PMID- 27600506 OWN - NLM STAT- MEDLINE DCOM- 20170518 LR - 20201215 IS - 1098-5522 (Electronic) IS - 0019-9567 (Print) IS - 0019-9567 (Linking) VI - 84 IP - 12 DP - 2016 Dec TI - MicroRNAs Regulate Cytokine Responses in Gingival Epithelial Cells. PG - 3282-3289 AB - MicroRNAs (miRNAs) have been established as key regulators of various biological processes with possible involvement in the pathobiology of periodontal disease. Expanding our earlier observations of substantial differential expression of specific miRNAs between clinically healthy and periodontitis-affected gingival tissues, we used miRNA inhibitors (sponges) in loss-of-function experiments to investigate the involvement of specific miRNAs in the response of pocket epithelium-derived, telomerase-immortalized human gingival keratinocytes (TIGKs) to microbial infection. We constructed stable knockdown (KD) cell lines for five epithelium-expressed miRNAs (miR-126, miR-141, miR-155, miR-210, and miR-1246) and assessed their response to infection with periodontal pathogens using microarray analysis, quantitative PCR (qPCR), enzyme-linked immunosorbent assay (ELISA), and Western blot assay. miR-126 KD cells showed lower expression of interleukin 8 (IL-8) and CXCL1, both on the mRNA and protein levels, than did controls upon stimulation by heat-killed wild-type Porphyromonas gingivalis, live P. gingivalis protease-deficient mutant KDP128, and live Aggregatibacter actinomycetemcomitans In contrast, infection of miR-155 KD and miR-210 KD cells with the same organisms resulted in higher IL-8 and CXCL1 mRNA and protein expression. These effects appeared to be regulated by NF-kappaB, as suggested by altered transcription and/or phosphorylation status of components of the NF-kappaB system. Reduced neutrophil-like HL-60 cell chemotactic activity was observed in response to infection of miR-126 KD cells, indicating that miR-126 plays an important role in immune responses. Our findings indicate that specific miRNAs regulate the expression of inflammatory cytokines in human gingival epithelial cells in response to microbial infection. CI - Copyright (c) 2016, American Society for Microbiology. All Rights Reserved. FAU - Chen, Steven C Y AU - Chen SC AD - Division of Periodontics, Section of Oral, Diagnostic and Rehabilitations Sciences, College of Dental Medicine, Columbia University, New York, New York, USA. FAU - Constantinides, Christos AU - Constantinides C AD - Division of Periodontics, Section of Oral, Diagnostic and Rehabilitations Sciences, College of Dental Medicine, Columbia University, New York, New York, USA. FAU - Kebschull, Moritz AU - Kebschull M AD - Division of Periodontics, Section of Oral, Diagnostic and Rehabilitations Sciences, College of Dental Medicine, Columbia University, New York, New York, USA. AD - Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany. FAU - Papapanou, Panos N AU - Papapanou PN AD - Division of Periodontics, Section of Oral, Diagnostic and Rehabilitations Sciences, College of Dental Medicine, Columbia University, New York, New York, USA pp192@cumc.columbia.edu. LA - eng GR - R03 DE024735/DE/NIDCR NIH HHS/United States GR - S10 OD020056/OD/NIH HHS/United States GR - UL1 TR000040/TR/NCATS NIH HHS/United States GR - R01 DE015649/DE/NIDCR NIH HHS/United States GR - R21 DE021820/DE/NIDCR NIH HHS/United States PT - Journal Article DEP - 20161118 PL - United States TA - Infect Immun JT - Infection and immunity JID - 0246127 RN - 0 (Cytokines) RN - 0 (MicroRNAs) SB - IM MH - Aggregatibacter actinomycetemcomitans MH - Cell Line MH - Chemotaxis MH - Cytokines/genetics/*metabolism MH - Gene Expression Regulation/*immunology MH - Gene Knockdown Techniques MH - Gingiva/*cytology MH - HL-60 Cells MH - Humans MH - Keratinocytes/*metabolism MH - MicroRNAs/genetics/*metabolism MH - Porphyromonas gingivalis PMC - PMC5116707 EDAT- 2016/09/08 06:00 MHDA- 2017/05/19 06:00 PMCR- 2017/05/18 CRDT- 2016/09/08 06:00 PHST- 2016/03/26 00:00 [received] PHST- 2016/08/30 00:00 [accepted] PHST- 2016/09/08 06:00 [pubmed] PHST- 2017/05/19 06:00 [medline] PHST- 2016/09/08 06:00 [entrez] PHST- 2017/05/18 00:00 [pmc-release] AID - IAI.00263-16 [pii] AID - 00263-16 [pii] AID - 10.1128/IAI.00263-16 [doi] PST - epublish SO - Infect Immun. 2016 Nov 18;84(12):3282-3289. doi: 10.1128/IAI.00263-16. Print 2016 Dec.