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Prosurvival Bcl-2 family members reveal a distinct apoptotic identity between conventional and plasmacytoid dendritic cells.


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.

SUBMITTER: Carrington EM 

PROVIDER: S-EPMC4386329 | biostudies-literature | 2015 Mar

REPOSITORIES: biostudies-literature

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Prosurvival Bcl-2 family members reveal a distinct apoptotic identity between conventional and plasmacytoid dendritic cells.

Carrington Emma M EM   Zhang Jian-Guo JG   Sutherland Robyn M RM   Vikstrom Ingela B IB   Brady Jamie L JL   Soo Priscilla P   Vremec David D   Allison Cody C   Lee Erinna F EF   Fairlie W Douglas WD   Bouillet Philippe P   Grabow Stephanie S   Ottina Eleonora E   Herold Marco J MJ   Pellegrini Marc M   Huang David C S DC   Tarlinton David M DM   Strasser Andreas A   Lew Andrew M AM   Zhan Yifan Y  

Proceedings of the National Academy of Sciences of the United States of America 20150316 13


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  ...[more]

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