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Zhang Y, Ma H, Li L, Sun C, Yu C, Wang L, Xu D, Song X, Yu R. Dual-Targeted Novel Temozolomide Nanocapsules Encapsulating siPKM2 Inhibit Aerobic Glycolysis to Sensitize Glioblastoma to Chemotherapy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2400502. [PMID: 38651254 DOI: 10.1002/adma.202400502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/07/2024] [Indexed: 04/25/2024]
Abstract
Chemotherapy of glioblastoma (GBM) has not yielded success due to inefficient blood-brain barrier (BBB) penetration and poor glioma tissue accumulation. Aerobic glycolysis, as the main mode of energy supply for GBM, safeguards the rapid growth of GBM while affecting the efficacy of radiotherapy and chemotherapy. Therefore, to effectively inhibit aerobic glycolysis, increase drug delivery efficiency and sensitivity, a novel temozolomide (TMZ) nanocapsule (ApoE-MT/siPKM2 NC) is successfully designed and prepared for the combined delivery of pyruvate kinase M2 siRNA (siPKM2) and TMZ. This drug delivery platform uses siPKM2 as the inner core and methacrylate-TMZ (MT) as the shell component to achieve inhibition of glioma energy metabolism while enhancing the killing effect of TMZ. By modifying apolipoprotein E (ApoE), dual targeting of the BBB and GBM is achieved in a "two birds with one stone" style. The glutathione (GSH) responsive crosslinker containing disulfide bonds ensures "directional blasting" cleavage of the nanocapsules to release MT and siPKM2 in the high GSH environment of glioma cells. In addition, in vivo experiments verify that ApoE-MT/siPKM2 NC has good targeting ability and prolongs the survival of tumor-bearing nude mice. In summary, this drug delivery system provides a new strategy for metabolic therapy sensitization chemotherapy.
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Affiliation(s)
- Yongkang Zhang
- Institute of Nervous System Diseases, Xuzhou Medical University, Xuzhou, 221002, China
- Department of Neurosurgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, China
| | - Hongwei Ma
- Institute of Nervous System Diseases, Xuzhou Medical University, Xuzhou, 221002, China
- Department of Neurosurgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, China
| | - Linsen Li
- Institute of Nervous System Diseases, Xuzhou Medical University, Xuzhou, 221002, China
- Department of Neurosurgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, China
| | - Chen Sun
- Department of Nephrology, Xuzhou Central Hospital, Xuzhou, 221009, China
| | - Changshui Yu
- Institute of Nervous System Diseases, Xuzhou Medical University, Xuzhou, 221002, China
- Department of Neurosurgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, China
| | - Lansheng Wang
- Institute of Nervous System Diseases, Xuzhou Medical University, Xuzhou, 221002, China
- Department of Neurosurgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, China
| | - Duo Xu
- Institute of Nervous System Diseases, Xuzhou Medical University, Xuzhou, 221002, China
- Department of Neurosurgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, China
| | - Xu Song
- Institute of Nervous System Diseases, Xuzhou Medical University, Xuzhou, 221002, China
- Department of Neurosurgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, China
| | - Rutong Yu
- Institute of Nervous System Diseases, Xuzhou Medical University, Xuzhou, 221002, China
- Department of Neurosurgery, Affiliated Hospital of Xuzhou Medical University, Xuzhou, 221002, China
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Zhao ZW, Xu YW, Zhang XT, Ma HH, Zhang JK, Wu X, Huang Y. Elevated plasma pyruvate kinase M2 concentrations are associated with the clinical severity and prognosis of coronary artery disease. Biochem Med (Zagreb) 2024; 34:010704. [PMID: 38125618 PMCID: PMC10731730 DOI: 10.11613/bm.2024.010704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 10/17/2023] [Indexed: 12/23/2023] Open
Abstract
Introduction Pyruvate kinase M2 (PKM2) was involved in the pathophysiology of atherosclerosis and coronary artery disease (CAD). We tested whether plasma PKM2 concentrations were correlated with clinical severity and major adverse cardiovascular events (MACEs) in CAD patients. Materials and methods A total of 2443 CAD patients and 238 controls were enrolled. The follow-up time was two years. Plasma PKM2 concentrations were detected by enzyme-linked immunosorbent assay (ELISA) kits (Cloud-Clone, Wuhan, China) using SpectraMax i3x Multi-Mode Microplate Reader (Molecular Devices, San Jose, USA). The predictors of acute coronary syndrome (ACS) were assessed by logistic regression analysis. The association between PKM2 concentration in different quartiles and MACEs was evaluated by Kaplan-Meier (KM) curves with log-rank test and Cox proportional hazard models. The predictive value of PKM2 and a cluster of conventional risk factors was determined by Receiver operating characteristic (ROC) curves. The net reclassification improvement (NRI) and the integrated discrimination improvement (IDI) were utilized to evaluate the enhancement in risk prediction when PKM2 was added to a predictive model containing a cluster of conventional risk factors. Results In CAD patients, PKM2 concentration was the independent predictor of ACS (P < 0.001). Kaplan-Meier cumulative survival curves and Cox proportional hazards analyses revealed that patients with a higher PKM2 concentration had higher incidence of MACEs compared to those with a lower PKM2 concentration (P < 0.001). The addition of PKM2 to a cluster of conventional risk factors significantly increased its prognostic value of MACEs. Conclusion Baseline plasma PKM2 concentrations predict the clinical severity and prognosis of CAD.
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Affiliation(s)
- Zi-wen Zhao
- Department of Cardiology, Fujian Heart Medical Center, Fujian Institute of Coronary Heart Disease, Fujian Medical University Union Hospital, Fujian Medical University, Fuzhou, China
| | - Yi-wei Xu
- Department of Cardiology, Fujian Heart Medical Center, Fujian Institute of Coronary Heart Disease, Fujian Medical University Union Hospital, Fujian Medical University, Fuzhou, China
| | - Xin-tao Zhang
- Department of Cardiology, Fujian Heart Medical Center, Fujian Institute of Coronary Heart Disease, Fujian Medical University Union Hospital, Fujian Medical University, Fuzhou, China
| | - Hang-hao Ma
- Department of Cardiology, Ningde People Hospital, Ningde, China
| | - Jing-kun Zhang
- Cardiovascular Research Institute, University of California, San Francisco, USA
| | - Xue Wu
- Institute for Global Health Sciences, University of California, San Francisco, USA
| | - Yu Huang
- Department of Cardiology, Fujian Heart Medical Center, Fujian Institute of Coronary Heart Disease, Fujian Medical University Union Hospital, Fujian Medical University, Fuzhou, China
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Wang B, Pu R. Association between glycolysis markers and prognosis of liver cancer: a systematic review and meta-analysis. World J Surg Oncol 2023; 21:390. [PMID: 38114977 PMCID: PMC10731852 DOI: 10.1186/s12957-023-03275-4] [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: 07/13/2023] [Accepted: 12/08/2023] [Indexed: 12/21/2023] Open
Abstract
BACKGROUND In recent years, the capacity of tumor cells to maintain high levels of glycolysis, even in the presence of oxygen, has emerged as one of the main metabolic traits and garnered considerable attention. The purpose of this meta-analysis is to investigate the prognostic value of glycolysis markers in liver cancer. METHODS PubMed, Embase, and Cochrane Library databases were searched for articles on glycolytic marker expression levels associated with the prognosis of liver cancer until April 2023. Stata SE14.0 was used to calculate the aggregate hazard ratios and 95% confidence intervals. RESULTS Thirty-five studies were included. The worse overall survival (OS) (P < 0.001), disease-free survival (DFS) (P = 0.001), recurrence-free survival (RFS) (P = 0.004), and time to recurrence (TTR) (P < 0.001) were significantly associated with elevated expression of glycolysis markers. Higher expression of PKM2 (P < 0.001), STMN1 (P = 0.002), MCT4 (P < 0.001), GLUT1 (P = 0.025), HK-2 (P < 0.001), and CA9 (P < 0.001) were significantly related to shorter OS. Increased levels of PKM2 (P < 0.001), CA9 (P = 0.005), and MCT4 (P < 0.001) were associated with worse DFS. Elevated PKM2 expression (P = 0.002) was also associated with poorer RFS in hepatocellular carcinoma patients. GLUT2 expression was not correlated with the prognosis of liver cancer (P = 0.134). CONCLUSIONS Elevated expression of glycolysis markers was associated with worse OS, DFS, RFS, and TTR in patients with liver cancer. Therefore, these glycolysis markers could serve as potential prognostic markers and therapeutic targets in liver cancer. TRIAL REGISTRATION PROSPERO registration: CRD42023469645.
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Affiliation(s)
- Boqin Wang
- Department of Clinical Laboratory, SSL Central Hospital of Dongguan City, Dongguan, Guangdong, China
| | - Rong Pu
- Department of Clinical Laboratory, SSL Central Hospital of Dongguan City, Dongguan, Guangdong, China.
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Qu H, Liu J, Zhang D, Xie R, Wang L, Hong J. Glycolysis in Chronic Liver Diseases: Mechanistic Insights and Therapeutic Opportunities. Cells 2023; 12:1930. [PMID: 37566009 PMCID: PMC10417805 DOI: 10.3390/cells12151930] [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: 06/01/2023] [Revised: 07/17/2023] [Accepted: 07/21/2023] [Indexed: 08/12/2023] Open
Abstract
Chronic liver diseases (CLDs) cover a spectrum of liver diseases, ranging from nonalcoholic fatty liver disease to liver cancer, representing a growing epidemic worldwide with high unmet medical needs. Glycolysis is a conservative and rigorous process that converts glucose into pyruvate and sustains cells with the energy and intermediate products required for diverse biological activities. However, abnormalities in glycolytic flux during CLD development accelerate the disease progression. Aerobic glycolysis is a hallmark of liver cancer and is responsible for a broad range of oncogenic functions including proliferation, invasion, metastasis, angiogenesis, immune escape, and drug resistance. Recently, the non-neoplastic role of aerobic glycolysis in immune activation and inflammatory disorders, especially CLD, has attracted increasing attention. Several key mediators of aerobic glycolysis, including HIF-1α and pyruvate kinase M2 (PKM2), are upregulated during steatohepatitis and liver fibrosis. The pharmacological inhibition or ablation of PKM2 effectively attenuates hepatic inflammation and CLD progression. In this review, we particularly focused on the glycolytic and non-glycolytic roles of PKM2 in the progression of CLD, highlighting the translational potential of a glycolysis-centric therapeutic approach in combating CLD.
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Affiliation(s)
| | | | | | | | | | - Jian Hong
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou 510632, China; (H.Q.)
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Xu Z, Pei C, Cheng H, Song K, Yang J, Li Y, He Y, Liang W, Liu B, Tan W, Li X, Pan X, Meng L. Comprehensive analysis of FOXM1 immune infiltrates, m6a, glycolysis and ceRNA network in human hepatocellular carcinoma. Front Immunol 2023; 14:1138524. [PMID: 37234166 PMCID: PMC10208224 DOI: 10.3389/fimmu.2023.1138524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 04/26/2023] [Indexed: 05/27/2023] Open
Abstract
Background Forkhead box M1 (FOXM1) is a member of the Forkhead box (Fox) transcription factor family. It regulates cell mitosis, cell proliferation, and genome stability. However, the relationship between the expression of FOXM1 and the levels of m6a modification, immune infiltration, glycolysis, and ketone body metabolism in HCC has yet to be fully elucidated. Methods Transcriptome and somatic mutation profiles of HCC were downloaded from the TCGA database. Somatic mutations were analyzed by maftools R package and visualized in oncoplots. GO, KEGG and GSEA function enrichment was performed on FOXM1 co-expression using R. We used Cox regression and machine learning algorithms (CIBERSORT, LASSO, random forest, and SVM-RFE) to study the prognostic value of FOXM1 and immune infiltrating characteristic immune cells in HCC. The relationship between FOXM1 and m6A modification, glycolysis, and ketone body metabolism were analyzed by RNA-seq and CHIP-seq. The competing endogenous RNA (ceRNA) network construction relies on the multiMiR R package, ENCORI, and miRNET platforms. Results FOXM1 is highly expressed in HCC and is associated with a poorer prognosis. At the same time, the expression level of FOXM1 is significantly related to the T, N, and stage. Subsequently, based on the machine learning strategies, we found that the infiltration level of T follicular helper cells (Tfh) was a risk factor affecting the prognosis of HCC patients. The high infiltration of Tfh was significantly related to the poor overall survival rate of HCC. Besides, the CHIP-seq demonstrated that FOXM1 regulates m6a modification by binding to the promoter of IGF2BP3 and affects the glycolytic process by initiating the transcription of HK2 and PKM in HCC. A ceRNA network was successfully obtained, including FOXM1 - has-miR-125-5p - DANCR/MIR4435-2HG ceRNA network related to the prognosis of HCC. Conclusion Our study implicates that the aberrant infiltration of Tfh associated with FOXM1 is a crucial prognostic factor for HCC patients. FOXM1 regulates genes related to m6a modification and glycolysis at the transcriptional level. Furthermore, the specific ceRNA network can be used as a potential therapeutic target for HCC.
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Affiliation(s)
- Ziwu Xu
- School of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
- College of Biology, Hunan University, Changsha, China
| | - Chaozhu Pei
- College of Biology, Hunan University, Changsha, China
| | - Haojie Cheng
- College of Biology, Hunan University, Changsha, China
| | - Kaixin Song
- School of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Junting Yang
- School of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Yuhang Li
- School of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Yue He
- School of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Wenxuan Liang
- School of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Biyuan Liu
- School of Medical, Hunan University of Chinese Medicine, Changsha, China
| | - Wen Tan
- Department of Pathology, Changsha Hospital of Traditional Chinese Medicine, Changsha Eighth Hospital, Changsha, China
| | - Xia Li
- Department of General Surgery, People's Hospital of Hunan Province, Changsha, China
| | - Xue Pan
- School of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
| | - Lei Meng
- School of Pharmacy, Hunan University of Chinese Medicine, Changsha, China
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Pan-Cancer Analysis of the Oncogenic and Prognostic Role of PKM2: A Potential Target for Survival and Immunotherapy. BIOMED RESEARCH INTERNATIONAL 2023; 2023:3375109. [PMID: 36865483 PMCID: PMC9974260 DOI: 10.1155/2023/3375109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 01/05/2023] [Accepted: 01/07/2023] [Indexed: 02/25/2023]
Abstract
Background No pan-cancer study has been conducted till date to explore the comprehensive oncogenic roles of pyruvate kinase M2 (PKM2). Methods TCGA, TIMER, GEPIA, UALCAN, STRING, and other databases were used to analyze the expression, prognostic roles, epigenetic variants, and possible oncogenic mechanisms of PKM2. Proteomic sequencing data and PRM were applied to validate. Results PKM2 showed higher expression in majority of cancers, the expression being significantly correlated with the clinical stage. Higher expression of PKM2 was associated with lower OS and DFS in several cancers, such as MESO and PAAD. In addition, the epigenetic variation of PKM2, including gene alteration, mutation type and sites, DNA methylation, and phosphorylation, showed diversity in different cancers. All four methods indicated that PKM2 is positively associated with the immune infiltration of tumor-associated fibroblasts, such as in THCA, GBM, and SARC. Further mechanistic exploration suggested that the ribosome pathway might play an essential role in the regulation of PKM2, and interestingly, four out of ten hub genes were found to be highly related to OS in several cancers. Finally, in thyroid cancer specimen, we validated the expression and potential mechanisms by proteomic sequencing and PRM validation. Conclusion In the majority of cancers, the higher expression of PKM2 was highly associated with poor prognosis. Further molecular mechanism exploration implied that PKM2 might serve as a potential target for cancer survival and immunotherapy by regulating the ribosome pathway.
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Fan C, Kam S, Ramadori P. Metabolism-Associated Epigenetic and Immunoepigenetic Reprogramming in Liver Cancer. Cancers (Basel) 2021; 13:cancers13205250. [PMID: 34680398 PMCID: PMC8534280 DOI: 10.3390/cancers13205250] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 10/13/2021] [Accepted: 10/16/2021] [Indexed: 12/28/2022] Open
Abstract
Metabolic reprogramming and epigenetic changes have been characterized as hallmarks of liver cancer. Independently of etiology, oncogenic pathways as well as the availability of different energetic substrates critically influence cellular metabolism, and the resulting perturbations often cause aberrant epigenetic alterations, not only in cancer cells but also in the hepatic tumor microenvironment. Metabolic intermediates serve as crucial substrates for various epigenetic modulations, from post-translational modification of histones to DNA methylation. In turn, epigenetic changes can alter the expression of metabolic genes supporting on the one hand, the increased energetic demand of cancer cells and, on the other hand, influence the activity of tumor-associated immune cell populations. In this review, we will illustrate the most recent findings about metabolic reprogramming in liver cancer. We will focus on the metabolic changes characterizing the tumor microenvironment and on how these alterations impact on epigenetic mechanisms involved in the malignant progression. Furthermore, we will report our current knowledge about the influence of cancer-specific metabolites on epigenetic reprogramming of immune cells and we will highlight how this favors a tumor-permissive immune environment. Finally, we will review the current strategies to target metabolic and epigenetic pathways and their therapeutic potential in liver cancer, alone or in combinatorial approaches.
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Li Y, Tian H, Luo H, Fu J, Jiao Y, Li Y. Prognostic Significance and Related Mechanisms of Hexokinase 1 in Ovarian Cancer. Onco Targets Ther 2020; 13:11583-11594. [PMID: 33204111 PMCID: PMC7667154 DOI: 10.2147/ott.s270688] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 10/13/2020] [Indexed: 01/10/2023] Open
Abstract
Purpose Ovarian cancer (OC) has the highest mortality among gynecological malignancies. Therefore, it is urgent to explore prognostic biomarkers to improve the survival of OC patients. One of the most prominent metabolic characteristics of cancer is effective glycolysis. Hexokinase 1 (HK1), as the first rate-limiting enzyme in glycolysis, is closely related to cancer progression. However, the role of HK1 in OC remains unclear. Materials and Methods The Cancer Genome Atlas (TCGA) database was used to detect the expression of HK1 in OC patients. The chi-squared test was performed to examine the correlations between HK1 and patients’ clinical characteristics. Survival analyses were undertaken to determine the relationship between HK1 and patient survival, while the univariate/multivariate Cox model was used to evaluate the role of HK1 in patient prognosis. Gene Set Enrichment Analysis (GSEA) was performed to ascertain the related signaling pathways of HK1. RT-qPCR was implemented to validate the mRNA expression of HK1 in OC cells. MTT was used to detect cell viability after adding 2DG and knocking down HK1 in OC cells. HK1 protein expression was examined by Western blotting. Glucose uptake, lactate production, and ATP assays were undertaken following knockdown of HK1 in OC cells. Colony formation assays were performed to determine OC cell proliferation after HK1 knockdown. Transwell and wound healing assays were carried out to detect the invasion and migration of OC cells after HK1 knockdown. Results We found that HK1 expression was increased in OC tissues and cells, and HK1 was related to the clinical characteristics of OC patients. Survival analysis revealed that OC patients in the HK1 overexpression group had poor survival. Moreover, univariant/multivariate analyses showed that HK1 may be an independent biomarker for the poor prognosis of OC patients. OC cell viability and proliferation decreased after knockdown of HK1. Consistently, glucose uptake, lactic acid production, ATP production, invasion, and migration were also decreased. Finally, GSEA enrichment analysis and Western blotting showed that HK1 was involved in MAPK/ERK signaling. Conclusion HK1 may be a biomarker for the poor prognosis of OC patients and a potential therapeutic target.
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Affiliation(s)
- Yanqing Li
- Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin 130021, People's Republic of China
| | - Huining Tian
- College of Translational Medicine, The First Affiliated Hospital of Jilin University, Jilin University, Changchun, Jilin 130021, People's Republic of China
| | - Haoge Luo
- Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin 130021, People's Republic of China
| | - Jiaying Fu
- Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin 130021, People's Republic of China
| | - Yan Jiao
- Department of Hepatobiliary and Pancreatic Surgery, The First Hospital of Jilin University, Changchun, Jilin 130021, People's Republic of China
| | - Yang Li
- Department of Pathophysiology, College of Basic Medical Sciences, Jilin University, Changchun, Jilin 130021, People's Republic of China
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Liu B, Song M, Qin H, Zhang B, Liu Y, Sun Y, Ma Y, Shi T. Phosphoribosyl Pyrophosphate Amidotransferase Promotes the Progression of Thyroid Cancer via Regulating Pyruvate Kinase M2. Onco Targets Ther 2020; 13:7629-7639. [PMID: 32801776 PMCID: PMC7413720 DOI: 10.2147/ott.s253137] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 06/17/2020] [Indexed: 12/26/2022] Open
Abstract
Background Pyruvate kinase is an enzyme that catalyzes the conversion of phosphoenolpyruvate and ADP to pyruvate and ATP in glycolysis and plays a role in regulating cell metabolism. It is reported that the activity of pyruvate kinase is increased in cancers. Phosphoribosyl amidotransferase (PPAT) is reported to be a crucial regulator for pyruvate kinase activity in lung cancer. However, its role in thyroid cancer remains largely unknown. Materials and Methods Immunohistochemical analysis and qRT-PCR were used to detect the expression of PPAT in thyroid cancer samples. Both gain-of-function and loss-of-function models were constructed in thyroid cancer cell lines and the biological functions of PPAT on cellular phenotypes were studied using CCK-8 assay and transwell assay in vitro, respectively. Then, Western blot was used to evaluate the change of PKM2 and downstream signal pathways after PPAT was overexpressed or knocked down. Results Immunohistochemical analysis showed increased expression of PPAT in thyroid cancer tissues, and it was associated with unfavorable pathological characteristics. Knockdown and overexpression assays suggested that altering PPAT expression modulated cell proliferation, migration, and invasion. In terms of mechanism, PPAT could positively regulate the expression of PKM2 and activate ERK and STAT3 signaling pathways. Conclusion PPAT plays crucial roles in regulating proliferation, migration, and invasion of thyroid cancer cells via activating PKM2, ERK, and STAT3.
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Affiliation(s)
- Bing Liu
- The 4th Department of General Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin City 150086, Heilongjiang Province, People's Republic of China
| | - Meiyue Song
- The Pathology Department, The Second Affiliated Hospital of Harbin Medical University, Harbin City 150086, Heilongjiang Province, People's Republic of China
| | - Huadong Qin
- The 4th Department of General Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin City 150086, Heilongjiang Province, People's Republic of China
| | - Bin Zhang
- The 4th Department of General Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin City 150086, Heilongjiang Province, People's Republic of China
| | - Yao Liu
- The 4th Department of General Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin City 150086, Heilongjiang Province, People's Republic of China
| | - Yu Sun
- The 4th Department of General Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin City 150086, Heilongjiang Province, People's Republic of China
| | - Yanfei Ma
- The 4th Department of General Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin City 150086, Heilongjiang Province, People's Republic of China
| | - Tiefeng Shi
- The 4th Department of General Surgery, The Second Affiliated Hospital of Harbin Medical University, Harbin City 150086, Heilongjiang Province, People's Republic of China
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Lebelo MT, Joubert AM, Visagie MH. Warburg effect and its role in tumourigenesis. Arch Pharm Res 2019; 42:833-847. [PMID: 31473944 DOI: 10.1007/s12272-019-01185-2] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 08/27/2019] [Indexed: 12/17/2022]
Abstract
Glucose is a crucial molecule in energy production and produces different end products in non-tumourigenic- and tumourigenic tissue metabolism. Tumourigenic cells oxidise glucose by fermentation and generate lactate and adenosine triphosphate even in the presence of oxygen (Warburg effect). The Na+/H+-antiporter is upregulated in tumourigenic cells resulting in release of lactate- and H+ ions into the extracellular space. Accumulation of lactate- and proton ions in the extracellular space results in an acidic environment that promotes invasion and metastasis. Otto Warburg reported that tumourigenic cells have defective mitochondria that produce less energy. However, decades later it became evident that these mitochondria have adapted with alterations in mitochondrial content, structure, function and activity. Mitochondrial biogenesis and mitophagy regulate the formation of new mitochondria and degradation of defective mitochondria in order to combat accumulation of mutagenic mitochondrial deoxyribonucleic acid. Tumourigenic cells also produce increase reactive oxygen species (ROS) resulting from upregulated glycolysis leading to pathogenesis including cancer. Moderate ROS levels exert proliferative- and prosurvival signaling, while high ROS quantities induce cell death. Understanding the crosstalk between aberrant metabolism, redox regulation, mitochondrial adaptions and pH regulation provides scientific- and medical communities with new opportunities to explore cancer therapies.
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Affiliation(s)
- Maphuti T Lebelo
- Department of Physiology, University of Pretoria, Private Bag X323, Arcadia, Pretoria, 0007, South Africa
| | - Anna M Joubert
- Department of Physiology, University of Pretoria, Private Bag X323, Arcadia, Pretoria, 0007, South Africa
| | - Michelle H Visagie
- Department of Physiology, University of Pretoria, Private Bag X323, Arcadia, Pretoria, 0007, South Africa.
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Schormann N, Hayden KL, Lee P, Banerjee S, Chattopadhyay D. An overview of structure, function, and regulation of pyruvate kinases. Protein Sci 2019; 28:1771-1784. [PMID: 31342570 DOI: 10.1002/pro.3691] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 07/12/2019] [Accepted: 07/12/2019] [Indexed: 12/24/2022]
Abstract
In the last step of glycolysis Pyruvate kinase catalyzes the irreversible conversion of ADP and phosphoenolpyruvate to ATP and pyruvic acid, both crucial for cellular metabolism. Thus pyruvate kinase plays a key role in controlling the metabolic flux and ATP production. The hallmark of the activity of different pyruvate kinases is their tight modulation by a variety of mechanisms including the use of a large number of physiological allosteric effectors in addition to their homotropic regulation by phosphoenolpyruvate. Binding of effectors signals precise and orchestrated movements in selected areas of the protein structure that alter the catalytic action of these evolutionarily conserved enzymes with remarkably conserved architecture and sequences. While the diverse nature of the allosteric effectors has been discussed in the literature, the structural basis of their regulatory effects is still not well understood because of the lack of data representing conformations in various activation states. Results of recent studies on pyruvate kinases of different families suggest that members of evolutionarily related families follow somewhat conserved allosteric strategies but evolutionarily distant members adopt different strategies. Here we review the structure and allosteric properties of pyruvate kinases of different families for which structural data are available.
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Affiliation(s)
- Norbert Schormann
- Department of Biochemistry, University of Alabama at Birmingham, Birmingham, Alabama
| | - Katherine L Hayden
- Department of Chemistry and Physics, Birmingham-Southern College, Birmingham, Alabama
| | - Paul Lee
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Surajit Banerjee
- Northeastern Collaborative Access Team and Department of Chemistry and Chemical Biology, Cornell University, Argonne, Illinois
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Fan Z, He J, Fu T, Zhang W, Yang G, Qu X, Liu R, Lv L, Wang J. Arsenic trioxide inhibits EMT in hepatocellular carcinoma by promoting lncRNA MEG3 via PKM2. Biochem Biophys Res Commun 2019; 513:834-840. [PMID: 31003765 DOI: 10.1016/j.bbrc.2019.04.081] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 04/11/2019] [Indexed: 02/07/2023]
Abstract
Hepatocellular carcinoma (HCC) presents a great burden for patients worldwide, and metastasis of HCC remains problematic. Arsenic trioxide is a traditional drug that has shown excellent efficacy when applied as cancer therapy. Our study explored the antimetastatic mechanism of arsenic trioxide in HCC. We investigated changes in pyruvate kinase muscle isoform 2 (PKM2) and maternal expression gene 3 (MEG3) following treatment with arsenic trioxide in HCC cells. Consequently, arsenic trioxide negatively regulated PKM2 and positively regulated MEG3. We explored migration ability and the expression of the epithelial to mesenchymal transition (EMT)-related biomarkers E-cadherin, N-cadherin and Vimentin by silencing MEG3 under arsenic trioxide treatment. The wound healing assay showed that arsenic trioxide inhibited the migration of HCC, but silencing MEG3 partially reversed this effect. On the other hand, the EMT-related biomarkers are alleviated under the treatment of arsenic trioxide, but this effect deteriorated when MEG3 is silenced. In conclusion, our study demonstrates a novel mechanism by which arsenic trioxide inhibits EMT in hepatocellular carcinoma by promoting lncRNA MEG3 and PKM2 negatively regulating MEG3.
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Affiliation(s)
- Zhuoyang Fan
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, China
| | - Jing He
- MOE Key Laboratory of Metabolism and Molecular Medicine, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, China
| | - Tong Fu
- Shanghai Medical School, Fudan University, China
| | - Wei Zhang
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, China
| | - Guowei Yang
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, China
| | - Xudong Qu
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, China.
| | - Rong Liu
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, China.
| | - Lei Lv
- MOE Key Laboratory of Metabolism and Molecular Medicine, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai, China.
| | - Jianhua Wang
- Department of Interventional Radiology, Zhongshan Hospital, Fudan University, China.
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