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Zhang Y, Zhu Y, Wang S, Feng YC, Li H. Erythropoietin receptor is a risk factor for prognosis: A potential biomarker in lung adenocarcinoma. Pathol Res Pract 2023; 251:154891. [PMID: 37844485 DOI: 10.1016/j.prp.2023.154891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 10/10/2023] [Accepted: 10/12/2023] [Indexed: 10/18/2023]
Abstract
Lung cancer has the highest mortality rate of all cancers, and LUAD's survival rate is particularly poor. Erythropoietin receptor (EPOR) can be detected in lung adenocarcinoma (LUAD), however, the expression levels and prognostic value of EPOR in LUAD are still unclear. In our study, clinicopathological data of 92 LUAD patients between January 2008 and June 2016, multiple bioinformatics databases and immunohistochemistry were used to explore the EPOR expression, the mutant genes affecting EPOR expression, and the correlation of EPOR expression with oxidative stress - related genes, prognosis, immune microenvironment. All statistical analyses were performed in the R version 4.1.1. The study found that EPOR expression might be down-regulated at the mRNA levels and significantly up-regulated at the protein levels in LUAD, which indicates that the mRNA and protein levels of EPOR are inconsistent. The muTarget showed that the expression of EPOR was significantly different between the mutant group and the wild group of 15 genes, including DDX60L and C1orf168. Importantly, we found that EPOR was associated with VEGF and HIF family members, and had significant positive correlation with oxidative stress - related genes such as CCS, EPX and TXNRD2. This suggests that EPOR may be involved in the regulation of oxidative stress. The Kaplan-Meier Plotter and PrognoScan databases consistently concluded that EPOR was associated with prognosis in LUAD patients. Our clinicopathological data showed that high EPOR expression was associated with poorer overall survival (29.5 vs 46 months) and had a good predictive ability for 4-year and 5-year survival probability. EPOR is expected to be a potential new prognostic marker for LUAD.
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Affiliation(s)
- Yajing Zhang
- Clinical Laboratory Center, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China; Xinjiang Key Laboratory of Oncology, Tumor Hospital Affiliated to Xinjiang Medical University, Xinjiang, China
| | - Yousen Zhu
- Clinical Laboratory Center, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China
| | - Senyu Wang
- Xinjiang Key Laboratory of Oncology, Tumor Hospital Affiliated to Xinjiang Medical University, Xinjiang, China
| | - Yang Chun Feng
- Xinjiang Key Laboratory of Oncology, Tumor Hospital Affiliated to Xinjiang Medical University, Xinjiang, China.
| | - Hui Li
- Clinical Laboratory Center, The First Affiliated Hospital of Xinjiang Medical University, Xinjiang, China.
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Zhang Y, Feng Y, Sun X. Recombinant human erythropoietin accelerated the proliferation of non‐small cell lung cancer cell lines and reduced the expression of VEGF, HIF‐1α, and PD‐L1 under a simulated hypoxic environment in vitro. Chronic Dis Transl Med 2022; 8:124-133. [PMID: 35774428 PMCID: PMC9215718 DOI: 10.1002/cdt3.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 12/09/2021] [Indexed: 11/11/2022] Open
Affiliation(s)
- Yajing Zhang
- Department of Laboratory Affiliated Cancer Hospital of Xinjiang Medical University Urumqi Xinjiang 830011 China
| | - Yangchun Feng
- Department of Laboratory Affiliated Cancer Hospital of Xinjiang Medical University Urumqi Xinjiang 830011 China
| | - Xiaojie Sun
- Department of Blood Transfusion Affiliated Cancer Hospital of Xinjiang Medical University Urumqi Xinjiang 830011 China
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Tang Z, Yang G, Wang X, Chen F, Liao Z, Zhang Z, Liu Z, Zeng W, Fang M, Wang W, Sun X, Huo G. AKT/GSK-3β/β-catenin signaling pathway participates in erythropoietin-promoted glioma proliferation. J Neurooncol 2020; 149:231-242. [PMID: 32909117 DOI: 10.1007/s11060-020-03602-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 08/23/2020] [Indexed: 02/06/2023]
Abstract
PURPOSE Although erythropoietin (EPO) has been proven to significantly promote the proliferation of cancer cells, the mechanism for promoting glioma proliferation is poorly understood. Here, we examined the functional role of the AKT/GSK-3β/β-catenin signaling pathway in the EPO-mediated proliferation of glioma. METHODS The distribution of EPO and Ki-67 among clinical samples with different WHO grades was plotted by Immunological Histological Chemistry analysis. U87 and U251 glioma cell lines were treated with short hairpin RNA targeting (shEPO), recombinant human erythropoietin (rhEPO) and/or AKT-specific inhibitor (MK-2206). The changes in phosphorylated AKT, nuclear β-catenin, cyclin D1 and p27kip1 expression were detected. Cell cycle distributions and glioma proliferation in vitro and in vivo were analyzed. RESULTS The expression level of EPO was significantly elevated with the increase of WHO grade and Ki67 in clinical glioma specimens. In vitro, knockdown of endogenous EPO in U87 and U251 cells effectively block the phosphorylation of AKT and GSK-3β and the expression of nuclear β-catenin. shEPO treatment also significantly decreased the expression of cyclin D1 and increased the expression of p27kip1. The cell cycle transition then slowed down and the proliferation of glioma cells or mouse xenograft tumors both decreased. Treatment of cells or tumors with extra rhEPO reversed the above biological effects mediated by shEPO. rhEPO-induced activation of the AKT/GSK-3β/β-catenin pathway and proliferation were abolished by MK-2206. CONCLUSIONS Our study identified the AKT/GSK-3β/β-catenin axis as a critical mediator of EPO-induced glioma proliferation and further provided a clinically significant dimension to the biology of EPO.
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Affiliation(s)
- Zhaohua Tang
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Chongqing, 400016, China
| | - Gang Yang
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Chongqing, 400016, China
| | - Xiaoshu Wang
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Chongqing, 400016, China
| | - Feilan Chen
- Laboratory Animal Centre, Chongqing Medical University, No. 1 Youyi Road, Chongqing, 400016, China
| | - Zhengbu Liao
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Chongqing, 400016, China
| | - Zhiwei Zhang
- Laboratory of Medical Molecular Biology, Chongqing Medical University, Chongqing, 400016, China
| | - Zili Liu
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Chongqing, 400016, China
| | - Wenxin Zeng
- Laboratory of Medical Molecular Biology, Chongqing Medical University, Chongqing, 400016, China
| | - Min Fang
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Chongqing, 400016, China
| | - Wentao Wang
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Chongqing, 400016, China
| | - Xiaochuan Sun
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Chongqing, 400016, China
| | - Gang Huo
- Department of Neurosurgery, The First Affiliated Hospital of Chongqing Medical University, No. 1 Youyi Road, Chongqing, 400016, China.
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Su T, Liu P, Ti X, Wu S, Xue X, Wang Z, Dioum E, Zhang Q. ΗΙF1α, EGR1 and SP1 co-regulate the erythropoietin receptor expression under hypoxia: an essential role in the growth of non-small cell lung cancer cells. Cell Commun Signal 2019; 17:152. [PMID: 31752873 PMCID: PMC6869211 DOI: 10.1186/s12964-019-0458-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 10/10/2019] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Overexpression of erythropoietin (EPO) and EPO receptor (EPO-R) is associated with poor prognosis in non-small-cell lung carcinoma (NSCLC). Hypoxia, a potent EPO inducer, is a major stimulating factor in the growth of solid tumors. However, how EPO-R expression is regulated under hypoxia is largely unknown. METHODS The role of EPO-R in NSCLC cell proliferation was assessed by RNA interference in vitro. Luciferase reporter assays were performed to map the promoter elements involved in the EPO-R mRNA transcription. Nuclear co-immunoprecipitation and chromatin immunoprecipitation were performed to assess the interaction among transcription factors HIF1α, SP1, and EGR1 in the regulation of EPO-R under hypoxia. The expression of key EPO-R transcription factors in clinical specimens were determined by immunohistochemistry. RESULTS Hypoxia induced a dosage and time dependent EPO-R mRNA expression in NSCLC cells. Knockdown of EPO-R reduced NSCLC cell growth under hypoxia (P < 0.05). Mechanistically, a SP1-EGR1 overlapped DNA binding sequence was essential to the hypoxia induced EPO-R transcription. In the early phase of hypoxia, HIF1α interacted with EGR1 that negatively regulated EPO-R. With the exit of EGR1 in late phase, HIF1α positively regulated EPO-R expression through additive interaction with SP1. In clinical NSCLC specimen, SP1 was positively while EGR1 was negatively associated with active EPO-R expression (P < 0.05). CONCLUSIONS HIF1α, SP1 and EGR1 mediated EPO-R expression played an essential role in hypoxia-induced NSCLC cell proliferation. Our study presents a novel mechanism of EPO-R regulation in the tumor cells, which may provide information support for NSCLC diagnosis and treatment.
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Affiliation(s)
- Tianhong Su
- Department of Medicine, Center for Esophageal Diseases, Baylor University Medical Center and Center for Esophageal Research, Baylor Scott & White Research Institute, 2 Hoblitzelle, Suite 252, 3500 Gaston Avenue, Dallas, TX, 75246, USA
- Department of Liver Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, Guangdong, China
| | - Pi Liu
- Department of Medicine, Center for Esophageal Diseases, Baylor University Medical Center and Center for Esophageal Research, Baylor Scott & White Research Institute, 2 Hoblitzelle, Suite 252, 3500 Gaston Avenue, Dallas, TX, 75246, USA
- Department of Gastroenterology, the First Affiliated Hospital of Nanchang University, Nanchang, 330006, Jiangxi, China
| | - Xinyu Ti
- Department of Respiratory Medicine, the Fourth Military Medical University, Xi'an, 710032, China
| | - Shouzhen Wu
- Shaanxi Institute of Pediatric Diseases, Xi'an Children's Hospital, Xi'an, 710003, China
| | - Xiaochang Xue
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xi'an, 710032, China
- Present Address: Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwestern China, College of Life Sciences, Shaanxi Normal University, Xi'an, China
| | - Zenglu Wang
- State Key Laboratory of Cancer Biology, Biotechnology Center, School of Pharmacy, The Fourth Military Medical University, Xi'an, 710032, China
| | - Elhardji Dioum
- Department of Pharmacology, Department of Internal Medicine, the University of Texas Southwestern Medical School, Dallas, TX, 75390, USA
- Present Address: Diabetes Department, Nestle Institute of Health Science, EPFL Campus, 1015, Lausanne, Switzerland
| | - Qiuyang Zhang
- Department of Medicine, Center for Esophageal Diseases, Baylor University Medical Center and Center for Esophageal Research, Baylor Scott & White Research Institute, 2 Hoblitzelle, Suite 252, 3500 Gaston Avenue, Dallas, TX, 75246, USA.
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