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Zhao R, Liang Z, Chu J, Zheng Q, Zhao J, Tang S, Chen Q, Huang Y, Zhou X, Pan X. Downregulation of NEBL promotes migration and invasion of clear cell renal cell carcinoma by inducing epithelial-mesenchymal transition. Pathol Res Pract 2024; 254:155068. [PMID: 38215565 DOI: 10.1016/j.prp.2023.155068] [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: 05/27/2023] [Revised: 10/04/2023] [Accepted: 12/27/2023] [Indexed: 01/14/2024]
Abstract
As a member of the nebulin protein family and a structural protein of cytoskeleton, NEBL plays an important role in cardiac diseases. Recently, literature have reported the involvement of NEBL in the occurrence and development of various cancers except clear cell renal cell carcinoma (ccRCC). In this study, we found that mRNA and protein of NEBL are downregulated remarkably in ccRCC tissues based on both the TCGA database and clinical samples we collected. The areas under curve values of NEBL analyzed based on the TCGA database, qRT-PCR and IHC results were 0.9376, 0.9733 and 0.9807, respectively. The lower mRNA level of NEBL was associated with worse outcomes in ccRCC patients. When overexpressing NEBL in ccRCC cell lines, the proliferation, migration and invasion of ccRCC cells were suppressed significantly, suggesting a tumor suppressor role of NEBL. In addition, we identified that NEBL is closely related to epithelial-mesenchymal transition (EMT), thereby reducing the motility of ccRCC cells. Furthermore, the lower expression of NEBL was correlated with ccRCC patients with distant organ metastasis. In summary, we firstly described the aberrant expression of NEBL and revealed its tumor suppressor role in ccRCC. Our data support that NEBL could serve as a valuable diagnostic and prognostic biomarker in ccRCC, as well as a promising therapeutic target.
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Affiliation(s)
- Ran Zhao
- Life Science Institute, Guangxi Medical University, China; Key Laboratory of High-Incidence-Tumor Prevention & Treatment (Guangxi Medical University), Ministry of Education, Nanning, China
| | - Ziyuan Liang
- Life Science Institute, Guangxi Medical University, China; Key Laboratory of High-Incidence-Tumor Prevention & Treatment (Guangxi Medical University), Ministry of Education, Nanning, China
| | - Jiemei Chu
- Life Science Institute, Guangxi Medical University, China
| | - Qian Zheng
- Life Science Institute, Guangxi Medical University, China; Key Laboratory of High-Incidence-Tumor Prevention & Treatment (Guangxi Medical University), Ministry of Education, Nanning, China
| | - Jun Zhao
- Key Laboratory of High-Incidence-Tumor Prevention & Treatment (Guangxi Medical University), Ministry of Education, Nanning, China
| | - Shiyue Tang
- Key Laboratory of High-Incidence-Tumor Prevention & Treatment (Guangxi Medical University), Ministry of Education, Nanning, China
| | - Qiaoli Chen
- Key Laboratory of High-Incidence-Tumor Prevention & Treatment (Guangxi Medical University), Ministry of Education, Nanning, China
| | - Yiying Huang
- Key Laboratory of High-Incidence-Tumor Prevention & Treatment (Guangxi Medical University), Ministry of Education, Nanning, China
| | - Xiaoying Zhou
- Life Science Institute, Guangxi Medical University, China.
| | - Xinli Pan
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Guangxi Academy of Sciences, China.
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Song SE, Kim Y, Jeong H, Lee B, Lee J, Roh JS, So MW, Lee SG, Sohn DH. FAT10 differentially stabilizes MYPT2 isoforms. Biochem Biophys Res Commun 2023; 676:115-120. [PMID: 37506472 DOI: 10.1016/j.bbrc.2023.07.025] [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: 07/01/2023] [Revised: 07/11/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023]
Abstract
Myosin phosphatase (MP) is an enzyme complex that regulates muscle contraction and plays important roles in various physiological and pathological conditions. Myosin phosphatase targeting subunit (MYPT) 2, a subunit of MP, interacts with protein phosphatase 1c to regulate its phosphatase activity. MYPT2 exists in various isoforms that differ in the composition of essential motifs that contribute to its function. However, regulatory mechanisms underlying these isoforms are poorly understood. Human leukocyte antigen-F adjacent transcript 10 (FAT10) is a ubiquitin-like modifier that not only targets proteins for proteasomal degradation but also stabilizes its interacting proteins. In this study, we investigated the effect of the interaction between FAT10 and MYPT2 isoform a (the canonical full-length form of MYPT2) or MYPT2 isoform f (the natural truncated form of MYPT2). FAT10 interacted with both MYPT2 isoforms a and f; however, only MYPT2 isoform f was increased by FAT10, whereas MYPT2 isoform a remained unaffected by FAT10. We further confirmed that, in contrast to MYPT2 isoform a, MYPT2 isoform f undergoes rapid degradation via the ubiquitin-proteasome pathway and that FAT10 stabilizes MYPT2 isoform f by inhibiting its ubiquitination. Therefore, our findings suggest that the interaction between FAT10 and MYPT2 isoforms leads to distinct stabilization effects on each isoform, potentially modulating MP activity.
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Affiliation(s)
- Seong Eun Song
- Department of Microbiology and Immunology, Pusan National University School of Medicine, Yangsan, Republic of Korea
| | - Yerin Kim
- Department of Microbiology and Immunology, Pusan National University School of Medicine, Yangsan, Republic of Korea
| | - Hoim Jeong
- Department of Microbiology and Immunology, Pusan National University School of Medicine, Yangsan, Republic of Korea
| | - Beomgu Lee
- Department of Microbiology and Immunology, Pusan National University School of Medicine, Yangsan, Republic of Korea
| | - Jihyeon Lee
- Department of Microbiology and Immunology, Pusan National University School of Medicine, Yangsan, Republic of Korea
| | - Jong Seong Roh
- Department of Herbal Prescription, College of Korean Medicine, Daegu Haany University, Gyeongsan, Republic of Korea
| | - Min Wook So
- Division of Rheumatology, Department of Internal Medicine, Pusan National University School of Medicine, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
| | - Seung-Geun Lee
- Biomedical Research Institute, Pusan National University Hospital, Busan, Republic of Korea; Division of Rheumatology, Department of Internal Medicine, Pusan National University School of Medicine, Pusan National University Hospital, Busan, Republic of Korea
| | - Dong Hyun Sohn
- Department of Microbiology and Immunology, Pusan National University School of Medicine, Yangsan, Republic of Korea.
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Ling X, Wang R, Lin L, Wu Y, Cheng W. N6-methyladenosine-modified microRNA-675 advances the development of gastrointestinal stromal tumors via inhibiting myosin phosphatase targeting protein 1. Genomics 2023; 115:110704. [PMID: 37678441 DOI: 10.1016/j.ygeno.2023.110704] [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: 06/16/2023] [Revised: 08/16/2023] [Accepted: 09/04/2023] [Indexed: 09/09/2023]
Abstract
RNA N6-methyladenosine (m6A) modifications influence gastrointestinal stromal tumors (GISTs) development, but the detailed molecular mechanisms have not been fully studied. Here, microRNA-675 was found to be aberrantly elevated in cancerous tissues and cells of GISTs, compared to the corresponding normal counterparts, and GISTs patients with high-expressed microRNA-675 have worse outcomes. Additional experiments confirmed that silencing of microRNA-675 hindered cell division, mobility and tumorigenesis in vitro and in vivo, whereas triggered apoptotic cell death in GISTs cells. Furthermore, microRNA-675-ablation increased the expression levels of myosin phosphatase targeting protein 1 (MYPT1) to inactivate the tumor-initiating RhoA/NF2/YAP1 signal pathway, and downregulation of MYPT1 recovered the malignant phenotypes in microRNA-675-silenced GISTs cells. In addition, we evidenced that METTL3-mediated m6A modifications were essential for sustaining the stability of microRNA-675, and silencing of METTL3 restrained tumorigenesis of GISTs cells by regulating the microRNA-675/MYPT1 axis. To summarize, theMETTL3/m6A/microRNA-675/MYPT1 axis could be used as novel biomarkers for the diagnosis and treatment of GISTs.
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Affiliation(s)
- Xiaohua Ling
- Department of Gastroenterology, the Fourth Affiliated Hospital of Harbin Medical University, Yiyuan Street No. 37, Nangang District, Harbin 150001, Heilongjiang, China.
| | - Ruifeng Wang
- Department of Gastroenterology, Beijing Tsinghua Changgung Hospital, Litang Road No. 168, Changping District, Beijing 102200, China
| | - Luoqiang Lin
- Department of General Surgery, the Fourth Affiliated Hospital of Harbin Medical University, Yiyuan Street No. 37, Nangang District, Harbin 150001, Heilongjiang, China
| | - Yuxuan Wu
- Department of Gastroenterology, the Fourth Affiliated Hospital of Harbin Medical University, Yiyuan Street No. 37, Nangang District, Harbin 150001, Heilongjiang, China
| | - Weipeng Cheng
- Department of Gastroenterology, the Fourth Affiliated Hospital of Harbin Medical University, Yiyuan Street No. 37, Nangang District, Harbin 150001, Heilongjiang, China
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