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Wen X, Li S, Guo M, Liao H, Chen Y, Kuang X, Liao X, Ma L, Li Q. miR-181a-5p inhibits the proliferation and invasion of drug-resistant glioblastoma cells by targeting F-box protein 11 expression. Oncol Lett 2020; 20:235. [PMID: 32968457 PMCID: PMC7500031 DOI: 10.3892/ol.2020.12098] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 08/04/2020] [Indexed: 12/17/2022] Open
Abstract
Glioblastoma (GBM) is the most common malignant primary tumor in the human central nervous system. The present study aimed to explore the molecular mechanism by which microRNA (miR)-181a-5p targets the F-box protein 11 (FBXO11) in glioma cells to inhibit cell proliferation and invasion. Reverse transcription-quantitative (RT-q)PCR was performed to detect the expression levels of miR-181a-5p in U251TR cells, U251 cells, primary GBM tissues and relapsed GBM tissues in order to determine the association between miR-181a-5p and the chemoresistance of GBM cells. The expression levels of miR-181a-5p in GBM cells were modulated via transfecting miR-181a-5p mimics and inhibitors. Cell Counting Kit-8 assays were undertaken to assess the effects of miR-181a-5p on drug sensitivity and proliferation of GBM cells. Wound healing assays were performed to examine the effects of miR-181a-5p on the migratory ability of GBM cells. Furthermore, the effects of miR-181a-5p on the invasive ability of GBM cells were analyzed using an in vitro invasion assay. Flow cytometry analysis was carried out to determine whether overexpression of miR-181a-5p can promote the apoptotic rate of GBM cells. RT-qPCR and western blotting were employed to detect the effects of miR-181a-5p on mRNA and protein expression of FBX011. miR-181a-5p exhibited low expression in resistant GBM cell lines and recurrent tumor tissues. Dual-luciferase reporter assays were utilized to detect luciferase activity to verify the targeted regulatory association between miR-181a-5p and FBXO11. Upregulation of miR-181a-5p promoted the sensitivity of GBM cells to temozolomide (TMZ), increased the apoptotic rate of GBM cells and significantly inhibited the invasive and migratory capacities of GBM cells. In drug-resistant glioma cells, compared with the miR-negative control group and the blank group, the expression of miR-181a-5p was significantly upregulated (P<0.01), while the expression of FBXO11 protein was downregulated. miR-181a-5p increased the sensitivity of GBM cells to TMZ. miR-181a-5p significantly inhibited the migratory and invasive capacities of GBM cells. miR-181a-5p may become a novel effective target for the treatment of GBM. The results of dual-luciferase reporter assays indicated that miR-181a-5p could target the 3′-untranslated region of FBXO11. The underlying mechanism may be targeted inhibition of FBXO11 gene expression, or may be associated with apoptosis.
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Affiliation(s)
- Xueyan Wen
- Department of Neurology, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570102, P.R. China.,Key Laboratory of Brain Science Research and Transformation in Tropical Environment of Hainan Province, Haikou, Hainan 571199, P.R. China.,Department of Neurosurgery, Affiliated Hospital of Guilin Medical University, Guilin, Guangxi 541001, P.R. China
| | - Songrong Li
- Department of Neurology, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570102, P.R. China.,Key Laboratory of Brain Science Research and Transformation in Tropical Environment of Hainan Province, Haikou, Hainan 571199, P.R. China
| | - Mengchan Guo
- Department of Neurology, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570102, P.R. China.,Key Laboratory of Brain Science Research and Transformation in Tropical Environment of Hainan Province, Haikou, Hainan 571199, P.R. China
| | - Hongzhan Liao
- Department of Neurology, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570102, P.R. China.,Key Laboratory of Brain Science Research and Transformation in Tropical Environment of Hainan Province, Haikou, Hainan 571199, P.R. China.,Department of Neurosurgery, Affiliated Hospital of Guilin Medical University, Guilin, Guangxi 541001, P.R. China
| | - Yongmin Chen
- Department of Neurology, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570102, P.R. China.,Key Laboratory of Brain Science Research and Transformation in Tropical Environment of Hainan Province, Haikou, Hainan 571199, P.R. China
| | - Xi Kuang
- Department of Neurology, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570102, P.R. China.,Key Laboratory of Brain Science Research and Transformation in Tropical Environment of Hainan Province, Haikou, Hainan 571199, P.R. China
| | - Xiaoping Liao
- Department of Neurology, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570102, P.R. China.,Key Laboratory of Brain Science Research and Transformation in Tropical Environment of Hainan Province, Haikou, Hainan 571199, P.R. China
| | - Lin Ma
- Department of Neurology, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570102, P.R. China.,Key Laboratory of Brain Science Research and Transformation in Tropical Environment of Hainan Province, Haikou, Hainan 571199, P.R. China
| | - Qifu Li
- Department of Neurology, The First Affiliated Hospital of Hainan Medical University, Haikou, Hainan 570102, P.R. China.,Key Laboratory of Brain Science Research and Transformation in Tropical Environment of Hainan Province, Haikou, Hainan 571199, P.R. China
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Ultracentrifugation versus kit exosome isolation: nanoLC-MS and other tools reveal similar performance biomarkers, but also contaminations. Future Sci OA 2018; 5:FSO359. [PMID: 30652024 PMCID: PMC6331754 DOI: 10.4155/fsoa-2018-0088] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 10/23/2018] [Indexed: 01/08/2023] Open
Abstract
Aim For isolation of exosomes, differential ultracentrifugation and an isolation kit from a major vendor were compared. Materials & methods 'Case study' exosomes isolated from patient-derived cells from glioblastoma multiforme and a breast cancer cell line were analyzed. Results Transmission electron microscopy, dynamic light scattering, western blotting, and so forth, revealed comparable performance. Potential protein biomarkers for both diseases were also identified in the isolates using nanoLC-MS. Western blotting and nanoLC-MS also revealed negative exosome markers regarding both isolation approaches. Conclusion The two isolation methods had an overall similar performance, but we hesitate to use the term 'exosome isolation' as impurities may be present with both isolation methods. NanoLC-MS can detect disease biomarkers in exosomes and is useful for critical assessment of exosome enrichment procedures.
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Evolution of epilepsy in hemimegalencephaly from infancy to adulthood: Case report and review of the literature. EPILEPSY & BEHAVIOR CASE REPORTS 2017; 7:45-48. [PMID: 28377884 PMCID: PMC5369267 DOI: 10.1016/j.ebcr.2017.02.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 02/09/2017] [Accepted: 02/15/2017] [Indexed: 11/21/2022]
Abstract
Hemimegalencephaly (HME) is a rare disorder of cortical development with overgrowth of one cerebral hemisphere. Patients have intellectual delay, hemiparesis and severe epilepsy. Drug-resistant epilepsy is often treated with a hemispherectomy. We review the literature on HME natural history and report a 26-year-old man with HME who did not undergo hemispherectomy in childhood with recurrent focal convulsive or non-convulsive status epilepticus. Few patients with HME have been followed into adulthood. Reported adult cases have milder epilepsy or underwent hemispherectomy in childhood. Patients surviving to adulthood have poor outcomes, regardless of treatment method, although seizure burden is improved with hemispherectomy. Hemimegalencephaly is a rare disorder of neuronal migration characterized by epilepsy, developmental delay and hemiparesis. Outcomes of hemimegalencephaly are generally poor; however, this is typically reported in pediatric populations, not adults. Hemispherectomy is beneficial in reducing seizure burden; however, most do not obtain seizure-freedom. Seizures are typically focal onset; however, the epileptogenic area may increase with poor seizure control.
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