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Objective:To investigate the clinical characteristics of patients with acute aortic dissection (AAD) through a retrospective and observational study, and to construct an early warning model of AAD that could be used in the emergency room.Methods:The data of 11 583 patients in the Emergency Chest Pain Center from January to December 2019 were retrospectively collected from the Chest Pain Database of Zhongshan Hospital Affiliated to Fudan University. Inclusion criteria: patients with chest pain who attended the Emergency Chest Pain Center between January and December 2019. Exclusion criteria were 1) younger than 18 years, 2) no chest/back pain, 3) patients with incomplete clinical information, and 4) patients with a previous definite diagnosis of aortic dissection who had or had not undergone surgery. The clinical data of 9668 patients with acute chest/back pain were finally collected, excluding 53 patients with previous definite diagnosis of AAD and/or without surgical aortic dissection. A total of 9 615 patients were enrolled as the modeling cohort for early diagnosis of AAD. The patients were divided into the AAD group and non-AAD group according to whether AAD was diagnosed. Risk factors were screened by univariate and multivariate logistic regression, the best fitting model was selected for inclusion in the study, and the early warning model was constructed and visualized based on the nomogram function in R software. The model performance was evaluated by accuracy, specificity, sensitivity, positive likelihood ratio and negative likelihood ratio. The model was validated by a validation cohort of 4808 patients who met the inclusion/exclusion criteria from January 2020 to June 2020 in the Emergency Chest Pain Center of the hospital. The effect of early diagnosis and early warning model was evaluated by calibration curve.Results:After multivariate analysis, the risk factors for AAD were male sex ( OR=0.241, P<0.001), cutting/tear-like pain ( OR=38.309, P<0.001), hypertension ( OR=1.943, P=0.007), high-risk medical history ( OR=12.773, P<0.001), high-risk signs ( OR=7.383, P=0.007), and the first D-dimer value ( OR=1.165, P<0.001), Protective factors include diabetes( OR=0.329, P=0.027) and coronary heart disease ( OR=0.121, P<0.001). The area under the ROC curve (AUC) of the early diagnosis and warning model constructed by combining the risk factors was 0.939(95 CI:0.909-0.969). Preliminary validation results showed that the AUC of the early diagnosis and warning model was 0.910(95 CI:0.870-0.949). Conclusions:Sex, cutting/tear-like pain, hypertension, high-risk medical history, high-risk signs, and first D-dimer value are independent risk factors for early diagnosis of AAD. The model constructed by these risk factors has a good effect on the early diagnosis and warning of AAD, which is helpful for the early clinical identification of AAD patients.
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Objective:Evaluation of combined inflammatory and coagulation markers for early identification of DIC in septic patients.Methods:This study was a single-center, retrospective, observational study involving 356 patients with sepsis. Sepsis was defined by the diagnostic criteria of Sepsis version 3.0. Definition of DIC was from the International Society on Thrombosis and Hemostasis (ISTH) DIC Score. Inflammatory biomarkers, including tumor necrosis factor (TNF)-α, interleukin (IL)-1β,2R,6,8,10, etc. and biomarkers of coagulation, like platelet (PLT), international normalized ratio (INR), D-dimer, fibrinogen (Fib), etc. were included in this study.Results:Among 356 patients with sepsis, 301 patients did not develop DIC (non-DIC) during hospitalization, 32 patients had DIC on the day of admission (overt-DIC), and 23 patients developed DIC within 1 week of admission (pre-DIC). Compared to non-DIC patients, pre-DIC patients had lower platelet counts and fibrinogen ( P < 0.05), higher levels of INR and D-dimer ( P < 0.05), higher levels of cytokines (TNF-α、IL-1β、IL-2R、IL-8、IL-10) and procalcitonin ( P < 0.05), higher APACHEⅡ and SOFA scores ( P < 0.05). Using receiver operating characteristics (ROC) analysis, we found that some biomarkers of coagulation and inflammation could discriminate pre-DIC from non-DIC patients. The area under the curve (AUC) of INR in the ROC analysis was 0.773 (95% CI: 0.696-0.851), the AUC of IL-2R was 0.700 (95% CI: 0.599-0.798) which is highest among inflammation markers, the highest AUC was obtained from the combination of platelets, INR, Fib, D-dimer and IL-2R (AUC = 0.843; 95% CI: 0.758-0.928). Kaplan-Meier survival curve suggested that high level of IL-2R (> 1064.5 U/mL) was a valuable predictor of 28-day mortality in septic patients. Conclusion:Inflammatory marker, IL-2R, is related to the occurrence of DIC in septic patients and has predictive value for pre-DIC. Combination of coagulation (platelets, INR, Fib, D-dimer) and inflammatory markers (IL-2R) can help to identify pre-DIC state in septic patients.
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Objective:To analyze the clinical features of patients with pyogenic liver abscess (PLA) and the application of mNGS in PLA, thus to provide reference for clinical diagnosis and treatment.Methods:The demographic and clinical data of 549 patients with liver abscess admitted to Zhongshan Hospital Affiliated to Fudan University from December 2015 to June 2020 were analyzed retrospectively. According to the detection of Klebsiella pneumoniae in 246 patients with positive etiological test results, the patients were divided into two groups: KPLA group and nKPLA group, and clinical characteristics of the two groups were compared. At the same time, the application value of mNGS in PLA was analyzed.Results:Among the 549 patients, the main clinical symptom of PLA was fever ( n= 503, 91.6%) and other clinical symptoms included chills and abdominal pain. Most patients had a single abscess ( n= 464, 84.5%) located in the right lobe ( n = 368, 67.0%), with a size between 5 and 10 cm ( n= 341, 62.1%). A total of 246 patients had positive etiological test results, including 202 KPLA patients which was the main pathogen of liver abscess. The prevalence of diabetes and fatty liver was higher in KPLA patients ( P < 0.05), but there were more culture of liver positive factors in nKPLA patients ( P < 0.001). Among the 109 patients with traditional microbiological results, 92 patients were suspected to KPLA (Klebsiella pneumoniae), of which 14 patients (15.2%) were multidrug resistant (MDR) infection; 17 patients were suspected to nKPLA, of which 10 patients (58.8%) were MDR infection; the incidence of MDR infection in patients with nKPLA was significantly higher than that in patients with KPLA ( P < 0.05). The positive rate of mNGS in plasma was 85.2%, the positive rate of traditional microbial culture in plasma was 14.8%, the positive rate of mNGS in pus was 96.2% and traditional microbial culture in pus was 65.4%. The positive rate of traditional culture was significantly lower than that of mNGS ( P < 0.05). Conclusions:PLA is usually manifested as fever, single and at the right lobe of the liver. Klebsiella pneumoniae is the most common pathogenic bacteria of PLA, which is more common in patients with diabetes and fatty liver, while non-Klebsiella pneumoniae is relatively more common in patients with culture of liver positive factors. The positive detection rate of mNGS is high, which has a unique advantage in pathogen detection.
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Objective:To explore the basic biological characteristics of lncRNA B230352I09 and its role in the process of myocardial injury.Methods:We analyzed the biological characteristics of lncRNA B230352I09 on the UCSC website and predicted the possible binding protein of lncRNA B230352I09 by the catRAPID. Real-time fluorescence quantitative (RT) PCR method was applied to detect the expression of lncRNA B230352I09 in heart tissues at different time points (0, 1, 3, 7d) within 7 days after birth, the organs distribution and expression of lncRNA B230352I09 in neonatal mouse and the expression pattern of lncRNA B230352I09 in the heart of mice with myocardial injury. In addition, we constructed hypoxia model by culturing primary cardiomyocytes to detect the effect of lncRNA 230352I09 overexpression on hypoxic cardiomyocyte apoptosis by Hoechst staining kit, the effect of lncRNA B230352I09 overexpression on ROS content of hypoxic cardiomyocyte by DCFDA probe and changes in mitochondrial membrane potential of hypoxic cardiomyocytes by JC-1 Fluorescent probes.Results:Full-length of mouse B230352I09 was 663bp, located in the chr7:123031415-123066439 forward strand. RBBP6 gene was adjacent to B230352I09, which may be the target of lncRNA B230352I09 by catrapid prediction analysis. With the development of the heart, the expression level of lncRNA B230352I09 showed a gradual downward trend. The main expression organs of lncRNA B230352I09 in 1-day-old mice were heart, brain, kidney and liver. In heart tissue, lncRNA B230352I09 expression in non-cardiomyocytes was significantly less than in cardiomyocytes [ (1.0± 0.03) vs. (9.2± 3.29), P=0.013]. After myocardial injury, the expression level of lncRNA B230352I09 showed an increasing trend compared with the normal developing mice, but there was no statistical significance. Hoechst staining showed that lncRNA B230352I09 could inhibit the apoptosis of hypoxic cardiomyocytes. Detecting the content of ROS in cardiomyocytes showed that compared with the hypoxia group, the generation of ROS was significantly reduced in the lncRNA B230352I09 overexpression group ([(3.8±0.71) vs. (1.65±0.56), P=0.015]). JC-1 fluorescent probe was used to detect the mitochondrial membrane potential, and the results showed that the mitochondrial membrane potential of cardiomyocytes in the lncRNA B230352I09 overexpression group was significantly higher than that in the hypoxia group. Conclusions:In heart tissue, lncRNA B230352I09 was mainly expressed in cardiomyocytes. LncRNA B230352I09 has a protective effect in the process of myocardial injury in mice, mainly by inhibiting apoptosis of cardiomyocytes, reducing ROS production, and protecting mitochondrial membrane potential of cardiomyocytes.
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Objective:To explore the value of metagenomic next-generation sequencing (mNGS) in the pathogen diagnosis of liver abscess.Methods:A perspective study was performed in 35 hospitalized patients with liver abscess in Department of Emergency Medicine, Zhongshan Hospital, Fudan University from February 2020 to April 2021. Blood samples and abscess drainage fluid samples were detected by routine microbial culture and mNGS. Patients were divided into two groups according to whether they had septic shock or not. SPSS 25.0 was used for statistical analysis.Results:The overall positive rate of mNGS in blood samples and drainage fluid samples was significantly higher than that of routine microbial culture methods (blood: 67.6% vs. 15.2%, P<0.05; Drainage fluid: 100% vs. 55.2%, P<0.05). In 35 patients with liver abscess, 71.4% of the pathogens were Klebsiella pneumoniae. The sequence number of pathogenic pathogens detected by mNGS in abscess drainage fluid samples of patients in the shock group was significantly higher than that in the non-shock group ( P<0.05). Conclusions:The mNGS can quickly and accurately detect the pathogen of liver abscess, which can provide important etiological diagnostic for clinical treatment.
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Objective:To compare the predictive value of the HEART, TIMI and GRACE scores for major adversecardiovascular events (MACEs) at 7 and 28 days in patients with actue non-ST-segment elevation myocardial infarction (NSTEMI).Methods:More than 12 000 patients with chest pain from the Emergency Department of Zhongshan Hospital Affiliated to Fudan University from October 2017 to October 2018 were studied, including 566 patients with cardiogenic chest pain, 105 patients with ST-segment elevation myocardial infarction (STEMI) excluded and 15 patients lost to follow-up. Finally, 109 patients with NSTEMI and 337 non-myocardial patients with cardiogenic chest pain were enrolled. NSTEMI patients were divided into subgroups according to whether MACEs occurred. LSD t-test, Mann-Whitney U test or χ2 test were used to analyze and compare the differences between the two subgroups about the baseline data, clinical data, HEART, TIMI and GRACE scores at the time of visit. Multivariate logistic regression analysis was used to explore the independent factors of MACEs at 7 and 28 days. And the predictive values of different scores for 7-day MACEs and 28-day MACEs were compared in NSTEMI patients through the receiver operating characteristic (ROC) curve. Results:Compared NSTEMI patients with non-myocardial patients with cardiogenic chest pain, we found a statistically significant differences in sex, past history of coronary heart disease,≥3 risk factors for atherosclerosis, electrocardiogram, high-sensitivity troponin T (hs-cTnT), creatinine value, past history of myocardial infarction, HEART score, TIMI score and GRACE score. In further subgroup analysis of NSTEMI patients who were divided according to whether MACEs occurred, we found previous history of stroke and increased hs-cTnT were statistically different in 7 days after the onset of the disease. The multivariate analysis showed that the previous history of stroke and increased hs-cTnT were independent factors for the occurrence of MACEs at 7 days after the onset of NSTEMI; The previous history of stroke and increased hs-cTnT, electrocardiogram ST segment depression and TIMI score were statistically different at 28 days after the onset of NSTEMI. The multivariate analysis showed that the previous history of stroke and TIMI score were independent factors for the occurrence of MACEs at 28 days after the onset of NSTEMI patients. ROC curve indicated that the predictive value of TIMI score (AUC=0.715, 95% CI: 0.482-0.948) was better than HEART (AUC=0.659, 95% CI: 0.414-0.904) and GRACE scores (AUC=0.587, 95% CI: 0.341-0.833)in predicting MACEs in NSTEMI patients. Conclusions:HEART score, TIMI score and GRACE score can be used to evaluate NSTEMI patients. There is an independent predictive value on TIMI score for the occurrence of 28-day MACEs in NSTEMI patients.
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Objective:Dysregulated host immune responses contribute to the pathogenesis of sepsis. G protein-coupled receptor 174 (GPR174) was found to be involved in the immune responses and associated with the susceptibility to autoimmune diseases. This study aimed to investigate the association of GPR174 variants with sepsis susceptibility and the contribution of GPR174 in sepsis development.Methods:From May 2005 to December 2017, a total of 575 sepsis patients and 579 non-septic controls admitted to our Emergency ICU were enrolled in this case-control study. The non-synonymous SNP rs3827440 in GPR174 was genotyped using TaqMan Real-time PCR assays on ABI7900 platform. Then the correlation between rs3827440 and serum levels of interleukin (IL)-6 and tumor necrosis factor-alpha (TNF-α) were investigated in septic patients. Gpr174-deficient mice were generated and subjected to cecal ligation and puncture (CLP). The concentrations of inflammatory cytokines were measured by enzyme-linked immunosorbent assay (ELISA).Results:Rs3827440 TT/T genotype in GPR174 was positively associated with sepsis risk after logistic regression analysis adjusted for sex [odds ratio ( OR) = 1.68, 95% confidence interval ( CI): 1.19-2.20, P = 0.0004]. IL-6 and TNF-α serum levels in female TT and male T allele carriers of septic patients were significantly higher than those in female CC and male C allele carriers ( P < 0.05). Preclinical validation of Gpr174 gene was performed in Gpr174 knockout (KO) mice using CLP models. Gpr174 KO mice had higher survival rate. Moreover, Gpr174 KO mice had significantly decreased serum concentrations of IL-1β, IL-6 and TNF-α compared with WT mice, while the levels of IL-10 was increased ( P < 0.01). Conclusions:GPR174 as a novel sepsis susceptibility gene in Chinese Han population is involved in the development and physiopathology of sepsis.
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Objective To explore the application effect of triage-registration information systems in emergency patients. Methods A total of 18 964 emergency patients from 1 December 2016 to 31 December 2016 in Zhongshan Hospital of Fudan University Emergency Department were selected as control group and 18798 emergency patients as experimental group from March 1, 2017 to March 31, 2017. In the control group, the patients were used traditional mode of triage-registration and registration office respectively line. In the experimental group, the patients were used triage-registration information systems in line once. The emergency waiting time, patient satisfaction and medical staff satisfaction were compared between the two groups before and after the application of triage-registration information systems. Results The waiting time in the experimental group was significantly shorter than that in the control group, median(P25, P75):11(6-28)min vs. 10(4, 27)min, The difference between both groups was statistically significant(Z=-14.5433, P=0.000). The patient satisfaction in the experimental group were better than those in the control group, (2.89 ± 0.41 vs. 2.98 ± 0.13), and with statistical difference (Z=-10.317, P＜0.05). And the acceptance of the medical staff in the experimental group were better than those in the control group, (2.90±0.35 VS 2.97±0.16), and with statistical difference (Z=-5.527, P<0.05). Conclusions The development and application of the triage- registration information system can effectively shorten the waiting time of patients, improve the experience of emergency patients, improve the satisfaction of medical staff, and realize the optimization of the process of seeking medical treatment.
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Objective To measure the reads numbers of Human Herpes Virus in blood sample from patients with sepsis by using Next Generation sequencing (NGS) and explore the relationship between read number of virus and the severity, prognosis, immune status of septic patients.Methods Blood sample and clinical information from 150 patients with sepsis were enrolled in this study. All patients' blood samples were sent to perform NGS pathogenic test. According to the results of NGS, septic patients were divided into HHV-detected group and HHV-undetected group. Besides, patients were scored with Sequential Organ Failure Assessment (SOFA) and Acute Physiology and Chronic Health Evaluation Ⅱ(APACHE Ⅱ ) on the day of blood collection. The counts of total leukocytes, lymphocytes and the levels of cytokines were also measured. Results 51.3 percent of septic patients were detected with HHV nucleic acid. The APACHE Ⅱ and SOFA scores were significantly higher in HHV-detected patients compared with patients in HHV-undetected group. Besides, patients who had a higher SOFA score might lead to a higher detection rate of HHV. Moreover, the 28-day and 90-day mortality rates were higher in detected group (P< 0.01). The detection of HHV nucleic acid was positively correlated with a high 90-day mortality rate (P= 0.0056). One-way analysis of variance revealed that the counts of total lymphocyte and different types of lymphocyte (CD19+B、CD4+T、CD8+T、CD56+ lymphocyte) were significantly less in detected group than that in undetected group. Furthermore, both the levels of pro-inflammatory cytokines (TNF-α、IL-2R、IL-6、IL-8) and anti-inflammatory cytokines (IL-10) in detected group were significantly higher than those in undetected group. Gender, age, APACHE Ⅱ , SOFA, IL-2R, IL-10, CD19+B lymphocyte and T cells, were still significant even after multivariate logistic analyses. Conclusions The detection rate of HHV nucleic acid in patients with sepsis was high. The detection of HHV was a high-risk factor of death in patients with sepsis. The cut-off value which is more than 100 had a significant clinical value. The infection of HHV could be conducted by dysfunction of immunity.
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Objective@#To explore the application effect of triage-registration information systems in emergency patients.@*Methods@#A total of 18 964 emergency patients from 1 December 2016 to 31 December 2016 in Zhongshan Hospital of Fudan University Emergency Department were selected as control group and 18798 emergency patients as experimental group from March 1, 2017 to March 31, 2017. In the control group, the patients were used traditional mode of triage-registration and registration office respectively line. In the experimental group, the patients were used triage-registration information systems in line once. The emergency waiting time, patient satisfaction and medical staff satisfaction were compared between the two groups before and after the application of triage-registration information systems.@*Results@#The waiting time in the experimental group was significantly shorter than that in the control group, median (P25, P75) : 11 (6-28) min vs. 10 (4, 27) min, The difference between both groups was statistically significant (Z=-14.5433, P=0.000) . The patient satisfaction in the experimental group were better than those in the control group, (2.89±0.41 vs. 2.98±0.13), and with statistical difference (Z=-10.317, P<0.05) . And the acceptance of the medical staff in the experimental group were better than those in the control group, (2.90±0.35 VS 2.97±0.16), and with statistical difference (Z=-5.527, P < 0.05).@*Conclusions@#The development and application of the triage-registration information system can effectively shorten the waiting time of patients, improve the experience of emergency patients, improve the satisfaction of medical staff, and realize the optimization of the process of seeking medical treatment.
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Objective To investigate the genetic variants in the protein C (PC) and endothelial protein C receptor (EPCR) genes associated with the risk and outcome of acute respiratory distress syndrome (ARDS) patients in Chinese Han race.Methods Five tagSNPs (single nucleotide polymorphism,SNP) in the PC and EPCR genes were genotyped in patients with ARDS (n =275) and non-ARDS (n =337) in order to find the association between them in this case-control study.The SNPs were genotyped by SNPstream Beckman platform.Then,the correlation between the associated SNPs and plasma levels of activated protein C (APC) in patients with ARDS was investigated.The APC levels were measured using enzyme linked immunosorbent assay (ELISA) method.Results Association analysis rcvealed that two PC SNPs in perfect linkage disequilibrium,rs1799809 and rs1158867,were significantly associated with susceptibility to ARDS.T allele frequency of rs1799809 in ARDS patients was significantly higher than that in non-ARDS patients (OR =1.569,95％ CI:1.192-2.066).And the genotype frequencies of rs1799809 were also significantly different between these two groups (P =0.007).The association remained significant after adjustment for multiple comparisons.Haplotype consisting of three SNPs in the PC gene was also associated with susceptibility to ARDS.The frequency of haplotype CCC in the ARDS samples was significantly lower than that in the non-ARDS group (P ＜ 0.01).Moreover,ARDS patients canrying rs1799809 TT genotype showed lower serum levels of APC than patients with TC and CC genotypes (Padj =0.02).However,genotype and allele analyses of EPCR did not show any significant difference between ARDS and non-ARDS patients.Conclusions These findings indicated that common genetic variation in the PC gene was significantly associated with susceptibility to ARDS in Chinese Han race.The PC genetic variation influenced plasma concentration of APC in patients with ARDS.
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Objective@#To investigate the value of bedside echocardiography in diagnosis and risk assessment of in-hospital death of patients with Stanford type A aortic dissection.@*Methods@#The clinical data of 229 patients with Stanford type A aortic dissection diagnosed by CT angiography in Zhongshan Hospital affiliated to Fudan University between January 2009 and January 2016 were retrospectively analyzed. The patients were divided into survival group(191 cases)and non-survival group(38 cases)according to presence or absence of in-hospital death. The bedside echocardiography features were analyzed, and influence factors of in-hospital death were determined by multivariate logistic regression analysis.@*Results@#(1) Compared with the survival group, the non-survival group had lower surgery rate (60.52%(23/38) vs. 85.34%(163/191), P<0.01). Age, gender and Debakey classification were similar between survival group and death group (all P>0.05). (2) The bedside echocardiography results showed that prevalence of aortic valve involvement(65.79%(25/38) vs.34.03%(65/191), P<0.01) and severe aortic regurgitation (44.74%(17/38) vs. 14.14%(27/191), P<0.01) were significantly higher in non-survival group than in survival group. The non-survival group had larger aortic root diameter than the survival group ((55.5±6.4)mm vs. (42.3±7.8)mm, P<0.01). There were no significant differences in pericardial effusion, expansion of aortic sinus, and left ventricular ejection fraction between survival group and non-survival group (all P>0.05). (3) The multivariate logistic regression analysis showed that aortic valve involvement(OR=3.275, 95%CI 1.290-8.313, P<0.05), aortic root diameter(OR=1.202, 95%CI 1.134-1.275, P<0.01), and surgery (OR=0.224, 95%CI 0.079-0.629, P<0.01) were independent risk factors for in-hospital death in patients with Stanford type A aortic dissection.@*Conclusions@#Bedside echocardiography has significant diagnostic value for Stanford type A aortic dissection. Aortic valve involvement, enlargement of aortic root diameter and without surgery are independent risk factors for patients with Stanford type A aortic dissection.
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Objective@#To explore the imaging manifestations of multi-slice spiral CT angiography (CTA) and relationship with in-hospital death in patients with aortic dissection (AD).@*Methods@#The clinical data of 429 patients with AD who underwent CTA in Zhongshan Hospital of Fudan University between January 2009 and January 2016 were retrospectively analyzed. AD patients were divided into 2 groups, including operation group who underwent surgery or interventional therapy (370 cases) and non-operation group who underwent medical conservative treatment(59 cases). The multi-slice spiral CTA imaging features of AD were analyzed, and multivariate logistic regression analysis was used to investigate the relationship between imaging manifestations and in-hospital death in AD patients.@*Results@#There were 12 cases (3.24%) of in-hospital death in operation group, and 28 cases (47.46%) of in-hospital death in non-operation group(P<0.001). AD involved different vascular branches. Multi-slice spiral CTA can clearly show the dissection of true and false lumen, and intimal tear was detected in 363 (84.62%) cases, outer wall calcification was revealed in 63 (14.69%) cases, and thrombus formation was present in 227 (52.91%) cases. The multivariate logistic regression analysis showed that the number of branch vessels involved (OR=1.374, 95%CI 1.081-1.745, P=0.009) and tearing false lumen range(OR=2.059, 95%CI 1.252-3.385, P=0.004) were independent risk factors of in-hospital death in AD patients, and the number of branch vessels involved (OR=1.600, 95%CI 1.062-2.411, P=0.025) was independent risk factor of in-hospital death in the operation group, while the tearing false lumen range (OR=2.315, 95%CI 1.019-5.262, P=0.045) was independent risk factor of in-hospital death of non-operation group.@*Conclusions@#Multi-slice spiral CTA can clearly show the entire AD, true and false lumen, intimal tear, wall calcification and thrombosis of AD patients. The number of branch vessels involved and tearing false lumen range are the independent risk factors of in-hospital death in AD patients.
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Objective To investigate the possible association of IRAK4 polymorphisms with susceptibility to and prognosis of severe sepsis.Methods A total of 192 patients hospitalized in emergency department of Zhongshan Hospital from February 2006 to December 2009,and another 192 healthy volunteers were enrolled in this case-control study.Patients were excluded if they had metastatic tumors,autoimmune diseases,AIDS or received immunosuppressive drugs.This study was approved by the ethical committee of Zhongshan Hospital,Fudan University.Sepsis patients were divided into survival group(n =124)and non-survival group(n =68)according to the 30-day mortality.Primer 3 software was used to design the PCR and sequencing primers.Genomic DNA was extracted from peripheral blood mononuclear cells.Seven tagSNPs were selected based on the data of Chinese Han in Beijing from the Hapmap projectand genotyped by direct sequencing.We used x2 analysis to evaluate the significance of differences in genotype and allele frequencies between different groups.Results The distributions of all tagSNPs were consistent with Hardy-Weinberg equilibrium.The allele and genotype frequencies of rs4251545(G/A)were significantly different between severe sepsis and healthy control groups(P =0.015,P =0.035,respectively).Carriers of the rs4251545A had a higher risk for severe sepsis compared with carriers of the rs4251545G(OR =1.69,95％ CI:1.10-2.58).The allele and genotype frequencies of all SNPs were not significantly different between survivor group and non-survivor group.Conclusions These findings indicated that the variants in IRAK4 are significantly associated with severe sepsis susceptibility in the Chinese Han population.
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Objective To assess the risk factors of the in-hospital mortality of acute type A aortic dissection after operation. Method From January 2003 to June 2008,185 patients, 144 males and 41 females, with acute type A aortic dissection operated on were enrolled. The average age of patients was (49.46 ± 11.04 ) years old.The patients' demographics, history, clinical features, and some laboratory examinations were reviewed. Univariate and multivariate analysis followed by logistic regression analysis were carried out to identify the predictors of inhospital mortality. Results The in-hospital mortality rate was 9.1%. The results of univariate and multivariate analyses as follows: pre-operation positive neurological symptom (Univariate OR = 5.084,95%CI:1.792 -14.426, P = 0.002; Multivariate OR = 5.538,95%CI: 1.834 - 16.721, P = 0.002, respectively), hypotension (Univariate OR = 6.986,95%CI:1.510- 32.323,P =0.013; multivariate OR = 1.998,95%CI:0.315-12.679,P = 0.463, respectively) and renal failure (Univariate OR = 3.594,95%CI:1.237 - 10.438,P =0.019; Multivariate OR = 3.254,95%CI:1.034- 10.242, P= 0.044, respectively). Conclusions There are two predictors, pre-operation positive neurological symptom and renal failure, of pre-hospital mortality found in current analyses. Our results may improve the regimen made by cardiac surgeons and emergency doctors so as to help patients and their relatives to make correct decision.
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Objective To investigate the changes of circulaling progenitor cells and endothelial progenitor cells(EPCs)in non-septic and septic shock patients using flow cytometry.Method A total of 27 sepsis patients hospitalized in emergency department of Zhongshan hospital during August 2007 to February 2008 were enrolled in this study.The patients were dividedinto septic shock group(n=12)and non-septic shock group(n=15).Ten healthy individuals and ten non-sepsis ICU patients were collected as controls.Peripheral blood mononuclear cells(PBMCs) were isolated by Ficoll density gradient centrifugation,and EPCs labelled with antibodies against CDl33,CD34 and VEGFR-2 were identified and isolated by three-color fluorescence flow cytometry.Differences within the groups were analyzed using One way ANOVA.Results The percentages ofprogenitor cells and EPCs in the PBMC fraction in healthy controls were(0.25%4-0.14%),(0.09%-I-0.02%),respectively,and those in ICU controls were(O.38%.4-0.29%),(0.12%.4-0.02%).The percentages of progenitor cells and EPCs were significantly higher in栅sel如c shock patients(0.57%±0.12%),(0.22%.4-0.10%)than in heathy and non-sepsis ICU controls(P<0.05).However.the percentages of progenitor cells and EPC8 in septic shock pa.tienta(O.20%±0.12%,0.04%-t-O.01%)was obviousely lower than those in healthy,ICU controls and ilionseptic shock patients(P<0.05).Sptic shock survivors had significantly higher numbers of cEPCs than nonsur.vivors(P<0.05).Conclusions The level of progenitor cells and EPC8 in peipheral blood of sepsis patients might be the valuable markers to as.se88 the severity and outcome ofthese ptienS.
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Objective To investigate the possible association of TLR4 polymorphisms with susceptibility and prognosis of SCAP.Method A total of 360 CAP patients hospitalized in emergency department of Zhongshan hospital from May 2005 to April 2008 were enrolled in this case-control study.Patients were excluded if they had metastatic tumors,autoimmune diseases,AIDS or received immunosuppressive drugs.This study was approved by the ethical committee of Zhongshan hospital,Fudan University.Patients were divided into SCAP group(n = 180)and NSCAP group(n = 180)according to the illness severity,and were divided into survival group(n = 300)and death group(n = 60)according to the 30-day mortality.Hapmap database of Han Chinese population was used to select the Tag SNPs.Primer 3 software was used to design the PCR and sequencing primers.Genomic DNA was extracted from peripheral blood mononuclear cells.Genotyping was performed by sequencing the PCR products.We used X2 analysis to evaluate the significance of differences in genotype and allele frequencies between different groups.Results The distributions of three TagSNPs(rs2149356,rs11536879,rs1927907)were consistent with Hardy-Weinberg equilibrium.The allele and genotype frequencies of three TagSNPs in the SCAP group did not differ from the NSCAP group.Also,no significant difference was found between survivor group and non-survivor group.The haplotype frequencies of CA,TA and TG were not significantly different between SCAP group and NSCAP group.And no significant difference of haplotype frequency was existed between survivor group and nonsurvivor group.Conclusions This study suggested that TLR4 gene polymorphisms were not significantly associated with the susceptibility and prognosis of SCAP.
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Objective To investigate the early diagnostic value of plasma D-dimer level in acute aortic dissection (AAD) . Method A total of 80 patients with chest pain were enrolled from January 2006 to March 2009, and 40 patients of them were confirmed to be AAD with computerized tomographic angiography (CTA), and these patients were matched with 40 controls presenting suspected dissection, which were ruled out later. The D-dimer test was performed in all patients within 12 hours after onset of chest pain,and plasma D-dimer concentrations were compared between two groups. Sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) of D-dimer used for diagnosing AAD were analyzed. The receiver operating characteristic (ROC) curve was also established. The statistical analysis of data was carried out by using Mann-Whitney test with SPSS 11.5 software. Results The plasma D-dimer oncentrations in AAD were significantly higher than those in controls [(5.48±7.95) vs. (0.64±0.75), P <0.0l]. Receiver operating characteristic curve analysis showed that D-dimer ( > 0.5 μg/mL) was predictive in the diagnosis of AAD, and the area under ROC curve was 0.848 ± 0.042, (95% CI: 0.766-0.930) with 87.5% sensitivity, 62.5% specificity,70% PPV and 83.3% NPV. Conclu-sions D-dimer may be a valuable biomarker in early diagnosis of AAD.
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Objective To investigate the characteristics of inanune status change in sepsis and severe sepsis patients by quantitative analysing the serum concertrations of pro-and anti-inflammatory cytokines. Method Serum of 38 sepsis patients, 32 severe sepsis patients were collected and 15 health individuals were as controls.ELJSA method was used to quantify the serum levels of inflammatory cytokines. The severity of patient's condition was assessed according to the APACHE Ⅱ system, Retolts The serum concentrations of inflammatory cytokines were different among sepsis and severe sepsis patients. In the serum of sepsis patients the pro-inflammatory eytokine were dominant. But in the serum of severe sepsis patients the anti-inflammatory cytokine were dominant.The serum levels of TNF-α, IL-6, IL-1, IL-10 were obviously different among control, sepsis and severe sepsis groups ( P<0.05). The serum levels of IL-1 and IL-10 were significantly correlated with APACHE II scores. The multiple linear regression eqution was APACHE Ⅱ=- 9.393 + (IL-10 x 0.550) + (IL-1 x 0.305) (F =26.198,P<0.001) Conclusions The serum levels of pro-and anti-inflammatory cytokines were significantly different among patients with different stages of sepsis, and the immune status were different. The activation of inflatrmmtory reaction were constant in sepsis patients, while the expression of anti-inflammatory cytokines increased in severe sepsis patients.