Objective To investigate the status and distribution characteristics of human immuno-deficiency virus(HIV)infection,and the relationship between sample value/cut-off value(S/CO value)and positive test when HIV is tested reactivity by chemiluminescence immunoassay(CLIA).Methods The data of 820 HIV reactivity samples screened by Abbott CLIA in the Department of Clinical Laboratory of Affiliated Hospital of Inner Mongolia Medical University from 2017 to 2023 were selected as the research objects.SPSS22.0 software was used for statistical analysis according to different years,genders and ages.The distribution characteristics of screening reactivity and confirmed positive immunoblot test was compared.The relationship between the confirmed positive,uncertain and negative results and their S/CO values,and the distribution of corresponding bands were retrospectively analyzed.Results From 2017 to 2023,the total number of HIV positive patients decreased first decreased and then increased.The positive rate was 31.95%(262/820),the ratio of males to females was 6.7∶1,the gender difference was statistically significant(χ2=126.8,P<0.05).The ratio of men to women who responded to the screening test was 1.4∶1.The age group with the most confirmed positives for both men and women was 30～50 years old.Divided into five groups according to S/CO value,the positive rate was 0%(0/436)in 1.0≤S/CO≤5.0 group,the positive rate was 6.90%(4/58)in 5.0＜S/CO≤10.0 group,the positive rate was 25.86%(15/58)in 10.0＜S/CO≤50.0 group,the positive rate was 82.09%(110/134)in 50.0＜S/CO≤500.0 group,and the positive rate was 99.25%(133/134)in S/CO＞500.0 group,there was statistical significance in the number of confirmed positives among the five groups(χ2=816.3,P<0.05).There were 473 confirmed negative cases,more women than men,the difference was statistically significant(χ2=98.3,P<0.05),among which the results of S/CO value≤10.0 accounted for 90.49%(428/473).There were 85 uncertain cases,the gender difference was not statistically significant(χ2=1.3,P>0.05),among which the results of S/CO value≤10.0 accounted for 72.94%(62/85).The positive bands gp120 and gp160 appeared in all the results,and p55 appeared the least,accounted for 51.91%(136/262).The uncertain bands were mainly p24,followed by gp160,etc.To a certain extent,the higher the S/CO value of chemiluminescence screening test,the more bands were present when the confirmative test was positive,and the more bands were present when the confirmative test was uncertain.Conclusion The higher the S/CO value of chemiluminescence test for HIV screening test,the higher the positive rate of the confirmation test and the more positive bands,they have practical value for laboratory analysis and early clinical diagnosis.

Objective To develop a model for visualizing the risk of hemorrhagic transformation(HT)in acute ischemic stroke(AIS)patients after alteplase thrombolysis based on routine labo-ratory data.Methods A total of 252 AIS patients receiving alteplase thrombolysis in our hospital from January 2021 to January 2024 were enrolled,and then divided into HT group and non-HT group according to developing HT or not within 24 h after thrombolysis.The influencing factors for HT in AIS patients after alteplase thrombolysis were analyzed,and then a model of visualizing the risk was conducted and its predictive performance was verified.Results HT occurred in 52 out of 252 AIS patients(20.63％).The HT group had significantly higher ratio of hypertension,higher NIHSS score at admission,elevated neutrophil count,and increased D-dimer(D-D)and to-tal bilirubin(TBIL)levels,whereas lower uric acid(UA)and serum potassium levels when com-pared with the non-HT group(P＜0.05,P＜0.01).Multivariate logistic regression analysis identi-fied neutrophils,D-D,and TBIL as independent risk factors for HT(OR=2.753,95％CI:1.399-5.417,P=0.003;OR=1.987,95％CI:1.322-2.986,P=0.001;OR=2.121,95％CI:1.392-3.230,P=0.000),while UA and serum potassium were protective factors(OR=0.417,95％CI:0.202-0.860,P=0.027;OR=0.160,95％CI:0.028-0.911,P=0.039).The AUC value of the constructed model in predicting HT in AIS patients after alteplase thrombolysis was 0.920(95％CI:0.880-0.950),with a sensitivity of 96.15％and a specificity of 80.50％.Hosmer-Lemeshow test(x2=1.888,P=0.169)confirmed the model had good fit,and Bootstrap internal validation yielded a C-index of 0.921.Conclusion Neutrophils,D-D,and TBIL are risk factors,while UA and serum potassium are protective factors for HT in AIS patients following alteplase thrombolysis.Our developed model of risk visualization demonstrates robust predictive performance.

Objective To investigate the status and distribution characteristics of human immuno-deficiency virus(HIV)infection,and the relationship between sample value/cut-off value(S/CO value)and positive test when HIV is tested reactivity by chemiluminescence immunoassay(CLIA).Methods The data of 820 HIV reactivity samples screened by Abbott CLIA in the Department of Clinical Laboratory of Affiliated Hospital of Inner Mongolia Medical University from 2017 to 2023 were selected as the research objects.SPSS22.0 software was used for statistical analysis according to different years,genders and ages.The distribution characteristics of screening reactivity and confirmed positive immunoblot test was compared.The relationship between the confirmed positive,uncertain and negative results and their S/CO values,and the distribution of corresponding bands were retrospectively analyzed.Results From 2017 to 2023,the total number of HIV positive patients decreased first decreased and then increased.The positive rate was 31.95%(262/820),the ratio of males to females was 6.7∶1,the gender difference was statistically significant(χ2=126.8,P<0.05).The ratio of men to women who responded to the screening test was 1.4∶1.The age group with the most confirmed positives for both men and women was 30～50 years old.Divided into five groups according to S/CO value,the positive rate was 0%(0/436)in 1.0≤S/CO≤5.0 group,the positive rate was 6.90%(4/58)in 5.0＜S/CO≤10.0 group,the positive rate was 25.86%(15/58)in 10.0＜S/CO≤50.0 group,the positive rate was 82.09%(110/134)in 50.0＜S/CO≤500.0 group,and the positive rate was 99.25%(133/134)in S/CO＞500.0 group,there was statistical significance in the number of confirmed positives among the five groups(χ2=816.3,P<0.05).There were 473 confirmed negative cases,more women than men,the difference was statistically significant(χ2=98.3,P<0.05),among which the results of S/CO value≤10.0 accounted for 90.49%(428/473).There were 85 uncertain cases,the gender difference was not statistically significant(χ2=1.3,P>0.05),among which the results of S/CO value≤10.0 accounted for 72.94%(62/85).The positive bands gp120 and gp160 appeared in all the results,and p55 appeared the least,accounted for 51.91%(136/262).The uncertain bands were mainly p24,followed by gp160,etc.To a certain extent,the higher the S/CO value of chemiluminescence screening test,the more bands were present when the confirmative test was positive,and the more bands were present when the confirmative test was uncertain.Conclusion The higher the S/CO value of chemiluminescence test for HIV screening test,the higher the positive rate of the confirmation test and the more positive bands,they have practical value for laboratory analysis and early clinical diagnosis.

Objective To develop a model for visualizing the risk of hemorrhagic transformation(HT)in acute ischemic stroke(AIS)patients after alteplase thrombolysis based on routine labo-ratory data.Methods A total of 252 AIS patients receiving alteplase thrombolysis in our hospital from January 2021 to January 2024 were enrolled,and then divided into HT group and non-HT group according to developing HT or not within 24 h after thrombolysis.The influencing factors for HT in AIS patients after alteplase thrombolysis were analyzed,and then a model of visualizing the risk was conducted and its predictive performance was verified.Results HT occurred in 52 out of 252 AIS patients(20.63％).The HT group had significantly higher ratio of hypertension,higher NIHSS score at admission,elevated neutrophil count,and increased D-dimer(D-D)and to-tal bilirubin(TBIL)levels,whereas lower uric acid(UA)and serum potassium levels when com-pared with the non-HT group(P＜0.05,P＜0.01).Multivariate logistic regression analysis identi-fied neutrophils,D-D,and TBIL as independent risk factors for HT(OR=2.753,95％CI:1.399-5.417,P=0.003;OR=1.987,95％CI:1.322-2.986,P=0.001;OR=2.121,95％CI:1.392-3.230,P=0.000),while UA and serum potassium were protective factors(OR=0.417,95％CI:0.202-0.860,P=0.027;OR=0.160,95％CI:0.028-0.911,P=0.039).The AUC value of the constructed model in predicting HT in AIS patients after alteplase thrombolysis was 0.920(95％CI:0.880-0.950),with a sensitivity of 96.15％and a specificity of 80.50％.Hosmer-Lemeshow test(x2=1.888,P=0.169)confirmed the model had good fit,and Bootstrap internal validation yielded a C-index of 0.921.Conclusion Neutrophils,D-D,and TBIL are risk factors,while UA and serum potassium are protective factors for HT in AIS patients following alteplase thrombolysis.Our developed model of risk visualization demonstrates robust predictive performance.

ObjectiveThe full name of vertebroplasty is percutaneous vertebroplasty (PVP). It is a clinical technique that injects bone cement into the diseased vertebral body to achieve strengthening of the vertebra. The research on the safety and efficacy of bone cement is the basis for clinical application. In this study, vertebroplasty is used to evaluate and compare the safety and efficacy of Tecres and radiopaque bone cement in experimental pigs, and to determine the puncture method suitable for pigs and the pre-clinical evaluation method for the safety and efficacy of bone cement. MethodsTwenty-four experimental pigs (with a body weight of 60-80 kg) were randomly divided into an experimental group (Group A) and a control group (Group B). Group A was the Tecres bone cement group, and Group B was the radiopaque bone cement group, with 12 pigs in each group. Under the monitoring of a C-arm X-ray machine, the materials were implanted into the 1st lumbar vertebra (L1) and 4th lumbar vertebra (L4) of the pigs via percutaneous puncture using the unilateral pedicle approach. The animals were euthanized at 4 weeks and 26 weeks after the operation, respectively. The L4 vertebrae were taken for compressive strength testing, and the L1 vertebrae were taken for hard tissue pathological examination to observe the inflammatory response, bone necrosis, and degree of osseointegration at the implantation site. ResultsThe test results of compressive strength between groups A and B showed no significant difference at 4 weeks and 26 weeks after bone cement implantation (P > 0.05). Observation under an optical microscope (×100) revealed that at 4 weeks postoperatively, both groups A and B showed that the bone cement was surrounded by proliferative fibrous tissue, with lymphocyte infiltration around it. The bone cement was combined with bone tissue, the trabecular arrangement was disordered, and osteoblasts and a small amount of osteoid were formed. At 26 weeks postoperatively, bone cement was visible in both groups A and B. The new bone tissue was mineralized, the trabeculae were fused, the trabecular structure was regular and dense with good continuity, and no obvious inflammatory reaction was observed. ConclusionIn experimental pig vertebrae, there were no significant differences observed in the compressive strength, inflammation response, bone destruction, and integration with the bone between Tecres and non-radiopaque bone cement. Both exhibited good biocompatibility and osteogenic properties. It indicates that using vertebroplasty to evaluate the safety and efficacy of bone cement in pigs is scientifically sound.

Objective To investigate the impacts of polysaccharide from Ganoderma lucidum(PSG-1)on intestinal barrier function and Wnt/β-catenin signal pathway in rats with short bowel syndrome(SBS).Methods Fifty male SD rats were randomly divided into sham operation group,low dose PSG-1 group(25 mg?kg-1?d-1),medium dose PSG-1 group(50 mg?kg-1?d-1)and high dose PSG-1 group(100 mg?kg-1?d-1).SBS rat model was built,intestinal permeability of rats was detected,intestinal histopathology was observed with HE staining,and the bacterial translocation rate was calculated,the contents of inflammatory cytokines such as interleukin-6(IL-6),interleukin-10(IL-10)and tumor necrosis factor-α(TNF-α)were measured by ELISA,immunofluorescence was used to detect the expression and distribution of tight junction protein in ileum,Western blot was used to detect the expression of Wnt and β-catenin.Results Compared with the control group,the villi of ileum in SBS group were sparse,and the villi length,recess depth,Fluorescein isothiocyanate-dextran(FD-40)concentration,bacterial translocation rate(MLN,liver,spleen),levels of IL-6 and TNF-α were significantly increased,the levels of IL-10,Wnt,β-catenin,and the fluorescence densities and protein levels of claudin-1 and occludin were significantly decreased;compared with rats in SBS group,the FD-40 concentration,bacterial translocation rate(MLN,liver,spleen),levels of IL-6 and TNF-α in PSG-1 low,middle and high dose groups were significantly reduced,the villus length,recess depth,the levels of IL-10,Wnt,β-catenin,and the fluorescence densities and protein levels of claudin-1 and occludin were significantly increased.Conclusion PSG-1 may reduce inflammatory reaction and intestinal permeability and improve intestinal barrier dysfunction by activating the expression of Wnt/β-catenin pathway protein in SBS rats.

Objective:To construct a chain mediating model based on two mediating variables of positive psychological capital and general self-efficacy, so as to explore the impact mechanism of social support on posttraumatic growth in thyroid cancer patients.Methods:From March to December 2023, convenience sampling was used to select 270 postoperative patients with thyroid cancer from the Chinese People's Liberation Army General Hospital as participants. The patients were surveyed using the General Information Questionnaire, Post Traumatic Growth Inventory, Social Support Rating Scale, Positive Psychological Questionnaire, and General Self-efficacy Scale. Spearman correlation was used to analyze the correlation between social support, positive psychological capital, general self-efficacy, and posttraumatic growth in thyroid cancer patients. SPSS PROCESS program was used to test for the chain mediating effect.Results:A total of 270 questionnaires were distributed, and 257 questionnaires were collected. After excluding questionnaires with missing items exceeding 10% and regular responses, 246 valid questionnaires were collected, with a valid response rate of 91.11% (246/270). Spearman correlation showed that there was positive correlations between social support, positive psychological capital, general self-efficacy, and posttraumatic growth in patients ( P<0.01). Mediating effect analysis showed that social support directly and positively predicted posttraumatic growth in thyroid cancer [ β=0.403, 95% CI (0.258, 0.547) ], and also affected patients' posttraumatic growth through three indirect pathways, namely social support → positive psychological capital → posttraumatic growth, with an effect value of 0.083 [95% CI (0.002, 0.173) ], accounting for 13.63% of the total effect, and social support → general self-efficacy → posttraumatic growth, with an effect value of 0.099 [95% CI (0.040, 0.166) ], accounting for 16.26% of the total effect, and social support → positive psychological capital → general self-efficacy → posttraumatic growth, with an effect value of 0.025 [95% CI (0.005, 0.051) ], accounting for 4.11% of the total effect. The total indirect effect accounted for 33.83% of the total effect. Conclusions:Social support can not only directly affect the post-traumatic growth of thyroid cancer patients, but also indirectly affect post-traumatic growth through the mediating effect of positive psychological capital and general self-efficacy.

Objective To explore whether voluntary wheel running affects liver oxidative stress by regulating the Nrf2/HO-1 pathway,thereby alleviating HFFC diet-related lipid deposition in the liver.Methods Eight-week-old C57BL/6J mice were randomly divided into a normal diet group(NC group,n=10)and high-fat,fructose,and cholesterol diet group(HFFC group,n=20)after 1 week of adaptive feeding.Ten weeks of feeding later,mice in the HFFC group were divided into a quiet group(HFFC group,n=10)and HFFC combined with exercise group(HFFC+EX group,n=10).HFFC+EX group mice were caged with voluntary running wheels for free movement,and the number of running wheels was recorded every day for 8 weeks.After the last treatment,the mice were sacrificed by fasting for 12 hours at an interval of 24 hours,and the blood and liver were collected for analysis.Results(1)Body weight,liver weight,and liver index of mice fed the HFFC diet were significantly higher than those of the NC group,which significantly decreased after exercise(P＜0.05).(2)Compared with the NC group,HDL-C and LDL-C in the HFFC group were significantly increased,and the LDL-C level was significantly decreased after 8 weeks of exercise(P＜0.05).(3)The liver fat droplet area and liver TG content in the HFFC group were significantly higher than those in the NC group,whereas those in HFFC+EX group were significantly decreased(P＜0.05).(4)Compared with the NC group,the content of oxidase MDA in the HFFC group were significantly increased,and nuclear translocation and gene expression of Nrf2 were significantly decreased.After exercise,the activities of SOD and T-AOC were significantly increased,and the nuclear translocation and gene expression of Nrf2 and expression levels of HO-1 and SOD-1 were significantly increased(P＜0.05).(5)The number of apoptotic hepatocytes and CHOP expression in the HFFC diet group were significantly higher than those in the NC group,whereas the number of apoptotic hepatocytes,and CHOP and Bax/Bcl-2 expression in the exercise group were significantly lower than those in the NC group(P＜0.05).Conclusions Voluntary wheel can alleviate HFFC diet induced liver lipid deposition by regulating the Nrf2/HO-1 pathway,thereby alleviating oxidative stress and reducing apoptosis in liver cells.

Objective To evaluate the quality of ultrafine powder of Spatholobus suberectus from different sources by combined HPLC fingerprint and chemical pattern recognition.Methods Separation was performed on a Amethyst C18-H column(4.6 mmx250 mm,5 pm)and the mobile phase was 0.1％phosphoric acid-acetonitrile with gradient elution.The flow rate was 1.0 mL/min and the wavelength was 260 nm.The column temperature was 30 ℃.The cluster analysis(CA),least partial squares-discriminant analysis(PLS-DA)and principal component analysis(PCA)were applied to studying the HPLC fingerprint and chemical pattern recognition.Results Thirteen common peaks were identified in ultrafine powder samples of 10 batches of Spatholobus suberectus and 3 components were identified by reference substances.The similarity of fingerprint was 0.921-0.989,indicating good similarity.The samples were divided into 3 groups by cluster analysis;principal component analysis results extracted 4 principal components.According to the composite score,the quality of ultrafine powder samples of Spatholobus suberectus from S6,S1,S2,S3 were better than others.And 4 kinds of marker compounds that caused the quality difference of ultrafine powder samples of Spatholobus suberectu were screened out through the least partial squares-discriminant analysis,which were epicatechin and peaks 1,6 and 4 respectively.Conclusion The fingerprint method is simple and reproducible,and can be used to evaluate the quality of ultrafine powder samples of Spatholobus suberectus in combination with multi-mode stoichiometric analysis.

Background::Influenza and pneumococcal vaccination are a priority in patients with chronic obstructive pulmonary disease (COPD). However, limited information is available on vaccination coverage among patients with acute exacerbations of COPD (AECOPD) in China. This study aimed to determine the rates and associated factors of influenza and pneumococcal vaccination in patients hospitalized with AECOPD.Methods::Baseline data from a national, multicenter, hospital-based study that included adult inpatients with AECOPD between 2017 and 2021 were analyzed. The outcomes of interest were the influenza vaccination in the past year and the pneumococcal vaccination in the past 5 years. To ensure national representativeness, rates were weighted according to the distribution of hospital levels and types enrolled in this study. Multivariable Poisson regression based on mixed-effects models were used to determine the associated factors. The independent variables included the region and hospital features where the participants were located, sociodemographic characteristics (age, sex, rural/urban residence, education, etc.), and clinical indicators (COPD disease history, lung function parameters, comorbidities, etc.). The treatment profiles of the vaccinated and unvaccinated participants were compared.Results::Of 6949 eligible participants, the weighted rates of influenza/pneumococcal, influenza, and pneumococcal vaccination were 2.72% (95% confidence interval [CI]: 2.34%-3.10%), 2.09% (95% CI: 1.76%-2.43%), and 1.25% (95% CI: 0.99%-1.51%), respectively. In multivariable models, age ≥60 years (60-69 years, odds ratio [OR]: 1.90, 95% CI: 1.11-3.25; ≥80 years, OR: 2.00, 95% CI: 1.06-3.78), geographical regions (Northern China relative to Eastern China, OR: 5.09, 95% CI: 1.96-13.21), urban residence (OR: 1.69, 95% CI: 1.07-2.66), a higher education level (junior high school, OR: 1.77, 95% CI: 1.21-2.58; senior high school or above, OR: 2.61, 95% CI: 1.69-4.03), former smoking (OR: 1.79, 95% CI: 1.15-2.79), and regular inhaled medication treatment (OR: 3.28, 95% CI: 2.29-4.70) were positively associated with vaccination. Patients who had experienced severe exacerbations in the past year were less likely to be vaccinated (OR: 0.65, 95% CI: 0.45-0.96). Compared with unvaccinated participants, vaccinated participants adhered better to pharmacological and non-pharmacological treatment.Conclusions::Influenza and pneumococcal vaccination coverage are extremely low. Urgent measures are necessary to increase vaccination coverage among inpatients with AECOPD in China.