fa Human embryonic stem cells derived keratinocyte as an in vitro research model for the study of immune response بیماری های دهان Oral Medicine پژوهشي Research <p> <strong>Background</strong></p><p>  The innate immune response (IMR) is critical for the oral mucosa due to their continuous exposure to various oral pathogens. Keratinocytes play important role in IMR. Therefore, to date, keratinocytes from different sources have been used as in vitro research model for the study of IMR. However, current keratinocyte research models are hampered by the limited supply, patients' dependency and batch to batch variation. Therefore, in this study, we demonstrated the use of human embryonic stem cells (hESCs) derived keratinocytes (H9-Kert) as an alternative research model for the study of IMR.</p><p> <strong> Methods</strong> </p><p> The expression kinetics of toll-like receptor (TLR) 2, TLR 4, interleukin (IL) -6, IL-8, inducible nitric oxide synthase (iNOS) and tumour necrosis factor-alpha (TNF-α), in H9-Kert and immortalized human keratinocyte cell line (HaCaT) were analysed at mRNA levels by both reverse transcription polymerase chain reaction (RT-PCR) and quantitative real-time RT-PCR. The activation of the inflammatory transcription factor nuclear factor kappa-b (NFĸB) was assayed in these cells by transiently transfecting the cells with NFĸB reporter plasmid. Activation of NFĸB following treatment with heat-killed Porphyromonas gingivalis (P. gingivalis), an oral pathogen, was determined by assaying for the reporter, secreted alkaline phosphatase activity. </p><p> <strong>Results</strong></p><p>  The expression of TLRs, cytokines and activation of NFĸB following bacterial stimulation showed in both H9-Kert and the widely used HaCaT keratinocyte cell line was similar. </p><p> <strong>Conclusion</strong></p><p>  Overall, our results support the potential application of hESCs as an alternative limitless cell source for primary keratinocytes which can be used as consistent and dependable research tool with minimum variations and no donor's dependency. </p><hr><p></p><p> <strong>Source: </strong>Journal of Oral Pathology & Medicine</p><p><a href="http://onlinelibrary.wiley.com/doi/10.1111/jop.12054/abstract" target="_blank"><font color="#0000ff"> Full Text</font></a></p> human embryonic stem cells;human embryonic stem cells derived keratinocyte;innate immunity;toll-like receptors 0 0 http://idai.ir/browse.php?a_code=A-10-32-2298&slc_lang=fa&sid=1 Fahad Karim Kidwai 100319475328460010938 100319475328460010938 No Oral Sciences Disciplines, Faculty of Dentistry, National University of Singapore, Singapore Doorgesh Sharma Jokhun 100319475328460010939 100319475328460010939 No Department of Biological Sciences, Faculty of Science, National University of Singapore, Singapore Mohammad Mehdi Movahednia 100319475328460010940 100319475328460010940 No Oral Sciences Disciplines, Faculty of Dentistry, National University of Singapore, Singapore Jin Fei Yeo 100319475328460010941 100319475328460010941 No Oral Sciences Disciplines, Faculty of Dentistry, National University of Singapore, Singapore Kai Soo Tan 100319475328460010942 100319475328460010942 No Oral Sciences Disciplines, Faculty of Dentistry, National University of Singapore, Singapore Tong Cao dencaot@nus.edu.sg 100319475328460010943 100319475328460010943 Yes Oral Sciences Disciplines, Faculty of Dentistry, National University of Singapore, Singapore