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Anim MT, Tuffour I, Willis R, Schell M, Ostlund T, Mahnashi MH, Halaweish F, Willand-Charnley R. Deacetylated Sialic Acid Sensitizes Lung and Colon Cancers to Novel Cucurbitacin-Inspired Estrone Epidermal Growth Factor Receptor (EGFR) Inhibitor Analogs. Molecules 2023; 28:6257. [PMID: 37687086 PMCID: PMC10488366 DOI: 10.3390/molecules28176257] [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: 07/27/2023] [Revised: 08/14/2023] [Accepted: 08/19/2023] [Indexed: 09/10/2023] Open
Abstract
Cancers utilize sugar residues such as sialic acids (Sia) to improve their ability to survive. Sia presents a variety of functional group alterations, including O-acetylation on the C6 hydroxylated tail. Previously, sialylation has been reported to suppress EGFR activation and increase cancer cell sensitivity to Tyrosine Kinase Inhibitors (TKIs). In this study, we report on the effect of deacetylated Sia on the activity of three novel EGFR-targeting Cucurbitacin-inspired estrone analogs (CIEAs), MMA 294, MMA 321, and MMA 320, in lung and colon cancer cells. Acetylation was modulated by the removal of Sialate O-Acetyltransferase, also known as CAS1 Domain-containing protein (CASD1) gene via CRISPR-Cas9 gene editing. Using a variety of cell-based approaches including MTT cell viability assay, flow cytometry, immunofluorescence assay and in-cell ELISA we observed that deacetylated Sia-expressing knockout cells (1.24-6.49 μM) were highly sensitive to all CIEAs compared with the control cells (8.82-20.97 μM). Apoptosis and varied stage cell cycle arrest (G0/G1 and G2/M) were elucidated as mechanistic modes of action of the CIEAs. Further studies implicated overexpression of CIEAs' cognate protein target, phosphorylated EGFR, in the chemosensitivity of the deacetylated Sia-expressing knockout cells. This observation correlated with significantly decreased levels of key downstream proteins (phosphorylated ERK and mTOR) of the EGFR pathway in knockout cells compared with controls when treated with CIEAs. Collectively, our findings indicate that Sia deacetylation renders lung and colon cancer cells susceptible to EGFR therapeutics and provide insights for future therapeutic interventions.
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Affiliation(s)
- Mathias T. Anim
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD 57007, USA; (M.T.A.); (I.T.); (R.W.); (M.S.); (T.O.); (F.H.)
| | - Isaac Tuffour
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD 57007, USA; (M.T.A.); (I.T.); (R.W.); (M.S.); (T.O.); (F.H.)
| | - Rylan Willis
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD 57007, USA; (M.T.A.); (I.T.); (R.W.); (M.S.); (T.O.); (F.H.)
| | - Matthew Schell
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD 57007, USA; (M.T.A.); (I.T.); (R.W.); (M.S.); (T.O.); (F.H.)
| | - Trevor Ostlund
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD 57007, USA; (M.T.A.); (I.T.); (R.W.); (M.S.); (T.O.); (F.H.)
| | - Mater H. Mahnashi
- Department of Pharmaceutical Chemistry, Najran University, Najran P.O. Box 1988, Saudi Arabia;
| | - Fathi Halaweish
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD 57007, USA; (M.T.A.); (I.T.); (R.W.); (M.S.); (T.O.); (F.H.)
| | - Rachel Willand-Charnley
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD 57007, USA; (M.T.A.); (I.T.); (R.W.); (M.S.); (T.O.); (F.H.)
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Zhang W, Wang H, Wang H, Xu C, Zhao R, Yao J, Zhai C, Han W, Pan H, Sheng J. Integrated Analysis Identifies DPP7 as a Prognostic Biomarker in Colorectal Cancer. Cancers (Basel) 2023; 15:3954. [PMID: 37568770 PMCID: PMC10416901 DOI: 10.3390/cancers15153954] [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: 07/05/2023] [Revised: 07/30/2023] [Accepted: 08/02/2023] [Indexed: 08/13/2023] Open
Abstract
Colorectal cancer has a poor prognosis and is prone to recurrence and metastasis. DPP7, a prolyl peptidase, is reported to regulate lymphocyte quiescence. However, the correlation of DPP7 with prognosis in CRC remains unclear. With publicly available cohorts, the Wilcoxon rank-sum test and logistic regression were employed to analyze the relationship between DPP7 expression and the clinicopathological features of CRC patients. Specific pathways of differentially expressed genes were determined through biofunctional analysis and gene set enrichment analysis (GSEA). qPCR and immunohistochemical staining were used to determine DPP7 expression levels in surgical specimens. The public dataset and analysis of the biospecimens of CRC patients revealed that DPP7, in the CRC samples, was expressed significantly higher than in non-tumor tissues. Moreover, increased DPP7 was significantly associated with a higher N stage, lymphatic invasion, and shorter overall survival. Functionally, DPP7 is involved in neuroactive ligand-receptor interaction and olfactory transduction signaling. We identified a series of targeted drugs and small-molecule drugs with responses to DPP7. To conclude, DPP7 is a valuable diagnostic and prognostic biomarker for CRC and considered as a new therapeutic target.
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Affiliation(s)
- Wei Zhang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China; (W.Z.); (H.W.); (H.W.); (R.Z.); (J.Y.); (C.Z.); (W.H.); (H.P.)
| | - Haidong Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China; (W.Z.); (H.W.); (H.W.); (R.Z.); (J.Y.); (C.Z.); (W.H.); (H.P.)
| | - Huadi Wang
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China; (W.Z.); (H.W.); (H.W.); (R.Z.); (J.Y.); (C.Z.); (W.H.); (H.P.)
| | - Chuchu Xu
- Department of Gastrointestinal Surgery, Shaoxing People’s Hospital (Shaoxing Hospital, Zhejiang University School of Medicine), Shaoxing 312000, China;
| | - Rongjie Zhao
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China; (W.Z.); (H.W.); (H.W.); (R.Z.); (J.Y.); (C.Z.); (W.H.); (H.P.)
| | - Junlin Yao
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China; (W.Z.); (H.W.); (H.W.); (R.Z.); (J.Y.); (C.Z.); (W.H.); (H.P.)
| | - Chongya Zhai
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China; (W.Z.); (H.W.); (H.W.); (R.Z.); (J.Y.); (C.Z.); (W.H.); (H.P.)
| | - Weidong Han
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China; (W.Z.); (H.W.); (H.W.); (R.Z.); (J.Y.); (C.Z.); (W.H.); (H.P.)
| | - Hongming Pan
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China; (W.Z.); (H.W.); (H.W.); (R.Z.); (J.Y.); (C.Z.); (W.H.); (H.P.)
| | - Jin Sheng
- Department of Medical Oncology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310016, China; (W.Z.); (H.W.); (H.W.); (R.Z.); (J.Y.); (C.Z.); (W.H.); (H.P.)
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Tuffour I, Amuzu S, Bayoumi H, Surtaj I, Parrish C, Willand-Charnley R. Early in vitro evidence indicates that deacetylated sialic acids modulate multi-drug resistance in colon and lung cancers via breast cancer resistance protein. Front Oncol 2023; 13:1145333. [PMID: 37377914 PMCID: PMC10291187 DOI: 10.3389/fonc.2023.1145333] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/30/2023] [Indexed: 06/29/2023] Open
Abstract
Cancers utilize sugar residues to engage in multidrug resistance. The underlying mechanism of action involving glycans, specifically the glycan sialic acid (Sia) and its various functional group alterations, has not been explored. ATP-binding cassette (ABC) transporter proteins, key proteins utilized by cancers to engage in multidrug resistant (MDR) pathways, contain Sias in their extracellular domains. The core structure of Sia can contain a variety of functional groups, including O-acetylation on the C6 tail. Modulating the expression of acetylated-Sias on Breast Cancer Resistance Protein (BCRP), a significant ABC transporter implicated in MDR, in lung and colon cancer cells directly impacted the ability of cancer cells to either retain or efflux chemotherapeutics. Via CRISPR-Cas-9 gene editing, acetylation was modulated by the removal of CAS1 Domain-containing protein (CASD1) and Sialate O-Acetyl esterase (SIAE) genes. Using western blot, immunofluorescence, gene expression, and drug sensitivity analysis, we confirmed that deacetylated Sias regulated a MDR pathway in colon and lung cancer in early in vitro models. When deacetylated Sias were expressed on BCRP, colon and lung cancer cells were able to export high levels of BCRP to the cell's surface, resulting in an increased BCRP efflux activity, reduced sensitivity to the anticancer drug Mitoxantrone, and high proliferation relative to control cells. These observations correlated with increased levels of cell survival proteins, BcL-2 and PARP1. Further studies also implicated the lysosomal pathway for the observed variation in BCRP levels among the cell variants. RNASeq data analysis of clinical samples revealed higher CASD1 expression as a favorable marker of survival in lung adenocarcinoma. Collectively, our findings indicate that deacetylated Sia is utilized by colon and lung cancers to engage in MDR via overexpression and efflux action of BCRP.
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Affiliation(s)
- Isaac Tuffour
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD, United States
| | - Setor Amuzu
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Hala Bayoumi
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD, United States
| | - Iram Surtaj
- Department of Medical Sciences, American University of Iraq, Sulaimani, Iraq
| | - Colin Parrish
- Baker Institute for Animal Health, Department of Microbiology and Immunology College of Veterinary Medicine, Cornell University, Ithaca, NY, United States
| | - Rachel Willand-Charnley
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD, United States
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Alkali-labile gangliosides. Glycoconj J 2023; 40:269-276. [PMID: 36695939 DOI: 10.1007/s10719-023-10103-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 01/09/2023] [Accepted: 01/13/2023] [Indexed: 01/26/2023]
Abstract
The structure and properties of a group of gangliosides modified by mild alkaline treatment are discussed. We will present the occurrence and the structure of gangliosides carrying the N-acetyneuraminic acid O-acetylated in position 9, the Neu5,9Ac2, and of gangliosides carrying a sialic acid that forms a lactone ring. Starting from biochemical data we will discuss the possible biochemical role played by these gangliosides in the processes of cell signaling and maintenance of brain functions.
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Shen J, Zhu B, Chen Z, Jia L, Sun S. Precision Characterization of Site-Specific O-Acetylated Sialic Acids on N-Glycoproteins. Anal Chem 2023; 95:1995-2003. [PMID: 36633944 DOI: 10.1021/acs.analchem.2c04358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
O-Acetylation is a common modification of sialic acid, playing a significant role in glycoprotein stability, immune response, and cell development. Due to the lack of efficient methods for direct analysis of O-acetylated sialoglycopeptides (O-AcSGPs), the majority of identified O-acetylated sialic acids (O-AcSia) until now had no glycosite/glycoprotein information. Herein, we introduced a new workflow for precise interpretation of O-AcSGPs with probability estimation by recognizing the characteristic B and Y ions of O-AcSias. With further optimization of mass spectrometry parameters, the method allowed us to identify a total of 171 unique O-AcSGPs in mouse serum. Although the majority of these O-AcSGPs were at a relatively low abundance compared with their non-O-acetylated states, they were mainly involved in peptidase/endopeptidase inhibitor activities. The method paves the way for large-scale structural and functional analyses of site-specific O-AcSias in various complex samples as well as further identification of many other similar chemical modifications on glycoproteins.
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Affiliation(s)
- Jiechen Shen
- College of Life Sciences, Northwest University, Xi'an 710069, P. R. China
| | - Bojing Zhu
- College of Life Sciences, Northwest University, Xi'an 710069, P. R. China
| | - Zexuan Chen
- College of Life Sciences, Northwest University, Xi'an 710069, P. R. China
| | - Li Jia
- College of Life Sciences, Northwest University, Xi'an 710069, P. R. China
| | - Shisheng Sun
- College of Life Sciences, Northwest University, Xi'an 710069, P. R. China
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Scott H, Davies GJ, Armstrong Z. The structure of Phocaeicola vulgatus sialic acid acetylesterase. ACTA CRYSTALLOGRAPHICA SECTION D STRUCTURAL BIOLOGY 2022; 78:647-657. [PMID: 35503212 PMCID: PMC9063846 DOI: 10.1107/s2059798322003357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 03/24/2022] [Indexed: 11/16/2022]
Abstract
The sialic acid acetylesterase from P. vulgatus was produced heterologously in Escherichia coli, purified and crystallized in two different crystal forms, from which structures at 1.44 and 2.06 Å resolution were obtained. Sialic acids terminate many N- and O-glycans and are widely distributed on cell surfaces. There are a diverse range of enzymes which interact with these sugars throughout the tree of life. They can act as receptors for influenza and specific betacoronaviruses in viral binding and their cleavage is important in virion release. Sialic acids are also exploited by both commensal and pathogenic bacteria for nutrient acquisition. A common modification of sialic acid is 9-O-acetylation, which can limit the action of sialidases. Some bacteria, including human endosymbionts, employ esterases to overcome this modification. However, few bacterial sialic acid 9-O-acetylesterases (9-O-SAEs) have been structurally characterized. Here, the crystal structure of a 9-O-SAE from Phocaeicola vulgatus (PvSAE) is reported. The structure of PvSAE was determined to resolutions of 1.44 and 2.06 Å using crystals from two different crystallization conditions. Structural characterization revealed PvSAE to be a dimer with an SGNH fold, named after the conserved sequence motif of this family, and a Ser–His–Asp catalytic triad. These structures also reveal flexibility in the most N-terminal α-helix, which provides a barrier to active-site accessibility. Biochemical assays also show that PvSAE deacetylates both mucin and the acetylated chromophore para-nitrophenyl acetate. This structural and biochemical characterization of PvSAE furthers the understanding of 9-O-SAEs and may aid in the discovery of small molecules targeting this class of enzyme.
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Visser EA, Moons SJ, Timmermans SBPE, de Jong H, Boltje TJ, Büll C. Sialic acid O-acetylation: From biosynthesis to roles in health and disease. J Biol Chem 2021; 297:100906. [PMID: 34157283 PMCID: PMC8319020 DOI: 10.1016/j.jbc.2021.100906] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 06/16/2021] [Accepted: 06/18/2021] [Indexed: 02/06/2023] Open
Abstract
Sialic acids are nine-carbon sugars that frequently cap glycans at the cell surface in cells of vertebrates as well as cells of certain types of invertebrates and bacteria. The nine-carbon backbone of sialic acids can undergo extensive enzymatic modification in nature and O-acetylation at the C-4/7/8/9 position in particular is widely observed. In recent years, the detection and analysis of O-acetylated sialic acids have advanced, and sialic acid-specific O-acetyltransferases (SOATs) and O-acetylesterases (SIAEs) that add and remove O-acetyl groups, respectively, have been identified and characterized in mammalian cells, invertebrates, bacteria, and viruses. These advances now allow us to draw a more complete picture of the biosynthetic pathway of the diverse O-acetylated sialic acids to drive the generation of genetically and biochemically engineered model cell lines and organisms with altered expression of O-acetylated sialic acids for dissection of their roles in glycoprotein stability, development, and immune recognition, as well as discovery of novel functions. Furthermore, a growing number of studies associate sialic acid O-acetylation with cancer, autoimmunity, and infection, providing rationale for the development of selective probes and inhibitors of SOATs and SIAEs. Here, we discuss the current insights into the biosynthesis and biological functions of O-acetylated sialic acids and review the evidence linking this modification to disease. Furthermore, we discuss emerging strategies for the design, synthesis, and potential application of unnatural O-acetylated sialic acids and inhibitors of SOATs and SIAEs that may enable therapeutic targeting of this versatile sialic acid modification.
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Affiliation(s)
- Eline A Visser
- Institute for Molecules and Materials, Department of Synthetic Organic Chemistry, Radboud University Nijmegen, Nijmegen, the Netherlands
| | - Sam J Moons
- Institute for Molecules and Materials, Department of Synthetic Organic Chemistry, Radboud University Nijmegen, Nijmegen, the Netherlands
| | - Suzanne B P E Timmermans
- Institute for Molecules and Materials, Department of Synthetic Organic Chemistry, Radboud University Nijmegen, Nijmegen, the Netherlands
| | - Heleen de Jong
- Institute for Molecules and Materials, Department of Synthetic Organic Chemistry, Radboud University Nijmegen, Nijmegen, the Netherlands
| | - Thomas J Boltje
- Institute for Molecules and Materials, Department of Synthetic Organic Chemistry, Radboud University Nijmegen, Nijmegen, the Netherlands.
| | - Christian Büll
- Copenhagen Center for Glycomics, Departments of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark; Hubrecht Institute, Utrecht, the Netherlands.
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Prognostic significance of esterase gene expression in multiple myeloma. Br J Cancer 2021; 124:1428-1436. [PMID: 33531688 PMCID: PMC8039029 DOI: 10.1038/s41416-020-01237-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 12/04/2020] [Accepted: 12/11/2020] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Esterase enzymes differ in substrate specificity and biological function and may display dysregulated expression in cancer. This study evaluated the biological significance of esterase expression in multiple myeloma (MM). METHODS For gene expression profiling and evaluation of genomic variants in the Institute for Molecular Medicine Finland (FIMM) cohort, bone marrow aspirates were obtained from patients with newly diagnosed MM (NDMM) or relapsed/refractory MM (RRMM). CD138+ plasma cells were enriched and used for RNA sequencing and analysis, and to evaluate genomic variation. The Multiple Myeloma Research Foundation (MMRF) Relating Clinical Outcomes in MM to Personal Assessment of Genetic Profile (CoMMpass) dataset was used for validation of the findings from FIMM. RESULTS MM patients (NDMM, n = 56; RRMM, n = 78) provided 171 bone marrow aspirates (NDMM, n = 56; RRMM, n = 115). Specific esterases exhibited relatively high or low expression in MM, and expression of specific esterases (UCHL5, SIAE, ESD, PAFAH1B3, PNPLA4 and PON1) was significantly altered on progression from NDMM to RRMM. High expression of OVCA2, PAFAH1B3, SIAE and USP4, and low expression of PCED1B, were identified as poor prognostic markers (P < 0.05). The MMRF CoMMpass dataset provided validation that higher expression of PAFAH1B3 and SIAE, and lower expression of PCED1B, were associated with poor prognosis. CONCLUSIONS Esterase gene expression levels change as patients progress from NDMM to RRMM. High expression of OVCA2, PAFAH1B3, USP4 and SIAE, and low expression of PCED1B, are poor prognostic markers in MM, suggesting a role for these esterases in myeloma biology.
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Li B, Shen M, Yao H, Chen X, Xiao Z. Long Noncoding RNA TP73-AS1 Modulates Medulloblastoma Progression In Vitro And In Vivo By Sponging miR-494-3p And Targeting EIF5A2. Onco Targets Ther 2019; 12:9873-9885. [PMID: 31819485 PMCID: PMC6874156 DOI: 10.2147/ott.s228305] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 10/25/2019] [Indexed: 12/24/2022] Open
Abstract
Background Previous studies have shown that P73 antisense RNA 1T (non-protein coding), also known as TP73-AS1, is a long non-coding RNA (lncRNA) and involved in the development of medulloblastoma. However, the regulatory mechanism of lncRNA TP73-AS1 in medulloblastoma was still unclear, the present study was aimed to investigate the detailed functions and the mechanism of TP73-AS1 in regulation of medulloblastoma. Materials and methods The levels of TP73-AS1, miR-494-3p, and Eukaryotic initiation factor 5A2 (EIF5A2) were determined using quantitative real-time PCR (qRT-PCR), in situ hybridization (ISH), or Immunohistochemistry (IHC). The function of TP73-AS1 in proliferation, apoptosis, migration, and invasion of medulloblastoma cells was evaluated using cell counting Kit-8 (CCK-8), flow cytometry, and transwell assay, respectively. The protein levels were determined by Western blot. Bioinformatics analysis and dual-luciferase reporter assay, RNA immunoprecipitation (RIP) and pull-down assay were used to search and confirm the target gene of TP73-AS1 and miR-494-3p. The effect of TP73-AS1 knockdown in vivo was detected by animal experiment. Results The levels of TP73-AS1 and EIF5A2 were up-regulated, while miR-494-3p expression was down-regulated in medulloblastoma tissues and cells, ELF5A2 was a direct target of miR-494-3p, and miR-494-3p bound to TP73-AS1. The knockdown of TP73-AS1 inhibited cell proliferation, invasion, migration, and promoted apoptosis of medulloblastoma cells, while the miR-494-3p inhibitor abolished the effects of TP73-AS1 knockdown on medulloblastoma cells. Conclusion TP73-AS1 positively regulated EIF5A2 expression by sponging miR-494-3p. These findings suggested that TP73-AS1 served as an oncogene and promoted the progression of medulloblastoma.
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Affiliation(s)
- Bing Li
- Department of Neurosurgery, Shangqiu First People's Hospital, Shangqiu 476000, Henan, People's Republic of China
| | - Mingfeng Shen
- Department of Neurosurgery, Shangqiu First People's Hospital, Shangqiu 476000, Henan, People's Republic of China
| | - Hongwei Yao
- Department of Neurosurgery, Shangqiu First People's Hospital, Shangqiu 476000, Henan, People's Republic of China
| | - Xuan Chen
- Department of Neurosurgery, Shangqiu First People's Hospital, Shangqiu 476000, Henan, People's Republic of China
| | - Zhiqiang Xiao
- Department of Neurosurgery, Shangqiu First People's Hospital, Shangqiu 476000, Henan, People's Republic of China
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