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Guo C, Zhang M, Jin X, Zhu C, Qian J, Tao M. Exploring the regulatory role of FBXL19-AS1 in triple-negative breast cancer through the miR-378a-3p/OTUB2 axis. Cell Biochem Funct 2024; 42:e4020. [PMID: 38702967 DOI: 10.1002/cbf.4020] [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: 01/12/2024] [Revised: 04/01/2024] [Accepted: 04/13/2024] [Indexed: 05/06/2024]
Abstract
The regulatory potential of long noncoding RNA (lncRNA) FBXL19-AS1 has been highlighted in various cancers, but its effect on triple-negative breast cancer (TNBC) remains unclear. Here, we aimed to elucidate the role of FBXL19-AS1 in TNBC and its underlying mechanism. RT-qPCR was employed to detect the expressions of FBXL19-AS1 and miR-378a-3p in tissues and cells. Immunohistochemical staining and western blot were utilized to detect the expression levels of proteins. Cell activities were detected using flow cytometry, CCK-8, and transwell assay. Dual-luciferase reporter and RNA immunoprecipitation (RIP) assays were deployed to investigate interactions of different molecules. Protein-protein interaction (PPI) network, gene ontology (GO), and Kyoto encyclopedia of genes and genomes (KEGG) pathways were used to analyze the downstream pathway. In vivo xenograft model was conducted to detect the effect of FBXL19-AS1 on tumor growth. FBXL19-AS1 was overexpressed in TNBC tissues and cell lines compared with counterparts. FBXL19-AS1 knockdown suppressed TNBC cell activities, whereas its overexpression exhibited the opposite effect. Mechanistically, FBXL19-AS1 was found to interact with miR-378a-3p. Further analysis revealed that miR-378a-3p exerted tumor-suppressive effects in TNBC cells. Additionally, miR-378a-3p targeted and downregulated the expression of ubiquitin aldehyde binding 2 (OTUB2), a deubiquitinase associated with TNBC progression. In vivo experiments substantiated the inhibitory effects of FBXL19-AS1 knockdown on TNBC tumorigenesis, and a miR-378a-3p inhibitor partially rescued these effects. The downstream pathway of the miR-378a-3p/OTUB2 axis was explored, revealing connections with proteins involved in modifying other proteins, removing ubiquitin molecules, and influencing signaling pathways, including the Hippo signaling pathway. Western blot analysis confirmed changes in YAP and TAZ expression levels, indicating a potential regulatory network. In summary, FBXL19-AS1 promotes exacerbation in TNBC by suppressing miR-378a-3p, leading to increased OTUB2 expression. The downstream mechanism may be related to the Hippo signaling pathway. These findings propose potential therapeutic targets for TNBC treatment.
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Affiliation(s)
- Chenxu Guo
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, China
- Department of Oncology, Dushu Lake Hospital Affiliated to Soochow University, Suzhou, China
- Department of Surgical Oncology, The First Affiliated Hospital of Bengbu Medical University, Bengbu, China
| | - Mingliang Zhang
- Department of Surgical Oncology, The First Affiliated Hospital of Bengbu Medical University, Bengbu, China
| | - Xin Jin
- Department of Surgical Oncology, The First Affiliated Hospital of Bengbu Medical University, Bengbu, China
| | - Chao Zhu
- Department of Surgical Oncology, The First Affiliated Hospital of Bengbu Medical University, Bengbu, China
| | - Jun Qian
- Department of Surgical Oncology, The First Affiliated Hospital of Bengbu Medical University, Bengbu, China
| | - Min Tao
- Department of Oncology, The First Affiliated Hospital of Soochow University, Suzhou, China
- Department of Oncology, Dushu Lake Hospital Affiliated to Soochow University, Suzhou, China
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Xiao J, Wang L, Zhuang Y, Zhu Q, Li W, Liao H, Chen X, Liu Z. The deubiquitinase OTUB2 promotes cervical cancer growth through stabilizing FOXM1. Am J Transl Res 2024; 16:75-84. [PMID: 38322554 PMCID: PMC10839374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2023] [Accepted: 12/06/2023] [Indexed: 02/08/2024]
Abstract
OBJECTIVES Ovarian tumor (OTU) domain-containing ubiquitin aldehyde-binding protein Otubain2 (OTUB2) is an important cysteine protease with deubiquitinase activity in the OTU family. However, the role of OTUB2 in cervical cancer (CC) has not been investigated. METHODS OTUB2 expression was analyzed employing the CC data from The Cancer Genome Atlas (TCGA) database. Western blot and qRT-PCR analysis were performed to identify OTUB2 expression in CC. The oncogenic function of OTUB2 was identified through a series of in vitro and in vivo experiments. Tandem Mass Tag™ Quantitative Proteomics examination was used to identify potential targets of OTUB2. RESULTS OTUB2 was overexpressed in CC and was related to poor prognosis of patients. In our in-house cohort, we also showed that OTUB2 was overexpressed in tumor tissues of CC compared to para-tumor. Knockdown of OTUB2 suppressed CC cell growth whereas OTUB2 upregulation fostered the proliferation of cancer cells. Forkhead box M1 (FOXM1) was found to be a target of OTUB2. FOXM1 can be positively regulated by OTUB2 in CC cells. In human CC tissues, protein level of FOXM1 was positively correlated with OTUB2. FOXM1 was found to play a critical role in OTUB2-mediated CC cell growth. Mechanistically, OTUB2 could bind FOXM1 and deubiquitinate FOXM1 to stabilize it. CONCLUSION OTUB2 promotes CC progression through deubiquitinating and stabilizing FOXM1.
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Affiliation(s)
- Jing Xiao
- Department of Reproductive Medicine Center, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang UniversityNanchang 330006, Jiangxi, PR China
- Department of Obstetrics and Gynecology, Jiangxi Maternal and Child Health HospitalNanchang 330006, Jiangxi, PR China
| | - Liqun Wang
- Department of Obstetrics and Gynecology, Jiangxi Maternal and Child Health HospitalNanchang 330006, Jiangxi, PR China
| | - Yuan Zhuang
- Department of Obstetrics and Gynecology, Jiangxi Maternal and Child Health HospitalNanchang 330006, Jiangxi, PR China
| | - Qizhou Zhu
- Department of Obstetrics and Gynecology, Jiangxi Maternal and Child Health HospitalNanchang 330006, Jiangxi, PR China
| | - Weimei Li
- Department of Obstetrics and Gynecology, Jiangxi Maternal and Child Health HospitalNanchang 330006, Jiangxi, PR China
| | - Hong Liao
- Department of Obstetrics and Gynecology, Jiangxi Maternal and Child Health HospitalNanchang 330006, Jiangxi, PR China
| | - Xiaofang Chen
- Department of Obstetrics and Gynecology, Jiangxi Maternal and Child Health HospitalNanchang 330006, Jiangxi, PR China
| | - Zhaoxia Liu
- Department of Reproductive Medicine Center, The Second Affiliated Hospital, Jiangxi Medical College, Nanchang UniversityNanchang 330006, Jiangxi, PR China
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Song Y, Wu Q. RBM15 m 6 A modification-mediated OTUB2 upregulation promotes cervical cancer progression via the AKT/mTOR signaling. ENVIRONMENTAL TOXICOLOGY 2023; 38:2155-2164. [PMID: 37334762 DOI: 10.1002/tox.23852] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 05/05/2023] [Accepted: 05/28/2023] [Indexed: 06/20/2023]
Abstract
Cervical cancer (CC) is a deadly gynecological tumor worldwide. Otubain 2 (OTUB2) has been recently identified as an oncogene in human malignancies. However, its expression and function remain unclear. This work aims to explore the role of OTUB2 in CC progression. Herein, The Cancer Genome Atlas data revealed that OTUB2 expression was significantly upregulated in cervical squamous cell carcinoma and endocervical adenocarcinoma (CESC) and gradually increased with CESC progression; moreover, OTUB2 expression predicted poor outcomes of CESC patients. Then, RT-qPCR and Western blotting were applied to determine mRNA and protein expression in CC and normal cells. Our results confirmed that OTUB2 was highly expressed in CC cell lines. As indicated by CCK-8, Transwell, and flow cytometry results, OTUB2 silencing attenuated proliferative and metastatic capacities of CC cells but promoted CC cell apoptosis. Then, RBM15, an N6-methyladenosine (m6 A) methyltransferase "writer," was also demonstrated to be upregulated in CESC and CC cells. Mechanistically, m6 A RNA immunoprecipitation (Me-RIP) results showed that RBM15 inhibition reduced the m6 A methylation level of OTUB2 in CC cells, leading to the decline of OTUB2 expression. In addition, OTUB2 inhibition deactivated the AKT/mTOR signaling in CC cells. Furthermore, SC-79 (AKT/mTOR activator) partially abated the inhibitory effects of OTUB2 knockdown on the AKT/mTOR signaling pathway and the malignant phenotypes of CC cells. In summary, this work showed that RBM15-mediated m6 A modification led to OTUB2 upregulation, thereby promoting malignant behaviors of CC cells via the AKT/mTOR signaling pathway.
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Affiliation(s)
- Yan Song
- Department of Gynecology, Shanghai Changning Maternity and Infant Health Hospital, Shanghai, China
| | - Qiongwei Wu
- Department of Gynecology, Shanghai Changning Maternity and Infant Health Hospital, Shanghai, China
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Zhang Q, Zhang J, Yao A, Tian X, Han Z, Yuan Y, Tao K, Yang X. OTUB2 promotes the progression of endometrial cancer by regulating the PKM2-mediated PI3K/AKT signaling pathway. Cell Biol Int 2023; 47:428-438. [PMID: 36316812 DOI: 10.1002/cbin.11950] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 09/27/2022] [Accepted: 10/01/2022] [Indexed: 11/07/2022]
Abstract
Endometrial carcinoma (EC) morbidity and mortality have been increasing in recent years. Otubain 2 (OTUB2) was shown to be upregulated in EC patients, so the aim of this study was to explore the role of OTUB2 in EC. Cell Counting Kit-8 (CCK-8), colony formation, enzyme-linked immunosorbent assay, the wound healing assay, and Transwell invasion assays were used to investigate the specific role of OTUB2 in EC tumorigenesis. Real-time polymerase chain reaction and western blot analysis were used to detect the expression of OTUB2 in EC tissues and cells. OTUB2 is upregulated in EC patients and cell lines and is associated with a poor prognosis. The overexpression of OTUB2 promoted glycolysis and induced the proliferation, migration, and invasion of endometrial cancer cells. The silencing of OTUB2 had the opposite effect. In addition, the silencing of OTUB2 significantly suppressed the expression levels of PKM2. Importantly, inhibition of the PKM2/PI3K/AKT signaling pathway significantly reversed the promoting effect of OTUB2 overexpression on EC. OTUB2 regulated the proliferation and invasion of EC cells by regulating the PKM2/PI3K/AKT signaling pathway. OTUB2 may serve as a potential prognostic and therapeutic target in EC.
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Affiliation(s)
- Qian Zhang
- Department of The First of Internal Medicine, Shaanxi Provincial Cancer Hospital, Xi'an, Shannxi, People's Republic of China
| | - Jing Zhang
- Department of The Fourth of Gynecologic Oncology, Shaanxi Provincial Cancer Hospital, Xi'an, Shannxi, People's Republic of China
| | - Anmei Yao
- Department of The Second of Gynecologic Oncology, Shaanxi Provincial Cancer Hospital, Xi'an, Shannxi, People's Republic of China
| | - Xiaofei Tian
- Department of The Second of Gynecologic Oncology, Shaanxi Provincial Cancer Hospital, Xi'an, Shannxi, People's Republic of China
| | - Zhihong Han
- Department of The Second of Gynecologic Oncology, Shaanxi Provincial Cancer Hospital, Xi'an, Shannxi, People's Republic of China
| | - Yuan Yuan
- Department of The Second of Gynecologic Oncology, Shaanxi Provincial Cancer Hospital, Xi'an, Shannxi, People's Republic of China
| | - Kai Tao
- Department of The Second of Gynecologic Oncology, Shaanxi Provincial Cancer Hospital, Xi'an, Shannxi, People's Republic of China
| | - Xuemei Yang
- Department of The Second of Gynecologic Oncology, Shaanxi Provincial Cancer Hospital, Xi'an, Shannxi, People's Republic of China
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da Silva Z, Glanzner WG, Currin L, de Macedo MP, Gutierrez K, Guay V, Gonçalves PBD, Bordignon V. DNA Damage Induction Alters the Expression of Ubiquitin and SUMO Regulators in Preimplantation Stage Pig Embryos. Int J Mol Sci 2022; 23:ijms23179610. [PMID: 36077022 PMCID: PMC9455980 DOI: 10.3390/ijms23179610] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/17/2022] [Accepted: 08/23/2022] [Indexed: 11/18/2022] Open
Abstract
DNA damage in early-stage embryos impacts development and is a risk factor for segregation of altered genomes. DNA damage response (DDR) encompasses a sophisticated network of proteins involved in sensing, signaling, and repairing damage. DDR is regulated by reversible post-translational modifications including acetylation, methylation, phosphorylation, ubiquitylation, and SUMOylation. While important regulators of these processes have been characterized in somatic cells, their roles in early-stage embryos remain broadly unknown. The objective of this study was to explore how ubiquitylation and SUMOylation are involved in the regulation of early development in porcine embryos by assessing the mRNA profile of genes encoding ubiquitination (UBs), deubiquitination (DUBs), SUMOylation (SUMOs) or deSUMOylation (deSUMOs) enzymes in oocyte and embryos at different stages of development, and to evaluate if the induction of DNA damage at different stages of embryo development would alter the mRNA abundance of these genes. Pig embryos were produced by in vitro fertilization and DNA damage was induced by ultraviolet (UV) light exposure for 10 s on days 2, 4 or 7 of development. The relative mRNA abundance of most UBs, DUBs, SUMOs, and deSUMOs was higher in oocytes and early-stage embryos than in blastocysts. Transcript levels for UBs (RNF20, RNF40, RNF114, RNF169, CUL5, DCAF2, DECAF13, and DDB1), DUBs (USP16), and SUMOs (CBX4, UBA2 and UBC9), were upregulated in early-stage embryos (D2 and/or D4) compared to oocytes and blastocysts. In response to UV-induced DNA damage, transcript levels of several UBs, DUBs, SUMOs, and deSUMOs decreased in D2 and D4 embryos, but increased in blastocysts. These findings revealed that transcript levels of genes encoding for important UBs, DUBs, SUMOs, and deSUMOs are regulated during early embryo development and are modulated in response to induced DNA damage. This study has also identified candidate genes controlling post-translational modifications that may have relevant roles in the regulation of normal embryo development, repair of damaged DNA, and preservation of genome stability in the pig embryo.
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Affiliation(s)
- Zigomar da Silva
- Laboratory of Biotechnology and Animal Reproduction–BioRep, Federal University of Santa Maria, Santa Maria 97105-900, Brazil
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada
| | - Werner Giehl Glanzner
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada
| | - Luke Currin
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada
| | | | - Karina Gutierrez
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada
| | - Vanessa Guay
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada
| | - Paulo Bayard Dias Gonçalves
- Laboratory of Biotechnology and Animal Reproduction–BioRep, Federal University of Santa Maria, Santa Maria 97105-900, Brazil
| | - Vilceu Bordignon
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada
- Correspondence: ; Tel.: +1-514-398-7793
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Liu L, Cheng H, Ji M, Su L, Lu Z, Hu X, Guan Y, Xiao J, Ma L, Zhang W, Pu H. OTUB2 Regulates YAP1/TAZ to Promotes the Progression of Esophageal Squamous Cell Carcinoma. Biol Proced Online 2022; 24:10. [PMID: 35850645 PMCID: PMC9290284 DOI: 10.1186/s12575-022-00169-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 06/06/2022] [Indexed: 12/04/2022] Open
Abstract
Objective The effects of Otubain-2 (OTUB2) on the proliferation, invasion, and migration of esophageal squamous cell carcinoma (ESCC) were investigated by interfering with OTUB2 expression. Methods Bioinformatics analysis was used to analyze OTUB2 expression in esophageal carcinoma and interactions between OTUB2 and YAP1/TAZ. Paraffin-embedded ESCC tissues (n = 183) were selected for immunohistochemical staining to detect OTUB2, YAP1, TAZ, CTGF and their relationship with clinicopathological parameters, then the survival prognosis of ESCC patients was analyzed. Immunofluorescence, western blotting, and qRT-PCR were used to evaluate OTUB2 in ESCC cell lines. Cell lines with the highest expression of OTUB2 were transfected with lentivirus to knockdown OTUB2 levels. Changes in KYSE150 cell proliferation, migration, and invasion were measured using CCK-8, wound healing, and clone formation assays. The Transwell test and flow cytometry identified OTUB2 targets and explored roles and mechanisms involved in ESCC. Effects of OTUB2 on YAP1/TAZ signaling were also observed. Results Bioinformatics analysis revealed OTUB2 was highly expressed in esophageal cancer and was associated with YAP1/TAZ. Immunohistochemistry showed that OTUB2 expression was increased in ESCC samples compared to parcancerous tissue. YAP1 and TAZ were higher expression in ESCC tissues, mainly localized in the nucleus. Compared with controls, the proliferation, migration, and invasion ability of KYSE150 cells after OTUB2 knockdown were significantly reduced (P < 0.05). The protein expression levels of YAP1, TAZ and CTGF decreased after knocking down the expression of OTUB2 (P < 0.05). OTUB2 knockdown in ESCC cell lines suppressed YAP1/TAZ signaling. Conclusions OTUB2 regulated the protein expression of YAP1/TAZ to promote cell proliferation, migration, invasion, and tumor development. Therefore, OTUB2 may represent a biomarker for ESCC and a potential target for ESCC treatment. Supplementary Information The online version contains supplementary material available at 10.1186/s12575-022-00169-9.
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Affiliation(s)
- Li Liu
- Department of Pathology, First Affliated Hospital, Xinjiang Medical University, No. 137, Liyushan South Road, Urumqi, 830054, Xinjiang, China
| | - Hu Cheng
- Department of Anesthesiology, First Affliated Hospital, Xinjiang Medical University, Urumqi, Xinjiang, People's Republic of China
| | - Min Ji
- School of Basic Medicine, Xinjiang Medical University, Urumqi, Xinjiang, People's Republic of China
| | - Liping Su
- Department of Pathology, First Affliated Hospital, Xinjiang Medical University, No. 137, Liyushan South Road, Urumqi, 830054, Xinjiang, China
| | - Ziyang Lu
- Qilu Hospital, Jinan, Shandong Province, China
| | - Xiayun Hu
- Shanghai Changhai Hospital, Shanghai, China
| | - Yaling Guan
- School of Basic Medicine, Xinjiang Medical University, Urumqi, Xinjiang, People's Republic of China
| | - Jinling Xiao
- School of Basic Medicine, Xinjiang Medical University, Urumqi, Xinjiang, People's Republic of China
| | - Lijuan Ma
- School of Basic Medicine, Xinjiang Medical University, Urumqi, Xinjiang, People's Republic of China
| | - Wei Zhang
- Department of Pathology, First Affliated Hospital, Xinjiang Medical University, No. 137, Liyushan South Road, Urumqi, 830054, Xinjiang, China.
| | - Hongwei Pu
- Department of Discipline Construction, First Affliated Hospital, Xinjiang Medical University, No. 137, Liyushan South Road, Urumqi, 830054, Xinjiang, China.
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Li J, Zhang N, Li M, Hong T, Meng W, Ouyang T. The Emerging Role of OTUB2 in Diseases: From Cell Signaling Pathway to Physiological Function. Front Cell Dev Biol 2022; 10:820781. [PMID: 35309903 PMCID: PMC8926145 DOI: 10.3389/fcell.2022.820781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 02/03/2022] [Indexed: 11/13/2022] Open
Abstract
Ovarian tumor (OTU) domain-containing ubiquitin aldehyde-binding protein Otubain2 (OTUB2) was a functional cysteine protease in the OTU family with deubiquitinase activity. In recent years, with the wide application of molecular biology techniques, molecular mechanism regulation at multiple levels of cell signaling pathways has been gradually known, such as ubiquitin-mediated protein degradation and phosphorylation-mediated protein activation. OTUB2 is involved in the deubiquitination of many key proteins in different cell signaling pathways, and the effect of OTUB2 on human health or disease is not clear. OTUB2 is likely to cause cancer and other malignant diseases while maintaining normal human development and physiological function. Therefore, it is of great value to comprehensively understand the regulatory mechanism of OTUB2 and regard it as a target for the treatment of diseases. This review makes a general description and appropriate analysis of OTUB2's regulation in different cell signaling pathways, and connects OTUB2 with cancer from the research hotspot perspective of DNA damage repair and immunity, laying the theoretical foundation for future research.
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Affiliation(s)
- Jun Li
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Jiangxi, China.,Department of the Second Clinical Medical College of Nanchang University, Jiangxi, China
| | - Na Zhang
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Jiangxi, China
| | - Meihua Li
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Jiangxi, China
| | - Tao Hong
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Jiangxi, China
| | - Wei Meng
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Jiangxi, China
| | - Taohui Ouyang
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Jiangxi, China
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