BACKGROUND:Fluid management is crucial to acute respiratory distress syndrome(ARDS)secondary to sepsis.However,choices of fluid resuscitation strategies and fluid input volumes remain a thorny problem.Our study aimed ...BACKGROUND:Fluid management is crucial to acute respiratory distress syndrome(ARDS)secondary to sepsis.However,choices of fluid resuscitation strategies and fluid input volumes remain a thorny problem.Our study aimed to elucidate the relationship between fluid balance and prognosis of ARDS patients secondary to sepsis.METHODS:Our study included 322 sepsis patients from Ruijin Hospital between 2014 and 2018,and 84 patients were diagnosed as ARDS within 72 hours after onset of sepsis according to Berlin ARDS Defi nition.RESULTS:Among the 322 sepsis patients,84(26.1%)were complicated with ARDS within 72 hours.ARDS patients had a lower oxygenation index(PaO2/FiO2166.4±71.0 vs.255.0±91.2,P<0.05),longer duration of mechanical ventilation(11[6-24]days vs.0[0-0]days,P<0.05)than those without ARDS.Sepsis patients with ARDS showed daily positive net fl uid balance during seven days compared with those without ARDS who showed daily negative net fluid balance since the second day with signifi cant statistical differences.Among the 84 sepsis patients with ARDS,58(69.0%)died.Mean daily fl uid input volumes were much lower in survivors than in non-survivors(43.2±16.7 mL/kg vs.51.0±25.2 mL/kg,P<0.05)while output volumes were much higher in survivors(45.2±19.8 mL/kg vs.40.2±22.7 mL/kg,P<0.05).Using binary logistic regression analysis,we found that the mean daily fl uid balance was independently associated with mortality of sepsis patients complicating with ARDS(P<0.05).CONCLUSIONS:Early negative fluid balance is independently associated with a better prognosis of sepsis patients complicated with ARDS.展开更多
AIM: To identify the two polymorphisms of microsomal triglyceride transfer protein (MTP) gene in the Chinese population and to explore their correlation with both hepatitis B virus (HBV) self-limited infection and per...AIM: To identify the two polymorphisms of microsomal triglyceride transfer protein (MTP) gene in the Chinese population and to explore their correlation with both hepatitis B virus (HBV) self-limited infection and persistent infection. METHODS: A total of 316 subjects with self-limited HBV infection and 316 patients with persistent HBV infection (195 subjects without familial history), matched with age and sex, from the Chinese Han population were enrolled in this study. Polymorphisms of MTP at the promoter region -493 and at H297Q were determined by the allele specific polymerase chain reaction (PCR). RESULTS: The ratio of males to females was 2.13:1 for each group and the average age in the self-limited and chronic infection groups was 38.36 and 38.28 years, respectively. None of the allelic distributions deviated significantly from that predicted by the Hardy-Weinberg equilibrium. There was a linkagedisequilibrium between H297Q and -493G/T (D’ = 0.77). As the χ2 test was used, the genotype distribution of MTP -493G/T demonstrated a significant difference between the self-limited infection group and the entire chronic group or the chronic patients with no family history (χ2 = 8.543, P = 0.015 and χ2 = 7.199, P = 0.019). The allele distribution at the MTP-493 position also demonstrated a significant difference between the study groups without family history (χ2 = 6.212, P = 0.013). The T allele emerged as a possible protective factor which may influence the outcomes of HBV infection (OR: 0.59; 95% CI: 0.389-0.897). CONCLUSION: The polymorphism of the MTP gene, T allele at -493, may be involved in determining the HBV infection outcomes, of which the mechanism needs to be further investigated.展开更多
The nitrogen doping/infusion of 650 MHz cavities for the circular electron positron collider(CEPC)is investigated in this study.Two 650 MHz 1-cell cavities are first treated via buffered chemical polishing(BCP),follow...The nitrogen doping/infusion of 650 MHz cavities for the circular electron positron collider(CEPC)is investigated in this study.Two 650 MHz 1-cell cavities are first treated via buffered chemical polishing(BCP),followed by nitrogen doping.A"2/6"condition is adopted,similar to that for 1.3 GHz cavities of Linear Coherent Light Source II.The quality factor of both cavities improved to 7×10^(10)in low fields,i.e.,higher than that obtained from the baseline test.One 650 MHz two-cell cavity is nitrogen infused at 165℃for 48 h with a BCP surface base.The intrinsic quality factor(Q0)reached6×10^(10)at 22 MV/m in the vertical test,and the maximum gradient is 25 MV/m,which exceeds the specification of the CEPC(4×10^(10)at 22 MV/m).展开更多
Background: The expression of dendritic cell-specific intercellular adhesion molecule 3-grabbing nonintegrin (DC-SIGN) in renal tubular epithelial cells has been thought to be highly correlated with the occurrence ...Background: The expression of dendritic cell-specific intercellular adhesion molecule 3-grabbing nonintegrin (DC-SIGN) in renal tubular epithelial cells has been thought to be highly correlated with the occurrence of several kidney diseases, but whether it takes place in renal tissues during hemorrhagic shock (HS) is unknown. The present study airned to investigate this phenomenon and the inhibitory effect of Vitamin C (VitC). Methods: A Sprague Dawley rat HS model was established in vivo in this study. The expression level and location of DC-SIGN were observed in kidneys. Also, the degree of histological damage, the concentrations of tumor necrosis factor-or and interleukin-6 in the renal tissues, and the serum concentration of blood urea nitrogen and creatinine at different times (2-24 h) alter HS (six rats in each group), with or without VitC treatment belbre resuscitation, were evaluated. Results: HS induced DC-SIGN expression in rat tubular epithelial cells. The proinflarnmatory cytokine concentration, histological damage scores, and functional injury of kidneys had increased. All these phenornena induced by HS were relieved when the rats were treated with VitC before resuscitation. Conclusions: The results of the present study illustrated that HS could induce tubular epithelial cells expressing DC-SIGN, and the levels of proinflarnmatory cytokines in the kidney tissues improved correspondingly. The results also indicated that VitC could suppress the DC-SIGN expression in the tubular epithelial cells induced by HS and alleviate the inflammation and functional injury in the kidney.展开更多
基金Shanghai Shenkang Hospital Development Center of China(SHDC12017116)Program for Outstanding Medical Academic,Shanghai Municipal Committee of Science and Technology(184119500900)+1 种基金Shanghai Municipal Commission of Health and Family Planning(2016ZB0206,ZHYY-ZXYJHZX-1-201702)and Shanghai Jiao Tong University School of Medicine(DLY201803)to Er-zhen ChenShanghai Municipal Commission of Health and Family Planning(201640089)to Zhi-tao Yang.
文摘BACKGROUND:Fluid management is crucial to acute respiratory distress syndrome(ARDS)secondary to sepsis.However,choices of fluid resuscitation strategies and fluid input volumes remain a thorny problem.Our study aimed to elucidate the relationship between fluid balance and prognosis of ARDS patients secondary to sepsis.METHODS:Our study included 322 sepsis patients from Ruijin Hospital between 2014 and 2018,and 84 patients were diagnosed as ARDS within 72 hours after onset of sepsis according to Berlin ARDS Defi nition.RESULTS:Among the 322 sepsis patients,84(26.1%)were complicated with ARDS within 72 hours.ARDS patients had a lower oxygenation index(PaO2/FiO2166.4±71.0 vs.255.0±91.2,P<0.05),longer duration of mechanical ventilation(11[6-24]days vs.0[0-0]days,P<0.05)than those without ARDS.Sepsis patients with ARDS showed daily positive net fl uid balance during seven days compared with those without ARDS who showed daily negative net fluid balance since the second day with signifi cant statistical differences.Among the 84 sepsis patients with ARDS,58(69.0%)died.Mean daily fl uid input volumes were much lower in survivors than in non-survivors(43.2±16.7 mL/kg vs.51.0±25.2 mL/kg,P<0.05)while output volumes were much higher in survivors(45.2±19.8 mL/kg vs.40.2±22.7 mL/kg,P<0.05).Using binary logistic regression analysis,we found that the mean daily fl uid balance was independently associated with mortality of sepsis patients complicating with ARDS(P<0.05).CONCLUSIONS:Early negative fluid balance is independently associated with a better prognosis of sepsis patients complicated with ARDS.
基金F.Hoffmann-La Roche Ltd Switzerland and the National High Technology ResearchDevelopment Program of China (863 Program), No. 2006AA02A411
文摘AIM: To identify the two polymorphisms of microsomal triglyceride transfer protein (MTP) gene in the Chinese population and to explore their correlation with both hepatitis B virus (HBV) self-limited infection and persistent infection. METHODS: A total of 316 subjects with self-limited HBV infection and 316 patients with persistent HBV infection (195 subjects without familial history), matched with age and sex, from the Chinese Han population were enrolled in this study. Polymorphisms of MTP at the promoter region -493 and at H297Q were determined by the allele specific polymerase chain reaction (PCR). RESULTS: The ratio of males to females was 2.13:1 for each group and the average age in the self-limited and chronic infection groups was 38.36 and 38.28 years, respectively. None of the allelic distributions deviated significantly from that predicted by the Hardy-Weinberg equilibrium. There was a linkagedisequilibrium between H297Q and -493G/T (D’ = 0.77). As the χ2 test was used, the genotype distribution of MTP -493G/T demonstrated a significant difference between the self-limited infection group and the entire chronic group or the chronic patients with no family history (χ2 = 8.543, P = 0.015 and χ2 = 7.199, P = 0.019). The allele distribution at the MTP-493 position also demonstrated a significant difference between the study groups without family history (χ2 = 6.212, P = 0.013). The T allele emerged as a possible protective factor which may influence the outcomes of HBV infection (OR: 0.59; 95% CI: 0.389-0.897). CONCLUSION: The polymorphism of the MTP gene, T allele at -493, may be involved in determining the HBV infection outcomes, of which the mechanism needs to be further investigated.
基金supported by the National Key Program for S&T Research and Development(No.2016YFA0400400)the Platform of Advanced Photon Source Technology R&D,National Natural Science Foundation of China(No.11505197).
文摘The nitrogen doping/infusion of 650 MHz cavities for the circular electron positron collider(CEPC)is investigated in this study.Two 650 MHz 1-cell cavities are first treated via buffered chemical polishing(BCP),followed by nitrogen doping.A"2/6"condition is adopted,similar to that for 1.3 GHz cavities of Linear Coherent Light Source II.The quality factor of both cavities improved to 7×10^(10)in low fields,i.e.,higher than that obtained from the baseline test.One 650 MHz two-cell cavity is nitrogen infused at 165℃for 48 h with a BCP surface base.The intrinsic quality factor(Q0)reached6×10^(10)at 22 MV/m in the vertical test,and the maximum gradient is 25 MV/m,which exceeds the specification of the CEPC(4×10^(10)at 22 MV/m).
文摘Background: The expression of dendritic cell-specific intercellular adhesion molecule 3-grabbing nonintegrin (DC-SIGN) in renal tubular epithelial cells has been thought to be highly correlated with the occurrence of several kidney diseases, but whether it takes place in renal tissues during hemorrhagic shock (HS) is unknown. The present study airned to investigate this phenomenon and the inhibitory effect of Vitamin C (VitC). Methods: A Sprague Dawley rat HS model was established in vivo in this study. The expression level and location of DC-SIGN were observed in kidneys. Also, the degree of histological damage, the concentrations of tumor necrosis factor-or and interleukin-6 in the renal tissues, and the serum concentration of blood urea nitrogen and creatinine at different times (2-24 h) alter HS (six rats in each group), with or without VitC treatment belbre resuscitation, were evaluated. Results: HS induced DC-SIGN expression in rat tubular epithelial cells. The proinflarnmatory cytokine concentration, histological damage scores, and functional injury of kidneys had increased. All these phenornena induced by HS were relieved when the rats were treated with VitC before resuscitation. Conclusions: The results of the present study illustrated that HS could induce tubular epithelial cells expressing DC-SIGN, and the levels of proinflarnmatory cytokines in the kidney tissues improved correspondingly. The results also indicated that VitC could suppress the DC-SIGN expression in the tubular epithelial cells induced by HS and alleviate the inflammation and functional injury in the kidney.