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2018 ; 24
(ä): 1225-1231
Nephropedia Template TP
gab.com Text
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English Wikipedia
Tetramethylpyrazine Showed Therapeutic Effects on Sepsis-Induced Acute Lung
Injury in Rats by Inhibiting Endoplasmic Reticulum Stress Protein Kinase RNA-Like
Endoplasmic Reticulum Kinase (PERK) Signaling-Induced Apoptosis of Pulmonary
Microvascular Endothelial Cells
#MMPMID29488473
Liu W
; Liu K
; Zhang S
; Shan L
; Tang J
Med Sci Monit
2018[Feb]; 24
(ä): 1225-1231
PMID29488473
show ga
BACKGROUND Acute lung injury (ALI) is a life-threatening complication of sepsis.
Tetramethylpyrazine (TMP) has been used in the clinical treatment of vascular
diseases. The aim of this study was to investigate the therapeutic effects and
possible involved mechanisms on ALI. MATERIAL AND METHODS Cecal ligation and
puncture (CLP) was used to establish a sepsis model in rats. TMP at various
dosages were administrated to rats using a intragastric method. Animal survival
rate was calculated. The lung functions were evaluated by lung weight/dry weight
ratio (W/D), PaO2, dynamic compliance (DC), and airway resistance index (ARI).
Pulmonary microvascular endothelial cells (PMVECs) were isolated from lungs
harvested from rats with sepsis. TUNEL assay was used to detect apoptosis.
Protein expression and phosphorylation levels were assessed by western blotting.
RESULTS TMP administration increased the survival rate of septic rats. TMP also
decreased W/D and DC, but increased PaO2 and ARI in septic rats. Moreover, PMVECs
apoptosis was inhibited in septic rats that received TMP treatment. The
expression levels of GRP78, ATF4, caspase-12, active caspase-3, as well as the
phosphorylation levels of PERK and eIF2? were suppressed in PMVECs isolated from
TMP-treated septic rats. CONCLUSIONS TMP alleviated sepsis-induced ALI by
suppressing PMVECs apoptosis via PERK/eIF2?/ATF4/CHOP apoptotic signaling in
endoplasmic reticulum stress.