1
|
Li Z, Tian JM, Chu Y, Zhu HY, Wang JJ, Huang J. Long non-coding RNA PVT1 (PVT1) affects the expression of CCND1 and promotes doxorubicin resistance in osteosarcoma cells. J Bone Oncol 2023; 43:100512. [PMID: 38021073 PMCID: PMC10665705 DOI: 10.1016/j.jbo.2023.100512] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 11/01/2023] [Accepted: 11/06/2023] [Indexed: 12/01/2023] Open
Abstract
Background Acquired drug-resistance is the major risk factor for poor prognosis and short-term survival in patients with osteosarcoma (OS). Accumulating evidence has revealed that long noncoding RNAs (lncRNAs), including plasmacytoma variant translocation 1 (PVT1), play potential regulatory roles in the malignant development of OS. Considering the subcellular distribution of PVT1 as both nuclear and cytoplasmic lncRNA, a thorough exploration of its extensive mechanisms becomes essential. Methods The GEO database was utilized for the acquisition of gene expression data, which was subsequently analyzed to fulfill the research objectives. The subcellular localization of PVT1 in OS cells was determined using fluorescence in situ hybridization (FISH) and quantitative real-time polymerase chain reaction (qRT-PCR). Additionally, the sensitivity of OS cells to doxorubicin was comprehensively evaluated through measurements of cell viability, site-specific proliferation capacity, and the relative expression abundance of multidrug resistance-related proteins (MRPs). In order to investigate the differential response of OS cells with varying levels of PVT1 expression to doxorubicin, pulmonary metastasis mice models were established for in vivo studies. Molecular interactions were further examined using the dual-luciferase assay and RNA immunoprecipitation assay (RIP) to analyze the binding sites of miR-15a-5p and miR-15b-5p on PVT1 and G1/S-specific cyclinD1 (CCND1) mRNA. Furthermore, the chromatin immunoprecipitation (ChIP) and dual-luciferase assay were employed to assess the transcriptional activation of the proto-oncogene c-myc (MYC) on the CCND1 promoter and identify the corresponding binding sites. Results In doxorubicin resistant OS cells, transcription levels of PVT1, MYC and CCND1 were significantly higher than those in original cells. In vivo experiments demonstrated that OS cells rich in PVT1 expression exhibited enhanced tumorigenicity and resistance to doxorubicin. In vitro experiments, it has been observed that overexpression of PVT1 in OS cells is accompanied by an upregulation of CCND1, thereby facilitating resistance to doxorubicin. Nonetheless, this PVT1-induced resistance can be effectively attenuated by the knockdown of CCND1. Mechanistically, PVT1 functions as a competitive endogenous RNA (ceRNA) that influences the expression of CCND1 by inhibiting the degradation function of miR-15a-5p and miR-15b-5p on CCND1 mRNA. Additionally, as a neighboring gene of MYC, PVT1 plays a role in maintaining MYC protein stability, which further enhances MYC-dependent CCND1 transcriptional activity. Conclusion The resistance of OS cells to doxorubicin is facilitated by PVT1, which enhances the expression of CCND1 through a dual mechanism. This findings offer a novel perspective for comprehending the intricate regulatory mechanisms of long non-coding RNA in influencing the expression of coding genes.
Collapse
Affiliation(s)
- Zi Li
- Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jia-Ming Tian
- Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yi Chu
- Department of Gastroenterology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Hong-Yi Zhu
- Department of Gastroenterology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jun-Jie Wang
- Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jun Huang
- Department of Orthopedics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| |
Collapse
|
2
|
Li P, Qi J, Zhong Y, Ding A, Xiao H. Proteomic profiling reveals KRT6C as a probable hereterodimer partner for KRT9: New insights into re-classifying epidermolytic palmoplantar keratoderma (EPPK) and a milder form of pachyonychia congenita (PC-K6c) as a group of genetic cutaneous disorders. J Proteomics 2023; 287:104971. [PMID: 37467889 DOI: 10.1016/j.jprot.2023.104971] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 05/01/2023] [Accepted: 07/05/2023] [Indexed: 07/21/2023]
Abstract
Epidermolytic palmoplantar keratoderma (EPPK), a highly penetrant autosomal dominant genodermatosis, is characterized by diffuse keratoses on palmplantar epidermis. The keratin 9 gene (KRT9) is responsible for EPPK. To date, phenotypic therapy is the primary treatment for EPPK. Because KRT9 pairs with a type II keratin-binding partner to function in epidermis, identifying the interaction partner is an essential first step in revealing EPPK pathogenesis and its fundamental treatment. In this study, we proved that keratin 6C (KRT6C) is a probable hereterodimer partner for KRT9. In silico model for KRT6C/KRT9 shows a typical coiled-coil structure in their 2B domains. Proteomics analysis shows that KRT6C/KRT9 pair is in a densely connected protein-protein interaction network, where proteins participate jointly in regulating cytoskeleton organization and keratinization. This study shows that co-immunoprecipitation coupled with mass spectroscopy and proteomics analysis provide a sensitive approach, which compensates for inevitable inadequacies of anti-keratin 6C antibody and helps discover the probable hereterodimer partner KRT6C for KRT9. The acknowledgement of KRT6C/KRT9 pairwise relationship may help re-classify EPPK and PC-K6c (a milder form of pachyonychia congenita, caused by KRT6C) as a group of hereditary defects at a molecular-based level, and lay foundation for deciphering the keratin network contributing to EPPK and PC-K6c. SIGNIFICANCE OF THE STUDY: What is already known about this topic? KRT9 and KRT6C are disease-causing factors for epidermolytic palmoplantar keratoderma (EPPK) and a milder form of pachyonychia congenita (PC-K6c), respectively. EPPK and PC-K6c have some symptom similarities. Keratins are the major structural proteins in epithelial cells. Each of the type I keratin is matched by a particular type II keratin to assemble a coiled-coil heterodimer. The hereterodimer partner for KRT9 is unknown. What does this study add? We discovered and proved that KRT6C is a probable hereterodimer partner for KRT9 in palmplantar epidermis in a native endogenous environment by using co-immunoprecipitation coupled with mass spectroscopy and proteomics analysis, etc. The proteomics analysis shows that KRT6C/KRT9 keratin pair is in a densely connected protein-protein interaction network, where proteins participate jointly in regulating intermediate filament-based cytoskeleton organization and keratinization processes. What are the implications of this work? The new understanding of probable KRT6C/KRT9 pairwise correlation may help re-classify the genetic cutaneous disorders EPPK and PC-K6c as a group of hereditary defects at a molecular-based level, and lay foundation for pathogenic mechanism research in EPPK and PC-K6c. The densely related network components derived from the proteomic data using Metascape in the study and pairwise regulation fashion of specific keratin pairs should attract more attention in the further explorations when investigators concern the physiological functions of keratins and the pathogenesis of related skin diseases.
Collapse
Affiliation(s)
- Peiyao Li
- Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, China NHC Key Laboratory of Carcinogenesis, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Jialin Qi
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, Hunan, People's Republic of China
| | - Yuhui Zhong
- Department of Pathology, School of Medicine, Hunan Normal University, Changsha, Hunan, People's Republic of China
| | - Aoli Ding
- Department of Pathology, School of Medicine, Hunan Normal University, Changsha, Hunan, People's Republic of China
| | - Heng Xiao
- Department of Pathology, School of Medicine, Hunan Normal University, Changsha, Hunan, People's Republic of China.
| |
Collapse
|
3
|
Gasparello J, Papi C, Zurlo M, Volpi S, Gambari R, Corradini R, Casnati A, Sansone F, Finotti A. Cationic Calix[4]arene Vectors to Efficiently Deliver AntimiRNA Peptide Nucleic Acids (PNAs) and miRNA Mimics. Pharmaceutics 2023; 15:2121. [PMID: 37631335 PMCID: PMC10460053 DOI: 10.3390/pharmaceutics15082121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 08/03/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
One of the most appealing approaches for regulating gene expression, named the "microRNA therapeutic" method, is based on the regulation of the activity of microRNAs (miRNAs), the intracellular levels of which are dysregulated in many diseases, including cancer. This can be achieved by miRNA inhibition with antimiRNA molecules in the case of overexpressed microRNAs, or by using miRNA-mimics to restore downregulated microRNAs that are associated with the target disease. The development of new efficient, low-toxic, and targeted vectors of such molecules represents a key topic in the field of the pharmacological modulation of microRNAs. We compared the delivery efficiency of a small library of cationic calix[4]arene vectors complexed with fluorescent antimiRNA molecules (Peptide Nucleic Acids, PNAs), pre-miRNA (microRNA precursors), and mature microRNAs, in glioma- and colon-cancer cellular models. The transfection was assayed by cytofluorimetry, cell imaging assays, and RT-qPCR. The calix[4]arene-based vectors were shown to be powerful tools to facilitate the uptake of both neutral (PNAs) and negatively charged (pre-miRNAs and mature microRNAs) molecules showing low toxicity in transfected cells and ability to compete with commercially available vectors in terms of delivery efficiency. These results could be of great interest to validate microRNA therapeutics approaches for future application in personalized treatment and precision medicine.
Collapse
Affiliation(s)
- Jessica Gasparello
- Section of Biochemistry and Molecular Biology, Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy; (J.G.); (C.P.); (M.Z.); (R.G.)
| | - Chiara Papi
- Section of Biochemistry and Molecular Biology, Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy; (J.G.); (C.P.); (M.Z.); (R.G.)
| | - Matteo Zurlo
- Section of Biochemistry and Molecular Biology, Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy; (J.G.); (C.P.); (M.Z.); (R.G.)
| | - Stefano Volpi
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, 43124 Parma, Italy; (S.V.); (R.C.); (A.C.)
| | - Roberto Gambari
- Section of Biochemistry and Molecular Biology, Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy; (J.G.); (C.P.); (M.Z.); (R.G.)
| | - Roberto Corradini
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, 43124 Parma, Italy; (S.V.); (R.C.); (A.C.)
| | - Alessandro Casnati
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, 43124 Parma, Italy; (S.V.); (R.C.); (A.C.)
| | - Francesco Sansone
- Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, 43124 Parma, Italy; (S.V.); (R.C.); (A.C.)
| | - Alessia Finotti
- Section of Biochemistry and Molecular Biology, Department of Life Sciences and Biotechnology, University of Ferrara, 44121 Ferrara, Italy; (J.G.); (C.P.); (M.Z.); (R.G.)
| |
Collapse
|
4
|
Shao Y, Li H, Wu Y, Wang X, Meng J, Hu Z, Xia L, Cao S, Tian W, Zhang Y, Feng X, Zhang X, Li Y, Yang G. The feedback loop of AURKA/DDX5/TMEM147-AS1/let-7 drives lipophagy to induce cisplatin resistance in epithelial ovarian cancer. Cancer Lett 2023; 565:216241. [PMID: 37217070 DOI: 10.1016/j.canlet.2023.216241] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 04/25/2023] [Accepted: 05/18/2023] [Indexed: 05/24/2023]
Abstract
Platinum-taxane chemotherapy is the first-line standard-of-care treatment administered to patients with epithelial ovarian cancer (EOC), and faces the major challenge of cisplatin resistance. Aurora Kinase A (AURKA) is a serine/threonine kinase, acting as an oncogene by participating in microtubule formation and stabilization. In this study, we demonstrate that AURKA binds with DDX5 directly to form a transcriptional coactivator complex to induce the transcription and upregulation of an oncogenic long non-coding RNA, TMEM147-AS1, which sponges hsa-let-7b/7c-5p leading to the increasing expression of AURKA as a feedback loop. The feedback loop maintains EOC cisplatin resistance via activation of lipophagy. These findings underscore the feedback loop of AURKA/DDX5/TMEM147-AS1/let-7 provides mechanistic insights into the combined use of TMEM147-AS1 siRNA and VX-680, which can help improve EOC cisplatin treatment. Our mathematical model shows that the feedback loop has the potential to act as a biological switch to maintain on- (activated) or off- (deactivated) status, implying the possible resistance of single use of VX-680 or TMEM147-AS1 siRNA. The combined use reduces both the protein level of AURKA using TMEM147-AS1 siRNA and its kinase activity using VX-680, showing more significant effect than the use of TMEM147-AS1 siRNA or VX-680 alone, which provides a potential strategy for EOC treatment.
Collapse
Affiliation(s)
- Yang Shao
- Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Hui Li
- Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China
| | - Yong Wu
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China
| | - XianYi Wang
- Lab for Noncoding RNA & Cancer, School of Life Sciences, Shanghai University, Shanghai, 200444, China
| | - Jiao Meng
- Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - ZhiXiang Hu
- Department of Integrative Oncology, Fudan University Shanghai Cancer Center, and Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
| | - LingFang Xia
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China
| | - SiYu Cao
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China
| | - WenJuan Tian
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China
| | - YunKui Zhang
- Department of Anesthesiology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China
| | - Xu Feng
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, 200032, China
| | - XiaoFan Zhang
- Shanghai Collaborative Innovation Center of Agri-Seeds, Joint Center for Single Cell Biology, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
| | - YanLi Li
- Lab for Noncoding RNA & Cancer, School of Life Sciences, Shanghai University, Shanghai, 200444, China.
| | - Gong Yang
- Cancer Institute, Fudan University Shanghai Cancer Center, Shanghai, 200032, China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, 200032, China; Central Laboratory, The Fifth People's Hospital of Shanghai Fudan University, Shanghai, 200240, China.
| |
Collapse
|
5
|
Nrp-1 Mediated Plasmatic Ago2 Binding miR-21a-3p Internalization: A Novel Mechanism for miR-21a-3p Accumulation in Renal Tubular Epithelial Cells during Sepsis. BIOMED RESEARCH INTERNATIONAL 2020; 2020:2370253. [PMID: 32923478 PMCID: PMC7453242 DOI: 10.1155/2020/2370253] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 07/24/2020] [Accepted: 07/30/2020] [Indexed: 12/13/2022]
Abstract
The mechanism underlying sepsis-associated acute kidney injury (SAKI), which is an independent risk factor for sepsis-associated death, is unclear. A previous study indicates that during sepsis miR-21a-3p accumulates in renal tubular epithelial cells (TECs) as the mediator of inflammation and mediates TEC malfunction by manipulating its metabolism. However, the specific mechanism responsible for the accumulation of miR-21a-3p in TECs during sepsis is unrevealed. In this study, a cecal ligation and puncture- (CLP-) induced sepsis rat model and rat TEC line were used to elucidate the mechanism. Firstly, miR-21a-3p and Ago2 levels were found out to increase in both plasma and TECs during sepsis, and the increase of intracellular Ago2 and miR-21a-3p could be mitigated when Ago2 was either inactivated or downregulated in septic plasma. Moreover, membrane Nrp-1 expression of TECs was increased significantly during sepsis and Nrp-1 knockdown also mitigated the rise of both the intracellular Ago2 and miR-21a-3p levels in TECs incubated with septic plasma. Furthermore, it was revealed that Ago2 can be internalized by TECs mediated with Nrp-1 and this process had no effect on the intracellular content of miR-21a-3p. Both Ago2 and miR-21a-3p could bind to TECs derived Nrp-1 directly. Finally, it was determined that miR-21a-3p was internalized by TECs via Nrp-1 and Ago2 facilitated this process. Taken together, it can be concluded from our results that Ago2 binding miR-21a-3p from septic plasma can be actively internalized by TECs via Nrp-1 mediated cell internalization, and this mechanism is crucial for the rise of intracellular miR-21a-3p content of TECs during sepsis. These findings will improve our understanding of the mechanisms underlying SAKI and aid in developing novel therapeutic strategies.
Collapse
|
6
|
LncRNA LEF1-AS1 promotes osteogenic differentiation of dental pulp stem cells via sponging miR-24-3p. Mol Cell Biochem 2020; 475:161-169. [DOI: 10.1007/s11010-020-03868-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Accepted: 08/01/2020] [Indexed: 12/21/2022]
|
7
|
Song L, Wang L, Pan X, Yang C. lncRNA OIP5-AS1 targets ROCK1 to promote cell proliferation and inhibit cell apoptosis through a mechanism involving miR-143-3p in cervical cancer. ACTA ACUST UNITED AC 2020; 53:e8883. [PMID: 31939597 PMCID: PMC6967205 DOI: 10.1590/1414-431x20198883] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 10/11/2019] [Indexed: 02/07/2023]
Abstract
Opa-interacting protein 5 antisense transcript 1 (OIP5-AS1) is one kind of
cytoplasmic long non-coding RNA (lncRNA), which has been demonstrated to play a
critical function in multiple cancers. However, the detailed mechanism of
OIP5-AS1 in the regulation of cervical cancer progression is still obscure.
Here, we demonstrated that lncRNA OIP5-AS1 was upregulated in cervical cancer
and was correlated with poor prognosis by bioinformatics studies. OIP5-AS1
depletion inhibited cell proliferation and promoted cell apoptosis in cervical
cancer cells. Furthermore, we clarified that ROCK1 was the downstream effector
of OIP5-AS1 and OIP5-AS1 acted as a molecular sponge of miR-143-3p. Finally, we
verified that OIP5-AS1 exerted its function in the regulation of cervical cancer
progression via interacting with miR-143-3p to regulate ROCK1 expression. Our
study revealed novel mechanisms about how lncRNA OIP5-AS1 executed its function
in cervical cancer and thus provided potential therapeutic targets for the
disease.
Collapse
Affiliation(s)
- Linlin Song
- Department of Gynecology, The General Hospital of Ningxia Medical University, Yinchuan, China
| | - Linlin Wang
- Medical Laboratory Center, The General Hospital of Ningxia Medical University, Yinchuan, China
| | - Xiaoli Pan
- Department of Pathology, The General Hospital of Ningxia Medical University, Yinchuan, China
| | - Caihong Yang
- Department of Gynecology, The General Hospital of Ningxia Medical University, Yinchuan, China
| |
Collapse
|
8
|
Chava S, Reynolds CP, Pathania AS, Gorantla S, Poluektova LY, Coulter DW, Gupta SC, Pandey MK, Challagundla KB. miR-15a-5p, miR-15b-5p, and miR-16-5p inhibit tumor progression by directly targeting MYCN in neuroblastoma. Mol Oncol 2019; 14:180-196. [PMID: 31637848 PMCID: PMC6944109 DOI: 10.1002/1878-0261.12588] [Citation(s) in RCA: 88] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 09/17/2019] [Accepted: 10/21/2019] [Indexed: 01/15/2023] Open
Abstract
Neuroblastoma (NB) is the most common extracranial solid malignancy in children. Despite current aggressive treatment regimens, the prognosis for high-risk NB patients remains poor, with the survival of less than 40%. Amplification/stabilization of MYCN oncogene, in NB is associated with a high risk of recurrence. Thus, there is an urgent need for novel therapeutics. The deregulated expression of microRNA (miR) is reported in NB; nonetheless, its effect on MYCN regulation is poorly understood. First, we identified that miR-15a-5p, miR-15b-5p, and miR-16-5p (hereafter miR-15a, miR-15b or miR-16) were down-regulated in patient-derived xenografts (PDX) with high MYCN expression. MiR targeting sequences on MYCN mRNA were predicted using online databases such as TargetScan and miR database. The R2 database, containing 105 NB patients, showed an inverse correlation between MYCN mRNA and deleted in lymphocytic leukemia (DLEU) 2, a host gene of miR-15. Moreover, overexpression of miR-15a, miR-15b or miR-16 significantly reduced the levels of MYCN mRNA and N-Myc protein. Conversely, inhibiting miR dramatically enhanced MYCN mRNA and N-Myc protein levels, as well as increasing mRNA half-life in NB cells. By performing immunoprecipitation assays of argonaute-2 (Ago2), a core component of the RNA-induced silencing complex, we showed that miR-15a, miR-15b and miR-16 interact with MYCN mRNA. Luciferase reporter assays showed that miR-15a, miR-15b and miR-16 bind with 3'UTR of MYCN mRNA, resulting in MYCN suppression. Moreover, induced expression of miR-15a, miR-15b and miR-16 significantly reduced the proliferation, migration, and invasion of NB cells. Finally, transplanting miR-15a-, miR-15b- and miR-16-expressing NB cells into NSG mice repressed tumor formation and MYCN expression. These data suggest that miR-15a, miR-15b and miR-16 exert a tumor-suppressive function in NB by targeting MYCN. Therefore, these miRs could be considered as potential targets for NB treatment.
Collapse
Affiliation(s)
- Srinivas Chava
- Department of Biochemistry and Molecular Biology & the Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA
| | - C Patrick Reynolds
- Childhood Cancer Repository, Texas Tech University Health Sciences Center, Lubbock, TX, USA
| | - Anup S Pathania
- Department of Biochemistry and Molecular Biology & the Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA
| | - Santhi Gorantla
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Larisa Y Poluektova
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
| | - Don W Coulter
- Department of Pediatrics, Division of Hematology/Oncology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Subash C Gupta
- Department of Biochemistry, Institute of Science, Banaras Hindu University, Uttar Pradesh, India
| | - Manoj K Pandey
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, NJ, USA
| | - Kishore B Challagundla
- Department of Biochemistry and Molecular Biology & the Fred and Pamela Buffett Cancer Center, University of Nebraska Medical Center, Omaha, NE, USA
| |
Collapse
|
9
|
Wang M, Sun X, Yang Y, Jiao W. Long non-coding RNA OIP5-AS1 promotes proliferation of lung cancer cells and leads to poor prognosis by targeting miR-378a-3p. Thorac Cancer 2018; 9:939-949. [PMID: 29897167 PMCID: PMC6068457 DOI: 10.1111/1759-7714.12767] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 04/23/2018] [Accepted: 04/23/2018] [Indexed: 01/09/2023] Open
Abstract
Background The antisense of the OIP5‐AS1 gene is a long non‐coding RNA (lncRNA) that is reported to be upregulated and promotes cell proliferation in multiple human cancers; however, its function in lung cancer is unknown. We investigated the regulatory function and underlying mechanisms of OIP5‐AS1 in lung cancer. Methods OIP5‐AS1 and microRNA (miR)‐378a‐3p expression were assayed by quantitative real‐time PCR, and proliferation‐related protein expression was measured by Western blotting. Cell viability was detected using methyl thiazolyl tetrazolium assay. Luciferase reporter assay and RNA immunoprecipitation were used to detect the direct regulation of miR‐378a‐3p by OIP5‐AS1. Nude mice were used to test the function of OIP5‐AS1 in vivo. Results OIP5‐AS1 was highly expressed in lung cancer tissues and was correlated with tumor size and tumor growth speed. OIP5‐AS1 overexpression increased lung cancer cell proliferation in vitro. Further investigation revealed that OIP5‐AS1 functions as a competing endogenous RNA of miR‐378a‐3p. MiR‐378a‐3p overexpression inhibited cell proliferation and caused proliferation‐associated proteins CDK4 and CDK6 to decrease in A549 cells. Overexpression of wild type OIP5‐AS1 led to strong CDK4 and CDK6 expression; however, these two proteins did not change when mutated OIP5‐AS1 was upregulated. Finally, in vivo assay showed that the speed of tumor growth was increased and decreased when OIP5‐AS1 was upregulated and downregulated, respectively. Conclusion Our results revealed that OIP5‐AS1 acts as a growth‐promoting lncRNA in lung cancer by suppressing miR‐378a‐3p function. OIP5‐AS1 and miR‐378a‐3p interaction may provide a potential target for lung cancer treatment.
Collapse
Affiliation(s)
- Maolong Wang
- Department of Thoracic Surgery, Affiliated Hospital, Qingdao University, Qingdao, China
| | - Xiao Sun
- Department of Thoracic Surgery, Affiliated Hospital, Qingdao University, Qingdao, China
| | - Yuling Yang
- Department of Infectious Disease, Affiliated Hospital, Qingdao University, Qingdao, China
| | - Wenjie Jiao
- Department of Thoracic Surgery, Affiliated Hospital, Qingdao University, Qingdao, China
| |
Collapse
|