Objective To investigate and analyze the risk factors of cardiovascular events by low density lipoprotein cholesterol (LDL-C). Methods A total of 430 patients with stable angina pectoris (SAP) in the hospital were included from June 2021 to June 2024 for retrospective analysis. According to whether acute myocardial infarction (AMI) occurred, the enrolled patients were divided into stable group (n=257) and deteriorating group (n=173). The general data were compared between groups, and the risk factors affecting AMI in SAP patients were analyzed. The predictive value of the above risk factors on predicting AMI in SAP patients was analyzed. Results Compared with the stable group, the levels of LDL-C, TG, LP-a and Hcy in the deteriorating group were higher (t=4.033, P<0.001; t=4.104, P<0.001; t=6.342, P<0.001; t=4.883, P<0.001) while the HDL-C level was lower (t=5.129, P<0.001). Multivariate logistic regression analysis suggested that the elevated levels of LDL-C, TG, LP-a and Hcy were the risk factors of AMI in SAP patients (P<0.05), and the elevated level of HDL-C was a protective factor (P<0.05). In the ROC curve, the area under the curve (AUC), sensitivity and specificity of combination of LDL-C, HDL-C, TG, LP-a and Hcy in predicting AMI in SAP patients were 0.777, 63.01% and 81.71%. Conclusion LDL-C is a risk factor of AMI in SAP patients. Combination of HDL-C, TG, LP-a and Hcy has certain value on predicting AMI in SAP patients.

Objective:To explore the latent profile types of capability-opportunity-motivation-behavior in stroke patients and analyze the influencing factors of different latent profiles.Methods:From January to October 2023, totally 596 stroke patients from the Neurology Department of five ClassⅢ Grade A hospitals in Henan Province were selected by stratified random sampling. The patients were surveyed using a general information questionnaire, the Stroke Prevention Knowledge Questionnaire (SPKQ), the Social Support Rating Scale (SSRS), the WHO's Quality of Life Questionnaire- Brief Version (WHOQOL-BREF), the Short Form Health Belief Model Scale (SF-HBMS), and the Health Promoting Lifestyle ProfileⅡ (HPLPⅡ). Latent profile analysis was used to classify the capability-opportunity-motivation-behavior characteristics of stroke patients, and multiple logistic regression was conducted to explore the influencing factors of different latent profiles.Results:Three latent profiles of capability-opportunity-motivation-behavior in stroke patients were identified, including low capability-opportunity-motivation-behavior with high health beliefs (32.4%, 193/596), moderate capability-opportunity-motivation-behavior with insufficient health beliefs (47.5%, 283/596), and high capability-opportunity-motivation-behavior with lack of social support (20.1%, 120/596). Multiple logistic regression analysis showed that educational level, smoking history, family history, body mass index, and Charlson Comorbidity Index score were influencing factors of different latent profiles ( P<0.05) . Conclusions:Stroke patients exhibit distinct classifications of capability-opportunity-motivation-behavior. Targeted interventions should be conducted based on the characteristics of each category to improve health behavior management outcomes in patients.

Objective:To investigate the stability of α-synuclein (α-Syn) aggregates formed by incubation with blood plasma of patients with Parkinson's disease (PD).Methods:Peripheral blood samples were collected from 10 patients diagnosed as having PD in our hospital from June 2020 to December 2020 and 10 healthy control subjects (HC) at the same time period. The 1 mg recombinant human α-Syn was dissolved in 140 μL 0.01 mol/L phosphate buffer solution (PBS), and then, incubated with plasma from HC and PD patients and PBS at 37 ℃ for 7 d (HC group, PD group and PBS group). Preformed fiber (PFF) group was used for subsequent experiment with 10 μg PFF. After digestion with different concentrations of trypsin (concentration ratios of trypsin/α-Syn=1:80, 1:40, and 1:20) and protease K (PK, 1.0, 1.5, and 2.0 μg/mL), the differences of α-Syn levels before and after digestion were detected by Western blotting.Results:(1) Effect of trypsin on PFF digestion: PFF gradually decreased with the increase of trypsin doses; when trypsin/α-Syn ratio=1:20, α-Syn aggregates with molecular weight greater than 35 000 were almost completely digested, and its digestion was significantly different as compared with that in other concentration ratios ( P<0.05). (2) Effect of trypsin on digestion of α-Syn aggregates: at the relative molecular weight<25 000, when the concentration ratio of trypsin/α-Syn=1:20, as compared with HC and PD groups, the PBS group had significantly more obvious decrease ( P<0.05). At the relative molecular weight 35 000-40 000, the α-Syn levels in PBS, HC and PD groups were significantly decreased as compared with those before digestion at all concentration ratios; as compared with HC and PD groups, the PBS group had significantly more obvious decrease ( P<0.05). At molecular weight>40 000, α-Syn decreased significantly in PD group only when the concentration ratio of trypsin/α-Syn=1:20, and the degrees of digestion was PBS group>HC group>PD group, with significant differences among groups ( P<0.05). (3) Effect of PK on PFF digestion: when PK concentration was 1.0, 1.5 or 2.0 μg/mL, α-Syn was basically digested at relative molecular weight>35 000, and α-Syn monomer was reduced and small fragment appeared at relative molecular weight<25 000; as compared with negative controls (0 μg/mL PK), these changes in groups of PK concentration of 1.0, 1.5 or 2.0 μg/mL were significantly different ( P<0.05). (4) Effect of PK on digestion of α-Syn aggregates: at relative molecular weight<25 000, α-Syn in PBS group was digested into smaller fragments while α-Syn in HC and PD groups was not digested; significant differences was noted among groups at the same concentration ( P<0.05). At relative molecular weight of 35 000-40 000, with the increase of PK concentration, the amount of α-Syn dimer in PBS group decreased (increased digestibility), that in HC group increased, however, that in PD group did not change obviously; significant difference was noted at the same concentration among the three groups ( P<0.05). At relative molecular weight>40 000, with the increase of PK concentration, α-Syn in PBS, HC and PD groups decreased to a certain extent, and significant difference was noted among groups at the same concentration ( P<0.05). Conclusion:The stability of α-Syn aggregates formed by incubation with plasma from PD patients is higher than that formed by incubation with HC plasma and PBS.

Objective:To investigate the level of serum vascular endothelial growth factor (VEGF) and its correlation with clinical symptoms in patients with first-episode drug-naive schizophrenia patients of different genders.Methods:From January 2016 to October 2019, a total of 81 first-episode drug-naive schizophrenia patients(patient group, 41 male, 40 female) and 64 healthy controls (control group, 40 male, 24 female) were included in this study.The serum level of VEGF was detected with flow cytometric bear array (CBA). Positive and negative symptom scale (PANSS) was used to evaluate the relevant clinical symptoms of patients.SPSS 22.0 software was used for statistical analysis.Independent sample t-test and nonparametric test were used for comparison between groups.The relationship between VEGF and clinical variables was analyzed by Pearson correlation analysis and Spearman correlation analysis. Results:The level of serum VEGF in the patient group was significantly lower than that in the control group(148.08(75.89, 208.61)pg/mL, 179.94(99.14, 318.41)pg/mL, Z=-2.20, P=0.028). The total PANSS score((82.71±17.30), (73.45±16.36), t=2.473, P=0.016)and cognitive score((7.88±3.36), (6.23±2.81), t=2.402, P=0.019) in male patients were higher than those in female patients.There was a negative correlation between VEGF level and PANSS negative symptom score in the patient group( r=-0.228, P=0.041), as well as significant negtive correlation between VEGF level and cognitive score in male patients( r=-0.425, P=0.007). Conclusion:The level of serum VEGF is reduced in first-episode patients with schizophrenia, which influences their negative symptom. Moreover, the decline in serum VEGF level is implicated in cognitive impairments in male patients with first-episode schizophrenia.

Tyrosine-decahydrofluorene derivatives feature a fused [6.5.6] tricarbocyclic core and a 13-membered

【Objective】 To investigate the unqualified rate of anti-HIV detection of blood screening laboratories in Beijing-Tianjin-Hebei region, and explore the differences in anti-HIV detection ability and influencing factors in each laboratory. 【Methods】 Through filling questionnaires via e-mail, the anti-HIV ELISA unqualified rate and confirmed (WB) positive results (data) from January to December 2018 from 15 blood screening laboratories in Beijing-Tianjin-Hebei region were collected. Our laboratory was responsible for data collection and confirmation, and statistics software SPSS22.0 was used for analysis. 【Results】 1) There was a statistically significant difference among the unqualified rate of anti-HIV ELISA(6.77‱~35.71‱) and confirmed positive rate(0.60‱~3.56‱) in 15 blood screening laboratories in Beijing-Tianjin-Hebei region (P<0.05); 2) There were significant differencse among the ELISA unqualified rate and the confirmed positive rate of 8 reagents for anti-HIV detection(P<0.01), and the sensitivity of the 4th generation detection reagent and the imported reagent was higher than that of the 3rd generation reagent and the domestic reagent. The anti-HIV ELISA unqualified rate of R5 was the highest (19.08‱). 3)There were significant differences in the anti-HIV ELISA unqualified rate of R1, R2, R3, R5 and R7 reagents among different blood station laboratories(P<0.05), and there were no significant differences in the anti-HIV ELISA unqualified rate of R4, R6 and R8 reagents among different blood station laboratories(P>0.05). 4)The unqualified rate of anti-HIV ELISA of laboratories using different regents showed significant differences(P<0.05), except H, J, M. The unqualified rate of imported reagent was significantly higher than that of domestic reagents of laboratories using imported and domestic reagents combinations(P<0.05), except O. 62.5% (5/8) laboratories using domestic 3^rd and 4^th generation reagent combination showed significant differences in the unqualified rates among different reagents(P<0.05); 5) The positive rate of single-reagent(62.02%~95.45%)in 15 blood screening laboratories showed significant difference(P<0.001), and A was the lowest (62.02%). 【Conclusion】 The anti-HIV detection ability among 15 blood screening laboratories in Beijing-Tianjin-Hebei region is quite different. The application of different reagents is the main factor for the difference, and other factors such as personnel, instruments and test strategies also has a great impact on the detection of anti-HIV. It is still necessary to promote the process of homogenization of blood testing quality among blood screening laboratories in Beijing-Tianjin-Hebei region.

Objective To investigate the effect of intraoperative dripping of intravenous tranexamic acid (TXA) on the perioperative blood loss in elderly patients undergoing hip arthroplasty for femoral neck fracture.Methods From January 2016 to August 2017,118 elderly patients with femoral neck fracture were treated with hip arthroplasty at Department of Orthopaedics,China-Japan Friendship Hospital.They were 45 males and 73 females,with an average age of 77.1 years.Of them,60 (TXA group) were subjected to intravenous TXA dripping over 10 minutes by 2 doses (15 mg/kg TXA dissolved in 100 mL of saline) with the first dose before incision and the second one at wound closure;58 (control group) were subjected to intravenous administration of 100 mL of saline solution in a similar fashion.Blood routine tests were carried out one day before operation,and the first and third days after operation.The transfusion rate and volume,and surgical blood loss were recorded.The total blood loss on postoperative 1-day and 3-day were calculated according to hemoglobin balance method.The 2 groups were compared in terms of blood loss and complications.Results The blood transfusion rate (21.7％),blood transfusion volume (310.8 ± 85.7 mL),surgical blood loss (424.3 ± 87.6 mL),total blood loss on postoperative 1-day (1,284.6 ±288.7 mL) and total blood loss on postoperative 3-day (1,501.2 ± 337.1 mL) in the TXA group were all significantly lower than those in the control group (41.4％,379.8 ± 110.2 mL,526.7 ± 113.8 mL,1,534.8 ± 279.2 mL and 1,887.4 ± 431.8 mL,respectively) (P ＜ 0.05).There was no significant difference between the 2 groups in postoperative complications (P ＞ 0.05).Conclusion In elderly patients undergoing hip arthroplasty for femoral neck fracture,intravenous TXA administration may lower transfusion rate,reduce transfusion volume,and decrease surgical blood loss and postoperative total blood loss without increasing the risks of surgery-related complications like thrombosis.

Objective To investigate the role of neuroglobin ( NGB) in oxygen-glucose deprivation and reoxygenation ( OGD/R ) induced mitochondrial depolarization and reactive oxygen species ( ROS ) production in a human neuroblastoma cell line (SH-SY5Y).Methods SH-SY5Y cells were transfected with lentivirus to establish a stable cell line of NGB knockdown ( KD).After treated with OGD/R, cells were collected at different time points to analyze NGB mRNA and protein levels.Furthermore, cells were stained with JC-1 and DCFH-DA to evaluate mitochondrial depolarization and ROS production by inverted fluorescence microscope.Also, to determine the neurotoxicity , we measured the lactate dehydrogenase ( LDH) level in the cell culture medium.Results After the treatment of OGD/R, the NGB mRNA and protein started to elevate and peak at 4 h and 8 h (2.04 ±0.35 fold,1.69 ±0.18 fold).Compared with the vector group , NGB KD group had much more mitochondrial depolarization [ JC-1 red/green ( 1.10 ±0.10 ) vs (1.46 ±0.11),P<0.05] and ROS production [DCFH-DA fluorescence (36.30 ±5.32) vs (16.26 ± 2.97),P<0.05].Furthermore, NGB KD groups had a higher level of LDH release [(63.42 ±6.14)%vs (49.65 ±5.09 )%, P <0.05 ].Conclusions NGB plays an important role in the homeostasis of mitochondria.Knockdown of NGB results in increased mitochondrial depolarization , ROS production and neurotoxicity under hypoxia circumstances.

The adverse reactions caused by traditional Chinese medicine have occurred frequently, but there is a lack of scientific,objective and standardized methods for safety evaluation of traditional Chinese medicine.In the process of preclinical evaluation of traditional Chinese medicine, it is imperative to form a set of scientific, standardized and feasible evaluation system of modem Chinese herbal drug.We established the preclinical safety evaluation system of modem Chinese herbal drug including the quality control system of samples for the preclinical safety evaluation, the toxicity evaluation system of modem Chinese herbal drug and its preparation and the evaluation management system, and standardized each research link of preclinical evaluation of traditional Chinese medicine.Whether from protecting patients' health and increasing the safety of clinical medication, or from enriching and improving traditional Chinese medicine science, developing traditional Chinese medicine and promoting mutual connection of traditional Chinese medicine and international medicine, it has important instructional significance and application value.