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Muftuoglu C, Mert U, Akagunduz OO, Tavlayan E, Al-Omar A, Asadi M, Caner A. Profiling of circRNA expressions in radiation-treated head and neck cancer cells and the potential role of circPVT1. Arch Oral Biol 2023; 150:105690. [PMID: 37027893 DOI: 10.1016/j.archoralbio.2023.105690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 03/20/2023] [Accepted: 03/26/2023] [Indexed: 03/30/2023]
Abstract
OBJECTIVE Radiotherapy is an indispensable treatment modality for head and neck cancers (HNCs). Due to their stable structure, circular RNAs (circRNA) have been implicated as potential biomarkers for clinical use in cancers. The purpose of this study was profiling the circRNA in radiation-treated head and neck cancer cells to identify potential differentially expressed circRNAs. DESIGN The effects of radiation on the expression level of circRNAs were investigated in HNCs cells, compared to healthy cell lines. To predict the potential role of circRNAs in HNC patients, tissue expression levels, survival analyses of circRNAs, and circRNA-miRNA network were evaluated using TCGA/CPTAC datasets. Based on expression level in irradiated cells, circPVT1 (plasmacytoma variant translocation 1) was further investigated by sequence analysis. RESULTS The study revealed the characterization of differentially expressed circRNAs in cancer cells and that irradiation made significant changes in the expression of circRNAs. These findings suggest that certain circRNAs, especially circPVT1, may be potential biomarkers to monitor radiotherapy effects in patients with HNCs. CONCLUSIONS CircRNAs may be promising molecules for improving and understanding radiotherapy efficacy in HNCs.
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Affiliation(s)
- Can Muftuoglu
- Institute of Health Sciences, Department of Basic Oncology, Ege University, Izmir, Turkey; Translational Pulmonary Research Center (EGESAM), Ege University, Izmir, Turkey
| | - Ufuk Mert
- Institute of Health Sciences, Department of Basic Oncology, Ege University, Izmir, Turkey; Translational Pulmonary Research Center (EGESAM), Ege University, Izmir, Turkey; Atatürk Health Care Vocational School, Ege University, Izmir, Turkey
| | | | - Emin Tavlayan
- Department of Radiation Oncology, Faculty of Medicine, Ege University, Izmir, Turkey
| | - Ahmed Al-Omar
- Institute of Health Sciences, Department of Basic Oncology, Ege University, Izmir, Turkey
| | - Milad Asadi
- Institute of Health Sciences, Department of Basic Oncology, Ege University, Izmir, Turkey
| | - Ayse Caner
- Institute of Health Sciences, Department of Basic Oncology, Ege University, Izmir, Turkey; Translational Pulmonary Research Center (EGESAM), Ege University, Izmir, Turkey; Department of Parasitology, Faculty of Medicine, Ege University, Izmir, Turkey.
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Li M, Luo M, Liu P, Wang R, Jing H. Circ_0001402 knockdown suppresses the chemoresistance and development of DDP-resistant cutaneous squamous cell carcinoma cells by functioning as a ceRNA for miR-625-5p. Exp Dermatol 2023; 32:529-541. [PMID: 36635223 DOI: 10.1111/exd.14745] [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: 03/22/2022] [Revised: 01/05/2023] [Accepted: 01/09/2023] [Indexed: 01/14/2023]
Abstract
Cutaneous squamous cell carcinoma (CSCC) is the most common metastatic skin cancer. Circular RNAs (circRNAs) are differentially expressed in CSCC and can sequester and sponge microRNAs. GSE74758 shows that hsa_circ_0001402 (circ_0001402) is the most overexpressed circRNA in CSCC. Expression of circ_0001402, microRNA(miR)-625-5p and karyopherin subunit alpha 4 (KPNA4) was detected by quantitative real-time polymerase chain reaction and/or Western blot. Colon formation, flow cytometry, Transwell assays and xenograft tumour model confirmed the development of CSCC cells. The competing endogenous RNA (ceRNA) interaction was confirmed by dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay. Circ_0001402 was significantly upregulated in CSCC tissues and cells, and higher expression of circ_0001402 was found in DDP-resistant samples. Functionally, circ_0001402 knockdown induced apoptosis and inhibited half maximal inhibitory concentration of DDP, colony formation, migration and invasion of DDP-resistant CSCC cells, accompanied with the depressed multi-drug resistance-1 (MDR1) and MDR-related protein-1, while miR-625-5p inhibitor could counteract these effects. Mechanically, circ_0001402 mediated the expression regulation of KPNA4 via functioning as a ceRNA for miR-625-5p. KPNA4 re-expression could abate the functions of miR-625-5p. Furthermore, circ_0001402 knockdown could hinder tumour growth of DDP-resistant CSCC. Circ_0001402 knockdown can suppress the development and chemoresistance of DDP-resistant CSCC cells at least partly through targeting miR-625-5p/KPNA4 axis.
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Affiliation(s)
- Min Li
- Department of Dematology, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Ming Luo
- Department of Oncology, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Pei Liu
- Department of Dematology, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Runchao Wang
- Department of Dematology, Taihe Hospital, Hubei University of Medicine, Shiyan, China
| | - Haixia Jing
- Department of Dematology, Taihe Hospital, Hubei University of Medicine, Shiyan, China
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3
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Yin D, Wei G, Sun X, Yin Y. Knockdown of circRNA circEBF1 inhibits cutaneous squamous cell carcinoma progression by regulating the miR-1247-5p/CSF3 axis. Histol Histopathol 2022; 37:985-997. [PMID: 35543246 DOI: 10.14670/hh-18-468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
BACKGROUND Cutaneous squamous cell carcinoma (CSCC) is one of the causes of cancer-related death worldwide. Circular RNAs (circRNAs) play a vital role in the pathological process of many malignant tumors. This study aimed to explore the specific role and potential mechanism of circRNA EBF transcription factor 1 (circEBF1) in CSCC. METHODS The levels of circEBF1, microRNA-1247-5p (miR-1247-5p) and colony stimulating factor 3 (CSF3) were determined by quantitative real-time PCR and Western blot. Cell proliferation was assessed by colony formation assay. Cell migration, invasion and apoptosis were evaluated by Transwell, wound healing, flow cytometry and Western blot assays. Cellular glycolysis, including glucose consumption, lactate production, and ATP level, was detected by commercial kits. The binding relationship between miR-1247-5p and circEBF1 or CSF3 was verified by dual-luciferase reporter assay, RNA immunoprecipitation (RIP) assay and RNA pull-down assay. Xenograft experiment was conducted to analyze tumor growth in vivo. RESULTS circEBF1 and CSF3 were up-regulated, while miR-1247-5p was down-regulated in CSCC tissues and cells. Interference of circEBF1 hindered the proliferation, migration, invasion, and glycolysis of CSCC cells and promoted apoptosis. In addition, circEBF1 sponged miR-1247-5p to regulate CSCC cell development. Also, miR-1247-5p suppressed CSCC cell progression by inhibiting CSF3. Moreover, depletion of circEBF1 blocked CSCC tumor growth in vivo. CONCLUSION Down-regulation of circEBF1 impeded CSCC progression by regulating the miR-1247-5p/CSF3 pathway, suggesting that circEBF1 might be a promising therapeutic target for CSCC.
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Affiliation(s)
- Dong Yin
- Department of Dermatology, Shanxi Provincial People's Hospital, Xi'an City, Shaanxi Province, China.
| | - Guo Wei
- Department of Dermatology, The Second Hospital of Shandong University, Jinan City, Shandong Province, China
| | - Xiaoyan Sun
- Department of Dermatology, Shanxi Provincial People's Hospital, Xi'an City, Shaanxi Province, China
| | - Yan Yin
- Department of Gastroenterology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an City, Shaanxi Province, China
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Liu F, Li S. Non-coding RNAs in skin cancers:Biological roles and molecular mechanisms. Front Pharmacol 2022; 13:934396. [PMID: 36034860 PMCID: PMC9399465 DOI: 10.3389/fphar.2022.934396] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 07/11/2022] [Indexed: 11/13/2022] Open
Abstract
Cutaneous malignancies, including basal cell carcinoma, cutaneous squamous cell carcinoma, and cutaneous melanoma, are common human tumors. The incidence of cutaneous malignancies is increasing worldwide, and the leading cause of death is malignant invasion and metastasis. The molecular biology of oncogenes has drawn researchers’ attention because of the potential for targeted therapies. Noncoding RNAs, including microRNAs, long noncoding RNAs, and circular RNAs, have been studied extensively in recent years. This review summarizes the aspects of noncoding RNAs related to the metastasis mechanism of skin malignancies. Continuous research may facilitate the identification of new therapeutic targets and help elucidate the mechanism of tumor metastasis, thus providing new opportunities to improve the survival rate of patients with skin malignancies.
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Circ_0001821 contributes to the development of cutaneous squamous cell carcinoma by regulating miR-148a-3p/EGFR axis and activating PI3K/Akt pathway. Mol Cell Biol 2022; 42:e0008921. [PMID: 35191745 DOI: 10.1128/mcb.00089-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background: Circular RNAs (circRNAs) are implicated in diverse human cancers. However, the effects of circRNAs on cutaneous squamous cell carcinoma (CSCC) are barely known. we focused on the function of circ_0001821 in CSCC. Methods: QRT-PCR assay was performed for the expression of circ_0001821, miR-148a-3p and epidermal growth factor receptor (EGFR). Cell Counting Kit-8 (CCK-8) assay and colony formation assay were conducted to evaluate cell viability and colony formation ability. Flow cytometry analysis was adopted to analyze cell cycle and apoptosis. Transwell assay was employed to detect cell motility. Dual-luciferase reporter assay, RIP assay and RNA pull-down assay were utilized to verify the interaction between miR-148a-3p and circ_0001821 or EGFR. Western blot assay was conducted for protein levels. Murine xenograft model assay was used to explore the function of circ_0001821 in vivo. Results: Circ_0001821 level was increased in CSCC tissues and cells. Circ_0001821 knockdown restrained cell viability, colony formation, cell cycle process and metastasis and facilitated cell apoptosis in vitro and restrained tumor growth in vivo. For mechanism analysis, circ_0001821 directly targeted miR-148a-3p to elevate EGFR expression. Downregulation of miR-148a-3p weakened the impacts of circ_0001821 deficiency on CSCC malignant phenotypes. Moreover, miR-148a-3p overexpression inhibited the malignant phenotypes of CSCC cells, with EGFR elevation abrogated the effects. In addition, circ_0001821 knockdown blocked the activation of PI3K/Akt pathway. Conclusion: Circ_0001821 functioned as a tumor promotor in CSCC via regulating miR-148a-3p/EGFR axis and PI3K/Akt pathway.
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Ghafouri-Fard S, Khoshbakht T, Taheri M, Jamali E. A Concise Review on the Role of CircPVT1 in Tumorigenesis, Drug Sensitivity, and Cancer Prognosis. Front Oncol 2021; 11:762960. [PMID: 34804965 PMCID: PMC8599443 DOI: 10.3389/fonc.2021.762960] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 10/15/2021] [Indexed: 12/16/2022] Open
Abstract
CircPVT1 (hsa_circ_0001821) is a cancer-related circular RNA (circRNA) that originated from a genomic locus on chromosome 8q24. This locus has been previously found to encode the oncogenic long non-coding RNA PVT1. Expression of this circRNA has been found to be upregulated in diverse neoplastic conditions. CircPVT1 acts as a sponge for miR-125a, miR-125b, miR-124-3p, miR-30a-5p, miR-205-5p, miR-423-5p, miR-526b, miR-137, miR-145-5p, miR-497, miR-30d/e, miR-455-5p, miR-29a-3p, miR-204-5p, miR-149, miR-106a-5p, miR-377, miR-3666, miR-203, and miR-199a-5p. Moreover, it can regulate the activities of PI3K/AKT, Wnt5a/Ror2, E2F2, and HIF-1α. Upregulation of circPVT1 has been correlated with decreased survival of patients with different cancer types. In the current review, we explain the oncogenic impact of circPVT1 in different tissues based on evidence from in vitro, in vivo, and clinical investigations.
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Affiliation(s)
- Soudeh Ghafouri-Fard
- Department of Medical Genetics, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Tayyebeh Khoshbakht
- Phytochemistry Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Taheri
- Urology and Nephrology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Institute of Human Genetics, Jena University Hospital, Jena, Germany
| | - Elena Jamali
- Skull Base Research Center, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Department of Pathology, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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7
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Li L, Khan S, Li S, Wang S, Wang F. Noncoding RNAs: emerging players in skin cancers pathogenesis. Am J Cancer Res 2021; 11:5591-5608. [PMID: 34873482 PMCID: PMC8640824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Accepted: 09/08/2021] [Indexed: 06/13/2023] Open
Abstract
Skin malignancies form in tissues of the skin and are the most frequent cancers in the world, with an increasing incidence and a steady fatality rate. They are classified as melanoma or nonmelanoma cancers, which include basal cell carcinoma and squamous cell carcinoma. Noncoding RNA transcripts have received increased attention after the thorough analysis of the human genome revealed that most of the genomic components are not encoded to protein. MicroRNAs, long noncoding RNAs, and circular RNAs are some of the well-studied types of these noncoding regions. The alteration in any of these members' expression is associated intrinsically with human cancers, including skin malignancies, due to their critical functions in cell processes for normal development. As a result, investigating the noncoding component of the transcriptome opens up the possibility of discovering new therapeutic and diagnostic targets. This review discusses current studies on the involvement of microRNAs, long noncoding RNAs, and circular RNAs in the pathogenesis of human skin cancers.
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Affiliation(s)
- Lin Li
- Department of Dermatology, The Affiliated Children’s Hospital of Zhengzhou UniversityZhengzhou 450053, Henan, China
| | - Suliman Khan
- Department of Cerebrovascular Diseases, The Second Affiliated Hospital of Zhengzhou UniversityZhengzhou 450014, Henan, China
- Department of Medical Lab Technology, The University of HaripurPakistan
| | - Song Li
- Department of Dermatology, The Affiliated Children’s Hospital of Zhengzhou UniversityZhengzhou 450053, Henan, China
| | - Shengchun Wang
- Department of Dermatology, The Affiliated Children’s Hospital of Zhengzhou UniversityZhengzhou 450053, Henan, China
| | - Fang Wang
- Department of Dermatology, The Affiliated Children’s Hospital of Zhengzhou UniversityZhengzhou 450053, Henan, China
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8
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Non-coding RNA dysregulation in skin cancers. Essays Biochem 2021; 65:641-655. [PMID: 34414406 DOI: 10.1042/ebc20200048] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 07/16/2021] [Accepted: 08/04/2021] [Indexed: 02/07/2023]
Abstract
Skin cancers are the most common cancers worldwide. They can be classified in melanoma and non-melanoma skin cancer (NMSC), the latter includes squamous cell carcinoma (SCC), basal cell carcinoma (BCC) and merkel cell carcinoma (MCC). In recent years, the crucial role of non-coding RNAs (ncRNAs) in skin cancer pathogenesis has become increasingly evident. NcRNAs are functional RNA molecules that lack any protein-coding activity. These ncRNAs are classified based on their length: small, medium-size, and long ncRNAs. Among the most studied ncRNAs there are microRNAs (miRNAs), long non-coding RNAs (lncRNAs), and circular RNA (circRNAs). ncRNAs have the ability to regulate gene expression at transcriptional and post-transcriptional levels and are involved in skin cancer cell proliferation, angiogenesis, invasion, and metastasis. Many ncRNAs exhibit tissue- or cell-specific expression while others have been correlated to tumor staging, drug resistance, and prognosis. For these reasons, ncRNAs have both a diagnostic and prognostic significance in skin cancers. Our review summarizes the functional role of ncRNAs in skin cancers and their potential clinical application as biomarkers.
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Wei Y, Yang X, Gao L, Yang J, Zheng L, Gao L, Zhou X, Xiang X, Zhang J, Yi C. Identification of potential immune-related circRNA-miRNA-mRNA regulatory network in cutaneous squamous cell carcinoma. Am J Cancer Res 2021; 11:4826-4843. [PMID: 34765295 PMCID: PMC8569358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 09/21/2021] [Indexed: 06/13/2023] Open
Abstract
Circulating RNAs (circRNAs) are involved in tumor development and progression by participating in immune regulation. Nevertheless, the circRNAs expression profiles and their roles on the immunomodulatory effects in cutaneous squamous cell carcinoma (cSCC) have rarely been studied. In our study, we identified the differentially expressed circRNAs (DEcircRNAs), miRNAs (DEmiRNAs), mRNAs (DEmRNAs) in cSCC and established the circRNA competing endogenous RNAs (ceRNAs) network. Subsequently, the hub differentially expressed immune-related genes were identified and validated by immunochemistry as well as the GO and KEGG pathway analysis were performed. 54 differentially expressed circRNAs were identified and hub differentially expressed immune-related genes were identified and they were mostly associated with immune response in the progression of cSCC. Our results indicated that the potential immune-related circRNA-miRNA-mRNA network may assist in understanding the molecular mechanisms underlying the carcinogenesis and progression in cSCC. Moreover, the immune-related genes may provide an insight into the pathogenesis, molecular biomarkers, and potential therapeutic targets for cSCC patients.
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Affiliation(s)
- Yuanfeng Wei
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan UniversityChengdu 610041, Sichuan, China
| | - Xi Yang
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan UniversityChengdu 610041, Sichuan, China
| | - Limin Gao
- Department of Pathology, West China Hospital, Sichuan UniversityChengdu 610041, Sichuan, China
| | - Ju Yang
- Department of Pathophysiology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan UniversityChengdu 610041, Sichuan, China
| | - Lingnan Zheng
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan UniversityChengdu 610041, Sichuan, China
| | - Ling Gao
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan UniversityChengdu 610041, Sichuan, China
| | - Xiaohan Zhou
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan UniversityChengdu 610041, Sichuan, China
| | - Xiaoyu Xiang
- Department of Pathology, West China Hospital, Sichuan UniversityChengdu 610041, Sichuan, China
| | - Jie Zhang
- Lab of Experimental Oncology, State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University and Collaborative Innovation CenterChengdu 610041, Sichuan, China
| | - Cheng Yi
- Department of Medical Oncology, Cancer Center, West China Hospital, Sichuan UniversityChengdu 610041, Sichuan, China
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10
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Liu L, Zhang F, Li J. CircRNA circ_0001821 predicts an unfavorable prognosis and promotes the proliferation of multiple myeloma. ACTA ACUST UNITED AC 2021; 26:716-723. [PMID: 34555307 DOI: 10.1080/16078454.2021.1974199] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND A previous study reported circ_0001821 serves as a new diagnostic biomarker in lung and gastric cancer. However, whether circ_0001821 associates with the development of multiple myeloma is still unclear. OBJECTIVE To investigate the clinical significance and biological function of circ_0001821 in human multiple myeloma. METHODS The expression of circ_0001821 in bone marrow tissues and cell lines of multiple myeloma was detected by quantitative real-time PCR. The relationship between circ_0001821 expression and clinicopathological characteristics in multiple myeloma patients was determined by the Chi-square test. MTT, Western blotting analysis and flow cytometry were performed to evaluate the impact of circ_0001821 on cell proliferation and apoptosis. RESULTS Circ_0001821 expression was increased in bone marrow tissues and cell lines from multiple myeloma compared with that in normal controls, and its expression was related to hemoglobin, bone injury, β2-MG, and globulin. In multiple myeloma patients aged ≥60 years, high circ_0001821 expression displayed lower overall survival (OS) rate compared with low circ_0001821 expression. High circ_0001821 expression was an independent prognostic indicator for the poor OS. Furthermore, the expression of Caspase-3 protein was lower in patients with high circ_0001821 expression than that in those patients with low circ_0001821expression. Overexpression of circ_0001821 led to increased proliferation and arrested apoptosis of multiple myeloma cells, while knockdown of circ_0001821 had the opposite effects. CONCLUSION High expression of circ_0001821 associated with aggressive pathological indicators and predicted a poor prognosis in multiple myeloma. Circ_0001821 played an oncogenic role in multiple myeloma by modulating cell proliferation and apoptosis.
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Affiliation(s)
- Lin Liu
- Graduate School, Jinan University, Jinan, People's Republic of China.,Department of Hematology, the First Affiliated Hospital of Bengbu Medical College, Bengbu, People's Republic of China
| | - Feng Zhang
- Department of Hematology, the First Affiliated Hospital of Bengbu Medical College, Bengbu, People's Republic of China
| | - Jiajia Li
- Department of Hematology, the First Affiliated Hospital of Bengbu Medical College, Bengbu, People's Republic of China
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Meyer T, Sand M, Schmitz L, Stockfleth E. The Role of Circular RNAs in Keratinocyte Carcinomas. Cancers (Basel) 2021; 13:cancers13164240. [PMID: 34439394 PMCID: PMC8392367 DOI: 10.3390/cancers13164240] [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: 07/29/2021] [Revised: 08/18/2021] [Accepted: 08/18/2021] [Indexed: 12/19/2022] Open
Abstract
Keratinocyte carcinomas (KC) include basal cell carcinomas (BCC) and cutaneous squamous cell carcinomas (cSCC) and represents the most common cancer in Europe and North America. Both entities are characterized by a very high mutational burden, mainly UV signature mutations. Predominately mutated genes in BCC belong to the sonic hedgehog pathway, whereas, in cSCC, TP53, CDKN2A, NOTCH1/2 and others are most frequently mutated. In addition, the dysregulation of factors associated with epithelial to mesenchymal transition (EMT) was shown in invasive cSCC. The expression of factors associated with tumorigenesis can be controlled in several ways and include non-coding RNA molecules, such as micro RNAs (miRNA) long noncoding RNAs (lncRNA) and circular RNAs (circRNA). To update findings on circRNA in KC, we reviewed 13 papers published since 2016, identified in a PubMed search. In both BCC and cSCC, numerous circRNAs were identified that were differently expressed compared to healthy skin. Some of them were shown to target miRNAs that are also dysregulated in KC. Moreover, some studies confirmed the biological functions of individual circRNAs involved in cancer development. Thus, circRNAs may be used as biomarkers of disease and disease progression and represent potential targets of new therapeutic approaches for KC.
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Affiliation(s)
- Thomas Meyer
- Department of Dermatology St. Josef Hospital, Ruhr-University Bochum, Gudrunstr. 56, 44791 Bochum, Germany;
- Correspondence: ; Tel.: +49-234-5096014
| | - Michael Sand
- Department of Plastic and Reconstructive Surgery, St. Josef-Hospital, Heidbergweg 22–24, 45257 Essen, Germany;
| | - Lutz Schmitz
- Institute of Dermatopathology, MVZ Corius DermPath Bonn, GmbH, Trierer Strasse 70–72, 53115 Bonn, Germany;
| | - Eggert Stockfleth
- Department of Dermatology St. Josef Hospital, Ruhr-University Bochum, Gudrunstr. 56, 44791 Bochum, Germany;
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12
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Cai L, Wang Y, Wu J, Wu G. Hsa_circ_0008234 facilitates proliferation of cutaneous squamous cell carcinoma through targeting miR-127-5p to regulate ADCY7. Arch Dermatol Res 2021; 314:541-551. [PMID: 34143288 DOI: 10.1007/s00403-021-02261-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 04/28/2021] [Accepted: 06/11/2021] [Indexed: 12/11/2022]
Abstract
Cutaneous squamous cell carcinoma (cSCC) is the second most common skin malignant tumor with 25-50% of 5-year survival. There exist urgent needs for the identification of novel biomarkers for the diagnostic and therapeutic strategies of cSCC. The differentially expressed circRNAs in cSCC tissues and non-lesional skin tissues were obtained through analyzing the circular RNAs (circRNAs) microarray dataset GSE74758. The expression pattern of the indicated circRNAs in cSCC tissues was confirmed by qRT-PCR. FISH analysis was used to detect the location of hsa_circ_0008234 in cells. RIP experiment was used to detect the interaction between hsa_circ_0008234 and miR-127-5p. CCK-8 analysis and colony formation assay were used to detect the proliferation of cSCC cells. qRT-PCR and western blot were adopted to detect the expression of ACDY7. Three differential expressed circRNAs were obtained from the microarray data (GSE74758), and hsa_circ_0008234 was confirmed to be highly expressed in cSCC tissues by qRT-PCR. Hsa_circ_0008234 was mainly located in cytoplasm and stable in cSCC cells. RIP experiment revealed that hsa_circ_0008234 directly interacts with miR-127-5p in cSCC cells. Hsa_circ_0008234 increased the cell viability and colony formation of cSCC cells through acting as the sponge of miR-127-5p. MiR-127-5p inhibited the expression of ADCY7 in cSCC cells through binding the 3'UTR of ADCY7. Hsa_circ_0008234 was positively associated with ADCY7 expression in cSCC tissues. Hsa_circ_0008234 facilitates the proliferation of cSCC through targeting miR-127-5p to regulate ADCY7 expression and has the potential to be a novel therapeutic target for cSCC.
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Affiliation(s)
- Li Cai
- Department of Dermatology and Venereology, Hebei Provincial People' Hospital, Shijiazhuang, Hebei, 050011, P. R. China
| | - Yongqiang Wang
- Department of Dermatology and Venereology, Hebei Provincial People' Hospital, Shijiazhuang, Hebei, 050011, P. R. China
| | - Jian Wu
- Department of Dermatology and Venereology, Hebei Provincial People' Hospital, Shijiazhuang, Hebei, 050011, P. R. China
| | - Ganxun Wu
- Department of Otorhinolaryngology Head and Neck Surgery, The Fourth Hospital of Hebei Medical University, Shijiazhuang, Hebei, 050017, P. R. China.
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Zhang Z, Guo H, Yang W, Li J. Exosomal Circular RNA RNA-seq Profiling and the Carcinogenic Role of Exosomal circ-CYP24A1 in Cutaneous Squamous Cell Carcinoma. Front Med (Lausanne) 2021; 8:675842. [PMID: 34109199 PMCID: PMC8180850 DOI: 10.3389/fmed.2021.675842] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 04/29/2021] [Indexed: 12/15/2022] Open
Abstract
Objective: Aberrantly expressed exosomal circular RNAs (circRNAs) have been reported in various human cancers. Nevertheless, it remains elusive in cutaneous squamous cell carcinoma (cSCC). Herein, based on RNA-seq, we systematically uncovered the expression and implication of exosomal circRNAs in cSCC. Methods: Plasma exosomes derived from cSCC and healthy subjects were characterized by nanoparticle tracking analysis (NTA), transmission electron microscopy (TEM), and western blot. Differentially expressed exosomal circular RNAs (circRNAs) were screened by RNA-seq analysis, which were validated by RT-qPCR. Among them, the biological structure of circ-CYP24A1 was validated by Sanger sequencing and RNase R digestion. Si-circ-CYP24A1 was transfected into exosomes, followed by incubation with A431 and SCL-1 cells. Then, viability, apoptosis, migration, and invasion were evaluated by CCK-8, TUNEL staining and migration assays. Results: This study identified 25 up- and 76 down-regulated exosomal circRNAs in cSCC than healthy subjects. Among them, circulating circ-CYP24A1 was confirmed to be up-regulated in cSCC. Circ-CYP24A1 had a covalently closed circular structure and was not sensitive to RNase R digestion. After incubation with si-circ-CYP24A1-transfected exosomes, proliferation, migration, and invasion were lowered while apoptosis was enhanced in A431 and SCL-1 cells. Meanwhile, si-circ-CYP24A1-transfected exosomes significantly decreased the expression of downstream targets CDS2, MAVS, and SOGA in cSCC cells. Conclusion: Collectively, our study identified that targeting exosomal circ-CYP24A1 could suppress cSCC progression by weakening tumor malignant behaviors, which might provide a promising therapeutic target and non-invasive diagnostic biomarker for cSCC.
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Affiliation(s)
- Zheng Zhang
- Department of Dermatology, Key Laboratory of Immunodermatology, The First Hospital of China Medical University, Shenyang, China
| | - Hao Guo
- Department of Dermatology, Key Laboratory of Immunodermatology, The First Hospital of China Medical University, Shenyang, China
| | - Wenjia Yang
- Department of Dermatology, Key Laboratory of Immunodermatology, The First Hospital of China Medical University, Shenyang, China
| | - Jiuhong Li
- Department of Dermatology, Key Laboratory of Immunodermatology, The First Hospital of China Medical University, Shenyang, China
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