OBJECTIVETo observe protective effects of Schisandra extract (SE) on embryotoxicity and reproductive toxicity of early pregnant rats exposed to Benzo[a]pyrene (Bap).

METHODSPregnant rat model was prepared using periodic screening cage method. Totally 50 female pregnant SD rats were divided into five groups by randomized block design according to the weight, i.e., the BaP model group, the low dose SE group, the middle dose SE group, the high dose SE group, the normal control group, 10 rats in each group. Rats in the BaP model group were administered with BaP at a daily dose of 2 mg/kg by gastrogavage. Rats in low, middle, and high dose SE groups were administered by gastrogavage with BaP (at a daily dose of 2 mg/kg) plus SE at a daily dose of 40, 200, and 1 000 mg/kg, respectively. Equal volume of olive oil was administered to rats in the normal control group by gastrogavage. All medication was performed for 8 successive days. Changes of rat body weight in each period were observed. The uterus embryonic total quality and ovary quality were measured, and organ index calculated. The number of corpus luteum, the number of embryo implantation, and the number of absorbed embryo were statistically calculated respectively. The implantation rate and the absorbed embryos rate were calculated. Serum levels of human chorionic gonadotrophin β (β-HCG) and progesterone (PROG) were detected by ELISA.

RESULTSCompared with the normal control group, the weight of 9-day pregnant rats, the number of embryo implantation, the uterus embryonic total index, ovary index, serum levels of β-HCG and PROG all decreased in the Bap model group with significant difference (P < 0.05, P < 0.01). Compared with the Bap model group, body weight, the uterus embryonic total index, and the PROG level increased in 3 dose SE groups (P < 0.05, P < 0.01). Ovary index and serum β-HCG increased in middle and high dose SE groups (P < 0.05, P < 0.01). The number of implantation obviously increased in the high dose SE groups (P < 0.01).

CONCLUSIONSE could reduce the embryotoxicity and reproductive toxicity of early pregnant rats exposed to Benzo[a]pyrene.

Animals ; Benzo(a)pyrene ; toxicity ; Chorionic Gonadotropin ; blood ; Embryo Implantation ; drug effects ; Female ; Ovary ; drug effects ; Plant Extracts ; pharmacology ; Pregnancy ; Progesterone ; blood ; Random Allocation ; Rats ; Rats, Sprague-Dawley ; Reproduction ; drug effects ; Schisandra ; chemistry ; Uterus ; drug effects

Objective To explore the changes of Clara cell secretory protein(CCSP) in asthmatic children and the effects of inhaling glucocorticoid (ICS) on CCSP.Methods Sixty children with asthma were selected as asthma group(in which 39 cases were male and 21 cases were female,aged 3-12 years old) and 30 healthy children were selected as healthy control group(in which 20 cases were male and 10 cases were female,aged 3-12 years old).Venous blood samples were collected in asthma group and healthy control group in morning before breakfast,and then sera were obtained by centrifuge in speed of 1 500 r?min-1 in 10 min.The dynamic levels of CCSP were measured in sera by enzyme-linked immunosorbent assay.Results 1.In asthmatic children,the CCSP levels in acute episode,3 months after ICS,6 months after ICS, and 12 months after ICS[(5.140?2.331)?g?L-1,(8.730?3.392)?g?L-1,(10.510?2.813)?g?L-1]were all lower than that in healthy control group[(13.230?4.010)?g?L-1](Pa0.05).2.Compared with acute episode,the patients who ICS for 3 months,6 months and 12 months had significantly higher levels of CCSP (Pa0.05).Conclusions CCSP may play a protective role in the airway inflammation of asthma.Glucocorticoid may increase CCSP level in asthmatic children.Glucocorticoid and CCSP may cooperate in anti-inflammation in airway of asthmatic children.

Objective: To explore the structural domains of the CENP-E protein that interact with Mps1 protein.Methods: Two recombinant vectors named pEGFP-CENPE2(containing 674-1085 amino acids of CENP-E protein) and pEGFP-CENPE 3(containing 1200~2134 amino acids of CENP-E protein) were transfected into human embryo kidney 293(HEK293) cells respectively.The respective energy transfer efficiency(Ef) between either EGFP-CENPE2 and Mps1,or EGFP-CENPE3 and Mps1 were detected by FRET through selective photobleaching of the acceptors.Results: Both recombinant proteins expressed in HEK293 cells transfected by the recombinant plasmids were found to co-localize with the Mps1 protein as confirmed by confocal microscopy.The Ef between EGFP-CENPE3 and Mps1 protein was [(12.63?0.48)%,n=30] and that between EGFP-CENPE3 and Mps1 protein was [(3.17?0.21)%,n=30] as revealed by the results from FRET,the result of FRET was confirmed by co-Immunoprecipitate(CO-IP) method.When compared with that between the control and Mps1,the Ef between EGFP-CENPE3 and Mps1 was significantly higher(p

Objective To explore the roles of clara cell secretory protein(CCSP)and eosinophil cationic protein(ECP)in the pathoge-nesis of bronchial asthma and to evaluate their diagnostic value in asthmatic children.Methods Induced sputum samples were obtained from 31 asthmatic children during chronic persistent period and clinical remission period.According to global initiative for asthma(GINA),the total of 31 cases accepted systemic treatment by inhaling glucocorticoid.The patients included 18 boys and 13 girls aged from 3.7 to 12.0 years,and their average age was 7.6 years.Sputum CCSP concentrations were measured by enzyme-linked immunosorbent assay(ELISA).And the concentrations of sputum ECP were determined with Pharmacia UniCAP system.Results Asthmatic children had significantly lower CCSP levels in sputum during chronic persistent period compared with clinical remission period(P

Objective To explore roles of total immunoglobulin E(IgE),interleukin-13(IL-13) in asthmatic children,and relation-ship between IgE,IL-13 levels in serum and those in induced sputum.Methods Twenty-six children with asthma who were in chronic persistent period and 20 healthy children were enrolled.Serum and hypertonic saline-induced sputum were obtained in asthmatic children,and serum alone were obtained in control subjects.The levels of IgE were deteced in serum and induced sputum by Pharmacia UniCAP system,and levels of IL-13 were measured by enzyme linked immunosorbent assay(ELISA).Results Asthmatic children had significantly higher serum of IgE and IL-13 levels than those of healthy control group(P0.05).There was positive correlation of IL-13 in serum and induced sputum(r=0.432 P

Objective To study the chemical kinetics characteristics in a new revised method with low usage amount of arsenic trioxide for determining urinary iodine by arsenite-ceric catalytic spectrophotometry using ammonium persulfate digestion,and to study the impact of operating bias in arsenite-ceric reaction temperature and reaction time on final results in this method.Methods The absorbances (A) of arsenite-ceric reaction of iodine standard series were measured at different reaction temperature and time,and the results were analyzed according to the chemical kinetics equation.The change values and half-life of A values of the new revised method and the current standard method were calculated.The chemical kinetics model of reaction system for this new revised method was deduced from experimental results.The calculation formula of result relative error for urinary iodine determination was deduced based on constants reaction temperature and reaction time and reaction rate constant factor.The result relative errors caused by operation deviation of reaction temperature or reaction time in the determination of urinary iodine were calculated.Results The usage amount of arsenious acid solution in the new revised method was only a quarter of usage amount of the current standard method(WS/T 107-2006).A values of each concentration of standard curve series at different reaction time t were obtained,the lnA to t mapping was a straight line,the linear correlation coefficients were-0.9995--0.9999.These results were in accord with the characteristic of chemical first-order reaction.Relationships between the reaction rate constant K and the reaction temperature T in the temperature range of 20-35 ℃ were well accord with Arrhenius equation.The A values and iodine concentrations (C) at various experimental temperatures showed good C =a + blnA linear relation,the absolute value of the linear correlation coefficient(｜ r ｜) ＞ 0.9990.After calculation and comparison of changes in the half-life of A values in the new revised method and in the original standard method at 20,25,30,35 ℃ reaction temperature,half-life of A values of 0-300 μg/L iodine standard series in the new revised method and in the original standard method were 191.0-11.4 min and 66.8-10.2 min at 25℃,respectively.Under the same conditions of 25 ℃ for 40 min,the gradient of A values of 0-300 μg/L iodine standard curve in the new revised method was similar to that of the original standard method(slope-133.7,-139.2,respectively).But differences between A values of standard curve and the reaction initial absorbance(A0) in the original standard method were 1.4 to 3.7 times those of the new revised method.A chemical kinetics model of reacting system for this method was established.A series of urinary iodine results relative error data were obtained when reaction temperature deviation was ± 1,± 0.5,± 0.3 ℃ or reaction time deviation was ± 1 min for sample test tubes.Data showed that relative errors of urinary iodine results caused by reaction temperature deviation or reaction time deviation in the new revised method were less than those of the original standard method.Conclusions The iodine-catalyzed arsenite-ceric reaction in the new revised method is a first-order reaction,when measuring 0-300 μg/L urinary iodine at 20-35 ℃,and 300-1200 μg/L urinary iodine at 20-30 ℃,the calibration relation of C =a + blnA is established when arsenite-ceric catalytic spectrophotometry is kept at a certain stable temperature and in certain stable reaction time.Compared with the original standard method,using the revised method with low usage amount of arsenic trioxide for measuring urinary iodine,the arsenite-ceric reaction rate is slow down.As a result,this method is easier to operate and has better precision and accuracy.

Objective To observe the treatment of ~(99)Te-MDP on typeⅡcollagen induced arthritis (CIA)in rat,and the effect on the expression of synovial MMP-3 and TIMP-1 mRNA.To explore the mech anisms of the ~(99)Te-MDP in the treatment of rheumatoid arthritis.Methods The rats in which C1A(n=24)were divided into three group:the control group(n=8),~(99)Tc-MDP group(n=8)and Methotrexate group(n=8). Arthritis were evaluated by arthritis index and histopathological index and the expressions of MMP-3 and TIMP-1 mRNA in synovium were detected by RT-PCR.Results①The arthritis indexs of the control group, the methotrexate group,the ~(99)Tc-MDP group were increased with time.②The histopathological scnres of the control group were significantly higher than those of methotrexate group and ~(99)Tc-MDP group(P＜0.01).The histopathological scores of cartilage destruction and bone erosion of ~(99)Tc-MDP group were lower than those of methotrexate group(P＜0.05).③The levels of MMP-3 mRNA of the control group,~(99)Tc-MDP group, methotrexate group were notably higher than those of the control group(P＜0.01).The levels of control group was notably higher than that of the ~(99)Tc-MDP group(P＜0.05).There was not significant difference in all groups on the levels of TIMP-1 mRNA(P＞0.05).Conclusions ~(99)Tc-MDP can notably relieve the arthritis symdrome and retard the catilage damage and bone erosion of CIA in rats,and could significantly decrease the MMP-3 mRNA in the synovium.Which may be one of the therapeutic mechanism.~(99)Tc-MDP is better than methotrexate in retarding catilage and bone erosion and decreasing MMP-3 mRNA in CIA rats in a 3-week therapeutic intervention.

Objective To investigate the preoperative psychological requirement of patients undergoing da Viric S Robotic Cardiac Surgery in order to provide scientific data for the effectively nursing interventions.Methods One hundred and six cardiac patients scheduled for Total Robotic operation were selected.They were surveyed on the first day in hospital and 2 hours before operation by self-designed questionnaire.Results Total score of the psychological requirement of patients undergoing total robotic cardiac surgery was 96 to 171 ( 137.52 ±18.54).The amount of items which necessary rate was more than 50％ was 20,they occupied 48 percent of all items.The psychological requirements of patients undergoing total robotic cardiac surgery were various,which mainly embodied in the following:wanting to know the success rate of total robotic cardiac surgery(3.70 ±0.54),wanting to understand the progress and changes of disease(3.68 ±0.51 ),wanting to understand the effect of total robotic operation(3.64 ±0.59),wanting to communicate with the patients underwent total robotic cardiac surgery (3.63 ±0.62).Conclusions The patients have many psychological requirements before to receive total robotic cardiac operation,we should take corresponding nursing countermeasures based on different psychological needs,pay attention to the patient' s health guidance and the preoperative interview in order to promote recovery.

Objective To approach the clinical significance of Clara cell secretary protein(CCSP) in bronchial asthmatic children. Methods Serum were collected from 50 cases during asthmatic attacks, 22 asthmatic children who were in stable conditions, and 20 healthy children. Serum CCSP concentrations were measured by a human CCSP enzyme- linked immunosorbent assay (ELISA). Results Asthmatic children had significantly lower levels of CCSP in serum during asthmatic attacks(P

Objective To explore the role of Clara cell secretory protein(CCSP) in asthmatic children and compare the levels of CCSP in sera and induced sputum.Methods Thirty-four children with asthma who were in remission and 25 healthy controls were enrolled.Sera and hypertonic saline-induced sputum were obtained in asthmatic children,and sera alone were obtained in control subjects.The le-(vels) of CCSP were measured in sera and induced sputum by enzyme linked immunosorbent assay.Results Asthmatic children,compared with controls,had significantly lower concentration of CCSP in sera(P