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Recombinant human thrombomodulin attenuated sepsis severity in a non-surgical preterm mouse model.
Scientific Reports ( IF 3.8 ) Pub Date : 2020-01-15 , DOI: 10.1038/s41598-019-57265-2
Mariko Ashina 1 , Kazumichi Fujioka 1 , Kosuke Nishida 1 , Saki Okubo 1 , Toshihiko Ikuta 1 , Masakazu Shinohara 2 , Kazumoto Iijima 1
Affiliation  

Neonatal sepsis is characterised by dysregulated immune responses. Lipid mediators (LMs) are involved in the regulation of inflammation. Human recombinant thrombomodulin (rhTM), an anticoagulant, has anti-inflammatory effects and might be useful for sepsis treatment. A stock caecal slurry (CS) solution was prepared from adult caeca. To induce sepsis, 1.5 mg/g of CS was administered intraperitoneally to 4 d-old wild-type FVB mouse pups. Saline (Veh-CS) or rhTM (3 or 10 mg/kg; rhTM3-CS or rhTM10-CS) was administered subcutaneously 6 h prior to sepsis induction, and liver LM profiles at 3 and 6 h post-sepsis induction and survival up to 7 days were examined. Mortality was significantly lower (47%) in the rhTM3-CS group and significantly higher (100%) in the rhTM10-CS group, compared with the Veh-CS group (79%, p < 0.05). Eleven LMs (12-HEPE, EPA, 14-HDHA, DHA, PD1, PGD2, 15d-PGJ2, 12S-HHT, lipoxin B4, 12-HETE, AA) were significantly increased at 3 h, and five LMs (5-HEPE, 15-HEPE, 18-HEPE, 17-HDHA, PD1) were significantly increased at 6 h post-sepsis induction. Increased EPA, DHA, 12S-HHT, lipoxin B4, and AA were significantly suppressed by rhTM pre-treatment. rhTM was protective against neonatal sepsis. This protective effect might be mediated via LM modulation. Further post-sepsis studies are needed to determine clinical plausibility.

中文翻译:

在非手术早产儿小鼠模型中重组人血栓调节蛋白可减轻败血症严重程度。

新生儿败血症的特征是免疫反应失调。脂质介质(LMs)参与炎症的调节。人重组血栓调节蛋白(rhTM)是一种抗凝剂,具有抗炎作用,可能对败血症的治疗有用。从成年盲肠制备盲肠淤浆(CS)储备溶液。为了诱导败血症,将腹膜内施用1.5mg / g的CS至4d龄的野生型FVB小鼠幼崽。在败血症诱导前6 h皮下注射生理盐水(Veh-CS)或rhTM(3或10 mg / kg; rhTM3-CS或rhTM10-CS),并在脓毒症诱导后3和6 h进行肝LM监测,直至存活至7天进行检查。与Veh-CS组相比,rhTM3-CS组的死亡率显着降低(47%),而在rhTM10-CS组中的死亡率显着更高(100%)(79%,p <0.05)。11个LM(12-HEPE,EPA,14-HDHA,DHA,PD1,PGD2、15d-PGJ2、12S-HHT,脂蛋白B4、12-HETE,AA)在3 h时显着增加,并且5个LMs(5-HEPE,15-HEPE,18-HEPE,败血症诱导后6 h,17-HDHA,PD1)明显增加。rhTM预处理可显着抑制EPA,DHA,12S-HHT,脂蛋白B4和AA的升高。rhTM对新生儿败血症具有保护作用。此保护作用可能是通过LM调制介导的。需要进一步的脓毒症后研究以确定临床的合理性。rhTM对新生儿败血症具有保护作用。此保护作用可能是通过LM调制介导的。需要进一步的脓毒症后研究以确定临床的合理性。rhTM对新生儿败血症具有保护作用。此保护作用可能是通过LM调制介导的。需要进一步的脓毒症后研究以确定临床的合理性。
更新日期:2020-01-15
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