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Dai Y, Ying Y, Zhu G, Xu Y, Ji K. STAT3 drives the expression of HIF1alpha in cancer cells through a novel super-enhancer. Biochem Biophys Res Commun 2024; 735:150483. [PMID: 39098275 DOI: 10.1016/j.bbrc.2024.150483] [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: 06/04/2024] [Revised: 07/25/2024] [Accepted: 07/30/2024] [Indexed: 08/06/2024]
Abstract
Aerobic glycolysis is one of the major hallmarks of malignant tumors. This metabolic reprogramming benefits the rapid proliferation of cancer cells, facilitates the formation of tumor microenvironment to support their growth and survival, and impairs the efficacy of various tumor therapies. Therefore, the elucidation of the mechanisms driving aerobic glycolysis in tumors represents a pivotal breakthrough in developing therapeutic strategies for solid tumors. HIF1α serves as a central regulator of aerobic glycolysis with elevated mRNA and protein expression across multiple tumor types. However, the mechanisms contributing to this upregulation remain elusive. This study reports the identification of a novel HIF1α super enhancer (HSE) in multiple cancer cells using bioinformatics analysis, chromosome conformation capture (3C), chromatin immunoprecipitation (ChIP), and CRISPR/Cas9 genome editing techniques. Deletion of HSE in cancer cells significantly reduces the expression of HIF1α, glycolysis, cell proliferation, colony and tumor formation ability, confirming the role of HSE as the enhancer of HIF1α in cancer cells. Particularly, we demonstrated that STAT3 promotes the expression of HIF1α by binding to HSE. The discovery of HSE will help elucidate the pathways driving tumor aerobic glycolysis, offering new therapeutic targets and potentially resolving the bottleneck in solid tumor treatment.
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Affiliation(s)
- Yonghui Dai
- Cancer Research Institute, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Yue Ying
- Cancer Research Institute, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China
| | - Gaoyang Zhu
- Guangzhou Key Laboratory of Maternal-Fetal Medicine, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China
| | - Yang Xu
- Cancer Research Institute, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China; Division of Biological Sciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, 92093-0322, USA.
| | - Kaiyuan Ji
- Cancer Research Institute, School of Basic Medical Sciences, Southern Medical University, Guangzhou, 510515, China; Guangzhou Key Laboratory of Maternal-Fetal Medicine, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China; Medical Research Center, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen, 518033, China.
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Peng Y, Shi R, Yang S, Zhu J. Cuproptosis-related gene DLAT is a biomarker of the prognosis and immune microenvironment of gastric cancer and affects the invasion and migration of cells. Cancer Med 2024; 13:e70012. [PMID: 39031012 PMCID: PMC11258438 DOI: 10.1002/cam4.70012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 06/10/2024] [Accepted: 07/03/2024] [Indexed: 07/22/2024] Open
Abstract
OBJECTIVE Cuproptosis is a novel cell death dependent on mitochondrial respiration and regulated by copper. This study aimed to investigate the cuproptosis-related gene DLAT potential value in gastric cancer (GC). METHODS Bioinformatics was used to analyze DLAT expression. DLAT expression in GC cell lines was detected using qRT-PCR. Cell proliferation ability was assessed using CCK8 and cell cycle assay. Cell migration and invasion were assessed using wound healing and transwell assay. A prognostic assessment was performed through survival and Cox regression analysis. DLAT protein expression was analyzed through HPA immunohistochemistry. Biological functions and processes were analyzed through GO and KEGG enrichment analysis and PPI. Correlation with immune cell infiltration and immune checkpoint genes was analyzed for DLAT. RESULTS DLAT expression was upregulated in GC tissues and cells and correlated with shorter survival for patients. Age, gender, histological typing, lymph node metastasis, and distant metastasis were identified as independent prognostic factors affecting OS in GC. DLAT protein was upregulated in GC. The biological functions and pathways enriched in DLAT were mainly linked to mitochondrial respiration and the TCA cycle. The expression of DLAT was found to be positively correlated with the infiltration of Th and Th2 immune cells and only positively correlated with the expression of the BTN2A1 immune checkpoint gene. CONCLUSION DLAT has the potential to serve as a prognostic assessment factor in GC. The expression of DLAT was correlated with immune infiltration and tumor immune escape, providing a new target for immunotherapy of GC.
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Affiliation(s)
- Yanyu Peng
- Department of Histology and EmbryologyShenyang Medical CollegeShenyangLiaoningChina
| | - Ruimeng Shi
- Shenyang Medical CollegeShenyangLiaoningChina
| | - Siwen Yang
- Shenyang Medical CollegeShenyangLiaoningChina
| | - Jiayi Zhu
- Shenyang Medical CollegeShenyangLiaoningChina
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HIF in Gastric Cancer: Regulation and Therapeutic Target. Molecules 2022; 27:molecules27154893. [PMID: 35956843 PMCID: PMC9370240 DOI: 10.3390/molecules27154893] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 06/25/2022] [Accepted: 06/28/2022] [Indexed: 11/17/2022] Open
Abstract
HIF means hypoxia-inducible factor gene family, and it could regulate various biological processes, including tumor development. In 2021, the FDA approved the new drug Welireg for targeting HIF-2a, and it is mainly used to treat von Hippel-Lindau syndrome, which demonstrated its good prospects in tumor therapy. As the fourth deadliest cancer worldwide, gastric cancer endangers the health of people all across the world. Currently, there are various treatment methods for patients with gastric cancer, but the five-year survival rate of patients with advanced gastric cancer is still not high. Therefore, here we reviewed the regulatory role and target role of HIF in gastric cancer, and provided some references for the treatment of gastric cancer.
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Li M, Che N, Jin Y, Li J, Yang W. CDKN3 Overcomes Bladder Cancer Cisplatin Resistance via LDHA-Dependent Glycolysis Reprogramming. Onco Targets Ther 2022; 15:299-311. [PMID: 35388272 PMCID: PMC8977226 DOI: 10.2147/ott.s358008] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 03/17/2022] [Indexed: 01/04/2023] Open
Abstract
Background Aerobic glycolysis plays an important role in bladder cancer (BLCA) progression and chemoresistance. Cyclin-dependent kinase inhibitor-3 (CDKN3), a dual-specificity protein tyrosine phosphatase, has aberrant upregulation in multiple cancer types and is associated with tumorigenesis. However, the role of CDKN3 in BLCA progression and glycolysis has not been elucidated. Purpose In this study, we investigated the effect and underlying mechanisms of CDKN3 on bladder cancer chemoresistance. Results This study confirmed that CDKN3 was overexpressed in BLCA tissues and promoted proliferation and migration. Additionally, our results showed a CDKN3-dependent mechanism on chemoresistance; chemoresistance cells were transformed into chemosensitivity cells by CDKN3 knockdown. Additionally, we showed that CDKN3 knockdown decreased glycolysis by inhibiting LDHA expression in BLCA chemoresistance cells. The results also proved that LDHA was an important mediator of CDKN3-regulated BLCA resistance. LDHA overexpression reversed glycolysis inhibition and chemosensitivity induced by CDKN3 downregulation. Conclusion These data collectively identified a vital role of CDKN3 in glycolysis and chemoresistance by regulating LDHA expression in BLCA cells, providing a possible therapeutic strategy for treating BLCA.
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Affiliation(s)
- Mengxuan Li
- Human Anatomy and Histoembryology, Yanbian University College of Medicine, Yanji, People’s Republic of China
| | - Nan Che
- Department of Pathology, Yanbian University College of Medicine, Yanji, People’s Republic of China
| | - Yu Jin
- Human Anatomy and Histoembryology, Yanbian University College of Medicine, Yanji, People’s Republic of China
| | - Jinhua Li
- Department of Drug and Device Clinical Trials Institution, Affiliated Hospital of Yanbian University, Yanji, People’s Republic of China
- Jinhua Li, Department of Drug and Device Clinical Trials Institution, Affiliated Hospital of Yanbian University, No. 1827, Juzi Road, Yanji City, 133000, People’s Republic of China, Tel +8613843360437, Email
| | - Wanshan Yang
- Department of Pathology, Yanbian University College of Medicine, Yanji, People’s Republic of China
- Correspondence: Wanshan Yang, Department of Pathology, Yanbian University College of Medicine, No. 977, Gongyuan Road, Yanji City, 133002, People’s Republic of China, Tel +8613944390633, Email
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