Abstract:
:Durable humoral immunity against epidemic infectious disease requires the survival of long-lived plasma cells (LLPCs). LLPC longevity is dependent on metabolic programs distinct from short-lived plasma cells (SLPCs); however, the mechanistic basis for this difference is unclear. We have previously shown that CD28, the prototypic T cell costimulatory receptor, is expressed on both LLPCs and SLPCs but is essential only for LLPC survival. Here we show that CD28 transduces pro-survival signaling specifically in LLPCs through differential SLP76 expression. CD28 signaling in LLPCs increased glucose uptake, mitochondrial mass/respiration, and reactive oxygen species (ROS) production. Unexpectedly, CD28-mediated regulation of mitochondrial respiration, NF-κB activation, and survival was ROS dependent. IRF4, a target of NF-κB, was upregulated by CD28 activation in LLPCs and decreased IRF4 levels correlated with decreased glucose uptake, mitochondrial mass, ROS, and CD28-mediated survival. Altogether, these data demonstrate that CD28 signaling induces a ROS-dependent metabolic program required for LLPC survival.
journal_name
Cell Repjournal_title
Cell reportsauthors
Utley A,Chavel C,Lightman S,Holling GA,Cooper J,Peng P,Liu W,Barwick BG,Gavile CM,Maguire O,Murray-Dupuis M,Rozanski C,Jordan MS,Kambayashi T,Olejniczak SH,Boise LH,Lee KPdoi
10.1016/j.celrep.2020.107815subject
Has Abstractpub_date
2020-06-23 00:00:00pages
107815issue
12issn
2211-1247pii
S2211-1247(20)30796-8journal_volume
31pub_type
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