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Gu Q, Wu J, Xu H, Cao H, Zhang J, Jing C, Wang Z, Du M, Ma R, Feng J. CLASRP oncogene as a novel target for colorectal cancer. Funct Integr Genomics 2023; 23:290. [PMID: 37658940 PMCID: PMC10474993 DOI: 10.1007/s10142-023-01208-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 08/04/2023] [Accepted: 08/11/2023] [Indexed: 09/05/2023]
Abstract
Clk4-associated serine/arginine-rich protein (CLASRP), an alternative splicing regulator, may be involved in the development and progression of cancer by regulating the activity of the CDC-like kinase (Clk) family. This study explored the biological function of CLASRP in colorectal cancer (CRC). The expression of CLASRP, which is associated with clinicopathological features, was analysed in CRC tissues and paired noncancer tissues by RT-PCR. The roles of CLASRP were investigated in CRC cells transfected with plasmids or shRNA through proliferation, migration and invasion assays in vitro and a xenograft model in vivo. Apoptosis was analysed using CLASRP-overexpressing CRC cells by western blotting. Clk inhibitors were used to perform functional research on CLASRP in CLASRP-overexpressing CRC cells. CLASRP was significantly upregulated in CRC cell lines, while high CLASRP expression was correlated with metastasis in CRC patients. Functionally, overexpression of CLASRP significantly promoted the proliferation, migration and invasion of CRC cells in vitro and tumour growth in vivo. Mechanistically, the proliferation, migration and invasion of CLASRP-overexpressing CRC cells were inhibited by Clk inhibitors, accompanied by low expression of CLASRP at the gene and protein levels. Clk inhibitors induced apoptosis of CLASRP-overexpressing CRC cells, resulting in direct blockade of cell growth. The expression levels of cleaved caspase 3 and cleaved caspase 8 were increased in CLASRP-overexpressing CRC cells treated with Clk inhibitors. CLASRP might serve as a promotional oncogene in CRC cells and be suppressed by Clk inhibitors through activation of caspase pathways.
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Affiliation(s)
- Quan Gu
- Nanjing Medical University Affiliated Cancer Hospital and Research Center for Clinical Oncology, Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, 42 BaiZiTing Road, Nanjing, Jiangsu, 210000, People's Republic of China
| | - Jianzhong Wu
- Nanjing Medical University Affiliated Cancer Hospital and Research Center for Clinical Oncology, Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, 42 BaiZiTing Road, Nanjing, Jiangsu, 210000, People's Republic of China
| | - Heng Xu
- Jiangsu Provincial Institute of Materia Medica, Nanjing Tech University, Nanjing, Jiangsu, China
| | - Haixia Cao
- Nanjing Medical University Affiliated Cancer Hospital and Research Center for Clinical Oncology, Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, 42 BaiZiTing Road, Nanjing, Jiangsu, 210000, People's Republic of China
| | - Junying Zhang
- Nanjing Medical University Affiliated Cancer Hospital and Research Center for Clinical Oncology, Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, 42 BaiZiTing Road, Nanjing, Jiangsu, 210000, People's Republic of China
| | - Changwen Jing
- Nanjing Medical University Affiliated Cancer Hospital and Research Center for Clinical Oncology, Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, 42 BaiZiTing Road, Nanjing, Jiangsu, 210000, People's Republic of China
| | - Zhuo Wang
- Nanjing Medical University Affiliated Cancer Hospital and Research Center for Clinical Oncology, Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, 42 BaiZiTing Road, Nanjing, Jiangsu, 210000, People's Republic of China
| | - Mengjie Du
- Jiangsu Provincial Institute of Materia Medica, Nanjing Tech University, Nanjing, Jiangsu, China
| | - Rong Ma
- Nanjing Medical University Affiliated Cancer Hospital and Research Center for Clinical Oncology, Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, 42 BaiZiTing Road, Nanjing, Jiangsu, 210000, People's Republic of China.
| | - Jifeng Feng
- Nanjing Medical University Affiliated Cancer Hospital and Research Center for Clinical Oncology, Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, 42 BaiZiTing Road, Nanjing, Jiangsu, 210000, People's Republic of China.
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Wang M, Zhang F, Luo Y, Shuo L, Wang MQ. DPA-Substituted Carbazole Derivative as a Fluorescent Ligand for G4 DNA. Chem Biodivers 2022; 19:e202200061. [PMID: 35762741 DOI: 10.1002/cbdv.202200061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 06/17/2022] [Indexed: 11/07/2022]
Abstract
Herein a conjugated dipicolylamine/carbazole (Car-DPA) molecule was designed and synthesized to enhance the performance for the application as a G4 fluorescent ligand. This ligand has been found to display distinct and specific fluorescence enhancements in the presence of various G4 DNA structures, but limited with ssDNA or dsDNAs. The detail binding characteristics of the ligand with c-MYC G4 DNA were investigated by fluorescence, UV/VIS absorption, CD spectroscopy, and molecular docking. The present study demonstrated that Car-DPA bound to c-MYC G4s with a two-step complex formation, in which the binding mode appeared to be end-stacking. Confocal fluorescence images indicated that ligand Car-DPA could locate in nucleus, which is quite prominent from the cellular internalization studies.
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Affiliation(s)
- Ming Wang
- College of Mechanical Engineering and Automation, Shandong Institute of Petrochemical Technology, Dongying, 257001, P. R. China
| | - Feng Zhang
- College of Mechanic and Electronic Engineering, China University of Petroleum (East China), Qingdao, 266580, P. R. China.,Shengli Oil Field Petroleum Engineering Technology Research Institute Sinopec, Dongying, 257000, P. R. China
| | - Yang Luo
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, P. R. China
| | - Li Shuo
- School of Chemical Engineering, Chongqing University of Technology, Chongqing, 400054, P. R. China
| | - Ming-Qi Wang
- School of Pharmacy, Jiangsu University, Zhenjiang, 212013, P. R. China
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Cai Y, Li B, Peng D, Wang X, Li P, Huang M, Xing H, Chen J. Crm1-Dependent Nuclear Export of Bach1 is Involved in the Protective Effect of Hyperoside on Oxidative Damage in Hepatocytes and CCl 4-induced Acute Liver Injury. J Inflamm Res 2021; 14:551-565. [PMID: 33658828 PMCID: PMC7920627 DOI: 10.2147/jir.s279249] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 12/16/2020] [Indexed: 12/12/2022] Open
Abstract
Background Nrf2-Bach1 antioxidant signaling pathway is considered as one of the most important mechanisms of cellular resistance to oxidative injury. The effect of hyperoside (Hyp) on the expression and distribution of Bach1, the relationship of Hyp's antioxidative effect and the influence of Bach1 remains unclear. Purpose The aim of this study was to investigate the role and mechanisms of Bach1 in the protective effect of Hyp on oxidative liver injury. Methods The protective effect of Hyp on oxidative stress injury was observed in vivo and in vitro. Next, the influence of Hyp on Bach1 expression and distribution, and competitive combination of Nrf2-Bach1 with ARE in H2O2-induced L02 cell was studied by Western blot, RT-PCR, immunofluorescence and CHIP assay. Finally, the expressions of Crm1, ERK and p38 and their roles on Hyp mediated nuclear export of Bach1 were investigated by Western blot. Results Hyp ameliorated the pathological damage, reduced the liver index, AST, ALT and MDA activities, and increased SOD and GSH levels in the CCl4-induced acute liver injury mouse model. Hyp attenuated H2O2-induced oxidative stress injury in L02 cells. Hyp promoted the early rapid redistribution of Bach1 from nucleus to cytoplasm. CHIP analyses demonstrated that Hyp enhanced the levels of Nrf2-ARE complex, and weakened the levels of Bach1-ARE complex within three hours. In addition, Hyp enhanced transport protein Crm1 expression and ERK1/2 activity. And LMB, a Crm1 inhibitor, attenuated the effect of Hyp on Bach1 nuclear export and anti-oxidation. U0126, an ERK1/2 inhibitor, reduced the effect of Hyp on Crm1 expression and the Bach1 redistribution. Conclusion The hepatoprotective mechanism of Hyp was related to improve Bach1 nuclear export depending on ERK1/2-Crm1 to upregulate the level of Nrf2 binding to ARE.
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Affiliation(s)
- Yongqing Cai
- Department of Pharmacy, Daping Hospital, Army Medical University, Chongqing, 400042, People's Republic of China
| | - Bin Li
- Department of Pharmacy, Daping Hospital, Army Medical University, Chongqing, 400042, People's Republic of China
| | - Dan Peng
- Department of Pharmacy, Daping Hospital, Army Medical University, Chongqing, 400042, People's Republic of China
| | - Xianfeng Wang
- Department of Pharmacy, Daping Hospital, Army Medical University, Chongqing, 400042, People's Republic of China
| | - Pan Li
- Department of Pharmacy, Fengdu Traditional Chinese Medicine Hospital, Chongqing, 408299, People's Republic of China
| | - Mingchun Huang
- Department of Pharmacy, Chongqing Traditional Chinese Medicine Hospital, Chongqing, 400021, People's Republic of China
| | - Haiyan Xing
- Department of Pharmacy, Daping Hospital, Army Medical University, Chongqing, 400042, People's Republic of China
| | - Jianhong Chen
- Department of Pharmacy, Daping Hospital, Army Medical University, Chongqing, 400042, People's Republic of China
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