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Cheng X, Xu J, Gu H, Chen G, Wu L. ALDH1+ tumor stem cells promote the progression of malignant fibrous tissue sarcoma by inhibiting SYNPO2 through hsa-mir-206. Exp Cell Res 2024; 441:114167. [PMID: 39004202 DOI: 10.1016/j.yexcr.2024.114167] [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: 05/13/2024] [Revised: 07/11/2024] [Accepted: 07/11/2024] [Indexed: 07/16/2024]
Abstract
This research aims to explore the mechanism by which microRNAs may regulate the biological behavior of tumor cells in ALDH1+ fibrosarcoma. We identified differentially expressed miRNAs in ALDH + NMFH-1 cells, screened genes related to sarcoma metastasis in the TCGA database, and finally obtained key genes regulated by miRNAs that are involved in metastasis. The function and mechanism of these key genes were then validated at the cellular level. Using the ULCAN database, a significant correlation was found between hsa-mir-206 and mortality in sarcoma patients. WGCNA analysis identified 352 genes related to tumor metastasis. Through Venn diagrams, we obtained 15 metastasis-related genes regulated by hsa-mir-206. Survival analysis showed that SYNPO2 expression is significantly correlated with survival rate and is significantly underexpressed in multiple tumors. SYNPO2 showed a negative correlation with macrophages and a positive correlation with CD8+ T cells. After inhibiting the expression of hsa-mir-206 with siRNA plasmids, the mRNA expression of SYNPO2 was significantly upregulated. The results of CCK8 assay, scratch assay, and transwell assay showed that the proliferation and migration ability of NFMH-1 cells were promoted after SYNPO2 was inhibited. ALDH1+ tumor stem cells promote the proliferation and invasion of malignant fibrous histiocytoma cells by inhibiting SYNPO2 through hsa-mir-206.
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Affiliation(s)
- Xiangyang Cheng
- Department of Orthopedics, Minhang Hospital, Fudan University, 170 Xin Song Road, Shanghai, 201199, PR China
| | - Jun Xu
- Department of Orthopedics, Minhang Hospital, Fudan University, 170 Xin Song Road, Shanghai, 201199, PR China
| | - Huijie Gu
- Department of Orthopedics, Minhang Hospital, Fudan University, 170 Xin Song Road, Shanghai, 201199, PR China
| | - Guangnan Chen
- Department of Orthopedics, Minhang Hospital, Fudan University, 170 Xin Song Road, Shanghai, 201199, PR China
| | - Liang Wu
- Department of Orthopedics, Minhang Hospital, Fudan University, 170 Xin Song Road, Shanghai, 201199, PR China.
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Cao C, Wu X, Li Z, Xie Y, Xu S, Guo J, Sun W. EIF4A3-Bound hsa_circ_0006847 Exerts a Tumor-Suppressive Role in Gastric Cancer. DNA Cell Biol 2024; 43:232-244. [PMID: 38513058 DOI: 10.1089/dna.2023.0397] [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] [Indexed: 03/23/2024] Open
Abstract
Numerous studies have shown that circular RNAs are associated with the occurrence and development of various cancers, but the biological functions and mechanisms of hsa_circ_0006847 (circASPHD1) in gastric cancer (GC) remain unclear. The expression of hsa_circ_0006847 in GC cell lines, tissue, and plasma from GC patients was assayed by quantitative real-time reverse transcription-polymerase chain reaction. Hsa_circ_0006847 expression in cells was downregulated or upregulated by transfected small interfering RNA (siRNA) or overexpression plasmid. The role of hsa_circ_0006847 in GC was investigated with Cell Counting Kit-8, EdU, Transwell, flow cytometry assays, and in a subcutaneous xenograft tumor model. In addition, the interaction of eukaryotic translation initiation factor 4A3 (EIF4A3) and hsa_circ_0006847 was determined with western blot, biotin-labeled RNA pull-down, and RNA immunoprecipitation assays. Co-immunoprecipitation and mass spectrometry were used to validate the combination of EIF4A3 and synaptopodin-2 (SYNPO2). The expression of hsa_circ_0006847 was decreased in GC tissues and cells and indicated poor survival and prognosis. Overexpression of hsa_circ_0006847 inhibited cell proliferation, migration, and invasion. Flow cytometry showed that upregulation of hsa_circ_0006847 resulted in promotion of apoptosis of GC cells and inhibited their progression through the G0/G1 phase. Downregulation of hsa_circ_0006847 expression had the opposite effects. Overexpression of hsa_circ_0006847 in subcutaneous tumor xenografts inhibited tumor growth. Mechanically, hsa_circ_0006847 promoted the binding of EIF4A3 to SYNPO2 by recruiting EIF4A3, which inhibited the growth of GC. The tumor suppressor activity of hsa_circ_0006847, inhibition of the occurrence and development of GC, was mediated by promotion of EIF4A3 and the binding of EIF4A3 to SYNPO2. The results support the study of hsa_circ_0006847 as a novel therapeutic target for the treatment of GC.
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Affiliation(s)
- Chunli Cao
- Department of Gastrointestinal Surgery, The Affiliated People's Hospital of Ningbo University, Ningbo, China
- Zhejiang Key Laboratory of Pathophysiology, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Health Science Center, Ningbo University, Ningbo, China
| | - Xinxin Wu
- Zhejiang Key Laboratory of Pathophysiology, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Health Science Center, Ningbo University, Ningbo, China
| | - Zhe Li
- Department of Gastroenterology, The First Affiliated Hospital of Ningbo University, Ningbo, China
| | - Yaoyao Xie
- Zhejiang Key Laboratory of Pathophysiology, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Health Science Center, Ningbo University, Ningbo, China
| | - Shiyi Xu
- Department of Gastrointestinal Surgery, The Affiliated People's Hospital of Ningbo University, Ningbo, China
- Zhejiang Key Laboratory of Pathophysiology, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Health Science Center, Ningbo University, Ningbo, China
| | - Junming Guo
- Zhejiang Key Laboratory of Pathophysiology, Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Health Science Center, Ningbo University, Ningbo, China
- Department of Gastroenterology, The First Affiliated Hospital of Ningbo University, Ningbo, China
- Institute of Digestive Diseases of Ningbo University, Ningbo, China
| | - Weiliang Sun
- Department of Gastrointestinal Surgery, The Affiliated People's Hospital of Ningbo University, Ningbo, China
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Ye G, Tu L, Li Z, Li X, Zheng X, Song Y. SYNPO2 promotes the development of BLCA by upregulating the infiltration of resting mast cells and increasing the resistance to immunotherapy. Oncol Rep 2024; 51:14. [PMID: 38038167 PMCID: PMC10758676 DOI: 10.3892/or.2023.8673] [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: 05/11/2023] [Accepted: 09/27/2023] [Indexed: 12/02/2023] Open
Abstract
Synaptopodin 2 (SYNPO2) plays a pivotal role in regulating tumor growth, development and progression in bladder urothelial Carcinoma (BLCA). However, the precise biological functions and mechanisms of SYNPO2 in BLCA remain unclear. Based on TCGA database‑derived BLCA RNA sequencing data, survival analysis and prognosis analysis indicate that elevated SYNPO2 expression was associated with poor survival outcomes. Notably, exogenous SYNPO2 expression significantly promoted tumor invasion and migration by upregulating vimentin expression in BLCA cell lines. Enrichment analysis revealed the involvement of SYNPO2 in humoral immune responses and the PI3K/AKT signaling pathway. Moreover, increased SYNPO2 levels increased the sensitivity of BLCA to PI3K/AKT pathway‑targeted drugs while being resistant to conventional chemotherapy. In in vivo BLCA mouse models, SYNPO2 overexpression increased pulmonary metastasis of 5637 cells. High SYNPO2 expression led to increased infiltration of innate immune cells, particularly mast cells, in both nude mouse model and clinical BLCA samples. Furthermore, tumor immune dysfunction and exclusion score showed that patients with BLCA patients and high SYNPO2 expression exhibited worse clinical outcomes when treated with immune checkpoint inhibitors. Notably, in the IMvigor 210 cohort, SYNPO2 expression was significantly associated with the population of resting mast cells in BLCA tissue following PD1/PDL1 targeted therapy. In conclusion, SYNPO2 may be a promising prognostic factor in BLCA by modulating mast cell infiltration and exacerbating resistance to immune therapy and conventional chemotherapy.
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Affiliation(s)
- Gongjie Ye
- Department of Critical Care Medicine, Ningbo University, Ningbo, Zhejiang 315040, P.R. China
- Ningbo Institute of Innovation for Combined Medicine and Engineering, Ningbo Medical Centre Lihuili Hospital, Ningbo University, Ningbo, Zhejiang 315040, P.R. China
| | - Linglan Tu
- School of Laboratory Medicine and Bioengineering, Hangzhou Medical College, Hangzhou, Zhejiang 310012, P.R. China
| | - Zhuduo Li
- School of Laboratory Medicine and Bioengineering, Hangzhou Medical College, Hangzhou, Zhejiang 310012, P.R. China
| | - Xiangyu Li
- School of Laboratory Medicine and Bioengineering, Hangzhou Medical College, Hangzhou, Zhejiang 310012, P.R. China
| | - Xiaoliang Zheng
- School of Laboratory Medicine and Bioengineering, Hangzhou Medical College, Hangzhou, Zhejiang 310012, P.R. China
| | - Yongfei Song
- Ningbo Institute of Innovation for Combined Medicine and Engineering, Ningbo Medical Centre Lihuili Hospital, Ningbo University, Ningbo, Zhejiang 315040, P.R. China
- School of Laboratory Medicine and Bioengineering, Hangzhou Medical College, Hangzhou, Zhejiang 310012, P.R. China
- Medical College, Ningbo University, Ningbo, Zhejiang 315211, P.R. China
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Lohanadan K, Assent M, Linnemann A, Schuld J, Heukamp LC, Krause K, Vorgerd M, Reimann J, Schänzer A, Kirfel G, Fürst DO, Van der Ven PFM. Synaptopodin-2 Isoforms Have Specific Binding Partners and Display Distinct, Muscle Cell Type-Specific Expression Patterns. Cells 2023; 13:85. [PMID: 38201288 PMCID: PMC10778272 DOI: 10.3390/cells13010085] [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: 11/20/2023] [Revised: 12/18/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
Synaptopodin-2 (SYNPO2) is a protein associated with the Z-disc in striated muscle cells. It interacts with α-actinin and filamin C, playing a role in Z-disc maintenance under stress by chaperone-assisted selective autophagy (CASA). In smooth muscle cells, SYNPO2 is a component of dense bodies. Furthermore, it has been proposed to play a role in tumor cell proliferation and metastasis in many different kinds of cancers. Alternative transcription start sites and alternative splicing predict the expression of six putative SYNPO2 isoforms differing by extended amino- and/or carboxy-termini. Our analyses at mRNA and protein levels revealed differential expression of SYNPO2 isoforms in cardiac, skeletal and smooth muscle cells. We identified synemin, an intermediate filament protein, as a novel binding partner of the PDZ-domain in the amino-terminal extension of the isoforms mainly expressed in cardiac and smooth muscle cells, and demonstrated colocalization of SYNPO2 and synemin in both cell types. A carboxy-terminal extension, mainly expressed in smooth muscle cells, is sufficient for association with dense bodies and interacts with α-actinin. SYNPO2 therefore represents an additional and novel link between intermediate filaments and the Z-discs in cardiomyocytes and dense bodies in smooth muscle cells, respectively. In pathological skeletal muscle samples, we identified SYNPO2 in the central and intermediate zones of target fibers of patients with neurogenic muscular atrophy, and in nemaline bodies. Our findings help to understand distinct functions of individual SYNPO2 isoforms in different muscle tissues, but also in tumor pathology.
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Affiliation(s)
| | - Marvin Assent
- Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Anja Linnemann
- Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Julia Schuld
- Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Lukas C. Heukamp
- Department of Pathology, University Hospital Bonn, 53127 Bonn, Germany
| | - Karsten Krause
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Matthias Vorgerd
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Jens Reimann
- Department of Neurology, Neuromuscular Diseases Section, University Hospital Bonn, 53127 Bonn, Germany
| | - Anne Schänzer
- Institute of Neuropathology, Justus-Liebig-University Giessen, 35392 Giessen, Germany
| | - Gregor Kirfel
- Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Dieter O. Fürst
- Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
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