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Liu Y, Xiang Q, Yang T, Wang J, Li H. LINC01806 Promotes Breast Cancer Growth and Metastasis via Sponging miR-1286 to Disinhibit ZEB1 Expression. Biochem Genet 2024; 62:1977-1993. [PMID: 37812283 DOI: 10.1007/s10528-023-10507-5] [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: 04/27/2023] [Accepted: 08/22/2023] [Indexed: 10/10/2023]
Abstract
Breast cancer (BC) is the most abundant and aggressive cancer that impacts millions of women with poorly understood mechanisms. Here, we aimed to investigate the function of LINC01806 in BC development. Human BC tissues and nearby normal specimens were taken from diagnosed BC patients. The expression levels of LINC01806, miR-1286, ZEB1, and EMT-related markers were evaluated by qRT-PCR and western blotting. FISH was used to visualize the subcellular localization of LINC01806. The viability, proliferation, migration and invasion capacities of BC cells were assessed by MTT, colony formation, and transwell assays. Interactions among LINC01806, miR-1286 and ZEB1 were validated by dual luciferase assay. The unpaired Student t-test (for two groups) or one-way ANOVA following with Tukey post-hoc test (for more than three groups) was employed for statistical analysis. LINC01806 level was elevated in BC tissues. Knockdown of LINC01806 suppressed EMT process and BC cell proliferation, migration, and invasion. LINC01806 co-localized and directly bound with miR-1286 in the cytoplasm. MiR-1286 inhibitor blocked the effects of LINC01806 knockdown on BC cell EMT, proliferation and migration. MiR-1286 targeted ZEB1 and overexpression of ZEB1 blocked the regulatory functions of miR-1286 mimics in BC. LINC01806 facilitates EMT and accelerates BC cell proliferation, migration, and invasion via acting as miR-1286 sponge to disinhibit ZEB1 expression.
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Affiliation(s)
- Yuxiang Liu
- The Hunan Provincial University Key Laboratory of the Fundamental and Clinical Research on Functional Nucleic Acid & Medical Examination Institute, Changsha Medical University, 1501 Leifeng Dadao, Wangcheng District, Changsha, 410219, Hunan Province, China
- Hunan Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, Changsha Medical University, Changsha, 410219, Hunan Province, China
| | - Qin Xiang
- Department of Basic Biology, Changsha Medical University, Changsha, 410219, Hunan Province, China
| | - Tongwang Yang
- The Hunan Provincial University Key Laboratory of the Fundamental and Clinical Research on Functional Nucleic Acid & Medical Examination Institute, Changsha Medical University, 1501 Leifeng Dadao, Wangcheng District, Changsha, 410219, Hunan Province, China
| | - Jing Wang
- The Hunan Provincial University Key Laboratory of the Fundamental and Clinical Research on Functional Nucleic Acid & Medical Examination Institute, Changsha Medical University, 1501 Leifeng Dadao, Wangcheng District, Changsha, 410219, Hunan Province, China
| | - Hongde Li
- The Hunan Provincial University Key Laboratory of the Fundamental and Clinical Research on Functional Nucleic Acid & Medical Examination Institute, Changsha Medical University, 1501 Leifeng Dadao, Wangcheng District, Changsha, 410219, Hunan Province, China.
- Medical Examination Institute, Changsha Medical University, Changsha, 410219, Hunan Province, China.
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Shen L, Zhang C, Zhu G. Low-density lipoprotein receptor-related protein 5/6 promotes endometrial cancer progression and cancer cell immune escape. J Biochem Mol Toxicol 2024; 38:e23677. [PMID: 38528715 DOI: 10.1002/jbt.23677] [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: 03/01/2023] [Revised: 01/02/2024] [Accepted: 02/23/2024] [Indexed: 03/27/2024]
Abstract
The study investigated the potential association of the low-density lipoprotein (LDL) genome with endometrial cancer progression based on the Gene Expression Omnibus data set and The Cancer Genome Atlas data set. Differential and weighted gene coexpression network analysis was performed on endometrial cancer transcriptome datasets GSE9750 and GSE106191. The protein-protein interaction network was built using LDL-receptor proteins and the top 50 tumor-associated genes. Low-density lipoprotein-related receptors 5/6 (LRP5/6) in endometrial cancer tissues were correlated with oncogenes, cell cycle-related genes, and immunological checkpoints using Spearman correlation. MethPrimer predicted the LRP5/6 promoter CpG island. LRP2, LRP6, LRP8, LRP12, low-density lipoprotein receptor-related protein-associated protein, and LRP5 were major LDL-receptor-related genes associated with endometrial cancer. LRP5/6 was enriched in various cancer-related pathways and may be a key LDL-receptor-related gene in cancer progression. LRP5/6 may be involved in the proliferation process of endometrial cancer cells by promoting the expression of cell cycle-related genes. LRP5/6 may be involved in the proliferation of endometrial cancer cells by promoting the expression of cell cycle-related genes. LRP5/6 may promote the immune escape of cancer cells by promoting the expression of immune checkpoints, promoting endometrial cancer progression. The MethPrimer database predicted that the LRP5/6 promoter region contained many CpG islands, suggesting that DNA methylation can occur in the LRP5/6 promoter region. LRP5/6 may aggravate endometrial cancer by activating the phosphoinositide 3-kinase/protein kinase B pathway.
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Affiliation(s)
- Lifan Shen
- Department of Gynecology, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University), Haikou, Hainan, China
| | - Chen Zhang
- Department of Central Lab, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University), Haikou, Hainan, China
| | - Genhai Zhu
- Department of Gynecology, Hainan General Hospital (Hainan Affiliated Hospital of Hainan Medical University), Haikou, Hainan, China
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Tao S, Wang J, Li F, Shi B, Ren Q, Zhuang Y, Qian X. Extracellular vesicles released by hypoxia-induced tumor-associated fibroblasts impart chemoresistance to breast cancer cells via long noncoding RNA H19 delivery. FASEB J 2024; 38:e23165. [PMID: 38197195 DOI: 10.1096/fj.202300203r] [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: 02/05/2023] [Revised: 07/11/2023] [Accepted: 08/14/2023] [Indexed: 01/11/2024]
Abstract
Recently, extracellular vesicles (EVs) have been emphasized in regulating the hypoxic tumor microenvironment of breast cancer (BC), where tumor-associated fibroblasts (TAFs) play a significant role. In this study, we describe possible molecular mechanisms behind the pro-tumoral effects of EVs, secreted by hypoxia (HP)-induced TAFs, on BC cell growth, metastasis, and chemoresistance. These mechanisms are based on long noncoding RNA H19 (H19) identified by microarray analysis. We employed an in silico approach to identify differentially expressed lncRNAs that were associated with BC. Subsequently, we explored possible downstream regulatory mechanisms. We isolated EVs from TAFs that were exposed to HP, and these EVs were denoted as HP-TAF-EVs henceforth. MTT, transwell, flow cytometry, and TUNEL assays were performed to assess the malignant phenotypes of BC cells. A paclitaxel (TAX)-resistant BC cell line was constructed, and xenograft tumor and lung metastasis models were established in nude mice for in vivo verification. Our observation revealed that lncRNA H19 was significantly overexpressed, whereas miR-497 was notably downregulated in BC. HP induced activation of TAFs and stimulated the secretion of EVs. Coculture of HP-TAF-EVs and BC cells led to an increase in TAX resistance of the latter. HP-TAF-EVs upregulated methylation of miR-497 by delivering lncRNA H19, which recruited DNMT1, thus lowering the expression of miR-497. In addition, lncRNA H19-containing HP-TAF-EVs hindered miR-497 expression, enhancing tumorigenesis and TAX resistance of BC cells in vivo. Our study presents evidence for the contribution of lncRNA H19-containing HP-TAF-EVs in the reduction of miR-497 expression through the recruitment of DNMT1, which in turn promotes the growth, metastasis, and chemoresistance of BC cells.
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Affiliation(s)
- Shuang Tao
- Department of Breast Surgery, Wujin Hospital Affiliated with Jiangsu University, Changzhou, P.R. China
- Department of Breast Surgery, The Wujin Clinical College, Xuzhou Medical University, Xuzhou, P.R. China
- Comprehensive Cancer Center, Nanjing Drum Tower Hospital Clinical College, Nanjing Medical University, Nanjing, China
| | - Jian Wang
- Department of Oncological Surgery, Cancer Hospital of Yixing City, Yixing, P.R. China
| | - Fang Li
- Department of Ultrasound, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Bixia Shi
- Department of Breast Surgery, Wujin Hospital Affiliated with Jiangsu University, Changzhou, P.R. China
- Department of Breast Surgery, The Wujin Clinical College, Xuzhou Medical University, Xuzhou, P.R. China
| | - Quanhai Ren
- Department of Breast Surgery, Wujin Hospital Affiliated with Jiangsu University, Changzhou, P.R. China
- Department of Breast Surgery, The Wujin Clinical College, Xuzhou Medical University, Xuzhou, P.R. China
| | - Yuhong Zhuang
- Department of Breast Surgery, Wujin Hospital Affiliated with Jiangsu University, Changzhou, P.R. China
- Department of Breast Surgery, The Wujin Clinical College, Xuzhou Medical University, Xuzhou, P.R. China
| | - Xiaoping Qian
- Comprehensive Cancer Center, Nanjing Drum Tower Hospital Clinical College, Nanjing Medical University, Nanjing, China
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Li P, Hong J, Liang C, Li Y, Gao L, Wu L, Yao R, Zhang Y. Endothelial cell-released extracellular vesicles trigger pyroptosis and vascular inflammation to induce atherosclerosis through the delivery of HIF1A-AS2. FASEB J 2023; 37:e22942. [PMID: 37178006 DOI: 10.1096/fj.202201399rrr] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 04/04/2023] [Accepted: 04/17/2023] [Indexed: 05/15/2023]
Abstract
Extracellular vesicles (EVs) possess great potential in the modulation of cardiovascular diseases. Our current work intended to assay the clinical significance of endothelial cell (EC)-derived EVs in atherosclerosis (AS). Expression of HIF1A-AS2, miR-455-5p, and ESRRG in plasma from AS patients and mice and EVs from ox-LDL-treated ECs was measured. Interactions among HIF1A-AS2, miR-455-5p, ESRRG, and NLRP3 were analyzed. Next, EVs were co-cultured with ECs, and ectopic expression and depletion experimentations of HIF1A-AS2, miR-455-5p, ESRRG, and/or NLRP3 were carried out to assay their roles in pyroptosis and inflammation of ECs in AS. At last, the effects of HIF1A-AS2 shuttled by EC-derived EVs on EC pyroptosis and vascular inflammation in AS were verified in vivo. HIF1A-AS2 and ESRRG were highly expressed, while miR-455-5p was poorly expressed in AS. HIF1A-AS2 could sponge miR-455-5p to elevate the expression of ESRRG and NLRP3. Both in vitro and in vivo experiments revealed that ECs-derived EVs carrying HIF1A-AS2 induced the pyroptosis and vascular inflammation of ECs to promote the progression of AS by sponging miR-455-5p via ESRRG/NLRP3. HIF1A-AS2 shuttled by ECs-derived EVs can accelerate the progression of AS by downregulating miR-455-5p and upregulating ESRRG and NLRP3.
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Affiliation(s)
- Pengcheng Li
- Department of Cardiology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, P. R. China
| | - Jin Hong
- Department of Cardiology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, P. R. China
| | - Cui Liang
- Department of Cardiology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, P. R. China
| | - Yapeng Li
- Department of Cardiology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, P. R. China
| | - Lu Gao
- Department of Cardiology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, P. R. China
| | - Leiming Wu
- Department of Cardiology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, P. R. China
| | - Rui Yao
- Department of Cardiology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, P. R. China
| | - Yanzhou Zhang
- Department of Cardiology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, P. R. China
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Ma L, Li C, Yin H, Huang J, Yu S, Zhao J, Tang Y, Yu M, Lin J, Ding L, Cui Q. The Mechanism of DNA Methylation and miRNA in Breast Cancer. Int J Mol Sci 2023; 24:ijms24119360. [PMID: 37298314 DOI: 10.3390/ijms24119360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 05/17/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
Breast cancer is the most prevalent cancer in the world. Currently, the main treatments for breast cancer are radiotherapy, chemotherapy, targeted therapy and surgery. The treatment measures for breast cancer depend on the molecular subtype. Thus, the exploration of the underlying molecular mechanisms and therapeutic targets for breast cancer remains a hotspot in research. In breast cancer, a high level of expression of DNMTs is highly correlated with poor prognosis, that is, the abnormal methylation of tumor suppressor genes usually promotes tumorigenesis and progression. MiRNAs, as non-coding RNAs, have been identified to play key roles in breast cancer. The aberrant methylation of miRNAs could lead to drug resistance during the aforementioned treatment. Therefore, the regulation of miRNA methylation might serve as a therapeutic target in breast cancer. In this paper, we reviewed studies on the regulatory mechanisms of miRNA and DNA methylation in breast cancer from the last decade, focusing on the promoter region of tumor suppressor miRNAs methylated by DNMTs and the highly expressed oncogenic miRNAs inhibited by DNMTs or activating TETs.
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Affiliation(s)
- Lingyuan Ma
- Lab of Biochemistry & Molecular Biology, School of Life Sciences, Yunnan University, Kunming 650091, China
- Yunnan Collaborative Innovation Center for Plateau Lake Ecology and Environmental Health, Kunming 650214, China
| | - Chenyu Li
- Lab of Biochemistry & Molecular Biology, School of Life Sciences, Yunnan University, Kunming 650091, China
- Yunnan Collaborative Innovation Center for Plateau Lake Ecology and Environmental Health, Kunming 650214, China
| | - Hanlin Yin
- Lab of Biochemistry & Molecular Biology, School of Life Sciences, Yunnan University, Kunming 650091, China
- Yunnan Collaborative Innovation Center for Plateau Lake Ecology and Environmental Health, Kunming 650214, China
| | - Jiashu Huang
- Lab of Biochemistry & Molecular Biology, School of Life Sciences, Yunnan University, Kunming 650091, China
- Yunnan Collaborative Innovation Center for Plateau Lake Ecology and Environmental Health, Kunming 650214, China
| | - Shenghao Yu
- Lab of Biochemistry & Molecular Biology, School of Life Sciences, Yunnan University, Kunming 650091, China
- Yunnan Collaborative Innovation Center for Plateau Lake Ecology and Environmental Health, Kunming 650214, China
| | - Jin Zhao
- Lab of Biochemistry & Molecular Biology, School of Life Sciences, Yunnan University, Kunming 650091, China
- Yunnan Collaborative Innovation Center for Plateau Lake Ecology and Environmental Health, Kunming 650214, China
| | - Yongxu Tang
- Lab of Biochemistry & Molecular Biology, School of Life Sciences, Yunnan University, Kunming 650091, China
- Yunnan Collaborative Innovation Center for Plateau Lake Ecology and Environmental Health, Kunming 650214, China
| | - Min Yu
- Lab of Biochemistry & Molecular Biology, School of Life Sciences, Yunnan University, Kunming 650091, China
- Yunnan Collaborative Innovation Center for Plateau Lake Ecology and Environmental Health, Kunming 650214, China
| | - Jie Lin
- Lab of Biochemistry & Molecular Biology, School of Life Sciences, Yunnan University, Kunming 650091, China
- Yunnan Collaborative Innovation Center for Plateau Lake Ecology and Environmental Health, Kunming 650214, China
| | - Lei Ding
- Lab of Biochemistry & Molecular Biology, School of Life Sciences, Yunnan University, Kunming 650091, China
- Yunnan Collaborative Innovation Center for Plateau Lake Ecology and Environmental Health, Kunming 650214, China
| | - Qinghua Cui
- Lab of Biochemistry & Molecular Biology, School of Life Sciences, Yunnan University, Kunming 650091, China
- Yunnan Collaborative Innovation Center for Plateau Lake Ecology and Environmental Health, Kunming 650214, China
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6
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Saviana M, Le P, Micalo L, Del Valle-Morales D, Romano G, Acunzo M, Li H, Nana-Sinkam P. Crosstalk between miRNAs and DNA Methylation in Cancer. Genes (Basel) 2023; 14:1075. [PMID: 37239435 PMCID: PMC10217889 DOI: 10.3390/genes14051075] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/04/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
miRNAs are some of the most well-characterized regulators of gene expression. Integral to several physiological processes, their aberrant expression often drives the pathogenesis of both benign and malignant diseases. Similarly, DNA methylation represents an epigenetic modification influencing transcription and playing a critical role in silencing numerous genes. The silencing of tumor suppressor genes through DNA methylation has been reported in many types of cancer and is associated with tumor development and progression. A growing body of literature has described the crosstalk between DNA methylation and miRNAs as an additional layer in the regulation of gene expression. Methylation in miRNA promoter regions inhibits its transcription, while miRNAs can target transcripts and subsequently regulate the proteins responsible for DNA methylation. Such relationships between miRNA and DNA methylation serve an important regulatory role in several tumor types and highlight a novel avenue for potential therapeutic targets. In this review, we discuss the crosstalk between DNA methylation and miRNA expression in the pathogenesis of cancer and describe how miRNAs influence DNA methylation and, conversely, how methylation impacts the expression of miRNAs. Finally, we address how these epigenetic modifications may be leveraged as biomarkers in cancer.
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Affiliation(s)
| | | | | | | | | | | | | | - Patrick Nana-Sinkam
- Department of Internal Medicine, Division of Pulmonary Diseases and Critical Care Medicine, Virginia Commonwealth University, 1250 E. Marshall Street, Richmond, VA 23298, USA
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7
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Tian Y, Chen Z, Wu P, Zhang D, Ma Y, Liu X, Wang X, Ding D, Cao X, Yu Y. MIR497HG-Derived miR-195 and miR-497 Mediate Tamoxifen Resistance via PI3K/AKT Signaling in Breast Cancer. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2204819. [PMID: 36815359 PMCID: PMC10131819 DOI: 10.1002/advs.202204819] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 12/14/2022] [Indexed: 05/28/2023]
Abstract
Tamoxifen is commonly used for the treatment of patients with estrogen receptor-positive (ER+) breast cancer, but the acquired resistance to tamoxifen presents a critical challenge of breast cancer therapeutics. Recently, long noncoding RNA MIR497HG and its embedded miR-497 and miR-195 are proved to play significant roles in many types of human cancers, but their roles in tamoxifen-resistant breast cancer remain unknown. The results indicate that MIR497HG deficiency induces breast cancer progression and tamoxifen resistance by inducing downregulation of miR-497/195. miR-497/195 coordinately represses five positive PI3K-AKT regulators (MAP2K1, AKT3, BCL2, RAF1, and CCND1), resulting in inhibition of PI3K-AKT signaling, and PI3K-AKT inhibition in tamoxifen-resistant cells restored tamoxifen responsiveness. Furthermore, ER α binds the MIR497HG promoter to activate its transcription in an estrogen-dependent manner. ZEB1 interacts with HDAC1/2 and DNMT3B at the MIR497HG promoter, resulting in promoter hypermethylation and histone deacetylation. The findings reveal that ZEB1-induced MIR497HG depletion contributes to breast cancer progression and tamoxifen resistance through PI3K-AKT signaling. MIR497HG can be used as a biomarker for predicting tamoxifen sensitivity in patients with ER+ breast cancer.
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Affiliation(s)
- Yao Tian
- The First Department of Breast CancerTianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Cancer Prevention and TherapyTianjin300060China
- Tianjin's Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Breast Cancer Prevention and TherapyTianjin Medical UniversityMinistry of EducationTianjin300060China
- Department of General SurgeryTianjin Medical University General HospitalTianjin300052China
| | - Zhao‐Hui Chen
- The First Department of Breast CancerTianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Cancer Prevention and TherapyTianjin300060China
- Tianjin's Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Breast Cancer Prevention and TherapyTianjin Medical UniversityMinistry of EducationTianjin300060China
| | - Peng Wu
- The First Department of Breast CancerTianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Cancer Prevention and TherapyTianjin300060China
- Tianjin's Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Breast Cancer Prevention and TherapyTianjin Medical UniversityMinistry of EducationTianjin300060China
| | - Di Zhang
- The First Department of Breast CancerTianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Cancer Prevention and TherapyTianjin300060China
- Tianjin's Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Breast Cancer Prevention and TherapyTianjin Medical UniversityMinistry of EducationTianjin300060China
| | - Yue Ma
- The First Department of Breast CancerTianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Cancer Prevention and TherapyTianjin300060China
- Tianjin's Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Breast Cancer Prevention and TherapyTianjin Medical UniversityMinistry of EducationTianjin300060China
| | - Xiao‐Feng Liu
- Key Laboratory of Cancer Prevention and TherapyTianjin300060China
- Tianjin's Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Breast Cancer Prevention and TherapyTianjin Medical UniversityMinistry of EducationTianjin300060China
| | - Xin Wang
- The First Department of Breast CancerTianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Cancer Prevention and TherapyTianjin300060China
- Tianjin's Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Breast Cancer Prevention and TherapyTianjin Medical UniversityMinistry of EducationTianjin300060China
| | - Dan Ding
- State Key Laboratory of Medicinal Chemical BiologyKey Laboratory of Bioactive MaterialsMinistry of Educationand College of Life SciencesNankai UniversityTianjin300071China
| | - Xu‐Chen Cao
- The First Department of Breast CancerTianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Cancer Prevention and TherapyTianjin300060China
- Tianjin's Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Breast Cancer Prevention and TherapyTianjin Medical UniversityMinistry of EducationTianjin300060China
| | - Yue Yu
- The First Department of Breast CancerTianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Cancer Prevention and TherapyTianjin300060China
- Tianjin's Clinical Research Center for CancerTianjin300060China
- Key Laboratory of Breast Cancer Prevention and TherapyTianjin Medical UniversityMinistry of EducationTianjin300060China
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8
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DNA methyltransferase 1 inhibits microRNA-497 and elevates GPRC5A expression to promote chemotherapy resistance and metastasis in breast cancer. Cancer Cell Int 2022; 22:112. [PMID: 35255904 PMCID: PMC8903738 DOI: 10.1186/s12935-022-02466-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 01/13/2022] [Indexed: 12/14/2022] Open
Abstract
Background Abnormal DNA methylation of tumor suppressor gene promoter has been found in breast cancer. Therefore, the current study set out to explore how DNA methyltransferase 1 (DNMT1) affects breast cancer through mediating miR-497/GPRC5A axis. Methods After loss and gain-of-function approaches were conducted in MCF-7/ADR and MCF-7 cells, cell viability, IC50 value, invasion, migration and apoptosis were measured, respectively. In addition, drug resistance, metastasis and apoptosis-related protein expression were examined using immunoblotting. ChIP and dual-luciferase reporter gene assays were carried out to validate relationship among DNMT1, miR-497, and GPRC5RA. Subcutaneous xenograft tumor model in nude mice was established to detect effects of DNMT1 on growth and metastasis of breast cancer in vivo. Results It was found that DNMT1 was notably increased, while miR-497 was poorly-expressed in breast cancer. Highly-expressed DNMT1 could promote chemotherapy resistance and metastasis of breast cancer. Meanwhile, DNMT1 modified methylation of CpG island in miR-497 promoter region, thereby repressing miR-497 level. In addition, miR-497 targeted GPRC5A expression to curb chemotherapy resistance and metastasis of breast cancer cells. Lastly, in vivo experiments showed that knockdown of DNMT1 could suppress breast cancer growth and metastasis. Conclusions Collectively, our findings indicated that DNMT1 may inhibit miR-497 and boost the expression of GPRC5A through methylation, thus augmenting breast cancer chemotherapy resistance and metastasis, which provides novel mechanistic insight into the unrecognized roles of DNMT1 in breast cancer. Supplementary Information The online version contains supplementary material available at 10.1186/s12935-022-02466-5.
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9
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Guo Y, Yuan X, Hong L, Wang Q, Liu S, Li Z, Huang L, Jiang S, Shi J. Promotor Hypomethylation Mediated Upregulation of miR-23b-3p Targets PTEN to Promote Bronchial Epithelial-Mesenchymal Transition in Chronic Asthma. Front Immunol 2022; 12:771216. [PMID: 35058921 PMCID: PMC8765721 DOI: 10.3389/fimmu.2021.771216] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 12/13/2021] [Indexed: 01/20/2023] Open
Abstract
Chronic asthma is characterized by airway inflammation and irreversible airway remodeling. Epithelial-mesenchymal transition (EMT) is a typical pathological change of airway remodeling. Our previous research demonstrated miR-23b inhibited airway smooth muscle proliferation while the function of miR-23b-3p has not been reported yet. Besides, miRNA is regulated by many factors, including DNA methylation. The function of miR-23b-3p and whether it is regulated by DNA methylation are worth exploring. Balb/c mice were given OVA sensitization to develop the asthmatic model. Expression of miR-23b-3p and EMT markers were measured by RT-qPCR, WB and immunohistochemistry (IHC). DNA methylation was detected by methylation-specific PCR (MSP) and the MassARRAY System. Asthmatic mice and TGF-β1-stimulated bronchial epithelial cells (BEAS-2B) showed EMT with increased miR-23b-3p. Overexpression of miR-23b-3p promoted EMT and migration, while inhibition of miR-23b-3p reversed these transitions. DNA methyltransferases were decreased in asthmatic mice. MSP and MassARRAY System detected the promotor of miR-23b showed DNA hypomethylation. DNA methyltransferase inhibitor 5’-AZA-CdZ increased the expression of miR-23b-3p. Meanwhile, PTEN was identified as a target gene of miR-23b-3p. Our results indicated that promotor hypomethylation mediated upregulation of miR-23b-3p targets PTEN to promote EMT in chronic asthma. miR-23b-3p and DNA methylation might be potential therapeutic targets for irreversible airway remodeling.
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Affiliation(s)
- Yimin Guo
- Department of Respiratory Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, China.,Department of Respiratory Medicine, Shaoxing People's Hospital (Shaoxing Hospital, Zhejiang University School of Medicine), Shaoxing, China
| | - Xiaoqing Yuan
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Breast Tumor Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Luna Hong
- Department of Respiratory Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, China
| | - Qiujie Wang
- Department of Respiratory Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, China
| | - Shanying Liu
- Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Research Center of Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Zhaolin Li
- Department of Respiratory Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, China
| | - Linjie Huang
- Department of Respiratory Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, China
| | - Shanping Jiang
- Department of Respiratory Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, China
| | - Jianting Shi
- Department of Respiratory Medicine, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, China.,Institute of Pulmonary Diseases, Sun Yat-sen University, Guangzhou, China
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10
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Chiang CC, Lin GL, Yang SY, Tu CW, Huang WL, Wei CF, Wang FC, Lin PJ, Huang WH, Chuang YM, Lee YT, Yeh CC, Chan M, Hsu YC. PCDHB15 as a potential tumor suppressor and epigenetic biomarker for breast cancer. Oncol Lett 2022; 23:117. [PMID: 35261631 PMCID: PMC8855166 DOI: 10.3892/ol.2022.13237] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 01/07/2022] [Indexed: 11/05/2022] Open
Abstract
Breast cancer is among the most frequently diagnosed cancer types and the leading cause of cancer-related death in women. The mortality rate of patients with breast cancer is currently increasing, perhaps due to a lack of early screening tools. In the present study, using The Cancer Genome Atlas (TCGA) breast cancer dataset (n=883), it was determined that methylation of the protocadherin β15 (PCDHB15) promoter was higher in breast cancer samples than that in normal tissues. A negative association between promoter methylation and expression of PCDHB15 was observed in the TCGA dataset and breast cancer cell lines. In TCGA cohort, lower PCDHB15 expression was associated with shorter relapse-free survival times. Treatment with the DNA methyltransferase inhibitor restored PCDHB15 expression in a breast cancer cell line; however, overexpression of PCDHB15 was shown to suppress colony formation. PCDHB15 methylation detected in circulating cell-free DNA (cfDNA) isolated from serum samples was higher in patients with breast cancer (40.8%) compared with that in patients with benign tumors (22.4%). PCDHB15 methylation was not correlated with any clinical parameters. Taken together, PCDHB15 is a potential tumor suppressor in cases of breast cancer, which can be epigenetically silenced via promoter methylation. PCDHB15 methylation using cfDNA is a novel minimally invasive epigenetic biomarker for the diagnosis and prognosis of breast cancer.
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Affiliation(s)
- Ching-Chung Chiang
- Department of Surgery, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi 60002, Taiwan, R.O.C
| | - Guan-Ling Lin
- Department of Biomedical Sciences, National Chung Cheng University, Chiayi 62101, Taiwan, R.O.C
| | - Shu-Yi Yang
- Department of Biomedical Sciences, National Chung Cheng University, Chiayi 62101, Taiwan, R.O.C
| | - Chi-Wen Tu
- Department of Surgery, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi 60002, Taiwan, R.O.C
| | - Wen-Long Huang
- Department of Chinese Medicine, Dalin Tzuchi Hospital, The Buddhist Tzuchi Medical Foundation, Chiayi 62247, Taiwan, R.O.C
| | - Chun-Feng Wei
- Department of Surgery, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi 60002, Taiwan, R.O.C
| | - Feng-Chi Wang
- Department of Biomedical Sciences, National Chung Cheng University, Chiayi 62101, Taiwan, R.O.C
| | - Pin-Ju Lin
- Department of Biomedical Sciences, National Chung Cheng University, Chiayi 62101, Taiwan, R.O.C
| | - Wan-Hong Huang
- Department of Biomedical Sciences, National Chung Cheng University, Chiayi 62101, Taiwan, R.O.C
| | - Yu-Ming Chuang
- Department of Biomedical Sciences, National Chung Cheng University, Chiayi 62101, Taiwan, R.O.C
| | - Yu-Ting Lee
- Department of Biomedical Sciences, National Chung Cheng University, Chiayi 62101, Taiwan, R.O.C
| | - Chia-Chou Yeh
- Department of Chinese Medicine, Dalin Tzuchi Hospital, The Buddhist Tzuchi Medical Foundation, Chiayi 62247, Taiwan, R.O.C
| | - Michael Chan
- Department of Biomedical Sciences, National Chung Cheng University, Chiayi 62101, Taiwan, R.O.C
| | - Yu-Chen Hsu
- Department of Surgery, Ditmanson Medical Foundation Chiayi Christian Hospital, Chiayi 60002, Taiwan, R.O.C
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11
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Peng Z, Zhang Y, Shi D, Jia Y, Shi H, Liu H. miR-497-5p/SALL4 axis promotes stemness phenotype of choriocarcinoma and forms a feedback loop with DNMT-mediated epigenetic regulation. Cell Death Dis 2021; 12:1046. [PMID: 34732693 PMCID: PMC8566582 DOI: 10.1038/s41419-021-04315-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Revised: 09/17/2021] [Accepted: 10/07/2021] [Indexed: 12/13/2022]
Abstract
Choriocarcinoma stem-like cells (CSLCs) might be at the origin of choriocarcinoma development associated with drug resistance or relapse. Spalt-like transcription factor 4 (SALL4), which is considered to be a stemness-related gene, can be regulated by miRNAs. In this study, SALL4 result is associated with progression-free survival of choriocarcinoma patients and CSLC's stemness characteristics. In addition, it could be downregulated by miR-497-5p by direct binding. miR-497-5p silencing by hypermethylation promoted malignant CSLC phenotype in vitro and in vivo. Furthermore, increased DNA methyltransferases (DNMTs) by SALL4 upregulation inhibited miR-497-5p expression via hypermethylation promotion. SALL4 appeared to be a key factor in promoting stemness phenotype of choriocarcinoma. Silencing miR-497-5p and SALL4 promotes choriocarcinoma progression and forms a feedback loop with DNMT-mediated epigenetic regulation, playing a crucial role in stemness maintenance in choriocarcinoma.
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Affiliation(s)
- Zheng Peng
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
| | - Yi Zhang
- Department of Gynecology and Obstetrics, Xiangya Hospital of Central South University, Changsha, 410008, China
| | - Dazun Shi
- Department of Gynecology and Obstetrics, Xiangya Hospital of Central South University, Changsha, 410008, China
| | - Yanyan Jia
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Huirong Shi
- Department of Gynecology and Obstetrics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Huining Liu
- Department of Gynecology and Obstetrics, Xiangya Hospital of Central South University, Changsha, 410008, China
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12
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Chen M, Chen J, Li C, Yu R, Chen W, Chen C. Improvement of cardiac function by mesenchymal stem cells derived extracellular vesicles through targeting miR-497/Smad7 axis. Aging (Albany NY) 2021; 13:22276-22285. [PMID: 34528899 PMCID: PMC8507268 DOI: 10.18632/aging.203533] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 08/17/2021] [Indexed: 12/20/2022]
Abstract
Background: The extracellular vesicles (EVs) secreted by bone marrow mesenchymal stromal cells (MSCs) have the ability to improve Myocardial infarction (MI). Some microRNAs (miRNAs) including miR-497 and related target genes have been proved to be closely linked with heart diseases. However, EVs could regulate MI process through miR-497, and the mechanisms have not been fully reported. Methods: Ligation of left anterior descending artery was performed to established MI animals model. Hypoxia cell model was established through lowering the level of oxygen. The cell invasion, migration, and proliferation were measured using tanswell, wound heating, and MTT assays. HE, Masson trichrome, and Sirius Red staining were used to investigate the morphological changes. Results: Overexpression of miR-497 reversed the promotion of cell migration, invasion, and proliferation caused by EVs. The improvement of cardiac function induced by EVs could also be reversed by overexpression of miR-497. Direct binding site between Smad7 and miR-497 was identified. Knockdown of Smad7 reversed the improvement of cardiac function induced by EVs. Conclusions: We found that EVs isolated from MSCs might improve the cardiac injury caused by MI through targeting miR497/Smad7. This study provides novel potential therapeutic thought for the prevention and treatment of MI through targeting miR-497/Smad7.
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Affiliation(s)
- Min Chen
- Department of Critical Care Medicine, Affiliated Hospital of Putian University, Putian 351100, Fujian, China
| | - Jianfei Chen
- Department of Critical Care Medicine, Affiliated Hospital of Putian University, Putian 351100, Fujian, China
| | - Caiting Li
- Department of Critical Care Medicine, Union Hospital of Fujian Medical University, Fuzhou 350001, Fujian, China
| | - Ranjie Yu
- Department of Critical Care Medicine, Union Hospital of Fujian Medical University, Fuzhou 350001, Fujian, China
| | - Weiwen Chen
- Department of Intensive Care Unit, Quan Zhou First Hospital Affiliated to Fujian Medical University, Quanzhou 362000, Fujian, China
| | - Cunrong Chen
- Department of Critical Care Medicine, Union Hospital of Fujian Medical University, Fuzhou 350001, Fujian, China
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13
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Gregorova J, Vychytilova-Faltejskova P, Sevcikova S. Epigenetic Regulation of MicroRNA Clusters and Families during Tumor Development. Cancers (Basel) 2021; 13:1333. [PMID: 33809566 PMCID: PMC8002357 DOI: 10.3390/cancers13061333] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/13/2021] [Accepted: 03/14/2021] [Indexed: 12/15/2022] Open
Abstract
MicroRNAs are small non-coding single-stranded RNA molecules regulating gene expression on a post-transcriptional level based on the seed sequence similarity. They are frequently clustered; thus, they are either simultaneously transcribed into a single polycistronic transcript or they may be transcribed independently. Importantly, microRNA families that contain the same seed region and thus target related signaling proteins, may be localized in one or more clusters, which are in a close relationship. MicroRNAs are involved in basic physiological processes, and their deregulation is associated with the origin of various pathologies, including solid tumors or hematologic malignancies. Recently, the interplay between the expression of microRNA clusters and families and epigenetic machinery was described, indicating aberrant DNA methylation or histone modifications as major mechanisms responsible for microRNA deregulation during cancerogenesis. In this review, the most studied microRNA clusters and families affected by hyper- or hypomethylation as well as by histone modifications are presented with the focus on particular mechanisms. Finally, the diagnostic and prognostic potential of microRNA clusters and families is discussed together with technologies currently used for epigenetic-based cancer therapies.
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Affiliation(s)
- Jana Gregorova
- Babak Myeloma Group, Department of Pathophysiology, Faculty of Medicine, Masaryk University, 625 00 Brno, Czech Republic;
| | - Petra Vychytilova-Faltejskova
- Department of Molecular Medicine, Central European Institute of Technology (CEITEC), Masaryk University, 625 00 Brno, Czech Republic;
| | - Sabina Sevcikova
- Babak Myeloma Group, Department of Pathophysiology, Faculty of Medicine, Masaryk University, 625 00 Brno, Czech Republic;
- Department of Clinical Hematology, University Hospital Brno, 625 00 Brno, Czech Republic
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