Objective To study the effects of Lipoxins A4(LXA4)on the expressions of aquaporin(AQP)1,3,5 in type Ⅱ pneumonocytes(ATⅡ)of rat treated with lipopolysaccharide(LPS).Method One pathogenfree male Spree Dawley(SD)rat every time.weighing 200～250 g,were used for the study.The typeⅡpenumonocytes of rats were isolated and purified,and the changes of cellular ultrastructure were observed by electron microscope in order to get the purity quotien＞90%.The type Ⅱ pneumonocytes were divided randomly into five groups,namely,vebicukun group(alcohol 0.7μL/mL),control group,LXA4 group(1×10-7mol/mL),endotoxin group(LPS 1μg/mL)and LXA4+LPS group(LXA4 1×10-7mol/mL,LPS 1μg/mL).AQP-1,3,5 mRNA of in the typeⅡpenumonocytes were assayed by using reversal transcription poly chain reaction(RT-PCR),and the expressions of AQP-1,3,5 protein were detected by using.immunohistochemistry(IHC).One each specimen,these tests were repeated for six times.ANOVA was used for statistical analysis.Results RT-PCR and IHC showed that when AT Ⅱ treated with 1 μg/mL LPS for 4 hours,the AQP-1,3,5 mRNA and the expressions of AQP-1,3,5 protein were significantly decreased in LPS group compared with control group(P＜0.01).However,the AQP-1,3,5 mRNA and the expressions of AQP-1,3,5 protein after application of LXA4 significandy increased in LPS+LXA4 group in comparison with LPS group(LPS+LXA4,AQP1:0.647±0.132,AQP3:0.900±0.856,AQP5:0.879±0.058;LPS,AQP1:0.297±0.133,AQP3:0.512±0.113,AQP5:0.647±0.110;P＜0.01).The AQP-1,3,5 mRNA and the expressions of AQP-1,3,5 protein were aignificandy increased in LXA4 group in comparison with control group(LXA4,AQP1:0.539±0.142,AQP3:0.818 4-0.176,AQP5:0.841±0.066;Blank Control,AQP1:0.518±0.139;AQP3:0.138±0.136,AQP5:0.766±0.066;P＜0.01).Conclusions AQP-1,3,5 exist in typeⅡpenumonoeyte of rata,and the LXA4 can up-regulate the mRNA and protein expressions of AQP-1,3,5 in Type Ⅱ penumonocytes of rats treated with LPS.

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Objective To investigate the effects of lipoxin A4 on store-operated calcium channel (SOC) and production of reactive oxygen species in macrophages induced by hpopolysaccharide (LPS).Method Macrophages were randomly assigned Io one of the following six groups:control group,LPS group,Thapsigargin group,lipoxin A4+LPS group,lipoxin A4+Thapsigargin group,2-Aminoethoxydiphenylborate+Thapsigargin group.The intracellular[Ca2+]iwas analyzed by eonfoeal laser microscopy.The production of reactive oxygen specips(ROS) was assayed by flow cytometry.Results LPS increased intracellular[Ca2+]i and reactive oxygen species in a dose-dependent manner.Lipoxin A4 suppressed approximately 75% of the Ca2+ ertry signal induced by thapsigargin and suppressed approximately 93% of the Ca2+ entry signal induced by LPS.The increase in intracellular[Ca2+]i was associated with increased ROS production which was abolished in the presence of lipoxin A4.Conclusions These findings indicate that the LPS-indueed intracellular[Ca2*]i increase depends on the Ca2+entry through SOC channel,and lipoxin A4 inhibits Ca2+ influx and ROS production through SOC channel in ratine maerophages induced by LPS.

OBJECTIVETo provide a new material for producing the Rhodiolasachalinensis products, the effect of methyl jasmonate (MeJA) on callus biomass and effective compound accumulation of Rhodiolasachalinensis was studied.

METHODThe calluses-cultured in 3 L-air lift balloon type bioreactor were treated with MeJA after 20 d of bioreactor culture and the effect of MeJA concentration and treatment days on callus biomass, salidroside or polysaccharide accumulation and superoxide dismutase (SOD) and peroxidase (POD) activities were investigated.

RESULTThe callus biomass was not significantly different after MeJA treatment (125) for 0-6 d but obviously decreased after 6 d treatment. The maximum salidroside or polysaccharide contents and SOD or POD activities were found after 4 d treatment of MeJA. MeJA concentration significantly affected callus biomass and effective compound accumulation, biomass decreased at MeJA concentrations higher than 125 μmol x L(-1). However, the effective compound contents were determined at higher MeJA concentration, and the highest salidroside and polysaccharide accumulation was found at 225 and 275 μmol x L(-1) MeJA, respectively and the maximum SOD and POD activities was found at 225 μmol x L(-1) MeJA. The effective compound contents in callus were compared with field-grown plants. Salidroside contents in calluses were 1.1-fold and 2. 4-fold more than in plant roots and stem or leave, respectively. Polysaccharide content in calluses were 3. 6-fold and 8.0-fold more than in plant roots and stem or leave, respectively.

CONCLUSIONSalidorside and polysaccharide in Rhodiolasachalinensiscalluses improved by MeJA treatment, 225 μmol x L(-1) MeJA and 4 d treatment were optimal. The effective compound contents in callus were obviously higher than in field-grown plants. Therefore, bioreactor culture is efficient for obtaining mass effective compounds of Rhodiolasachalinensis by culturing calluses. This method could provide an alternative material source for production of Rhodiolasachalinensis products.

Acetates ; pharmacology ; Biomass ; Bioreactors ; Cyclopentanes ; pharmacology ; Glucosides ; metabolism ; Oxylipins ; pharmacology ; Peroxidase ; metabolism ; Phenols ; metabolism ; Polysaccharides ; metabolism ; Rhodiola ; metabolism ; Superoxide Dismutase ; metabolism

Objective To study the protective role of pre-resolving mediator lipoxin A4(LXA4) in the NA+ -K+-ATPase in alveolar type Ⅱ (AT Ⅱ ) epithelial cells of rats exposed to lipopolysaccharide (LPS). Method The AT Ⅱ cells were isolated and purified, and divided randomly into control group (PBS), vehiculum (alcohol 0.7 μL/mL) group, LPS (1 μg/mL) group, LXA4(1/10 mol/mL) group and LPS (1 μg/mL LPS) + LXA4(1/10 mol/mL) group. After exposure to LPS and/or LXA4 for4 hours, NA+-K+ -ATPase and β1-subunits mRNA in AT Ⅱ epithelial cells were detected by using RT-PCR, and ATP, ADP, AMP, total adenine nucleotides (TAN) and energy charge (EC) were measured by using high performance liquid chromatography (HPLC), and then the activities of Na+-K+-ATPase were calculated accordingly. Results The NA+-K+-ATPase α-subunit and β-subunit mRNA were significantly decreased in LPS group ( P ＜ 0.05 vs. control group). However, the expressions of NA+ -K+-ATPase mRNA were significantly enhanced by application of LXA4 to AT Ⅱ epithelial cells exposed to LPS (P ＜0.05 vs. LPS group). The activities of NA+ -K+ -ATPase were enhanced in LPS group (P ＜0.05 vs. control group). Compared with control group and LPS group, the activities of NA+-K+-ATpase in LPS + LXA4 group were significantly increased (P ＜0.01 vs. control group; P ＜0.05 vs. LPS group). The EC of AT Ⅱ epithelial cells were higher in LPS group ( P ＜ 0.01 vs. control group). There were no significant differences in EC between control group and LPS + LXA4group(P ＞0.05). Conclusions The pro-resolving mediator LXA4 can enhance the expressions of NA + -K + -ATPase α-subunit and β-subunit mRNA, and the activities of NA + -K + -ATPase in AT Ⅱ epithelial cells or rats exposed to LPS, and ca also balance the metabolism of AT Ⅱ epithelial cells. These findings suggest that LXA4 plays an important role in lung edema clearance in lung injury induced by endotoxin, and the role is likely associated with the enhancement of the expressions of Na+ -K+ -AT-Pase α-subunit and β-subunit, and the activities of Na+ -K* -ATPase, maintaining the balance of metabolism of AT Ⅱ epithelial cells.

OBJECTIVETo understand the changing trend on the way of delivery since 1970s and its related factors that influencing the attitude of choice on Cesarean section (C-section) in women at child-bearing age.

METHODSA face-to-face interview was conducted anonymously in pregnant and lying-in women visited at the out-patient department of Gynecology and Obstetrics, Tiantan Hospital of Beijing. Totally, 415 women at child-bearing age, with a history of previous birth were interviewed on date, place and way of delivery of last birth, as well as on information that could have had impact on the choice of C-section.

RESULTSThe average rate of C-section in Tiantan Hospital had been 29% since the year of 2000, much higher than that during 1970s, 1980s and 1990s (chi(2) = 22.81, P = 0.001) which showed an increasing trend. Rate of C-section among lying-in women with native Beijing origin was 25.0%, significantly higher than 9.6% (chi(2) = 21.96, P = 0.000 002) that in the migrants. Lying-in women with education level of high school or above had higher chance to choose C-section than those with lower level of education (chi(2) = 43.64, P < 0.000 01). Workers, managerial staff or clerks had more chance to choose C-section than those with other occupations (chi(2) = 20.07, P = 0.01). As reported by the interviewees, 93% (70/75) of C-section in the hospital were performed and recommended by obstetricians.

CONCLUSIONRate of C-section in the hospital showed an increasing trend which suggested that intervention with health education be carried out for both pregnant women and obstetricians.

Adult ; Cesarean Section ; statistics & numerical data ; China ; epidemiology ; Delivery, Obstetric ; statistics & numerical data ; Female ; Humans ; Pregnancy ; Surveys and Questionnaires

OBJECTIVEAmbroxol induces the synthesis of surfactant in lung alveolar type II cells. Some studies have shown its effectiveness for the prevention of respiratory distress syndrome (RDS) in preterm infants. This study aimed to compare the efficacy of two different ways of ambroxol administration, ie, intravenous injection and atomizing inhalation, for the prevention of RDS in preterm infants.

METHODSA total of 125 preterm infants born between 28-37 weeks of gestation were randomly assigned into three groups: Intravenous and Atomizing ambroxol treatment groups (n=40 each) or Control group (n=45). The Intravenous group was injected with 15 mg/kg of ambroxol through the umbilical vein immediately after birth and then received 30 mg/kg of ambroxol daily for 2 days by intravenous drip. The Atomizing group was administered with 30 mg/kg of ambroxol daily for 2 days by atomizing inhalation immediately after birth. The Control group received no ambroxol treatment. The incidences of RDS and complications as well as the blood gas results 6 hrs after birth were compared among the three groups.

RESULTSThe incidence of RDS was 7.5%, 5.0% and 24.4% in the Intravenous, Atomizing and Control groups respectively. There were no significant differences in the incidence of RDS between the two ambroxol treatment groups. However, the incidence of RDS in the two treatment groups were noticeably lower than in the Control group (P < 0.05). The blood gas results did not show significant differences between the two ambroxol treatment groups but both groups demonstrated improved blood gas results compared with the Control group at 6 hrs after birth (P < 0.05). The incidence of complications, such as pulmonary hemorrhage, respiratory failure, intraranial hemorrhage, in the two ambroxol treatment groups was reduced compared with the Control group (P < 0.05), but there were no differences between the two ambroxol groups.

CONCLUSIONSEarly administration of either intravenous or atomizing ambroxol can produce a positive efficacy for the prevention of RDS in preterm infants. The two different ways of administration seem to result in a similar efficacy in the prevention of RDS.

Administration, Inhalation ; Ambroxol ; administration & dosage ; adverse effects ; pharmacology ; Female ; Humans ; Infant, Newborn ; Infant, Premature ; Injections, Intravenous ; Male ; Pulmonary Surfactants ; metabolism ; Respiratory Distress Syndrome, Newborn ; prevention & control

Objective To analyze obese children serum lipid level in order to understand the relationship between serum lipid and cardiovascular disease in obese children.Methods One hundred and fifty-three children(109 male and 44 female)aged 4-16 years old with obesity who attended the outpatient clinic of Beijing Children′s Hospital were collected.Percentage body fat (%BF),body fat (BF),fat-free mass (FFM) was estimated by using bioelectrical impedance analysis (BIA) and calculate.Waist and hip circumference,waist-to-hip ratio (WHR) was estimated by soft tape measure and calculate.Skinfold thickness of scapular bone below (S) and triceps muscle (T),S/T rate was estimated by skin fold meter and calculate.Serum total cholesterol (TC),triglyceride(TG),high density lipoprotein(HDL-C),low density lipoprotein(LDL-C),apolipoprotein(Apo) AI and Apo B levels were also measured.SPSS 11.0 software was used to analyzed the data.Results The cardiovascular disease related was the prevalence of high TC levels(3.3%)or high LDL-C level(6.0%) and high TG level(24.7%) was rather low.HDL-C level was reduced in 31.3% of obese children.In children over 10 years old,%BW and %BF showed a weak correlation with HDL-C(r=-0.202,-0.211).Conclusions In obese children,serum lipid as well as Apo level should be exa-mined in order to evaluate angiocardiopathy.

Objective To investigate the expression and significance of Caspase-3 and Survivin at different stages of human hemangioma in children.Methods Fifty-five specimens of hemangioma tissue excised in operation and 8 normal skins removed in operation were harvested from People's Hospital of Gansu Province between Jan.2000 and Dec.2005.The pathologic diagnosis was divided into 3 groups according to Mulliken's standard under microscope:proliferated phase group(n=31),degenerated phase group(n=24),and control group(n=8).All these specimens were examined by immunohisto for Caspase-3 and Survivin expression.Results Caspase-3 positive rate in the proliferative phase and involuting phase were 35.5% and 79.2%,respectively.The positive rate in involuting phase was higher than that that in proliferative phase,the difference between the 2 groups was significant(P=0.045 9).A significant difference was not found between the proliferative phase and normal skin tissue(P=0.057 3).Survivin positive rate in the proliferating and involuting phase were 77.4% and 45.8%,respectively.The positive rate in proliferative phase was higher than that in involuting phase,the difference between the 2 groups was significant(P=0.008 5),the difference in involuting phase and normal skin tissue was not significant(P=0.059 3).Conclusions High level of Caspase-3 expression in vascular endothelial cells in involuting phase in contrast to that in proliferative phase,which indicates that Caspase-3 may play a positive role in the apoptosis of vascular endothelial cells.Survivin may inhibit the apoptosis of vascular endothelial cells in proliferative phase due to it's high expression.Caspase-3 and Surivivin involved in the hemangioma in the regulation of apoptosis.J Appl Clin Pediatr,2009,24(1):51-52

Communicable Diseases ; epidemiology ; Disease Outbreaks ; Humans ; Population Surveillance ; methods