Cytokine-like protein 1 enhances the pro-inflammatory functions of neutrophils in septic mice / 中华急诊医学杂志

Objectives:To analyze the effect of cytokine-like protein 1 (CYTL1) on the pro-inflammatory functions of neutrophils in septic mice.Methods:C57BL/6 mice were randomly (random number)divided into the sepsis group and control group, with 6-12 mice in each group. A septic mouse model was established by the procedure of cecal ligation and puncture (CLP). Neutrophils were isolated from peripheral venous blood 8 h after the procedures according to the density gradient centrifugation method, and the neutrophils were treated with CYTL1 recombinant protein. The Boyden chemotaxis assays were used to detect the activity of CYTL1. fMLF and interleukin-8 were used as positive controls. Phagocytosis was determined by confocal microscopy or on a FACSVerse. Reactive oxygen species generation in neutrophils were monitored with the commercial CellROX Green fluorescent probe.Results:Compared with the control group, CYTL1 showed strong chemotactic activity on neutrophils of septic mice [(10.0 ± 2) vs (66.3 ± 4), t=-21.6, P <0.0001]. CYTL1 has stronger chemotactic activity than IL-8 [(66.3 ± 4.0) vs (21.7 ± 6.5), t = 10.1, P = 0.001]. But the chemotactic activity of fMLF and CYTL1 changed little on neutrophils of septic mice [(66.3 ± 4.0) vs (86.0 ± 13.5), t=-2.4, P = 0.073]. CYTL1 could augment the uptake of E.coli by neutrophils compared with the sepsis group [(7.35 ± 1.66) vs (2.84 ± 0.62), t = 4.4, P = 0.012]. The number of E.coli particles swallowed intracellular by a single cell significantly increased upon the stimulation of CYTL1. CYTL1 could also enhance the intracellular reactive oxygen species production of neutrophils of septic mice [(84340.1 ± 5353.5) vs (351018.7 ± 72291.7), t = 6.4, P = 0.003]. Conclusions:CYTL1 can prompt the pro-inflammatory functions of neutrophils in septic mice. In the early phase of bacterial infection, this protein may play an important role in regulating the inflammation.

Risk factors associated with myocardial injury after non-cardiac major surgery in ICU admitted patients / 中华普通外科杂志

Objective To analyze the risk factors related to the myocardial injury after non-cardiac surgery (MINS) in patients who underwent major abdominal surgery.Methods The clinical data of all patients admitted in the surgical ICU of Peking University People's Hospital from Jan 2016 to Dec 2018 were analyzed.Logistic multivariate analysis was performed to analyze the association of clinical characteristics with the incidence of MINS.Results A total of 322 patients were included,48.4％ (156/322) were diagnosed as with MINS.97.4％ (152/156) of MINS occurred during the first 72 h of admission.Multivariate analysis showed that independent predictive factors of MINS were age ＞ 65y (OR =1.747,P =0.021),body mass index (OR =1.085,P =0.008),acute physiology and chronic health evaluation Ⅱ (APACHE Ⅱ,OR =1.066;P =0.047),hypertension (OR =1.747,P =0.027),blood lactate (OR =1.393,P=0.001) and acute kidney injury (OR=2.065,P=0.047).Conclusions The incidence ofMINS in patients who underwent major abdominal surgery was high.Age,body mass index,APACHE Ⅱ score,hypertension,blood lactate level and acute kidney injury after surgery were independent risk factors of MINS.

Risk factors associated with myocardial injury after non-cardiac major surgery in ICU admitted patients / 中华普通外科杂志

Objective@#To analyze the risk factors related to the myocardial injury after non-cardiac surgery (MINS) in patients who underwent major abdominal surgery.@*Methods@#The clinical data of all patients admitted in the surgical ICU of Peking University People′s Hospital from Jan 2016 to Dec 2018 were analyzed. Logistic multivariate analysis was performed to analyze the association of clinical characteristics with the incidence of MINS.@*Results@#A total of 322 patients were included, 48.4% (156/322) were diagnosed as with MINS. 97.4% (152/156) of MINS occurred during the first 72 h of admission. Multivariate analysis showed that independent predictive factors of MINS were age >65y (OR=1.747, P=0.021), body mass index (OR=1.085, P=0.008), acute physiology and chronic health evaluation Ⅱ (APACHE Ⅱ, OR=1.066; P=0.047), hypertension (OR=1.747, P=0.027), blood lactate (OR=1.393, P=0.001) and acute kidney injury (OR=2.065, P=0.047).@*Conclusions@#The incidence of MINS in patients who underwent major abdominal surgery was high. Age, body mass index, APACHE Ⅱ score, hypertension, blood lactate level and acute kidney injury after surgery were independent risk factors of MINS.