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J Endod:人牙髓成纤维细胞通过补体活性发挥吞噬作用

2019-05-08 lishiting MedSci原创

之前的研究表明,人牙髓成纤维细胞能够合成所有补体成分。牙髓中的局部补体活性涉及炎症和再生过程,同时也通过形成膜攻击复合物参与致病破坏过程。通过补体介导吞噬作用的灭菌暗示着补体C3b蛋白对微生物的调理作用,C3b蛋白能够在随后的细胞破坏过程中被特殊的吞噬细胞CR1受体识别。这篇研究的目的是为了评估人牙髓成纤维细胞是否能够产生C3b并检测它们在随后的细菌吞噬中是否发挥作用。

之前的研究表明,人牙髓成纤维细胞能够合成所有补体成分。牙髓中的局部补体活性涉及炎症和再生过程,同时也通过形成膜攻击复合物参与致病破坏过程。通过补体介导吞噬作用的灭菌暗示着补体C3b蛋白对微生物的调理作用,C3b蛋白能够在随后的细胞破坏过程中被特殊的吞噬细胞CR1受体识别。这篇研究的目的是为了评估人牙髓成纤维细胞是否能够产生C3b并检测它们在随后的细菌吞噬中是否发挥作用。

研究检测致龋和健康人牙髓组织中C3b表达。为了体外模拟细菌感染,培养的人牙髓成纤维细胞施以脂膜酸刺激,通过酶联免疫吸附测定检测C3b分泌。IF检测细菌的C3b固定以及炎症性THP-1细胞补体受体1表达情况。采用庆大霉素保护测试检测成纤维细胞C3b分泌在细菌吞噬过程中的作用。

结果显示,牙髓细胞体内持续表达C3b,培养的人牙髓成纤维细胞产生C3b。可观察到C3b蛋白在细菌表面的固定和THP-1 CR1受体的表达。这种识别嫩巩固增加细菌吞噬作用。

结论:结果表明,牙髓成纤维细胞是通过产生补体C3b蛋白和调理细菌介导吞噬作用。这标志着成纤维细胞在牙髓局部调控感染中发挥着重要的作用。

原始出处:

Le Fournis C, Hadjichristou C, et al. Human Pulp Fibroblast Implication in Phagocytosis via Complement Activation. J Endod. 2019 May;45(5):584-590. doi: 10.1016/j.joen.2018.10.023. Epub 2019 Apr 4.

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    2019-06-02 jxrzshh
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