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Liu J, Tan X, Li L, Cao L, Zhou Y, Li H, Peng T. Protein expression of nucleolar protein 12 in the retina and its implication in protection of retina from UV irradiation damage. Cell Death Discov 2024; 10:130. [PMID: 38467618 PMCID: PMC10928217 DOI: 10.1038/s41420-024-01902-x] [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: 06/27/2023] [Revised: 01/28/2024] [Accepted: 02/29/2024] [Indexed: 03/13/2024] Open
Abstract
Nucleolar protein 12 (NOL12), one of the nucleolar proteins which are primarily expressed in the nucleolus and play key roles in RNA metabolism, cell proliferation, cell cycle, and cell survival, is widely expressed in various species and multiple organs. Although it has been reported that the mRNA of Drosophila NOL12 homolog viriato is expressed in the eyes of Drosophila, the protein expression of NOL12 in mammalian eyes remains to be elucidated. In this study, we showed through immunohistochemistry that NOL12 was present in the rat retina, with predominant distribution in the cytoplasm of the retinal neuronal cells. In the human retinoblastoma cell line WERI-Rb1, we found that altering NOL12 expression led to a change in WERI-Rb1 cell viability. Knocking down NOL12 expression decreased cell viability. In contrast, overexpressing NOL12 increased cell viability. Furthermore, increasing NOL12 expression inhibited ultraviolet (UV)-induced apoptosis. These findings demonstrated that NOL12 may play an important protective role in retinal cells. In the WERI-Rb1 cells exposed to UV irradiation, we detected that NOL12 was degraded, but this degradation could be attenuated by a pan-Caspase inhibitor. Notably, the inhibitory effect of NOL12 against UV-induced apoptosis could be restrained by increasing the expression of ATR serine/threonine kinase (ATR), a kinase that, when activated by severe DNA damage, can result in apoptosis. We also found that upregulating NOL12 inhibited the activation of ATR caused by UV irradiation. Additionally, inhibiting ATR activity reduced apoptosis resulting from both silencing NOL12 expression and UV exposure. Thus, NOL12 may protect against UV irradiation-induced retinal damage by inhibiting ATR activity.
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Affiliation(s)
- Jingtao Liu
- Department of Histology and Embryology, School of Basic Medical Sciences, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
- Department of Histology and Embryology, Hubei University of Medicine, Shiyan, 442000, People's Republic of China
| | - Xiaomei Tan
- Department of Histology and Embryology, School of Basic Medical Sciences, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
| | - Li Li
- Department of Critical Care Medicine, Zhongnan Hospital of Wuhan University, Wuhan, 430071, People's Republic of China
| | - Liying Cao
- Department of Histology and Embryology, School of Basic Medical Sciences, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
| | - Yan Zhou
- Department of Histology and Embryology, School of Basic Medical Sciences, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
| | - He Li
- Department of Histology and Embryology, School of Basic Medical Sciences, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China.
- Department of Histology and Embryology, Hubei University of Medicine, Shiyan, 442000, People's Republic of China.
- Department of Histology and Embryology, School of Medicine, Yunnan University, Kunming, 650091, People's Republic of China.
| | - Ting Peng
- Department of Histology and Embryology, School of Basic Medical Sciences, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China.
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Hossain MN, Gao Y, Hatfield MJ, de Avila JM, McClure MC, Du M. Cold exposure impacts DNA methylation patterns in cattle sperm. Front Genet 2024; 15:1346150. [PMID: 38444759 PMCID: PMC10912962 DOI: 10.3389/fgene.2024.1346150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 01/23/2024] [Indexed: 03/07/2024] Open
Abstract
DNA methylation is influenced by various exogenous factors such as nutrition, temperature, toxicants, and stress. Bulls from the Pacific Northwest region of the United States and other northern areas are exposed to extreme cold temperatures during winter. However, the effects of cold exposure on the methylation patterns of bovine sperm remain unclear. To address, DNA methylation profiles of sperm collected during late spring and winter from the same bulls were analyzed using whole genome bisulfite sequencing (WGBS). Bismark (0.22.3) were used for mapping the WGBS reads and R Bioconductor package DSS was used for differential methylation analysis. Cold exposure induced 3,163 differentially methylated cytosines (DMCs) with methylation difference ≥10% and a q-value < 0.05. We identified 438 differentially methylated regions (DMRs) with q-value < 0.05, which overlapped with 186 unique genes. We also identified eight unique differentially methylated genes (DMGs) (Pax6, Macf1, Mest, Ubqln1, Smg9, Ctnnb1, Lsm4, and Peg10) involved in embryonic development, and nine unique DMGs (Prmt6, Nipal1, C21h15orf40, Slc37a3, Fam210a, Raly, Rgs3, Lmbr1, and Gan) involved in osteogenesis. Peg10 and Mest, two paternally expressed imprinted genes, exhibited >50% higher methylation. The differential methylation patterns of six distinct DMRs: Peg10, Smg9 and Mest related to embryonic development and Lmbr1, C21h15orf40 and Prtm6 related to osteogenesis, were assessed by methylation-specific PCR (MS-PCR), which confirmed the existence of variable methylation patterns in those locations across the two seasons. In summary, cold exposure induces differential DNA methylation patterns in genes that appear to affect embryonic development and osteogenesis in the offspring. Our findings suggest the importance of replicating the results of the current study with a larger sample size and exploring the potential of these changes in affecting offspring development.
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Affiliation(s)
- Md Nazmul Hossain
- Nutrigenomics and Growth Biology Laboratory, Department of Animal Sciences, Washington State University, Pullman, WA, United States
- Department of Livestock Production and Management, Faculty of Veterinary, Animal, and Biomedical Sciences, Sylhet Agricultural University, Sylhet, Bangladesh
| | - Yao Gao
- Nutrigenomics and Growth Biology Laboratory, Department of Animal Sciences, Washington State University, Pullman, WA, United States
| | - Michael J. Hatfield
- Nutrigenomics and Growth Biology Laboratory, Department of Animal Sciences, Washington State University, Pullman, WA, United States
| | - Jeanene M. de Avila
- Nutrigenomics and Growth Biology Laboratory, Department of Animal Sciences, Washington State University, Pullman, WA, United States
| | | | - Min Du
- Nutrigenomics and Growth Biology Laboratory, Department of Animal Sciences, Washington State University, Pullman, WA, United States
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Lee JW, Mun H, Kim JH, Ko S, Kim YK, Shim MJ, Kim K, Ho CW, Park HB, Kim M, Lee C, Choi SH, Kim JW, Jeong JH, Yoon JH, Min KW, Son TG. Low-Dose Ionizing Radiation-Crosslinking Immunoprecipitation (LDIR-CLIP) Identified Irradiation-Sensitive RNAs for RNA-Binding Protein HuR-Mediated Decay. BIOLOGY 2023; 12:1533. [PMID: 38132359 PMCID: PMC10740889 DOI: 10.3390/biology12121533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/25/2023] [Accepted: 12/13/2023] [Indexed: 12/23/2023]
Abstract
Although ionizing radiation (IR) is widely used for therapeutic and research purposes, studies on low-dose ionizing radiation (LDIR) are limited compared with those on other IR approaches, such as high-dose gamma irradiation and ultraviolet irradiation. High-dose IR affects DNA damage response and nucleotide-protein crosslinking, among other processes; however, the molecular consequences of LDIR have been poorly investigated. Here, we developed a method to profile RNA species crosslinked to an RNA-binding protein, namely, human antigen R (HuR), using LDIR and high-throughput RNA sequencing. The RNA fragments isolated via LDIR-crosslinking and immunoprecipitation sequencing were crosslinked to HuR and protected from RNase-mediated digestion. Upon crosslinking HuR to target mRNAs such as PAX6, ZFP91, NR2F6, and CAND2, the transcripts degraded rapidly in human cell lines. Additionally, PAX6 and NR2F6 downregulation mediated the beneficial effects of LDIR on cell viability. Thus, our approach provides a method for investigating post-transcriptional gene regulation using LDIR.
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Affiliation(s)
- Ji Won Lee
- Department of Biology, College of Natural Sciences, Gangneung-Wonju National University, Gangneung-si 25457, Republic of Korea; (J.W.L.); (M.J.S.); (K.K.); (C.W.H.); (H.B.P.)
| | - Hyejin Mun
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA; (H.M.); (S.K.); (J.-H.Y.)
- Department of Oncology Science, University of Oklahoma, Oklahoma City, OK 73104, USA;
| | - Jeong-Hyun Kim
- Department of Medicine, University of Ulsan College of Medicine, Seoul 05505, Republic of Korea;
| | - Seungbeom Ko
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA; (H.M.); (S.K.); (J.-H.Y.)
| | - Young-Kook Kim
- Biomedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun 58128, Republic of Korea;
- Department of Biochemistry, Chonnam National University Medical School, Hwasun 58128, Republic of Korea
| | - Min Ji Shim
- Department of Biology, College of Natural Sciences, Gangneung-Wonju National University, Gangneung-si 25457, Republic of Korea; (J.W.L.); (M.J.S.); (K.K.); (C.W.H.); (H.B.P.)
| | - Kyungmin Kim
- Department of Biology, College of Natural Sciences, Gangneung-Wonju National University, Gangneung-si 25457, Republic of Korea; (J.W.L.); (M.J.S.); (K.K.); (C.W.H.); (H.B.P.)
| | - Chul Woong Ho
- Department of Biology, College of Natural Sciences, Gangneung-Wonju National University, Gangneung-si 25457, Republic of Korea; (J.W.L.); (M.J.S.); (K.K.); (C.W.H.); (H.B.P.)
| | - Hyun Bong Park
- Department of Biology, College of Natural Sciences, Gangneung-Wonju National University, Gangneung-si 25457, Republic of Korea; (J.W.L.); (M.J.S.); (K.K.); (C.W.H.); (H.B.P.)
| | - Meesun Kim
- Research Center, Dongnam Institute of Radiological and Medical Science, Busan 46033, Republic of Korea; (M.K.); (C.L.); (S.H.C.)
| | - Chaeyoung Lee
- Research Center, Dongnam Institute of Radiological and Medical Science, Busan 46033, Republic of Korea; (M.K.); (C.L.); (S.H.C.)
| | - Si Ho Choi
- Research Center, Dongnam Institute of Radiological and Medical Science, Busan 46033, Republic of Korea; (M.K.); (C.L.); (S.H.C.)
| | - Jung-Woong Kim
- Department of Life Science, College of Natural Sciences, Chung-Ang University, Seoul 06974, Republic of Korea;
| | - Ji-Hoon Jeong
- Department of Oncology Science, University of Oklahoma, Oklahoma City, OK 73104, USA;
| | - Je-Hyun Yoon
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA; (H.M.); (S.K.); (J.-H.Y.)
- Department of Oncology Science, University of Oklahoma, Oklahoma City, OK 73104, USA;
| | - Kyung-Won Min
- Department of Biology, College of Natural Sciences, Gangneung-Wonju National University, Gangneung-si 25457, Republic of Korea; (J.W.L.); (M.J.S.); (K.K.); (C.W.H.); (H.B.P.)
| | - Tae Gen Son
- Research Center, Dongnam Institute of Radiological and Medical Science, Busan 46033, Republic of Korea; (M.K.); (C.L.); (S.H.C.)
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Ripa R, Ballhysa E, Steiner JD, Laboy R, Annibal A, Hochhard N, Latza C, Dolfi L, Calabrese C, Meyer AM, Polidori MC, Müller RU, Antebi A. Refeeding-associated AMPK γ1 complex activity is a hallmark of health and longevity. NATURE AGING 2023; 3:1544-1560. [PMID: 37957359 PMCID: PMC10724066 DOI: 10.1038/s43587-023-00521-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Accepted: 10/05/2023] [Indexed: 11/15/2023]
Abstract
Late-life-initiated dietary interventions show limited efficacy in extending longevity or mitigating frailty, yet the underlying causes remain unclear. Here we studied the age-related fasting response of the short-lived killifish Nothobranchius furzeri. Transcriptomic analysis uncovered the existence of a fasting-like transcriptional program in the adipose tissue of old fish that overrides the feeding response, setting the tissue in persistent metabolic quiescence. The fasting-refeeding cycle triggers an inverse oscillatory expression of genes encoding the AMP-activated protein kinase (AMPK) regulatory subunits Prkag1 (γ1) and Prkag2 (γ2) in young individuals. Aging blunts such regulation, resulting in reduced Prkag1 expression. Transgenic fish with sustained AMPKγ1 countered the fasting-like transcriptional program, exhibiting a more youthful feeding and fasting response in older age, improved metabolic health and longevity. Accordingly, Prkag1 expression declines with age in human tissues and is associated with multimorbidity and multidimensional frailty risk. Thus, selective activation of AMPKγ1 prevents metabolic quiescence and preserves healthy aging in vertebrates, offering potential avenues for intervention.
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Affiliation(s)
- Roberto Ripa
- Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Eugen Ballhysa
- Max Planck Institute for Biology of Ageing, Cologne, Germany
- Cologne Graduate School for Ageing Research (CGA), Cologne, Germany
| | - Joachim D Steiner
- Max Planck Institute for Biology of Ageing, Cologne, Germany
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
| | - Raymond Laboy
- Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Andrea Annibal
- Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Nadine Hochhard
- Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Christian Latza
- Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Luca Dolfi
- Max Planck Institute for Biology of Ageing, Cologne, Germany
| | - Chiara Calabrese
- Max Planck Institute for Biology of Ageing, Cologne, Germany
- Cologne Graduate School for Ageing Research (CGA), Cologne, Germany
| | - Anna M Meyer
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
| | - Maria Cristina Polidori
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Roman-Ulrich Müller
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany
| | - Adam Antebi
- Max Planck Institute for Biology of Ageing, Cologne, Germany.
- Cologne Graduate School for Ageing Research (CGA), Cologne, Germany.
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne, Germany.
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5
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An D, Yang J, Ma L. circRNF20 aggravates the malignancy of retinoblastoma depending on the regulation of miR-132-3p/PAX6 axis. Open Med (Wars) 2022; 17:955-968. [PMID: 35663593 PMCID: PMC9135067 DOI: 10.1515/med-2022-0483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 04/20/2022] [Accepted: 04/22/2022] [Indexed: 11/27/2022] Open
Abstract
Circular RNAs (circRNAs) serve as essential players in diverse human cancers, including retinoblastoma (RB). In this study, the function of circRNA Ring Finger Protein 20 (circRNF20) in RB progression was investigated. Quantitative real-time polymerase chain reaction, western blot assay or immunohistochemistry assay was performed to determine the expression of circRNF20, miR-132-3p and Paired Box 6 (PAX6). Dual-luciferase reporter assay, RNA immunoprecipitation assay and RNA pull-down assay were utilized to verify the relationships among circRNF20, miR-132-3p and PAX6. In vivo experiment was done for circRNF20 function in tumor formation. It was found that ircRNF20 level was increased in RB tissues and linked to advanced tumor, nodes, metastases (TNM) stage and poor overall survival rate. Deficiency of circRNF20 suppressed cell proliferation, migration and invasion and induced apoptosis in vitro, as well as blocked tumor growth in vivo. circRNF20 directly targeted miR-132-3p and miR-132-3p overexpression inhibited RB cell progression. PAX6 was the target gene of miR-132-3p. Moreover, miR-132-3p inhibition or PAX6 overexpression reversed circRNF20 deficiency-mediated effects on RB cell malignant behaviors. In addition, exosomal circRNF20 was able to promote RB cell progression. Thus, we concluded that circRNF20 served as an oncogene in RB progression through the circRNF20/miR-132-3p/PAX6 pathway.
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Affiliation(s)
- Dexiang An
- Department of Ophthalmology, Lianyungang Maternal and Child Health Hospital, Lianyungang, Jiangsu Province, People's Republic of China
| | - Jing Yang
- Department of Pharmacy, Lianyungang Maternal and Child Health Hospital, Lianyungang, People's Republic of China
| | - Linli Ma
- Department of Ophthalmology, The Second People's Hospital of Lianyungang, No. 41 Hailian Dong Road, Haizhou District, Lianyungang 222000, People's Republic of China.,Department of Ophthalmology, The Oncology Hospital of Lianyungang, No. 41 Hailian Dong Road, Haizhou District, Lianyungang 222000, Jiangsu Province, People's Republic of China
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Wang Z, Chen N, Liu C, Cao G, Ji Y, Yang W, Jiang Q. UBE2T is a prognostic biomarker and correlated with Th2 cell infiltrates in retinoblastoma. Biochem Biophys Res Commun 2022; 614:138-144. [PMID: 35594577 DOI: 10.1016/j.bbrc.2022.04.096] [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: 04/15/2022] [Accepted: 04/21/2022] [Indexed: 11/30/2022]
Abstract
OBJECTIVE This study aimed to screen anaplasia-related genes that influence the progression of retinoblastoma (RB) and to identify immune cells associated with the poor prognosis. METHODS Differentially expressed genes (DEGs) between retina and RB samples were acquired from gene expression omnibus (GEO) database. Candidate hub genes were screened by taking intersections among the co-expressed genes, the hub nodes, and DEGs of the validation set. The hub genes were identified by receiver operating characteristic (ROC) and quantitative real-time PCR (qPCR). Immune infiltration levels of RB tissues were estimated using single-sample gene set enrichment analysis (ssGSEA). The functions of RB cells were detected by CCK8, EDU and flow cytometry assays. RESULTS 665 DEGs involved in the genesis and progression of RB were acquired from GEO database. 29 candidate hub genes were screened by examining 43 co-expressed genes and 63 hub nodes. 9 hub genes (CHEK1, EXO1, FANCI, GTSE1, MELK, MKI67, NCAPH, PRC1, and UBE2T) strongly related to the anaplastic grades were validated by ROC curve analysis (AUC >0.8). Based on the ssGSEA scores, the immune infiltration levels of Th2 cells were positively associated with anaplastic grade. qPCR assay showed that 9 hub genes were upregulated in RB cells, and UBE2T expressed remarkably high. CCK 8, EDU, and flow cytometry assays revealed that UBE2T silencing inhibited the proliferation of RB cells and incited apoptosis. CONCLUSIONS The increased infiltration of Th2 cells and upregulated expression of 9 hub genes predict a poor prognosis of RB. UBE2T can be a therapeutic target for RB treatment.
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Affiliation(s)
- Zhenzhen Wang
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Nan Chen
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Chang Liu
- Shanghai Medical College, Eye and ENT Hospital, Fudan University, Shanghai, China
| | - Guofan Cao
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Yuke Ji
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China
| | - Weihua Yang
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China.
| | - Qin Jiang
- The Fourth School of Clinical Medicine, The Affiliated Eye Hospital, Nanjing Medical University, Nanjing, China.
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Lu X, Tu H, Tang D, Huang X, Sun F. miR-130a-3p Enhances the Chemosensitivity of Y79 Retinoblastoma Cells to Vincristine by Targeting PAX6 Expression. Curr Eye Res 2021; 47:418-425. [PMID: 34547965 DOI: 10.1080/02713683.2021.1984537] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
PURPOSE Chemoresistance remains the primary obstacle threatening the prognosis of retinoblastoma (RB). microRNAs (miRNAs) are acknowledged as critical regulators of drug resistance. This study explored the molecular mechanism of miR-130a-3p affecting the chemosensitivity of RB to vincristine (VCR). METHODS miR-130a-3p expression of human retinal astrocytes and RB cell lines (Y79, WERI-Rb-1, SO-Rb50, and SO-Rb70) was detected using RT-qPCR. VCR-resistant RB cell line Y79/VCR was induced. miR-130a-3p expression of Y79/VCR cell line and its corresponding parental cell line was detected. Y79/VCR cells were subjected to miR-130a-3p overexpression treatment. The cell proliferation was measured using MTT assay, and the IC50 value and drug resistance index were examined using CCK-8 assay. The targeting relationship between miR-130a-3p and PAX6 was predicted through bioinformatics analysis and verified using dual-luciferase assay. Functional rescue experiments were conducted to confirm the role of PAX6 in chemosensitivity of RB cells. The effect of miR-130a-3p on tumorigenesis and VCR sensitivity was observed in vivo. RESULTS miR-130a-3p was downregulated in VCR-resistant RB cells. Overexpression of miR-130a-3p repressed the proliferation of Y79/VCR cells and enhanced chemosensitivity. miR-130a-3p targeted PAX6 expression. Overexpression of PAX6 reversed the effect of miR-130a-3p on chemosensitivity of Y79/VCR cells. Overexpression of miR-130a-3p suppressed tumor growth and reduced VCR resistance in vivo. CONCLUSIONS miR-130a-3p enhanced the chemosensitivity of Y79 RB cells to VCR by targeting PAX6 expression.
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Affiliation(s)
- Xiulan Lu
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Huifang Tu
- Eyelid and Ocular Disease Department, Wuhan Aier Eye Hospital of Wuhan University, Wuhan, China
| | - Dongrun Tang
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Xiaoming Huang
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
| | - Fengyuan Sun
- Tianjin Key Laboratory of Retinal Functions and Diseases, Tianjin Branch of National Clinical Research Center for Ocular Disease, Eye Institute and School of Optometry, Tianjin Medical University Eye Hospital, Tianjin, China
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Liu Z, Han L, Yu H, Gao N, Xin H. LINC01619 promotes non-small cell lung cancer development via regulating PAX6 by suppressing microRNA-129-5p. Am J Transl Res 2020; 12:2538-2553. [PMID: 32655789 PMCID: PMC7344070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Accepted: 04/24/2020] [Indexed: 06/11/2023]
Abstract
This article explored LINC01619 impact on non-small cell lung cancer (NSCLS) development. LINC01619 expression in tumor tissues/normal tissues of NSCLS patients was detected by qRT-PCR and in situ hybridization. PAX6 expression in clinical tissues was researched by immunohistochemistry. After transfection, SPCA1 and A549 cells were subjected to CCK-8 assay and cell colony formation experiment. Xenograft tumor experiment was conducted. ALDH+ cells from SPCA1 and A549 cells were separated and transfected. ALDH+ cells percentage, sphere number and cancer stem cell markers expression was determined by flow cytometry, sphere culture and Western blot respectively. Luciferase reporter gene assay and RNA binding protein immunoprecipitation assay was conducted. The colocalization of LINC01619 and miR-129-5p in cells was determined by RNA fluorescence in situ hybridization experiment. Gene expression in tissues and cells were assessed by qRT-PCR and Western blot. As a result, aberrantly up-regulated LINC01619 and PAX6 in NSCLC patients predicted poor prognosis. LINC01619 overexpression in SPCA1 cells enhanced cell viability, cloning ability, and xenograft tumors volume and weigh, whereas LINC01619 silencing in A549 cells weakened the above indicators. LINC01619 overexpression promoted cancer stem cells characteristics including increasing percentage of ALDH+ cells, sphere number and cancer stem cell markers expression. LINC01619 directly inhibited miR-129-5p and the two genes were mainly colocalized in the cytoplasm. PAX6 was up-regulated in NSCLC and directly suppressed by miR-129-5p. LINC01619 promoted cells viability, cloning ability and cancer stem cells characteristics in NSCLC via the miR-129-5p/PAX6 axis. Thus, LINC01619 promotes NSCLC development via regulating PAX6 by suppressing miR-129-5p.
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Affiliation(s)
- Zhengjia Liu
- Department of Thoracic Surgery, China-Japan Union Hospital of Jilin University Changchun 130033, Jilin Province, P. R. China
| | - Leng Han
- Department of Thoracic Surgery, China-Japan Union Hospital of Jilin University Changchun 130033, Jilin Province, P. R. China
| | - Haixiang Yu
- Department of Thoracic Surgery, China-Japan Union Hospital of Jilin University Changchun 130033, Jilin Province, P. R. China
| | - Nan Gao
- Department of Thoracic Surgery, China-Japan Union Hospital of Jilin University Changchun 130033, Jilin Province, P. R. China
| | - Hua Xin
- Department of Thoracic Surgery, China-Japan Union Hospital of Jilin University Changchun 130033, Jilin Province, P. R. China
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9
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Wang Q, Zhu Y, Zuo G, Chen X, Cheng J, Zhang S. LINC00858 promotes retinoblastoma cell proliferation, migration and invasion by inhibiting miR-3182. Exp Ther Med 2019; 19:999-1005. [PMID: 32010262 PMCID: PMC6966175 DOI: 10.3892/etm.2019.8294] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Accepted: 10/02/2019] [Indexed: 01/13/2023] Open
Abstract
The aim of the present study was to determine the role of long intergenic non-protein coding RNA 858 (LINC00858) in retinoblastoma (RB) and investigate the underlying molecular mechanisms. RB tissues and paracancerous tissues of 27 RB cases were obtained. RB cell lines (SO-RB50, Y79, HXO-RB44 and WERI-Rb1) and a normal retinal epithelial cell line (ARPE-19) were cultured for in vitro experiments. Batches of SO-RB50 and Y79 cells were assigned to groups transfected with small interfering RNA targeting LINC00858 (si-LINC00858 group), microRNA (miR)-3182 mimics or inhibitor, or the respective controls. A Cell Counting Kit-8 and Transwell assays were performed to assess the effect of the transfections on the proliferation, migration and invasion of SO-RB50 and Y79 cells. A luciferase reporter assay was performed using SO-RB50 cells to demonstrate the direct binding of LINC00858 and miR-3182. Reverse transcription-quantitative PCR was employed to detect LINC00858 and miR-3182 expression. Pearson correlation analysis was used to assess the correlation between the expression of LINC00858 and miR-3182. The results indicated that RB tissues and cells exhibited aberrantly elevated LINC00858 expression (P<0.05). Compared with those in the control-transfected group, SO-RB50 and Y79 cells of the si-LINC00858 group had a lower cell proliferation, as well as a lower number of migrated and invaded cells (all P<0.05). miR-3182 was proven to be a target gene of LINC00858, to be abnormally downregulated in RB tissues and cells (P<0.05) and to be negatively correlated with LINC00858 expression. Compared with those in the si-LINC00858 + inhibitor-negative control group, SO-RB50 and Y79 cells of the si-LINC00858 + miR-3182 inhibitor group exhibited a significantly higher relative proliferation, migration and invasion (all P<0.05). In conclusion, LINC00858 promoted RB cell proliferation, migration and invasion, at least partially by inhibiting miR-3182.
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Affiliation(s)
- Qi Wang
- Department of Ophthalmology, The First Affiliated Hospital of Yangtze University, Jingzhou, Hubei 434000, P.R. China
| | - Yanni Zhu
- Department of Ophthalmology, The First Affiliated Hospital of Yangtze University, Jingzhou, Hubei 434000, P.R. China
| | - Guojin Zuo
- Department of Ophthalmology, The First Affiliated Hospital of Yangtze University, Jingzhou, Hubei 434000, P.R. China
| | - Xiaoming Chen
- Department of Ophthalmology, The First Affiliated Hospital of Yangtze University, Jingzhou, Hubei 434000, P.R. China
| | - Jinkui Cheng
- Department of Ophthalmology, The First Affiliated Hospital of Yangtze University, Jingzhou, Hubei 434000, P.R. China
| | - Shu Zhang
- Department of Ophthalmology, The First Affiliated Hospital of Yangtze University, Jingzhou, Hubei 434000, P.R. China
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10
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Zhang S, Wang Q, Li D, Huang B, Hou X, Wang D. MicroRNA‑509 targets PAX6 to inhibit cell proliferation and invasion in papillary thyroid carcinoma. Mol Med Rep 2018; 19:1403-1409. [PMID: 30569166 DOI: 10.3892/mmr.2018.9750] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Accepted: 09/28/2018] [Indexed: 11/05/2022] Open
Abstract
MicroRNAs (miRNAs/miRs) negatively regulate the expression of numerous genes and therefore contribute to the occurrence and development of papillary thyroid carcinoma (PTC). Hence, further investigation into the specific roles of miRNAs in PTC is valuable for developing effective therapeutic methods for patients with this disease. MiRNA‑509 is dysregulated and serves pivotal roles in several types of human cancer; however, the expression and roles of miR‑509 in PTC and its underlying mechanism require further investigation. In the present study, the expression of miR‑509 in PTC tissues and cell lines was detected and the specific functions of miR‑509 in the progression of PTC were investigated. Additionally, the molecular mechanisms underlying the action of miR‑509 in PTC were determined. The present study demonstrated that miR‑509 was significantly downregulated in PTC tissues and cell lines. MiR‑509 upregulation inhibited the PTC cell proliferation and invasion. Mechanistically, paired box 6 (PAX6) was identified as a novel target of miR‑509 in PTC cells. In clinical PTC samples, miR‑509 was significantly overexpressed and inversely correlated with PAX6 expression. PAX6 restoration effectively reversed the inhibitory effects of miR‑509 overexpression on PTC cell proliferation and invasion. These results demonstrated that miR‑509 may act as a tumor suppressor in PTC by directly targeting PAX6. Thus, miR‑509 may be a potential therapeutic target for the treatment of patients with PTC.
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Affiliation(s)
- Shuilong Zhang
- Department of Thyroid Surgery, Shanxi Provincial People's Hospital, Taiyuan, Shanxi 030012, P.R. China
| | - Qiang Wang
- Department of Thyroid Surgery, Shanxi Provincial People's Hospital, Taiyuan, Shanxi 030012, P.R. China
| | - Dewei Li
- Department of Thyroid Surgery, Shanxi Provincial People's Hospital, Taiyuan, Shanxi 030012, P.R. China
| | - Bo Huang
- Department of Gastrointestinal Pancreas, Hernia and Abdominal Wall Surgery, Shanxi Provincial People's Hospital, Taiyuan, Shanxi 030012, P.R. China
| | - Xia Hou
- Department of Chest Radiotherapy, Tumor Hospital of Shanxi Province, Taiyuan, Shanxi 030012, P.R. China
| | - Dongliang Wang
- Department of Thyroid Surgery, Shanxi Provincial People's Hospital, Taiyuan, Shanxi 030012, P.R. China
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11
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Ibañez Rodriguez MP, Galiana MD, Rásmussen JA, Freites CL, Noctor SC, Muñoz EM. Differential response of pineal microglia to surgical versus pharmacological stimuli. J Comp Neurol 2018; 526:2462-2481. [PMID: 30246867 DOI: 10.1002/cne.24505] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 07/18/2018] [Accepted: 07/19/2018] [Indexed: 12/17/2022]
Abstract
Microglial cells are one of the interstitial elements of the pineal gland (PG). We recently reported the pattern of microglia colonization and activation, and microglia-Pax6+ cell interactions during normal pineal ontogeny. Here, we describe the dynamics of microglia-Pax6+ cell associations and interactions after surgical or pharmacological manipulation. In adult rats, the superior cervical ganglia (SCG) were exposed, and either bilaterally excised (SCGx) or decentralized (SCGd). In the SCGx PGs, the density of Iba1+ microglia increased after surgery and returned to sham baseline levels 13 days later. Pineal microglia also responded to SCGd, a more subtle denervation. The number of clustered Iba1+ /PCNA+ /ED1+ microglia was higher 4 days after both surgeries compared to the sham-operated group. However, the number of Pax6+ /PCNA- cells and the percentage of Pax6+ cells contacted by and/or phagocytosed by microglia increased significantly only after SCGx. Separate groups of rats were treated with either bacterial lipopolysaccharides (LPS) or doxycycline (DOX) to activate or inhibit pineal microglia, respectively. Peripheral LPS administration caused an increase in the number of clustered Iba1+ /PCNA+ /ED1+ microglial cells, and in the percentage of Pax6+ cells associated with and/or engulfed by microglia. In the LPS-treated PGs, we also noted an increase in the number of PCNA+ cells that were Iba1- within the microglial cell clusters. The density of Pax6+ cells did not change after LPS treatment. DOX administration did not influence the parameters analyzed. These data suggest that pineal microglia are highly receptive cells capable of rapidly responding in a differential manner to surgical and pharmacological stimuli.
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Affiliation(s)
- María P Ibañez Rodriguez
- Institute of Histology and Embryology of Mendoza (IHEM), National University of Cuyo, National Scientific and Technical Research Council (CONICET), Mendoza, Argentina
| | - María D Galiana
- Institute of Histology and Embryology of Mendoza (IHEM), National University of Cuyo, National Scientific and Technical Research Council (CONICET), Mendoza, Argentina
| | - Jorge A Rásmussen
- Institute of Histology and Embryology of Mendoza (IHEM), National University of Cuyo, National Scientific and Technical Research Council (CONICET), Mendoza, Argentina
| | - Carlos L Freites
- Institute of Histology and Embryology of Mendoza (IHEM), National University of Cuyo, National Scientific and Technical Research Council (CONICET), Mendoza, Argentina
| | - Stephen C Noctor
- Department of Psychiatry and Behavioral Sciences, MIND Institute, University of California, Davis, School of Medicine Sacramento, California
| | - Estela M Muñoz
- Institute of Histology and Embryology of Mendoza (IHEM), National University of Cuyo, National Scientific and Technical Research Council (CONICET), Mendoza, Argentina
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12
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Generation of a PAX6 knockout glioblastoma cell line with changes in cell cycle distribution and sensitivity to oxidative stress. BMC Cancer 2018; 18:496. [PMID: 29716531 PMCID: PMC5930953 DOI: 10.1186/s12885-018-4394-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 04/17/2018] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND The transcription factor PAX6 is expressed in various cancers. In anaplastic astrocytic glioma, PAX6 expression is inversely related to tumor grade, resulting in low PAX6 expression in Glioblastoma, the highest-grade astrocytic glioma. The aim of the present study was to develop a PAX6 knock out cell line as a tool for molecular studies of the roles PAX6 have in attenuating glioblastoma tumor progression. METHODS The CRISPR-Cas9 technique was used to knock out PAX6 in U251 N cells. Viral transduction of a doxycycline inducible EGFP-PAX6 expression vector was used to re-introduce (rescue) PAX6 expression in the PAX6 knock out cells. The knock out and rescued cells were rigorously characterized by analyzing morphology, proliferation, colony forming abilities and responses to oxidative stress and chemotherapeutic agents. RESULTS The knock out cells had increased proliferation and colony forming abilities compared to wild type cells, consistent with clinical observations indicating that PAX6 functions as a tumor-suppressor. Cell cycle distribution and sensitivity to H2O2 induced oxidative stress were further studied, as well as the effect of different chemotherapeutic agents. For the PAX6 knock out cells, the percentage of cells in G2/M phase increased compared to PAX6 control cells, indicating that PAX6 keeps U251 N cells in the G1 phase of the cell cycle. Interestingly, PAX6 knock out cells were more resilient to H2O2 induced oxidative stress than wild type cells. Chemotherapy treatment is known to generate oxidative stress, hence the effect of several chemotherapeutic agents were tested. We discovered interesting differences in the sensitivity to chemotherapeutic drugs (Temozolomide, Withaferin A and Sulforaphane) between the PAX6 expressing and non-expressing cells. CONCLUSIONS The U251 N PAX6 knock out cell lines generated can be used as a tool to study the molecular functions and mechanisms of PAX6 as a tumor suppressor with regard to tumor progression and treatment of glioblastoma.
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13
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Kiselev Y, Andersen S, Johannessen C, Fjukstad B, Standahl Olsen K, Stenvold H, Al-Saad S, Donnem T, Richardsen E, Bremnes RM, Rasmussen Busund LT. Transcription factor PAX6 as a novel prognostic factor and putative tumour suppressor in non-small cell lung cancer. Sci Rep 2018; 8:5059. [PMID: 29568088 PMCID: PMC5864921 DOI: 10.1038/s41598-018-23417-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 03/09/2018] [Indexed: 12/21/2022] Open
Abstract
Lung cancer is the leading cause of cancer deaths. Novel predictive biomarkers are needed to improve treatment selection and more accurate prognostication. PAX6 is a transcription factor with a proposed tumour suppressor function. Immunohistochemical staining was performed on tissue microarrays from 335 non-small cell lung cancer (NSCLC) patients for PAX6. Multivariate analyses of clinico-pathological variables and disease-specific survival (DSS) was carried out, and phenotypic changes of two NSCLC cell lines with knockdown of PAX6 were characterized. While PAX6 expression was only associated with a trend of better disease-specific survival (DSS) (p = 0.10), the pN+ subgroup (N = 103) showed significant correlation between high PAX6 expression and longer DSS (p = 0.022). Median survival for pN + patients with high PAX6 expression was 127.4 months, versus 22.9 months for patients with low PAX6 expression. In NCI-H661 cells, knockdown of PAX6 strongly activated serum-stimulated migration. In NCI-H460 cells, PAX6 knockdown activated anchorage-independent growth. We did not observe any significant effect of PAX6 on proliferation in either of cell lines. Our findings strongly support the proposition of PAX6 as a valid and positive prognostic marker in NSCLC in node-positive patients. There is a need for further studies, which should provide mechanistical explanation for the role of PAX6 in NSCLC.
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Affiliation(s)
- Yury Kiselev
- Department of Life Sciences and Health, Faculty of Health Sciences, OsloMet - Oslo Metropolitan University, Oslo, Norway. .,Department of Pharmacy, UiT The Arctic University of Norway, Tromso, Norway. .,Department of Medical Biology, UiT The Arctic University of Norway, Tromso, Norway.
| | - Sigve Andersen
- Department of Clinical Medicine, UiT The Arctic University of Norway, Tromso, Norway.,Department of Oncology, University Hospital of North Norway, Tromso, Norway
| | - Charles Johannessen
- Department of Medical Biology, UiT The Arctic University of Norway, Tromso, Norway
| | - Bjørn Fjukstad
- Department of Computer Science, Faculty of Science and Technology, UiT The Arctic University of Norway, Tromso, Norway
| | - Karina Standahl Olsen
- Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromso, Norway
| | - Helge Stenvold
- Department of Oncology, University Hospital of North Norway, Tromso, Norway
| | - Samer Al-Saad
- Department of Medical Biology, UiT The Arctic University of Norway, Tromso, Norway.,Department of Clinical Pathology, University Hospital of North Norway, Tromso, Norway
| | - Tom Donnem
- Department of Clinical Medicine, UiT The Arctic University of Norway, Tromso, Norway.,Department of Oncology, University Hospital of North Norway, Tromso, Norway
| | - Elin Richardsen
- Department of Medical Biology, UiT The Arctic University of Norway, Tromso, Norway.,Department of Clinical Pathology, University Hospital of North Norway, Tromso, Norway
| | - Roy M Bremnes
- Department of Clinical Medicine, UiT The Arctic University of Norway, Tromso, Norway.,Department of Oncology, University Hospital of North Norway, Tromso, Norway
| | - Lill-Tove Rasmussen Busund
- Department of Medical Biology, UiT The Arctic University of Norway, Tromso, Norway.,Department of Clinical Pathology, University Hospital of North Norway, Tromso, Norway
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14
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Meng Q, Dai M, Nie X, Zhang W, Xu X, Li J, Mu H, Liu X, Qin L, Zhu X, Yan J, Zheng M. MicroRNA-19 contributes to the malignant phenotypes of osteosarcoma in vitro by targeting Pax6. Tumour Biol 2018; 40:1010428317744704. [PMID: 29345189 DOI: 10.1177/1010428317744704] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
This study was conducted to detect the expression of miR-19 and Pax6 (Paired box protein 6) in human osteosarcoma cells and the effects on biological characteristics of osteosarcoma cells. Quantitative real-time polymerase chain reaction was used to detect the expression of Pax6 and miR-19 in normal human osteoblasts (hFOB 1.19) and osteosarcoma cell lines (U2OS, Saos-2, and MG-63). Results showed that miR-19 was significantly upregulated in osteosarcoma cell lines compared with that in hFOB 1.19 cells, while the expression of Pax6 messenger RNA was significantly downregulated. Pax6 was defined as the target gene of miR-19 which was validated by luciferase reporter gene analysis. Results indicated that miR-19 had an interaction with Pax6 3'-untranslated region. At the same time, the protein expression of Pax6 was significantly decreased in the MG-63 cells transfected with miR-19 mimic and was notably enhanced in osteosarcoma MG-63 cells transfected with miR-19 inhibitor. These data suggested that Pax6 was a target of miR-19 in osteosarcoma MG-63 cells. The effects of miR-19 on the biological behavior of MG-63 cells were determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide, flow cytometry, and Transwell assay. Results showed that the downregulation of miR-19 inhibited cell viability, reduced the percentage of cells in S phase and the number of cells passing through the Transwell chamber, and increased the number of apoptotic cells. Western blot analysis showed that the inhibition of miR-19 significantly increased the expression of epithelial proteins (E-cadherin and β-catenin) and decreased the expression of mesenchymal protein (Vimentin), extracellular signal-regulated kinase, and phosphorylated extracellular signal-regulated kinase in MG-63 cells. MiR-19 inhibitor and Pax6 small interfering RNA were simultaneously transfected into MG-63 cells. Results from 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide, flow cytometry, and Transwell assay demonstrated that the inhibition of Pax6 expression in MG-63 cells could reverse the cell biological effects induced by the inhibition of miR-19 expression. Based on these findings, it was suggested that miR-19, upregulated in osteosarcoma cells, negatively regulated the expression of Pax6, which can promote the malignant phenotypes of osteosarcoma cells via activation of the extracellular signal-regulated kinase signaling pathways. Therefore, miR-19/Pax6 may offer potential for use as a target for the treatment of osteosarcoma.
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Affiliation(s)
- Qingbing Meng
- 1 Orthopedics Department, Yancheng City No. 1 People's Hospital, Yancheng, P.R. China
| | - Ming Dai
- 2 Department of Medical Laboratory, School of Public Health, Nantong University, Nantong, P.R. China
| | - Xuejun Nie
- 3 Department of Ultrasound, Affiliated Hospital of Nantong University, Nantong, P.R. China
| | - Wensheng Zhang
- 1 Orthopedics Department, Yancheng City No. 1 People's Hospital, Yancheng, P.R. China
| | - Xingli Xu
- 1 Orthopedics Department, Yancheng City No. 1 People's Hospital, Yancheng, P.R. China
| | - Jian Li
- 1 Orthopedics Department, Yancheng City No. 1 People's Hospital, Yancheng, P.R. China
| | - Hongxin Mu
- 1 Orthopedics Department, Yancheng City No. 1 People's Hospital, Yancheng, P.R. China
| | - Xiaolan Liu
- 1 Orthopedics Department, Yancheng City No. 1 People's Hospital, Yancheng, P.R. China
| | - Ling Qin
- 1 Orthopedics Department, Yancheng City No. 1 People's Hospital, Yancheng, P.R. China
| | - Xiaoqi Zhu
- 1 Orthopedics Department, Yancheng City No. 1 People's Hospital, Yancheng, P.R. China
| | - Jun Yan
- 1 Orthopedics Department, Yancheng City No. 1 People's Hospital, Yancheng, P.R. China
| | - Minqian Zheng
- 1 Orthopedics Department, Yancheng City No. 1 People's Hospital, Yancheng, P.R. China
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15
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廖 晓, 尹 蔚, 王 芳, 邬 力, 黄 柏. [Construction of a lentiviral vector carrying short?hairpin RNA targeting PAX6 and its effect on proliferation of glioma U251 cells in vitro]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2017; 37:1603-1608. [PMID: 29292252 PMCID: PMC6744028 DOI: 10.3969/j.issn.1673-4254.2017.12.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To construct a lentiviral vector for delivering short hairpin RNA (shRNA) targeting PAX6 and investigate its effect on the proliferation of glioma U251 cells in vitro. METHODS Two small interfering RNA sequences targeting PAX6 gene were designed based on the reported sequence of PAX6 and annealed to form a double?stranded chain, which was inserted into a lentiviral vector to construct the recombinant lentiviral vector shRNA?PAX6. The recombinant vector was infected into U251 cells, and the expression of PAX6 mRNA and protein in the cells was detected by real?time PCR and Western blotting, respectively. The changes in the proliferation of U251 cells after the infection was assessed using MTT assay. RESULTS Double enzyme digestion of the lentiviral vector pLKD?CMV?G&NR?U6?shRNA yielded an 8208?bp fragment, and colony PCR and sequencing analysis confirmed successful construction of the lentiviral vector shRNA?PAX6. Infection of the cells with shRNA?PAX6 caused a significant reduction of the expressions of PAX6 mRNA and protein (P<0.05) and resulted in obviously increased proliferation of U251 cells (P<0.05). CONCLUSION We successfully constructed the recombinant vector shRNA?PAX6 for silencing PAX6 gene. PAX6 gene silencing results in increased proliferation of U251 cells in vitro.
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Affiliation(s)
- 晓红 廖
- />中南大学湘雅医学院生理学系,湖南 长沙 410078Department of Physiology, Xiangya School of Medicine, Central South University, Changsha 410078, China
| | - 蔚兰 尹
- />中南大学湘雅医学院生理学系,湖南 长沙 410078Department of Physiology, Xiangya School of Medicine, Central South University, Changsha 410078, China
| | - 芳 王
- />中南大学湘雅医学院生理学系,湖南 长沙 410078Department of Physiology, Xiangya School of Medicine, Central South University, Changsha 410078, China
| | - 力祥 邬
- />中南大学湘雅医学院生理学系,湖南 长沙 410078Department of Physiology, Xiangya School of Medicine, Central South University, Changsha 410078, China
| | - 柏胜 黄
- />中南大学湘雅医学院生理学系,湖南 长沙 410078Department of Physiology, Xiangya School of Medicine, Central South University, Changsha 410078, China
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16
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Han X, Li H, Zhang Y, Qin J, Yang Q, Wang L, Yuan M, Xia C. Brain lipid-binding protein promotes proliferation and modulates cell cycle in C6 rat glioma cells. Int J Oncol 2017; 51:1439-1448. [PMID: 29048614 PMCID: PMC5642387 DOI: 10.3892/ijo.2017.4132] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 09/18/2017] [Indexed: 12/13/2022] Open
Abstract
Gliomas are the most common primary brain tumors affecting adults. Four grades of gliomas have been identified, namely, grades I-IV. Brain lipid-binding protein (BLBP), which functions in the intracellular transport of fatty acids, is expressed in all grades of human gliomas. The glioma cells that are cultured in vitro are grouped into the BLBP-positive and BLBP-negative cell lines. In the present study, we found that C6 rat glioma cells was a distinct type of BLBP-negative cell line. Our results confirmed that in the C6 cells, the expression of exogenous BLBP increased the proliferation and percentage of cells in the S phase, in the culture medium containing 10 or 1% FBS. Moreover, exogenous BLBP was found to downregulate the tumor suppressors p21 and p16 in the 1% FBS culture medium, but only p21 in the 10% FBS culture medium. The results of the xenograft model assay showed that exogenous BLBP also stimulated tumor formation and downregulated p21 and p16. In conclusion, our study demonstrated that exogenous BLBP promoted proliferation of the C6 cells in vitro and facilitated tumor formation in vivo. Therefore, BLBP expression in glioma cells may promote cell growth by inhibiting the tumor suppressors.
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Affiliation(s)
- Xiao Han
- Department of Anatomy and Cytoneurobiology Unit, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - Haoming Li
- Department of Human Anatomy, Medical School of Nantong University, Nantong, Jiangsu 226001, P.R. China
| | - Ye Zhang
- Department of Anatomy and Cytoneurobiology Unit, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
| | - Jianbing Qin
- Department of Human Anatomy, Medical School of Nantong University, Nantong, Jiangsu 226001, P.R. China
| | - Qingqing Yang
- Department of Medicine, Xinglin College of Nantong University, Nantong, Jiangsu 226001, P.R. China
| | - Lu Wang
- Department of Human Anatomy, Medical School of Nantong University, Nantong, Jiangsu 226001, P.R. China
| | - Mingjie Yuan
- Department of Human Anatomy, Medical School of Nantong University, Nantong, Jiangsu 226001, P.R. China
| | - Chunlin Xia
- Department of Anatomy and Cytoneurobiology Unit, Medical College of Soochow University, Suzhou, Jiangsu 215123, P.R. China
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17
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Zou Q, Yi W, Huang J, Fu F, Chen G, Zhong D. MicroRNA-375 targets PAX6 and inhibits the viability, migration and invasion of human breast cancer MCF-7 cells. Exp Ther Med 2017; 14:1198-1204. [PMID: 28810579 DOI: 10.3892/etm.2017.4593] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 02/10/2017] [Indexed: 12/13/2022] Open
Abstract
MicroRNAs (miRs) are a type of small non-coding RNA that serve crucial roles in the development and progression of breast cancer. However, the exact role and underlying molecular mechanism of miR-375 in mediating the growth and metastasis of breast cancer remains unknown. In the present study, reverse transcription-quantitative polymerase chain reaction and western blot analysis were conducted to examine RNA and protein expression. A luciferase reporter assay was performed to determine the association between miR-375 and paired box 6 (PAX6). The results of the current study indicate that the expression of miR-375 was reduced in breast cancer tissues compared with matched adjacent normal tissues. Transfection with miR-375 mimics led to a significant increase in levels of miR-375 in human breast cancer Michigan Cancer Foundation (MCF)-7 cells (P<0.05). The increase in miR-375 expression caused a significant decrease in the viability, migration and invasion of MCF-7 cells (P<0.05), accompanied by a reduced expression of matrix metalloproteinase (MMP) 2 and MMP9 proteins. Luciferase reporter assay identified PAX6 as a novel target of miR-375 and miR-375 in turn, negatively regulated the protein expression of PAX6 in MCF-7 cells. By contrast, overexpression of PAX6 led to a significant increase in MCF-7 cell viability (P<0.01) but did not affect the migration and invasion of MCF-7 cells, suggesting that the inhibitory effect of miR-375 on MCF-7 cell viability may be occurring, in part, via the direct targeting of PAX6.
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Affiliation(s)
- Qiongyan Zou
- Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Wenjun Yi
- Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Jianghai Huang
- Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Fenfen Fu
- Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Gannong Chen
- Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Dewu Zhong
- Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
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18
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Cao X, He L, Li Y. Effects of PPARγ agonistrosiglitazone on human retinoblastoma cell in vitro and in vivo. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2015; 8:12549-12556. [PMID: 26722443 PMCID: PMC4680388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 09/25/2015] [Indexed: 06/05/2023]
Abstract
The aim of the study was to evaluate the antitumor effects of the PPARγ agonist rosiglitazone on the human retinoblastoma. The cell biological behavior was detected, specifically, the effects of rosiglitazone on cell viability and apoptosis of the human retinoblastoma Y79 cells were investigated by MTT assay and Hochest 33258 staining and the migration assay showed that rosiglitazone blocked the invasion and migration of the carcinoma cells through the reconstituted extracellular matrix (Matrigel). The effect of rosiglitazone on NF-κB-dependent reporter gene transcription induced by LPS was analyzed by NF-κB-luciferase assay. Then human retinoblastoma Y79 cells were subcutaneously transplanted in BALB/c nude mice, and the animals were treated with rosiglitazone (20 mg/kg, 40 mg/kg, and 80 mg/kg) to verify its anti-tumor effect in vivo. Rosiglitazone suppressed the viability of Y79 cells dose- and time-dependently and induced apoptosis in Y79 cells in vitro. Molecular biology analysis found that rosiglitazone could modulate the proliferative and apoptosis related signal, reduce NF-κB-dependent reporter gene transcription induced by LPS. Rosiglitazone markedly reduced the growth of Y79 cells transplanted into the mice without causing significant side effects. Our results suggested that rosiglitazone demonstrated antitumor activity against the human retinoblastoma Y79 cells by inhibiting cell growth, inducing apoptosis and inhibiting metastasis and invasion in vitro and delaying tumor growth in vivo.
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Affiliation(s)
- Xianyong Cao
- Department of Ophthalmology, The Third Affiliated Hospital of Xinxiang Medical University, Eye Hospital of Xinxiang Medical University Xinxiang 453000, Henan Province, China
| | - Lin He
- Department of Ophthalmology, The Third Affiliated Hospital of Xinxiang Medical University, Eye Hospital of Xinxiang Medical University Xinxiang 453000, Henan Province, China
| | - Yanhua Li
- Department of Ophthalmology, The Third Affiliated Hospital of Xinxiang Medical University, Eye Hospital of Xinxiang Medical University Xinxiang 453000, Henan Province, China
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