Osteoclast activated FoxP3+ CD8+ T-cells suppress bone resorption in vitro.

Osteoclast activated FoxP3+ CD8+ T-cells suppress bone resorption in vitro.
复制标题

DOI:
10.1371/journal.pone.0038199
复制
发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Aurora R
Aurora R
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Buchwald ZS;Kiesel JR;DiPaolo R;Pagadala MS;Aurora R

文献摘要

参考文献

被引文献

相似文献

破骨细胞是人体唯一的骨吸收细胞。促炎效应 T 细胞 (TEFF) 产生的细胞因子可增加破骨细胞的骨吸收。长期接触 TEFF 产生的细胞因子会导致骨侵蚀疾病,例如骨质疏松症和类风湿性关节炎。 T 细胞和破骨细胞之间的串扰被称为骨免疫学。我们之前已经证明,在非炎症条件下,小鼠破骨细胞可以招募幼稚的 CD8 T 细胞并激活这些 T 细胞以诱导 CD25 和 FoxP3 (TcREG)。破骨细胞激活 CD8 T 细胞还诱导细胞因子 IL-2、IL-6、IL-10 和 IFN-γ。单独而言,这些细胞因子可以激活或抑制破骨细胞吸收。为了确定 TcREG 对破骨细胞活性的净效应,我们使用了许多体外测定。我们发现 TcREG 可以有效、直接抑制破骨细胞的骨吸收。 TcREG可以抑制成熟破骨细胞的分化和吸收,但不影响其存活。此外,我们发现 TcREG 抑制成熟破骨细胞中的细胞骨架重组。破骨细胞对 TcREG 的诱导是抗原依赖性的,而 TcREG 对破骨细胞的抑制不需要抗原或重新刺激。我们证明,IL-6、IL-10 或 IFN-γ 的抗体阻断可缓解抑制。这种抑制不需要 TcREG 和破骨细胞之间的直接接触。我们已经确定破骨细胞诱导的TcREG可以抑制破骨细胞的活性,形成负反馈系统。由于 CD8 T 细胞在没有炎症信号的情况下被激活,这些观察结果表明该调节环路可能在调节骨骼稳态中发挥作用。我们的结果首次证明了 CD8 调节性 T 细胞抑制破骨细胞活性,从而扩展了骨免疫学的范围。
Osteoclasts are the body’s sole bone resorbing cells. Cytokines produced by pro-inflammatory effector T-cells (TEFF) increase bone resorption by osteoclasts. Prolonged exposure to the TEFF produced cytokines leads to bone erosion diseases such as osteoporosis and rheumatoid arthritis. The crosstalk between T-cells and osteoclasts has been termed osteoimmunology. We have previously shown that under non-inflammatory conditions, murine osteoclasts can recruit naïve CD8 T-cells and activate these T-cells to induce CD25 and FoxP3 (TcREG). The activation of CD8 T-cells by osteoclasts also induced the cytokines IL-2, IL-6, IL-10 and IFN-γ. Individually, these cytokines can activate or suppress osteoclast resorption. To determine the net effect of TcREG on osteoclast activity we used a number of in vitro assays. We found that TcREG can potently and directly suppress bone resorption by osteoclasts. TcREG could suppress osteoclast differentiation and resorption by mature osteoclasts, but did not affect their survival. Additionally, we showed that TcREG suppress cytoskeletal reorganization in mature osteoclasts. Whereas induction of TcREG by osteoclasts is antigen-dependent, suppression of osteoclasts by TcREG does not require antigen or re-stimulation. We demonstrated that antibody blockade of IL-6, IL-10 or IFN-γ relieved suppression. The suppression did not require direct contact between the TcREG and osteoclasts. We have determined that osteoclast-induced TcREG can suppress osteoclast activity, forming a negative feedback system. As the CD8 T-cells are activated in the absence of inflammatory signals, these observations suggest that this regulatory loop may play a role in regulating skeletal homeostasis. Our results provide the first documentation of suppression of osteoclast activity by CD8 regulatory T-cells and thus, extend the purview of osteoimmunology.
DOI: 10.1084/jem.190.12.1741
发表时间: 1999-12-20
期刊: The Journal of experimental medicine
影响因子: --
作者:
Arai F;Miyamoto T;Ohneda O;Inada T;Sudo T;Brasel K;Miyata T;Anderson DM;Suda T
通讯作者: Suda T
DOI: 10.1002/ana.21944
发表时间: 2010-05-01
影响因子: 11.2
作者:
Correale, Jorge;Villa, Andres
通讯作者: Villa, Andres
DOI: 10.1006/bbrc.2000.3577
发表时间: 2000-10-05
影响因子: 3.1
作者:
Fox, SW;Chambers, TJ
通讯作者: Chambers, TJ
DOI: 10.1074/jbc.m111663200
发表时间: 2002-06-14
影响因子: 4.8
作者:
Dallas, SL;Rosser, JL;Bonewald, LF
通讯作者: Bonewald, LF
DOI: 10.4049/jimmunol.174.9.5814
发表时间: 2005-05-01
影响因子: 4.4
作者:
Brimnes, J;Allez, M;Mayer, L
通讯作者: Mayer, L