期刊
ANNALS OF DERMATOLOGY
卷 33, 期 5, 页码 402-408出版社
KOREAN DERMATOLOGICAL ASSOC
DOI: 10.5021/ad.2021.33.5.402
关键词
Mast cell; Skin inflammation; Toll-like receptor 7
类别
资金
- National Research Foundation of Korea (NRF) - Korea Government (MSIT) [NRF-2019R1H1A1035603, NRF-2020 R1C1C1012769]
- RP-Grant 2019 of Ewha Womans University
Stimulation of TLR7 leads to increased intracellular structures in mast cells and upregulation of genes involved in pro-inflammatory responses, suggesting a potential therapeutic target for IgE-independent skin inflammation.
Background: Mast cells are skin immune sentinels located in the upper dermis, where wheal formation and sensory nerve stimulation take place. Skin inflammation is occasionally accompanied by mast cell-driven responses with wheals, angioedema, or both. Immunoglobulin E (IgE) antibodies are regarded as typical stimuli to drive mast cell activation. However, various causative factors, including microbial infections, can drive IgE-independent mast cell response. When infected, the innate immunity orchestrates an immune response by activating receptor signaling via Toll-like receptors (TLRs). Objective: In this study, we determined the effect of TLR7 stimulation on mast cells to investigate the possible mechanism of IgE-independent inflammatory response. Methods: Human mast cell (HMC) line, HMC-1 cells were treated with TLR7 agonist and the morphologic alteration was observed in transmission electron microscopy. Further, TLR7 agonist treated HMC-1 cells were conducted to RNA sequencing to compare transcriptomic features. Results: HMC-1 cells treated with TLR7 agonist reveals increase of intracellular vesicles, lipid droplets, and ribosomes. Also, genes involved in pro-inflammatory responses such as angiogenesis are highly expressed, and Il12rb2 was the most highly up regulated gene. Conclusion: Our data suggest that TLR7 signaling on mast cells might be a potential therapeutic target for mast cell-driven, IgE-independent skin inflammation. (Ann Dermatol 33(5) 402 similar to 408, 2021)
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