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Yang M, Yu T, Han L. Hsa_circ_0010882 facilitates hepatocellular carcinoma progression by modulating M1/M2 macrophage polarization. J Viral Hepat 2024; 31:189-196. [PMID: 38235909 DOI: 10.1111/jvh.13917] [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: 07/27/2023] [Revised: 12/12/2023] [Accepted: 12/30/2023] [Indexed: 01/19/2024]
Abstract
Hepatocellular carcinoma (HCC) is one common malignant tumour with a high immunosuppressive tumour microenvironment and poor outcomes. This study investigated the influence of hsa_circ_0010882 on M1/M2 macrophage polarization in the progression of HCC. A total of 125 paired tissue specimens from HCC patients who underwent hepatectomy were collected. M1 and M2 phenotypes macrophages were induced using THP-1. After co-cultured with macrophages and transfected HCC cells, the viability, migration and invasion of HCC cells were detected by cellular experiments. Bioinformatic databases and dual-luciferase reporter assays were used to predict and validate the interaction between circ_0010882 and miR-382. Expression of circ_0010882 was increased in HCC tissues and associated with shorter overall survival outcomes. The mRNA expression of M2 macrophage markers Arg-1, CD163 and CD206 were elevated in HCC tissues. Interfering with circ_0010882 increased M1-type macrophage markers (TNF-α and iNOS) while decreasing M2-type macrophage markers (Arg-1 and CD206). Silencing of circ_0010882 strengthened the capacity of M1 macrophages to suppress HCC cell viability, migration capacities and invasion potential while reducing the ability of M2 macrophages to promote above cellular abilities. MiR-382 was a direct target miRNA of circ_0010882. The circ_0010882 expression was increased in HCC tissues and associated with poor prognosis of HCC patients. Silencing of circ_0010882 inhibits macrophage M2 polarization in HCC progression by regulating miR-382 expression. Circ_0010882 may serve as a biomarker to provide novel strategies for the treatment of HCC and patient rehabilitation, thereby improving the prognosis of patients.
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Affiliation(s)
- Ming Yang
- Department of Medical Oncology, The Affiliated Xuzhou Municipal Hospital of Xuzhou Medical University, Xuzhou, China
| | - Tao Yu
- Department of Medical Oncology, The Affiliated Xuzhou Municipal Hospital of Xuzhou Medical University, Xuzhou, China
| | - Li Han
- Department of Medical Oncology, The Affiliated Xuzhou Municipal Hospital of Xuzhou Medical University, Xuzhou, China
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2
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Ding P, Liu P, Wu H, Yang P, Tian Y, Zhao Q. Functional properties of circular RNAs and research progress in gastric cancer. Front Oncol 2022; 12:954637. [DOI: 10.3389/fonc.2022.954637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 10/24/2022] [Indexed: 11/18/2022] Open
Abstract
Circular RNAs (circRNAs) are a class of closed circular non-coding RNAs widely exist in eukaryotes, with high stability and species conservation. A large number of studies have shown that circRNAs are abnormally expressed in various tumor tissues, and are abundant in plasma with long half-life and high specificity, which may be served as potential tumor biomarkers for early diagnosis, treatment and prognosis of malignant tumors. However, the role of circRNAs is still poorly understood in gastric cancer. This article reviews the research progress of circRNAs in gastric cancer in recent years so as to explore the relationship between circRNAs and the occurrence and the development of gastric cancer, and provide new ideas for the diagnosis and treatment of gastric cancer.
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Long Noncoding RNAs and Circular RNAs Regulate AKT and Its Effectors to Control Cell Functions of Cancer Cells. Cells 2022; 11:cells11192940. [PMID: 36230902 PMCID: PMC9563963 DOI: 10.3390/cells11192940] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2022] [Revised: 09/06/2022] [Accepted: 09/17/2022] [Indexed: 11/29/2022] Open
Abstract
AKT serine-threonine kinase (AKT) and its effectors are essential for maintaining cell proliferation, apoptosis, autophagy, endoplasmic reticulum (ER) stress, mitochondrial morphogenesis (fission/fusion), ferroptosis, necroptosis, DNA damage response (damage and repair), senescence, and migration of cancer cells. Several lncRNAs and circRNAs also regulate the expression of these functions by numerous pathways. However, the impact on cell functions by lncRNAs and circRNAs regulating AKT and its effectors is poorly understood. This review provides comprehensive information about the relationship of lncRNAs and circRNAs with AKT on the cell functions of cancer cells. the roles of several lncRNAs and circRNAs acting on AKT effectors, such as FOXO, mTORC1/2, S6K1/2, 4EBP1, SREBP, and HIF are explored. To further validate the relationship between AKT, AKT effectors, lncRNAs, and circRNAs, more predicted AKT- and AKT effector-targeting lncRNAs and circRNAs were retrieved from the LncTarD and circBase databases. Consistently, using an in-depth literature survey, these AKT- and AKT effector-targeting database lncRNAs and circRNAs were related to cell functions. Therefore, some lncRNAs and circRNAs can regulate several cell functions through modulating AKT and AKT effectors. This review provides insights into a comprehensive network of AKT and AKT effectors connecting to lncRNAs and circRNAs in the regulation of cancer cell functions.
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Xue C, Li G, Lu J, Li L. Crosstalk between circRNAs and the PI3K/AKT signaling pathway in cancer progression. Signal Transduct Target Ther 2021; 6:400. [PMID: 34815385 PMCID: PMC8611092 DOI: 10.1038/s41392-021-00788-w] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 09/30/2021] [Accepted: 10/08/2021] [Indexed: 02/06/2023] Open
Abstract
Circular RNAs (circRNAs), covalently closed noncoding RNAs, are widely expressed in eukaryotes and viruses. They can function by regulating target gene expression, linear RNA transcription and protein generation. The phosphoinositide 3-kinase (PI3K)/AKT signaling pathway plays key roles in many biological and cellular processes, such as cell proliferation, growth, invasion, migration, and angiogenesis. It also plays a pivotal role in cancer progression. Emerging data suggest that the circRNA/PI3K/AKT axis modulates the expression of cancer-associated genes and thus regulates tumor progression. Aberrant regulation of the expression of circRNAs in the circRNA/PI3K/AKT axis is significantly associated with clinicopathological characteristics and plays an important role in the regulation of biological functions. In this review, we summarized the expression and biological functions of PI3K-AKT-related circRNAs in vitro and in vivo and assessed their associations with clinicopathological characteristics. We also further discussed the important role of circRNAs in the diagnosis, prognostication, and treatment of cancers.
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Affiliation(s)
- Chen Xue
- grid.452661.20000 0004 1803 6319State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003 China
| | - Ganglei Li
- grid.452661.20000 0004 1803 6319Department of Neurosurgery, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003 China
| | - Juan Lu
- grid.452661.20000 0004 1803 6319State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003 China
| | - Lanjuan Li
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, 310003, China.
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5
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Chen D, Ping S, Xu Y, Wang M, Jiang X, Xiong L, Zhang L, Yu H, Xiong Z. Non-Coding RNAs in Gastric Cancer: From Malignant Hallmarks to Clinical Applications. Front Cell Dev Biol 2021; 9:732036. [PMID: 34805143 PMCID: PMC8595133 DOI: 10.3389/fcell.2021.732036] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 10/18/2021] [Indexed: 01/19/2023] Open
Abstract
Gastric cancer (GC) is one of the most lethal malignancies worldwide. However, the molecular mechanisms underlying gastric carcinogenesis remain largely unknown. Over the past decades, advances in RNA-sequencing techniques have greatly facilitated the identification of various non-coding RNAs (ncRNAs) in cancer cells, including microRNAs (miRNAs), long non-coding RNAs (lncRNAs), and circular RNAs (circRNAs). Accumulating evidence has revealed that ncRNAs are essential regulators in GC occurrence and development. However, ncRNAs represent an emerging field of cancer research, and their complex functionality remains to be clarified. Considering the lack of viable biomarkers and therapeutic targets in GC, further studies should focus on elucidating the intricate relationships between ncRNAs and GC, which can be translated into clinical practice. In this review, we summarize recent research progress on how ncRNAs modulate the malignant hallmarks of GC, especially in tumor immune escape, drug resistance, and stemness. We also discuss the promising applications of ncRNAs as diagnostic biomarkers and therapeutic targets in GC, aiming to validate their practical value for clinical treatment.
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Affiliation(s)
- Di Chen
- Department of Gastroenterology, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shuai Ping
- Department of Orthopaedics, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yushuang Xu
- Department of Gastroenterology, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Mengmeng Wang
- Department of Gastroenterology, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xin Jiang
- Department of Gastroenterology, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lina Xiong
- Department of Gastroenterology, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Li Zhang
- Department of Gastroenterology, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Honglu Yu
- Department of Gastroenterology, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhifan Xiong
- Department of Gastroenterology, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Zhou Q, Ju LL, Ji X, Cao YL, Shao JG, Chen L. Plasma circRNAs as Biomarkers in Cancer. Cancer Manag Res 2021; 13:7325-7337. [PMID: 34584458 PMCID: PMC8464305 DOI: 10.2147/cmar.s330228] [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: 07/20/2021] [Accepted: 08/26/2021] [Indexed: 12/20/2022] Open
Abstract
The incidence and mortality of cancer are increasing each year. At present, the sensitivity and specificity of the blood biomarkers that were used in clinical practice are low, which make the detection rate of cancer decrease. With advances in bioinformatics and technology, some non-coding RNA as biomarkers can be easily detected through some traditional and new technologies. Circular RNAs (circRNAs) are non-coding RNAs, that is, they do not encode proteins, and have important regulatory functions. CircRNAs can remain stable in bodily fluids, such as in saliva, blood, urine, and especially plasma. The difference in the expression of plasma circRNAs between cancer patients and normal people may suggest that plasma circRNAs may play an important role in the occurrence and development of cancer. In this review, we summarized the clinical effect of plasma circRNAs in several high-incidence cancers. CircRNAs may be effective biomarkers for tumour diagnosis, treatment selection and prognosis evaluation.
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Affiliation(s)
- Qian Zhou
- Medical School of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, People's Republic of China
| | - Lin-Ling Ju
- Nantong Institute of Liver Disease, Nantong Third People's Hospital, Nantong University, Nantong, Jiangsu, People's Republic of China
| | - Xiang Ji
- Medical School of Nantong University, Nantong Third People's Hospital, Nantong, Jiangsu, People's Republic of China
| | - Ya-Li Cao
- Nantong Institute of Liver Disease, Nantong Third People's Hospital, Nantong University, Nantong, Jiangsu, People's Republic of China
| | - Jian-Guo Shao
- Nantong Institute of Liver Disease, Nantong Third People's Hospital, Nantong University, Nantong, Jiangsu, People's Republic of China
| | - Lin Chen
- Nantong Institute of Liver Disease, Nantong Third People's Hospital, Nantong University, Nantong, Jiangsu, People's Republic of China
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7
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Papatsirou M, Artemaki PI, Karousi P, Scorilas A, Kontos CK. Circular RNAs: Emerging Regulators of the Major Signaling Pathways Involved in Cancer Progression. Cancers (Basel) 2021; 13:cancers13112744. [PMID: 34205978 PMCID: PMC8198587 DOI: 10.3390/cancers13112744] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/28/2021] [Accepted: 05/29/2021] [Indexed: 12/11/2022] Open
Abstract
Signal transduction is an essential process that regulates and coordinates fundamental cellular processes, such as development, immunity, energy metabolism, and apoptosis. Through signaling, cells are capable of perceiving their environment and adjusting to changes, and most signaling cascades ultimately lead to alterations in gene expression. Circular RNAs (circRNAs) constitute an emerging type of endogenous transcripts with regulatory roles and unique properties. They are stable and expressed in a tissue-, cell-, and developmental stage-specific manner, while they are involved in the pathogenesis of several diseases, including cancer. Aberrantly expressed circRNAs can mediate cancer progression through regulation of the activity of major signaling cascades, such as the VEGF, WNT/β-catenin, MAPK, PI3K/AKT, and Notch signaling pathways, as well as by interfering with signaling crosstalk. Deregulated signaling can then function to induce angiogenesis, promote invasion, migration, and metastasis, and, generally, modulate the hallmarks of cancer. In this review article, we summarize the most recently described and intriguing cases of circRNA-mediated signaling regulation that are involved in cancer progression, and discuss the biomarker potential of circRNAs, as well as future therapeutic applications.
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Cheng Z, Liu G, Huang C, Zhao X. Upregulation of circRNA_100395 sponges miR-142-3p to inhibit gastric cancer progression by targeting the PI3K/AKT axis. Oncol Lett 2021; 21:419. [PMID: 33841580 PMCID: PMC8020390 DOI: 10.3892/ol.2021.12680] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 01/20/2021] [Indexed: 12/24/2022] Open
Abstract
Gastric cancer (GC) has a high morbidity and mortality, hence it is very important to elucidate the molecular pathogenesis mechanism of GC progression in order to find new treatment strategies. The present study aimed to explore the biological function of circular RNA_100395 (circRNA_100395) in GC. The expression level of circRNA_100395 in GC tissues, as well as normal epithelial cells and various gastric cancer cell lines, was detected using reverse transcription-quantitative PCR. Cell Counting Kit-8, EdU assay, flow cytometry and Transwell assays were performed to investigate cell proliferation, apoptosis, migration and invasion, respectively. A dual-luciferase reporter assay was performed to detect the correlation between circRNA_100395 and micro (mi)RNA-142-3p. Western blotting was performed to elucidate the potential regulatory mechanism. circRNA_100395 expression was found to be increased in GC tissues and cell lines. However, miR-142-3p expression was significantly reduced. Besides, low expression levels of circRNA_100395 were associated with poor tumor differentiation, advanced Tumor-Node-Metastasis stage, lymph node metastasis and shorter overall survival time. Moreover, overexpression of circRNA_100395 suppressed cell proliferation, increased the apoptosis rate and suppressed cell invasion and migration by inhibiting the PI3K/AKT signaling pathway. These findings also showed that miRNA-142-3p rescued the antitumor effects induced by circRNA_100395-overexpression. cirRNA_100395-overexpression had antitumor effects via regulating the miR-142-3p signaling pathway, which might be a promising treatment target for GC.
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Affiliation(s)
- Zhiyi Cheng
- Department of Gastrointestinal Surgery, Hospital Affiliated 5 to Nantong University, Taizhou People's Hospital, Taizhou, Jiangsu 225300, P.R. China
| | - Guiyuan Liu
- Department of Gastrointestinal Surgery, Hospital Affiliated 5 to Nantong University, Taizhou People's Hospital, Taizhou, Jiangsu 225300, P.R. China
| | - Chuanjiang Huang
- Department of Gastrointestinal Surgery, Hospital Affiliated 5 to Nantong University, Taizhou People's Hospital, Taizhou, Jiangsu 225300, P.R. China
| | - Xiaojun Zhao
- Department of Gastrointestinal Surgery, Hospital Affiliated 5 to Nantong University, Taizhou People's Hospital, Taizhou, Jiangsu 225300, P.R. China
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9
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Zheng Z, Li J, An J, Feng Y, Wang L. High miR-324-5p expression predicts unfavorable prognosis of gastric cancer and facilitates tumor progression in tumor cells. Diagn Pathol 2021; 16:5. [PMID: 33430926 PMCID: PMC7798222 DOI: 10.1186/s13000-020-01063-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 12/27/2020] [Indexed: 12/12/2022] Open
Abstract
Background Gastric cancer (GCa) is one of the six major malignancies in the world with low survival rate. Although there are advances in therapeutic approaches, the prognosis of patients with GCa remains not optimistic. Therefore, this study aimed to evaluate the prognostic value of miR-324-5p, as well as its functional role in GCa progression. Methods The expression of miR-324-5p in tumor tissues and cell lines was examined using real-time quantitative PCR. The prognostic value of miR-324-5p in patients with GCa was evaluated by Kaplan-Meier survival curve and Cox regression analysis. Gain- and loss-of-function experiments were performed to evaluate the biological function of miR-324-5p during the progression of GCa, and a target gene of miR-324-5p was proposed. Results The expression of miR-324-5p was up-regulated in GCa tissues and cell lines. Patients with high expression of miR-324-5p had more cases with positive lymph node metastasis, advanced TNM stage, and worse overall survival compared with patients with low expression. The elevated miR-324-5p was an independent prognostic indicator of GCa. In addition, the inhibition of miR-324-5p could suppress GCa cell proliferation, migration and invasion and promote cell apoptosis, and PTEN was demonstrated to serve as a direct target of miR-324-5p in GCa progression. Conclusion The present study indicates that miR-324-5p overexpression predicts poor prognosis in GCa patients, and the reduction of miR-324-5p can inhibit GCa biological processes. PTEN is a target gene of GCa, which may mediate the biological function of miR-324-5p in GCa progression. Supplementary Information The online version contains supplementary material available at 10.1186/s13000-020-01063-2.
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Affiliation(s)
- Zhong Zheng
- Department of Gastroenterology, Weifang People's Hospital, Weifang, 261041, Shandong, China
| | - Jun Li
- Department of General Surgery, Weifang Municipal Hospital, Weifang, 261021, Shandong, China
| | - Junyan An
- Department of Gastroenterology, Weifang People's Hospital, Weifang, 261041, Shandong, China
| | - Yikuan Feng
- Department of Gastroenterology, Weifang People's Hospital, Weifang, 261041, Shandong, China
| | - Lirong Wang
- Department of Gastroenterology, Sunshine Union Hospital, No.9000 Yingqian Road, Weifang, 261031, Shandong, China.
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Rajappa A, Banerjee S, Sharma V, Khandelia P. Circular RNAs: Emerging Role in Cancer Diagnostics and Therapeutics. Front Mol Biosci 2020; 7:577938. [PMID: 33195421 PMCID: PMC7655967 DOI: 10.3389/fmolb.2020.577938] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 08/26/2020] [Indexed: 12/17/2022] Open
Abstract
Circular RNAs (circRNAs) are rapidly coming to the fore as major regulators of gene expression and cellular functions. They elicit their influence via a plethora of diverse molecular mechanisms. It is not surprising that aberrant circRNA expression is common in cancers and they have been implicated in multiple aspects of cancer pathophysiology such as apoptosis, invasion, migration, and proliferation. We summarize the emerging role of circRNAs as biomarkers and therapeutic targets in cancer.
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Affiliation(s)
| | | | - Vivek Sharma
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani - Hyderabad Campus, Hyderabad, India
| | - Piyush Khandelia
- Department of Biological Sciences, Birla Institute of Technology and Science, Pilani - Hyderabad Campus, Hyderabad, India
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Lv X, Li P, Wang J, Gao H, Hei Y, Zhang J, Li S. hsa_circ_0000520 influences herceptin resistance in gastric cancer cells through PI3K-Akt signaling pathway. J Clin Lab Anal 2020; 34:e23449. [PMID: 32701211 PMCID: PMC7595902 DOI: 10.1002/jcla.23449] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/29/2020] [Accepted: 06/03/2020] [Indexed: 12/22/2022] Open
Abstract
Background To investigate whether hsa_circ_0000520 affects Herceptin resistance in gastric cancer by regulating the PI3K‐AKT signaling. Methods The expression of hsa_circ_0000520 was detected by qRT‐PCR in gastric cancer tissues and cell lines. A Herceptin‐resistant gastric cancer cell was established. PcDNA and pcDNA‐hsa_circ_0000520 were transfected into NCI‐N87R cells and treated with Herceptin at a concentration of 10 μg/mL for 24 hours. MTT tested cell proliferation, and apoptosis was measured by flow cytometry. IGF‐1 treatment was used to activate PI3K‐Akt signaling. The expression levels of related proteins were detected. Results The expression of hsa_circ_0000520 was reduced in gastric cancer tissues and cell lines, and hsa_circ_0000520 in NCI‐N87R cells was significantly lower than that of NCI‐N87 cells. Compared with the CON group, the cell viability of the Herceptin group was significantly reduced, the apoptosis rate was significantly increased, the level of Bax protein was significantly increased, and the levels of Bcl‐2, p‐PI3K, and p‐Akt protein were significantly reduced. Compared with the Herceptin + pcDNA group, the cell viability of the Herceptin + hsa_circ_0000520 group was significantly reduced, the apoptosis rate was significantly increased, the level of Bax protein was significantly increased, and the levels of p‐PI3K and p‐Akt proteins were significantly reduced. After IGF‐1 treatment, the cell viability was significantly increased, the apoptosis rate was significantly reduced, the level of Bax protein was significantly reduced, and the level of Bcl‐2 protein was significantly increased. Conclusion Hsa_circ_0000520 overexpression may reverse the Herceptin resistance of gastric cancer cells by inhibiting the PI3K‐Akt signaling pathway.
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Affiliation(s)
- Xukun Lv
- Department of Gastrointestinal Surgery, The Second People's Hospital of Liaocheng, Linqing, China
| | - Peizhe Li
- Department of Gastrointestinal Surgery, The Second People's Hospital of Liaocheng, Linqing, China
| | - Jinkai Wang
- Department of Gastrointestinal Surgery, The Second People's Hospital of Liaocheng, Linqing, China
| | - Hengling Gao
- Department of Gastrointestinal Surgery, The Second People's Hospital of Liaocheng, Linqing, China
| | - Yingrui Hei
- Department of Gastrointestinal Surgery, The Second People's Hospital of Liaocheng, Linqing, China
| | - Jianxian Zhang
- Department of Gastrointestinal Surgery, The Second People's Hospital of Liaocheng, Linqing, China
| | - Shuliang Li
- Department of Gastrointestinal Surgery, The Second People's Hospital of Liaocheng, Linqing, China
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Circular RNAs in Gastric Cancer: Potential Biomarkers and Therapeutic Targets. BIOMED RESEARCH INTERNATIONAL 2020; 2020:2790679. [PMID: 32685459 PMCID: PMC7345955 DOI: 10.1155/2020/2790679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 05/29/2020] [Accepted: 06/01/2020] [Indexed: 12/15/2022]
Abstract
Circular RNAs (circRNAs), as a recently established group of endogenous noncoding RNAs, have been involved in the occurrence and development of different malignancies. Gastric cancer (GC) remains a globally significant contributor to death in cancer patients due to insufficient early diagnosis, limited treatment measures, and poor prognosis. An increasing number of studies have found that many circRNAs are dysregulated in GC and are closely associated with its tumorigenesis and metastasis. Thus, circRNAs have the potential to serve as diagnostic and prognostic biomarkers and even therapeutic targets. This review comprehensively summarizes the most recent findings on how circRNAs influence GC progression and their clinical value. In addition, we present several methological deficiencies in the studies and provide some promising ideas for future research.
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Xue M, Hong W, Jiang J, Zhao F, Gao X. Circular RNA circ-LDLRAD3 serves as an oncogene to promote non-small cell lung cancer progression by upregulating SLC1A5 through sponging miR-137. RNA Biol 2020; 17:1811-1822. [PMID: 32658600 DOI: 10.1080/15476286.2020.1789819] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Circular RNAs (circRNAs) are closely associated with the development of non-small cell lung cancer (NSCLC); however, it is still unclear whether circular RNA circ-LDLRAD3 participated in the regulation of NSCLC progression. In this study, we found that circ-LDLRAD3 was high-expressed and miR-137 was low-expressed in NSCLC tissues and cells compared to their normal counterparts, which showed negative correlations in NSCLC tissues. Further experiments validated that miR-137 could be sponged and inhibited by circ-LDLRAD3 in NSCLC cells. In addition, knock-down of circ-LDLRAD3 and miR-137 overexpression promoted NSCLC cell apoptosis, and inhibited cell proliferation and invasion. Similarly, upregulation of circ-LDLRAD3 or miR-137 ablation had opposite effects on the above cell functions. Besides, the glutamine transporter SLC1A5 was validated to be the downstream target of circ-LDLRAD3 and miR-137, and upregulated circ-LDLRAD3 increased SLC1A5 expression levels by downregulating miR-137. Furthermore, the effects of downregulated circ-LDLRAD3 on cell proliferation, apoptosis and mobility were all reversed by knocking down miR-137 and overexpressing SLC1A5. Taken together, this in vitro study found that knock-down of circ-LDLRAD3 inhibited the development of NSCLC by regulating miR-137/SLC1A5 axis.
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Affiliation(s)
- Min Xue
- Department of Respiratory Medicine, Minhang Hospital, Fudan University , Shanghai, China
| | - Weijun Hong
- Department of Respiratory Medicine, Minhang Hospital, Fudan University , Shanghai, China
| | - Jun Jiang
- State Key Laboratory of Genetic Engineering, Shanghai Engineering Research Center of Industrial Microorganisms, School of Life Science, Fudan University , Shanghai, China
| | - Fang Zhao
- Department of Laboratory, Minhang Hospital, Fudan University , Shanghai, China
| | - Xiwen Gao
- Department of Respiratory Medicine, Minhang Hospital, Fudan University , Shanghai, China
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Wang HY, Wang YP, Zeng X, Zheng Y, Guo QH, Ji R, Zhou YN. Circular RNA is a popular molecule in tumors of the digestive system (Review). Int J Oncol 2020; 57:21-42. [PMID: 32377736 PMCID: PMC7252451 DOI: 10.3892/ijo.2020.5054] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Accepted: 04/06/2020] [Indexed: 02/06/2023] Open
Abstract
Most tumors of the digestive system, including esophageal, gastric, liver and colorectal cancer, are malignant tumors that are associated with rates of high morbidity and mortality. The lack of effective methods for early diagnosis is an important cause of poor prognosis for these malignancies. Circular RNAs (circRNAs) belong to a family of endogenous, covalently closed non‑coding RNAs that are characterized as having no 5' cap structures or 3' poly‑A tails. Shortly following discovery, circRNAs were considered to be a product of mis‑splicing and have no significant biological function. However, in recent years, accumulating evidence is demonstrating that they serve key roles in tumorigenesis and have the potential to serve as diagnostic markers. The present article summarizes the biogenesis and function of circRNAs and reviews their role in seven common types of tumor of the digestive system whilst exploring their potential as tumor markers and the significant roles they can serve in the digestive system, in addition to providing a referencing point for future studies of digestive system malignancies.
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Affiliation(s)
- Hao-Ying Wang
- Department of Gastroenterology
- Key Laboratory for Gastrointestinal Diseases of Gansu Province, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Yu-Ping Wang
- Department of Gastroenterology
- Key Laboratory for Gastrointestinal Diseases of Gansu Province, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Xi Zeng
- Department of Gastroenterology
- Key Laboratory for Gastrointestinal Diseases of Gansu Province, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Ya Zheng
- Department of Gastroenterology
- Key Laboratory for Gastrointestinal Diseases of Gansu Province, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Qing-Hong Guo
- Department of Gastroenterology
- Key Laboratory for Gastrointestinal Diseases of Gansu Province, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Rui Ji
- Department of Gastroenterology
- Key Laboratory for Gastrointestinal Diseases of Gansu Province, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China
| | - Yong-Ning Zhou
- Department of Gastroenterology
- Key Laboratory for Gastrointestinal Diseases of Gansu Province, The First Hospital of Lanzhou University, Lanzhou, Gansu 730000, P.R. China
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