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2016 ; 213
(12
): 1990-5
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Swift Intrahepatic Accumulation of Granulocytic Myeloid-Derived Suppressor Cells
in a Humanized Mouse Model of Toxic Shock Syndrome
#MMPMID26908735
Szabo PA
; Goswami A
; Memarnejadian A
; Mallett CL
; Foster PJ
; McCormick JK
; Haeryfar SM
J Infect Dis
2016[Jun]; 213
(12
): 1990-5
PMID26908735
show ga
Toxic shock syndrome (TSS) and other superantigen-mediated illnesses are
associated with 'systemic' immunosuppression that jeopardizes the host's ability
to fight pathogens. Here, we define a novel mechanism of 'local'
immunosuppression that may benefit the host. Systemic exposure to staphylococcal
enterotoxin B (SEB) rapidly and selectively recruited CD11b(+)Gr-1(high)Ly-6C(+)
granulocytic myeloid-derived suppressor cells (MDSCs) to the liver of HLA-DR4
transgenic mice. Hepatic MDSCs inhibited SEB-triggered T cell proliferation in a
reactive oxygen species-dependent manner, and ex vivo-generated human MDSCs also
similarly attenuated the proliferative response of autologous T cells to SEB. We
propose a role for MDSCs in mitigating excessive tissue injury during TSS.