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Hare A, Zeng M, Rehemutula A, Su SK, Wang HF. Hsa-circ_0000064 accelerates the malignant progression of gastric cancer via sponging microRNA-621. Kaohsiung J Med Sci 2021; 37:841-850. [PMID: 34245111 DOI: 10.1002/kjm2.12419] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 06/02/2021] [Accepted: 06/07/2021] [Indexed: 12/25/2022] Open
Abstract
Gastric cancer (GC) is one of the most common digestive system tumors in the world. Many circular RNAs (circRNAs) are involved in the progression of GC. The purpose of this study was to delve into the expression characteristics and biological functions of circ_0000064 in GC, and further study its mechanisms. Quantitative real-time polymerase chain reaction (qRT-PCR) was performed to detect circ_0000064 expression in 61 GC tissues and cell lines. Circ_0000064 knockdown was successfully modeled with siRNA. The effects of circ_0000064 on the biological functions of GC cells were analyzed by CCK-8, BrdU, and Transwell assays. Bioinformatics and dual-luciferase reporter gene assay were adopted to explore the relations between circ_0000064 and microRNA-621 (miR-621). Western blot was used to examine the regulatory function of circ_0000064 and miR-621 on SYF2 pre-mRNA splicing factor 2. Cric_0000064 expression was elevated in GC tissues and cell lines. Knocking down cric_0000064 could inhibit the viability, migration, and invasion of GC cells. Dual-luciferase reporter gene assay showed that miR-621 could bind circ_0000064 and SYF2 3'UTR; in addition, miR-621 overexpression or SYF2 knockdown could partially weaken the cancer-promoting effect of circ_0000064 on GC cells. Circ_0000064 expression was negatively correlated with miR-621 expression in GC tissues while positively with SYF2 expression. Circ_0000064 can participate in the GC progression via modulating miR-621/SYF2 axis. This implies that circ_0000064 may be a new diagnosed biomarker or a new therapeutic target of GC.
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Affiliation(s)
- Ayiguli Hare
- Department of Chest and Abdominal Radiotherapy, Affiliated Tumor Hospital of Xinjiang Medical University, Xinjiang, Urumqi, China
| | - Min Zeng
- Department of Chest and Abdominal Radiotherapy, Affiliated Tumor Hospital of Xinjiang Medical University, Xinjiang, Urumqi, China
| | - Aizimaiti Rehemutula
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital of Xinjiang Medical University, Xinjiang, Urumqi, China
| | - Shi-Kun Su
- Department of Chest and Abdominal Radiotherapy, Affiliated Tumor Hospital of Xinjiang Medical University, Xinjiang, Urumqi, China
| | - Hai-Feng Wang
- Department of Chest and Abdominal Radiotherapy, Affiliated Tumor Hospital of Xinjiang Medical University, Xinjiang, Urumqi, China
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2
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Wang LP, Chen TY, Kang CK, Huang HP, Chen SL. BCAS2, a protein enriched in advanced prostate cancer, interacts with NBS1 to enhance DNA double-strand break repair. Br J Cancer 2020; 123:1796-1807. [PMID: 32963349 PMCID: PMC7723048 DOI: 10.1038/s41416-020-01086-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 08/21/2020] [Accepted: 09/03/2020] [Indexed: 12/30/2022] Open
Abstract
Background Breast cancer amplified sequence 2 (BCAS2) plays crucial roles in pre-mRNA splicing and androgen receptor transcription. Previous studies suggested that BCAS2 is involved in double-strand breaks (DSB); therefore, we aimed to characterise its mechanism and role in prostate cancer (PCa). Methods Western blotting and immunofluorescence microscopy were used to assay the roles of BCAS2 in the DSBs of PCa cells and apoptosis in Drosophila, respectively. The effect of BCAS2 dosage on non-homologous end joining (NHEJ) and homologous recombination (HR) were assayed by precise end-joining assay and flow cytometry, respectively. Glutathione-S-transferase pulldown and co-immunoprecipitation assays were used to determine whether and how BCAS2 interacts with NBS1. The expression of BCAS2 and other proteins in human PCa was determined by immunohistochemistry. Results BCAS2 helped repair radiation-induced DSBs efficiently in both human PCa cells and Drosophila. BCAS2 enhanced both NHEJ and HR, possibly by interacting with NBS1, which involved the BCAS2 N-terminus as well as both the NBS1 N- and C-termini. The overexpression of BCAS2 was significantly associated with higher Gleason and pathology grades and shorter survival in patients with PCa. Conclusion BCAS2 promotes two DSB repair pathways by interacting with NBS1, and it may affect PCa progression.
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Affiliation(s)
- Li-Po Wang
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Tzu-Yu Chen
- Graduate Institute of Medical Genomics and Proteomics, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Chun-Kai Kang
- Graduate Institute of Medical Genomics and Proteomics, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Hsiang-Po Huang
- Graduate Institute of Medical Genomics and Proteomics, College of Medicine, National Taiwan University, Taipei, Taiwan.
| | - Show-Li Chen
- Graduate Institute of Microbiology, College of Medicine, National Taiwan University, Taipei, Taiwan.
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3
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Tao Y, Zhao Y, Peng Y, Ma X, Sun C, Xu K. MicroRNA-621 inhibits the growth of gastric cancer cells by targeting SYF2. Arch Biochem Biophys 2020; 688:108406. [DOI: 10.1016/j.abb.2020.108406] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 05/05/2020] [Accepted: 05/06/2020] [Indexed: 02/07/2023]
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4
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Tanaka I, Chakraborty A, Saulnier O, Benoit-Pilven C, Vacher S, Labiod D, Lam EWF, Bièche I, Delattre O, Pouzoulet F, Auboeuf D, Vagner S, Dutertre M. ZRANB2 and SYF2-mediated splicing programs converging on ECT2 are involved in breast cancer cell resistance to doxorubicin. Nucleic Acids Res 2020; 48:2676-2693. [PMID: 31943118 PMCID: PMC7049692 DOI: 10.1093/nar/gkz1213] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 12/09/2019] [Accepted: 12/17/2019] [Indexed: 12/16/2022] Open
Abstract
Besides analyses of specific alternative splicing (AS) variants, little is known about AS regulatory pathways and programs involved in anticancer drug resistance. Doxorubicin is widely used in breast cancer chemotherapy. Here, we identified 1723 AS events and 41 splicing factors regulated in a breast cancer cell model of acquired resistance to doxorubicin. An RNAi screen on splicing factors identified the little studied ZRANB2 and SYF2, whose depletion partially reversed doxorubicin resistance. By RNAi and RNA-seq in resistant cells, we found that the AS programs controlled by ZRANB2 and SYF2 were enriched in resistance-associated AS events, and converged on the ECT2 splice variant including exon 5 (ECT2-Ex5+). Both ZRANB2 and SYF2 were found associated with ECT2 pre-messenger RNA, and ECT2-Ex5+ isoform depletion reduced doxorubicin resistance. Following doxorubicin treatment, resistant cells accumulated in S phase, which partially depended on ZRANB2, SYF2 and the ECT2-Ex5+ isoform. Finally, doxorubicin combination with an oligonucleotide inhibiting ECT2-Ex5 inclusion reduced doxorubicin-resistant tumor growth in mouse xenografts, and high ECT2-Ex5 inclusion levels were associated with bad prognosis in breast cancer treated with chemotherapy. Altogether, our data identify AS programs controlled by ZRANB2 and SYF2 and converging on ECT2, that participate to breast cancer cell resistance to doxorubicin.
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Affiliation(s)
- Iris Tanaka
- Institut Curie, PSL Research University, CNRS UMR 3348, F-91405 Orsay, France
- Paris Sud University, Paris-Saclay University, CNRS UMR 3348, F-91405 Orsay, France
- Equipe Labellisée Ligue Contre le Cancer
| | - Alina Chakraborty
- Institut Curie, PSL Research University, CNRS UMR 3348, F-91405 Orsay, France
- Paris Sud University, Paris-Saclay University, CNRS UMR 3348, F-91405 Orsay, France
- Equipe Labellisée Ligue Contre le Cancer
| | - Olivier Saulnier
- Institut Curie Research Center, SIREDO Oncology Center, Paris-Sciences-Lettres Research University, INSERM U830, Laboratory of Biology and Genetics of Cancers, Paris, France; Université Paris Diderot, Sorbonne Paris Cité, France
| | | | - Sophie Vacher
- Unité de Pharmacogénomique, Service de génétique, Institut Curie, Paris, France; Université Paris Descartes, Paris, France
| | - Dalila Labiod
- Paris Sud University, Paris-Saclay University, CNRS UMR 3348, F-91405 Orsay, France
- Institut Curie, PSL Research University, Translational Research Department, Experimental Radiotherapy Platform, Orsay, France
| | | | - Ivan Bièche
- Unité de Pharmacogénomique, Service de génétique, Institut Curie, Paris, France; Université Paris Descartes, Paris, France
| | - Olivier Delattre
- Institut Curie Research Center, SIREDO Oncology Center, Paris-Sciences-Lettres Research University, INSERM U830, Laboratory of Biology and Genetics of Cancers, Paris, France; Université Paris Diderot, Sorbonne Paris Cité, France
| | - Frédéric Pouzoulet
- Paris Sud University, Paris-Saclay University, CNRS UMR 3348, F-91405 Orsay, France
- Institut Curie, PSL Research University, Translational Research Department, Experimental Radiotherapy Platform, Orsay, France
| | - Didier Auboeuf
- CNRS UMR 5239, Ecole Normale Supérieure de Lyon, Lyon, France
| | - Stéphan Vagner
- Institut Curie, PSL Research University, CNRS UMR 3348, F-91405 Orsay, France
- Paris Sud University, Paris-Saclay University, CNRS UMR 3348, F-91405 Orsay, France
- Equipe Labellisée Ligue Contre le Cancer
| | - Martin Dutertre
- Institut Curie, PSL Research University, CNRS UMR 3348, F-91405 Orsay, France
- Paris Sud University, Paris-Saclay University, CNRS UMR 3348, F-91405 Orsay, France
- Equipe Labellisée Ligue Contre le Cancer
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5
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Tian Y, Chen MX, Yang JF, Achala HHK, Gao B, Hao GF, Yang GF, Dian ZY, Hu QJ, Zhang D, Zhang J, Liu YG. Genome-wide identification and functional analysis of the splicing component SYF2/NTC31/p29 across different plant species. PLANTA 2019; 249:583-600. [PMID: 30317439 DOI: 10.1007/s00425-018-3026-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 10/04/2018] [Indexed: 06/08/2023]
Abstract
This study systematically identifies plant SYF2/NTC31/p29 genes from 62 plant species by a combinatory bioinformatics approach, revealing the importance of this gene family in phylogenetics, duplication, transcriptional, and post-transcriptional regulation. Alternative splicing is a post-transcriptional regulatory mechanism, which is critical for plant development and stress responses. The entire process is strictly attenuated by a complex of splicing-related proteins, designated splicing factors. Human p29, also referred to as synthetic lethal with cdc forty 2 (SYF2) or the NineTeen complex 31 (NTC31), is a core protein found in the NTC complex of humans and yeast. This splicing factor participates in a variety of biological processes, including DNA damage repair, control of the cell cycle, splicing, and tumorigenesis. However, its function in plants has been seldom reported. Thus, we have systematically identified 89 putative plant SYF2s from 62 plant species among the deposited entries in the Phytozome database. The phylogenetic relationships and evolutionary history among these plant SYF2s were carefully examined. The results revealed that plant SYF2s exhibited distinct patterns regarding their gene structure, promoter sequences, and expression levels, suggesting their functional diversity in response to developmental cues or stress treatments. Although local duplication events, such as tandem duplication and retrotransposition, were found among several plant species, most of the plant species contained only one copy of SYF2, suggesting the existence of additional mechanisms to confer duplication resistance. Further investigation using the model dicot and monocot representatives Arabidopsis and rice SYF2s indicated that the splicing pattern and resulting protein isoforms might play an alternative role in the functional diversity.
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Affiliation(s)
- Yuan Tian
- State Key Laboratory of Crop Biology, College of Life Science, Shandong Agricultural University, Taian, Shandong, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
| | - Mo-Xian Chen
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Jing-Fang Yang
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - H H K Achala
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Bei Gao
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Ge-Fei Hao
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | - Guang-Fu Yang
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, Wuhan, 430079, China
| | | | - Qi-Juan Hu
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
| | - Di Zhang
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Jianhua Zhang
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China.
- Department of Biology, Hong Kong Baptist University and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Shatin, Hong Kong.
| | - Ying-Gao Liu
- State Key Laboratory of Crop Biology, College of Life Science, Shandong Agricultural University, Taian, Shandong, China.
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Shi F, Cai FF, Cai L, Lin XY, Zhang W, Wang QQ, Zhao YJ, Ni QC, Wang H, He ZX. Overexpression of SYF2 promotes cell proliferation and correlates with poor prognosis in human breast cancer. Oncotarget 2017; 8:88453-88463. [PMID: 29179448 PMCID: PMC5687618 DOI: 10.18632/oncotarget.18188] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 03/30/2017] [Indexed: 12/11/2022] Open
Abstract
SYF2, a known cell cycle regulator, is reported to be involved in cell cycle arrest by interacting with cyclin-D-type binding protein 1. In the present study, we investigated the role of SYF2 in human breast cancer (BC) progression. SYF2 was highly upregulated in BC tissues and cell lines, as per Western blot and immunohistochemistry analysis. The SYF2 expression level had a significant correlation with the tumor grade and Ki-67 expression. In vitro starvation-refeeding experiment and SYF2-siRNA transfection assay demonstrated that SYF2 could promote proliferation of BC cells, while SYF2 knockdown resulted in cells cycle arrest at G1/S phase, reducing the cell growth rate of BC cells. These results indicated that SYF2 promotes human BC progression by accelerating the BC cells’ proliferation. SYF2 could be a novel therapeutic target in human BC therapies.
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Affiliation(s)
- Feng Shi
- Department of General Surgery, Affiliated Hospital of Nantong University, Nantong University, Nantong, PR China
| | - Feng-Feng Cai
- Department of Breast Surgery, Yangpu Hospital, Tongji University School of Medicine, Shanghai, PR China
| | - Lu Cai
- Department of Breast Surgery, Yangpu Hospital, Tongji University School of Medicine, Shanghai, PR China
| | - Xiao-Yan Lin
- Department of Breast Surgery, Yangpu Hospital, Tongji University School of Medicine, Shanghai, PR China
| | - Wei Zhang
- Department of General Surgery, Affiliated Hospital of Nantong University, Nantong University, Nantong, PR China
| | - Qin-Qin Wang
- Department of General Surgery, Affiliated Hospital of Nantong University, Nantong University, Nantong, PR China
| | - Yu-Jie Zhao
- Department of General Surgery, Affiliated Hospital of Nantong University, Nantong University, Nantong, PR China
| | - Qi-Chao Ni
- Department of General Surgery, Affiliated Hospital of Nantong University, Nantong University, Nantong, PR China
| | - Hua Wang
- Department of General Surgery, Affiliated Hospital of Nantong University, Nantong University, Nantong, PR China
| | - Zhi-Xian He
- Department of General Surgery, Affiliated Hospital of Nantong University, Nantong University, Nantong, PR China
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7
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Zhang S, Shi W, Chen Y, Xu Z, Zhu J, Zhang T, Huang W, Ni R, Lu C, Zhang X. Overexpression of SYF2 correlates with enhanced cell growth and poor prognosis in human hepatocellular carcinoma. Mol Cell Biochem 2015; 410:1-9. [PMID: 26260052 DOI: 10.1007/s11010-015-2533-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 08/06/2015] [Indexed: 01/17/2023]
Abstract
SYF2, also known as p29/NTC31/CBPIN, encodes a nuclear protein that interacts with Cyclin D-type binding-protein 1. SYF2 has been reported to be involved in pre-mRNA splicing and cell cycle regulation. In the present study, we observed that SYF2 was obviously upregulated in HCC tumor tissues and cell lines, and its level was positively correlated with the tumor grade and Ki-67 expression, as well as poor prognosis of HCC. In vitro, using serum starvation-refeeding experiment, our results suggested that SYF2 was upregulated in proliferating HCC cells, and was positive correlated with the expression of PCNA and Cyclin D1. In addition, depletion of SYF2 decreased PCNA and Cyclin D1 levels. Accordingly, interference of SYF2 resulted in cells cycle arrest at G1/S phase in Huh7 HCC cells. Furthermore, we found that SYF2 might interact with Cyclin D1 and could confer doxorubicin resistance in HCC cells. These findings revealed that SYF2 might play a regulatory role in the proliferation of HCC cells. In summary, SYF2 may be a novel prognostic marker and serve as a potential therapeutic target in HCC.
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Affiliation(s)
- Shusen Zhang
- Department of Digestion, Affiliated Hospital of Nantong University, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Weidong Shi
- Department of Oncology, The Second People's Hospital of Nantong, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Yuyan Chen
- Class 5 Grade 13, Clinical Medicine, Medical College, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Zhiwei Xu
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Jia Zhu
- Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Tingting Zhang
- Department of Digestion, Affiliated Hospital of Nantong University, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Wei Huang
- Department of Digestion, Affiliated Hospital of Nantong University, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Runzhou Ni
- Department of Digestion, Affiliated Hospital of Nantong University, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China
| | - Cuihua Lu
- Department of Digestion, Affiliated Hospital of Nantong University, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China.
| | - Xiubing Zhang
- Department of Oncology, The Second People's Hospital of Nantong, Nantong University, Nantong, 226001, Jiangsu, People's Republic of China.
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8
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Yan S, Deng Y, Qiang Y, Xi Q, Liu R, Yang S, Liu J, Tang C, Zhong J, Wang Y. SYF2 is upregulated in human epithelial ovarian cancer and promotes cell proliferation. Tumour Biol 2015; 36:4633-42. [DOI: 10.1007/s13277-015-3111-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 01/14/2015] [Indexed: 12/21/2022] Open
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9
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Involvement of p29/SYF2/fSAP29/NTC31 in the progression of NSCLC via modulating cell proliferation. Pathol Res Pract 2015; 211:36-42. [DOI: 10.1016/j.prp.2014.07.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2013] [Revised: 06/28/2014] [Accepted: 07/25/2014] [Indexed: 12/20/2022]
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10
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Zhu J, Ji L, Zhang J, Yang L, Guan C, Wang Y, Zhu J, Liang L, Ni R. Upregulation of SYF2 in esophageal squamous cell carcinoma promotes tumor cell proliferation and predicts poor prognosis. Tumour Biol 2014; 35:10275-85. [PMID: 25034528 DOI: 10.1007/s13277-014-2305-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Accepted: 07/01/2014] [Indexed: 01/14/2023] Open
Abstract
SYF2, also known as CCNDBP1-interactor or p29, is reported in pre-mRNA splicing and cell cycle progression. However, the role of SYF2 in esophageal squamous cell carcinoma (ESCC) development remains elusive. In the present study, Western blot and immunohistochemistry assays demonstrated that SYF2 was overexpressed in ESCC tumor tissues and cell lines. In addition, immunohistochemistry analysis revealed that SYF2 expression was positively correlated with tumor grade and predicted poor prognosis of ESCC. In vitro studies using serum starvation-refeeding experiment and SYF2-siRNA transfection assay demonstrated that SYF2 expression promoted proliferation of ESCC cells, while SYF2 knockdown led to decreased cell growth rate and colony formation resulted from growth arrest of cell cycle at G0/G1 phase. Furthermore, our results indicated that SYF2 can down-regulate the sensitivity of ESCC cells for cisplatin. Our findings for the first time supported that SYF2 might play an important role in the regulation of ESCC proliferation and would provide a novel therapeutic strategy against human ESCC.
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Affiliation(s)
- Junya Zhu
- Department of Gastroenterology, Affiliated Hospital of Nantong University, 19 Qixiu Road, Nantong, 226001, Jiangsu, China
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11
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Guo J, Yang L, Huang J, Liu X, Qiu X, Tao T, Liu Y, He X, Ban N, Fan S, Sun G. Knocking down the expression of SYF2 inhibits the proliferation of glioma cells. Med Oncol 2014; 31:101. [DOI: 10.1007/s12032-014-0101-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Accepted: 06/23/2014] [Indexed: 01/11/2023]
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12
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Xu W, Cao M, Zheng H, Tan X, Li L, Cui G, Xu J, Cao J, Ke K, Wu Q. Upregulation of SYF2 is associated with neuronal apoptosis caused by reactive astrogliosis to neuroinflammation. J Neurosci Res 2013; 92:318-28. [PMID: 24301298 DOI: 10.1002/jnr.23312] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 09/17/2013] [Accepted: 09/17/2013] [Indexed: 12/27/2022]
Abstract
SYF2, known as CCNDBP1-interactor or p29, is likely involved in pre-mRNA splicing and cell cycle progression. The present study was designed to elucidate dynamic changes in SYF2 expression and distribution in the cerebral cortex in a lipopolysaccharide (LPS)-induced neuroinflammation rat model. It was found that SYF2 expression was induced strongly in active astrocytes after LPS injection. In vitro studies showed that the upregulation of SYF2 might be involved in the activation of C6 cells after LPS challenge and the neuronal apoptosis after conditioned media challenge. In addition, with silencing of SYF2 in C6 and PC12 cells by siRNA, the results indicated that SYF2 was required for astrocyte activation and neuronal apoptosis induced by LPS. Our findings on the cellular signaling pathway may provide a new therapeutic strategy against neuroinflammation in the CNS.
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Affiliation(s)
- Wei Xu
- Department of Neurology, Affiliated Hospital of Nantong University, Nantong, China
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13
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Chanarat S, Sträßer K. Splicing and beyond: the many faces of the Prp19 complex. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2013; 1833:2126-34. [PMID: 23742842 DOI: 10.1016/j.bbamcr.2013.05.023] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 05/22/2013] [Accepted: 05/24/2013] [Indexed: 12/18/2022]
Abstract
The conserved Prp19 complex (Prp19C) - also known as NineTeen Complex (NTC) - functions in several processes of paramount importance for cellular homeostasis. NTC/Prp19C was discovered as a complex that functions in splicing and more specifically during the catalytic activation of the spliceosome. More recent work revealed that NTC/Prp19C plays a role in transcription elongation in Saccharomyces cerevisiae and in genome maintenance in higher eukaryotes. In addition, mouse PRP19 might ubiquity late proteins targeted for degradation and guide them to the proteasome. Furthermore, NTC/Prp19C has been implicated in lipid droplet biogenesis. In the future, the molecular function of NTC/Prp19C in all of these processes needs to be refined or elucidated. Most of NTC/Prp19C's functions have been shown in only one or few organisms. However, since this complex is highly conserved it is likely that it has the same functions across all species. Moreover, one NTC/Prp19C or different subcomplexes could function in the above-mentioned processes. Intriguingly, NTC/Prp19C might link these different processes to ensure an optimal coordination of cellular processes. Thus, many important questions about the functions of this interesting complex remain to be investigated. In this review we discuss the different functions of NTC/Prp19C focusing on the novel and emerging ones as well as open questions.
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Affiliation(s)
- Sittinan Chanarat
- Department of Molecular Cell Biology, Max Planck Institute of Biochemistry, Martinsried, Germany
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14
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Chen CH, Chu PC, Lee L, Lien HW, Lin TL, Fan CC, Chi P, Huang CJ, Chang MS. Disruption of murine mp29/Syf2/Ntc31 gene results in embryonic lethality with aberrant checkpoint response. PLoS One 2012; 7:e33538. [PMID: 22448250 PMCID: PMC3308990 DOI: 10.1371/journal.pone.0033538] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Accepted: 02/10/2012] [Indexed: 11/19/2022] Open
Abstract
Human p29 is a putative component of spliceosomes, but its role in pre-mRNA is elusive. By siRNA knockdown and stable overexpression, we demonstrated that human p29 is involved in DNA damage response and Fanconi anemia pathway in cultured cells. In this study, we generated p29 knockout mice (mp29(GT/GT)) using the mp29 gene trap embryonic stem cells to study the role of mp29 in DNA damage response in vivo. Interruption of mp29 at both alleles resulted in embryonic lethality. Embryonic abnormality occurred as early as E6.5 in mp29(GT/GT) mice accompanied with decreased mRNA levels of α-tubulin and Chk1. The reduction of α-tubulin and Chk1 mRNAs is likely due to an impaired post-transcriptional event. An aberrant G2/M checkpoint was found in mp29 gene trap embryos when exposed to aphidicolin and UV light. This embryonic lethality was rescued by crossing with mp29 transgenic mice. Additionally, the knockdown of zfp29 in zebrafish resulted in embryonic death at 72 hours of development postfertilization (hpf). A lower level of acetylated α-tubulin was also observed in zfp29 morphants. Together, these results illustrate an indispensable role of mp29 in DNA checkpoint response during embryonic development.
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Affiliation(s)
- Chia-Hsin Chen
- Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Po-Chen Chu
- Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Liekyeow Lee
- Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Huang-Wei Lien
- Institute of Fisheries Science, College of Life Science, National Taiwan University, Taipei, Taiwan
| | - Tse-Ling Lin
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Chi-Chen Fan
- Department of Physiology, Mackay Memorial Hospital, Taipei, Taiwan
| | - Peter Chi
- Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei, Taiwan
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Chang-Jen Huang
- Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei, Taiwan
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Mau-Sun Chang
- Institute of Biochemical Sciences, College of Life Science, National Taiwan University, Taipei, Taiwan
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
- * E-mail:
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15
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Soares DG, Battistella A, Rocca CJ, Matuo R, Henriques JAP, Larsen AK, Escargueil AE. Ataxia telangiectasia mutated- and Rad3-related kinase drives both the early and the late DNA-damage response to the monofunctional antitumour alkylator S23906. Biochem J 2011; 437:63-73. [PMID: 21470188 DOI: 10.1042/bj20101770] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Numerous anticancer agents and environmental mutagens target DNA. Although all such compounds interfere with the progression of the replication fork and inhibit DNA synthesis, there are marked differences in the DNA-damage response pathways they trigger, and the relative impact of the proximal or the distal signal transducers on cell survival is mainly lesion-specific. Accordingly, checkpoint kinase inhibitors in current clinical development show synergistic activity with some DNA-targeting agents, but not with others. In the present study, we characterize the DNA-damage response to the antitumour acronycine derivative S23906, which forms monofunctional adducts with guanine residues in the minor groove of DNA. S23906 exposure is accompanied by specific recruitment of RPA (replication protein A) at replication sites and rapid Chk1 activation. In contrast, neither MRN (Mre11-Rad50-Nbs1) nor ATM (ataxia-telangiectasia mutated), contributes to the initial response to S23906. Interestingly, genetic attenuation of ATR (ATM- and Ras3-related) activity inhibits not only the early phosphorylation of histone H2AX and Chk1, but also interferes with the late phosphorylation of Chk2. Moreover, loss of ATR function or pharmacological inhibition of the checkpoint kinases by AZD7762 is accompanied by abrogation of the S-phase arrest and increased sensitivity towards S23906. These findings identify ATR as a central co-ordinator of the DNA-damage response to S23906, and provide a mechanistic rationale for combinations of S23906 and similar agents with checkpoint abrogators.
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Affiliation(s)
- Daniele G Soares
- Laboratory of Cancer Biology and Therapeutics, Centre de Recherche Saint-Antoine, Paris 75571, France
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16
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Lin YH, Chou CK, Hung YC, Yu IS, Pan HA, Lin SW, Kuo PL. SEPT12 deficiency causes sperm nucleus damage and developmental arrest of preimplantation embryos. Fertil Steril 2011; 95:363-5. [PMID: 20801438 DOI: 10.1016/j.fertnstert.2010.07.1064] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Revised: 07/02/2010] [Accepted: 07/12/2010] [Indexed: 10/19/2022]
Abstract
Oocytes fertilized with spermatozoa obtained from Septin 12+/- chimeric mice failed to develop beyond the morula stage after IVF and intracytoplasmic sperm injection because of significant DNA defects in the spermatozoa. Given that SEPT12 is expressed at the edge of the sperm nucleus in both humans and mice, we hypothesized the vital roles of Septin 12 in sperm head shaping, nuclear DNA condensation, and early embryonic development.
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Affiliation(s)
- Ying-Hung Lin
- Graduate Institute of Basic Medical Sciences, Department of Obstetrics and Gynecology, National Cheng Kung University, College of Medicine, Tainan, Taiwan
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