Objective To analyze the CRE and UREA result of university students,and establish the refer-ence interval for CRE,UREA adapted to this university.Methods Performing serum analysis of 2 926 freshmen for CRE,UREA with the automatic biochemical analyzer ( Olympus AU400 ) .Results Reference intervals were get among freshmen as CRE:74.00-109.00μmol/L (M),59.00-85.00 μmol/L (F),and it was different between male and female(Z =-27.27,P <0.01);UREA:2.70 -6.70mmol/L (male aged 16 -24 years),1.90 -5.70mmol/L (female aged 16-24 years),2.30-6.57mmol/L (male aged >24-45 years),1.94-5.11mmol/L ( female aged 25-45 years) .Conclusion The reference intervals disaggregated by sex and age are initially estab-lished.

Objective To investigate the effects of andrographolide on the expressions of Th1 cytokine [interferon (IFN)-γ] mRNA and Th2 cytokines [interleukin (ID-4, IL-10] mRNA of peripheral blood mononuclear cells (PBMCs) from patients with chronic hepatitis B (CHB) and its anti-hepatitis B virus (HBV) activity. Methods PBMCs from CHB patients were cultured with 10 mg/L andrographolide (experimental group) or 0.1% DMSO (control group). HepG2. 2. 15 cells were stimulated with andrographolide of different concentrations (experimental group) or adefovir (control group). The expressions of IFN-γ mRNA, IL-4 mRNA and IL-10 mRNA of PBMCs and the replication of HBV DNA in HepG2. 2. 15 cell line were detected by fluorescence quantitative PCR. Results The expression of IFN-γ mRNA in PBMCs cultured with 10 mg/L andrographolide for 16 h was higher than that in control group (Z=-2. 78, P=0. 05), and the expressions of IL-4 and IL-10mRNA in experimental group were lower than control group (Z= -3. 82, P<0. 01), while the ratio of IFN-γ/IL-4 mRNA was higher than control group (Z= - 3. 82, P<0. 01). Andrographolide with different concentrations had no effect on the replication of HBV DNA in HepG2. 2.15 cells ((=11. 88, P>0.05). However, adefovir had inhibitory effect on the replication of HBV DNA (t =15. 95,P< 0. 05). Conclusion Andrographolide can regulate the expressions of IFN-γ mRNA, IL-4 mRNA and IL-10 mRNA in PBMCs from CHB patients and improve Thl/Th2 balance, while it has no effect on the replication of HBV DNA.

Background: Early diagnosis and staging of liver fibrosis are important for the prognosis and evaluating the survival of patients.Aims: To systematically assess the diagnostic value of transient elastography (TE) for staging of liver fibrosis in patients with chronic liver disease.Methods: PubMed,Embase,Cochrane Library,CNKI,Wanfang and VIP from Jan.2001 to Dec.2015 were retrieved to collect the articles with staging of liver fibrosis in patients with chronic liver disease by TE.Data extraction was conducted.Article quality was evaluated by quality assessment of diagnostic accuracy studies 2 (QUADAS2).Meta-analysis was conducted by Stata 12.0 software.Results: Twenty articles involving 5 748 patients were included.Meta-analysis showed that the combined sensitivity,specificity and AUC of TE for diagnosing significant fibrosis (≥F2) were 0.78 (95％ CI: 0.73-0.82),0.85 (95％ CI: 0.80-0.88) and 0.88 (95％ CI: 0.85-0.91),respectively.The combined sensitivity,specificity and AUC for advanced fibrosis (≥F3) were 0.89 (95％ CI: 0.86-0.91),0.88 (95％ CI: 0.85-0.91) and 0.94 (95％ CI: 0.92-0.96),respectively.The combined sensitivity,specificity and AUC for cirrhosis (F4) were 0.91 (95％ CI: 0.86-0.95),0.89 (95％ CI: 0.87-0.92) and 0.95 (95％ CI: 0.93-0.97),respectively.Conclusions: TE technique has a good diagnostic value in assessing significant fibrosis,advanced fibrosis and cirrhosis in patients with chronic liver disease,especially for advanced fibrosis and cirrhosis.

OBJECTIVE:To investigate the characteristics of cecum and colon-specific drug delivery system of 4-aminosalicyl-ic acid-maltoside (4-ASA-Mal) in vitro. METHODS:With the cumulative release rate of 4-ASA as the index,HPLC was em-ployed to observe the delivery of 4-ASA-Mal (equivalent to 250 μg/ml 4-ASA) in the buffer solutions of different pH (1.2,6.8 and 7.4)and in the aqueous contents in different parts(stomach,small intestine,cecum and colon)of normal rats and the rat mod-els of ulcerative colitis. RESULTS:4-ASA-Mal was hardly released in the buffer solutions of different pH. 12 h cumulative release rates were less than 8% in the aqueous contents in the stomachs and small intestines of normal rats and rat models,and were 55%and 81% in the aqueous contents in the cecum and colons of normal rats,and 55% and 74% in the aqueous contents in the cecum and colons of model rats with ulcerative colitis. CONCLUSIONS:4-ASA-Mal can release a lot of 4-ASA in aqueous contents in ce-cum and colon,targeting cecum and colon in vitro.

Objective To observe the therapeutic efficacy of extended therapy with interferon and a nucleoside analogue for treating patients with HBeAg?positive chronic hepatitis B( CHB)?Methods Sixty cases patients diagnosed with CHB in You′an Hospital of Beijing Affiliated to Capital Medical University from March 2012 to May 2015 were retrospectively analyzed?They were divided into group A with 29 cases and group B with 31 cases according to different treatment methods?Group A were treated with pegylated interferonα?2a( Peg?IFNα?2a) combined with adefovir dipivoxil for 96 weeks,group B were treated with Peg?IFN α?2a combined with adefovir and lamivudine for 96 weeks?The patients'recovery rate of ALT,hepatitis B virus( HBV) DNA response rate and HBeAg and HBsAg seroconversion rate and conversion rate of 12,24,48,96 weeks in the treatment were observed?Results There were no significant differences in recovery rate of ALT,hepatitis B virus( HBV) DNA response rate,HBeAg seroconversion rate and HBsAg seroconversion rate between the two groups at differenct time points( P>0?05)?HBeAg seroconversion rates in group A were 34?5% at 48 weeks,62?1% at 96 weeks, and the difference was significant( P=0?036)?HBeAg seroconversion rates in group B were 35?5% at 48 weeks, 61?3% at 96 weeks,and the difference was significant ( P=0?042)?Conclusion The treatment of peginterferonα?2a in combination with adefovir dipivoxil and lamivudine is not more efficacious than peginterferon α?2a in combination with adefovir dipivoxil?The extended treatment of Peg? IFNα?2a plus a nucleoside analogue can achieve high rates of HBeAg seroconversion in patients with HBeAg?positive CHB.

OBJECTIVETo investigate the effect of cyclic stretch on p38 mitogen-activated protein kinase (p38MAPK) signaling pathway during stretch-induced differentiation process of C2C12 myoblasts.

METHODSC2C12 cells were seeded on Bio Flex 6-well plates, and cells were subsequently subjected to cyclic stretch at an optimal magnitude (10%) and frequency (0.5 Hz). The effects of cyclic stretch were examined at 2, 6, 12, 24 h. Antibodies specific to p38MAPK phosphorylated forms and the total protein levels of the p38MAPK were examined using Western blot analysis.

RESULTSThese results indicated that p38MAPK was activated during stretch-induced C2C12 cell differentiation. The level of phosphorylated protein was higher in the p38MAPK signaling pathway. The expression of total protein was maintained at baseline level. There were no significant differences between groups. Treatment of cells with specific p38MAPK inhibitor SB203580 could decrease the expression of myogenin, but not completely abolish the myogenin expression after stretch.

CONCLUSIONp38MAPK signaling pathway plays an important role during stretch-induced differentiation process of C2C12 myoblasts, but is not activated exclusively in this process.

Objective: This study investigates the potential of radiomics to predict postoperative progression of ossification of the posterior longitudinal ligament (OPLL) after posterior cervical spine surgery. Methods: This retrospective study included 473 patients diagnosed with OPLL at Peking University Third Hospital between October 2006 and September 2022. Patients underwent posterior spinal surgery and had at least 2 computed tomography (CT) examinations spaced at least 1 year apart. OPLL progression was defined as an annual growth rate exceeding 7.5%. Radiomic features were extracted from preoperative CT images of the OPLL lesions, followed by feature selection using correlation coefficient analysis and least absolute shrinkage and selection operator, and dimensionality reduction using principal component analysis. Univariable analysis identified significant clinical variables for constructing the clinical model. Logistic regression models, including the Rad-score model, clinical model, and combined model, were developed to predict OPLL progression. Results: Of the 473 patients, 191 (40.4%) experienced OPLL progression. On the testing set, the combined model, which incorporated the Rad-score and clinical variables (area under the receiver operating characteristic curve [AUC] = 0.751), outperformed both the radiomics-only model (AUC = 0.693) and the clinical model (AUC = 0.620). Calibration curves demonstrated good agreement between predicted probabilities and observed outcomes, and decision curve analysis confirmed the clinical utility of the combined model. SHAP (SHapley Additive exPlanations) analysis indicated that the Rad-score and age were key contributors to the model’s predictions, enhancing clinical interpretability. Conclusion Radiomics, combined with clinical variables, provides a valuable predictive tool for assessing the risk of postoperative progression in cervical OPLL, supporting more personalized treatment strategies. Prospective, multicenter validation is needed to confirm the utility of the model in broader clinical settings.

Objective: This study investigates the potential of radiomics to predict postoperative progression of ossification of the posterior longitudinal ligament (OPLL) after posterior cervical spine surgery. Methods: This retrospective study included 473 patients diagnosed with OPLL at Peking University Third Hospital between October 2006 and September 2022. Patients underwent posterior spinal surgery and had at least 2 computed tomography (CT) examinations spaced at least 1 year apart. OPLL progression was defined as an annual growth rate exceeding 7.5%. Radiomic features were extracted from preoperative CT images of the OPLL lesions, followed by feature selection using correlation coefficient analysis and least absolute shrinkage and selection operator, and dimensionality reduction using principal component analysis. Univariable analysis identified significant clinical variables for constructing the clinical model. Logistic regression models, including the Rad-score model, clinical model, and combined model, were developed to predict OPLL progression. Results: Of the 473 patients, 191 (40.4%) experienced OPLL progression. On the testing set, the combined model, which incorporated the Rad-score and clinical variables (area under the receiver operating characteristic curve [AUC] = 0.751), outperformed both the radiomics-only model (AUC = 0.693) and the clinical model (AUC = 0.620). Calibration curves demonstrated good agreement between predicted probabilities and observed outcomes, and decision curve analysis confirmed the clinical utility of the combined model. SHAP (SHapley Additive exPlanations) analysis indicated that the Rad-score and age were key contributors to the model’s predictions, enhancing clinical interpretability. Conclusion Radiomics, combined with clinical variables, provides a valuable predictive tool for assessing the risk of postoperative progression in cervical OPLL, supporting more personalized treatment strategies. Prospective, multicenter validation is needed to confirm the utility of the model in broader clinical settings.

Objective: This study investigates the potential of radiomics to predict postoperative progression of ossification of the posterior longitudinal ligament (OPLL) after posterior cervical spine surgery. Methods: This retrospective study included 473 patients diagnosed with OPLL at Peking University Third Hospital between October 2006 and September 2022. Patients underwent posterior spinal surgery and had at least 2 computed tomography (CT) examinations spaced at least 1 year apart. OPLL progression was defined as an annual growth rate exceeding 7.5%. Radiomic features were extracted from preoperative CT images of the OPLL lesions, followed by feature selection using correlation coefficient analysis and least absolute shrinkage and selection operator, and dimensionality reduction using principal component analysis. Univariable analysis identified significant clinical variables for constructing the clinical model. Logistic regression models, including the Rad-score model, clinical model, and combined model, were developed to predict OPLL progression. Results: Of the 473 patients, 191 (40.4%) experienced OPLL progression. On the testing set, the combined model, which incorporated the Rad-score and clinical variables (area under the receiver operating characteristic curve [AUC] = 0.751), outperformed both the radiomics-only model (AUC = 0.693) and the clinical model (AUC = 0.620). Calibration curves demonstrated good agreement between predicted probabilities and observed outcomes, and decision curve analysis confirmed the clinical utility of the combined model. SHAP (SHapley Additive exPlanations) analysis indicated that the Rad-score and age were key contributors to the model’s predictions, enhancing clinical interpretability. Conclusion Radiomics, combined with clinical variables, provides a valuable predictive tool for assessing the risk of postoperative progression in cervical OPLL, supporting more personalized treatment strategies. Prospective, multicenter validation is needed to confirm the utility of the model in broader clinical settings.

Inflammatory bowel disease(IBD)is a serious disorder,and exploration of active compounds to treat it is necessary.An acidic polysaccharide named SUSP-4 was purified from Selaginella uncinata(Desv.)Spring,which contained galacturonic acid,galactose,xylose,arabinose,and rhamnose with the main chain structure of →4)-α-D-GalAp-(1 → and →6)-β-D-Galp-(1 → and the branched structure of →5)-α-L-Araf-(1 →.Animal experiments showed that compared with Model group,SUSP-4 significantly improved body weight status,disease activity index(DAI),colonic shortening,and histopathological damage,and elevated occludin and zonula occludens protein 1(ZO-1)expression in mice induced by dextran sulfate sodium salt(DSS).16S ribosomal RNA(rRNA)sequencing indicated that SUSP-4 markedly downregulated the level of Akkermansia and Alistipes.Metabolomics results confirmed that SUSP-4 obviously elevated thiamine levels compared with Model mice by adjusting thiamine metabolism,which was further confirmed by a targeted metabolism study.Fecal transplantation experiments showed that SUSP-4 exerted an anti-IBD effect by altering the intestinal flora in mice.A mechanistic study showed that SUSP-4 markedly inhibited macrophage activation by decreasing the levels of phospho-nuclear factor kappa-B(p-NF-κB)and cyclooxygenase-2(COX-2)and elevating NF-E2-related factor 2(Nrf2)levels compared with Model group.In conclusion,SUSP-4 affected thiamine metabolism by regulating Akker-mania and inhibited macrophage activation to adjust NF-κB/Nrf2/COX-2-mediated inflammation and oxidative stress against IBD.This is the first time that plant polysaccharides have been shown to affect thiamine metabolism against IBD,showing great potential for in-depth research and development applications.