Effects of lidocaine on peripheral blood mononuclear cells from patients with atopic dermatitis stimulated by the Staphylococcus aureus exotoxin TSST-1
10.3760/cma.j.issn.0412-4030.2015.01.010
- VernacularTitle:利多卡因对金黄色葡萄球菌外毒素TSST-1刺激的特应性皮炎患者外周血单一核细胞的影响
- Author:
Yuanyuan WANG
;
Mingjie HU
;
Jing ZHANG
;
Yinjiu HUANG
;
Bikui TANG
;
Changjie CHEN
;
Shouwei WU
- Publication Type:Journal Article
- Keywords:
Atopic dermatitis;
Staphylococcus aureus;
Exotoxins;
Lidocaine;
Monocytes
- From:
Chinese Journal of Dermatology
2015;48(1):28-32
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effect of lidocaine on Staphylococcus aureus exotoxin-stimulated peripheral blood mononuclear cells (PBMCs) from patients with atopic dermatitis (AD).Methods Peripheral blood samples were collected from 6 patients with AD,and PBMCs were isolated by a routine method.Then,the PBMCs were stimulated by the Staphylococcus aureus exotoxin toxic shock syndrome toxin-1 (TSST-1) in the absence or presence of lidocaine at varying concentrations.The 3H-TdR incorporation method was performed to detect the proliferation of monocytes,and enzyme-linked immunosorbent assay (ELISA) to quantify the levels of T helper type 1 (Th1) and Th2 cytokines released by PBMCs.Human HaCaT keratinocytes were co-cultured with lidocaine-and TSST-1-stimulated PBMCs from patients with AD for 72 hours,then,Western blot was conducted to examine the expression of filaggrin protein in HaCaT cells.Results TSST-1 (100 μg/L) significantly enhanced the proliferation of PBMCs from patients with AD (stimulation index =75 ± 2.12,P ＜ 0.05),as well as the release of tumor necrosis factor-α (TNF-α),interferon (IFN)-γ,interleukin (IL)-2,IL-12,IL-4,IL-5 and IL-13 by the PBMCs (all P ＜ 0.05).Compared with the blank control group,100 μmol/L lidocaine significantly inhibited the TSST-1-stimulated proliferation of PBMCs from patients with AD (stimulation index =58 ± 3.14,P＜ 0.05),as well as the release of IL-4,IL-5,IL-13,TNF-α and IFN-γ by the stimulated PBMCs (all P ＜ 0.05).Western blot showed that 100 μmol/L lidocaine significantly blocked the down-regulation of filaggrin expression in HaCaT cells (P ＜ 0.01).Conclusion Lidocaine has a significant inhibitory effect on the activation of TSST-1-stimulated PBMCs from patients with AD.
