Abstract:
:Diabetes-induced neutrophil NETosis impairs wound healing through neutrophil extracellular traps (NETs). Reactive oxygen species (ROS)-triggered activation of mitogen-activated protein kinase (MAPK) ERK1/2 and p38 is involved in NETosis. Hydrogen sulfide (H2S), an endogenous signaling molecule, accelerates diabetic wound healing (DWH), and inhibits ROS production, ERK1/2 and p38 activation, while its level is decreased in diabetes. However, it remains unknown whether H2S could accelerate DWH through inhibition of NETosis, and whether this inhibitory effect was associated with blockage of ROS-induced ERK1/2 and p38 activation. In order to solve these problems, serum NETs content was measured in diabetic foot patients and healthy individuals. Wound was created in dorsal skin of LepRdb/db and control mice and NETs content in wound tissues was tested. An in vitro NETosis model was induced by phorbol 12-myristate 13-acetate (PMA) in isolated neutrophils. Effects of H2S in form of Na2S on skin wound healing and NETosis were investigated both in vivo and in vitro. It was found that NETs level was highly increased in diabetic foot patients. Comparing with LepRm+/db mice, DWH was delayed in LepRdb/db mice, accompanied with high NETs level. In PMA-induced NETosis model, peptidylarginine deiminase (PAD)-4 and citrullinated histone H3, as well as NETs components dsDNA framework, myeloperoxidase and neutrophil elastase, were significantly increased. PMA-induced neutrophil NETosis and NETs formation were abolished by treatment with H2S. The delayed DWH of diabetic mice was partially restored by intraperitoneal injection of H2S, meanwhile, the highly expressed NETosis and NETs release were also down-regulated. The treatment with H2S not only attenuated ROS production but also abolished MAPK ERK1/2 and p38 activation. Like the effects of H2S, inhibition of MAPK ERK1/2 or p38 could decrease NETs release. These findings suggests that H2S attenuates NETosis and primes diabetic wound to heal through blockage of ROS-mediated MAPK ERK1/2 and p38 activation.
journal_name
Mol Cell Endocrinoljournal_title
Molecular and cellular endocrinologyauthors
Yang CT,Chen L,Chen WL,Li N,Chen MJ,Li X,Zheng X,Zhao YZ,Wu YX,Xian M,Liu Jdoi
10.1016/j.mce.2018.10.013subject
Has Abstractpub_date
2019-01-15 00:00:00pages
74-82eissn
0303-7207issn
1872-8057pii
S0303-7207(18)30308-3journal_volume
480pub_type
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