Abstract:
:Although mast cells are traditionally thought to function as effector cells in allergic responses, they have increasingly been recognized as important regulators of various immune responses. Mast cells mature locally; thus, tissue-specific influences are important for promoting mast cell accumulation and survival in the skin and the gastrointestinal tract. In this study, we determined the effects of keratinocytes on mast cell accumulation during Th17-mediated skin inflammation. We observed increases in dermal mast cells in imiquimod-induced psoriatic dermatitis in mice accompanied by the expression of epidermal stem cell factor (SCF), a critical mast cell growth factor. Similar to mouse epidermal keratinocytes, SCF was highly expressed in the human HaCaT keratinocyte cell line following stimulation with IL-17. Further, keratinocytes promoted mast cell proliferation following stimulation with IL-17 in vitro. However, the effects of keratinocytes on mast cells were significantly diminished in the presence of anti-CD117 (stem cell factor receptor) blocking antibodies. Taken together, our results revealed that the Th17-mediated inflammatory environment promotes mast cell accumulation through keratinocyte-derived SCF.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Cho KA,Park M,Kim YH,Woo SYdoi
10.1016/j.bbrc.2017.04.141subject
Has Abstractpub_date
2017-06-10 00:00:00pages
856-861issue
4eissn
0006-291Xissn
1090-2104pii
S0006-291X(17)30823-9journal_volume
487pub_type
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journal_title:Biochemical and biophysical research communications
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