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Integrative Profiling of Alternative Splicing Induced by U2AF1 S34F Mutation in Lung Adenocarcinoma Reveals a Mechanistic Link to Mitotic Stress

Title
Integrative Profiling of Alternative Splicing Induced by U2AF1 S34F Mutation in Lung Adenocarcinoma Reveals a Mechanistic Link to Mitotic Stress
Authors
Kim, SuyeonPark, CharnyJun, YukyungLee, SanghyukJung, YeonjooKim, Jaesang
Ewha Authors
이상혁김재상정연주
SCOPUS Author ID
이상혁scopus; 김재상scopus; 정연주scopus
Issue Date
2018
Journal Title
MOLECULES AND CELLS
ISSN
1016-8478JCR Link0219-1032JCR Link
Citation
vol. 41, no. 8, pp. 733 - 741
Keywords
alternative splicinglung adenocarcinomamitotic stressS34FU2AF1
Publisher
KOREAN SOC MOLECULAR & CELLULAR BIOLOGY
Indexed
SCI; SCIE; SCOPUS; KCI WOS
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.
DOI
10.14348/molcells.2018.0176
Appears in Collections:
자연과학대학 > 생명과학전공 > Journal papers
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