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Tsai CY, Ko HJ, Chiou SJ, Lin XY, Chuang TH, Cheng JT, Su YF, Loh JK, Hong YR. GSKIP modulates cell aggregation through EMT/MET signaling rather than differentiation in SH-SY5Y human neuroblastoma cells. J Cell Commun Signal 2023; 17:1039-1054. [PMID: 37133713 PMCID: PMC10409706 DOI: 10.1007/s12079-023-00752-z] [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: 08/03/2022] [Accepted: 04/18/2023] [Indexed: 05/04/2023] Open
Abstract
GSK3β interacting protein (GSKIP) is a small A-kinase anchor protein previously reported to mediate the N-cadherin/β-catenin pool for differentiation in SH-SY5Y cells through overexpression of GSKIP to present the neuron outgrowth phenotype. To further investigate how GSKIP functions in neurons, CRISPR/Cas9 technology was utilized to knock out GSKIP (GSKIP-KO) in SH-SY5Y. Several GSKIP-KO clones resulted in an aggregation phenotype and reduced cell growth without retinoic acid (RA) treatment. However, neuron outgrowth was still observed in GSKIP-KO clones treated with RA. The GSKIP-KO clones exhibited an aggregation phenotype through suppression of GSK3β/β-catenin pathways and cell cycle progression rather than cell differentiation. Gene set enrichment analysis indicated that GSKIP-KO was related to epithelial mesenchymal transition/mesenchymal epithelial transition (EMT/MET) and Wnt/β-catenin/cadherin signaling pathways, suppressing cell migration and tumorigenesis through the inhibition of Wnt/β-catenin mediated EMT/MET. Conversely, reintroduction of GSKIP into GSKIP-KO clones restored cell migration and tumorigenesis. Notably, phosphor-β-catenin (S675) and β-catenin (S552) but not phosphor-β-catenin (S33/S37/T41) translocated into the nucleus for further gene activation. Collectively, these results suggested that GSKIP may function as an oncogene to form an aggregation phenotype for cell survival in harsh environments through EMT/MET rather than differentiation in the GSKIP-KO of SH-SY5Y cells. GSKIP Implication in Signaling Pathways with Potential Impact on SHSY-5Y Cell Aggregation.
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Affiliation(s)
- Cheng-Yu Tsai
- Division of Neurosurgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
- Post Baccalaureate Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Huey-Jiun Ko
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 807, Taiwan
- Department of Biochemistry, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 807, Taiwan
| | - Shean-Jaw Chiou
- Department of Biochemistry, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 807, Taiwan
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, 807, Taiwan
| | - Xin-Yi Lin
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 807, Taiwan
- Department of Biochemistry, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 807, Taiwan
| | - Tsung-Hsien Chuang
- Immunology Research Center, National Health Research Institutes, Miaoli, 350, Taiwan
| | - Jiin-Tsuey Cheng
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung, 804, Taiwan
| | - Yu-Feng Su
- Post Baccalaureate Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Joon-Khim Loh
- Division of Neurosurgery, Department of Surgery, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan.
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 807, Taiwan.
| | - Yi-Ren Hong
- Graduate Institute of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 807, Taiwan.
- Department of Biochemistry, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, 807, Taiwan.
- Department of Medical Research, Kaohsiung Medical University Hospital, Kaohsiung, 807, Taiwan.
- Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung, 804, Taiwan.
- Center for Cancer Research, Kaohsiung Medical University, Kaohsiung, 807, Taiwan.
- Neuroscience Research Center, Kaohsiung Medical University, Kaohsiung, 807, Taiwan.
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Liu M, Huo Y, Cheng Y. Mechanistic Regulation of Wnt Pathway-Related Progression of Chronic Obstructive Pulmonary Disease Airway Lesions. Int J Chron Obstruct Pulmon Dis 2023; 18:871-880. [PMID: 37215745 PMCID: PMC10198175 DOI: 10.2147/copd.s391487] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 04/28/2023] [Indexed: 05/24/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a chronic disease associated with inflammation and structural changes in the airways and lungs, resulting from a combination of genetic and environmental factors. This interaction highlights significant genes in early life, particularly those involved in lung development, such as the Wnt signaling pathway. The Wnt signaling pathway plays an important role in cell homeostasis, and its abnormal activation can lead to the occurrence of related diseases such as asthma, COPD, and lung cancer. Due to the fact that the Wnt pathway is mechanically sensitive, abnormal activation of the Wnt pathway by mechanical stress contributes to the progression of chronic diseases. But in the context of COPD, it has received little attention. In this review, we aim to summarize the important current evidence on mechanical stress through the Wnt pathway in airway inflammation and structural changes in COPD and to provide potential targets for COPD treatment strategies.
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Affiliation(s)
- Minrong Liu
- Department of Respiratory and Critical Care Medicine, The Third Affiliated Hospital, Southern Medical University, Guangzhou, Guangdong, 510630, People’s Republic of China
| | - Yating Huo
- Department of Respiratory and Critical Care Medicine, The Third Affiliated Hospital, Southern Medical University, Guangzhou, Guangdong, 510630, People’s Republic of China
| | - Yuanxiong Cheng
- Department of Respiratory and Critical Care Medicine, The Third Affiliated Hospital, Southern Medical University, Guangzhou, Guangdong, 510630, People’s Republic of China
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Gao ZX, Zhang ZS, Qin J, Zhang MZ, Cao JL, Li YY, Wang MQ, Hou LL, Fang D, Xie SQ. Aucubin enhances the antitumor activity of cisplatin through the inhibition of PD-L1 expression in hepatocellular carcinoma. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 112:154715. [PMID: 36821999 DOI: 10.1016/j.phymed.2023.154715] [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: 09/23/2022] [Revised: 01/27/2023] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) is a leading cause of cancer-associated mortality in the world. However, the anticancer effects of aucubin against HCC have yet to be reported. Cisplatin often decreased CD8+ tumor-infiltrating lymphocytes in the tumor microenvironment through increasing programmed death-ligand 1 (PD-L1) expression, which seriously affected the prognostic effect of cisplatin in the treatment of patients with HCC. Therefore, it is necessary to identify a novel therapeutic avenue to increase the sensitivity of cisplatin against HCC. PURPOSE This study aims to evaluate the anti-tumor effect of aucubin on HCC, and also to reveal the synergistic effects and mechanism of aucubin and cisplatin against HCC. STUDY DESIGN AND METHODS An H22 xenograft mouse model was established for the in vivo experiments. Cancer cell proliferation was detected by MTT assay. RT-qPCR was performed to analyze CD274 mRNA expression in vitro. Western blotting was employed to determine the expression levels of the PD-L1, p-Akt, Akt, p-β-catenin, and β-catenin in vitro. Immunofluorescence was carried out to examine β-catenin nuclear accumulation in HCC cells. Immunohistochemistry was used to detect tumoral PD-L1 and CD8α expression in xenograft mouse model. RESULTS Aucubin inhibits tumor growth in a xenograft HCC mouse model, but did not affect HCC cell viability in vitro. Aucubin treatment significantly inhibited PD-L1 expression through inactivating Akt/β-catenin signaling pathway in HCC cells. Overexpression of PD-L1 dramatically reversed aucubin-mediated tumoral CD8+ T cell infiltration and alleviated the antitumor activity of aucubin in xenograft mouse model. Moreover, Cisplatin could induce the expression of PD-L1 through the activation of the Akt/β-catenin signaling pathway in HCC cells, which can be blocked by aucubin in vitro. In xenograft mouse model, cisplatin treatment induced PD-L1 expression and alleviated the infiltration of CD8+ T lymphocytes in the tumor microenvironment. Aucubin not only abrogated cisplatin-induced PD-L1 expression but also enhanced the antitumor efficacy of cisplatin in a mouse xenograft model of HCC. CONCLUSION Aucubin exerts antitumor activity against HCC and also enhances the antitumor activity of cisplatin by suppressing the Akt/β-catenin/PD-L1 axis.
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Affiliation(s)
- Zi-Xuan Gao
- Institute of Chemical Biology, School of Pharmacy, Henan University, N. Jinming Ave, Kaifeng 475004, China
| | - Zhan-Sheng Zhang
- Institute of Chemical Biology, School of Pharmacy, Henan University, N. Jinming Ave, Kaifeng 475004, China; The Academy for Advanced Interdisplinary Studies, Henan University, N. Jinming Ave, Kaifeng 475004, China
| | - Jia Qin
- Institute of Chemical Biology, School of Pharmacy, Henan University, N. Jinming Ave, Kaifeng 475004, China
| | - Ming-Zhu Zhang
- Institute of Chemical Biology, School of Pharmacy, Henan University, N. Jinming Ave, Kaifeng 475004, China
| | - Jin-Lan Cao
- Institute of Chemical Biology, School of Pharmacy, Henan University, N. Jinming Ave, Kaifeng 475004, China
| | - Ying-Ying Li
- Institute of Chemical Biology, School of Pharmacy, Henan University, N. Jinming Ave, Kaifeng 475004, China
| | - Meng-Qing Wang
- Institute of Chemical Biology, School of Pharmacy, Henan University, N. Jinming Ave, Kaifeng 475004, China
| | - Li-Li Hou
- Institute of Chemical Biology, School of Pharmacy, Henan University, N. Jinming Ave, Kaifeng 475004, China; The Academy for Advanced Interdisplinary Studies, Henan University, N. Jinming Ave, Kaifeng 475004, China
| | - Dong Fang
- Institute of Chemical Biology, School of Pharmacy, Henan University, N. Jinming Ave, Kaifeng 475004, China; The Academy for Advanced Interdisplinary Studies, Henan University, N. Jinming Ave, Kaifeng 475004, China; Henan Province Engineering Research Center of High Value Utilization to Natural Medical Resource in Yellow River Basin, Kaifeng 475004, China.
| | - Song-Qiang Xie
- Institute of Chemical Biology, School of Pharmacy, Henan University, N. Jinming Ave, Kaifeng 475004, China; The Academy for Advanced Interdisplinary Studies, Henan University, N. Jinming Ave, Kaifeng 475004, China; Henan Province Engineering Research Center of High Value Utilization to Natural Medical Resource in Yellow River Basin, Kaifeng 475004, China.
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Shah K, Kazi JU. Phosphorylation-Dependent Regulation of WNT/Beta-Catenin Signaling. Front Oncol 2022; 12:858782. [PMID: 35359365 PMCID: PMC8964056 DOI: 10.3389/fonc.2022.858782] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 02/16/2022] [Indexed: 01/11/2023] Open
Abstract
WNT/β-catenin signaling is a highly complex pathway that plays diverse roles in various cellular processes. While WNT ligands usually signal through their dedicated Frizzled receptors, the decision to signal in a β-catenin-dependent or -independent manner rests upon the type of co-receptors used. Canonical WNT signaling is β-catenin-dependent, whereas non-canonical WNT signaling is β-catenin-independent according to the classical definition. This still holds true, albeit with some added complexity, as both the pathways seem to cross-talk with intertwined networks that involve the use of different ligands, receptors, and co-receptors. β-catenin can be directly phosphorylated by various kinases governing its participation in either canonical or non-canonical pathways. Moreover, the co-activators that associate with β-catenin determine the output of the pathway in terms of induction of genes promoting proliferation or differentiation. In this review, we provide an overview of how protein phosphorylation controls WNT/β-catenin signaling, particularly in human cancer.
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Affiliation(s)
- Kinjal Shah
- Division of Translational Cancer Research, Department of Laboratory Medicine, Lund University, Lund, Sweden
- Lund Stem Cell Center, Department of Laboratory Medicine, Lund University, Lund, Sweden
| | - Julhash U. Kazi
- Division of Translational Cancer Research, Department of Laboratory Medicine, Lund University, Lund, Sweden
- Lund Stem Cell Center, Department of Laboratory Medicine, Lund University, Lund, Sweden
- *Correspondence: Julhash U. Kazi,
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Mondal A, Goswami AM, Saha T. In silico prediction of the functional consequences of nsSNPs in human beta-catenin gene. GENE REPORTS 2021. [DOI: 10.1016/j.genrep.2021.101066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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The Expression of Selected Wnt Pathway Members (FZD6, AXIN2 and β-Catenin) in Canine Oral Squamous Cell Carcinoma and Acanthomatous Ameloblastoma. Animals (Basel) 2021; 11:ani11061615. [PMID: 34072517 PMCID: PMC8228298 DOI: 10.3390/ani11061615] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/18/2021] [Accepted: 05/24/2021] [Indexed: 12/11/2022] Open
Abstract
The Wnt signaling pathway is well known to be involved in many types of human cancer; however, in veterinary medicine, the investigation of individual Wnt members' expression, and their role in or association with oral tumor pathogenesis, is still underevaluated. We aim to determine the expression pattern of Frizzled-6 (FZD6) as one of the Wnt receptors in two of the most common canine oral neoplastic lesions-canine oral squamous cell carcinoma (COSCC) and canine acanthomatous ameloblastoma (CAA). While COSCC is a malignant tumor with aggressive biological behavior and a tendency to metastasize, CAA is a benign tumor with high local invasiveness. In CAA, the expression of FZD6 was mostly located in the center of the epithelial tumorous tissue, and cells exhibiting features of squamous metaplasia were strongly positive. In well-differentiated COSCC, FZD6 was expressed in the tumorous epithelium as well as the tumorous stroma. There was a negative correlation between cytokeratin expression and FZD6 expression in COSCC, where the central parts of the epithelial tumorous tissue were often FZD6-negative. The non-differentiated COSCC with low expression of cytokeratin exhibited a diffuse FZD6 signal. The invasive front with areas of tumor budding exhibited high FZD6 expression with a loss of cytokeratin expression. Moreover, the expression of β-catenin and AXIN2 was increased in comparison to gingiva. In conclusion, our study revealed significant differences in the expression patterns and the levels of FZD6 between COSCC and CAA, indicating the differential engagement of the Wnt pathway in these tumors.
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Mafficini A, Lawlor RT, Ghimenton C, Antonello D, Cantù C, Paolino G, Nottegar A, Piredda ML, Salvia R, Milella M, Dei Tos AP, Fassan M, Scarpa A, Luchini C. Solid Pseudopapillary Neoplasm of the Pancreas and Abdominal Desmoid Tumor in a Patient Carrying Two Different BRCA2 Germline Mutations: New Horizons from Tumor Molecular Profiling. Genes (Basel) 2021; 12:genes12040481. [PMID: 33810291 PMCID: PMC8065547 DOI: 10.3390/genes12040481] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 03/19/2021] [Accepted: 03/25/2021] [Indexed: 02/08/2023] Open
Abstract
This case report describes the history of a 41 year-old woman with a solid pseudopapillary neoplasm (SPN) of the pancreas and a metachronous abdominal desmoid tumor (DT) that occurred two years after the SPN surgical resection. At next-generation sequencing of 174 cancer-related genes, both neoplasms harbored a CTNNB1 somatic mutation which was different in each tumor. Moreover, two BRCA2 pathogenic mutations were found in both tumors, confirmed as germline by the sequencing of normal tissue. The BRCA2 mutations were c.631G>A, resulting in the amino-acid change p.V211I, and c.7008-2A>T, causing a splice acceptor site loss. However, as the two neoplasms showed neither loss of heterozygosity nor somatic mutation in the second BRCA2 allele, they cannot be considered as BRCA-dependent tumors. Nevertheless, this study highlights the important opportunities opened by extensive tumor molecular profiling. In this particular case, it permitted the detection of BRCA2-germline mutations, essential for addressing the necessary BRCA-related genetic counseling, surveillance, and screening for the patient and her family.
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Affiliation(s)
- Andrea Mafficini
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, 37134 Verona, Italy; (A.M.); (R.T.L.); (C.C.); (A.N.); (A.S.)
| | - Rita T. Lawlor
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, 37134 Verona, Italy; (A.M.); (R.T.L.); (C.C.); (A.N.); (A.S.)
| | - Claudio Ghimenton
- ARC-Net Research Centre, University and Hospital Trust of Verona, 37134 Verona, Italy; (C.G.); (G.P.); (M.L.P.)
| | - Davide Antonello
- Department of Surgery, The Pancreas Institute, University of Verona, 37134 Verona, Italy; (D.A.); (R.S.)
| | - Cinzia Cantù
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, 37134 Verona, Italy; (A.M.); (R.T.L.); (C.C.); (A.N.); (A.S.)
| | - Gaetano Paolino
- ARC-Net Research Centre, University and Hospital Trust of Verona, 37134 Verona, Italy; (C.G.); (G.P.); (M.L.P.)
| | - Alessia Nottegar
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, 37134 Verona, Italy; (A.M.); (R.T.L.); (C.C.); (A.N.); (A.S.)
| | - Maria L. Piredda
- ARC-Net Research Centre, University and Hospital Trust of Verona, 37134 Verona, Italy; (C.G.); (G.P.); (M.L.P.)
| | - Roberto Salvia
- Department of Surgery, The Pancreas Institute, University of Verona, 37134 Verona, Italy; (D.A.); (R.S.)
| | - Michele Milella
- Department of Medicine, Section of Medical Oncology, University of Verona, 37134 Verona, Italy;
| | - Angelo P. Dei Tos
- Department of Medicine (DIMED), Section of Pathological Anatomy, University of Padua, 35121 Padua, Italy; (A.P.D.T.); (M.F.)
| | - Matteo Fassan
- Department of Medicine (DIMED), Section of Pathological Anatomy, University of Padua, 35121 Padua, Italy; (A.P.D.T.); (M.F.)
| | - Aldo Scarpa
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, 37134 Verona, Italy; (A.M.); (R.T.L.); (C.C.); (A.N.); (A.S.)
- ARC-Net Research Centre, University and Hospital Trust of Verona, 37134 Verona, Italy; (C.G.); (G.P.); (M.L.P.)
| | - Claudio Luchini
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, 37134 Verona, Italy; (A.M.); (R.T.L.); (C.C.); (A.N.); (A.S.)
- Correspondence: ; Tel.: +39-045-8127548
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Donmez HG. β-Catenin immunocytochemical reactivity in cervicovaginal smears during regular menstrual cycles. ASIAN BIOMED 2020; 14:187-194. [PMID: 37551267 PMCID: PMC10373400 DOI: 10.1515/abm-2020-0027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
Background β-Catenin mediates cellular adhesion and the Wnt/β-catenin signaling mechanism, thereby controlling cell proliferation and differentiation. Studies of endometrial tissue suggest that there are differences in β-catenin expression during the course of regular menstrual cycles. However, differences in expression in squamous epithelial cells between the proliferative and secretory phases have hitherto remained unknown. Objectives To localize β-catenin in squamous epithelial cells in cervicovaginal smears during the course of regular menstrual cycles. Methods In this observational study, smears were taken from women (n = 102) with various gynecological complaints. Squamous epithelial cells were stained using a Papanicolaou method to evaluate their cytology and any infection. An anti-β-catenin antibody was used to localize immunoreactivity in the cell membrane, cytoplasm, and/or nucleus. Results Women with a regular menstrual cycle (n = 62) were divided into 2 groups: those in a proliferative phase (26/62, 42%) and those in a secretory phase (36/62, 58%). Cytoplasmic and nuclear β-catenin immunoreactivity was observed prominently in the proliferative phase (19/26, 73%), whereas low-level β-catenin immunoreactivity was seen in the secretory phase (9/36, 25%). Compared with the secretory phase, the mean H-scores for β-catenin immunoreactivity in the proliferative phase were significantly increased in the membrane (P = 0.039), the cytoplasm (P < 0.001), and the nucleus (P = 0.033). By contrast, β-catenin immunoreactivity was reduced from parabasal to superficial cells in both the proliferative and secretory phases. Conclusions Cytoplasmic and/or nuclear β-catenin immunoreactivity may indicate that the activity of the Wnt/β-catenin signaling pathway is cycle dependent.
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Affiliation(s)
- Hanife Guler Donmez
- Department of Biology, Faculty of Science, Hacettepe University, Beytepe Campus, 06800Ankara, Turkey
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Novel Mutations in Pilomatrixoma, CTNNB1 p.s45F, and FGFR2 p.s252L: A Report of Three Cases Diagnosed by Fine-Needle Aspiration Biopsy, with Review of the Literature. Case Rep Genet 2020; 2020:8831006. [PMID: 32908727 PMCID: PMC7475758 DOI: 10.1155/2020/8831006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2020] [Revised: 08/07/2020] [Accepted: 08/12/2020] [Indexed: 11/18/2022] Open
Abstract
Pilomatrixoma (calcifying epithelioma of Malherbe) is an uncommon benign skin appendageal tumor that differentiates toward hair matrix cells. It is misdiagnosed in up to 75% of cases by nondermatologists. Although the histopathological findings are well recognized and characteristic, diagnosis by fine-needle aspiration biopsy may be quite challenging. Several reports have emphasized the challenges in cytodiagnosis of pilomatrixoma, leading to a false-positive diagnosis. The lesions may show avidity for fludeoxyglucose on positron emission tomography/computed tomography scan, raising concern of a possible malignant neoplasm. CTNNB1 mutations have been reported in a high percentage of pilomatrixomas. Expression of β-catenin, the protein encoded by CTNNB1, is also frequently observed. To determine if routine cytological specimens can be successfully used to perform additional investigation and support or confirm the diagnosis in three cases of pilomatrixoma, we performed molecular analysis and immunohistochemistry to search for CTNNB1 mutation and β-catenin, respectively. β-Catenin positivity by immunohistochemistry was observed in basaloid cells in all three cases. Exon 3 mutations in CTNNB1 were detected in all cases. In addition, we detected a fibroblast growth factor receptor 2 (FGFR2) mutation in one of the cases. We reviewed the literature and present the clinical and morphological characteristics that must be considered along with other findings to accurately achieve the correct diagnosis, in correlation with the results of the ancillary technique. In conclusion, routine cytological specimens can be successfully used to perform additional investigations and support cytodiagnosis in difficult cases.
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Immunodetection of Epithelial-Mesenchymal Transition and Tumor Proliferation Markers in GLi-1-positive Oral Squamous Cell Carcinoma. Appl Immunohistochem Mol Morphol 2020; 29:335-344. [PMID: 32769440 DOI: 10.1097/pai.0000000000000866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 07/01/2020] [Indexed: 12/17/2022]
Abstract
In oral squamous cell carcinoma (OSCC), involvement and activation of the Hedgehog pathway (HH) may be related to epithelial-mesenchymal transition and cell proliferation. The present study aimed to evaluate epithelial-mesenchymal transition and proliferative potential in OSCC cases demonstrating activation of the HH pathway. Twenty-three GLi-1-positive OSCC cases were submitted to immunohistochemical detection of Snail, Slug, N-cadherin, E-cadherin, β-catenin, and MCM3 proteins. Clinical-pathologic immunoexpression data were obtained from the invasion front and tumor islets, and then compared. At the invasion front, OSCC cases presented positive Snail, Slug, and MCM3 expression in the nuclei of tumor cells. Loss of membrane and cytoplasmic expression of E-cadherin and β-catenin was also observed. Positive N-cadherin expression was observed in 31.78% of the cases. GLi-1 immunoexpression was associated with loss of membrane E-cadherin (P<0.001), membrane β-catenin (P<0.001), and cytoplasmic β-catenin (P=0.02) expression. In the tumor islets, we observed nuclear expression of GLi-1, Snail, Slug, and MCM3. E-cadherin and β-catenin showed positivity in tumor cell membranes. Statistically significant positive correlations between GLi-1 and Snail (P=0.05), E-cadherin (P=0.01), and cytoplasmic β-catenin (P=0.04) were found. GLi-1 was associated with clinical staging, while membrane β-catenin expression was related to the presence of metastasis in lymph nodes and to clinical staging. The HH pathway may be involved in regulating the expression of the mesenchymal phenotype. The loss of membrane E-cadherin and β-catenin expression was observed at the tumor front region, whereas cell adhesion protein expression was detected in tumor islets regardless of MCM3.
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Wang B, Li X, Liu L, Wang M. β-Catenin: oncogenic role and therapeutic target in cervical cancer. Biol Res 2020; 53:33. [PMID: 32758292 PMCID: PMC7405349 DOI: 10.1186/s40659-020-00301-7] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 07/28/2020] [Indexed: 12/23/2022] Open
Abstract
Cervical cancer is a common and fatal malignancy of the female reproductive system. Human papillomavirus (HPV) is the primary causal agent for cervical cancer, but HPV infection alone is insufficient to cause the disease. Actually, most HPV infections are sub-clinical and cleared spontaneously by the host immune system; very few persist and eventually develop into cervical cancer. Therefore, other host or environmental alterations could also contribute to the malignant phenotype. One of the candidate co-factors is the β-catenin protein, a pivotal component of the Wnt/β-catenin signaling pathway. β-Catenin mainly implicates two major cellular activities: cell–cell adhesion and signal transduction. Recent studies have indicated that an imbalance in the structural and signaling properties of β-catenin leads to various cancers, such as cervical cancer. In this review, we will systematically summarize the role of β-catenin in cervical cancer and provide new insights into therapeutic strategies.
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Affiliation(s)
- Bingqi Wang
- Department of Laboratory Medicine, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Xianping Li
- Department of Laboratory Medicine, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Lei Liu
- Department of Laboratory Medicine, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Min Wang
- Department of Laboratory Medicine, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.
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Wei B, Wang Y, Wang J, Cai X, Xu L, Wu J, Wang Y, Liu W, Gu Y, Guo W, Xu Q. Apatinib suppresses tumor progression and enhances cisplatin sensitivity in esophageal cancer via the Akt/β-catenin pathway. Cancer Cell Int 2020; 20:198. [PMID: 32514243 PMCID: PMC7254695 DOI: 10.1186/s12935-020-01290-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 05/22/2020] [Indexed: 02/08/2023] Open
Abstract
Background Esophageal cancer is the sixth leading cause of cancer-related mortality worldwide, which is partially due to limited progress of therapy. Apatinib, an inhibitor of VEGFR2, has a promising antitumor effect on malignancies. However, the underlying mechanism of its antitumor effect on esophageal cancer remains poorly understood. Materials and methods Eighteen pairs of frozen esophageal cancer and their para-cancer samples and 25 paraffin specimens from advanced esophageal cancer patients treated with cisplatin-based regimen were collected. The effects of apatinib on cell growth, cell apoptosis, cell cycle and invasion/migration of esophageal cancer cells were assessed. Bioinformatics, luciferase reporter, immunoprecipitation and immunofluorescence assays were conducted for mechanic investigation. Quantitative RT-PCR, western blotting and immunohistochemistry were used to measure the expression of functional genes. Xenograft tumor growth of mice was performed. Results We found that VEGFR2 was highly expressed in esophageal cancer and associated with poor efficacy of cisplatin-based treatment. Apatinib displayed profound actions against tumor cell growth of human esophageal cancer via promoting cell apoptosis and cell cycle arrest. Also, apatinib displayed the inhibitory effects on cell migration and invasion. Moreover, apatinib strongly suppressed the growth of esophageal cancer xenografts in mice. The effects of apatinib on esophageal cancer were partially dependent on its block of the VEGFR2/Akt/β-catenin pathway. Specifically, apatinib induced the degradation of β-catenin and decreased its transcriptional activity through Akt/GSK-3β repression. Further in vitro and in vivo studies revealed that low dose apatinib had a synergistic antitumor effect with cisplatin on esophageal cancer. Conclusion Our study indicates that apatinib suppresses tumor progression and enhances cisplatin sensitivity in esophageal cancer by deactivating the Akt/β-catenin pathway. These findings provide a theoretical foundation for using apatinib as an effective therapeutic drug for esophageal cancer.
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Affiliation(s)
- Bin Wei
- Department of Oncology, The First Affiliated Hospital with Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029 China.,Department of Oncology, The Affiliated Huaian No.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Yuanyuan Wang
- Department of Oncology, The First Affiliated Hospital with Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029 China
| | - Jiawei Wang
- Department of Oncology, The First Affiliated Hospital with Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029 China
| | - Xiaomin Cai
- Department of Oncology, The First Affiliated Hospital with Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029 China
| | - Lingyan Xu
- Department of Oncology, The First Affiliated Hospital with Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029 China
| | - Jingjing Wu
- Department of Oncology, The Affiliated Huaian No.1 People's Hospital of Nanjing Medical University, Huai'an, China
| | - Ying Wang
- Department of Oncology, The First Affiliated Hospital with Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029 China
| | - Wen Liu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, 210093 China
| | - Yanhong Gu
- Department of Oncology, The First Affiliated Hospital with Nanjing Medical University, 300 Guangzhou Road, Nanjing, 210029 China
| | - Wenjie Guo
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, 210093 China
| | - Qiang Xu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 22 Hankou Road, Nanjing, 210093 China
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13
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Ali M, Shahin SM, Sabri NA, Al-Hendy A, Yang Q. Activation of β-Catenin Signaling and its Crosstalk With Estrogen and Histone Deacetylases in Human Uterine Fibroids. J Clin Endocrinol Metab 2020; 105:5639769. [PMID: 31761932 PMCID: PMC7064306 DOI: 10.1210/clinem/dgz227] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 11/23/2019] [Indexed: 12/23/2022]
Abstract
CONTEXT Uterine fibroids (UF) are the most common benign tumor of the myometrium (MM) in women of reproductive age. However, the mechanism underlying the pathogenesis of UF is largely unknown. OBJECTIVE To explore the link between nuclear β-catenin and UF phenotype and β-catenin crosstalk with estrogen and histone deacetylases (HDACs). DESIGN Protein/RNA levels of β-catenin (CTNNB1 gene), its responsive markers cyclin D1 and c-Myc, androgen receptor (AR), p27, and class-I HDACs were measured in matched UF/MM tissues or cell populations. The effects of chemical inhibition/activation and genetic knockdown of CTNNB1 on UF phenotype were measured. The anti-UF effect of 2 HDAC inhibitors was evaluated. MAIN OUTCOME MEASURE β-catenin nuclear translocation in response to β-catenin inhibition/activation, estrogen, and HDAC inhibitors in UF cells. RESULTS UF tissues/cells showed significantly higher expression of nuclear β-catenin, cyclin D1, c-Myc, and HDACs 1, 2, 3, and 8 than MM. Estradiol induced β-catenin nuclear translocation and consequently its responsive genes in both MM and UF cells, while an estrogen receptor antagonist reversed this induction effect. Treatment with β-catenin or HDAC inhibitors led to dose-dependent growth inhibition, while Wnt3a treatment increased proliferation compared with control. Chemical inhibition of β-catenin decreased cyclin D1 and c-Myc expression levels, while β-catenin activation increased expression of the same markers. Genetic knockdown of CTNNB1 resulted in a marked decrease in β-catenin, cyclin D1, c-Myc, and AR expression. Treatment of UF cells with HDAC inhibitors decreased nuclear β-catenin, cyclin D1, and c-Myc expression. Moreover, HDAC inhibitors induced apoptosis of UF cells and cell cycle arrest. CONCLUSION β-catenin nuclear translocation contributes to UF phenotype, and β-catenin signaling is modulated by estradiol and HDAC activity.
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Affiliation(s)
- Mohamed Ali
- Department of Obstetrics and Gynecology, University of Illinois at Chicago, Chicago, Illinois
- Department of Surgery, University of Illinois at Chicago, Chicago, Illinois
- Clinical Pharmacy Department, Faculty of Pharmacy, ASU, Cairo, Egypt
| | | | - Nagwa Ali Sabri
- Clinical Pharmacy Department, Faculty of Pharmacy, ASU, Cairo, Egypt
| | - Ayman Al-Hendy
- Department of Obstetrics and Gynecology, University of Illinois at Chicago, Chicago, Illinois
- Department of Surgery, University of Illinois at Chicago, Chicago, Illinois
| | - Qiwei Yang
- Department of Obstetrics and Gynecology, University of Illinois at Chicago, Chicago, Illinois
- Department of Surgery, University of Illinois at Chicago, Chicago, Illinois
- Correspondence: Dr Qiwei Yang, 1Department of Obstetrics and Gynecology, University of Illinois at Chicago, 909 S. Wolcott Ave, Chicago, IL 60612, USA. E-mail:
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14
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Vodicka P, Krskova L, Odintsov I, Krizova L, Sedlackova E, Schutzner J, Zamecnik J. Expression of molecules of the Wnt pathway and of E-cadherin in the etiopathogenesis of human thymomas. Oncol Lett 2020; 19:2413-2421. [PMID: 32194741 PMCID: PMC7039126 DOI: 10.3892/ol.2020.11343] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Accepted: 12/10/2019] [Indexed: 01/22/2023] Open
Abstract
The molecular pathogenesis of thymoma remains largely unknown. It has been recently demonstrated, that activation of Wnt signaling pathway leads to increased incidence of thymoma in murine models. The present study investigated the activation of molecules of the Wnt signaling pathway in human thymoma. A total of 112 thymoma cases with complete clinical and follow-up data and 8 controls were included in the present study. Patients with thymoma and controls were examined immunohistochemically for β-catenin and E-cadherin. The mRNA expression levels of CTNNB1, CCND1, MYC, AXIN2 and CDH1 were analyzed by reverse transcription-quantitative PCR. Immunohistochemically, β-catenin and E-cadherin were overexpressed in neoplastic cells of all thymomas. In type A, B1 and non-invasive type B2 thymoma, both molecules were located in the cytoplasm, in contrast to invasive type B2 and B3 thymoma, where membranous immunopositivities were observed. mRNA expression levels of genes involved in the Wnt pathway and of E-cadherin were significantly increased in both type A and B thymoma compared with controls; increasing gradually from type B1 to B3, and with higher stage of disease. In recurrent type B thymoma, the mRNA expression of the molecules was significantly higher. Despite the activation of Wnt pathway in indolent type A thymoma, the negative feedback of the pathway was preserved by overexpression of inhibitory molecule axin2, which was not overexpressed in type B thymoma. In summary, the Wnt pathway was activated in human thymoma and may contribute to oncogenesis. Detection of molecules of the Wnt pathway may be of diagnostic and prognostic value.
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Affiliation(s)
- Prokop Vodicka
- Department of Pathology and Molecular Medicine, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague 150 06, Czech Republic.,First Department of Medicine, First Faculty of Medicine, Charles University and General University Hospital, Prague 128 08, Czech Republic
| | - Lenka Krskova
- Department of Pathology and Molecular Medicine, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague 150 06, Czech Republic
| | - Igor Odintsov
- Department of Pathology and Molecular Medicine, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague 150 06, Czech Republic
| | - Ludmila Krizova
- Department of Oncology, First Faculty of Medicine, Charles University and General University Hospital, Prague 128 08, Czech Republic
| | - Eva Sedlackova
- Department of Oncology, First Faculty of Medicine, Charles University and General University Hospital, Prague 128 08, Czech Republic
| | - Jan Schutzner
- Third Department of Surgery, First Faculty of Medicine, Charles University and Motol University Hospital, Prague 150 06, Czech Republic
| | - Josef Zamecnik
- Department of Pathology and Molecular Medicine, Second Faculty of Medicine, Charles University and Motol University Hospital, Prague 150 06, Czech Republic
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15
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Liu T, Huang JZ, Lei ZY, Yan RS, Fan DL. FoxO3a depletion accelerates cutaneous wound healing by regulating epithelial‑mesenchymal transition through β‑catenin activation. Mol Med Rep 2020; 21:1224-1232. [PMID: 31922245 PMCID: PMC7003051 DOI: 10.3892/mmr.2020.10912] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 11/18/2019] [Indexed: 12/27/2022] Open
Abstract
The hysteresis of keratinocyte (KC) re-epithelialization is an important factor resulting in chronic wounds; however, the molecular mechanisms involved in this cellular response remain yet to be completely elucidated. The present study demonstrated the function of transcription factor Forkhead box O3a (FoxO3a) in KC growth and migration functional effects, resulting in restrained KC re-epithelialization during wound healing. In chronic wound tissue samples, the expression of FoxO3a was significantly increased when compared with the acute wound healing group (P<0.01). Overexpressing FoxO3a significantly inhibited, whereas silencing endogenous FoxO3a enhanced, the growth and migration of HaCaT cells in vitro. Further investigation revealed that FoxO3a negatively regulated matrix metalloproteinases 1 and 9, and increased the expression of tissue inhibitor of metalloproteinase 1. In addition, the upregulation of FoxO3a retarded, whereas the downregulation of FoxO3a accelerated, transforming growth factor-β1-induced epithelial-mesenchymal transition in HaCaT cells. Mechanistically, the overexpression of FoxO3a inactivated β-catenin signaling and markedly reduced the levels of nuclear β-catenin. These results reveal a novel mechanism of FoxO3a in regulating KC re-epithelialization, and provide novel targets for the prevention and treatment of chronic wounds.
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Affiliation(s)
- Ting Liu
- Department of Plastic and Cosmetic Surgery, The Second Affiliated Xinqiao Hospital of Army Medical University, Chongqing 400037, P.R. China
| | - Jing-Zhuo Huang
- Department of Plastic and Cosmetic Surgery, The Second Affiliated Xinqiao Hospital of Army Medical University, Chongqing 400037, P.R. China
| | - Ze-Yuan Lei
- Department of Plastic and Cosmetic Surgery, The Second Affiliated Xinqiao Hospital of Army Medical University, Chongqing 400037, P.R. China
| | - Rong-Shuai Yan
- Department of Plastic and Cosmetic Surgery, The Second Affiliated Xinqiao Hospital of Army Medical University, Chongqing 400037, P.R. China
| | - Dong-Li Fan
- Department of Plastic and Cosmetic Surgery, The Second Affiliated Xinqiao Hospital of Army Medical University, Chongqing 400037, P.R. China
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16
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Qin G, Li Y, Xu X, Wang X, Zhang K, Tang Y, Qiu H, Shi D, Zhang C, Long Q, Lee K, Zhai Q, Wang S, Chen M, Deng W. Panobinostat (LBH589) inhibits Wnt/β-catenin signaling pathway via upregulating APCL expression in breast cancer. Cell Signal 2019; 59:62-75. [PMID: 30880222 DOI: 10.1016/j.cellsig.2019.03.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 03/12/2019] [Accepted: 03/13/2019] [Indexed: 12/26/2022]
Abstract
Breast cancer is the most common malignant disease among women worldwide and the novel therapeutic agents are urgently needed. Panobinostat (LBH589), a pan-HDACs inhibitor, has shown promising anti-tumor effect in recent years. However, the targets of this compound are largely unclear because of its low selectivity. In consideration of the transcription promoting activity of panobinostat, we speculated that specific tumor suppressor genes might be upregulated after panobinostat treatment. In this study, we verified the inhibition effect of panobinostat in different subtypes of breast cancer cells in vivo and in vitro. We found that panobinostat suppressed proliferation, migration as well as invasion, and induced apoptosis in both TNBC and non-TNBC cells. Consistently, panobinostat inhibited breast cancer growth and metastasis in mouse models. Mechanistically, we found APCL transcription and expression was significantly upregulated in panobinostat treated cells by RNA microarray analysis, while knockdown of APCL resulted in reduced sensitivity to panobinostat in breast cancer cells. APCL is a wnt/β-catenin pathway regulator that promotes β-catenin ubiquitylation and degradation. We found that panobinostat inhibited β-catenin expression by increasing its ubiquitylation and thus reducing its half-life. In addition, the expression of β-catenin activated targets including c-Jun, c-Myc, Cyclin D1 and CD44 were also decreased by panobinostat treatment in breast cancer cells. These results suggested that panobinostat inhibited tumor growth and metastasis via upregulating APCL expression in breast cancer cells, which was a novel and crucial mechanism of panobinostat.
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Affiliation(s)
- Ge Qin
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Yizhuo Li
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Xiangdong Xu
- Department of Thyroid & Breast Surgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xin Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Kai Zhang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Yanlai Tang
- Department of Pediatrics, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
| | - Huijuan Qiu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Dingbo Shi
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Changlin Zhang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Qian Long
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Kaping Lee
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Qinglian Zhai
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Shusen Wang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Miao Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
| | - Wuguo Deng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center of Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou, China.
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17
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Kim S, Jeong S. Mutation Hotspots in the β-Catenin Gene: Lessons from the Human Cancer Genome Databases. Mol Cells 2019; 42:8-16. [PMID: 30699286 PMCID: PMC6354055 DOI: 10.14348/molcells.2018.0436] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Revised: 12/26/2018] [Accepted: 12/29/2018] [Indexed: 02/08/2023] Open
Abstract
Mutations in the β-catenin gene (CTNNB1) have been implicated in the pathogenesis of some cancers. The recent development of cancer genome databases has facilitated comprehensive and focused analyses on the mutation status of cancer-related genes. We have used these databases to analyze the CTNNB1 mutations assembled from different tumor types. High incidences of CTNNB1 mutations were detected in endometrial, liver, and colorectal cancers. This finding agrees with the oncogenic role of aberrantly activated β-catenin in epithelial cells. Elevated frequencies of missense mutations were found in the exon 3 of CTNNB1, which is responsible for encoding the regulatory amino acids at the N-terminal region of the protein. In the case of metastatic colorectal cancers, inframe deletions were revealed in the region spanning exon 3. Thus, exon 3 of CTNNB1 can be considered to be a mutation hotspot in these cancers. Since the N-terminal region of the β-catenin protein forms a flexible structure, many questions arise regarding the structural and functional impacts of hotspot mutations. Clinical identification of hotspot mutations could provide the mechanistic basis for an oncogenic role of mutant β-catenin proteins in cancer cells. Furthermore, a systematic understanding of tumor-driving hotspot mutations could open new avenues for precision oncology.
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Affiliation(s)
- Sewoon Kim
- Graduate Department of Bioconvergence Science and Technology, Dankook University, Jukjeon, Yongin, Gyeonggi 16890,
Korea
| | - Sunjoo Jeong
- Graduate Department of Bioconvergence Science and Technology, Dankook University, Jukjeon, Yongin, Gyeonggi 16890,
Korea
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