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2016 ; 7
(15
): 19367-81
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Necrostatin-1 enhances the resolution of inflammation by specifically inducing
neutrophil apoptosis
#MMPMID27027357
Jie H
; He Y
; Huang X
; Zhou Q
; Han Y
; Li X
; Bai Y
; Sun E
Oncotarget
2016[Apr]; 7
(15
): 19367-81
PMID27027357
show ga
Neutrophils play a central role in innate immunity and are rapidly recruited to
sites of infection and injury. Neutrophil apoptosis is essential for the
successful resolution of inflammation. Necrostatin-1
(Nec-1,methyl-thiohydantoin-tryptophan (MTH-Trp)), is a potent and specific
inhibitor of necroptosis[1] (a newly identified type of cell death representing a
form of programmed necrosis or regulated non apoptotic cell death) by inhibiting
the receptor interacting protein 1(RIP1) kinase. Here we report that Nec-1
specifically induces caspase-dependent neutrophils apoptosis and overrides
powerful anti-apoptosis signaling from survival factors such as GM-CSF and LPS.
We showed that Nec-1 markedly enhanced the resolution of established
neutrophil-dependent inflammation in LPS-induced acute lung injury in mice. We
also provided evidence that Nec-1 promoted apoptosis by reducing the expression
of the anti-apoptotic protein Mcl-1 and increasing the expression of
pro-apoptotic protein Bax. Thus, Nec-1 is not only an inhibitor of necroptosis,
but also a promoter of apoptosis, of neutrophils, enhancing the resolution of
established inflammation by inducing apoptosis of inflammatory cells. Our results
suggest that Nec-1 may have potential roles for the treatment of diseases with
increased or persistent inflammatory responses.