Acetates ; urine ; Chromatography, Gas ; Gas Chromatography-Mass Spectrometry ; Humans

BACKGROUND: Chondroitin sulfate is the important component of cell matrix, it can accelerate the proliferation of tumor cells and restrain its ransfer.OBJECTIVE: To observe the effects of chondroitin sulfate on the proliferation and differentiation of HL60 cells under the action of adriamycin.DESIGN: An open experiment.SETTING: Department of Biochemistry and Molecular Biology, Medical College of Qingdao University.MATERIALS: The experiments were carried out in the Research Room of Biochemistry and Molecular Biology, Medical College of Qingdao University of September 2003 to December 2004. Experimental materials and reagents: HL60 cell strains, which were the cells from promylocytic leukemia, were purchased from Shanghai Cell Bank, Chinese Academy of Medical Sciences; Bovine cartilage chondroitin sulfate (Sigma) was also used.METHODS: ① After the passage and culture, the cells at the logarithmic proliferative phase were dispensed into cell suspension of 1×108 L-1 with RPMI1640 culture medium containing inactivated fetal bovine serum of 0.1in volume fraction, and then filled into the culture bottles with 4 mL in each bottle for a total of 45 bottles. ② Chondroitin sulfate was added to 15 bottles filled with cell suspension according to the concentrations of 0, 5,25, 50 and 75 mg/L respectively, and 3 bottles for each concentration, and 0.01 mol/L phosphate buffer (pH7.2) was added in the blank control group. Then the density of HL60 cells was determined by cell counting after treatment of chondroitin sulfate. ③ Thirty bottles filled with cell suspension were divided into chondroitin sulfate+adriamycin group and chondroitin sulfate group, 15 bottles in each group. Chondroitin sulfate of 0, 5,25, 50 and 75 mg/L was added to the two groups, and 3 bottles for each concentration, and 0.01 mol/L phosphate buffer (pH7.2) wass adokd in the blank control group. Then the survival rate of chondroitin sulfate treated HL60 was detected after adding adriamycin. ④ Chondroitin sulfate was added to 15 bottles filled with cell suspension according to the concentrations of 0, 5, 25, 50 and 75 mg/L respectively, and 3 bottles for each concentration, 0.01 mol/L phosphate buffer (pH7.2) was added in the blank control group. The activity of acid phosphatase was detected with enzymelinked immunosorbant assay (ELISA) in each group, and the effect of the cell differentiation was observed.MAIN OUTCOME MEASURES: ① Effects of chondroitin sulfate on the proliferation of HL60 cells; ② Effects of chondroitin sulfate plus adriamycin on the survival rate of HL60 cells; ③ Effect of chondroitin sulfate on the activity of acid phosphatase of HL60 cells.RESULTS: Totally 45 bottles of cell suspension were prepared, and all were involved in the analysis of results. ① As compared with the blank control group, the densities of HL60 cells at 24 hours after treated with chondroitin sulfate of different concentrations were all significantly increased (P ＜ 0.01), which were increased more obviously in the 50 and 75 mg/L chondroitin sulfate treated groups, and there was no significant difference between the two groups (P ＞ 0.05), which indicated that chondroitin sulfate within the range of concentration did not accelerate the growth of cells greatly. ② As compared with the blank control group, the survival rates of HL60 cells in the chondroitin sulfate+adriamycin groups were decreased to different extents after chondroitin sulfate of different concentrations were added, and it decreased obviously when the concentration of chondroitin sulfate was higher than 25 mg/L (P ＜ 0.01). ③ As compared with the blank control group, the A values of acid phosphatase of the HHL60 cells were all obviously increased in the 5, 25 and 50 mL chondroitin sulfate treated groups (1.268±0.038, 1.305±0.101, 1.321±0.021,1.354±0.013, P ＜ 0.01 or 0.05), especially that it reached 1.406±0.113 in the 75 mL chondroitin sulfate treated group, which was extremely and significantly different from that in the blank control group (P ＜ 0.001).CONCLUSION: Chondroitin sulfate with a proper concentration can accelerate the proliferation of HL60 cells, and it can increase the sensibility of HL60 cells to adriamycin, and promote the differentiation of HL-60 cells.

Objective To investigate clinical presentations,laboratory examinations,magnetic resonance imaging (MRI) appearances and treatment of hypertrophic cranial pachymeningitis (HCP).Methods The clinical data of 13 patients with HCP receiving comprehensive therapy in Huashan Hospital from January 2007 to January 2013 were analyzed retrospectively.Results The onset of HCP was mostly chronic with an average duration of 26.7 months.The main clinical manifestations of the 13 patients were chronic headaches (12/13) and cranial nerve paralysis (12/13).Inflammation markers and cerebro-spinal fluid (CSF) protein levels increased in patients with HCP and gradually became normal after the treatment.The MRI demonstrated local or diffused thickened dura located in tentorium (10/13),falx cerebrum (5/13),frontal lobe (4/13),temporal lobe (7/13) and parietal lobe (4/13).The signal intensity was isointense on T1-weighted MR images and hypointense on T2-weighted MR images.Enhanced MR images showed conspicuous enhancement of the dural edges.Corticosteroid therapy improved the clinical symptoms in 12 of 13 patients.Conclusions HCP typically causes headache and paralysis of multiple cranial nerves.Enhanced MRI shows characteristic manifestations.At present corticosteroid therapy is the treatment of choice followed by immunosuppressive agent and radiotherapy.

Calibration ; Chemistry Techniques, Analytical ; methods ; Humans ; Lead ; blood

Objective To explore the relationship between serum high mobility group protein B1(HMGB1)level and anxiety symptoms in patients with cerebral small vessel disease(CSVD).Methods A total of 165 CSVD patients admitted in our department from December 2022 to July 2023 were enrolled as the research subjects.All of them were evaluated by neurologists with Hamilton Anxiety Rating Scale(HAMA),and then those with HAMA score ≥7 were assigned into an anxiety group(70 cases),and the other into a non-anxiety group(95 cases).Non paramet-ric rank sum test was used to compare the serum level of HMGB1 between the two groups of pa-tients.Logistic regression analysis was employed to analyze the risk factors affecting anxiety symptoms in CSVD patients.ROC curve was plotted to evaluate the predictive value of HMGB1 for anxiety symptoms in the patients.Results The serum HMGB1 level was significantly higher in the anxiety group than the non-anxiety group[287.01(188.19,355.54)ng/L vs 260.87(146.48,328.16)ng/L,P＜0.05].Multivariate logistic regression analysis showed that after adjusting for confounding factors,serum HMGB1 level was still a risk factor for anxiety symptoms in CSVD patients(OR=1.004,95％CI:1.000-1.007,P=0.046).Spearman correlation analysis indicated that HMGB1 level was positively correlated with total score of HAMA,insomnia score,and psy-chogenic score(P＜0.05,P＜0.01).The AUC value of HMGB1 in predicting anxiety symptoms in CSVD patients was 0.609(P=0.020).Conclusion Serum HMGB1 level is associated with the oc-currence of anxiety symptoms in CSVD patients,and it has predictive value for the anxiety symp-toms in CSVD patients.

Objective:To explore the feasibility of soft copy image of chest digital radiography (DR SC) in pneumoconiosis diagnosis by observing the reading effect of DR SC and comparing it with high kV film-screen chest radiography (FSR HkV) . To provide a basis for the establishment of a regional information network platform for pneumoconiosis diagnosis. Methods:A total of 119 miners who were exposed to silica dust and engaged in copper or lead-zinc mining were collected by the Third People's Hospital of Yunnan from October 2017 to August 2019. The pulmonary X-ray findings of DRSC and FSR HkV in each case were independently judged and diagnosed by three experienced diagnostic physicians, and the final decision was made according to the consensus of most doctors. The consistency of the two imaging methods was analyzed by observing the main small opacity shape, the overall density, the range of distribution, the aggregation of the small opacity and the big opacity, and the diagnosis stage. Results:there were 118 males and 1 female with an average age of 46.21 years. Average exposure time 7.38 years. The pulmonary X-ray findings of 113 cases with two imaging methods were mainly the round small opacity of p,q and r,but the reticular irregular opacity were not prominent, Only one case of FSR HkV judgment p shape and DR SC judgment q shape were observed, The coincidence rate was 99.12% (112/113) . huger opacity were observed in the other 6 cases. The coincidence rate was 95.51% (4/89) between pneumoconiosis-free and stageⅠ, and there was no significant difference between stageⅡand stage Ⅲ (30/30, P>0.05) . Conclusion:The x-ray findings of Silicosis with small round shadow in lung can be used by DR SC in diagnosis and staging.

Objective:To investigate the development of hypertension specialty and chronic disease management of county-level hospitals in China, for reference in improving the standardized chronic disease management level of hypertension in the counties.Methods:From September to November 2020, a questionnaire survey on 597 county-level hospitals in 24 provinces was conducted on a voluntary basis. The survey covered such areas as the setup of hypertension specialty, team building of professionals and the management regulations of chronic hypertension of the hospital. The survey data were analyzed by descriptive statistics.Results:Among the 597 county-level hospitals, 54(13.5%) hospitals had independent hypertension departments, 147(24.6%) had hypertension clinics, and 143(24.0%) hospitals had hypertension beds. 431(72.2%) hospitals had hypertension diagnosis and treatment process in outpatient clinics, 454(76.0%) hospitals had hypertension diagnosis and treatment process in wards, and 535(89.6%) hospitals had graded diagnosis and treatment process of hypertension. 473(79.2%) hospitals had established county medical alliance as the lead unit, including 167 compact medical alliances. 97.7% of the hospitals were equipped with basic hypertension risk stratification screening items, and 63.8% could carry out primary screening of secondary hypertension.Conclusions:The pattern of chronic diseases management of hypertension in county-level medical institutions has basically taken shape, but there is still room for improvement. In the future, we should focus on the construction of professional teams of hypertension, the standardized management of diagnosis and treatment of hypertension, and a smoother path of tiered medical service, so as to increase the health management level of hypertension in China.

Objective:To report the sampling study design and radiography protocol of a large-sample investigation on skeletal maturation of 3 to 18-year-old children in China.Methods:Multi-stage stratified random sampling was employed in this study. Two provinces, municipalities, or autonomous regions were randomly selected from each of the seven regions of China, including Northeast China, Northwest China, North China, Central China, East China, Southwest China, and South China. Then one rural and one urban investigation site were randomly selected from each province, municipality, or autonomous region. In total 28 sites were included. Among those sites, four residential districts were randomly selected from each urban site, and four townships from each rural site. For each residential district or township, 1-4 kindergartens, primary schools, and middle schools were chosen. Random cluster sampling was used to extract 3-<6-year-old children in kindergartens, and 6-18-year-old children in primary schools and middle schools. The investigation on skeletal maturation was sampled proportionate to the sampling of the whole study. The estimated simple size was 780 for each site, and 21 840 for all 28 sites in total. There were six groups of 3-<6-year-old children classified at 0.5-year intervals, and 12 groups of 6-18-year-old children classified at 1-year intervals. Posteroanterior position radiography of the left hand and wrist was achieved for all subjects.Results:The study was performed from August 26, 2019 to October 16, 2021. In total, 20 444 children received posteroanterior position radiography of the left hand and wrist, including 10 196 males and 10 248 females, 9 711 urban and 10 733 rural, respectively. The 3-<6-year-old group included 1 611 (male 819, female 792) subjects, and the 6 to 18-year-old group included 18 833 (male 9 377, female 9 456) subjects.Conclusion:This nationwide investigation on skeletal maturation of 3 to 18-year-old children in seven regions of China was successfully preformed. The results of this study can provide an important reference for establishing the current evaluation criteria of bone age in Chinese children and adolescents.

Objective:To evaluate the applicability of bone age (BA) assessment methods and to investigate the difference between BA and chronological age (CA) based on the data of children in rural areas of Beijing.Methods:A total of 412 healthy children (226 boys, 186 girls) with the age 8.6 (6.8, 10.3) years old were included in this study. The data of the prospective study were from a subgroup of the project "National Nutrition and Health Systematic Survey for 0-18 Years Old Children in China", which included children with age of 3-12 years old in Beijing rural areas. The non-dominant hand-wrist radiographs of all participants were obtained in April 2021. The Dr.Wise BA detection and analysis system was used to assess the BA according to the Tanner Whitehouse 3 (TW3) radius-ulna-short bone score (TW3-RUS), TW3 carpal bone score (TW3-Carpal), China-05 TW3-Chinese RUS (TW3-C RUS), China-05 TW3-Chinese carpal (TW3-C Carpal), and Greulich-Pyle (G-P) standards. The cases were stratified by the sex and different CA in the statistical analysis. The estimated BA obtained using different methods were compared with the CA using Wilcoxon signed ranks test.Results:The sex-stratified results showed that no significant difference was found between the estimated BA using G-P standards and CA in boys ( Z=-0.694, P=0.488), while all the other estimated BA results were statistically significantly higher than CA ( P<0.05). Stratified by both sex and CA, the estimated BA using G-P standards in 4-6 years old boy groups, as well as the estimated BA using TW3-Carpal and TW3-C Carpal standards in 11-12 years old girl groups were lower than CA, while in the other groups, the estimated BA were higher than CA. Conclusions:There were varying degrees of deviations in the BA estimations using TW3, China 05, and G-P methods for children in rural areas of Beijing. It is imperative to establish a new standard for the BA evaluation of the contemporary Chinese children.

Objective:To evaluate the incidence of arrhythmias and electrocardiographic (ECG) characteristics in cancer patients treated with immune checkpoint inhibitors (ICIs).Methods:This was a cohort study conducted in the Fourth Hospital of Hebei Medical University. Cancer patients initiating ICIs treatments from November 2020 to September 2022 were included in this study. Baseline 12-leads ECG before ICIs initiation and post-treatment ECG were analyzed. An abnormal ECG was defined as the presence of any of the following changes: sinus arrhythmias, atrial fibrillation, atrial flutter, paroxysmal supraventricular tachycardia, ventricular tachycardia, premature contractions, conduction disorder, and ST-T changes.Results:A total of 87 patients were enrolled, aged 63 (57, 68) years, with 66 (75.9%) males. And 44.8% (39/87) of patients presented with at least one confirmed cardiovascular disease or cardiovascular risk factor at baseline. The incidence of abnormal ECG increased from 31.0% (27/87) at baseline to 65.5% (57/87) after receiving (5.0±2.7) cycles of ICIs treatment ( P<0.001). The incidence of sinus arrhythmias was significantly increased after ICIs treatment (23.0% (20/87) vs. 9.2% (8/87), P=0.023), of which only the incidence of sinus tachycardia was significantly increased (11.5% (10/87) vs. 2.3% (2/87), P=0.039). There was also a significantly increased incidence of ST-T changes after ICIs treatment (31.0% (27/87) vs. 17.2% (15/87), P=0.012), which mainly attributed to the T wave changes (29.9% (26/87) vs. 13.8% (12/87), P=0.001). The incidence of premature contractions was also significantly increased after ICIs treatment (9.2% (8/87) vs. 0, P=0.008). Additionally, compared with baseline, the P wave axis was significantly increased after ICIs treatment ((56.94±21.01)° vs. (52.00±22.69)°, P=0.043). After ICIs treatment, the heart rate was significantly increased ((79.07±15.37) beats/min vs. (75.64±13.37) beats/min, P=0.029). Sokolow-Lyon index ((2.21±0.81)mV vs. (2.33±0.75)mV, P=0.138), QTc interval ((431.44±36.04)ms vs. (428.00±30.05)ms, P=0.415) all showed signs of change after treatment, but did not reach the traditional significant level. Conclusions:The incidence of abnormal ECG is significantly increased after ICIs treatment, especially for sinus tachycardia, premature contractions and T wave changes; the P wave axis and heart rate is also significantly increased after treatment. It is important to perform regular ECG monitoring in patients receiving ICIs treatment.