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Meng Z, Bian X, Ma L, Zhang G, Ma Q, Xu Q, Liu J, Wang R, Lun J, Lin Q, Zhao G, Jiang H, Qiu W, Fang J, Lu Z. UBC9 stabilizes PFKFB3 to promote aerobic glycolysis and proliferation of glioblastoma cells. Int J Biochem Cell Biol 2023; 165:106491. [PMID: 38149579 DOI: 10.1016/j.biocel.2023.106491] [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: 06/16/2023] [Revised: 10/25/2023] [Accepted: 10/26/2023] [Indexed: 12/28/2023]
Abstract
Cancer cells prefer to utilizing aerobic glycolysis to generate energy and anabolic metabolic intermediates for cell growth. However, whether the activities of glycolytic enzymes can be regulated by specific posttranslational modifications, such as SUMOylation, in response to oncogenic signallings, thereby promoting the Warburg effect, remain largely unclear. Here, we demonstrate that phosphofructo-2-kinase/fructose-2,6-bisphosphatase 3 (PFKFB3), a key glycolytic enzyme, interacts with SUMO-conjugating enzyme UBC9 and is SUMOylated at K302 in glioblastoma cells. Expression of UBC9, which competitively prevents the binding of ubiquitin E3 ligase APC/C to PFKFB3 and subsequent PFKFB3 polyubiquitination, increases PFKFB3 stability and expression. Importantly, EGFR activation increases the interaction between UBC9 and PFKFB3, leading to increased SUMOylation and expression of PFKFB3. This increase is blocked by inhibition of EGFR-induced AKT activation whereas expression of activate AKT by itself was sufficient to recapitulate EGF-induced effect. Knockout of PFKFB3 expression decreases EGF-enhanced lactate production and GBM cell proliferation and this decrease was fully rescued by reconstituted expression of WT PFKFB3 whereas PFKFB3 K302R mutant expression abrogates EGF- and UBC9-regulated lactate production and GBM cell proliferation. These findings reveal a previously unknown mechanism underlying the regulation of the Warburg effect through the EGFR activation-induced and UBC9-mediated SUMOylation and stabilization of PFKFB3.
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Affiliation(s)
- Zhaoyuan Meng
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, School of Basic Medicine of Qingdao University, Qingdao 266000, China
| | - Xueli Bian
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao 266000, China; School of Basic Medical Sciences, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Leina Ma
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao 266000, China
| | - Gang Zhang
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao 266000, China
| | - Qingxia Ma
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao 266000, China
| | - Qianqian Xu
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao 266000, China
| | - Juanjuan Liu
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao 266000, China
| | - Runze Wang
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao 266000, China
| | - Jie Lun
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao 266000, China
| | - Qian Lin
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao 266000, China
| | - Gaoxiang Zhao
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao 266000, China
| | - Hongfei Jiang
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao 266000, China
| | - Wensheng Qiu
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, Qingdao 266000, China
| | - Jing Fang
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, School of Basic Medicine of Qingdao University, Qingdao 266000, China.
| | - Zhimin Lu
- Zhejiang Provincial Key Laboratory of Pancreatic Disease, The First Affiliated Hospital, and Institute of Translational Medicine, Zhejiang University School of Medicine, Hangzhou 310029, China; Cancer Center, Zhejiang University, Hangzhou 310029, China.
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Long noncoding RNA AGPG regulates PFKFB3-mediated tumor glycolytic reprogramming. Nat Commun 2020; 11:1507. [PMID: 32198345 PMCID: PMC7083971 DOI: 10.1038/s41467-020-15112-3] [Citation(s) in RCA: 117] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 02/20/2020] [Indexed: 12/17/2022] Open
Abstract
Tumor cells often reprogram their metabolism for rapid proliferation. The roles of long noncoding RNAs (lncRNAs) in metabolism remodeling and the underlying mechanisms remain elusive. Through screening, we found that the lncRNA Actin Gamma 1 Pseudogene (AGPG) is required for increased glycolysis activity and cell proliferation in esophageal squamous cell carcinoma (ESCC). Mechanistically, AGPG binds to and stabilizes 6-phosphofructo-2-kinase/fructose-2,6-biphosphatase 3 (PFKFB3). By preventing APC/C-mediated ubiquitination, AGPG protects PFKFB3 from proteasomal degradation, leading to the accumulation of PFKFB3 in cancer cells, which subsequently activates glycolytic flux and promotes cell cycle progression. AGPG is also a transcriptional target of p53; loss or mutation of TP53 triggers the marked upregulation of AGPG. Notably, inhibiting AGPG dramatically impaired tumor growth in patient-derived xenograft (PDX) models. Clinically, AGPG is highly expressed in many cancers, and high AGPG expression levels are correlated with poor prognosis, suggesting that AGPG is a potential biomarker and cancer therapeutic target. PFKFB3 enhances glycolysis to promote cancer cell proliferation. Here, the authors identify a long noncoding RNA in esophageal squamous cell carcinoma, AGPG, which interacts with PFKFB3 and promotes its stability, leading to increased glycolysis and proliferation.
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Fu H, Xu J, Chen J, Li G, Zhao X, Chen P. Microarray analysis reveals Tmub1 as a cell cycle-associated protein in rat hepatocytes. Mol Med Rep 2018; 17:4337-4344. [PMID: 29344642 PMCID: PMC5802207 DOI: 10.3892/mmr.2018.8451] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2017] [Accepted: 01/11/2018] [Indexed: 12/18/2022] Open
Abstract
Transmembrane and ubiquitin-like domain containing protein 1 (Tmub1), formerly known as hepatocyte odd protein shuttling (HOPS) has been recognized as a ubiquitously expressed shuttling protein that moves between the nucleus and cytoplasm in hepatocytes. Tmub1 is involved in liver regeneration and functions as a bridging protein in tumor cell proliferation. To investigate the transcriptional profile and potential biological processes affected by Tmub1 expression in normal rat hepatocytes, microarray and bioinformatics experiments were used to identify 127 mRNAs differentially expressed between Tmub1-overexpression, Tmub1-knockdown and normal BRL-3A cells (fold-change ≥2.5). The expression levels of 17 key node genes associated with the cell cycle were confirmed by reverse transcription-quantitative polymerase chain reaction analysis. Flow cytometry, 5-Ethynyl-20-deoxyuridine, Cell Counting Kit-8 and western blotting experiments revealed the effects on the cell cycle and the inhibition of proliferation in BRL-3A cells overexpressing Tmub1. Further co-immunoprecipitation assays demonstrated that Tmub1 interacts with cyclin A2 during the cell cycle and that the overexpression of Tmub1 may postpone cyclin A2 and cyclin B1 degradation in the M phase. The results of the present study indicated that Tmub1 functions as a cell proliferation inhibitor and cell cycle-associated protein.
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Affiliation(s)
- Hangwei Fu
- Department of Hepatobiliary Surgery, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing 400042, P.R. China
| | - Jianhua Xu
- Department of Hepatobiliary Surgery, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing 400042, P.R. China
| | - Jian Chen
- Department of Hepatobiliary Surgery, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing 400042, P.R. China
| | - Guangyao Li
- Department of Hepatobiliary Surgery, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing 400042, P.R. China
| | - Xiaobiao Zhao
- Department of Hepatobiliary Surgery, 187 Military Hospital, Haikou, Hainan 571159, P.R. China
| | - Ping Chen
- Department of Hepatobiliary Surgery, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing 400042, P.R. China
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New Functions of APC/C Ubiquitin Ligase in the Nervous System and Its Role in Alzheimer's Disease. Int J Mol Sci 2017; 18:ijms18051057. [PMID: 28505105 PMCID: PMC5454969 DOI: 10.3390/ijms18051057] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 05/05/2017] [Accepted: 05/09/2017] [Indexed: 12/16/2022] Open
Abstract
The E3 ubiquitin ligase Anaphase Promoting Complex/Cyclosome (APC/C) regulates important processes in cells, such as the cell cycle, by targeting a set of substrates for degradation. In the last decade, APC/C has been related to several major functions in the nervous system, including axon guidance, synaptic plasticity, neurogenesis, and neuronal survival. Interestingly, some of the identified APC/C substrates have been related to neurodegenerative diseases. There is an accumulation of some degradation targets of APC/C in Alzheimer’s disease (AD) brains, which suggests a dysregulation of the protein complex in the disorder. Moreover, recently evidence has been provided for an inactivation of APC/C in AD. It has been shown that oligomers of the AD-related peptide, Aβ, induce degradation of the APC/C activator subunit cdh1, in vitro in neurons in culture and in vivo in the mouse hippocampus. Furthermore, in the AD mouse model APP/PS1, lower cdh1 levels were observed in pyramidal neurons in CA1 when compared to age-matched wildtype mice. In this review, we provide a complete list of APC/C substrates that are involved in the nervous system and we discuss their functions. We also summarize recent studies that show neurobiological effects in cdh1 knockout mouse models. Finally, we discuss the role of APC/C in the pathophysiology of AD.
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