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Chen KJ, Huang JH, Shih JH, Gu DL, Lee SS, Shen R, Hsu YH, Kung YC, Wu CY, Ho CM, Jen HW, Lee HY, Lang YD, Hsiao CH, Jou YS. Somatic A-to-I RNA-edited RHOA isoform 2 specific-R176G mutation promotes tumor progression in lung adenocarcinoma. Mol Carcinog 2023; 62:348-359. [PMID: 36453714 PMCID: PMC10107479 DOI: 10.1002/mc.23490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 11/06/2022] [Accepted: 11/20/2022] [Indexed: 12/04/2022]
Abstract
Adenosine-to-inosine (A-to-I) RNA editing is the most common posttranscriptional editing to create somatic mutations and increase proteomic diversity. However, the functions of the edited mutations are largely underexplored. To identify novel targets in lung adenocarcinoma (LUAD), we conducted a genome-wide somatic A-to-I RNA editing analysis of 23 paired adjacent normal and LUAD transcriptomes and identified 26,280 events, including known nonsynonymous AZIN1-S367G and novel RHOAiso2 (RHOA isoform 2)-R176G, tubulin gamma complex associated protein 2 (TUBGCP2)-N211S, and RBMXL1-I40 M mutations. We validated the edited mutations in silico in multiple databases and in newly collected LUAD tissue pairs with the SEQUENOM MassARRAY® and TaqMan PCR Systems. We selected RHOAiso2-R176G due to its significant level, isoform-specificity, and being the most common somatic edited nonsynonymous mutation of RHOAiso2 to investigate its roles in LUAD tumorigenesis. RHOAiso2 is a ubiquitous but low-expression alternative spliced isoform received a unique Alu-rich exon at the 3' RHOA mRNA to become an editing RNA target, leading to somatic hypermutation and protein diversity. Interestingly, LUAD patients harboring the RHOAiso2-R176G mutation were associated with aberrant RHOA functions, cancer cell proliferation and migration, and poor clinical outcomes in transcriptome analysis. Mechanistically, RHOAiso2-R176G mutation-expressing LUAD cells potentiate RHOA-guanosine triphosphate (GTP) activity to phosphorylate ROCK1/2 effectors and enhance cell proliferation and migration in vitro and increase tumor growth in xenograft and systemic metastasis models in vivo. Taken together, the RHOAiso2-R176G mutation is a common somatic A-to-I edited mutation of the hypermutated RHOA isoform 2. It is an oncogenic and isoform-specific theranostic target that activates RHOA-GTP/p-ROCK1/2 signaling to promote tumor progression.
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Affiliation(s)
- Kuan-Ju Chen
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan.,Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Jing-Hsiang Huang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.,Department of Computer Science and Engineering, University of California at Santa Cruz, Santa Cruz, California, USA
| | - Jou-Ho Shih
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.,Genome and Systems Biology Degree Program, National Taiwan University and Academia Sinica, Taipei, Taiwan
| | - De-Leung Gu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Szu-Shuo Lee
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.,Program in Molecular Medicine, National Yang Ming Chiao Tung University and Academia Sinica, Taipei, Taiwan
| | - Roger Shen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.,Program in Molecular Medicine, National Yang Ming Chiao Tung University and Academia Sinica, Taipei, Taiwan
| | - Yu-Hsuan Hsu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.,Program in Molecular Medicine, National Yang Ming Chiao Tung University and Academia Sinica, Taipei, Taiwan
| | - Ying-Chih Kung
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Cheng-Yen Wu
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Chun-Ming Ho
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Hsin-Wei Jen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Hsin-Yi Lee
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan
| | - Yaw-Dong Lang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.,Cancer Progression Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Chen-Hao Hsiao
- Genome and Systems Biology Degree Program, National Taiwan University and Academia Sinica, Taipei, Taiwan.,Department of Surgery, Cheng Hsin General Hospital, Taipei, Taiwan
| | - Yuh-Shan Jou
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan.,Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.,Genome and Systems Biology Degree Program, National Taiwan University and Academia Sinica, Taipei, Taiwan.,Program in Molecular Medicine, National Yang Ming Chiao Tung University and Academia Sinica, Taipei, Taiwan
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Baranowski M, Surrente A, Klopotowski L, Urban JM, Zhang N, Maude DK, Wiwatowski K, Mackowski S, Kung YC, Dumcenco D, Kis A, Plochocka P. Probing the Interlayer Exciton Physics in a MoS 2/MoSe 2/MoS 2 van der Waals Heterostructure. Nano Lett 2017; 17:6360-6365. [PMID: 28895745 DOI: 10.1021/acs.nanolett.7b03184] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Stacking atomic monolayers of semiconducting transition metal dichalcogenides (TMDs) has emerged as an effective way to engineer their properties. In principle, the staggered band alignment of TMD heterostructures should result in the formation of interlayer excitons with long lifetimes and robust valley polarization. However, these features have been observed simultaneously only in MoSe2/WSe2 heterostructures. Here we report on the observation of long-lived interlayer exciton emission in a MoS2/MoSe2/MoS2 trilayer van der Waals heterostructure. The interlayer nature of the observed transition is confirmed by photoluminescence spectroscopy, as well as by analyzing the temporal, excitation power, and temperature dependence of the interlayer emission peak. The observed complex photoluminescence dynamics suggests the presence of quasi-degenerate momentum-direct and momentum-indirect bandgaps. We show that circularly polarized optical pumping results in long-lived valley polarization of interlayer exciton. Intriguingly, the interlayer exciton photoluminescence has helicity opposite to the excitation. Our results show that through a careful choice of the TMDs forming the van der Waals heterostructure it is possible to control the circular polarization of the interlayer exciton emission.
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Affiliation(s)
- M Baranowski
- Laboratoire National des Champs Magnétiques Intenses, CNRS-UGA-UPS-INSA , 143 avenue de Rangueil, 31400 Toulouse, France
- Department of Experimental Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology , Wybrzeze Wyspianskiego 27, 50-370 Wrocaw, Poland
| | - A Surrente
- Laboratoire National des Champs Magnétiques Intenses, CNRS-UGA-UPS-INSA , 143 avenue de Rangueil, 31400 Toulouse, France
| | - L Klopotowski
- Institute of Physics, Polish Academy of Sciences , al. Lotnikow 32/46, 02-668 Warsaw, Poland
| | - J M Urban
- Laboratoire National des Champs Magnétiques Intenses, CNRS-UGA-UPS-INSA , 143 avenue de Rangueil, 31400 Toulouse, France
| | - N Zhang
- Laboratoire National des Champs Magnétiques Intenses, CNRS-UGA-UPS-INSA , 143 avenue de Rangueil, 31400 Toulouse, France
| | - D K Maude
- Laboratoire National des Champs Magnétiques Intenses, CNRS-UGA-UPS-INSA , 143 avenue de Rangueil, 31400 Toulouse, France
| | - K Wiwatowski
- Faculty of Physics, Astronomy, and Informatics, Nicolaus Copernicus University , Grudziadzka 5, 87-100 Torun, Poland
| | - S Mackowski
- Faculty of Physics, Astronomy, and Informatics, Nicolaus Copernicus University , Grudziadzka 5, 87-100 Torun, Poland
| | - Y C Kung
- Electrical Engineering Institute and Institute of Materials Science and Engineering, École Polytechnique Fédérale de Lausanne , CH-1015 Lausanne, Switzerland
| | - D Dumcenco
- Electrical Engineering Institute and Institute of Materials Science and Engineering, École Polytechnique Fédérale de Lausanne , CH-1015 Lausanne, Switzerland
| | - A Kis
- Electrical Engineering Institute and Institute of Materials Science and Engineering, École Polytechnique Fédérale de Lausanne , CH-1015 Lausanne, Switzerland
| | - P Plochocka
- Laboratoire National des Champs Magnétiques Intenses, CNRS-UGA-UPS-INSA , 143 avenue de Rangueil, 31400 Toulouse, France
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Fan YJ, Wu YC, Chen Y, Kung YC, Wu TH, Huang KW, Sheen HJ, Chiou PY. Three dimensional microfluidics with embedded microball lenses for parallel and high throughput multicolor fluorescence detection. Biomicrofluidics 2013; 7:44121. [PMID: 24404054 PMCID: PMC3765297 DOI: 10.1063/1.4818944] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 08/07/2013] [Indexed: 05/11/2023]
Abstract
We report a 3D microfluidic device with 32 detection channels and 64 sheath flow channels and embedded microball lens array for high throughput multicolor fluorescence detection. A throughput of 358 400 cells/s has been accomplished. This device is realized by utilizing solid immersion micro ball lens arrays for high sensitivity and parallel fluorescence detection. High refractive index micro ball lenses (n = 2.1) are embedded underneath PDMS channels close to cell detection zones in channels. This design permits patterning high N.A. micro ball lenses in a compact fashion for parallel fluorescence detection on a small footprint device. This device also utilizes 3D microfluidic fabrication to address fluid routing issues in two-dimensional parallel sheath focusing and allows simultaneous pumping of 32 sample channels and 64 sheath flow channels with only two inlets.
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Affiliation(s)
- Y J Fan
- Mechanical and Aerospace Engineering Department, University of California Los Angeles, Los Angeles, California 90095, USA ; Institute of Applied Mechanics, National Taiwan University, Taipei 10617, Taiwan
| | - Y C Wu
- Mechanical and Aerospace Engineering Department, University of California Los Angeles, Los Angeles, California 90095, USA
| | - Y Chen
- Mechanical and Aerospace Engineering Department, University of California Los Angeles, Los Angeles, California 90095, USA
| | - Y C Kung
- Mechanical and Aerospace Engineering Department, University of California Los Angeles, Los Angeles, California 90095, USA
| | - T H Wu
- Mechanical and Aerospace Engineering Department, University of California Los Angeles, Los Angeles, California 90095, USA ; Department of Pathology and Laboratory Medicine, University of California Los Angeles, Los Angeles, California 90095, USA
| | - K W Huang
- Mechanical and Aerospace Engineering Department, University of California Los Angeles, Los Angeles, California 90095, USA
| | - H J Sheen
- Institute of Applied Mechanics, National Taiwan University, Taipei 10617, Taiwan
| | - P Y Chiou
- Mechanical and Aerospace Engineering Department, University of California Los Angeles, Los Angeles, California 90095, USA ; Department of Bioengineering, University of California Los Angeles, Los Angeles, California 90095, USA
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