Interleukin (IL)-6 modulates transforming growth factor-β receptor I and II (TGF-βRI and II) function in epidermal keratinocytes.
Interleukin (IL)-6 modulates transforming growth factor-β receptor I and II (TGF-βRI and II) function in epidermal keratinocytes.
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DOI：
10.1111/exd.13260
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发表时间：
2017-08
影响因子：
3.6
通讯作者：
Gallucci RM
中科院分区：
文献类型：
--
作者：
Luckett-Chastain LR;Cottrell ML;Kawar BM;Ihnat MA;Gallucci RM
It been shown that IL-6 modulates TGF-β1 expression in fibroblasts, however; what role IL-6 plays concerning TGF-βR expression and function in skin is unknown. Therefore, the aim of this study was to investigate the mechanism by which IL-6 might modulates TGF-β receptors in skin. Skin from WT, IL-6 overexpressing mice, and IL-6 treated keratinocyte cultures were analyzed for TGF-βRI and TGF-βRII expression via histology, PCR, and flow cytometry. Receptor function was assessed by cell migration, bromodeoxyuridine (BrdU) proliferation assays, and Smad7 expression and Smad2/3 phosphorylation. Receptor localization within the membrane was determined by co-immunoprecipitation. IL-6 overexpression and treatment increased TGF-βRII expression in the epidermis. IL-6 treatment of keratinocytes induced TGF-βRI and II expression, and augmented TGF-β1-induced function as demonstrated through increased migration and decreased proliferation. Additionally, IL-6 treatment of keratinocytes altered receptor activity as indicated by altered Smad2/3 phosphorylation and increased Smad7 and membrane localization. These results suggest that IL-6 regulates keratinocyte function by modulating TGF-βRI and II expression and signal transduction via trafficking of the receptor to lipid raft pools.
