| MiR-320 and miR-494 affect cell cycles of primary murine bronchial epithelial cells exposed to benzo[a]pyrene. | |
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MedLine Citation:
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PMID: 19925859 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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MicroRNAs (miRNAs) are a class of small noncoding RNA molecules with profound impact on various biological processes. Some miRNAs are involved in tumorigenesis by regulation of cell cycle progression. Here, we cultured primary murine bronchial epithelial cells and then examined the expression of miR-320 and miR-494 in cells exposed to benzo[a]pyrene (B[a]P). To better characterize roles of miR-320 and miR-494 in cell cycle progression, we used miRNA inhibitors to downregulate expression of miRNAs and determined cell cycle distribution and expression of cyclin-dependent kinases 6 (CDK6) by flow cytometric analysis. Treating cells with 1 microM B[a]P for 24h resulted in time-dependent increases in miR-320 and miR-494 expression. Moreover, G1 arrest and downregulated expression of CDK6 were shown in the treated cells. Flow cytometric analysis indicated a relief of G1 arrest and an elevated expression of CDK6 after inhibition of the expressions of miR-320 and miR-494 in cells exposed to B[a]P. These results suggest that expression levels of miRNA-320 and miR-494, which regulate B[a]P-exposed cell cycle progression, may impact G1/S transition through CDK6, and provide further insights into functions of miRNAs in cell cycle of primary murine bronchial epithelial cells exposed to B[a]P. |
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Authors:
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Huihan Duan; Yiguo Jiang; Hongyu Zhang; Yan Wu |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-11-16 |
Journal Detail:
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Title: Toxicology in vitro : an international journal published in association with BIBRA Volume: 24 ISSN: 1879-3177 ISO Abbreviation: Toxicol In Vitro Publication Date: 2010 Apr |
Date Detail:
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Created Date: 2010-03-09 Completed Date: 2010-06-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8712158 Medline TA: Toxicol In Vitro Country: England |
Other Details:
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Languages: eng Pagination: 928-35 Citation Subset: IM |
Copyright Information:
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Copyright (c) 2009 Elsevier Ltd. All rights reserved. |
Affiliation:
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Institute for Chemical Carcinogenesis, State Key Laboratory of Respiratory Diseases, Guangzhou Medical University, Guangzhou 510182, PR China. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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7,8-Dihydro-7,8-dihydroxybenzo(a)pyrene 9,10-oxide
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pharmacology Animals Benzo(a)pyrene / toxicity* Bronchi / cytology*, drug effects Carcinogens / toxicity* Cell Cycle / drug effects* Cell Separation Cell Transformation, Neoplastic / drug effects Cells, Cultured Cyclin-Dependent Kinase 6 / biosynthesis, genetics Environmental Pollutants / toxicity* Epithelial Cells / drug effects* Female Flow Cytometry Male Mice MicroRNAs / pharmacology* Rats Reverse Transcriptase Polymerase Chain Reaction Transfection |
| Chemical | |
Reg. No./Substance:
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0/Carcinogens; 0/Environmental Pollutants; 0/MicroRNAs; 0/Mirn320 microRNA, mouse; 0/Mirn494 microRNA, mouse; 50-32-8/Benzo(a)pyrene; 55097-80-8/7,8-Dihydro-7,8-dihydroxybenzo(a)pyrene 9,10-oxide; EC 2.7.11.22/Cyclin-Dependent Kinase 6 |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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