Abstract
Mutations in spliceosome components have been implicated in carcinogenesis of various types of cancer. One of the most frequently found is U2AF1 S34F missense mutation. Functional analyses of this mutation have been largely limited to hematological malignancies although the mutation is also frequently seen in other cancer types including lung adenocarcinoma (LUAD). We examined the impact of knockdown (KD) of wild type (wt) U2AF1 and ectopic expression of two splice variant S34F mutant proteins in terms of alternative splicing (AS) pattern and cell cycle progression in A549 lung cancer cells. We demonstrate that induction of distinct AS events and disruption of mitosis at distinct sub-stages result from KD and ectopic expression of the mutant proteins. Importantly, when compared with the splicing pattern seen in LUAD patients with U2AF1 S34F mutation, ectopic expression of S34F mutants but not KD was shown to result in common AS events in several genes involved in cell cycle progression. Our study thus points to an active role of U2AF1 S34F mutant protein in inducing cell cycle dysregulation and mitotic stress. In addition, alternatively spliced genes which we describe here may represent novel potential markers of lung cancer development.
Original language | English |
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Pages (from-to) | 733-741 |
Number of pages | 9 |
Journal | Molecules and Cells |
Volume | 41 |
Issue number | 8 |
DOIs | |
State | Published - 2018 |
Bibliographical note
Funding Information:This research was supported by funding from the Ministry of Science and ICT via National Research Foundation, Republic of Korea (NRF-2013M3C7A1056562 to J. Kim; NRF-2015 K1A4A3047851 to S. Lee; NRF-2016R1A6A3A11932702 to Y. Jung).
Funding Information:
This research was supported by funding from the Ministry of Science and ICT via National Research Foundation, Republic of Korea (NRF-2013M3C7A1056562 to J. Kim; NRF-2015 K1A4A3047851 to S. Lee; NRF-2016R1A6A3A11932702 to
Publisher Copyright:
© The Korean Society for Molecular and Cellular Biology. All rights reserved.
Keywords
- Alternative splicing
- Lung adenocarcinoma
- Mitotic stress
- S34F
- U2AF1