The binding capacity (R_o) and apparant dissociation constant (K_d) of glucocrticoid binding sites in hepatic cytosol of normal and scalded rats were measured by pseudoscatchard analysis. Compared with control group, the levels of Ro of glucocorticoid receptor was significantly decreased 1 h after scalding, partialy recovered at 12h after scalding and fully recovered at 24 h after scalding. The levels of low-affinity glucocorticoid binding sites were also decreased 12 h after scalding, but had no statistical significance. The possible significance of these results has been discussed.

Scatchard, pseudoscatchard and competitive analyses showed that there were two glucocorticoid (GC) binding sites in rat hepatic cytosol: high-affinity glucocorticoid binding sites (HAGS) and low-affinity glucocorticoid binding sites (LAGS). Pseudoscatchard analysis showed the dissociation constant (Kd) of LAGS was 4.1+1.4umol/L (n=4). The inactivation of LAGS in vitro was slower" than that of HAGS. LAGS and HAGS could not be separated by DEAE-cellulose chfomatography. HAGS were saturable and had steroid specificity for glucocorticoid just as the classic glucocorticoid receptor. Triamcinolone acetonide, RU486 and RU26988 competed equally well to LAGS while aldosterone, progesterone, estradiol and testosterone did not compete with LAGS. These results suggest that LAGS have steroid specificity for glucocorticoids. The biological actions of LAGS await fur ther study.

Activation of the transcription factor NF-E2-related factor 2 (Nrf2)-signaling pathway is an adaptive response to environmental and endogenous stresses and serves to render animals resistant to chemical carcinogenesis and other forms of toxicity. However, overexpression of Nrf2 has been recognized to promote oncogenesis and resistance to chemotherapy. The application of Nrf2 in tumor chemoprevention and treatment has also become a hot topic. This review focuses on the dual roles of Nrf2 in tumorigenesis and the application of Nrf2 in tumor chemoprevention and treatment.

The high-affinity glucocorticoid binding sites (HAGS) and the low-affinity glucocorticoid binding sites (LAGS) with steroid specificity were demostrated in cerebral cytosol of rats by using the radioligand binding assay. The Kd of HAGS and LAGS were (178?0.71)?l0-8mol/L and (2.12?1.06)?10-6mol/L respecitively as estimated by Scatchard and Pseudoscatchard analysis. Glucocorticoid receptors (GR) in the traumatized(left) hemisphere cytosol were decreased more significantly than those in both the control (right) hemisphere cytosol at 6h postinjury and normal brain tissue (P

Objective To prepare desalted Aconiti Lateralis Radix Praeparata(Danfupian)standard decoction for HPLC content determination and fingerprint analysis.Methods 15 batches of Danfupian standard decoction were prepared,and the transfer rate of monoester alkaloids was calculated by detecting their content.The transfer rates of monoester alkaloids of 15 batches of Danfupian standard decoction were calculated.The fingerprints of Danfupian standard decoction were established by HPLC,and the similarity values of fingerprints were calculated.Results According to the measurement of 15 batches of Danfupian standard decoction,the average transfer rate of monoester alkaloids was 78.03%with a rage from 56.93%to 94.06%.Besides,9 common peaks were determined and 3 peaks were calibrated.Moreover,the similarity was over 0.95 between fingerprints of standard decoction and the control fingerprint of the 15 batches of Danfupian standard decoction.Conclusion This study establishes an HPLC content determination and fingerprint analysis method of Danfupian standard decoction,which can provide reference for the quality control of the TCM granules of Danfupian.

Objective: To understand the epidemic trend of tobacco use among junior middle school students in Shunyi District of Beijing in recent 5 years, and to provide scientific basis for formulating adolescent tobacco control strategies and intervention measures. Methods: The two stage sampling method was used to survey 3 junior middle school schools randomly selected from Shunyi District, Beijing, in November 2013, December 2015 and November 2017. The number of students surveyed each year was 1 520, 1 404 and 1 467 respectively. Results: A total of 4 500 questionnaires were distributed and 4 391 questionnaires were valid, with an effective rate of 97.6%. The current smoking rate and the attempting smoking rate in Shunyi District junior high school students increased substantially, the difference was statistically significant(χ2=9.15, 11.54, P<0.01). The exposure rate of second-hand smoke among junior high school students in Shunyi District is increasing year by year. The current smoking rate and the attempting smoking rate of second-hand smoke at home and in public places were higher than those of non-exposed ones. The differences in the current smoking rates of junior high school students (χ2=25.86, 37.61, P<0.01) and the attempting smoking rate (χ2=49.51, 63-86, P<0.01) were statistically significant. The influence of Shunyi District junior high school students through different tobacco information access channels on the current smoking rate of junior high school students increased year by year. Different tobacco information access channels have significant difference in the influence of the junior middle school students’ attempting smoking rate(P<0.05). Conclusion The overall tobacco use of junior high school students in Shunyi District of Beijing is increasing by year. The exposure of second-hand smoke is not optimistic, and the supervision of tobacco information acquisition channels is urgent to be strengthened.

Objective To investigate the prognostic factors of multi?drug resistant organism (MDRO) infection in patients with infected pancreatic necrosis(IPN). Methods A retrospective study was performed to assess the MDRO in IPN patients. The clinical data of 104 IPN patients admitted to the Department of Pancreatic and Biliary Surgery, the First Affiliated Hospital of Harbin Medical University from June 2013 to January 2019 were analyzed. Fifty?six patients were allocated in the MDRO group and 48 patients in the non?MDRO group depended on drug sensitivity test. There were 37 males and 19 females in the MDRO group with age of 40 (23) years. The duration time was 3(5) days between onset and admission. In the non?MDRO group,34 males and 14 females were included with age of (42±14)years. The duration time was 3(4) days between onset and admission. Normally distributed quantitative variables was represented by , non?normally distributed quantitative variables was represented by M ( QR). Wilcoxon rank?sum test and χ2 test were used to analyze the data. Univariate and multivariable Logistic regression analytic model were used to figure out the risk factors associated with MDRO infection. Results The mean duration of hospital stay was 29.5(31.8) days and hospitalization expenses were CNY 166 991(270 692), which were much higher than those in non?MDRO group (16.5(15.7) days, CNY 56 789(62 354)) (W=1 889, 2 019, both P<0.01). Gram?negative isolates(67.2%, 80/119) were commonly detected in IPN patients. Acinetobacter baumannii was the most common MDRO(27.0%, 20/74). Initial use of carbapenem(OR=2.22, 95%CI: 1.02-4.96, P=0.047) and open necrosectomy(OR=10.00, 95%CI: 3.14-44.77, P<0.01) were the potential risk factors for MDRO?induced infections in IPN. Furthermore, the Logistic regression analysis revealed that open necrosectomy was the independent variable for MDRO infections(OR=9.42, 95%CI:2.92-42.42, P<0.01). Conclusion Open necrosectomy is the independent risk factor for the infection of MDRO.

Objective To investigate the prognostic factors of multi?drug resistant organism (MDRO) infection in patients with infected pancreatic necrosis(IPN). Methods A retrospective study was performed to assess the MDRO in IPN patients. The clinical data of 104 IPN patients admitted to the Department of Pancreatic and Biliary Surgery, the First Affiliated Hospital of Harbin Medical University from June 2013 to January 2019 were analyzed. Fifty?six patients were allocated in the MDRO group and 48 patients in the non?MDRO group depended on drug sensitivity test. There were 37 males and 19 females in the MDRO group with age of 40 (23) years. The duration time was 3(5) days between onset and admission. In the non?MDRO group,34 males and 14 females were included with age of (42±14)years. The duration time was 3(4) days between onset and admission. Normally distributed quantitative variables was represented by , non?normally distributed quantitative variables was represented by M ( QR). Wilcoxon rank?sum test and χ2 test were used to analyze the data. Univariate and multivariable Logistic regression analytic model were used to figure out the risk factors associated with MDRO infection. Results The mean duration of hospital stay was 29.5(31.8) days and hospitalization expenses were CNY 166 991(270 692), which were much higher than those in non?MDRO group (16.5(15.7) days, CNY 56 789(62 354)) (W=1 889, 2 019, both P<0.01). Gram?negative isolates(67.2%, 80/119) were commonly detected in IPN patients. Acinetobacter baumannii was the most common MDRO(27.0%, 20/74). Initial use of carbapenem(OR=2.22, 95%CI: 1.02-4.96, P=0.047) and open necrosectomy(OR=10.00, 95%CI: 3.14-44.77, P<0.01) were the potential risk factors for MDRO?induced infections in IPN. Furthermore, the Logistic regression analysis revealed that open necrosectomy was the independent variable for MDRO infections(OR=9.42, 95%CI:2.92-42.42, P<0.01). Conclusion Open necrosectomy is the independent risk factor for the infection of MDRO.

Objective:To explore the effects of tensile force on vascular lumen formation in three-dimensional printed tissue.Methods:The experimental research method was used. Human umbilical vein endothelial cells (HUVECs) were extracted from discarded umbilical cord tissue of 3 healthy women (aged 22 to 35 years) who gave birth in the Department of Gynaecology and Obstetrics of Suzhou Ruihua Orthopaedic Hospital from September 2020 to May 2021. Human skin fibroblasts (HSFs) were extracted from discarded normal skin tissue of 10 male patients (aged 20 to 45 years) who underwent wound repair in the Department of Hand Surgery of Suzhou Ruihua Orthopaedic Hospital from September 2020 to September 2022. After identification of the two kinds of cells, the 4 th to 6 th passage of cells were taken for the follow-up experiments. HUVECs and HSFs were used as seed cells, and polycaprolactone, gelatin, hyaluronic acid, and fibrin were used as scaffold materials, and the three-dimensional printed vascularized tissue was created by three-dimensional bioprinting technology. The printed tissue with polycaprolactone scaffold of 6 and 10 mm spacing, and without polycaprolactone scaffold were set as 6 mm spacing polycaprolactone group, 10 mm spacing polycaprolactone group, and non-polycaprolactone group, respectively. After 4 days of culture, the printed tissue in 10 mm spacing polycaprolactone group was selected to detect the cell survival by cell viability detection kit, and the cell survival rate was calculated. After 14 days of culture, the printed tissue in three groups were taken, and the shape change of tissue was observed by naked eyes; immunofluorescence staining was performed to observe the arrangement of filamentous actin, and lumen diameter, total length, and number of branches of vessel in the tissue. The tissue with micro-spring structure in the above-mentioned three groups was designed, printed, and cultured for 9 days, and the tensile force applied in the printed tissue was measured according to the force-displacement curve. The number of samples was all 3 in the above experiments. Data were statistically analyzed with one-way analysis of variance and Tukey test. Results:After 4 days of culture, the cell survival rate in printed tissue in 10 mm spacing polycaprolactone group was (91.3±2.2)%. After 14 days of culture, the shape change of printed tissue in non-polycaprolactone group was not obvious, while the shape changes of printed tissue in 6 mm spacing polycaprolactone group and 10 mm spacing polycaprolactone group were obvious. After 14 days of culture, the arrangement of filamentous actin in the printed tissue in non-polycaprolactone group had no specific direction, while the arrangement of filamentous actin in the printed tissue in 6 mm spacing polycaprolactone group and 10 mm spacing polycaprolactone group had a specific direction. After 14 days of culture, The vascular lumen diameters of the printed tissue in 6 mm spacing polycaprolactone group and 10 mm spacing polycaprolactone group were (6.0±1.3) and (10.8±1.3) μm, respectively, which were significantly larger than 0 μm in non-polycaprolactone group ( P<0.05), and the vascular lumen diameter of printed tissue in 10 mm spacing polycaprolactone group was significantly larger than that in 6 mm spacing polycaprolactone group ( P<0.05); the total length and number of branches of blood vessel in the printed tissue in 6 mm spacing polycaprolactone group and 10 mm spacing polycaprolactone group were significantly shorter or less than those in non-polycaprolactone group ( P<0.05), and the total length and number of branches of blood vessel in the printed tissue in 10 mm spacing polycaprolactone group were significantly shorter or less than those in 6 mm spacing polycaprolactone group. After 9 days of culture, the tensile forces applied in the printed tissue in 6 mm spacing polycaprolactone group and 10 mm spacing polycaprolactone group were (2 340±59) and (4 284±538) μN, respectively, which were significantly higher than 0 μN in non-polycaprolactone group ( P<0.05), and the tensile force applied in the printed tissue in 10 mm spacing polycaprolactone group was significantly higher than that in 6 mm spacing polycaprolactone group ( P<0.05). Conclusions:The three-dimensional printed scaffold structure can exert different tensile force in the printed tissue, and the vascular lumen diameter of the printed tissue can be regulated by adjusting the tensile force.

Objective:To investigate the clinical features and prognosis of B-cell acute lymphoblastic leukemia (B-ALL) children with intrachromosomal amplification of chromosome 21 (iAMP21).Methods:The data of 233 children diagnosed with B-ALL who received chemotherapy according to Chinese Children Cancer Group (CCCG) - acute lymphoblastic leukemia -2015 (CCCG-ALL-2015) protocol in the Affiliated Union Hospital of Fujian Medical University from January 2019 to December 2020 were retrospectively analyzed. These patients were divided into iAMP21 group and non-iAMP21 group according to whether iAMP21 was positive in the bone marrow fluid of children before chemotherapy based on ETV6-RUNX1 probe fluorescence in situ hybridization. Children in iAMP21 group received CCCG-ALL-2015 intermediate-risk group regimen induction chemotherapy, while children in non-iAMP21 group received different intensities of chemotherapy according to the clinical risk classification. The clinicopathological characteristics of patients were compared in both groups, the therapeutic efficacy and prognosis of B-ALL children with iAMP21 was analyzed.Results:iAMP21 was found in 5 (2.1%) of 233 B-ALL children. The median hemoglobin concentration in iAMP21 group was higher than that in non-iAMP21 group [99 g/L (71-148 g/L) vs. 74 g/L (30-156 g/L); U = 268.50, P = 0.043]; there were 4 cases (80%) with bone pain in iAMP21 group (5 cases) and 53 cases (23.2%) with bone pain in non-iAMP21 group (228 cases),and the difference in the osteoarticular pain incidence of both groups was statistically significant ( χ2 = 8.53, P = 0.017). There were no significant differences in the proportion of patients with different gender, age, white blood cell counts, platelet counts, hepatosplenomegaly between the two groups (all P > 0.05). Among 5 children with iAMP21, 1 patient was detected with high CRLF2 expression and 1 patient with IKZF1 1-8 exon loss of heterozygosity. The above mentioned two children with iAMP21, whose minimal residual disease (MRD) were still positive after consolidation therapy, and then they received chimeric antigen receptor T-cell treatment and hematopoietic stem cell transplantation. MRD of the other 3 children with iAMP21 turned negative after induction therapy. Up to the last follow-up in October 2021, 5 patients with iAMP21 had disease-free survival. Conclusions:The incidence of B-ALL children with iAMP21 is about 2%. These patients are prone to osteoarticular pain and have relatively mild anemia. The curative effect of some children is still poor after active treatment,which needs to be further clarified with more samples.