Research Papers:

RNA sequencing analyses reveal differentially expressed genes and pathways as Notch2 targets in B-cell lymphoma

Ashok Arasu, Pavithra Balakrishnan and Thirunavukkarasu Velusamy _

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Oncotarget. 2020; 11:4527-4540. https://doi.org/10.18632/oncotarget.27805

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Ashok Arasu1, Pavithra Balakrishnan1 and Thirunavukkarasu Velusamy1

1 Department of Biotechnology, School of Biotechnology and Genetic Engineering, Bharathiar University, Coimbatore, India

Correspondence to:

Thirunavukkarasu Velusamy,email: thirunavukkarasu@buc.edu.in

Keywords: SMZL; Notch2; RNA sequencing; PI3K/AKT; NF-kB

Received: August 04, 2020     Accepted: October 17, 2020     Published: December 01, 2020

Copyright: © 2020 Arasu et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Splenic marginal zone lymphoma (SMZL) is a low grade, indolent B-cell neoplasm that comprises approximately 10% of all lymphoma. Notch2, a pivotal gene for marginal zone differentiation is found to be mutated in SMZL. Deregulated Notch2 signaling has been involved in tumorigenesis and also in B-cell malignancies. However the role of Notch2 and the downstream pathways that it influences for development of B-cell lymphoma remains unclear. In recent years, RNA sequencing (RNA-Seq) has become a functional and convincing technology for profiling gene expression and to discover new genes and transcripts that are involved in disease development in a single experiment. In the present study, using transcriptome sequencing approach, we have identified key genes and pathways that are probably the underlying cause in the development of B-cell lymphoma. We have identified a total of 15,083 differentially expressed genes (DEGs) and 1067 differentially expressed transcripts (DETs) between control and Notch2 knockdown B cells. Gene Ontology (GO) term enrichment and pathway analysis were applied for the identification of key genes and pathways involved in development of B-cell lymphoma. In addition, intermediate genes of top canonical pathways such as PI3K/AKT and NF-kB were found to be downregulated with Notch2 knockdown, indicating that these pathways could be the putative downstream effectors through which Notch2 mediates its oncogenic effects. Taken collectively, the identified crop of genes and pathways may be considered as targets for the treatment of B-cell lymphoma.

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