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2018 ; 9
(ä): 842
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Loss of Perp in T Cells Promotes Resistance to Apoptosis of T Helper 17 Cells and
Exacerbates the Development of Experimental Autoimmune Encephalomyelitis in Mice
#MMPMID29740445
Zhou Y
; Leng X
; He Y
; Li Y
; Liu Y
; Liu Y
; Zou Q
; Shi G
; Wang Y
Front Immunol
2018[]; 9
(ä): 842
PMID29740445
show ga
T helper 17 (Th17) cells are crucial for the pathogenesis of multiple sclerosis
(MS) in humans and experimental autoimmune encephalomyelitis (EAE) in animals.
High frequency of Th17?cells and low sensitivity to activation-induced cell death
(AICD) are detected in MS patients. However, the mechanisms underlying apoptosis
resistance of T cells remain unclear. Perp is an apoptosis-associated target of
p53 and implicated in the development of cancers. Here, we show that loss of Perp
in T cells does not affect Th1, Th17, or Treg cell differentiation, but does
significantly increase the resistance of Perp(-/-) Th17?cells to AICD and
anti-Fas in Lck-Cre?×?Perp(fl/fl) mice by inhibiting the caspase-dependent
apoptotic pathway. Moreover, Lck-Cre?×?Perp(fl/fl) mice exhibited earlier onset
of EAE and severe spinal cord inflammation and demyelination, accompanied by
increased levels of pro-inflammatory cytokines and enlarged population of
Th17?cells. Therefore, Perp deletion promoted Th17 responses and exacerbated the
development and severity of EAE.