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Wang D, Liu X, Li M, Ning J. HIF-1α regulates the cell viability in radioiodine-resistant papillary thyroid carcinoma cells induced by hypoxia through PKM2/NF-κB signaling pathway. Mol Carcinog 2024; 63:238-252. [PMID: 37861358 DOI: 10.1002/mc.23648] [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: 02/19/2023] [Revised: 09/05/2023] [Accepted: 10/01/2023] [Indexed: 10/21/2023]
Abstract
The curative treatment options for papillary thyroid cancer (PTC) encompass surgical intervention, radioactive iodine administration, and chemotherapy. However, the challenges of radioiodine (RAI) resistance, metastasis, and chemotherapy resistance remain inadequately addressed. The objective of this study was to investigate the protective role of hypoxia-inducible factor-1α (HIF-1α) in 131 I-resistant cells and a xenograft model under hypoxic conditions, as well as to explore potential mechanisms. The effects of HIF-1α on 131 I-resistant BCPAP and TPC-1 cells, as well as the xenograft model, were assessed in this study. Cell viability, migration, invasion, and apoptosis rates were measured using Cell Counting Kit-8, wound-healing, Transwell, and flow cytometry assays. Additionally, the expressions of Ki67, matrix metalloproteinase-9 (MMP-9), and pyruvate kinase M2 (PKM2) were examined using immunofluorescence or immunohistochemistry assays. Sodium iodide symporter and PKM2/NF-κBp65 relative protein levels were detected by western blot analysis. The findings of our study indicate that siHIF-1α effectively inhibits cell proliferation, cell migration, and invasion in 131 I-resistant cells under hypoxic conditions. Additionally, the treatment of siHIF-1α leads to alterations in the relative protein levels of Ki67, MMP-9, PKM2, and PKM2/NF-κBp65, both in vivo and in vitro. Notably, the effects of siHIF-1α are modified when DASA-58, an activator of PKM2, is administered. These results collectively demonstrate that siHIF-1α reduces cell viability in PTC cells and rat models, while also mediating the nuclear factor-κB (NF-κB)/PKM2 signaling pathway. Our findings provide a new rationale for further academic and clinical research on RAI-resistant PTC.
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Affiliation(s)
- Dong Wang
- Thyroid Surgery Ward, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China
| | - Xiaoqian Liu
- Department of Hematology, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China
| | - Meijing Li
- Second Department of Hepatobiliary Surgery, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China
| | - Jinyao Ning
- Thyroid Surgery Ward, The Affiliated Yantai Yuhuangding Hospital of Qingdao University, Yantai, Shandong, China
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Shen L, Jiang S, Yang Y, Yang H, Fang Y, Tang M, Zhu R, Xu J, Jiang H. Pan-cancer and single-cell analysis reveal the prognostic value and immune response of NQO1. Front Cell Dev Biol 2023; 11:1174535. [PMID: 37583897 PMCID: PMC10424457 DOI: 10.3389/fcell.2023.1174535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 07/21/2023] [Indexed: 08/17/2023] Open
Abstract
Background: Overexpression of the NAD(P)H: Quinone Oxidoreductase 1 (NQOI) gene has been linked with tumor progression, aggressiveness, drug resistance, and poor patient prognosis. Most research has described the biological function of the NQO1 in certain types and limited samples, but a comprehensive understanding of the NQO1's function and clinical importance at the pan-cancer level is scarce. More research is needed to understand the role of NQO1 in tumor infiltration, and immune checkpoint inhibitors in various cancers are needed. Methods: The NQO1 expression data for 33 types of pan-cancer and their association with the prognosis, pathologic stage, gender, immune cell infiltration, the tumor mutation burden, microsatellite instability, immune checkpoints, enrichment pathways, and the half-maximal inhibitory concentration (IC50) were downloaded from public databases. Results: Our findings indicate that the NQO1 gene was significantly upregulated in most cancer types. The Cox regression analysis showed that overexpression of the NQO1 gene was related to poor OS in Glioma, uveal melanoma, head and neck squamous cell carcinoma, kidney renal papillary cell carcinoma, and adrenocortical carcinoma. NQO1 mRNA expression positively correlated with infiltrating immune cells and checkpoint molecule levels. The single-cell analysis revealed a potential relationship between the NQO1 mRNA expression levels and the infiltration of immune cells and stromal cells in bladder urothelial carcinoma, invasive breast carcinoma, and colorectal cancer. Conversely, a negative association was noted between various drugs (17-AAG, Lapatinib, Trametinib, PD-0325901) and the NQO1 mRNA expression levels. Conclusion: NQO1 expression was significantly associated with prognosis, immune infiltrates, and drug resistance in multiple cancer types. The inhibition of the NQO1-dependent signaling pathways may provide a promising strategy for developing new cancer-targeted therapies.
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Affiliation(s)
- Liping Shen
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical, Taizhou, Zhejiang, China
| | - Shan Jiang
- Department of Radiology, Jining No. 1 People’s Hospital, Jining, Shandong, China
| | - Yu Yang
- Department of Orthopedics, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical, Taizhou, Zhejiang, China
| | - Hongli Yang
- Department of Pathology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China
| | - Yanchun Fang
- Department of Ultrasonography, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical, Taizhou, Zhejiang, China
| | - Meng Tang
- Department of Ultrasonography, Jining No. 1 People’s Hospital, Jining, Shandong, China
| | - Rangteng Zhu
- Department of Orthopedics, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical, Taizhou, Zhejiang, China
| | - Jiaqin Xu
- Department of Clinical Laboratory, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical, Taizhou, Zhejiang, China
| | - Hantao Jiang
- Department of Orthopedics, Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical, Taizhou, Zhejiang, China
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Nalla LV, Khairnar A. Empagliflozin mediated miR-128-3p upregulation promotes differentiation of hypoxic cancer stem-like cells in breast cancer. Eur J Pharmacol 2023; 943:175565. [PMID: 36739077 DOI: 10.1016/j.ejphar.2023.175565] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 01/19/2023] [Accepted: 02/01/2023] [Indexed: 02/05/2023]
Abstract
AIMS The hsa-miR-128-3p expression is downregulated in advanced breast cancer patients. Empagliflozin (EMPA) is an anti-diabetic drug with anticancer potential. The present study investigated the effect of EMPA on cancer cell differentiation by acting as a miR-128-3p mimicking drug in breast cancer. MAIN METHODS Our results first demonstrate SP1 and PKM2 as the downstream effectors of hsa-miR-128-3p. Further, transfection with siPKM2, miR-128-3p mimics, and inhibitors was performed to assess their involvement in cancer stemness using flow cytometry. Further, EMPA as miR-128-3p mimicking drug was screened and explored on cancer cell differentiation. Then, we treated the 4T1-Red-FLuc allograft breast tumor with EMPA to assess its inhibitory potential toward tumor growth using IVIS® Spectrum. Immunohistochemistry was performed to evaluate cancer cell differentiation and cell proliferation. KEY FINDINGS We found that hsa-miR-128-3p is the upstream regulator of SP1 and PKM2 in hypoxic breast cancer cells. Overexpression of miR-128-3p with mimics downregulate SP1 and PKM2, whereas miR-128-3p inhibitor shows an opposite effect. The enhanced expression of miR-128-3p and PKM2 knockdown diminishes hypoxia-induced CD44 expression and enhance CD44+/CD24+ differentiated cells. We also identified EMPA as the miR-128-3p mimicking drug that can enhance the differentiated cell population. Further, EMPA suppressed in vivo tumor growth, lung metastasis, tumor bioluminescence, and cell proliferation. Therefore, EMPA abrogates breast cancer stemness by inactivating SP1 and PKM2 via enhanced miR-128-3p expression. SIGNIFICANCE EMPA could be a promising drug in combination with other chemotherapeutic drugs in advanced breast cancer.
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Affiliation(s)
- Lakshmi Vineela Nalla
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gujarat, India; Department of Pharmacy, Koneru Lakshmaiah Education Foundation, Vaddeswaram, AP, India
| | - Amit Khairnar
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), Ahmedabad, Gujarat, India; International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic ICRC, FNUSA Brno, Czech Republic; Department of Physiology, Faculty of Medicine, Masaryk University, Kamenice 735/5, 625 00, Brno, Czech Republic.
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Hao Z, Wang Y, Li J, Liu W, Zhao W, Wang J. Expression of HIF-1α/PKM2 axis correlates to biological and clinical significance in papillary thyroid carcinoma. Medicine (Baltimore) 2023; 102:e33232. [PMID: 36897686 PMCID: PMC9997831 DOI: 10.1097/md.0000000000033232] [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: 07/13/2022] [Accepted: 02/16/2023] [Indexed: 03/11/2023] Open
Abstract
hypoxia inducible factor-1α (HIF-1α) and pyruvate kinase M2 (PKM2) are 2 key metabolic regulatory proteins, they could engage in a positive feedback loop and drive cancer growth by enhancing glycolysis. This study aimed to investigate the expression of HIF-1α and PKM2 in papillary thyroid carcinoma (PTC) and its correlation with the patients clinicopathological features and with tumor invasion and metastasis. Surgically resected PTC specimens from 60 patients were collected. The expression levels of HIF-1α and PKM2 in PTC tissues were examined by immunohistochemical staining. The full clinical records of all patients were collected to analyze the relevance between HIF-1α and PKM2 expressions and the clinical pathological features of PTC. The results showed that the positive expressions of HIF-1α, PKM2, and HIF-1α/PKM2 axis (HIF-1α+/PKM2+) were all significantly higher in PTC than those in normal thyroid follicular epithelium, and a positive correlation was found between HIF-1α and PKM2 in PTC. Further analysis showed that in PTC, the positive expression of HIF-1α and HIF-1α/PKM2 axis (HIF-1α+/PKM2+) were significantly associated with bigger tumor size, moreover, the positive expressions of HIF-1α, PKM2 and HIF-1α/PKM2 axis (HIF-1α+/PKM2+) were all correlated with capsular invasion and lymph node metastasis, while they were all not correlated with gender, sex and multicentricity of tumor. This study identified HIF-1a/PKM2 axis as potential molecular marker for predicting the invasion and progression of papillary thyroid carcinoma.
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Affiliation(s)
- Zengfang Hao
- Department of Pathology, The Second Hospital, Hebei Medical University, Shijiazhuang, China
| | - Yuan Wang
- Department of Pathology, The Second Hospital, Hebei Medical University, Shijiazhuang, China
| | - Jiajun Li
- Department of Pharmacology, Hebei Medical University, Shijiazhuang, China
| | - Weina Liu
- Department of Pathology, The Second Hospital, Hebei Medical University, Shijiazhuang, China
| | - Wei Zhao
- Department of Pathology, The Second Hospital, Hebei Medical University, Shijiazhuang, China
| | - Juan Wang
- Department of Pathology, The Second Hospital, Hebei Medical University, Shijiazhuang, China
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Anti-Leukemic Activity of Brassica-Derived Bioactive Compounds in HL-60 Myeloid Leukemia Cells. Int J Mol Sci 2022; 23:ijms232113400. [DOI: 10.3390/ijms232113400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 10/24/2022] [Accepted: 10/29/2022] [Indexed: 11/06/2022] Open
Abstract
Acute myeloid leukemia (AML) is a cancer of the myeloid blood cells mainly treated with chemotherapy for cancer remission, but this non-selective treatment also induces numerous side effects. Investigations with bioactive compounds from plant-derived foods against cancer have increased in the last years because there is an urgent need to search for new anti-leukemic agents possessing higher efficacy and selectivity for AML cells and fewer negative side effects. In this study, we analyzed the anti-leukemic activity of several phytochemicals that are representative of the major classes of compounds present in cruciferous foods (glucosinolates, isothiocyanates, hydroxycinnamic acids, flavonols, and anthocyanins) in the human acute myeloid leukemia cell line HL-60. Our results revealed that among the different Brassica-derived compounds assayed, sulforaphane (SFN) (an aliphatic isothiocyanate) showed the most potent anti-leukemic activity with an IC50 value of 6 µM in dose-response MTT assays after 48 h of treatment. On the other hand, chlorogenic acid (a hydroxycinnamic acid) and cyanidin-3-glucoside (an anthocyanin) also displayed anti-leukemic potential, with IC50 values of 7 µM and 17 µM after 48 h of incubation, respectively. Importantly, these compounds did not show significant cell toxicity in macrophages-like differentiated cells at 10 and 25 µM, indicating that their cytotoxic effects were specific to AML cancer cells. Finally, we found that these three compounds were able to induce the NRF2/KEAP1 signaling pathway in a dose-dependent manner, highlighting SFN as the most potent NRF2 activator. Overall, the present evidence shed light on the potential for using foods and ingredients rich in anticancer bioactive phytochemicals from Brassica spp.
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Zhang H, Guan R, Zhang Z, Li D, Xu J, Gong Y, Chen X, Lu W. LncRNA Nqo1-AS1 Attenuates Cigarette Smoke-Induced Oxidative Stress by Upregulating its Natural Antisense Transcript Nqo1. Front Pharmacol 2021; 12:729062. [PMID: 34566651 PMCID: PMC8456124 DOI: 10.3389/fphar.2021.729062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 08/27/2021] [Indexed: 11/22/2022] Open
Abstract
Evidence of the involvement of long noncoding RNAs (lncRNAs) in the pathogenesis of chronic obstructive pulmonary disease (COPD) is growing but still largely unknown. This study aims to explore the expression, functions and molecular mechanisms of Fantom3_F830212L20, a lncRNA that transcribes in an antisense orientation to Nqo1.We name this lncRNA as Nqo1 antisense transcript 1 (Nqo1-AS1). The distribution, expression level and protein coding potential of Nqo1-AS1 were determined. The effects of Nqo1-AS1 on cigarette smoke (CS)-induced oxidative stress were also evaluated. The results showed that Nqo1-AS1 were mainly located in the cytoplasm of mouse alveolar epithelium and had a very low protein coding potential. Nqo1-AS1 (or its human homologue) was increased with the increase of CS exposure. Nqo1-AS1 overexpression enhanced the mRNA and protein levels of Nqo1 and Serpina1 mRNA expression, and attenuated CS-induced oxidative stress, whereas knockdown of Nqo1-AS1 significantly decreased Nqo1 and Serpina1 mRNA expressions, and aggravated CS-induced oxidative stress. Nqo1-AS1 increased Nqo1 mRNA stability and upregulated Nqo1 expression through antisense pairing with Nqo1 3′UTR. In conclusion, these results suggest that Nqo1-AS1 attenuates CS-induced oxidative stress by increasing Nqo1 mRNA stability and upregulating Nqo1 expression, which might serve as a novel approach for the treatment of COPD.
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Affiliation(s)
- Haiyun Zhang
- Department of Pulmonary and Critical Care Medicine, Zhujiang Hosptial, Southern Medical University, Guangzhou, China.,State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Ruijuan Guan
- State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zili Zhang
- State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Defu Li
- State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jingyi Xu
- State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yuxin Gong
- Department of Pulmonary and Critical Care Medicine, Zhujiang Hosptial, Southern Medical University, Guangzhou, China
| | - Xin Chen
- Department of Pulmonary and Critical Care Medicine, Zhujiang Hosptial, Southern Medical University, Guangzhou, China
| | - Wenju Lu
- State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
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Li H, Yan M, Wu X, Wang Y, Huang L. Expression and clinical significance of pyruvate kinase M2 in breast cancer: A protocol for meta-analysis and bioinformatics validation analysis. Medicine (Baltimore) 2021; 100:e25545. [PMID: 33950928 PMCID: PMC8104244 DOI: 10.1097/md.0000000000025545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 03/26/2021] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Breast cancer is a common malignant tumor in women. In recent years, its incidence is increasing year by year, and its morbidity and mortality rank the first place among female malignant tumors. Some key enzymes and intermediates in glycolysis are closely related to tumor development. Pyruvate kinase M2 (PKM2) is an important rate-limiting enzyme in glycolysis pathway. Meanwhile, it is highly expressed in proliferative cells, especially in tumor cells, and plays an important role in the formation of Warburg effect and tumorigenesis. Previous studies have explored the effects of PKM2 expression on the prognosis and clinical significance of breast cancer patients, while the results are contradictory and uncertain. This study uses controversial data for meta-analysis to accurately evaluate the problem. We collected relevant Oncomine and The Cancer Genome Atlas (TCGA) data to further verify the results. Through bioinformatics analysis, the mechanism and related pathways of PKM2 in breast cancer are explored. METHODS We searched Wanfang, Chinese Biomedical Literature Database, Chinese National Knowledge Infrastructure, the Chongqing VIP Chinese Science and Technology Periodical Database, PubMed, Embase, and Web of Science databases from inception to March 2021. The language restrictions are Chinese and English. The published literatures on PKM2 expression and prognosis or clinicopathological characteristics of breast cancer patients were statistically analyzed. Combined hazard ratios (HRs), odds ratios (ORs), and 95% confidence intervals (95% CIs) were used to evaluate the effects of PKM2 on the prognosis and clinicopathological features of breast cancer. Stata 14.0 software was applied for meta-analysis. Oncomine and TCGA databases were used to meta-analyze the differences of PKM2 mRNA expression between breast cancer and normal breast tissues. The expression of PKM2 protein was verified by Human Protein Atlas (HPA) database. The relationship between the gene and the survival of breast cancer patients was analyzed by Gene Expression Profiling Interactive Analysis (GEPIA). The relationship between PKM2 gene and clinicopathological characteristics was analyzed by using LinkedOmics, and the Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment pathway analysis was performed by using Metascape. Protein-protein interaction (PPI) network was constructed by String website. RESULTS The results of this meta-analysis will be submitted to a peer-reviewed journal for publication. CONCLUSION This study provides high-quality medical evidence for the correlation between the expression of PKM2 and the prognosis and clinicopathological features of breast cancer. Through bioinformatics analysis, this study further deepens the understanding of the mechanism and related pathways of PKM2 in breast cancer. ETHICS AND DISSEMINATION The private information from individuals will not be published. This systematic review also should not damage participants' rights. Ethical approval is not available. The results may be published in a peer-reviewed journal or disseminated in relevant conferences. OSF REGISTRATION NUMBER DOI 10.17605/OSF.IO/W52HB.
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Chinese Poplar Propolis Inhibits MDA-MB-231 Cell Proliferation in an Inflammatory Microenvironment by Targeting Enzymes of the Glycolytic Pathway. J Immunol Res 2021; 2021:6641341. [PMID: 33628847 PMCID: PMC7899755 DOI: 10.1155/2021/6641341] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/24/2021] [Accepted: 02/02/2021] [Indexed: 02/08/2023] Open
Abstract
Propolis is rich in flavonoids and has excellent antitumor activity. However, little is known about the potential effects of propolis on glycolysis in tumor cells. Here, the antitumor effects of propolis against human breast cancer MDA-MB-231 cells in an inflammatory microenvironment stimulated with lipopolysaccharide (LPS) were investigated by assessing the key enzymes of glycolysis. Propolis treatment obviously inhibited MDA-MB-231 cell proliferation, migration and invasion, clone forming, and angiogenesis. Proinflammatory mediators, including tumor necrosis factor-alpha (TNF-α), interleukin (IL)-1β, and IL-6, as well as NLRP3 inflammasomes, were decreased following propolis treatment when compared with the LPS group. Moreover, propolis treatment significantly downregulated the levels of key enzymes of glycolysis–hexokinase 2 (HK2), phosphofructokinase (PFK), pyruvate kinase muscle isozyme M2 (PKM2), and lactate dehydrogenase A (LDHA) in MDA-MB-231 cells stimulated with LPS. After treatment with 2-deoxy-D-glucose (2-DG), an inhibitor of glycolysis, the inhibitory effect of propolis on migration was not significant when compared with the LPS group. In addition, propolis increased reactive oxygen species (ROS) levels and decreased mitochondrial membrane potential. Taken together, these results indicated that propolis targeted key enzymes of glycolysis to suppress the proliferation of MDA-MB-231 cells in an inflammatory microenvironment. These studies provide a molecular basis for propolis as a natural anticancer agent against breast cancer.
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Zhan WL, Gao N, Tu GL, Tang H, Gao L, Xia Y. LncRNA LINC00689 Promotes the Tumorigenesis of Glioma via Mediation of miR-526b-3p/IGF2BP1 Axis. Neuromolecular Med 2021; 23:383-394. [PMID: 33389570 DOI: 10.1007/s12017-020-08635-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 11/22/2020] [Indexed: 12/14/2022]
Abstract
Glioma ranks first among the aggressive brain tumors all over the world. LncRNA LINC00689 has been confirmed to play key roles in the progression of cancers, and LINC00689 was upregulated in glioma. However, the biological function of LINC00689 in glioma is unclear. qRT-PCR was applied to detect the expressions of LINC00689 and miR-526b-3p in glioma cells. Dual-luciferase report was performed to examine the relation among LINC00689, miR-526b-3p, and insulin-like growth factor 2 mRNA-binding protein 1 (IGF2BP1). Then, the growth, migration, and invasion of glioma cells were detected by colony formation, flow cytometry, and transwell assay, respectively. The expressions of p21, cleaved caspase 3, and MAPK signaling-related proteins in glioma cells were tested by western blotting. Finally, xenograft mice model was established to detect the effect of LINC00689 on tumor growth of glioma in vivo. LINC00689 was upregulated in glioma cells, while miR-526b-3p was downregulated. In addition, LINC00689 bound to miR-526b-3p, and IGFBP1 was targeted by miR-526b-3p. Moreover, LINC00689 knockdown or upregulation of miR-526b-3p inhibited the proliferation of glioma cells and induced the apoptosis. Consistently, the migration and invasion of glioma cells were notably reduced by LINC00689 shRNA/miR-526-3p mimics. miR-526b-3p inhibitor or IGF2BP1 upregulation could reverse the effect of LINC00689 knockdown or miR-526b-3p mimics. Finally, knockdown of LINC00689 inhibited the tumor growth of glioma in vivo through regulating miR-526b-3p/IGF2BP1/MAPK axis. In conclusion, silencing of LINC00689 could inhibit the tumorigenesis of glioma via mediation of miR-526b-3p/IGF2BP1 axis. LINC00689 may serve as a new target for the treatment of glioma.
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Affiliation(s)
- Wen-Liang Zhan
- Department of Neurosurgery, Affiliated Haikou Hospital at Xiangya Medical College, Central South University, No.43, People's Avenue, Haidian Island, Haikou, 570208, Hainan Province, People's Republic of China
| | - Ning Gao
- Department of Neurosurgery, Affiliated Haikou Hospital at Xiangya Medical College, Central South University, No.43, People's Avenue, Haidian Island, Haikou, 570208, Hainan Province, People's Republic of China
| | - Guo-Long Tu
- Department of Neurosurgery, Affiliated Haikou Hospital at Xiangya Medical College, Central South University, No.43, People's Avenue, Haidian Island, Haikou, 570208, Hainan Province, People's Republic of China
| | - Hong Tang
- Department of Neurosurgery, Affiliated Haikou Hospital at Xiangya Medical College, Central South University, No.43, People's Avenue, Haidian Island, Haikou, 570208, Hainan Province, People's Republic of China
| | - Ling Gao
- Department of Neurosurgery, Affiliated Haikou Hospital at Xiangya Medical College, Central South University, No.43, People's Avenue, Haidian Island, Haikou, 570208, Hainan Province, People's Republic of China
| | - Ying Xia
- Department of Neurosurgery, Affiliated Haikou Hospital at Xiangya Medical College, Central South University, No.43, People's Avenue, Haidian Island, Haikou, 570208, Hainan Province, People's Republic of China.
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