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Wu T, Liao L, Wu T, Chen S, Yi Q, Xu M. IGF2BP2 promotes glycolysis and hepatocellular carcinoma stemness by stabilizing CDC45 mRNA via m6A modification. Cell Cycle 2023; 22:2245-2263. [PMID: 37985379 PMCID: PMC10730143 DOI: 10.1080/15384101.2023.2283328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 10/09/2023] [Indexed: 11/22/2023] Open
Abstract
A growing number of studies have shown the prognostic importance of Cell division cycle protein 45 (CDC45) in hepatocellular carcinoma (HCC). This study aims to investigate the biological function and mechanism of CDC45 in HCC. The differential expression and prognostic significance of CDC45 in HCC and normal tissues were analyzed by bioinformatics. CDC45 was knocked down and the biological effects of CDC45 in HCC in vitro and in vivo were measured. Subsequently, using RNA m6A colorimetry and Methylated RNA Immunoprecipitation (MeRIP), the levels of m6A modification of total RNA and CDC45 were evaluated in cells. RIP was applied to establish that CDC45 and insulin-like growth factor 2 mRNA-binding protein 2 (IGF2BP2) interact. A test using actinomycin D was performed to gauge the stability of the CDC45 mRNA. Furthermore, the regulatory role of IGF2BP2 on CDC45 expression in HCC progression was explored by overexpressing IGF2BP2. High expression of CDC45 was correlated with poor prognosis in HCC patients. Knocking down CDC45 inhibited HCC cell proliferation, migration, invasion, EMT, stemness, and glycolysis, and promoted apoptosis, which was verified through in vitro experiments. Additionally, IGF2BP2 was highly expressed in HCC cells, and it was found to interact with CDC45. Knocking down IGF2BP2 resulted in reduced stability of CDC45 mRNA. Moreover, overexpression of IGF2BP2 promoted HCC cell proliferation, migration, invasion, EMT, stemness, and glycolysis, while inhibiting apoptosis, which was reversed by knocking down CDC45. In general, IGF2BP2 promoted HCC glycolysis and stemness by stabilizing CDC45 mRNA via m6A modification. [Figure: see text].
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Affiliation(s)
- Tao Wu
- Department of Hepatobiliary Surgery, Yueyang Central Hospital, Yueyang, China
- Department of Urology Surgery, Yueyang Central Hospital, Yueyang, China
| | - Li Liao
- Department of Hepatobiliary Surgery, Yueyang Central Hospital, Yueyang, China
| | - Tao Wu
- Department of Urology Surgery, Yueyang Central Hospital, Yueyang, China
| | - Shuai Chen
- Department of Urology Surgery, Yueyang Central Hospital, Yueyang, China
| | - Qilin Yi
- Department of Hepatobiliary Surgery, Yueyang Central Hospital, Yueyang, China
| | - Min Xu
- Department of Hepatobiliary Surgery, Yueyang Central Hospital, Yueyang, China
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Wang W, Yan T, Guo X, Cai H, Liang C, Huang L, Wang Y, Ma P, Qi S. KAP1 phosphorylation promotes the survival of neural stem cells after ischemia/reperfusion by maintaining the stability of PCNA. Stem Cell Res Ther 2022; 13:290. [PMID: 35799276 PMCID: PMC9264526 DOI: 10.1186/s13287-022-02962-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 04/17/2022] [Indexed: 11/28/2022] Open
Abstract
Aims To explore the function of phosphorylation of KAP1 (p-KAP1) at the serine-824 site (S824) in the proliferation and apoptosis of endogenous neural stem cells (NSCs) after cerebral ischemic/reperfusion (I/R). Methods The apoptosis and proliferation of C17.2 cells transfected with the p-KAP1-expression plasmids and the expression of proliferation cell nuclear antigen (PCNA) and p-KAP1 were detected by immunofluorescence and Western blotting after the Oxygen Glucose deprivation/reperfusion model (OGD/R). The interaction of p-KAP1 and CUL4A with PCNA was analyzed by immunoprecipitation. In the rats MCAO model, we performed the adeno-associated virus (AAV) 2/9 gene delivery of p-KAP1 mutants to verify the proliferation of endogenous NSCs and the colocalization of PCNA and CUL4A by immunofluorescence. Results The level of p-KAP1 was significantly down-regulated in the stroke model in vivo and in vitro. Simulated p-KAP1(S824) significantly increased the proliferation of C17.2 cells and the expression of PCNA after OGD/R. Simulated p-KAP1(S824) enhanced the binding of p-KAP1 and PCNA and decreased the interaction between PCNA and CUL4A in C17.2 cells subjected to OGD/R. The AAV2/9-mediated p-KAP1(S824) increased endogenous NSCs proliferation, PCNA expression, p-KAP1 binding to PCNA, and improved neurological function in the rat MCAO model. Conclusions Our findings confirmed that simulated p-KAP1(S824) improved the survival and proliferation of endogenous NSCs. The underlying mechanism is that highly expressed p-KAP1(S824) promotes binding to PCNA, and inhibits the binding of CUL4A to PCNA. This reduced CUL4A-mediated ubiquitination degradation to increase the stability of PCNA and promote the survival and proliferation of NSCs. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-02962-5.
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Affiliation(s)
- Wan Wang
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China.,Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, China
| | - Tianqing Yan
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China
| | - Xinjian Guo
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China
| | - Heng Cai
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China
| | - Chang Liang
- School of Basic Medical Science, Xuzhou Medical University, Xuzhou, 221004, China
| | - Linyan Huang
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China
| | - Yanling Wang
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China
| | - Ping Ma
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China. .,Department of Laboratory Medicine, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, China.
| | - Suhua Qi
- School of Medical Technology, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou Medical University, Xuzhou, 221004, China. .,Pharmacology College, Xuzhou Medical University, Xuzhou, 221004, China.
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Fu Y, Lv Z, Kong D, Fan Y, Dong B. High abundance of CDC45 inhibits cell proliferation through elevation of HSPA6. Cell Prolif 2022; 55:e13257. [PMID: 35642733 PMCID: PMC9251052 DOI: 10.1111/cpr.13257] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 04/15/2022] [Accepted: 04/25/2022] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVES CDC45 is the core component of CMG (CDC45-MCMs-GINS) complex that plays important role in the initial step of DNA replication in eukaryotic cells. The expression level of cdc45 is under the critical control for the accurate cell cycle progression. Loss-of-function of cdc45 has been demonstrated to inhibit cell proliferation and leads to cell death due to the inhibition of DNA replication and G1-phase arrest. An increasing of CDC45 inhibits cell proliferation as well. Nevertheless, a systematic analysis of the effect of high dose of CDC45 on cell physiology and behaviors is unclear. In the present study, we aimed to investigate the effects and mechanisms of high dose of CDC45 on cell behaviors. MATERIALS AND METHODS We overexpressed cdc45 in cultured cell lines, Ciona and Drosophila embryos, respectively. The cell cycle progression was examined by the BrdU incorporation experiment, flow cytometry and PH3 (phospho-Histone 3) staining. RNA-sequencing analysis and qRT-PCR were carried out to screen the affected genes in HeLa cells overexpressing cdc45. siRNA-mediated knockdown was performed to investigate gene functions in HeLa cells overexpressing cdc45. RESULTS We found that high level of cdc45 from different species (human, mammal, ascidian, and Drosophila) inhibited cell cycle in vitro and in vivo. High dose of CDC45 blocks cells entering into S phase. However, we failed to detect DNA damage and cell apoptosis. We identified hspa6 was the most upregulated gene in HeLa cells overexpressing cdc45 via RNA-seq analysis and qRT-PCR validation. Overexpression of Hs-hspa6 inhibited proliferation rate and DNA replication in HeLa cells, mimicking the phenotype of cdc45 overexpression. RNAi against hspa6 partially rescued the cell proliferation defect caused by high dose of CDC45. CONCLUSIONS Our study suggests that high abundance of CDC45 stops cell cycle. Instead of inducing apoptosis, excessive CDC45 prevents cell entering S phase probably due to promoting hspa6 expression.
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Affiliation(s)
- Yuanyuan Fu
- Sars‐Fang Centre, MoE Key Laboratory of Marine Genetics and BreedingCollege of Marine Life Sciences, Ocean University of ChinaQingdaoChina
| | - Zhiyi Lv
- Sars‐Fang Centre, MoE Key Laboratory of Marine Genetics and BreedingCollege of Marine Life Sciences, Ocean University of ChinaQingdaoChina
- Institute of Evolution & Marine BiodiversityOcean University of ChinaQingdaoChina
| | - Deqing Kong
- Department of BiologyPhilipps UniversityMarburgGermany
| | - Yuping Fan
- Sars‐Fang Centre, MoE Key Laboratory of Marine Genetics and BreedingCollege of Marine Life Sciences, Ocean University of ChinaQingdaoChina
| | - Bo Dong
- Sars‐Fang Centre, MoE Key Laboratory of Marine Genetics and BreedingCollege of Marine Life Sciences, Ocean University of ChinaQingdaoChina
- Institute of Evolution & Marine BiodiversityOcean University of ChinaQingdaoChina
- Laboratory for Marine Biology and BiotechnologyQingdao National Laboratory for Marine Science and TechnologyQingdaoChina
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Gao X, Cai T, Lin Y, Zhu R, Hao W, Guo S, Hu G. The function of glucose metabolism in embryonic diapause of annual killifish. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY. PART D, GENOMICS & PROTEOMICS 2022; 42:100965. [PMID: 35149343 DOI: 10.1016/j.cbd.2022.100965] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 01/18/2022] [Accepted: 01/25/2022] [Indexed: 06/14/2023]
Abstract
Annual killifish could survive as diapaused embryos buried in soil during dry seasons. When the embryos in diapause III were incubated in water, the larvae could be hatched quickly. However, the mechanism of diapause and hatching of annual killifish was ambiguous. In the present study, Nothobranchius guentheri were used as the model to clarify the physiological mechanism of diapause and hatching of annual killifish. The results indicated that incubation with water could significantly enhance the heart rate and blood circulation of embryos. To clarify the molecular mechanism, the transcriptomic analysis was used to compare the embryos in diapause I, diapause III, and hatching period. The results showed that DNA replication-related genes, cell division cycle 45 and proliferating cell nuclear antigen were more highly expressed in diapause I compared to diapause III. In addition, the transcript levels of glucagon, glucokinase and phosphofructokinase were more abundantly detected in hatching period compared to diapause III, but insulin receptor and insulin-like growth factor-binding protein were lower. These results indicated glucose metabolism might play an important role in diapause and hatching of killifish. To further confirm this result, several reagents involved in glucose metabolism were used to incubate embryos in diapause III. The results displayed that glucose and glucagon could both shorten the hatching time of embryos. In contrast, 2-deoxy-d-glucose, metformin, and insulin could prolong the hatching time and reduce the hatching rate. The results further confirmed that glucose metabolism played an important role in the diapause and hatching of annual killifish.
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Affiliation(s)
- Xiaowen Gao
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Tianyi Cai
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Yongtong Lin
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Rui Zhu
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Wenxin Hao
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Shuming Guo
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China
| | - Guangfu Hu
- College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China.
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He Y, Yin X, Dong J, Yang Q, Wu Y, Gong Z. Transcriptome Analysis of Caco-2 Cells upon the Exposure of Mycotoxin Deoxynivalenol and Its Acetylated Derivatives. Toxins (Basel) 2021; 13:167. [PMID: 33671637 PMCID: PMC7927021 DOI: 10.3390/toxins13020167] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 02/16/2021] [Accepted: 02/19/2021] [Indexed: 11/17/2022] Open
Abstract
Deoxynivalenol (DON), 3-acetyldeoxynivalenol (3-ADON) and 15-acetyldeoxynivalenol (15-ADON) are type B trichothecenes; one of the major pollutants in food and feed products. Although the toxicity of DON has been well documented, information on the toxicity of its acetylated derivative remains incomplete. To acquire more detailed insight into 3-ADON and 15-ADON, Caco-2 cells under 0.5 µM DON, 3-ADON and 15-ADON treatment for 24 h were subjected to RNA-seq analysis. In the present study, 2656, 3132 and 2425 differentially expressed genes (DEGs) were selected, respectively, and were enriched utilizing the Kyoto Encyclopedia of Genes and Genomes (KEGG) and the Gene Ontology (GO) database. The upregulation of ataxia-telangiectasia mutated kinase (ATM), WEE1 homolog 2 (WEE2) and downregulation of proliferating cell nuclear antigen (PCNA), minichromosome maintenance (MCMs), cyclin dependent kinase (CDKs), and E2Fs indicate that the three toxins induced DNA damage, inhibition of DNA replication and cell cycle arrest in Caco-2 cells. Additionally, the upregulation of sestrin (SENEs) and NEIL1 implied that the reason for DNA damage may be attributable to oxidative stress. Our study provides insight into the toxic mechanism of 3-ADON and 15-ADON.
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Affiliation(s)
- Yuyun He
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, China; (Y.H.); (X.Y.); (J.D.); (Q.Y.)
| | - Xiaoyao Yin
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, China; (Y.H.); (X.Y.); (J.D.); (Q.Y.)
| | - Jingjing Dong
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, China; (Y.H.); (X.Y.); (J.D.); (Q.Y.)
| | - Qing Yang
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, China; (Y.H.); (X.Y.); (J.D.); (Q.Y.)
| | - Yongning Wu
- China National Center for Food Safety Risk Assessment, NHC Key Laboratory of Food Safety Risk Assessment, Food Safety Research Unit (2019RU014) of Chinese Academy of Medical Science, Beijing 100000, China;
| | - Zhiyong Gong
- Key Laboratory for Deep Processing of Major Grain and Oil of Ministry of Education, Wuhan Polytechnic University, Wuhan 430023, China; (Y.H.); (X.Y.); (J.D.); (Q.Y.)
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