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Guo C, Guo Y, Liu J, Gao Y, Wei M, Zhao R, Chen M, Zhang G. The G1 phase optical reporter serves as a sensor of CDK4/6 inhibition in vivo. Int J Biol Sci 2021; 17:728-741. [PMID: 33767584 PMCID: PMC7975702 DOI: 10.7150/ijbs.52101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 01/10/2021] [Indexed: 02/05/2023] Open
Abstract
Visualization of cell-cycle G1 phase for monitoring the early response of cell cycle specific drug remains challenging. In this study, we developed genetically engineered bioluminescent reporters by fusing full-length cyclin E to the C-terminal luciferase (named as CycE-Luc and CycE-Luc2). Next, HeLa cell line or an ER-positive breast cancer cell line MCF-7 was transfected with these reporters. In cellular assays, the bioluminescent signal of CycE-Luc and CycE-Luc2 was accumulated in the G1 phase and decreased after exiting from the G1 phase. The expression of CycE-Luc and CycE-Luc2 fusion protein was regulated in a cell cycle-dependent manner, which was mediated by proteasome ubiquitination and degradation. Next, our in vitro and in vivo experiment confirmed that the cell cycle arrested by anti-cancer agents (palbociclib or 5-FU) was monitored quantitatively and dynamically by bioluminescent imaging of these reporters in a real-time and non-invasive manner. Thus, these optical reporters could reflect the G1 phase alternation of cell cycle, and might become a future clinically translatable approach for predicting and monitoring response to palbociclib in patients with ER-positive breast cancer.
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Affiliation(s)
- Cuiping Guo
- The Breast Center, Cancer Hospital of Shantou University Medical College, Shantou, Guangdong, China
- Guangdong Provincial Key Laboratory for Breast Cancer Diagnosis and Treatment, Cancer Hospital of Shantou University Medical College, Shantou 515041, China
| | - Yuxian Guo
- The Breast Center, Cancer Hospital of Shantou University Medical College, Shantou, Guangdong, China
- Present address: Department of Thyroid and Breast Surgery, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen, Guangdong, China
| | - Jingjing Liu
- Cancer Center & Department of Breast and Thyroid Surgery, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China
- Cancer Research Center, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Yiyang Gao
- Cancer Center & Department of Breast and Thyroid Surgery, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China
- Cancer Research Center, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Min Wei
- Cancer Center & Department of Breast and Thyroid Surgery, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China
- Cancer Research Center, School of Medicine, Xiamen University, Xiamen, Fujian, China
| | - Ruijun Zhao
- The Breast Center, Cancer Hospital of Shantou University Medical College, Shantou, Guangdong, China
| | - Min Chen
- Cancer Research Center, School of Medicine, Xiamen University, Xiamen, Fujian, China
- Clinical Central Research Core and Key Laboratory for Endocrine-Related Cancer Precision Medicine of Xiamen, Xiang'an Hospital of Xiamen University, Xiamen, Fujian, China
- ✉ Corresponding authors: Prof. Guo-Jun Zhang, Cancer Center & Department of Breast and Thyroid Surgery, Xiang'an Hospital, Xiamen University, School of Medicine, Xiamen University, No. 2000, Xiang'an Road East, Xiang'an District, Xiamen, 361101, Fujian, China. Phone: +86-592-2889988, E-mail: or Min Chen, Phone: +86-592-2889270, E-mail:
| | - Guojun Zhang
- Cancer Center & Department of Breast and Thyroid Surgery, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, China
- Cancer Research Center, School of Medicine, Xiamen University, Xiamen, Fujian, China
- Clinical Central Research Core and Key Laboratory for Endocrine-Related Cancer Precision Medicine of Xiamen, Xiang'an Hospital of Xiamen University, Xiamen, Fujian, China
- ✉ Corresponding authors: Prof. Guo-Jun Zhang, Cancer Center & Department of Breast and Thyroid Surgery, Xiang'an Hospital, Xiamen University, School of Medicine, Xiamen University, No. 2000, Xiang'an Road East, Xiang'an District, Xiamen, 361101, Fujian, China. Phone: +86-592-2889988, E-mail: or Min Chen, Phone: +86-592-2889270, E-mail:
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Chen ZH, Jing YJ, Yu JB, Jin ZS, Li Z, He TT, Su XZ. ESRP1 Induces Cervical Cancer Cell G1-Phase Arrest Via Regulating Cyclin A2 mRNA Stability. Int J Mol Sci 2019; 20:ijms20153705. [PMID: 31362365 PMCID: PMC6695732 DOI: 10.3390/ijms20153705] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 07/18/2019] [Accepted: 07/26/2019] [Indexed: 12/18/2022] Open
Abstract
Accumulating evidence indicates that epithelial splicing regulatory protein 1 (ESRP1) can inhibit the epithelial-to-mesenchymal transition (EMT), thus playing a central role in regulating the metastatic progression of tumors. However, it is still not clear whether ESRP1 directly influences the cell cycle, or what the possible underlying molecular mechanisms are. In this study, we showed that ESRP1 protein levels were significantly correlated with the Ki-67 proliferative index (r = −0.521; p < 0.01), and that ESRP1 overexpression can significantly inhibit cervical carcinoma cell proliferation and induced G1-phase arrest by downregulating cyclin A2 expression. Importantly, ESRP1 can bind to GGUGGU sequence in the 3′UTR of the cyclin A2 mRNA, and ESRP1 overexpression significantly decreases the stability of the cyclin A2 mRNA. In addition, our experimental results confirm that ESRP1 overexpression results in enhanced CDC20 expression, which is known to be responsible for cyclin A2 degradation. This study provides the first evidence that ESRP1 overexpression induces G1-phase cell cycle arrest via reducing the stability of the cyclin A2 mRNA, and inhibits cervical carcinoma cell proliferation. The findings suggest that the ESRP1/cyclin A2 regulatory axis may be essential as a regulator of cell proliferation, and may thus represent an attractive target for cervical cancer prevention and treatment.
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Affiliation(s)
- Zhi-Hong Chen
- School of Basic Medicine, Youjiang Medical University for Nationalities, No. 98 Chengxiang Road, Baise 533000, China.
- Heilongjiang Province Key Laboratory of Cancer Prevention and Treatment, Mudanjiang Medical University, No. 3, Tongxiang Street, Mudanjiang 157011, China.
| | - Ya-Jie Jing
- Sciences Research Center, Youjiang Medical University for Nationalities, No. 98 Chengxiang Road, Baise 533000, China
| | - Jian-Bo Yu
- Heilongjiang Province Key Laboratory of Cancer Prevention and Treatment, Mudanjiang Medical University, No. 3, Tongxiang Street, Mudanjiang 157011, China
| | - Zai-Shu Jin
- Heilongjiang Province Key Laboratory of Cancer Prevention and Treatment, Mudanjiang Medical University, No. 3, Tongxiang Street, Mudanjiang 157011, China
| | - Zhu Li
- Heilongjiang Province Key Laboratory of Cancer Prevention and Treatment, Mudanjiang Medical University, No. 3, Tongxiang Street, Mudanjiang 157011, China
| | - Ting-Ting He
- Sciences Research Center, Youjiang Medical University for Nationalities, No. 98 Chengxiang Road, Baise 533000, China
| | - Xiu-Zhen Su
- Sciences Research Center, Youjiang Medical University for Nationalities, No. 98 Chengxiang Road, Baise 533000, China
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Liu J, Shen JX, He D, Zhang GJ. Bioluminescence Imaging for Monitoring miR-200c Expression in Breast Cancer Cells and its Effects on Epithelial-Mesenchymal Transition Progress in Living Animals. Mol Imaging Biol 2018; 20:761-770. [PMID: 29532351 DOI: 10.1007/s11307-018-1180-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
PURPOSE Dysregulation of microRNAs (miRNAs) are not only involved in the formation of malignant tumors but also in the processes of differentiation and aggressiveness. However, current methods for detecting miRNA expression have major disadvantages, such as being invasive and non-reproducible. The epithelial-mesenchymal transition (EMT) has been implicated as a pivotal event in the metastasis, stemness, and chemoresistance of malignant tumors. PROCEDURES In our study, we constructed a new reporter gene, Luc2/tdT_miR200c_3TS, to examine the in vitro and in vivo expression of miR-200c, an EMT-associated miRNA. Quantitative real-time PCR was used to measure the expression levels of miR-200c and EMT-related mRNA, and luciferase assay and bioluminescence imaging were used to measure the luciferase activities in vitro and in vivo, respectively. RESULTS We found that the expression level of miR-200c was negatively associated with cell migration and invasion. Luciferase activities were regulated by the differential expression levels of miR-200c and EMT process. CONCLUSIONS Our results demonstrate that Luc2/tdT_miR200c_3TS may be a useful tool for monitoring the expression level of miR-200c at both the cellular level and in living animals, thereby providing a potential high-throughput approach for anticancer drug screening.
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Affiliation(s)
- Jing Liu
- Chang Jiang Scholar's Laboratory/Guangdong Provincial Key Laboratory for Diagnosis and Treatment of Breast Cancer, Shantou University Medical College, Shantou, Guangdong Province, People's Republic of China
| | - Jia-Xin Shen
- Chang Jiang Scholar's Laboratory/Guangdong Provincial Key Laboratory for Diagnosis and Treatment of Breast Cancer, Shantou University Medical College, Shantou, Guangdong Province, People's Republic of China
- The Breast Center, Cancer Hospital of Shantou University Medical College, 7 Raoping Road, Shantou, Guangdong Province, 515031, People's Republic of China
| | - De He
- Chang Jiang Scholar's Laboratory/Guangdong Provincial Key Laboratory for Diagnosis and Treatment of Breast Cancer, Shantou University Medical College, Shantou, Guangdong Province, People's Republic of China
- The Breast Center, Cancer Hospital of Shantou University Medical College, 7 Raoping Road, Shantou, Guangdong Province, 515031, People's Republic of China
| | - Guo-Jun Zhang
- Chang Jiang Scholar's Laboratory/Guangdong Provincial Key Laboratory for Diagnosis and Treatment of Breast Cancer, Shantou University Medical College, Shantou, Guangdong Province, People's Republic of China.
- The Breast Center, Cancer Hospital of Shantou University Medical College, 7 Raoping Road, Shantou, Guangdong Province, 515031, People's Republic of China.
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You H, Fu S, Qin X, Yu Y, Yang B, Zhang G, Sun X, Feng Y, Chen Y, Wu J. A study of the synergistic effect of folate-decorated polymeric micelles incorporating Hydroxycamptothecin with radiotherapy on xenografted human cervical carcinoma. Colloids Surf B Biointerfaces 2015; 140:150-160. [PMID: 26752212 DOI: 10.1016/j.colsurfb.2015.12.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 11/23/2015] [Accepted: 12/18/2015] [Indexed: 12/09/2022]
Abstract
In this study, Hydroxycamptothecin (HCPT)-loaded micelles were formed in water by the self-assembly of folate (FA)-decorated amphiphilic block copolymer, methoxy poly(ethylene glycol)-poly(ε-caprolactone) (MPEG-PCL), and achieved a hydrodynamic diameter about of 132 nm. HCPT release from the micelles exhibited no initial burst but showed a sustained release profile. The cytotoxicity and targeting ability of FA conjugated polymeric micelles was investigated by using methylthiazoletetrazolium (MTT) and fluorescence microscopy. We found that FA-conjugated micelles had superior cytotoxicity against HeLa cells compared to non-conjugated micelles, and that they exerted this effect by folate receptor (FR)-mediated endocytosis. In addition, HeLa cells were xenografted into nude mice and subjected to radiotherapy (RT) and/or HCPT-loaded micelle treatment. The antitumor efficacy was detected by analysis of tumor growth delay (TGD) and median survival time. Micro fluorine-18-deoxyglucose PET/computed tomography ((18)F-FDG PET/CT) was performed to assess early tumor response to HCPT-loaded micelles in combination with RT. Analysis of cell cycle redistribution, apoptosis and expression of histone H2AX phosphorylation (λ-H2AX) was used to evaluate the mechanism by which HCPT loaded micelles led to radiosensitization. Taken together, the results showed that HCPT-loaded FA decorated micelles efficiently sensitized xenografts in mice to RT, and induced G2/M phase arrest, apoptosis and expression of λ-H2AX.
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Affiliation(s)
- Hong You
- Department of Oncology, the First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - ShaoZhi Fu
- Department of Oncology, the First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China.
| | - XingHu Qin
- Department of Neurosurgery, the First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - YanXin Yu
- Department of Oncology, the First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - Bo Yang
- Department of Oncology, the First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - GuangPeng Zhang
- Department of Oncology, the First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - XiaoYang Sun
- Department of Oncology, the First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - Yue Feng
- Department of Nuclear Medicine, the First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - Yue Chen
- Department of Nuclear Medicine, the First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China
| | - JingBo Wu
- Department of Oncology, the First Affiliated Hospital of Sichuan Medical University, Luzhou 646000, China.
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Chan CF, Lan R, Tsang MK, Zhou D, Lear S, Chan WL, Cobb SL, Wong WK, Hao J, Wong WT, Wong KL. Directional Plk1 inhibition-driven cell cycle interruption using amphiphilic thin-coated peptide-lanthanide upconversion nanomaterials as in vivo tumor suppressors. J Mater Chem B 2015; 3:2624-2634. [PMID: 32262910 DOI: 10.1039/c4tb02104e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Polo-like kinase 1 (Plk1) is a major serine/threonine protein kinase which regulates key mitotic events.
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Affiliation(s)
- Chi-Fai Chan
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- Hong Kong
| | - Rongfeng Lan
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- Hong Kong
| | - Ming-Kiu Tsang
- Department of Applied Physics
- The Hong Kong Polytechnic University
- Hong Kong
| | - Di Zhou
- School of Chemistry and Material Engineering Jiangsu
- Key Laboratory of Advanced Functional Materials
- Changshu Institute of Technology
- Changshu
- China
| | - Sam Lear
- Department of Chemistry
- Durham University
- Durham
- UK
| | - Wai-Lun Chan
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- Hong Kong
| | | | - Wai-Kwok Wong
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- Hong Kong
| | - Jianhua Hao
- Department of Applied Physics
- The Hong Kong Polytechnic University
- Hong Kong
| | - Wing-Tak Wong
- Department of Applied Biological and Chemical Technology
- The Hong Kong Polytechnic University
- Hong Kong
- State Key Laboratory for Chirosciences from The Ministry of Science and Technology of the People's Republic of China
- The Hong Kong Polytechnic University
| | - Ka-Leung Wong
- Department of Chemistry
- Hong Kong Baptist University
- Kowloon Tong
- Hong Kong
- Changshu Research Institute of Hong Kong Baptist University
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Cardiac myocyte proliferation: not as simple as counting sheep. J Mol Cell Cardiol 2014; 74:125-6. [PMID: 24839912 DOI: 10.1016/j.yjmcc.2014.05.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 05/05/2014] [Accepted: 05/09/2014] [Indexed: 11/23/2022]
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