Prosurvival Bcl-2 family members reveal a distinct apoptotic identity between conventional and plasmacytoid dendritic cells
Details
Publication Year 2015-03-31, Volume 112, Issue #13, Page 4044-4049
Journal Title
Proceedings of the National Academy of Sciences of the United States of America
Publication Type
Journal Article
Abstract
Dendritic cells (DCs) are heterogeneous, comprising subsets with functional specializations that play distinct roles in immunity as well as immunopathology. We investigated the molecular control of cell survival of two main DC subsets: plasmacytoid DCs (pDCs) and conventional DCs (cDCs) and their dependence on individual antiapoptotic BCL-2 family members. Compared with cDCs, pDCs had higher expression of BCL-2, lower A1, and similar levels of MCL-1 and BCL-XL. Transgenic overexpression of BCL-2 increased the pDC pool size in vivo with only minor impact on cDCs. With a view to immune intervention, we tested BCL-2 inhibitors and found that ABT-199 (the BCL-2 specific inhibitor) selectively killed pDCs but not cDCs. Conversely, genetic knockdown of A1 profoundly reduced the proportion of cDCs but not pDCs. We also found that conditional ablation of MCL-1 significantly reduced the size of both DC populations in mice and impeded DC-mediated immune responses. Thus, we revealed that the two DC types have different cell survival requirements. The molecular basis of survival of different DC subsets thus advocates the antagonism of selective BCL-2 family members for treating diseases pertaining to distinct DC subsets.
Publisher
National Academy of Sciences
WEHI Research Division(s)
Immunology; Cancer And Haematology; Infection And Immunity; Structural Biology; Molecular Genetics Of Cancer
PubMed ID
25775525
Rights Notice
Refer to copyright notice on published article.


Creation Date: 2015-03-20 02:40:29
Last Modified: 2016-04-20 11:33:31
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