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首页> 外文期刊>Cell biology international. >Histamine promotes the expression of receptors TLR2 and TLR4 and amplifies sensitivity to lipopolysaccharide and lipoteichoic acid treatment in human gingival fibroblasts.
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Histamine promotes the expression of receptors TLR2 and TLR4 and amplifies sensitivity to lipopolysaccharide and lipoteichoic acid treatment in human gingival fibroblasts.

机译:组胺可促进人类牙龈成纤维细胞中受体TLR2和TLR4的表达,并增强对脂多糖和脂磷壁酸治疗的敏感性。

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The vasoactive hydrophilic amine histamine is the most important molecule released by mast cells. However, histamine's role in activating intracellular responses in HGFs (human gingival fibroblasts) has not been evaluated to date. In the present study, we investigated the effect of histamine and of Gram-negative [LPS (lipopolysaccharide)] and Gram-positive [LTA (lipoteichoic acid)] bacterial components on the modulation of the inflammatory response of HGFs. We incubated HGFs with histamine to determine whether this hydrophilic amine regulates overexpression of TLR2 (Toll-like receptor 2) and TLR4, which recognize LTA and LPS respectively. Our experiments demonstrated that histamine increases transcription and translation of TLR2 and TLR4. Incubation with LTA or LPS in the presence of histamine markedly increased expression of COX2 (cyclo-oxygenase 2) and synthesis of prostaglandin E2. These results suggest that histamine plays an important role in modulating the innate immune response, and likewise, that LTA and LPS regulate the adaptive immune response. The present study provides information about the regulation and expression of molecules that promote chronic inflammatory processes leading to the emergence of periodontitis and the consequent loss of the dental organ.
机译:血管活性亲水胺组胺是肥大细胞释放的最重要分子。然而,迄今为止,尚未评估组胺在激活HGF(人牙龈成纤维细胞)的细胞内应答中的作用。在本研究中,我们研究了组胺和革兰氏阴性[LPS(脂多糖)]和革兰氏阳性[LTA(脂多糖)]细菌成分对HGFs炎症反应调节的影响。我们将HGF与组胺一起孵育,以确定这种亲水性胺是否调节TLR2(Toll样受体2)和TLR4(分别识别LTA和LPS)的过表达。我们的实验表明,组胺可增加TLR2和TLR4的转录和翻译。在组胺存在下与LTA或LPS一起孵育可显着增加COX2(环加氧酶2)的表达和前列腺素E2的合成。这些结果表明,组胺在调节先天免疫应答中起重要作用,同样,LTA和LPS调节适应性免疫应答。本研究提供了有关促进慢性炎症过程的分子的调控和表达的信息,这些炎症过程导致牙周炎的出现和随之而来的牙齿器官的损失。

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