WT1 are generated by alternative transcription initiation, mRNA splicing and alternative translation initiation. Recently, an alternative promoter incorporating a unique first exon, alternative WT1 transcript (AWT1), has been described. The AWT1 expression and the underlying epigenetic alterations associated with its expression in AML are still unknown. Objectives: We studied the AWT1 gene specific methylation changes and its relationship with other clinicopathological features. We also integrated the corresponding gene expression profile to explore the role of methylation in regulating gene expression. Materials & Methods: Bisulfite PCR followed by pyrosequencing were done to determine the methylation status of AWT1 gene promotor CPG islands in 50 newly diagnosed AML patients and 50 healthy subjects as a control group. The level of AWT1 expression was assessed using RQ-PCR. Results: AWT1 expression level was significantly higher in the AML patients in comparison to the control group (P<0.001) and it was surprising to find robust hypermethylation of the AWT1 promoter in AML patients compared to the controls (P<0.001). A statistically significant negative correlation between AWT1 expression and methylation level was found (r=0.67, P<0.001). At a cutoff value of 45.2% AWT1 promoter hypermethylation was found to be a highly specific marker for AML (specificity 95% and sensitivity 97.5%) Conclusion: We described an expression methylation signature of the AWT1 that are promising markers for diagnosis and MRD assessment in AML.
Biography

Reham Abo Elwafa is a Lecturer of Clinical Pathology, Faculty of Medicine in Alexandria University, Egypt. She has expertise in Research, Teaching and Administration in Hospital and Education Institution. She is expert in Molecular Techniques: PCR (conventional, and real time PCR), microarray, pyrosequencing and NGS in addition to FISH techniques including Prenatal Genetic Diagnosis (PGD) and flow cytometric immunophenotyping of different types of hematologic malignancies. She has several international publications in the field of Molecular Biology, Genetics and Epigenetics.

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