Splenic stroma drives mature dendritic cells to differentiate into regulatory dendritic cells.
The fates of dendritic cells (DCs) after antigen presentation have been studied extensively, but the influence of lymphoid microenvironments on DCs is mostly unknown. Here, using splenic stromal cells to mimic the immune microenvironment, we show that contact with stromal cells promoted mature DCs to proliferate in a fibronectin-dependent way and that both stromal cell contact and stromal cell-derived transforming growth factor-beta induced their differentiation into a new regulatory DC subset. We have identified an in vivo counterpart in the spleen with similar phenotype and functions. These differentiated DCs secreted nitric oxide, which mediated the suppression of T cell proliferation in response to antigen presentation by mature DCs. Thus, our findings identify an important mechanism by which the microenvironment regulates immune responses.
The Institute of Immunology, Second Military Medical University, Shanghai, China.
Minghui
M
Zhang
Hua
H
Tang
Zhenhong
Z
Guo
Huazhang
H
An
Xuejun
X
Zhu
Wengang
W
Song
Jun
J
Guo
Xin
X
Huang
Taoyong
T
Chen
Jianli
J
Wang
Xuetao
X
Cao
D000818:Animals; D002454:Cell Differentiation / Q000276:immunology*; D002455:Cell Division / Q000502:physiology; D003713:Dendritic Cells / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D017930:Genes, Reporter; D051379:Mice; D009569:Nitric Oxide / Q000378:metabolism; D013154:Spleen / Q000166:cytology / Q000276:immunology* / Q000378:metabolism; D017154:Stromal Cells / Q000276:immunology*; D013601:T-Lymphocytes / Q000166:cytology / Q000276:immunology
D009569:Nitric Oxide