Objective To summarize the methods of diagnosing and treating solid-pseudopapillary neoplasm of pancreas SPN so as to provide reference for its early clinical diagnosis.Methods We collected the clinical data of 62 patients with pathologically confirmed diagnosis of SPN treated in the First Affiliated Hospital of Xi'an Jiaotong University between Feb.2004 and Sep.2014.Then we retroactively analyzed and summarized the clinical characteristics,diagnosis and treatment of the disease.Results Among the 62 patients,55 were female and 7 were male;the mean age was (31.58±12.67) years old.The clinical features showed no specificity and the tumor was mostly detected upon physical check-up.The tumor was seen to be located mostly in the body and tail of the pancreas,and the average maximum diameter was (7.81±3.54)cm.We did not find obvious abnormality in routine pre-operative blood test results or liver and kidney functions.The imageological examination indicated tumor occupation in the pancreas.All the patients underwent surgical resection with no complications or death and had a good recovery after operation.Pathological diagnosis after operation was SPN without metastasis in lymph modes.Until the last time we followed up all the patients,we found relapse in two patients (3.2％).Conclusion SPN is a tumor that tends to affect young and middle-aged females.The malignancy grade of SPN is low,and patients with this disease show no specificity in clinical manifestation.The imageological examination is of vital importance in diagnosing SPN and surgical resection is an effective way to treat SPN.

This study was aimed to investigate the effect of baicalin on the proportion of Th22 cells and the concentration of IL-22 bothin vivo andin vitro, in order to explore the immune mechanism of baicalin on inflammatory bowel disease mice model. The 3.5% dextran sodium sulfate (DSS) was used on C57BL/6 mice for the establishment of colitis mice model. Mice were randomly divided into the blank control group, model group, and baicalin group. Flow cytometry and ELISA were used in the detection of the proportion of Th22 cells and concentration of IL-22 in peripheral blood serum, respectively. The spleen lymphocytes of mice were isolated and cultured by baicalin medium (0, 10, 20, 40μM) for 48 h. Flow cytometry was used in the detection of the proportion of Th22 cells. The results showed that baicalin reduced the proportion of Th22 cells and the expression of IL-22 bothin vivo andin vitro experiments. It was concluded that baicalin can inhibit Th22 cell differentiation and expression of IL-22in vitro and DSS-induced colitis mice. It indicated that baicalin had a good treatment potential in Th22 cell-mediated inflammatory diseases.

An electrochemical sensor incorporating a signal enhancement for the determination of lead (Ⅱ) ions (Pb2+) was designed on the basis of the thrombin-binding aptamer (TBA) as a molecular recognition element and ionic liquid supported cerium oxide (CeO2) nanoparticles-carbon nanotubes composite modification. The composite comprises nanoparticles CeO2, multi-wall carbon nanotubes (MWNTs)and hydrophobic room temperature ionic liquid (RTIL) l-ethyl-3-methylimidazolium tetrafluoroborate (EM1MBF4). The electrochemical sensors were fabricated by immersing the CeO2-MWNTs-EMIMBF4 modified glassy carbon electrode (GCE) into the solution of TBA probe. In the presence of Pb2+, the TBA probe could form stable G-quartet structure by the specific binding interactions between Pb2+ and TBA. The TBA-bound Pb2+ can be electrochemically reduced, which provides a readout signal for quantitative detection of Pb2+. The reduction peak current is linearly related to the concentration of Pb2+ from 1.0 × 10 8 M to 1.0 × 10-5 M with a detection limit of 5 × 109 M. This work demonstrates that the CeO2-MWNTs-EMIMBF4 nanocomposite modified GCE provides a promising platform for immobilizing the TBA probe and enhancing the sensitivity of the DNA-based sensors.

Objective: To examine the dose-response association between cardiorespiratory fitness ( CRF ) and the risk of cardiovascular and cerebrovascular diseases. Methods: A joint search was performed in Chinese and English electronic databases, including China National Knowledge Infrastructure ( CNKI ) , Wanfang Data, VIP, CBM, PubMed, Embase and Web of Science, to retrieve publications reporting the correlation between CRF and the risk of cardiovascular and cerebrovascular diseases until May, 2021. The pooled risk was estimated using the random effects model, and the dose-response association was evaluated using restricted cubic splines. The source of heterogeneity was assessed by subgroup analysis, and the stability of the results was tested by the trim-and-fill method, while the publication bias was assessed using funnel plots. Results: Totally 37 280 literatures were identified, and 23 eligible studies were finally included in the analysis, which covered 2 605 622 subjects. There were 22 publications identified as high-quality. Meta-analysis revealed that the pooled risk of cardiovascular and cerebrovascular diseases reduced by 42% in the highest CRF group relative to the lowest CRF group ( OR=0.58, 95%CI: 0.52-0.65 ), and a one metabolic equivalent ( MET ) increase in CRF caused a 10% reduction in the pooled risk of cardiovascular and cerebrovascular diseases ( OR=0.90, 95%CI: 0.88-0.92 ). There was a negative linear correlation between CRF and the incidence of cardiovascular and cerebrovascular diseases ( P=0.396 ). Subgroup analysis identified gender, sample size and study regions as possible sources of heterogeneity, and sensitivity analysis showed that the study results were stable. Conclusions There is a negative linear correlation between CRF and the risk of cardiovascular and cerebrovascular diseases, and an increase in CRF may reduce the risk of cardiovascular and cerebrovascular diseases.

Objective:To analyze the clinical characteristics of acute pancreatitis.Methods:The retrospective case-control study was conducted. The clinical data of 558 patients with acute pancreatitis who were admitted to The First Affiliated Hospital of Xi′an Jiaotong University from June 2015 to June 2023 were collected. There were 352 males and 206 females, aged (46±15)years. Observation indicators: (1) general situations of acute pancreatitis patients; (2) etiology of acute pancreatitis patients; (3) severity of acute pancreatitis patients; (4) chronic diseases in acute pan-creatitis patients; (5) complications in acute pancreatitis patients; (6) subgroup analysis of patients with recurrent acute pancreatitis. Measurement data with normal distribution were represented as Mean± SD, and comparison between groups was conducted using the t test. Measurement data with skewed distribution were represented as M( Q1, Q3), and comparison between groups was conducted using the Wilcoxon rank sum test. Count data were described as absolute numbers, and comparison between groups was conducted using the chi-square test or Fisher exact probability. Comparison of ordinal data was analyzed using the rank sum test. Bonferroni correction was used for pairwise comparison. Results:(1) General situations of acute pancreatitis patients. There were significant differences in gender, age, total duration of hospital stay, smoking, and alcohol consumption between the first episode of acute pancreatitis patients and the recurrent acute pancreatitis patients ( P<0.05). (2) Etiology of acute pancreatitis patients. There were significant differences in gallstones and hyperlipidemia between the first episode of acute pancreatitis patients and the recurrent acute pancreatitis patients ( P<0.05). (3) Severity of acute pancreatitis patients. Of the 443 patients with first episode of acute pancreatitis and 115 patients with recurrent acute pancreatitis, cases with mild acute pancreatitis, cases with moderate-severe acute pancreatitis, cases with severe acute pan-creatitis were 320 and 83, 24 and 9, 99 and 23, showing no significant difference between them ( P>0.05). (4) Chronic diseases in acute pancreatitis patients. There were significant differences in com-plication as hyperlipidemia, fatty liver and diabetes between the first episode of acute pancreatitis patients and the recurrent acute pancreatitis patients ( P<0.05). (5) Complications in acute pancrea-titis patients. There was no significant difference in terms of acute necrotic collection, acute peripan-creatic fluid accumulation, walled-off necrosis, pancreatic pseudocyst, infectious pancreatic necrosis, systemic inflammatory response syndrome, respiratory system complications, circulatory system complications, renal complications, sepsis, abdominal compartment syndrome, or pancreatic ence-phalopathy between the first episode of acute pancreatitis patients and the recurrent acute pancrea-titis patients ( P>0.05). (6) Subgroup analysis of patients with recurrent acute pancreatitis. ① Combination with chronic diseases. Of the 115 patients with recurrent acute pancreatitis, cases with mild acute pancreatitis, cases with moderate-severe acute pancreatitis, cases with severe acute pancreatitis were 83, 9, 23, and there were 25, 8, 11 cases of them with hyperlipidemia, respectively, showing a significant difference among them ( P<0.05). ② Complications. Of the 115 patients with recurrent acute pancreatitis, there were 44 cases with hyperlipidemia and 71 cases without hyper-lipidemia, and there were significant differences in acute peripancreatic fluid accumulation and renal complications between them ( P<0.05). Conclusions:Recurrent acute pancreatitis is more common in males. Compared with first episode of acute pancreatitis, cases with recurrent acute pancreatitis usually have younger age, shorter total duration of hospital stay, higher proportion of smoking and drinking. The etiology of recurrent acute pancreatitis is composed of lower levels of biliary diseases and higher levels of hyperlipidemia. Patients with recurrent acute pancreatitis have higher proportion of comorbidities as hyperlipidemia, fatty liver and diabetes. There was no signifi-cant difference in the incidence of complications between first episode of acute pancreatitis and recurrent acute pancreatitis. Compared with recurrent acute pancreatitis patients without concomi-tant hyperlipidemia, recurrent acute pancreatitis patients with concomitant hyperlipidemia are more prone to acute peripancreatic fluid accumulation and renal complications.

Objective:To develop a single-tube one-step multiplex nested real-time reverse transcription polymerase chain reaction (RT-PCR) assay for the simultaneous detection of 2019-nCoV, influenza A virus, influenza B virus and internal-control with human-derived gene.Methods:This study included 30 positive specimens for 2019-nCoV nucleic acid detection and 336 screening specimens collected from the arrivals at Guangzhou Baiyun Airport between February 2020 and February 2022. Sixty-four positive specimens of other respiratory pathogens were also collected from the arrivals at Guangzhou Baiyun Airport during the three-year period before the occurrence of COVID19 outbreak in 2020, and 7 positive viral strains of respiratory pathogens were provided by collaborative laboratories. In order to establish a set of multiplex nested real-time RT-PCR assay, a group of primers and probe combinations for a multiplex nested real-time RT-PCR was designed and screened according to a selection of nucleotide conserved regions of the ORF and N genes of 2019-nCoV and the M gene of influenza A and B viruses, while nested amplification primers and probe for the internal-control with human-derived gene were introduced. Then the prepared pseudovirus-positive quality control and sample discs were applied to evaluate the sensitivity and specificity. Clinical specimens were performed to validate the applicability of the method.Results:The results show that the established one-step multiplex nested real-time RT-PCR assay can specifically detect 2019-nCoV and influenza A and B viruses, with the limit-of-detection of about 125 copies/ml for 2019-nCoV and about 250 copies/ml for influenza A and B viruses. Totally 101 positive samples of various respiratory pathogens were detected, showing that the detection sensitivities of 2019-nCoV and influenza A and B viruses were 96.67%, 92.86% and 96.15%, respectively, with the specificity of 100%. No false-positive detection was found in the applied detection of more than 300 clinical samples.Conclusions:A one-step multiplex nested real-time RT-PCR assay for 2019-nCoV, influenza A and B viruses and human-derived gene internal-control was developed. The assay has good sensitivity and specificity and can be used for rapid screening of 2019-nCoV and influenza A and B viruses in high-volume samples.

Objective:To understand the epidemiological and clinical characteristics of melioidosis in Haikou City, to rise the people's awareness of melioidosis and to provide basis for prevention and control of the disease.Methods:The clinical data of 254 patients with melioidosis treated in 4 Class A tertiary hospitals in Haikou City from January 2000 to September 2020 were collected, and the epidemiological characteristics, clinical manifestations, infection site, prognosis and drug sensitivity were retrospectively analyzed.Results:Among 254 patients with melioidosis, 226 males (88.98%) and 28 females (11.02%), and the gender ratio was 8.07 ∶ 1.00. Farmers were the main occupation, accounting for 37.80% (96/254). The median age was 53 years old, mainly in 41 - 80 years old, accounting for 83.46% (212/254). Han nationality was the most, accounting for 89.76% (228/254). The onset season was mainly in summer and autumn, and the peak was from August to October (117 cases). Patients were mainly distributed in coastal areas, among which Haikou City (49 cases) was the most, followed by Dongfang City (46 cases), Danzhou City (23 cases) and Wenchang City (21 cases). Totally 196 cases (77.17%) had basic diseases, diabetes was the most common (162 cases). The main symptoms of admission were fever (211 cases), followed by cough (108 cases) and expectoration (88 cases). The infection sites were mainly blood (104 cases, 40.94%), lung (60 cases, 23.62%), liver and spleen (32 cases, 12.60%). Totally 195 patients were treated with sensitive antibiotics, at discharge, 37 cases (18.97%) were cured, 129 cases (66.15%) improved, 18 cases (9.23%) did not heal, 7 cases (3.59%) died and 4 cases (2.05%) were discharged voluntarily. Results of drug sensitivity tests from 2010 to 2020 showed that the sensitivity rates of Burkholderia pseudomallei to imipenem (142 cases), meropenem (16 cases) and ceftazidime (141 cases) were all 100.00%, and the sensitivity rates of doxycycline (25 cases) and compound sulfamethoxazole (142 cases) were 92.00% (23/25) and 99.30% (141/142), respectively. Conclusions:Males, farmers, middle-aged and elderly people and people with diabetes and other basic diseases are the high incidence population of melioidosis in Haikou City. The incidence peak is in summer and autumn. The common clinical manifestations are fever, pulmonary infection, abscess of liver and spleen, etc. In the treatment, Burkholderia pseudomallei is more sensitive to imipenem, meropenem and ceftazidime.

【Objective】 To investigate the effects of resveratrol on gemcitabine chemotherapy in pancreatic cancer and the possible molecular mechanism. 【Methods】 Gemcitabine resistant cell lines were screened by continuous low concentration increasing induction. High-throughput RNA-seq was used to analyze the differential expression enrichment pathway, COMET assay was used to detect DNA damage, Western blotting was used to detect related pathway indicators, and Chou-Talalay was used to calculate drug combination synergistic index. AutoDock predicts docking targets for small molecules and proteins. 【Results】 DNA damage repair related pathways were activated in drug-resistant cell lines compared with their parents. Resveratrol enhanced the DNA damage effects induced by gemcitabine (P<0.01). Resveratrol inhibited the expression of PARP1, a key molecule of DNA damage repair, and played a synergic effect with gemcitabine (CI<1). Resveratrol has docking targets with the CAT domain of PARP1. 【Conclusion】 Resveratrol can inhibit PARP1, a key molecule of chemotherapy resistance, and has a synergistic effect with gemcitabine in pancreatic cancer chemotherapy.

Background The altered expressions of hippocampal N-methyl-D-aspartate (NMDA) receptors induced by benzo[ɑ]pyrene (BaP) causes short-term spatial learning and memory impairment in humans and animals, but whether BaP causes alterations of NMDA receptor subunits in other brain regions and the associated neurotoxic mechanism is still essentially unknown. Objective To observe the mRNA expressions of NR1, NR2A, and NR2B of NMDA receptor subunits in different brain regions in SD rat model with subchronic exposure to BaP, and to provide a basis for in-depth study of the mechanism of BaP-induced neurotoxicity. Methods Forty male SD rats were selected and randomly divided into a control group and 1.00, 2.50, and 6.25 mg·kg⁻¹ BaP exposure groups with 10 rats in each group. The exposure rats received intraperitoneal injection of BaP every other day for 90 d.The average latency to platform, the average total distance, and the duration spent in previous quadrant were measured by the Morris Water Maze. Real-time fluorescence quantitative PCR was used to detect the mRNA expressions of NR1, NR2A, and NR2B in hippocampus, cortex, cerebellum, and striatum of rats. Results The average latency to platform and the average total distance in the 2.50 and 6.25 mg·kg⁻¹ BaP groups were significantly prolonged compared with the control group (P<0.05), and the duration that rats spent in previous quadrant in the 6.25 mg·kg⁻¹ BaP group was significantly shortened (P<0.05). Compared with the control group, the mRNA expressions of NR1 and NR2B in the hippocampus in the 2.50 and 6.25 mg·kg⁻¹ BaP groups were significantly reduced (P<0.05), and the NR2A mRNA expression in the hippocampus in the 6.25 mg·kg⁻¹ BaP group was significantly reduced (P<0.05); the mRNA expressions of NR1 and NR2B in the cortical tissue in the 6.25 mg·kg⁻¹ BaP group were significantly reduced (P<0.05), and the mRNA expression of NR2A in the cortical tissue in the 1.00 mg·kg⁻¹ BaP group was reduced; the mRNA expression of NR2B in the cerebellar tissue in the 6.25 mg·kg⁻¹ BaP group was significantly reduced (P<0.05); there were no differences in the mRNA expressions of NMDA receptor subunits in the striatum tissue (P>0.05). Conclusion Subchronic BaP exposure can cause short-term spatial learning and memory impairment in rats, which may be related to the down-regulation of mRNA expressions of NR1, NR2A, and NR2B in hippocampus, changes of mRNA expressions of NR1, NR2A, and NR2B in cortical area, and the down-regulation of NR2B mRNA expression in cerebellum.

【Objective】 To explore the causal relationship between education level and pancreatitis risk through Mendelian randomization. 【Methods】 A two-sample Mendelian randomization analysis was conducted using genome-wide association study (GWAS) summary data. The GWAS data for education level and pancreatitis were obtained from SSGAC database and the FinnGen database (version R9). Causal relationship between education level and pancreatitis was explored using the inverse variance weighted (IVW), MR-Egger, and weighted median methods. Heterogeneity and directional pleiotropy were evaluated using Cochran’s Q test and funnel plots. 【Results】 Totally 604 SNPs associated with education level were included. The results provided evidence that there was negative relationship between education level and pancreatitis risk. For acute pancreatitis, OR=0.52, 95% CI: 0.44-0.62, P=2.43×10^-14 while for chronic pancreatitis, OR=0.51, 95% CI: 0.41-0.64, P=7.20×10^-9. Results from MR-Egger and weighted median analyses obtained the same results. The results of sensitivity analysis indicated that this study did not violate the basic assumptions of Mendelian randomization. 【Conclusion】 There is a causal relationship between education level and the occurrence of pancreatitis. The educational level is negatively correlated with the risk of pancreatitis.