Int Arch Allergy Immunol:地塞米松通过触发肥大细胞中的角质形成细胞生长因子促进角质形成细胞的增殖

2019-03-27 不详 网络

皮肤是一个动态的身体器官,可以通过中枢和局部下丘脑-垂体-肾上腺轴系统激活。这种现象可能是压力导致慢性炎症性皮肤病(如牛皮癣)复发的重要原因。在这里,我们确定了肥大细胞对应激激素刺激下角质形成细胞增殖的影响。我们在小鼠的剃毛背部皮下注射地塞米松,并评估真皮肥大细胞上的组织学变化和角质形成细胞生长因子(KGF)表达。此外,在体外用地塞米松处理人肥大细胞系(HMC-1)和角质形成细胞系(HaCaT)细

皮肤是一个动态的身体器官,可以通过中枢和局部下丘脑-垂体-肾上腺轴系统激活。这种现象可能是压力导致慢性炎症性皮肤病(如牛皮癣)复发的重要原因。在这里,我们确定了肥大细胞对应激激素刺激下角质形成细胞增殖的影响。

我们在小鼠的剃毛背部皮下注射地塞米松,并评估真皮肥大细胞上的组织学变化和角质形成细胞生长因子(KGF)表达。此外,在体外用地塞米松处理人肥大细胞系(HMC-1)和角质形成细胞系(HaCaT)细胞,以观察增殖程度和KGF的表达。最后,用地塞米松处理的HMC-1细胞的上清液用于培养HaCaT细胞以研究其对增殖的影响。

结果显示,注射地塞米松的小鼠的表皮增厚,伴随着表达KGF的真皮肥大细胞数量的增加。与小鼠皮肤肥大细胞相似,在用地塞米松刺激后,KGF在人肥大细胞系HMC-1中高表达。此外,地塞米松处理的肥大细胞在体外促进角质形成细胞增殖。然而,在存在抗KGF阻断抗体的情况下,肥大细胞对角质形成细胞的作用明显降低。

总之,我们的结果表明,压力环境可能通过肥大细胞衍生的KGF表达扰乱皮肤屏障稳态。


原始出处:

Cho KA, Kim HJ, et al., Dexamethasone Promotes Keratinocyte Proliferation by Triggering Keratinocyte Growth Factor in Mast Cells. Int Arch Allergy Immunol. 2019 Mar 25:1-9. doi: 10.1159/000494624.

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