Objective:To explore the diagnostic value and correlation of serum tumor markers combined detection of pancreatic cancer. Methods:Selected January 2013 to may 2016 in our hospital in patients with pancreatic cancer in 146 cases,128 cases of non pancreatic cancer with patients and 124 cases of healthy physical examination. Radiation immunity analyzer test groups of serum CA19-9,CA242,CA50,CA125,CEA and TSGF levels and compared between groups. To draw the working characteristic curve(ROC) to analyze the diagnostic value of tumor markers in patients with pancreatic cancer and the correlation of linear correlation analysis of tumor markers. Analysis of independent risk factors for pancreatic cancer using multiple logistic regression models. Results: The pancreatic cancer group of serum CA19-9,CA242,CA50,CA125,CEA and TSGF levels were significantly higher than the control group and non pancreatic cancer group,the differences were statistically significant(P<0. 05 or P<0. 01).Ⅳstage andⅢstage with patients of serum CA19-9,CA242,CA50,CA125 and TSGF levels were significantly higher than Ⅰstage and Ⅱstage with patients(P<0. 01).Ⅳ stage with patients of serum CA19-9, CA242, CA125 and CEA levels were significantly higher than Ⅲ stage with patients ( P<0. 01). The pancreatic cancer group of serum CA19-9,CA242,CA50,CA125,CEA and TSGF of positive rate were significantly higher than that of control group and non pancreatic cancer group(P<0. 01). ROC curves showed that the AUC of serum CA19-9 were higher than other single indexes,the best critical value,sensitivity and specificity were 114. 5 U/ml,81. 2% and 79. 3% respectively. The diagnostic efficacy of the six joint detection were better than the single detection,the sensitivity and specificity were 92. 4% and 76. 5%respectively. Correlation analysis showed that serum CA19-9 were positively correlated with CA242,CA50 and CA125(r=0. 703,P=0. 005;r=0. 572,P=0. 024;r=0. 439,P=0. 036). Multiple logistic regression analysis showed that smoking,incorrect diet,history of diabetes,gallbladder disease history and high levels of CA19-9,CA242,CEA into the regression model,the OR value and 95%CI were 1. 717(0. 736 to 2. 359),2. 865(2. 217 to 3. 685),2. 614(2. 186 to 3. 127),3. 527(2. 842 to 4. 377),4. 214(3. 570 to 4. 962), 2. 315(2. 114 to 2. 539),1. 876(1. 175 to 2. 852). Conclusion: Serum tumor markers combined detection can help to improve the accuracy of early diagnosis of pancreatic cancer and smoking,incorrect diet habits,history of diabetes,biliary disease history and high levels of CA19-9,CA242 and CEA are independent risk factors for pancreatic cancer.

BACKGROUND:Pneumonectomy, extracorporeal circulation, lung transplantation and pulmonary embolism can cause ischemia/reperfusion injury of lung tissue. Lung ischemia/reperfusion injury is an important factor of lung function disorders after lung transplantation. OBJECTIVE:To analyze the effect of ischemic postconditioning on rat models of lung ischemia/reperfusion injury. METHODS:Twenty-four male SD rats were randomly divided into sham, ischemia/reperfusion and ischemic postconditioning groups (n = 8 rats/group) to establish the lung ischemia/reperfusion injury model. The rats in the sham group were only subjected to separation of the hilum of left lung and pulmonary arteries and veins, without blocking. The rats in the ischemia/reperfusion group were subjected to another 2 hours of reperfusion after 1 hour of lung ischemia. The rats in the ischemic postconditioning group were first subjected to 30 seconds of lung ischemia and 30 seconds of reperfusion for three times, and then to 2 hours of reperfusion. After the experiment, the specimens of lung tissue were obtained to detect the wet/dry weight ratio of lung tissue, activities of superoxide dismutase, malondialdehyde and myeloperoxidase, the contentsof inflammatory cytokines tumor necrosis factor α, interleukin-1β and interleukin-6, and the histopathological changes of lung tissue were observed. RESULTS AND CONCLUSION:Compared with the sham group, the wet/dry weight ratio of lung tissue, activities of myeloperoxidase and myeloperoxidase, the levels of tumor necrosis factor α, interleukin-1β and interleukin-6 were significantly increased (P < 0.05) in the ischemia/reperfusion and ischemic postconditioning groups, however, the increase levels of these indices were not significant in the ischemic postconditioning group, and the contents and activities in the ischemic postconditioning group were al significantly decreased (P < 0.05) compared with those in the ischemia/reperfusion group. In the ischemia/reperfusion and ischemic postconditioning groups, the activity of superoxide dismutase was obviously lower than that in the sham group, however, the activity of superoxide dismutase in the ischemic postconditioning group was obviously higher than that in the ischemia/reperfusion group. Pathological examination showed that thickened alveolar wal, edema and a large amont of inflammatory cel infiltrations were observed in the lung tissue of rats in the ischemia/reperfusion group. The degrees of alveolar wal thickening and edema in the lung tissue of rats in the ischemic postconditioning group were mild compared with the ischemia/reperfusion group, and in addition, some inflammatory cels were infiltrated. The histopathological scores of lung tissue in the ischemic postconditioning group were lower than those in the ischemia/reperfusion group. These results suggest that ischemic postconditioning plays its protective role on rat models of ischemia/reperfusion injury by inhibiting inflammatory cel accumulation, oxygen free radical production and pro-inflammatory cytokine release after ischemia/reperfusion injury.

Objective: To investigate the screening results of adolescent scoliosis in Chuzhou City, Anhui Province, and analyze the influencing factors for scoliosis, so as to provide insights into the prevention and control of scoliosis among adolescents. Methods: Students were selected from six primary and middle schools in Chuzhou City using the stratified random cluster sampling method from April to June 2023. Demographic information, daily behaviors and postures, and exercise status were collected through questionnaire surveys. Scoliosis was screened and diagnosed according to the Screening for Abnormal Spinal Curvature in Children and Adolescents. Influencing factors for scoliosis among primary and middle school students were identified using a multivariable logistic regression model. Results: A total of 1 823 questionnaires were allocated, and 1 768 effective questionnaires were recovered, with an effective response rate of 96.98%. There were 537 primary school students, 1 000 junior high school students and 231 senior high school students, with an average age of (13.40±1.92) years. There were 948 male students (53.62%) and 820 female students (46.38%). A total of 131 cases of scoliosis were screened positive, with a positive rate of 7.41%. The results of multivariable logistic regression analysis showed that gender (female, OR=1.759, 95%CI: 1.135-2.727), body mass index (OR=0.593, 95%CI: 0.538-0.654), sleeping position (side lying, OR=0.598, 95%CI: 0.377-0.951; prone lying, OR=2.336, 95%CI: 1.201-4.545), frequency of reading in bed (often, OR=2.099, 95%CI: 1.201-3.670), way of carrying backpack (shoulders, OR=0.580, 95%CI: 0.370-0.908), and exercise level (OR=0.428, 95%CI: 0.296-0.618) were influencing factors of scoliosis among primary and middle school students. Conclusion The positive rate of scoliosis screening among primary and middle school students in Chuzhou City was 7.41%, which was influenced by gender, age, body mass index, sleeping posture, reading in bed, way of carrying backpack and exercise level.

Objective To indentify Streptobacillus moniliformis isolated from the knee joint pus by 16S rRNA gene sequencing and biochemical reactions and explore the clinical value of the method. Methods The bacterial 16S rRNA gene sequence-based identification, bacterial morphology, VITEK 2 automate systems, API 20NE strips, API 20E strips and API 50CH were performed to identify the rare bacteria. Results The bacteria grew slow on blood agar and chocolate agar and were inhibited on Maconkey agar. The bacterial colony on blood agar tookes the form of 1~2 mmomelette, which was translucent and moist with circular protrusion and smooth edges. They were Gram-staining negative and in catenation, its thalli 1~3μm, round, oval or fusiform. Vitek 2 GN-13, API 20NE and API 20E were unable to reach the identification of the bacteria. 16S rRNA gene sequencing showed the bacteria were similar to streptobacillus moniliformis by 100%. Conclusion The rare bacteria isolated from left knee joint are streptobacillus moniliformis. 16S rRNA gene sequences combined with the biochemical reactions is accurate in the identification of these bacteria.

Objective    To make a survival analysis for the stage ⅠA non-small cell lung cancer patients who underwent lobectomy, segmentectomy or wedge resection and to discuss whether the segmentectomy and wedge resection can be used as a conventional operation. Methods    The clinical data of 474 patients diagnosed with ⅠA non-small cell lung cancer from January 2012 to June 2015 in the First Affiliated Hospital of China Medical University were retrospectively anlyzed. There were 192 males and 282 females with a mean age of 60 years. Their sex, age, histological type, tumor size, surgical pattern, smoking, drinking, survival rate, disease-free survival rate, recurrence rate were compared. Results    Disease-free survival rate of patients with wedge resection was significantly lower than that of the patients undergoing lobectomy and segmentectomy (P<0.05). When tumor diameter≤19 mm, the disease-free survival rate of patients with wedge resection was lower than that of patients with lobectomy (P=0.006) and segmentectomy (P=0.065). Disease-free survival rate of patients with tumor diameter of 20-<30 mm was significantly lower than that of patients with tumor diameter≤19 mm (P=0.026). Excluding patients with wedge resection, disease-free survival of the patients with lobectomy and segmentectomy and tumor diameter of 20-<30 mm was significantly lower than that of patients with tumor diameter≤19 mm (P=0.036). Patients with wedge resection had significant higher risk of local recurrence than that of patients undergoing lobectomy (P<0.001) and segmentectomy (P=0.002). Conclusion    StageⅠA non-small cell lung cancer patients undergoing segmentectomy can obtain approximate survival and disease-free survival rate compared with  those with lobectomy, especially in patients with tumor diameter≤19 mm. Pulmonary wedge resection as surgical treatment of lung cancer patients must be selected carefully according to the actual situation and surgical purposes.

To develop a high-yield pyruvate strain, we first engineered a pyruvate-producing Escherichia coli KLPP from wild-type E. coli MG1655 by blocking the pathways for byproduct formation via gene knockout. Then, we built a library of mutant containing 7 197 monoclones by using the pUT Mini-Tn5 transposon vector for random mutagenesis with E. coli KLPP. We developed a high-throughput method for pyruvate detection based on dinitrophenylhydrazine reaction using 96-well microplate reader. After two-round screening we successfully obtained six mutants with increased pyruvate titer using this method, the titer of pyruvate was increased by 38%, 31%, 19%, 28%, 44% and 14%, respectively. The position of transposon insertion was determined by whole genome re-sequencing, and the gene locus possibly influencing pyruvate production was analyzed, which laid the foundation for subsequent strain improvement by metabolic engineering.

Objective: To investigate the number and distribution of dendritic cells (DCs), macrophages and M2 macrophages in renal tissues of patients with IgA nephropathy (IgAN) and their correlation with clinicopathological parameters, and explore its role in the progression of IgAN. Methods: Renal tissue samples from 42 patients aged ≥18 years with IgAN were collected by kidney biopsy in Guangdong Provincial People's Hospital from January 2018 to June 2018. The patients were divided into different groups according to Oxford classification and Lee grade classification criteria. The distribution and number of DCs (CD209), macrophages (CD68) and M2 macrophages (CD68 and CD206) were detected by immunohistochemistry. Spearman correlation test was used to analyze the correlation between the number of DCs and macrophages in renal tissues and clinical pathological parameters. Results: The number of DCs in the glomeruli of the M1, T0 and C1 groups increased significantly compared with the M0, T1 and C0 groups, and the number of DCs in the renal interstitium of the T1 group increased significantly compared with the T0 group (all P<0.05). The number of glomerular macrophages in group C1 was significantly higher than that in group C0. The number of macrophages in S1, T1 and Lee IV-V tubulointerstitial groups was significantly higher than that in S0, T0 and Lee II-III groups (P<0.05). The number of M2 macrophages in the S1, T1 and Lee IV-V groups was significantly higher in the tubulointerstitial group than in the S0, T0 and Lee II-III groups (all P<0.05). The blood urea nitrogen, serum creatinine and 24 h urine protein levels in the T1 and Lee IV-V groups were significantly higher than those in the T0 and Lee II-III groups, and the serum albumin levels in the Lee IV-V group were significantly lower (all P<0.05). Spearman correlation analysis showed that the number of DCs in renal interstitium was positively correlated with the proportion of tubulointerstitial fibrosis. There were a positive correlation between the proportion of glomerular segmental sclerosis and tubulointerstitial fibrosis and renal interstitial macrophages and M2 macrophages. The number of M2 macrophages was positively correlated with serum creatinine and 24 h urine protein (both P<0.05). Conclusions The number of DCs and M2 macrophages in kidneys are positively correlated with the clinicopathological features of IgAN patients, which indicates that they may be associated with disease progression.