ObjectiveTo investigate the association of serum exosomal microRNAs （miRNAs） with hepatic inflammatory injury and histological outcomes in patients with chronic hepatitis B （CHB）. MethodsPeripheral serum samples were collected from six healthy adults and six patients with CHB， and size exclusion chromatography was used to extract exosomes. Small RNA sequencing and transcriptomic analysis were used to identify the serum exosomal miRNAs associated with liver inflammatory injury and fibrosis， and quantitative real-time PCR was used for validation in a mouse model of acute liver injury induced by lipopolysaccharide/D-galactosamine， a rat model of liver fibrosis induced by carbon tetrachloride， and 84 CHB patients undergoing liver biopsy twice before and after treatment. The independent-samples t test was used for comparison of normally distributed continuous data between two groups； an analysis of variance was used for comparison between multiple groups， and the Tukey test was used for further comparison between two groups. The Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups； the Kruskal-Wallis H test was used for comparison between multiple groups， and the Dunn test was used for further comparison between two groups. The chi-square test or the Fisher’s exact test was used for comparison of categorical data between groups. The univariate and multivariate Logistic regression analyses were used to investigate influencing factors. ResultsAbnormal expression of serum exosomal miR-122-5p was observed in patients with CHB， and it was downregulated in patients with confluent necrosis and advanced fibrosis. In the mouse model of acute liver injury and the rat model of liver fibrosis， compared with the control group， the model group had a significant reduction in the expression level of miR-122-5p in the liver （P=0.048 and 0.014）， and compared with the patients with mild liver injury， the patients with severe confluent necrosis and advanced fibrosis showed a significant reduction in the expression level of miR-122-5p in liver tissue （P<0.05）. Among the 84 CHB patients， the patients with severe hepatic confluent necrosis or advanced liver fibrosis had a significantly lower expression level of serum exosomal miR-122-5p than those with mild liver injury （P<0.001 and P=0.003）. The multivariate Logistic regression analysis showed that the expression level of miR-122-5p was an independent influencing factor for confluent necrosis （odds ratio ［OR］=0.001， 95% confidence interval ［CI］： 0.000‍ ‍—‍ ‍0.037， P=0.005） and liver fibrosis degree （OR=0.568， 95%CI： 0.331‍ ‍—‍ ‍0.856， P=0.019）. In addition， compared with the patients with low expression of miR-122-5p， the patients with high expression of miR-122-5p before treatment had a significantly higher reversal rate of liver fibrosis after 72 weeks of antiviral therapy （64.3% vs 38.1%， P=0.029）. ConclusionSerum exosomal miR-122-5p in CHB patients is closely associated with the progression of hepatic confluent necrosis and fibrosis， and the reduction in the expression level of miR-122-5p may aggravate hepatic confluent necrosis， promote the progression of fibrosis， and affect the histological outcome of CHB patients after antiviral therapy.

Objective To construct a risk prediction model for intraoperative acquired pressure injury(IAPI)during neurosurgery in pediatric patients,and verify the predictive effect of the model,to provide a reference for preventing IAPI during neurosurgery in pediatric patients.Methods The clinical data of 776 pediatric patients undergoing neurosurgery in a tertiary-level hospital in Chongqing from January to June 2023 were retrospectively collected.The risk factors for IAPI were explored through univariate analysis and binary Logistic regression analysis.The fitting degree and predictive effect of the model were verified by Hosmer-Lemeshow test and receiver operator characteristic(ROC)curve,respectively.The model was validated internally by Bootstrap.Results The incidence of IAPI during neurosurgery in pediatric patients was 7.99％.Logistic regression analysis showed that bleeding volume,anesthesia time,age,intraoperative use of instruments such as drills and milling cutters that increase external force,and surgical position were the factors influencing IAPI in neurosurgical children(all P＜0.05).The results of the Hosmer-Lemeshow test showed that x2=3.636,P=0.888.The results of internal verification showed that the sensitivity of the model was 0.59;the specificity was 0.81;the area under the ROC curve was 0.79.Conclusion This study analyzes the risk factors for IAPI during neurosurgery in pediatric patients and constructs a line chart prediction model with good predictive performance,which can provide a reference for individualized prediction of the risk of IAPI during neurosurgery in pediatric patients.It can provide a scientific basis for clinical nursing staff to identify high-risk children with IAPI early and take personalized preventive measures in time.

Objective To investigate the association of serum exosomal microRNAs(miRNAs)with hepatic inflammatory injury and histological outcomes in patients with chronic hepatitis B(CHB).Methods Peripheral serum samples were collected from six healthy adults and six patients with CHB,and size exclusion chromatography was used to extract exosomes.Small RNA sequencing and transcriptomic analysis were used to identify the serum exosomal miRNAs associated with liver inflammatory injury and fibrosis,and quantitative real-time PCR was used for validation in a mouse model of acute liver injury induced by lipopolysaccharide/D-galactosamine,a rat model of liver fibrosis induced by carbon tetrachloride,and 84 CHB patients undergoing liver biopsy twice before and after treatment.The independent-samples t test was used for comparison of normally distributed continuous data between two groups;an analysis of variance was used for comparison between multiple groups,and the Tukey test was used for further comparison between two groups.The Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups;the Kruskal-Wallis H test was used for comparison between multiple groups,and the Dunn test was used for further comparison between two groups.The chi-square test or the Fisher's exact test was used for comparison of categorical data between groups.The univariate and multivariate Logistic regression analyses were used to investigate influencing factors.Results Abnormal expression of serum exosomal miR-122-5p was observed in patients with CHB,and it was downregulated in patients with confluent necrosis and advanced fibrosis.In the mouse model of acute liver injury and the rat model of liver fibrosis,compared with the control group,the model group had a significant reduction in the expression level of miR-122-5p in the liver(P=0.048 and 0.014),and compared with the patients with mild liver injury,the patients with severe confluent necrosis and advanced fibrosis showed a significant reduction in the expression level of miR-122-5p in liver tissue(P<0.05).Among the 84 CHB patients,the patients with severe hepatic confluent necrosis or advanced liver fibrosis had a significantly lower expression level of serum exosomal miR-122-5p than those with mild liver injury(P<0.001 and P=0.003).The multivariate Logistic regression analysis showed that the expression level of miR-122-5p was an independent influencing factor for confluent necrosis(odds ratio[OR]=0.001,95%confidence interval[CI]:0.000-0.037,P=0.005)and liver fibrosis degree(OR=0.568,95%CI:0.331-0.856,P=0.019).In addition,compared with the patients with low expression of miR-122-5p,the patients with high expression of miR-122-5p before treatment had a significantly higher reversal rate of liver fibrosis after 72 weeks of antiviral therapy(64.3%vs 38.1%,P=0.029).Conclusion Serum exosomal miR-122-5p in CHB patients is closely associated with the progression of hepatic confluent necrosis and fibrosis,and the reduction in the expression level of miR-122-5p may aggravate hepatic confluent necrosis,promote the progression of fibrosis,and affect the histological outcome of CHB patients after antiviral therapy.

Objective To construct a risk prediction model for intraoperative acquired pressure injury(IAPI)during neurosurgery in pediatric patients,and verify the predictive effect of the model,to provide a reference for preventing IAPI during neurosurgery in pediatric patients.Methods The clinical data of 776 pediatric patients undergoing neurosurgery in a tertiary-level hospital in Chongqing from January to June 2023 were retrospectively collected.The risk factors for IAPI were explored through univariate analysis and binary Logistic regression analysis.The fitting degree and predictive effect of the model were verified by Hosmer-Lemeshow test and receiver operator characteristic(ROC)curve,respectively.The model was validated internally by Bootstrap.Results The incidence of IAPI during neurosurgery in pediatric patients was 7.99％.Logistic regression analysis showed that bleeding volume,anesthesia time,age,intraoperative use of instruments such as drills and milling cutters that increase external force,and surgical position were the factors influencing IAPI in neurosurgical children(all P＜0.05).The results of the Hosmer-Lemeshow test showed that x2=3.636,P=0.888.The results of internal verification showed that the sensitivity of the model was 0.59;the specificity was 0.81;the area under the ROC curve was 0.79.Conclusion This study analyzes the risk factors for IAPI during neurosurgery in pediatric patients and constructs a line chart prediction model with good predictive performance,which can provide a reference for individualized prediction of the risk of IAPI during neurosurgery in pediatric patients.It can provide a scientific basis for clinical nursing staff to identify high-risk children with IAPI early and take personalized preventive measures in time.

OBJECTIVE To separate and identif y the chemical constituen ts in 70％ ethanol extract of Sabia parviflora ，and to preliminarily evaluate their in vitro antioxidant activity. METHODS The chemical constituents were separated and purified by silica gel，ODS reversed-phase silica gel ，Sephadex-LH20 column and preparative high performance liquid chromatography. The structures of the isolated compounds were identified by 1H-NMR，13C-NMR and ESI-MS. The in vitro antioxidant activities of the compounds were investigated by 2，2-diphenyl-1-picrylhydrazyl radical （DPPH·），2，2′-azino-bis（3-ethylbenzothiazoline-6- sulfonate）diammonium radical （ABST+）and hydroxyl radical （OH·）. RESULTS A total of 9 compounds were isolated from the 70％ ethanol extracts of S. parviflora . They were identified as rutin （1），diiononyl phthalate （2），dibutyl phthalate （3），vomifoliol （4），rhododendrol（5），quercetin-3-O-gentiobioside（6），narcissoside（7），kaempferol-3-O-rutinoside（8）and bonaroside （9）. The in vitro antioxidant results showed that compound 1-9 showed certain in vitro antioxidant activity ，and the half scavenging concentrations of compound 1，6，7 and 8 to DPPH ·，ABST+，OH·were lower than 70 μg/mL. CONCLUSIONS Vomifoliol， rhododendrol and bonaroside are isolated from S. parviflora for the first time ，and rutin ，quercetin-3-O-gentiobioside，narcissoside and kaempferol- 3-O-rutinoside show good in vitro antioxidant activity.

Objective:To investigate the expression of Piezo1 in small intestinal mucosal epithelial cells of patients with Crohn′s disease (CD) and its clinical correlation with CD.Methods:From January 1st 2010 to November 30th 2020, the clinical data including age, gender, disease location and biological behavior, etc of 57 patients with CD (CD group) who underwent surgery at The First Affiliated Hospital of Anhui Medical University were retrospectively. And at same time the normal samll intestinal epithelial tissues of 10 healthy individuals who underwent colonoscopy were collected as the healthy control group. The expression of Piezo1 in small intestinal epithelial cells of CD patients with different disease sites, biological behavior and disease activity were detected by immunofluorescence staining and hematoxylin-eosin staining. The histological score system and intestinal fibrosis score were used to analyze the inflammation and fibrosis of the intestinal tissues of patients with CD. Semi-quantitative analysis of Piezo1 in small intestinal epithelial cells was analyzed by ImageJ software. And the correlation between Piezo1 expression and clinical characteristics and pathological features of small intestine was also analyzed. Independent sample t test and analysis of variance were used for statistical analysis. Results:In CD group, there were 37 males (64.9%) and 20 females (35.1%). The age was (39.1±14.2) years old, ranged from 18 to 71 years old, and the average duration of the disease was (26.5±24.1) months. There were 29 cases (50.9%)of ileal type, 26 cases (45.6%) of ileocolonin type and 2 cases (3.5%) of colonic type. There were 12 cases (21.1%) of non-penetrating non-stenotic type, 31 cases (54.4%) of stenotic type and 14 cases (24.6%) of penetrating type. There were 47 cases (82.5%) with moderate activity and 10 cases (17.5%) with severe activity. There were 17 cases (29.8%) of moderate intestinal inflammation, 40 cases (70.2%) of severe intestinal inflammation. The score of intestinal fibrosis in six cases (10.5%) was 1, 28 cases (49.1%) was 2, 18 cases (31.6%) was 3, five cases was 4. The relative expression level of Piezo1 in intestinal mucosal epithelial cells of CD group was higher than that of healthy control group (12.9±4.6 vs. 8.5±1.1), the relative expression of Piezo1 in intestinal mucosal epithelia cells of stenotic type and penetrating type CD patients were both higher than that of non-penetrating and non-stenotic CD patients (12.6±3.8 and 9.8±2.4 vs. 6.0±1.3), and the differences were all statistically significant ( t=3.00, -3.66 and -3.32, all P<0.01). The relative expression of Piezo1 in small intestinal epithelial cells of CD patients with severe intestinal inflammation was higher than that of CD patients with moderate intestinal inflammation (13.1±4.0 vs. 9.7±3.1), and the difference was statistically significant ( t=-2.65, P<0.05). The relative expression levels of Piezo1 in small intestinal epithelial cells of patients with intestinal fibrosis score of 4, 3, 2 and 1 were 17.6±5.2, 12.6±1.7, 9.1±2.1 and 5.8±1.1, respectively; the relative expression levels of Piezo1 in intestinal epithelial cells of patients scored 4 were higher than that of patients scored 3, 2 and 1, and that of patients scored 3 was higher than patients scored 2 and 1, and that of patients scored 2 was higher than that of patients scored 1, and the differences were all statistically significant ( t=-2.98, -5.10, -3.84, 4.60, 6.55 and 2.56, all P<0.05). The relative expression of Piezo1 in intestinal mucosal epithelial cells was related to the severity of intestinal inflammation and fibrosis. The more severe the intestinal inflammation and fibrosis, the higher the relative expression of Piezo1 in intestinal mucosal epithelial cells. Conclusions:The relative expression of Piezo1 in small intestinal epithelial cells is related to the biological behavior and the severity of intestinal inflammation and fibrosis of CD. It is speculated that the expression of Piezo1 in small intestinal epithelial cells may be clinically related to the process of intestinal wall fibrosis in CD to some extent, however whether it plays an important role in the process of intestinal wall fibrosis in CD and its specific mechanism need to be further studied.

OBJECTIVE：To prepare chelerythrine nanoparticles（CHE-NPs），optimize their formulation ，and evaluate its drug release behavior in vitro and its inhibitory effect on melanoma. METHODS ：Using methoxy polyethylene glycol-poly （lactic-co- glycolic acid ）（mPEG-PLGA）as carrier ，CHE-NPs were prepared by the nano-precipitation method. HPLC method and dialysis bag method were used to determine entrapment efficiency and drug loading. The formulation of CHE-NPs was optimized by Box-Behnken response surface design using overall desirability （OD）of them as dependent variables ，CHE dosage ，mPEG-PLGA concentration and poloxamer 188（F68）concentration as independent variables. The particle size and Zeta potential of CHE-NPs prepared by the optimal formulation were detected ；the characteristics of drug release in vitro were investigated ；the effects of CHE and CHE-NPs on survival rate of mice B 16 melanoma cells were compared ，and median inhibition concentrations （IC50）of them were calculated. RESULTS ：The optimal formulation included CHE of 2 mg，mPEG-PLGA of 13 mg/mL，F68 of 1.8％. Average entrapment efficiency rate of CHE-NPs prepared by the optimal formulation was （80.18±1.11）％，average drug loading was （11.36±0.28）％，average OD value was 0.96±0.04 [the relative deviation from predicted value （0.90）of OD was 6.67％]； particle size was （113.1±1.40）nm，and Zeta potential was （－21.6±0.29）mV；polydispersity index was 0.07±0.01（n＝3）； accumulative release rates of CHE control and CHE-NPs were 90.87％ and 68.68％ within 8 h，and drug release behavior in vitro of the latter was in accordance with Weibull kinetic model. Inhibitory effect of CHE-NPs on B 16 melanoma cells was significantly stronger than that of CHE ；the 24 h IC 50 of CHE-NPs and CHEwere 69.35 and 107.36 μg/mL，respectively. CONCLUSIONS ：The prepared CHE-NPs show good sustained-effect and high capacity of drug loading ，and strengthen the inhibitory effect of CHE on melanoma.

Objective:To explore the clinical characteristics and establish a corresponding prognostic scoring model in patients with early-stage clinical features of hepatitis B-induced acute-on-chronic liver failure (HBV-ACLF).Methods:Clinical characteristics of 725 cases with hepatitis B-related acute-on-chronic hepatic dysfunction (HBV-ACHD) were retrospectively analyzed using Chinese group on the study of severe hepatitis B (COSSH). The independent risk factors associated with 90-day prognosis to establish a prognostic scoring model was analyzed by multivariate Cox regression, and was validated by 500 internal and 390 external HBV-ACHD patients.Results:Among 725 cases with HBV-ACHD, 76.8% were male, 96.8% had cirrhosis base,66.5% had complications of ascites, 4.1% had coagulation failure in respect to organ failure, and 9.2% had 90-day mortality rate. Multivariate Cox regression analysis showed that TBil, WBC and ALP were the best predictors of 90-day mortality rate in HBV-ACHD patients. The established scoring model was COSS-HACHADs = 0.75 × ln(WBC) + 0.57 × ln(TBil)-0.94 × ln(ALP) +10. The area under the receiver operating characteristic curve (AUROC) of subjects was significantly higher than MELD, MELD-Na, CTP and CLIF-C ADs( P < 0.05). An analysis of 500 and 390 cases of internal random selection group and external group had similar verified results. Conclusion:HBV-ACHD patients are a group of people with decompensated cirrhosis combined with small number of organ failure, and the 90-day mortality rate is 9.2%. COSSH-ACHDs have a higher predictive effect on HBV-ACHD patients' 90-day prognosis, and thus provide evidence-based medicine for early clinical diagnosis and treatment.

Objective To study the nutritional status of pregnant women in Shanxi Province before and after the implementation of the new standards of iodized salt content,provide the basis for scientific supplementation of iodine for pregnant women.Methods According to the method of population proportion sampling,30 county-level monitoring sites were selected,a primary school was selected from each county (city,district) by the method of simple random sampling and 40 students in 2011 or 50 students in 2014 aged 8-10 years were selected in each school,direct titration was used to detect salt iodine;at the same time,20 pregnant women were selected from each town where the primary school was located and urinary iodine was determined using arsenic cerium catalytic spectrophotometry (WS/T 107-2006).Results A total of 1 182 and 1 437 salt samples was detected in Shanxi Province in 2011 and 2014,the median of salt iodine was 30.5 and 24.1 mg/kg,respectively,and the difference was statistically significant (H =567.45,P ＜ 0.01);it was 95.41％,80.31％,76.62％ of the coverage rate of iodized salt,qualified rate of iodized salt,qualified iodized salt consumption rate in 2014,respectively;which were compared with those in 2011 (97.63％,97.49％,95.18％),the differences were statistically significant (x2 =9.27,232.40,166.25,P ＜ 0.01).A total of 440 and 630 urinary samples of pregnant women were tested in 2011 and 2014,the median of urinary iodine was 279.6 and 177.1 μg/L,respectively,iodine nutrition of pregnant women was more than adequate in 2011,and iodine nutrition was suitable in 2014.The difference was statistically significant (H =153.89,P ＜ 0.01).The proportion of pregnant women's median of urinary iodine less than 150 μg/L in 2014 [41.11％ (259/ 630)] was significantly higher than that in 2011 [8.18％ (36/440),x2 =140.68,P ＜ 0.01].The constituent ratio of 250 to 500 μg/L was significantly decreased [23.65％ (149/630) vs 54.77％ (241/440),x2 =108.33,P ＜ 0.01).Conclusion It is at a reasonable level of iodine nutrition level of pregnant women in Shanxi after the adjustment of iodized salt content,but the ratio of ＜ 150 μg/L is increasing,which needs to be paid attention to.

To explore the efficacy and influencing factors of allogeneic hematopoietic stem cell transplantation (allo-HSCT) in patients with myeloid leukemia and granulocytic sarcoma (GS).Clinical outcome including hematopoietic reconstitution,transplant-related complications,survival and relapse were collected and retrospectively analyzed in 9 patients with myeloid leukemia and GS after allo-HSCT.Hematopoiesis reconstitution was achieved in all the 9 recipients.Four cases developed acute graft-versus-host disease (GVHD),and 1 with chronic GVHD.The median follow-up time after transplantation was 10(4-81) months.Only 2 cases survived,the other 7 died of relapse.The median time of relapse after transplantation was 5(3-19) months.Allo-HSCT is relatively effective treatment for patients with myeloid leukemia and GS.Relapse after transplantation remains the major factor of mortality.