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Zhou S, Sheng L, Zhang L, Zhang J, Wang L. METTL3/IGF2BP3-regulated m6A modification of HYOU1 confers doxorubicin resistance in breast cancer. Biochim Biophys Acta Gen Subj 2024; 1868:130542. [PMID: 38103759 DOI: 10.1016/j.bbagen.2023.130542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 11/18/2023] [Accepted: 12/10/2023] [Indexed: 12/19/2023]
Abstract
Chemoresistance is a main reason for therapeutic failure and poor prognosis for breast cancer (BC) patients, especially for triple-negative BC patients. How the molecular mechanisms underlying the chemoresistance to doxorubicin (Dox) in BC is not well understood. Here, we revealed that METTL3/IGF2BP3-regulated m6A modification of HYOU1 increased Dox resistance in BC cells. CCK-8 and Annexin V-FITC/PI staining assays were employed to measure viability and cell death. Western blotting and qRT-PCR assays were applied to assay the expression of genes. Knockdown and rescue experiments were used to assay the role of METTL3, IGF2BP3 and HYOU1 in regulating BC cell responses to Dox. RIP, MeRIP and dual-luciferase activity assays were applied to examine the function of METTL3/IGF2BP3 in the m6A modification of HYOU1 mRNA. It was found that global mRNA m6A methylation levels were upregulated in Dox-resistant BC cell lines. The methyltransferase METTL3 was upregulated in Dox-resistant BC cell lines, and downregulation of METTL3 could overcome this resistance. Furthermore, HYOU1 was identified as a downstream target of METTL3-mediated m6A modification. Downregulation of HYOU1 could overcome Dox resistance, while forced expression of HYOU1 resulted in Dox resistance in BC cells. METTL3 cooperated with IGF2BP3 to modulate the m6A modification of HYOU1 mRNA and increase its stability. Collectively, our findings unveiled the key roles of the METTL3/IGF2BP3/HYOU1 axis in modulating Dox sensitivity in BC cells; thus, targeting this axis might be a potential strategy to increase Dox efficacy in the treatment of BC.
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Affiliation(s)
- Shaocheng Zhou
- Department of Thyroid and Breast Surgery, Ningbo Medical Center Lihuili Hospital, Ningbo, Zhejiang, China
| | - Lijuan Sheng
- Gulou Street Community Health Service Center, Haishu District, Ningbo, Zhejiang, China
| | - Lin Zhang
- Department of Clinical Laboratory, Ningbo Medical Center Lihuili Hospital, Ningbo, Zhejiang, China
| | - Jianan Zhang
- Department of Thyroid and Breast Surgery, Ningbo Medical Center Lihuili Hospital, Ningbo, Zhejiang, China
| | - Lei Wang
- Department of Thyroid and Breast Surgery, Ningbo Medical Center Lihuili Hospital, Ningbo, Zhejiang, China.
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Li D, Wang L, Jiang B, Jing Y, Li X. Improving cancer immunotherapy by preventing cancer stem cell and immune cell linking in the tumor microenvironment. Biomed Pharmacother 2024; 170:116043. [PMID: 38128186 DOI: 10.1016/j.biopha.2023.116043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/07/2023] [Accepted: 12/14/2023] [Indexed: 12/23/2023] Open
Abstract
Cancer stem cells are the key link between malignant tumor progression and drug resistance. This cell population has special properties that are different from those of conventional tumor cells, and the role of cancer stem cell-related exosomes in progression of tumor malignancy is becoming increasingly clear. Cancer stem cell-derived exosomes carry a variety of functional molecules involved in regulation of the microenvironment, especially with regard to immune cells, but how these exosomes exert their functions and the specific mechanisms need to be further clarified. Here, we summarize the role of cancer stem cell exosomes in regulating immune cells in detail, aiming to provide new insights for subsequent targeted drug development and clinical strategy formulation.
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Affiliation(s)
- Dongyu Li
- Department of General Surgery & VIP In-Patient Ward, the First Hospital of China Medical University, Liaoning Province 110001, China
| | - Lei Wang
- Department of Vascular and Thyroid Surgery, the First Hospital of China Medical University, Liaoning Province 110001, China
| | - Bo Jiang
- Department of Vascular and Thyroid Surgery, the First Hospital of China Medical University, Liaoning Province 110001, China
| | - Yuchen Jing
- Department of Vascular and Thyroid Surgery, the First Hospital of China Medical University, Liaoning Province 110001, China
| | - Xuan Li
- Department of Vascular and Thyroid Surgery, the First Hospital of China Medical University, Liaoning Province 110001, China.
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Xu D, Han S, Yue X, Xu X, Huang T. METTL14 Suppresses Tumor Stemness and Metastasis of Colon Cancer Cells by Modulating m6A-Modified SCD1. Mol Biotechnol 2023:10.1007/s12033-023-00843-7. [PMID: 37592151 DOI: 10.1007/s12033-023-00843-7] [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: 02/16/2023] [Accepted: 07/27/2023] [Indexed: 08/19/2023]
Abstract
Colon cancer (CC) is a malignant disease of the digestive tract, and its rising prevalence poses a grave threat to people's health. N6-methyladenosine (m6A) modification is essential for various crucial life processes through modulating gene expression. Methyltransferase-like 14 (METTL14), the m6A methylation transferase core protein, and its aberrant expression is intimately correlated to tumor development. This study was conducted to probe the impacts and specific mechanisms of METTL14 on the biological process of CC. Bioinformatics data disclosed that METTL14 was significantly attenuated in CC. Functional assays were executed to ascertain how METTL14 affected CC tumorigenicity, and METTL14 overexpression caused a notable decline in viability, migration, invasion, and stemness phenotype of CC cells. Then, in-depth mechanistic studies displayed that stearoyl-CoA desaturase 1 (SCD1) was a downstream target gene of METTL14-mediated m6A modification. METTL14 overexpression substantially augmented the m6A modification of SCD1 mRNA and diminished the SCD1 mRNA level. In addition, we revealed that YTHDF2 was the m6A reader to recognize METTL14 m6A-modified SCD1 mRNA and abolish its stability. Finally, we also validated that METTL14 might impede the tumorigenic process of CC through SCD1 mediated Wnt/β-catenin signaling. Taken together, this study presented that METTL14 performed as a potential therapeutic target in CC with important implications for the prognosis amelioration of CC patients.
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Affiliation(s)
- Dehua Xu
- Gastrointestinal Surgery, Suzhou Xiangcheng Peoples' Hospital, No. 1060, Huayuan Road, Xiangcheng District, Suzhou, 215131, Jiangsu, China
| | - Shuguang Han
- Gastrointestinal Surgery, Suzhou Xiangcheng Peoples' Hospital, No. 1060, Huayuan Road, Xiangcheng District, Suzhou, 215131, Jiangsu, China
| | - Xiaoguang Yue
- Gastrointestinal Surgery, Suzhou Xiangcheng Peoples' Hospital, No. 1060, Huayuan Road, Xiangcheng District, Suzhou, 215131, Jiangsu, China
| | - Xiangyu Xu
- Gastrointestinal Surgery, Suzhou Xiangcheng Peoples' Hospital, No. 1060, Huayuan Road, Xiangcheng District, Suzhou, 215131, Jiangsu, China
| | - Tieao Huang
- Gastrointestinal Surgery, Suzhou Xiangcheng Peoples' Hospital, No. 1060, Huayuan Road, Xiangcheng District, Suzhou, 215131, Jiangsu, China.
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