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Wang Q, Li X, Zhu Y, Yang P. MicroRNA-16 suppresses epithelial-mesenchymal transition‑related gene expression in human glioma. Mol Med Rep 2014; 10:3310-4. [PMID: 25242314 DOI: 10.3892/mmr.2014.2583] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 06/10/2014] [Indexed: 11/06/2022] Open
Abstract
Glioma is one of the most prevalent types of brain tumor and is associated with the highest mortality rate of all CNS cancers. Epithelial‑mesenchymal transition (EMT) has been recognized as an important factor in tumor metastasis. Previously, it has been demonstrated that microRNA-16 (miR-16) has an important role in tumor metastasis in human cancer cell lines. However, the role of miR-16 in epithelial‑mesenchymal transition of human glioma cells remains unclear. In the present study, U87 and U251 glioma cell lines overexpressing miR-16 were established and it was identified that miR-16 suppressed invasion, adhesion, cell cycle, production of interleukin (IL)-6, IL-8 and transforming growth factor-β, and EMT-related gene expression, including vimentin, β-catenin and E-cadherin in miR-16 overexpressing U87 and U251 glioma cells. Furthermore, miR-16 suppressed EMT mainly through the downregulation of p-FAK and p-Akt expression, and nuclear factor-κB and Slug transcriptional activity. Therefore, miR-16 may be an important therapeutic target and predictor for glioma therapy.
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Affiliation(s)
- Qin Wang
- Department of Clinical Laboratory, Tianjin Huanhu Hospital, Tianjin 300060, P.R. China
| | - Xu Li
- Department of Clinical Laboratory, Tianjin Huanhu Hospital, Tianjin 300060, P.R. China
| | - Yu Zhu
- Department of Clinical Laboratory, Tianjin Huanhu Hospital, Tianjin 300060, P.R. China
| | - Ping Yang
- Department of Clinical Laboratory, Tianjin Huanhu Hospital, Tianjin 300060, P.R. China
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Takenouchi T, Suzuki S, Shinkai H, Tsukimoto M, Sato M, Uenishi H, Kitani H. Extracellular ATP does not induce P2X7 receptor-dependent responses in cultured renal- and liver-derived swine macrophages. RESULTS IN IMMUNOLOGY 2014; 4:62-7. [PMID: 25379376 PMCID: PMC4213840 DOI: 10.1016/j.rinim.2014.07.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 07/15/2014] [Accepted: 07/21/2014] [Indexed: 11/26/2022]
Abstract
The P2X7 receptor (P2X7R) is an ATP-gated cation channel that is abundantly expressed in monocytes/macrophages. P2X7R activation by ATP results in various cellular responses including Ca(2+) influx, membrane pore formation, and cytokine secretion. Since P2X7R has low affinity for ATP, high concentrations of ATP (in the mM range) are generally required to activate this receptor in vitro. Functional expression of P2X7R has been detected in monocytes/macrophages obtained from different animal species including humans, rodents, dogs, and bovines, but so far it has not been detected in swine (Sus scrofa). In this study, we investigated the expression and functions of P2X7R in swine macrophages, which were isolated from mixed primary cultures of swine kidney or liver tissue. The P2X7R mRNA and protein expression observed in the swine macrophages was comparable to that seen in a c-myc-immortalized mouse kidney-derived clonal macrophage cell line (KM-1). However, extracellular ATP did not induce P2X7R-dependent sustained Ca(2+) influx, membrane pore formation, or the secretion of the bioactive cytokine interleukin-1β in the swine macrophages, whereas these responses were clearly observed in the mouse KM-1 cells after stimulation with millimolar concentrations of ATP as a positive control. These findings suggest that the ATP/P2X7R pathway is impaired in swine macrophages at least in the culture conditions used in the present study.
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Affiliation(s)
- Takato Takenouchi
- Animal Immune and Cell Biology Research Unit, Division of Animal Sciences, National Institute of Agrobiological Sciences, 1-2 Ohwashi, Tsukuba, Ibaraki 305-8634, Japan
| | - Shunichi Suzuki
- Transgenic Pig Research Unit, National Institute of Agrobiological Sciences, 2 Ikenodai, Tsukuba, Ibaraki 305-0901, Japan
| | - Hiroki Shinkai
- Animal Immune and Cell Biology Research Unit, Division of Animal Sciences, National Institute of Agrobiological Sciences, 1-2 Ohwashi, Tsukuba, Ibaraki 305-8634, Japan
| | - Mitsutoshi Tsukimoto
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan
| | - Mitsuru Sato
- Animal Immune and Cell Biology Research Unit, Division of Animal Sciences, National Institute of Agrobiological Sciences, 1-2 Ohwashi, Tsukuba, Ibaraki 305-8634, Japan
| | - Hirohide Uenishi
- Animal Immune and Cell Biology Research Unit, Division of Animal Sciences, National Institute of Agrobiological Sciences, 1-2 Ohwashi, Tsukuba, Ibaraki 305-8634, Japan ; Animal Genome Research Unit, Agrogenomics Research Center, National Institute of Agrobiological Sciences, 2 Ikenodai, Tsukuba, Ibaraki 305-0901, Japan
| | - Hiroshi Kitani
- Animal Immune and Cell Biology Research Unit, Division of Animal Sciences, National Institute of Agrobiological Sciences, 1-2 Ohwashi, Tsukuba, Ibaraki 305-8634, Japan
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