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Long Z, Li X, Deng W, Tan Y, Liu J. Tumor-associated characteristics and immune dysregulation in nasopharyngeal carcinoma under the regulation of m7G-related tumor microenvironment cells. World J Surg Oncol 2024; 22:166. [PMID: 38918785 PMCID: PMC11202337 DOI: 10.1186/s12957-024-03441-2] [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: 02/02/2024] [Accepted: 06/16/2024] [Indexed: 06/27/2024] Open
Abstract
BACKGROUND Nasopharyngeal carcinoma (NPC) is a type of malignant tumor with high morbidity. Aberrant levels of N7-methylguanosine (m7G) are closely associated with tumor progression. However, the characteristics of the tumor microenvironment (TME) in NPC associated with m7G modification remain unclear. METHODS A total of 68,795 single cells from single-cell RNA sequencing data derived from 11 NPC tumor samples and 3 nasopharyngeal lymphatic hyperplasia (NLH) samples were clustered using a nonnegative matrix factorization algorithm according to 61 m7G RNA modification regulators. RESULTS The m7G regulators were found differential expression in the TME cells of NPC, and most m7G-related immune cell clusters in NPC tissues had a higher abundance compared to non-NPC tissues. Specifically, m7G scores in the CD4+ and CD8+ T cell clusters were significantly lower in NPC than in NLH. T cell clusters differentially expressed immune co-stimulators and co-inhibitors. Macrophage clusters differentially expressed EIF4A1, and high EIF4A1 expression was associated with poor survival in patients with head and neck squamous carcinoma. EIF4A1 was upregulated in NPC tissues compared to the non-NPC tissues and mainly expressed in CD86+ macrophages. Moreover, B cell clusters exhibited tumor biological characteristics under the regulation of m7G-related genes in NPC. The fibroblast clusters interacted with the above immune cell clusters and enriched tumor biological pathways, such as FGER2 signaling pathway. Importantly, there were correlations and interactions through various ligand-receptor links among epithelial cells and m7G-related TME cell clusters. CONCLUSION Our study revealed tumor-associated characteristics and immune dysregulation in the NPC microenvironment under the regulation of m7G-related TME cells. These results demonstrated the underlying regulatory roles of m7G in NPC.
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Affiliation(s)
- Zhen Long
- Department of Otorhinolaryngology Head and Neck Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, No. 26, Yuancun Erheng Road, Tianhe District, Guangzhou City, Guangdong Province, China
- Biomedical Innovation Center, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xiaochen Li
- Department of Otorhinolaryngology Head and Neck Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, No. 26, Yuancun Erheng Road, Tianhe District, Guangzhou City, Guangdong Province, China
- Biomedical Innovation Center, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Wenmin Deng
- Department of Otorhinolaryngology Head and Neck Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, No. 26, Yuancun Erheng Road, Tianhe District, Guangzhou City, Guangdong Province, China
- Biomedical Innovation Center, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Yan Tan
- Department of Otorhinolaryngology Head and Neck Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, No. 26, Yuancun Erheng Road, Tianhe District, Guangzhou City, Guangdong Province, China
- Biomedical Innovation Center, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Jie Liu
- Department of Otorhinolaryngology Head and Neck Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, No. 26, Yuancun Erheng Road, Tianhe District, Guangzhou City, Guangdong Province, China.
- Biomedical Innovation Center, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
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Sun G, Liu F, Lesany M, Nemati S. Comprehensive analysis of recently discovered lncRNA-associated competing endogenous RNA network in nasopharyngeal carcinoma. Pathol Res Pract 2024; 258:155314. [PMID: 38696855 DOI: 10.1016/j.prp.2024.155314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 04/13/2024] [Accepted: 04/16/2024] [Indexed: 05/04/2024]
Abstract
Nasopharyngeal carcinoma (NPC) arises from the epithelium of the nasopharynx and is characterized by geography-dependent incidence. Despite the high mortality rate, specifically in some ethnic groups, the mechanisms underlying NPC pathogenesis are not thoroughly understood and there is an urgent need to detect the potential and clinically applicable biomarkers to ameliorate the overall survival rate and improve the prognosis of patients. In recent years, research has increasingly focused on the importance of long non-coding RNAs (LncRNAs) in cancer progression. LncRNAs play critical roles in regulating gene expression through mechanisms such as competitively binding to microRNAs (CeRNA). While numerous LncRNAs have been studied in nasopharyngeal carcinoma (NPC), their potential as diagnostic and prognostic biomarkers have not been systematically examined. In the present study, we delve into elucidating the biological functions, molecular mechanisms, and clinical significance of newly identified LncRNAs that serve as sponges for different microRNAs in NPC. We highlight their regulatory mechanisms in promoting cell proliferation, invasion, and metastasis, and discuss their implications in diverse cancer-related signaling pathways. Our overall goal is to emboss the fundamental roles of LncRNA-mediated CeRNA networks in NPC progression, which may open up new avenues for determining the pathogenesis of NPC and developing effective prevention and treatment strategies.
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Affiliation(s)
- Guochen Sun
- Otolaryngology Department, Zhejiang Tongde Hospital, Hangzhou, Zhejiang 310000, China.
| | - Feng Liu
- Department of Stomatology, Zhejiang Province, Tongde Hospital, Hangzhou, Zhejiang 310000, China
| | - Maryam Lesany
- Department of Biology, Kavian Institute of Higher Education, Mashhad, Iran
| | - Sara Nemati
- Department of Medical sciences, Ardabil branch, Islamic Azad University, Ardabil, Iran
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Fayyaz F, Eshkiki ZS, Karamzadeh AR, Moradi Z, Kaviani F, Namazi A, Karimi R, Tabaeian SP, Mansouri F, Akbari A. Relationship between long non-coding RNAs and Hippo signaling pathway in gastrointestinal cancers; molecular mechanisms and clinical significance. Heliyon 2024; 10:e23826. [PMID: 38226210 PMCID: PMC10788524 DOI: 10.1016/j.heliyon.2023.e23826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 12/08/2023] [Accepted: 12/13/2023] [Indexed: 01/17/2024] Open
Abstract
Long non-coding RNAs (lncRNAs) play a significant biological role in the regulation of various cellular processes such as cell proliferation, differentiation, apoptosis and migration. In various malignancies, lncRNAs interplay with some main cancer-associated signaling pathways, including the Hippo signaling pathway to regulate the various cellular processes. It has been revealed that the cross-talking between lncRNAs and Hippo signaling pathway involves in gastrointestinal (GI) cancers development and progression. Considering the clinical significance of these lncRNAs, they have also been introduced as potential biomarkers in diagnostic, prognostic and therapeutic strategies in GI cancers. Herein, we review the mechanisms of lncRNA-mediated regulation of Hippo signaling pathway and focus on the corresponding molecular mechanisms and clinical significance of these non-coding RNAs in GI cancers.
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Affiliation(s)
- Farimah Fayyaz
- Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Zahra Shokati Eshkiki
- Alimentary Tract Research Center, Clinical Sciences Research Institute, Imam Khomeini Hospital, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Amir Reza Karamzadeh
- Occupational Medicine Research Center, Iran University of Medical Sciences, Tehran, Iran
- Department of Genetic, Faculty of Sciences, Qom Branch, Islamic Azad University, Qom, Iran
| | - Zahra Moradi
- Department of Genetic, Faculty of Sciences, Qom Branch, Islamic Azad University, Qom, Iran
- Young Researchers and Elite Club, Qom Branch, Islamic Azad University, Qom, Iran
| | - Faezeh Kaviani
- Department of Genetic, Faculty of Sciences, Qom Branch, Islamic Azad University, Qom, Iran
| | - Abolfazl Namazi
- Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran
- Department of Internal Medicine, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Roya Karimi
- Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Seidamir Pasha Tabaeian
- Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran
- Department of Internal Medicine, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Mansouri
- Department of Genetic, Faculty of Sciences, Qom Branch, Islamic Azad University, Qom, Iran
| | - Abolfazl Akbari
- Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran
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Li H, Lan H, Zhang M, Zhao F, An N, Yi C. TEA Domain Transcription Factor 1 Inhibits Ferroptosis and Sorafenib Sensitivity of Hepatocellular Carcinoma Cells. Dig Dis Sci 2023:10.1007/s10620-023-07824-5. [PMID: 36680650 DOI: 10.1007/s10620-023-07824-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 01/04/2023] [Indexed: 01/22/2023]
Abstract
BACKGROUND Ferroptosis, as a unique form of cell death, plays crucial negative roles in tumorigenesis and progression. This study aimed to investigate the role and molecular mechanism of TEA domain transcription factor 1 (TEAD1) in HCC and its effect on sorafenib-induced ferroptosis. METHODS TEAD1 expression was analyzed in HCC tissues using quantitative PCR, and western blot. The effects on cell proliferation, migration and invasion were determined by CCK-8, wound healing and Transwell assays. Intracellular iron, reactive oxygen species (ROS), malondialdehyde (MDA) and GSH measurement was used to assess ferroptosis. Chromatin immunoprecipitation and luciferase reporter gene assays were performed to verify the relationship between TEAD1 and solute carrier family 3 member 2 (SLC3A2). Expression of mTOR, ribosomal protein S6, glutathione peroxidase 4 (GPX4) and SLC3A2 was analyzed by western blot. Tumor xenografts were used assess the effect of TEAD1 on tumor growth in vivo. RESULTS TEAD1 was more abundant in HCC compared with normal tissues. Overexpression of TEAD1 enhanced the proliferation, migration, and invasion of HCC cells, while knockdown of TEAD1 inhibited these cell behaviors. Further, TEAD1 inhibited ferroptosis, which was demonstrated by decreased intracellular Fe2+ content, ROS, and MDA levels, and increased GSH activity. Mechnistically, TEAD1 promotes the transcription of SLC3A2 and activates the mTOR signaling. Additionally, silenced TEAD1 restrained tumor growth and enhance sorafenib-induced antitumor activity in vivo. CONCLUSIONS TEAD1 confers resistance of HCC cells to ferroptosis, thereby promoting the progression of HCC, suggesting the potential value of TEAD1 in the diagnosis and treatment of HCC.
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Affiliation(s)
- Hongmin Li
- Abdominal Oncology Ward, Cancer Center, West China Hospital, Sichuan University, Chengdu, China.,Cancer Center, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China (Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital), Chengdu, China
| | - Haitao Lan
- Cancer Center, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China (Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital), Chengdu, China
| | - Ming Zhang
- Cancer Center, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China (Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital), Chengdu, China
| | - Fen Zhao
- Department of Oncology, Chengdu First People's Hospital, Chengdu, China
| | - Ning An
- Cancer Center, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China (Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital), Chengdu, China
| | - Cheng Yi
- Abdominal Oncology Ward, Cancer Center, West China Hospital, Sichuan University, Chengdu, China.
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Circular RNA hsa_circ_0012673 Promotes Breast Cancer Progression via miR-576-3p/SOX4 Axis. Mol Biotechnol 2023; 65:61-71. [PMID: 35794450 DOI: 10.1007/s12033-022-00524-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 06/14/2022] [Indexed: 01/11/2023]
Abstract
Circular RNAs (circRNAs) have been reported to exert critical roles in human cancers. In this study, we investigated the role and molecular mechanism of hsa_circ_0012673 in breast cancer. Herein, we found that the expression of hsa_circ_0012673 was upregulated in breast cancer tissues and cell lines. Knockdown of hsa_circ_0012673 using RNA interference technique suppressed the proliferation, migration, and invasion of breast cancer cells. Mechanistically, hsa_circ_0012673 sponged miR-576-3p to stabilize SRY-box transcription factor 4 (SOX4), and thereby facilitating breast cancer cell proliferation, migration and invasion. Collectively, our study identified the oncogenic properties of hsa_circ_0012673/miR-576-3p/SOX4 axis in breast cancer, providing potential and exploitable diagnostic and therapeutic molecules for breast cancer.
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Li Y, Xiong JB, Jie ZG, Xiong H. Hydroxyacyl-CoA dehydrogenase trifunctional multienzyme complex subunit beta gene as a tumour suppressor in stomach adenocarcinoma. Front Oncol 2022; 12:1069875. [PMID: 36518312 PMCID: PMC9743170 DOI: 10.3389/fonc.2022.1069875] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 11/04/2022] [Indexed: 08/22/2023] Open
Abstract
BACKGROUND Stomach adenocarcinoma (STAD) is the most common type of gastric cancer. In this study, the functions and potential mechanisms of hydroxyacyl-CoA dehydrogenase trifunctional multienzyme complex subunit beta (HADHB) in STAD were explored. METHODS Different bioinformatics analyses were performed to confirm HADHB expression in STAD. HADHB expression in STAD tissues and cells was also evaluated using western blot, qRT-PCR, and immunohistochemistry. Further, the viability, proliferation, colony formation, cell cycle determination, migration, and wound healing capacity were assessed, and the effects of HADHB on tumour growth, cell apoptosis, and proliferation in nude mice were determined. The upstream effector of HADHB was examined using bioinformatics analysis and dual luciferase reporter assay. GSEA was also employed for pathway enrichment analysis and the expression of Hippo-YAP pathway-related proteins was detected. RESULTS The expression of HADHB was found to be low in STAD tissues and cells. The upregulation of HADHB distinctly repressed the viability, proliferation, colony formation, cell cycle progression, migration, invasion, and wound healing of HGC27 cells, while knockdown of HADHB led to opposite effects. HADHB upregulation impeded tumour growth and cell proliferation, and enhanced apoptosis in nude mice. KLF4, whose expression was low in STAD, was identified as an upstream regulator of HADHB. KLF4 upregulation abolished the HADHB knockdown-induced tumour promoting effects in AGS cells. Further, HADHB regulates the Hippo-YAP pathway, which was validated using a pathway rescue assay. Low expression of KLF4 led to HADHB downregulation in STAD. CONCLUSION HADHB might function as a tumour suppressor gene in STAD by regulation the Hippo-YAP pathway.
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Affiliation(s)
- Yun Li
- Department of Digestive Surgery, Digestive Disease Hospital, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
- Gastrointestinal Surgical Institute of Nanchang University, Nanchang, Jiangxi, China
| | - Jian-Bo Xiong
- Department of Digestive Surgery, Digestive Disease Hospital, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
- Gastrointestinal Surgical Institute of Nanchang University, Nanchang, Jiangxi, China
| | - Zhi-Gang Jie
- Department of Digestive Surgery, Digestive Disease Hospital, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
- Gastrointestinal Surgical Institute of Nanchang University, Nanchang, Jiangxi, China
| | - Hui Xiong
- Department of Digestive Surgery, Digestive Disease Hospital, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
- Gastrointestinal Surgical Institute of Nanchang University, Nanchang, Jiangxi, China
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Exploration of the Simple and Green Synthetic Route of Hollow Titanium Dioxide Microspheres for In-Depth Analysis of Phosphopeptides in the Serum of Nasopharyngeal Carcinoma Patients. Chromatographia 2022. [DOI: 10.1007/s10337-022-04211-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Zhang Y, Wang Y, Ji H, Ding J, Wang K. The interplay between noncoding RNA and YAP/TAZ signaling in cancers: molecular functions and mechanisms. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2022; 41:202. [PMID: 35701841 PMCID: PMC9199231 DOI: 10.1186/s13046-022-02403-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 05/25/2022] [Indexed: 12/13/2022]
Abstract
The Hippo signaling pathway was found coordinately modulates cell regeneration and organ size. Its dysregulation contributes to uncontrolled cell proliferation and malignant transformation. YAP/TAZ are two critical effectors of the Hippo pathway and have been demonstrated essential for the initiation or growth of most tumors. Noncoding RNAs (ncRNAs), including miRNAs, lncRNAs, and circRNAs, have been shown to play critical roles in the development of many cancers. In the past few decades, a growing number of studies have revealed that ncRNAs can directly or indirectly regulate YAP/TAZ signaling. YAP/TAZ also regulate ncRNAs expression in return. This review summarizes the interactions between YAP/TAZ signaling and noncoding RNAs together with their biological functions on cancer progression. We also try to describe the complex feedback loop existing between these components.
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Affiliation(s)
- Yirao Zhang
- Department of Oncology, Second Affiliated Hospital of Nanjing Medical University, Nanjing, 210011, Jiangsu, China
| | - Yang Wang
- Department of Oncology, Second Affiliated Hospital of Nanjing Medical University, Nanjing, 210011, Jiangsu, China
| | - Hao Ji
- Department of Liver Surgery and Liver Transplantation Center, School of Medicine, Renji Hospital, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - Jie Ding
- Department of Oncology, Second Affiliated Hospital of Nanjing Medical University, Nanjing, 210011, Jiangsu, China.
| | - Keming Wang
- Department of Oncology, Second Affiliated Hospital of Nanjing Medical University, Nanjing, 210011, Jiangsu, China.
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She Q, Chen Y, Liu H, Tan J, Li Y. A high level of the long non-coding RNA MCF2L-AS1 is associated with poor prognosis in breast cancer and MCF2L-AS1 activates YAP transcriptional activity to enhance breast cancer proliferation and metastasis. Bioengineered 2022; 13:13437-13451. [PMID: 36700469 PMCID: PMC9276029 DOI: 10.1080/21655979.2022.2074108] [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] [Indexed: 02/01/2023] Open
Abstract
Breast cancer (BC) is one of the most prevalent gynecologic malignant tumors with a poor prognosis and the second leading cause of cancer-related deaths in women worldwide. In recent years, it has been shown that long non-coding RNA (lncRNA) plays an important role in the development of breast cancer (BC). An antisense lncRNA from the MCF2 cell line (MCF2L-AS1) has been discovered recently and has been shown to function in a variety of malignancies. However, its function as a regulator of BC development has yet to be determined. Herein, the bioinformatics study analysis showed that MCF2L-AS1 was frequently highly expressed in BC tumors, and this overexpression was associated with worse patient outcomes. BC cells' proliferation, migration, and invasion are inhibited when MCF2L-AS1 is silenced, whereas the inverse is evident when MCF2L-AS1 is overexpressed. It was also observed that MCF2L-AS1 knockdown decreased carcinogenesis in xenograft tumor models. Furthermore, we discovered that MCF2L-AS1 could bind to and improve the transcription activity of the yes-associated protein (YAP). However, following YAP knockdown, this lncRNA's ability to drive BC malignancy was considerably reduced. In conclusion, MCF2L-AS1 may represent a potential predictive biomarker in BC patients, as well as a key regulator of BC cell proliferation. It works through positive feedback processes involving direct YAP binding and subsequent modulation of intracellular gene expression. Our findings add to our understanding of MCF2L-AS1 regulation and its potential as a therapeutic target in patients with this fatal cancer type.
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Affiliation(s)
- Qing She
- Department of Breast Surgery, Baoji Municipal Central Hospital, Baoji, China
| | - Yuanyuan Chen
- Department of Breast Surgery, Baoji Municipal Central Hospital, Baoji, China
| | - Hong Liu
- Department of Breast Surgery, Baoji Municipal Central Hospital, Baoji, China
| | - Jichao Tan
- Department of Breast Surgery, Baoji Municipal Central Hospital, Baoji, China
| | - Youhuai Li
- Department of Breast Surgery, Baoji Municipal Central Hospital, Baoji, China,CONTACT Youhuai Li Department of Breast Surgery, Baoji Municipal Central Hospital, 8 Jiangtan Road, Weibin District, Baoji, Shaanxi721008, China
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Shen Z, Wu Y, He G. Long non-coding RNA PTPRG-AS1/microRNA-124-3p regulates radiosensitivity of nasopharyngeal carcinoma via the LIM Homeobox 2-dependent Notch pathway through competitive endogenous RNA mechanism. Bioengineered 2022; 13:8208-8225. [PMID: 35300558 PMCID: PMC9161917 DOI: 10.1080/21655979.2022.2037364] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Nasopharyngeal carcinoma (NPC) is a malignant tumor in the nasopharyngeal cavity. LncRNA PTPRG-AS1 is essential in NPC radiosensitivity. This study sought to explore the mechanism of PTPRG-AS1 in NPC radiosensitivity by regulating the miR-124-3p/LHX2 axis. First, NPC-related microarray was analyzed to screen differentially expressed lncRNAs. PTPRG-AS1 and miR-124-3p expression patterns in NPC tissues and adjacent tissues of NPC patients and NPC cell lines were detected by RT-qPCR. PTPRG-AS1 was knocked down in CNE2 and 5–8 F cells by transfection. The radiosensitivity, proliferation and apoptosis before and after radiotherapy (0/6 Gy) were detected by cloning formation assay, CCK-8 assay, and flow cytometry. Bioinformatics, Pearson correlation analysis, RNA pull-down, and luciferase reporter assays were performed to explore the regulatory relationship of the lncRNA PTPRG-AS1/miR-124-3/LHX2 axis. The corresponding functions were verified in the complementation test. The levels of LHX2 and Notch pathway-related proteins were detected by Western blot. PTPRG-AS1 was upregulated in NPC cell lines and tissues. PTPRG-AS1 knockdown decreased NPC cell proliferation and promoted radiotherapy-induced apoptosis and cell radiosensitivity. PTPRG-AS1 upregulated LHX2 as a ceRNA of miR-124-3p. miR-124-3p inhibition partially reversed PTPRG-AS1 silencing-induced NPC cell radiosensitivity. miR-124-3p targeted LHX2. LHX2 overexpression attenuated the miR-124-3p overexpression-induced NPC cell radiosensitivity. LHX2 attenuated NPC cell radiosensitivity by activating the Notch pathway. Briefly, lncRNA PTPRG-AS1 reduced NPC cell radiosensitivity by regulating the miR-124-3p/LHX2 axis through the ceRNA mechanism.
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Affiliation(s)
- Zhangquan Shen
- Department of Otolaryngology, Hangzhou Ninth People's Hospital, Hangzhou, Zhejiang, China
| | - Yang Wu
- Department of Otolaryngology, The Second People's Hospital of Lianyungang City, Lianyungang, Jiangsu, China
| | - Guijun He
- Department of Otolaryngology, The Second People's Hospital of Lianyungang City, Lianyungang, Jiangsu, China
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Lu Z, Peng H, Li R, Xu X, Peng J. BarH-like homeobox 2 represses the transcription of keratin 16 and affects Ras signaling pathway to suppress nasopharyngeal carcinoma progression. Bioengineered 2022; 13:3122-3136. [PMID: 35037835 PMCID: PMC8974228 DOI: 10.1080/21655979.2022.2026549] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Nasopharyngeal carcinoma (NPC) refers to a malignancy initiating from the superior mucosal epithelium of the nasopharynx. Optimal therapies for NPC are still needed. In this investigation, we attempted to explore whether BarH-like homeobox 2 (BARX2), a well-known tumor suppressor, had anti-cancer properties on NPC, and the possible mechanisms. After searching for NPC-related databases, we determined BARX2 as one of the core genes in NPC. The results of RT-qPCR and immunohistochemistry or Western blot demonstrated that BARX2 was reduced in NPC patients and cells. Ectopic expression of BARX2 reverted the malignant phenotype of NPC cells. Mechanistically, BARX2 bound to the keratin 16 (KRT16) promoter to downregulate its expression. In addition, BARX2 was found to reduce the phosphorylation levels of MEK and ERK. Further KRT16 upregulation in cells overexpressing BARX2 promoted malignant aggressiveness of C666-1 and HNE3 cells and activated the Ras signaling pathway. BARX2 inhibited the growth and metastasis of tumors and suppressed the Ras signaling pathway in vivo. In conclusion, our findings indicate that BARX2 reverts malignant phenotypes of NPC cells by downregulating KRT16 in a Ras-dependent fashion. BARX2 might act as a possible therapeutic regulator for NPC.
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Affiliation(s)
- Zhibing Lu
- Department of Oncology, Jiangxi Pingxiang People's Hospital, Pingxiang, P.R. China
| | - Hui Peng
- Department of Oncology, Jiangxi Pingxiang People's Hospital, Pingxiang, P.R. China
| | - Ruijuan Li
- Department of Oncology, Jiangxi Pingxiang People's Hospital, Pingxiang, P.R. China
| | - Xinyan Xu
- Department of Oncology, Jiangxi Pingxiang People's Hospital, Pingxiang, P.R. China
| | - Jiyong Peng
- Department of Oncology, Jiangxi Pingxiang People's Hospital, Pingxiang, P.R. China
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