Study on release and antioxidant activity of quercetin after loaded by hot alkali hydrolysis modified UiO-66 material / 药学学报

UiO-66 (University of Oslo 66) is a kind of promising material that can improve the release and bioavailability of poorly water-soluble bioactive compounds of traditional Chinese medicine. However, the loading of quercetin in raw UiO-66 was not ideal. In this study, UiO-66-BH (UiO-66-blend-heating) was obtained by heating UiO-66 and KOH solution following blended them. UiO-66-BH maintained the outline of octahedral structure of UiO-66 but with obvious rough and uneven pores on the surface. UiO-66-BH had good adsorption of quercetin with saturation adsorption was 138.92 mg·g-1, the adsorption process belonged to single molecular layer adsorption and was controlled by chemisorption. UiO-66-BH can control the release of quercetin in simulated gastrointestinal fluid, and the drug concentration was significantly higher than that of free quercetin after long-term release (36% vs 9%). Compared with quercetin, the ABTS (2,2′-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) ammonium salt) radical scavenging activity of UiO-66-BH@quercetin drug delivery system decreased, while the DPPH (1,1-diphenyl-2-picrylhydrazyl) radical scavenging activity remained almost unchanged. The drug delivery system showed a strong antioxidant effect similar to quercetin. The findings indicated that UiO-66-BH could control release of quercetin and was expected to be used as a drug carrier material for some insoluble active components of traditional Chinese medicine such as quercetin.

The clinical value of von Willebrand factor and VITRO score in evaluating disease progression in patients with HBV infection / 中华肝脏病杂志

Objective: To explore the clinical value of von Willebrand Factor (vWF) and VITRO score (vWF:Ag/platelet count) in assessing disease progression in patients with HBV infection. Methods: Randomly collect relevant clinical data of 308 patients with HBV infection (including 154 cases of chronic hepatitis B, 66 cases of hepatitis B cirrhosis in compensatory period, 88 cases of hepatitis B cirrhosis in decompensated period) from December 1, 2018 to January 5, 2021 in the Second Affiliated Hospital of Chongqing Medical University. The vWF values are measured by a uniform optical method, and all data are included using a uniform standard. Analyze the difference and significance of plasma vWF level and VITRO score in chronic hepatitis B, hepatitis B cirrhosis in the compensatory phase and decompensated phase. Results: The plasma vWF level and VITRO score of the chronic hepatitis B group were (139.47±76.44) and (0.86±0.8), respectively, and the hepatitis B cirrhosis compensated group was (164.95±67.12 and 1.44±1.14), respectively. Hepatitis cirrhosis decompensated group were (317.48±103.32 and 6.81±4.98), respectively; plasma vWF level and VITRO score increased with the progression of HBV infection, and the difference was statistically significant (F=133.669,P=0.000F=137.598,P=0.000).The plasma vWF level and VITRO score in patients with hepatitis B cirrhosis were (185.65±85.07 and 2.3±2.37) in the Child-Pugh A group, (304.74±105.81 and 6.37±5.19) in the B grade group, and (369.48±73.238.28±5.38) in the C grade group; plasma vWF level and VITRO score in patients with hepatitis B cirrhosis increased with the increase of Child-Pugh grade, and the difference was statistically significant (F=60.236, P=0.000F=32.854, P=0.000). The area under the curve (AUC) of plasma vWF level and VITRO score for diagnosing the decompensated stage of hepatitis B cirrhosis were 0.897 [95% confidence interval (CI): 0.855-0.940, P＜0.01], 0.949 [95% CI: 0.916-0.982, P＜0.01). When the vWF level and VITRO score were taken as cut-off values of 238.5% and 1.65, respectively, the sensitivity of diagnosing the decompensated stage of hepatitis B cirrhosis was 79.5% and 94.3%, the specificity was 92.3% and 87.7%, and the positive predictive value was 80.5% and 94.3%, the negative predictive value was 91.9% and 97.5%, and the diagnostic accuracy was 88.6% and 89.3%. Among the patients with decompensated hepatitis B cirrhosis, the level of vWF in the group with gastrointestinal bleeding (367.24±68.29)% was significantly higher than that in the group without gastrointestinal bleeding (286.15±109.69)%, and the difference was statistically significant (P＜0.001) The VITRO score of the group with gastrointestinal bleeding (9.12±5.4) was significantly higher than that of the group without gastrointestinal bleeding (5.36±4.13), and the difference was statistically significant (P＜0.01). The vWF level in the spontaneous peritonitis group was (341.73±87.92)% higher than that in the non-spontaneous peritonitis group (296.32±111.74)%, and the difference was statistically significant (P＜0.05). There was no statistical difference in VITRO score between the two groups. significance. Conclusion: Plasma vWF level and VITRO score can evaluate the progression of liver disease and the degree of decompensation of liver cirrhosis in patients with HBV infection, and have a predictive effect on various complications after decompensation of liver cirrhosis, and have certain guiding significance for early intervention measures.

Value of galactose-deficient IgA1 in the early diagnosis of Henoch-Schönlein purpura nephritis in children / 中国当代儿科杂志

OBJECTIVE@#To explore the value of galactose-deficient IgA1 (Gd-IgA1) in the early diagnosis of Henoch-Schönlein purpura nephritis (HSPN) in children.@*METHODS@#A total of 67 hospitalized children who were definitely diagnosed with HSPN between January and April 2018 and 58 hospitalized children with Henoch-Schönlein purpura (HSP) were enrolled in the study. Twenty children undergoing routine physical examinations served as controls. The levels of serum and urine Gd-IgA1 were determined using ELISA. The receiver operating characteristic curve was used to analyze the value of serum Gd-IgA1 and urine Gd-IgA1/urine creatinine ratio in the diagnosis of HSPN.@*RESULTS@#The level of serum Gd-IgA1 and urine Gd-IgA1/urine creatinine ratio in children with HSP or HSPN were significantly higher than those in healthy control group (P<0.01), with a significantly greater increase observed in children with HSPN (P<0.01). Serum Gd-IgA1 ≥1 485.57 U/mL and/or urine Gd-IgA1/urine creatinine ratio ≥105.74 were of favorable value in the diagnosis of HSPN. During the six-month follow-up of the 49 children with HSP, the incidence of HSPN was 47% (23/49), which included a 100% incidence in children with serum Gd-IgA1 ≥1 485.57 U/mL and a 73% incidence in children with urine Gd-IgA1/urine creatinine ratio ≥105.74.@*CONCLUSIONS@#Serum and urine Gd-IgA1 is of favorable clinical value in the early diagnosis of HSPN.

Reliability and validity of the Chinese version of Rheumatoid Arthritis Self-Efficacy Scale / 中国实用护理杂志

Objective To translate Rheumatoid Arthritis Self-efficacy Scale (RASE) into Chinese and to evaluate its reliability and validity. Methods A total of 188 hospitalized patients with rheumatoid arthritis (RA) were selected as research subjects through convenience sampling method. According to the translation mode of the scale, Chinesization and cultural adjustment were conducted to the English version of RASEto test reliability and validity. Results Item analysis showed that the Chinese version of RASE could discriminate the high-score group from the low-score group (P<0.01). Pearson correlation analysis showed that the correlation coefficient between the score of each item and the total score of the Chinese version of RASE was positively correlated (P<0.01).Exploratory factor analysis extracted a total of 8 common factors, which explained 68.55％of the total variance. The Cronbachαof the Chinese version of RASE was 0.901, and Cronbachαof each dimension ranged from 0.660 to 0.867;the retest reliability was 0.955 after 1 week, and ranged from 0.819 to 0.984 for each dimension;the split-half reliability coefficient was 0.848. Conclusion The Chinese version of RASE has good reliability and validity, which can be applied to the research of self-efficacy of patients with RA in China.

Expression and significance of tight junction proteins in the kidney in a mouse model of renal ischemia-reperfusion injury / 中国当代儿科杂志

OBJECTIVE@#To study the expression and significance of tight junction proteins (claudin-2, claudin-10, and claudin-17) in a mouse model of renal ischemia-reperfusion injury.@*METHODS@#A total of 152 male C57BL/6 mice were randomly assigned to control group (n=8), sham-operation group (n=72), and model group (n=72). The renal pedicles at both sides were clamped for 30 minutes to establish a mouse model of renal ischemia-reperfusion injury. According to the time points of reperfusion (0, 3, 6, 12, 24, 48, and 72 hours and 5 and 7 days), the sham-operation group and the model group were further divided into 9 subgroups, with 8 mice in each subgroup. RT-PCR and immunohistochemistry were used to measure the mRNA and protein expression of claudin-2, claudin-10, and claudin-17 in renal tissue.@*RESULTS@#The control and sham-operation groups had no significant changes in the mRNA and protein expression of claudin-2, claudin-10, and claudin-17 in renal tissue over the time of reperfusion (P>0.05). Compared with the control and sham-operation groups, the model group had decreased mRNA and protein expression of claudin-2 and claudin-10 after reperfusion, and the expression decreased gradually over the time of reperfusion, with the lowest levels at 24 hours of reperfusion (P<0.05). Compared with the control and sham-operation groups, the model group had increased mRNA and protein expression of claudin-17 after reperfusion, and the expression increased gradually over the time of reperfusion, with the highest mRNA level at 12 hours and the highest protein level at 24 hours of reperfusion (P<0.05).@*CONCLUSIONS@#Renal ischemia-reperfusion injury is closely associated with abnormal expression of tight junction proteins claudin-2, claudin-10, and claudin-17.

Problems of the education for postgraduates of infectious diseases and the solutions / 中华医学教育探索杂志

This paper analyzed the current problems and difficulties of the education for postgraduatesof infectious diseases,such as the outdated courses and nonstandard cultivating model,which demonstrated the necessity for teaching reform and innovation.Specifically,several innovation approaches were posed,including optimizing the coursesoffered,updating the training mode,and emphasizing the improvement of supervisors,with the purposes of promoting the postgraduates' clinical and research skills and cultivating their innovation and social adaptation abilities.

Effects of Shuxuetong on Hemodynamics and Serum sICAM-1, IL-6, TNF-α in Patients with Cerebral Infarction / 昆明医科大学学报

Objective To investigate the effects of Shuxuetong on hemodynamics and serum sICAM-1,IL-6,TNF-α in patients with cerebral infarction.Methods A hundred patients with cerebral infarction were randomly divided into observation group and control group from Jan 2011 to Jan 2015.Fifty patients in control group were treated with conventional therapy alone and 50 patients in observation group were treated with conventional therapy combined with intravenous injection with Shuxuetong.The changes of hemodynamics were observed before and after treatment and the levels of serum sICAM-1,IL-6,TNF-α were detected by enzyme linked immunosorbent assay (ELISA).Results No statistical significance was found in hemodynamics of control group before and after treatment (P ＞0.05).The indexes of hemodynamics in observation group were significantly improved compared with those in observation group before treatment and those in control group after treatment (P＜ 0.05).The levels of serum sICAM-1,IL-6,TNF-α were significantly reduced in two groups after treatment (P ＜0.01) and the levels of serum sICAM-1,IL-6,TNF-α after treatment were significantly lower in observation group than those in control group (P＜0.01).Conclusion Shuxuetong can effectively improve the indexes ofhemodynamics and reduce the levels of serum sICAM-1,IL-6 and TNF-α.It has a positive effect on the treatment of cerevral infarction.

Influence of montelukast sodium chewable tablets in children with allergic asthma / 中国生化药物杂志

Objective To investigate the effect of montelukast sodium chewable tablets on pulmonary function in children with allergic asthma . Methods 86 cases of children with allergic asthma were randomLy divided into 2 groups, 43 cases in the control group were treated with routine clinical treatment, 43 cases in the experiment group received more with montelukast sodium chewable tablets.Serum T lymphocyte subsets, IL-6, TNF-α, IL-4 concentration levels, as well as FVC, FEV1, PEF levels and clinical efficacy were compared of two groups pre-and post-treatment.Results Compared with pre-treatment, Serum CD4 +, CD4 +/CD8 +, FVC, FEV1 and PEF levels in 2 groups increased, serum CD8 +, IL-4, IL-6, TNF-a levels decreased, compared with the control group, serum CD4 +, CD4 +/CD8 +, FVC, FEV1, PEF level and the effective rate in the experiment group post-treatment were higher, serum CD8 +, IL-4, IL-6, TNF-αlevels and the ineffective rate were lower, the differences were statistically significant (P<0.05).Conclusion Montelukast sodium chewable tablets can effectively improve the imbalance of immune function in children with allergic asthma , improve lung function, and has good clinical efficacy.

The safety of telbivudine in preventing mother-to-infant transmission of hepatitis B virus in pregnant women after discontinuation / 中华肝脏病杂志

<p><b>OBJECTIVE</b>To determine the efficacy and safety of telbivudine for blocking intrauterine transmission of hepatitis B virus (HBV) in pregnant women with high-load HBV DNA.</p><p><b>METHODS</b>Women in general good health and pragnant were enrolled for study between the ages of 20 to 40 year-old, with a diagnosis of HBV infection with high-load HBV DNA level (≥1*10(6) IU/ml). According to each participant's willingness, the women were divided into a telbivudine treatment group (82 women) and an untreated control group (75 women). The telbivudine treatment was initiated at gestation week 26 as oral dosing of 600 mg/d and continued until 1 month after the birth.Women in the control group had not gotten any antiviral drug treatment. All of the women delivered by cesarean section, and all of the neonates were administered the standard passive immunization therapy, which consisted of a hepatitis B immunoglobulin (200 IU) injection given within 12 hours of birth and an injection of hepatitis B vaccine (20 µg) at birth and at postnatal month 1 and 6. None of the mother's performed breastfeeding.</p><p><b>RESULTS</b>The telbivudine-treated women showed a significant decrease in HBV DNA levels prior to delivery, as well as significantly decreased prenatal HBV DNA levels (>2 logl0). Efficiency of the telbivudine treatment was 100%. Immediately prior to delivery, 16 (19.5%) of the women in the telbivudine treatment group showed negative HBV DNA status, as opposed to the untreated control group in which no women showed negative status. The telbivudine treatment group had no case of maternal or fetal adverse reaction or of congenital malformation.</p><p><b>CONCLUSION</b>Use of telbivudine antiviral therapy during late pregnancy in women with high-load HBV DNA can significantly reduce level of HBV DNA in maternal peripheral blood, block HBV intrauterine transmission, and provide good short-term efficacy, with good tolerability and safety.</p>

Participating in the evaluation of combined value assignment of Cystatin-C as a national standard material candidate / 国际检验医学杂志

Objective As a collaborator of Beijing Institute of Medical Device Testing for value assignment of state standard ma-terial candidate Cystatin-C ,we have used the internationally accepted reference material to assign value for state standard material candidate Cystatin-C ,and help Beijing Institute of Medical Device Testing get Cystatin-C national standard material certificate . Methods According to the target value and operational procedure of international reference material ERM-DA471 ,We have tested 6 dilutions of standard material candidate Cystatin-C on calibrated Hitachi 7180 immunoassay system .Results The results demon-strate good repeatability and commutability ,and have been accepted in calculating the final value for the candidate standard materi-al ,our data has assisted Beijing Institute of Medical Device Testing in passing the criteria and obtaining Cystatin-C national standard material certificate .Conclusion Compared to the data from all participating collaborators ,our results hit right on the target value , and no significant matrix effects have been observed .

Establishment of first national standard of Cystatin C / 中华检验医学杂志

Objective To establish the first national standard of Cystatin C.Methods The candidate standard was prepared from human recombinant Cystatin C,diluted and dispensed aseptically.Homogeneity and stability study were carried out on the automated biochemical analyzer.The target value was assigned by six laboratories using widely recognized immumoassay under strict conditions,and traceable to ERM-DA471.Commutabilities of the candidate standard and its saline dilutions were evaluated according to EP14-Evaluation of Matrix Effects.Excel 2007 was used to analyze the results.Results The preparation had good immunological activity and was proved to be homogeneous and stable (6 months sealed at 2-8 ℃,30 days sealed at room temperature and 37 ℃,30 days open-vial at 2-8 ℃).The assigned value of the preparation was (4.47 ± 0.25) mg/L (coverage factor k =2).The candidate standard and/or its saline dilutions have commutability on the 10 evaluated systems.Conclusion The preparation meets the requirements of national secondary standard and could be used in quality control and evaluation of Cystatin C assays in China.

Significance of thoroughly study and practice ‘ Bethune spirit’ for development of affiliated teaching hospital / 中华医学教育探索杂志

Medical ethics is correlated with further development of affiliated teaching hospital.Our hospital took ‘ Bethune spirit’ and philosophy of forgiveness and kindheartedness as guidance and became the first batch of Bethune spirit model hospital of Chongqing.Teaching quality was improved by providing lectures about ‘ Bethune spirit’ for medical students and equally emphasizing medical knowledge and medical ethics education.Anti-corruption and academy governing movements with the subject of ‘ Bethune spirit’ were carried out to repel academic misdeed,with the result that clinical,teaching and scientific works were promoted and advanced.

Enhanced proliferation inhibition and apoptosis-inducing effects of docetaxel-loaded lipid microbubble on human pancreatic cancer cells in vitro / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the proliferation inhibition and apoptosis-inducing effect of docetaxel-loaded lipid microbubble (DLLM) combined with ultrasound targeted microbubble destruction (UTMD) on human pancreatic cancer cells in vitro.</p><p><b>METHODS</b>DLLM was prepared by mechanical vibration, and its physical properties were characterized. The median inhibitory concentration (IC(50)) of DLLM was determined with MTT assay, and its cytotoxicity evaluated with cell counting Kit-8 (CCK-8) assay. The effects of docetaxel, DLLM, and DLLM combined with UTMD on cell cycle and apoptosis of BxPC3 cells were tested with flow cytometry (FCM) and TUNEL assay, respectively.</p><p><b>RESULTS</b>DLLM had an average size of 1.6 µm, and the average drug entrapment efficiency and drug-loaded amount was 64.2% and 16.1%, respectively. Compared with the control groups, DLLM had a significantly enhanced cytotoxic effect (P<0.01) and caused an increased apoptosis rate in BxPC3 cells (P<0.01). Cell cycle analysis showed that DLLM combined with UTMD resulted in an significantly higher percentage of cells with G(2)/M phase arrest than the other treatments (P<0.01).</p><p><b>CONCLUSIONS</b>DLLM combined with UTMD can increase G(2)/M phase arrest and enhance the proliferation inhibition and apoptosis-inducing effect on BxPC3 cells, and can serve as an effective drug delivery system for pancreatic cancer therapy.</p>

Effect of docetaxel-loaded lipid microbubbles combined with ultrasound targeted microbubbles destruction on microvessel of rabbit VX2 liver tumor models / 中国介入影像与治疗学

ObjectiveTo observe the inhibition effect of docetaxel-loaded lipid microbubbles (DLLM) combined with ultrasound targeted microbubbles destruction (UTMD) on microvessel in rabbit VX2 liver tumor models.MethodsSixty rabbits were randomly divided into 6 groups (n= 10),i.e.Doc group (used docetaxel only),DLLM group (used docetaxel-loaded lipid microbubbles),Doc+US group (used docetaxel combined with ultrasound positioning irradiation),PLM+US group (used microbubbles combined with ultrasound positioning irradiation),DLLM+US group (used docetaxel-loaded lipid microbubbles combined with ultrasound positioning irradiation) and control group.The expression of CD34 and VEGF and microvessel density (MVD) were compared among different groups.ResultsAfter treatment,the expression of CD34 in DLLM+US group was lower,the MVD of DLLM+US group was markedly lower than that of the other groups (P＜0.01),while the expression of VEGF in this group was the lowest among all 6 groups (P＜ 0.01).ConclusionDLLM combined with UTMD can inhibit the generation of microvessels in rabbit VX2 liver tumor,thus inhibit the growth of the tumor.

Effects of paclitaxel loaded ultrasound contrast agents on cell cycles and ultrastructural features of HepG2 cells / 中华肝脏病杂志

<p><b>OBJECTIVES</b>To investigate the effects of paclitaxel loaded ultrasound contrast agents on cell cycles and ultrastructural features of HepG2 cells.</p><p><b>METHODS</b>HepG2 cells were cultured, and divided into a blank control group, a paclitaxel group, an ultrasound contrast agents group, and a paclitaxel loaded ultrasound contrast agents group. Cell cycles of the four groups were detected by flow cytometry, and the ultrastructural changes of the cells were observed under a transmission electron microscope.</p><p><b>RESULTS</b>Paclitaxel loaded ultrasound contrast agents blocked the HepG2 cells at their G2/M phases, and it also induced more apoptosis of the HepG2 cells.</p><p><b>CONCLUSIONS</b>Paclitaxel loaded ultrasound contrast agents can block HepG2 cells at the G2/M phase and induce apoptosis of the cells.</p>

The preparation and properties of docetaxel-carrying lipid microbubble ultrasound contrast agent / 中华超声影像学杂志

Objective Self-made docetaxel-carrying microbubbles were developed and evaluated as a new ultrasound contrast agent for diagnosis and targeted-chemotherapeutic drug delivery.Methods Docetaxel was mixed with an aqueous suspension of phospholipids in vials,which were put into 40℃ water for 30 minutes,after cooling,gas in vials was replaced with perfluoropropane gas,then vials were agitated for 45 s on a shaking device.Properties were studied contained concentration,size,zeta potential,drug entrapment efficiency and drug-loading amount.Drug released with ultrasound and imaging for VX2 carcinoma in rabbits were observed.Results Docetaxel-carrying microbubbles had a concentration of approximately 2.2×109～3.2×109/ml,a mean size of 623.1 am and a zeta potential of -(3.1±0.9)mV.Size distribution was 473.4～706.6 nm.Drug entrapment efficiency was more than 70% and drug-loading amount was(17.5±0.8)%.Fixed amount of ultrasound energy ruptured microbubbles and released docetaxel.Liver imaging of rabbits could be enhanced obviously and persistently,"fast in and out"phenomena was typical of VX2 carcinoma.Conclusions Liposome microbubbles represent a new class of acoustically active drug delivery vehicles.Docetaxel-carrying microbubbles can promote the value of ultrasound in tumor diagnosis,and docetaxel-carrying microbubbles combined with ultrasound have a hope to establish a kind of real-time monitoring,targeted system for tumor therapy.

Targeting study in vitro of human hepatocellular carcinoma-targeted perfluorocarbon lipid particles / 中华超声影像学杂志

Objective To develop perfluorocarbon lipid particles and investigate their basic properties,and target them to human hepatocellular carcinoma cells in vitro by hepatoma monocolonal antibody HAb18 with avidin-biotin interaction.Methods Rotary evaporation and high pressure homogen were used to prepare perfluorocarbon lipid particles, and the appearance and distribution of them were investigated by microscope and electron microscope, the concentration and the size and electric potential were detected.The biotinylated monoclonal antibody HAbl8 was prepared, then the biotinylated degree of the antibody was determined.The biotinylated perfluoroearbon lipid particles labelled with NBD were prepared and targeted to human hepatocellular carcinoma cells in vitro with avidin-biotin interaction.Results These perfluorocarbon lipid nanoparticles were uniform and stable,and the mean diameter of them was 171.9 nm.Hepatocellular carcinoma cells were surrounded by the biotinylated particles labelled with NBD.Conclusions A steady perfluoroearbon lipid particles were prepared and the biotinylated particles can be targeted to hepatocellular carcinoma cells with avidin-biotin interaction.