Osteoclast activated FoxP3+ CD8+ T-cells suppress bone resorption in vitro.
Osteoclast activated FoxP3+ CD8+ T-cells suppress bone resorption in vitro.
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DOI:
10.1371/journal.pone.0038199
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Aurora R
中科院分区:
文献类型:
--
作者:
Buchwald ZS;Kiesel JR;DiPaolo R;Pagadala MS;Aurora R
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.
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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
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
影响因子:
4.8
作者:
Dallas, SL;Rosser, JL;Bonewald, LF
通讯作者:
Bonewald, LF
影响因子:
4.4
作者:
Brimnes, J;Allez, M;Mayer, L
通讯作者:
Mayer, L