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Shi C, Huang K, Soto J, Sankaran R, Kalia V, Onwumere O, Young M, Einbond L, Redenti S. Piperlongumine inhibits proliferation and oncogenic MYCN expression in chemoresistant metastatic retinoblastoma cells directly and through extracellular vesicles. Biomed Pharmacother 2023; 161:114554. [PMID: 36940616 PMCID: PMC10157982 DOI: 10.1016/j.biopha.2023.114554] [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: 11/06/2022] [Revised: 03/10/2023] [Accepted: 03/15/2023] [Indexed: 03/23/2023] Open
Abstract
Ocular retinoblastoma malignancies, which develop into metastatic phenotypes, result in poor prognosis and survival for infant and child patients. To improve the prognosis of metastatic retinoblastoma, it is important to identify novel compounds with less toxic side effects and higher therapeutic efficacy compared to existing chemotherapeutics. Piperlongumine (PL), a neuroprotective, plant-derived compound has been explored for its anticancer activities both in vitro and in vivo. Here, we analyze the potential efficacy of PL for metastatic retinoblastoma cell treatment. Our data reveal that PL treatment significantly inhibits cell proliferation in metastatic retinoblastoma Y79 cells compared to the commonly used retinoblastoma chemotherapeutic drugs carboplatin, etoposide, and vincristine. PL treatment also significantly increases cell death compared to treatment with other chemotherapeutic drugs. PL-induced cell-death signaling was associated with significantly higher caspase 3/7 activities and greater loss of mitochondrial membrane potential. PL was also internalized into Y79 cells with an estimated concentration of 0.310pM and expression analysis revealed reduced MYCN oncogene levels. We next examined extracellular vesicles derived from PL-treated Y79 cells. Extracellular vesicles in other cancers are pro-oncogenic, mediating systemic toxicities via the encapsulation of chemotherapeutic drugs. Within metastatic Y79 EV samples, an estimated PL concentration of 0.026pM was detected. PL treatment significantly downregulated Y79 EV cargo of the oncogene MYCN transcript. Interestingly, non-PL-treated Y79 cells incubated with EVs from PL-treated cells exhibited significantly reduced cell growth. These findings indicate that in metastatic Y79 cells, PL exhibits potent anti-proliferation effects and oncogene downregulation. Importantly, PL is also incorporated into extracellular vesicles released from treated metastatic cells with measurable anti-cancer effects on target cells at a distance from the site of primary treatment. The use of PL in the treatment of metastatic retinoblastoma may reduce primary tumor proliferation and inhibit metastatic cancer activity systemically via extracellular vesicle circulation.
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Affiliation(s)
- Cui Shi
- Lehman College, the City University of New York, 250 Bedford Park Boulevard West, Bronx, NY 10468, USA; Biochemistry Doctoral Program, The Graduate School, City University of New York, 365 Fifth Avenue, New York, NY 10016, USA
| | - Kunhui Huang
- Lehman College, the City University of New York, 250 Bedford Park Boulevard West, Bronx, NY 10468, USA; Biochemistry Doctoral Program, The Graduate School, City University of New York, 365 Fifth Avenue, New York, NY 10016, USA
| | - John Soto
- Lehman College, the City University of New York, 250 Bedford Park Boulevard West, Bronx, NY 10468, USA
| | - Renuka Sankaran
- Lehman College, the City University of New York, 250 Bedford Park Boulevard West, Bronx, NY 10468, USA; Biochemistry Doctoral Program, The Graduate School, City University of New York, 365 Fifth Avenue, New York, NY 10016, USA
| | - Vrinda Kalia
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY 10032, USA
| | - Onyekwere Onwumere
- Lehman College, the City University of New York, 250 Bedford Park Boulevard West, Bronx, NY 10468, USA; Biology Doctoral Program, The Graduate School of the City University of New York, 365 5th Avenue, New York, NY 10016, USA
| | - Michael Young
- The Schepens Eye Research Institute, Massachusetts Eye and Ear, Harvard Medical School, 20 Staniford Street, Boston, MA 02114, USA
| | - Linda Einbond
- Lehman College, the City University of New York, 250 Bedford Park Boulevard West, Bronx, NY 10468, USA
| | - Stephen Redenti
- Lehman College, the City University of New York, 250 Bedford Park Boulevard West, Bronx, NY 10468, USA; Biochemistry Doctoral Program, The Graduate School, City University of New York, 365 Fifth Avenue, New York, NY 10016, USA; Biology Doctoral Program, The Graduate School of the City University of New York, 365 5th Avenue, New York, NY 10016, USA.
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Jiang A, Wu W, Xu C, Mao L, Ao S, Guo H, Sun X, Tao J, Sang Y, Huang G. SP2509, a Selective Inhibitor of LSD1, Suppresses Retinoblastoma Growth by Downregulating β-catenin Signaling. Invest Ophthalmol Vis Sci 2022; 63:20. [PMID: 35297943 PMCID: PMC8944386 DOI: 10.1167/iovs.63.3.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose To study the role of lysine-specific demethylase 1 (LSD1) in retinoblastoma (RB) growth and to determine whether the LSD1 inhibitor SP2509 can inhibit RB progression. Methods We detected the levels of LSD1 in 12 RB tissue samples, two RB cell lines (Y79 and Weri-RB1), and a retinal pigment epithelium cell line (ARPE-19). Overexpression or knockdown of LSD1 was performed to examine the role of LSD1 in RB cancer cell survival. In vitro and in vivo experiments were conducted to detect the antitumor effect of SP2509, and the antitumor mechanism of SP2509 was examined by RNA sequencing and Western blot. Results LSD1 is overexpressed in RB tissues and cells and increases RB cancer cell viability and colony formation ability. The LSD1 inhibitor SP2509 inhibits RB cell proliferation in vitro and in vivo. Treatment with SP2509 increases the levels of dimethylated histone 3 lysine 4 (H3K4me2) and inhibits the expression of β-catenin signaling pathway–related proteins in RB cells. Conclusions We demonstrated that LSD1 is overexpressed in RB cells and promotes RB cell survival. The LSD1 inhibitor SP2509 exerted strong growth inhibition in vitro and in vivo, which was at least partially mediated by suppression of the β-catenin pathway.
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Affiliation(s)
- Alan Jiang
- Jiangxi Provincial Key Laboratory of Tumor Metastasis and Precision Therapy, Center Laboratory, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, PR China
| | - Weiqi Wu
- Department of Ophthalmology, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, PR China.,Medical Department of Graduate School, Nanchang University, Nanchang, Jiangxi, PR China
| | - Caixia Xu
- Department of Ophthalmology, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, PR China.,Medical Department of Graduate School, Nanchang University, Nanchang, Jiangxi, PR China
| | - Longbing Mao
- Department of Ophthalmology, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, PR China.,Medical Department of Graduate School, Nanchang University, Nanchang, Jiangxi, PR China
| | - Sha Ao
- Department of Ophthalmology, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, PR China.,Medical Department of Graduate School, Nanchang University, Nanchang, Jiangxi, PR China
| | - Huifeng Guo
- Department of Ophthalmology, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, PR China.,Medical Department of Graduate School, Nanchang University, Nanchang, Jiangxi, PR China
| | - Xiantao Sun
- Department of Ophthalmology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, Henan, PR China
| | - Jing Tao
- Department of Ophthalmology, Children's Hospital Affiliated to Zhengzhou University, Henan Children's Hospital, Zhengzhou Children's Hospital, Zhengzhou, Henan, PR China
| | - Yi Sang
- Jiangxi Provincial Key Laboratory of Tumor Metastasis and Precision Therapy, Center Laboratory, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, PR China
| | - Guofu Huang
- Jiangxi Provincial Key Laboratory of Tumor Metastasis and Precision Therapy, Center Laboratory, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, PR China.,Department of Ophthalmology, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, PR China
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Li Z, Zhang L, Liu D, Yang Z, Xuan D, Zhang Y. Knockdown of NRMT enhances sensitivity of retinoblastoma cells to cisplatin through upregulation of the CENPA/Myc/Bcl2 axis. Cell Death Dis 2022; 8:14. [PMID: 35013138 PMCID: PMC8748520 DOI: 10.1038/s41420-021-00622-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 08/09/2021] [Accepted: 08/18/2021] [Indexed: 11/09/2022]
Abstract
Chemotherapy resistance of tumor cells causes failure in anti-tumor therapies. Recently, N-terminal regulator of chromatin condensation 1 methyltransferase (NRMT) is abnormally expressed in different cancers. Hence, we speculate that NRMT may pay a crucial role in the development of chemosensitivity in retinoblastoma. We characterized the upregulation of NRMT in the developed cisplatin (CDDP)-resistant retinoblastoma cell line relative to parental cells. Loss-of-function experiments demonstrated that NRMT silencing enhanced chemosensitivity of retinoblastoma cells to CDDP. Next, NRMT was identified to enrich histone-H3 lysine 4 trimethylation in the promoter of centromere protein A (CENPA) by chromatin immunoprecipitation assay. Rescue experiments suggested that CENPA reduced chemosensitivity by increasing the viability and proliferation and reducing apoptosis of CDDP-resistant retinoblastoma cells, which was reversed by NRMT. Subsequently, CENPA was witnessed to induce the transcription of Myc and to elevate the expression of B cell lymphoma-2. At last, in vivo experiments confirmed the promotive effect of NRMT knockdown on chemosensitivity of retinoblastoma cells to CDDP in tumor-bearing mice. Taken together, NRMT is an inhibitor of chemosensitivity in retinoblastoma. Those findings shed new light on NRMT-targeted therapies for retinoblastoma.
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Affiliation(s)
- Zhongrui Li
- Department of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, P. R. China
| | - Lan Zhang
- Department of Cardiology, the Fourth Affiliated Hospital of Harbin Medical University, Harbin, 150001, P. R. China
| | - Dongrui Liu
- Department of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, P. R. China
| | - Zhanghui Yang
- Department of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, P. R. China
| | - Di Xuan
- Department of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, P. R. China
| | - Yi Zhang
- Department of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, P. R. China.
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Xu X, Zhao Y, Duan G, Du B. Downregulation of MIAT reduces the proliferation and migratory and invasive abilities of retinoblastoma cells by sponging miR-665 and regulating LASP1. Exp Ther Med 2021; 22:1342. [PMID: 34630696 DOI: 10.3892/etm.2021.10777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 04/28/2021] [Indexed: 12/21/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) can function as onco-lncRNAs in several types of human cancer, including retinoblastoma (Rb). The present study investigated the potential role and regulatory mechanism of the lncRNA myocardial infarction-associated transcript (MIAT) in Rb. To do so, the expression levels of MIAT, microRNA (miR)-665, and LIM and SH3 protein 1 (LASP1) in Rb tissues from patients or Rb cells were analysed using reverse transcription quantitative PCR. The interactions between miR-665 and MIAT/LASP1 were confirmed by the dual-luciferase reporter assay. MTT, Transwell (to assess migration and invasion) and western blotting assays were used to explore the functions of the MIAT/miR-665/LASP1 axis on Rb progression in vitro. The results of the present study indicated that MIAT targeted miR-665. In Rb tissues and cell lines, high expression of MIAT was observed, whereas miR-665 was downregulated in Rb tissues. Furthermore, the proliferation and migratory and invasive abilities of Rb Y79 and HXO-RB44 cells were decreased following MIAT downregulation or miR-665 overexpression. In addition, LASP1 was identified as a target gene of miR-665. Both the decreased expression of miR-665 and the elevated expression of LASP1 reversed the suppressive effects of MIAT knockdown on the proliferation and migratory and invasive abilities of Y79 cells. Furthermore, MIAT silencing attenuated the development of Rb by regulating the miR-665/LASP1 axis. Taken together, these findings suggested that MIAT may be considered as a possible therapeutic target for Rb.
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Affiliation(s)
- Xiabing Xu
- Department of Ophthalmology, No. 215 Hospital of Shaanxi Nuclear Industry, Xianyang, Shaanxi 712000, P.R. China
| | - Yadong Zhao
- Department of Ophthalmology, No. 215 Hospital of Shaanxi Nuclear Industry, Xianyang, Shaanxi 712000, P.R. China
| | - Gang Duan
- Department of Ophthalmology, No. 215 Hospital of Shaanxi Nuclear Industry, Xianyang, Shaanxi 712000, P.R. China
| | - Bo Du
- Department of Ophthalmology, No. 215 Hospital of Shaanxi Nuclear Industry, Xianyang, Shaanxi 712000, P.R. China
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Jiang Y, Xiao F, Wang L, Wang T, Chen L. Circular RNA has_circ_0000034 accelerates retinoblastoma advancement through the miR-361-3p/ADAM19 axis. Mol Cell Biochem 2020; 476:69-80. [PMID: 32844346 DOI: 10.1007/s11010-020-03886-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 08/14/2020] [Indexed: 12/29/2022]
Abstract
Retinoblastoma (RB) is an intraocular malignancy that mainly occurs in infants and young children under 5 years of age. Circular RNA hsa_circ_0000034 (circ_0000034) was reported to be upregulated in RB tissues. Nevertheless, the function and mechanism of circ_0000034 in RB are unclear. Expression of circ_0000034, microRNA-361-3p (miR-361-3p), and a disintegrin and metalloproteinase 19 (ADAM19) was examined via quantitative real-time polymerase chain reaction (qRT-PCR). Cell viability, migration, invasion, and apoptosis were determined though Cell Counting Kit-8 (CCK-8), transwell, or flow cytometry assays. Caspase-3 activity was detected using a caspase-3 activity assay kit. Some protein levels were examined using Western blot analysis. Dual-luciferase reporter assay, RNA immunoprecipitation (RIP) assay, or RNA pull-down assay were performed to verify the relationship between circ_0000034 or ADAM19 and miR-361-3p. The function of circ_0000034 in vivo was confirmed via animal experiment. We verified that circ_0000034 expression was elevated in RB tissues and cells. Circ_0000034 silencing reduced RB growth in vivo, repressed viability, migration, invasion, and EMT, and induced apoptosis of RB cells in vitro. Circ_0000034 acted as a sponge for miR-361-3p, which targeted ADAM19 in RB cells. Furthermore, the inhibition of miR-361-3p restored circ_0000034 knockdown-mediated impacts on viability, migration, invasion, apoptosis, and EMT of RB cells. Moreover, ADAM19 overexpression abolished the influence of miR-361-3p mimic on viability, migration, invasion, apoptosis, and EMT of RB cells. Circ_0000034 expedited RB progression through upregulating ADAM19 via sponging miR-361-3p, which indicated that circ_0000034 might a target for RB therapy.
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Affiliation(s)
- Yanhua Jiang
- Department of Ophthalmology, The Fourth People's Hospital of Shenyang, No. 20 Huanghe South Street, Huanggu District, Shenyang, 110031, Liaoning, China
| | - Fan Xiao
- Department of Ophthalmology, The Fourth People's Hospital of Shenyang, No. 20 Huanghe South Street, Huanggu District, Shenyang, 110031, Liaoning, China
| | - Lin Wang
- Department of Ophthalmology, The Fourth People's Hospital of Shenyang, No. 20 Huanghe South Street, Huanggu District, Shenyang, 110031, Liaoning, China
| | - Ting Wang
- Department of Ophthalmology, The Fourth People's Hospital of Shenyang, No. 20 Huanghe South Street, Huanggu District, Shenyang, 110031, Liaoning, China
| | - Linlin Chen
- Department of Ophthalmology, The Fourth People's Hospital of Shenyang, No. 20 Huanghe South Street, Huanggu District, Shenyang, 110031, Liaoning, China.
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Mao Y, Nie Q, Yang Y, Mao G. Identification of co‑expression modules and hub genes of retinoblastoma via co‑expression analysis and protein‑protein interaction networks. Mol Med Rep 2020; 22:1155-1168. [PMID: 32468072 PMCID: PMC7339782 DOI: 10.3892/mmr.2020.11189] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 04/01/2020] [Indexed: 12/14/2022] Open
Abstract
Retinoblastoma is a common intraocular malignant tumor in children. However, the molecular and genetic mechanisms of retinoblastoma remain unclear. The gene expression dataset GSE110811 was retrieved from Gene Expression Omnibus. After preprocessing, coexpression modules were constructed by weighted gene coexpression network analysis (WGCNA), and modules associated with clinical traits were identified. In addition, functional enrichment analysis was performed for genes in the indicated modules, and protein-protein interaction (PPI) networks and subnetworks were constructed based on these genes. Eight coexpression modules were constructed through WGCNA. Of these, the yellow module had the highest association with severity and age (r=0.82 and P=3e-07; r=0.72 and P=3e-05). The turquoise module had the highest association with months (r=−0.63 and P=5e-04). The genes in the two modules participate in multiple pathways of retinoblastoma, and by combining the PPI network and subnetworks; 10 hub genes were identified in the two modules. The present study identified coexpression modules and hub genes associated with clinical traits of retinoblastoma, providing novel insight into retinoblastoma progression.
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Affiliation(s)
- Yukun Mao
- Department of Orthopedics, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Qingbin Nie
- Department of Neurovascular Surgery, The Third Medical Centre, Chinese PLA (People's Liberation Army) General Hospital, Beijing 100039, P.R. China
| | - Yang Yang
- Department of Neurovascular Surgery, The Third Medical Centre, Chinese PLA (People's Liberation Army) General Hospital, Beijing 100039, P.R. China
| | - Gengsheng Mao
- Department of Neurovascular Surgery, The Third Medical Centre, Chinese PLA (People's Liberation Army) General Hospital, Beijing 100039, P.R. China
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Sun X, Shen H, Liu S, Gao J, Zhang S. Long noncoding RNA SNHG14 promotes the aggressiveness of retinoblastoma by sponging microRNA‑124 and thereby upregulating STAT3. Int J Mol Med 2020; 45:1685-1696. [PMID: 32236565 PMCID: PMC7169960 DOI: 10.3892/ijmm.2020.4547] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 01/30/2020] [Indexed: 12/11/2022] Open
Abstract
A long noncoding RNA called small nucleolar RNA host gene 14 (SNHG14) has been validated as a key regulator of cellular processes in multiple types of human cancer. However, to the best of our knowledge, the expression status and specific roles of SNHG14 in retinoblastoma (RB) have not been studied. The aims of the present study were to determine the expression status of SNHG14 in RB, assess the effects of SNHG14 on malignant characteristics of RB cells and investigate the mechanisms of action of SNHG14 in RB. SNHG14 expression levels in RB tissue samples and cell lines were measured by reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR). Cell proliferation, apoptosis, migration and invasion in vitro, and tumor growth in vivo were quantitated by the Cell Counting Kit‑8 assay, flow cytometry, migration and invasion assays, and mouse tumor xenograft experiments, respectively. The target microRNA (miRNA) of SNHG14 was predicted by bioinformatics analysis and was subsequently validated by a luciferase reporter assay, RNA immunoprecipitation (RIP) assay, RT‑qPCR, and western blot analysis. SNHG14 was identified to be significantly overexpressed in RB tissues and cell lines. SNHG14 overexpression was markedly associated with the intraocular international retinoblastoma classification stage, optic nerve invasion, and differentiation grade among patients with RB. The patients in the SNHG14 high‑expression group exhibited shorter overall survival compared with the SNHG14 low‑expression group. Functional analysis revealed that SNHG14 silencing inhibited cell proliferation, migration and invasion, and increased apoptosis in vitro, and decreased tumor growth in vivo. SNHG14 directly interacted with, and functioned as a competing endogenous RNA (ceRNA) of, miR‑124, consequently upregulating signal transducer and activator of transcription 3 (STAT3). miR‑124 inhibition and STAT3 expression recovery attenuated the effects of the SNHG14 silencing on RB cells. In conclusion, SNHG14 served as a ceRNA to upregulate STAT3 by sponging miR‑124. Therefore, targeting the SNHG14/miR‑124/STAT3 pathway may be an effective therapeutic strategy against RB.
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Affiliation(s)
- Xiaowen Sun
- Department of Ophthalmology, People's Hospital of Rizhao, Rizhao, Shandong 276800, P.R. China
| | - Hui Shen
- Department of Ophthalmology, People's Hospital of Rizhao, Rizhao, Shandong 276800, P.R. China
| | - Shubin Liu
- Department of Oncology, Binzhou People's Hospital, Binzhou, Shandong 256610, P.R. China
| | - Jing Gao
- Department of Ophthalmology, Weifang Ophthalmic Hospital, Weifang, Shandong 261041, P.R. China
| | - Shuyan Zhang
- Department of Ophthalmology, People's Hospital of Rizhao, Rizhao, Shandong 276800, P.R. China
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Wang S, Du S, Lv Y, Zhang F, Wang W. MicroRNA-665 inhibits the oncogenicity of retinoblastoma by directly targeting high-mobility group box 1 and inactivating the Wnt/β-catenin pathway. Cancer Manag Res 2019; 11:3111-3123. [PMID: 31114354 PMCID: PMC6489654 DOI: 10.2147/cmar.s200566] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Accepted: 02/25/2019] [Indexed: 12/11/2022] Open
Abstract
Purpose: Previous studies have revealed that microRNA-665 (miR-665) is dysregulated in a variety of human cancers. However, little is known regarding its expression profiles and functions in retinoblastoma (RB). Therefore, the aims of our study were to evaluate miR-665 expression in RB and determine the precise roles of miR-665 in the progression of RB. Patients and methods: Herein, RT-qPCR was used to determine miR-665 expression levels in RB tissues and cell lines, and a series of functional experiments were performed to explore the influence of miR-665 on RB cell proliferation, colony formation, apoptosis, migration, and invasion as well as tumor growth. The molecular mechanisms underlying the tumor-suppressive action of miR-665 in RB were also explored. Results: We found that miR-665 was markedly reduced in RB tissues and cell lines and that lower miR-665 expression was strongly associated with tumor size, TNM stage, and differentiation in patients with RB. Exogenous expression of miR-665 suppressed cell proliferation, colony formation, migration, and invasion, and induced cell apoptosis in RB cells, while silencing miR-665 expression had the opposite effects. In addition, upregulation of miR-665 decreased the tumor growth of RB cells in vivo. High-mobility group box 1 (HMGB1) was identified as a direct target of miR-665 in RB cells, and decreasing the expression of HMGB1 simulated the regulatory effects of miR-665 overexpression in RB cells, while knockdown of HMGB1 expression counteracted the miR-665-mediated antitumor effects in RB cells. Moreover, miR-665 was shown to regulate the Wnt/β-catenin signaling pathway by targeting HMGB1 in vitro and in vivo. Conclusion: Taken together, our in vitro and in vivo results suggest that miR-665 acts as a tumor-suppressive miRNA in RB by directly targeting HMGB1 and inactivating the Wnt/β-catenin pathway. Hence, this miRNA is a candidate prognostic biomarker and therapeutic target in patients with RB.
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Affiliation(s)
- Shuai Wang
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, People's Republic of China
| | - Shanshan Du
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, People's Republic of China
| | - Yong Lv
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, People's Republic of China
| | - Fengyan Zhang
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, People's Republic of China
| | - Wenzhan Wang
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, People's Republic of China
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MiR-140-5p suppresses retinoblastoma cell growth via inhibiting c-Met/AKT/mTOR pathway. Biosci Rep 2018; 38:BSR20180776. [PMID: 30291212 PMCID: PMC6265618 DOI: 10.1042/bsr20180776] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 08/18/2018] [Accepted: 08/22/2018] [Indexed: 12/16/2022] Open
Abstract
MiR-140-5p is low expression and acts as a tumor suppressor in various types of human cancers. However, the potential role of miR-140-5p in retinoblastoma (RB) remains unknown. In the present study, we performed the miRNA microarray analysis to investigate whether miRNAs expression are associated with RB tumorigenesis in RB tissues. We found that a large set of miRNAs were ectopic expressions and miR-140-5p is most significantly down-regulated in human RB tissues compared with normal retinas. In addition, low miR-140-5p expression is associated with clinicopathological features (differentiation, invasion, T classification, N classification, cTNM stage, and largest tumor base) and poor survival in RB patients. Furthermore, our results showed that overexpression of miR-140-5p suppresses proliferation and induces apoptosis and cell cycle arrest in RB cell. Meanwhile, we confirmed that c-Met is the functional target of miR-140-5p in RB cell, and miR-140-5p expression is negatively correlated with c-Met in RB tissues. We also found that inhibition of c-Met also suppresses proliferation and induces apoptosis and cell cycle arrest in RB cell. Interestingly, c-Met can rescue the suppressive effects of miR-140-5p on RB cell growth and cell cycle arrest. More importantly, our findings indicated that miR-140-5p may inhibit cell growth via blocking c-Met/AKT/mTOR signaling pathway. Collectively, these results suggested that miR-140-5p might be a potential biomarker and target in the diagnosis and treatment of RB.
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Liu H, Cao B, Zhao Y, Liang H, Liu X. Upregulated miR-221/222 promotes cell proliferation and invasion and is associated with invasive features in retinoblastoma. Cancer Biomark 2018; 22:621-629. [PMID: 29843209 DOI: 10.3233/cbm-170721] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND OBJECTIVES MicroRNA (miR-221/222) is frequently overexpressed in many cancers and is associated with poor prognosis. However, the role of miR-221/222 in retinoblastoma (RB) remains unclear. This study aimed to detect the clinical significance of miR-221/222 in RB patients and explore its role in RB cells in vitro. METHODS Expression of miR-221/222 was assessed in fresh RB tissue collected from 64 eyes and normal retinal tissues from 18 unrelated donor cadaver eyes by quantitative real time RT-PCR analysis (qRT-PCR), and correlated with the histopathological findings. Human RB Y79 cells were transfected with miR-221/222 precursors or inhibitors to overexpress or downregulate miR-221/222 expression, respectively, using Lipofectamine 2000 reagent. The biological effects of miR-221/222 were then assessed by cell viability assays, colony formation assays, apoptosis detection assays, Matrigel® invasion assays, and wound-healing assays. RESULTS Higher miR-221/222 expression was detected in RB tissues compared to that of the normal retinal tissues (p< 0.001). Higher miR-221/222 expression was correlated with invasion in patients with RB. Targeting of miR-221/222 induced apoptosis and inhibited Y79 cell proliferation, migration, and invasion in vitro. However, overexpression of miR-221/222 promoted Y79 cell proliferation, migration, and invasion in vitro. CONCLUSIONS Overexpression of miR-221/222 was associated with tumor invasiveness in patients with RB. The miR-221/222 cluster might be used as a potential therapeutic strategy in clinical practice.
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Affiliation(s)
- Hongqian Liu
- Department of Pharmacy, The Central Hospital of Linyi, Yishui, Shangdong, China
| | - Bofeng Cao
- Department of Imaging, Yantai Yuhuangding Hospital, Yantai, Shangdong, China
| | - Yuanyuan Zhao
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, Shangdong, China
| | - Haijing Liang
- Department of Ophthalmology, The Affiliated Hospital of Qingdao University, Qingdao, Shangdong, China
| | - Xinfeng Liu
- Department of Nuclear medicine, The Affiliated Hospital of Qingdao University, Qingdao, Shangdong, China
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Yang G, Fu Y, Zhang L, Lu X, Li Q. miR106b regulates retinoblastoma Y79 cells through Runx3. Oncol Rep 2017; 38:3039-3043. [PMID: 28901461 DOI: 10.3892/or.2017.5931] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 07/21/2017] [Indexed: 11/06/2022] Open
Abstract
MicroRNAs are increasingly recognized as important regulators of cancer. The aim of the present study was to investigate the role of miR-106b in the regulation of Y79 retinoblastoma. Y79 cells were transfected with antisense oligonucleotides (ASO) against miR-106b (ASO-miR-106b) or ASO-control. After transfection, the levels of miR-106b were monitored with real-time PCR (RT-PCR). The effects of ASO-miR-106b transfection on cell viability was evaluated by Cell Counting Kit-8 (CCK-8) analysis at 24, 48 and 72 h after transfection. Subsequently, the cells were stained with Annexin V-FITC and propidium iodide (PI) and subjected to flow cytometry to assess cell apoptosis. Transwell assay was used to analyze cell migration. Changes in Runt-related transcription factor 3 (Runx3) mRNA and proteins levels were also evaluated. miR-106b was downregulated by ASO-miR-106b at 48 and 72 h after transfection, accompanied by a decrease in cell viability and proliferation, as well as an increase in cell apoptosis. Transwell analysis indicated that cells treated with ASO-miR-106b exhibited significantly lower cell migratory abilities. The mRNA and protein level of Runx3 were upregulated after transfection. These results demonstrated that suppression of miR-106b inhibited Y79 cell proliferation and migration. The upregulation of Runx3 after miR-106b suppression ascertained that Runx3 is a tumor-suppressor in retinoblastoma and is a target of miR-106b.
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Affiliation(s)
- Ge Yang
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Yang Fu
- Department of General Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Luxi Zhang
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Xiaoyan Lu
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
| | - Qiuming Li
- Department of Ophthalmology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
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Chen P, Yu N, Zhang Z, Zhang P, Yang Y, Wu N, Xu L, Zhang J, Ge J, Yu K, Zhuang J. Thrombospondin-1 might be a therapeutic target to suppress RB cells by regulating the DNA double-strand breaks repair. Oncotarget 2017; 7:6105-20. [PMID: 26756218 PMCID: PMC4868743 DOI: 10.18632/oncotarget.6835] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Accepted: 12/29/2015] [Indexed: 12/04/2022] Open
Abstract
Retinoblastoma (RB) arises from the retina, and its growth usually occurs under the retina and toward the vitreous. Ideal therapy should aim to inhibit the tumor and protect neural cells, increasing the patient's life span and quality of life. Previous studies have demonstrated that Thrombospondin-1 (TSP-1) is associated with neurogenesis, neovascularization and tumorigenesis. However, at present, the bioactivity of TSP-1 in retinoblastoma has not been defined. Herein, we demonstrated that TSP-1 was silenced in RB cell lines and clinical tumor samples. HDAC inhibitor, Trichostatin A (TSA), could notably transcriptionally up-regulate TSP-1 in RB cells, WERI-Rb1 cells and Y79 cells. Moreover, we found human recombinant TSP-1 (hTSP-1) could significantly inhibit the cell viability of RB cells both in vitro and in vivo. Interestingly, hTSP-1 could significantly induce the expression of γ-H2AX, a well-characterized in situ marker of DNA double-strand breaks (DSBs) in RB cells. The DNA NHEJ pathway in WERI-Rb1 cells could be significantly inhibited by hTSP-1. A mutation in Rb1 might be involved in the hTSP-1-medicated γ-H2AX increasing in WERI-Rb1 cells. Furthermore, hTSP-1 could inhibit RB cells while promoting retinal neurocyte survival in the neuronal and retinoblastoma cell co-culture system. As such, TSP-1 may become a therapeutic target for treatment of retinoblastoma.
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Affiliation(s)
- Pei Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, P. R. China 510060
| | - Na Yu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, P. R. China 510060
| | - Zhang Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, P. R. China 510060
| | - Ping Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, P. R. China 510060
| | - Ying Yang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, P. R. China 510060
| | - Nandan Wu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, P. R. China 510060
| | - Lijun Xu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, P. R. China 510060
| | - Jing Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, P. R. China 510060
| | - Jian Ge
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, P. R. China 510060
| | - Keming Yu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, P. R. China 510060
| | - Jing Zhuang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, P. R. China 510060
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