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Lv KT, Liu Z, Feng J, Zhao W, Hao T, Ding WY, Chu JP, Gao LJ. MiR-22-3p Regulates Cell Proliferation and Inhibits Cell Apoptosis through Targeting the eIF4EBP3 Gene in Human Cervical Squamous Carcinoma Cells. Int J Med Sci 2018; 15:142-152. [PMID: 29333098 PMCID: PMC5765727 DOI: 10.7150/ijms.21645] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 10/31/2017] [Indexed: 12/11/2022] Open
Abstract
Background: MicroRNAs (miRNAs) are non-coding small RNAs that function as negative regulators of gene expression and are involved in tumour biology. The eIF4E-binding proteins (eIF4EBPs) play essential roles in preventing translation initiation and inhibiting protein synthesis at a global or message-specific level in a variety of tumours. Methods: According to comparative miRNA profiles of clinical cervical cancer and non-cancerous cervical tissue specimens, several miRNAs were aberrantly expressed in the cervical cancer samples. C33a and SiHa cell proliferation and apoptosis were detected using methyl thiazolyl tetrazolium (MTT) and flow cytometry assays, respectively. Results: Among the aberrantly expressed miRNAs, miR-22-3p was significantly differentially expressed in cervical cancer tissues and was highly associated with cervical cancer cell growth regulation. In addition, bioinformatic predictions and experimental validation were used to identify whether eIF4E-binding protein 3 (eIF4EBP3) was a direct target of miR-22-3p; eIF4EBP3 protein levels were generally low in the cervical cancer tissues. Furthermore, functional studies revealed that either a miR-22-3p inhibitor or eIF4EBP3 overexpression could induce apoptosis in cervical cancer cells in vitro. Importantly, we found that eIF4EBP3 accumulation could significantly attenuate cervical cancer cell proliferation triggered by a miR-22-3p mimic as well as enhance apoptosis in cervical cancer cells. Conclusion: Taken together, our data provide primary proof that miR-22-3p can induce cervical cancer cell growth at least in part by up-regulating its expression to decrease eIF4EBP3 expression levels; miR-22-3p thus holds promise as a prognostic biomarker and potential therapeutic target for treating cervical cancer.
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Affiliation(s)
- Kang-Tai Lv
- Department of Gynaecology and Obstetrics, Qixia District Maternity and Child Health Care Hospital, Nanjing, 210028, China
| | - Zhu Liu
- Department of Gynaecology and Obstetrics, Huangdao District of Traditional Chinese Medicine, Qingdao, 266500, China
| | - Jie Feng
- State Key Laboratory of Reproductive Medicine, Department of Clinical Laboratory, Nanjing Maternity and Child Health Care Hospital affiliated to Nanjing Medical University, Nanjing, 210004, China
| | - Wei Zhao
- State Key Laboratory of Reproductive Medicine, Department of Clinical Laboratory, Nanjing Maternity and Child Health Care Hospital affiliated to Nanjing Medical University, Nanjing, 210004, China
| | - Tao Hao
- Department of Gynaecology and Obstetrics, Huangdao District of Traditional Chinese Medicine, Qingdao, 266500, China
| | - Wen-Yan Ding
- State Key Laboratory of Reproductive Medicine, Department of Clinical Laboratory, Nanjing Maternity and Child Health Care Hospital affiliated to Nanjing Medical University, Nanjing, 210004, China
| | - Jing-Ping Chu
- Department of Gynaecology and Obstetrics, Huangdao District of Traditional Chinese Medicine, Qingdao, 266500, China
| | - Ling-Juan Gao
- State Key Laboratory of Reproductive Medicine, Department of Clinical Laboratory, Nanjing Maternity and Child Health Care Hospital affiliated to Nanjing Medical University, Nanjing, 210004, China
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Ishida T. [Overview of structural study on conformations and intermolecular interactions of biomolecules]. YAKUGAKU ZASSHI 2012; 132:785-816. [PMID: 22790026 DOI: 10.1248/yakushi.132.785] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Information on the conformational feature and specific intermolecular interaction of biomolecules is important to understand the biological function and to develop device for treating disorder caused by the abnormal function. Thus the 3D structures of the biologically active molecules and the specific interactions with their target molecules at the atomic level have been investigated by various physicochemical approaches. Herein, the following five subjects are reviewed: (1) function-linked conformations of biomolecules including natural annular products, opioid peptides and neuropeptides; (2) π-π stacking interactions of tryptophan derivatives with coenzymes and nucleic acid bases; (3) mRNA cap recognition of eukaryotic initiation factor 4E and its regulation by 4E-binding protein; (4) conformational feature of histamine H2 receptor antagonists and design of cathepsin B inhibitors; (5) self-aggregation mechanism of tau protein and its inhibition.
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Affiliation(s)
- Toshimasa Ishida
- Laboratory of Physical Chemistry, Osaka University of Pharmaceutical Sciences, Takatsuki, Osaka, Japan.
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Ishida T. Structural studies of specific intermolecular interactions and self-aggregation of biomolecules and their application to drug design. Chem Pharm Bull (Tokyo) 2010; 57:1309-34. [PMID: 19952439 DOI: 10.1248/cpb.57.1309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Information on the structural basis of intermolecular recognition or self-aggregation of biomolecules at the atomic level is important to understand biological functions and to develop devices for treating disorders caused by abnormal functions. Thus structural analysis of specific intermolecular or intramolecular interactions of biomolecules has been performed using various physicochemical approaches. Herein, the following three subjects are reviewed: (1) structural analyses of mRNA cap structure recognition by eukaryotic initiation factor 4E and its functional regulation by endogenous 4E-binding protein; (2) structural studies of self-aggregation mechanism of microtubule-binding domain in tau protein and aggregation inhibitor; and (3) molecular design of cathepsin B-specific inhibitor.
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Affiliation(s)
- Toshimasa Ishida
- Osaka University of Pharmaceutical Sciences, Nasahara, Takatsuki, Japan.
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