Objective To investigate the effects of vasoactive intestinal peptide on transforming growth factor-β1(TGF-β1)expression in lung tis-sue of asthmatic mice with airway remodeling. Methods A total of 30 SPF grade female Balb/c mice were randomly divided into three groups:con-trol(group A),asthmatic(group B),and vasoactive intestinal peptide treatment(group C). Aerosolized ovalbumin was used to establish the asth-matic mice model. Pathological changes of bronchial and lung tissues were observed by HE,the perimeter of basement membrane(Pbm),internal wall area(WAi)and smooth muscle area(WAm)in bronchial lung tissue were analyzed using the pathological image. The expression levels of TGF-β1 mRNA and protein in lung tissue were detected by real-time PCR and Western blot. Results Pathologic changes including collagen deposition,in-filtration of inflammatory cells and smooth muscle layer thickness were found in group B. In addition,the WAi/Pbm and WAm/Pbm were significant-ly higher in group B than those of the group A(P<0.05),and lower in group C than in group B(P<0.05). The expression levels of TGF-β1mRNA and protein in group B were higher than both group A(P<0.05)and group C(P<0.05). Conclusion Vasoactive intestinal peptide may inhibit airway remodeling,which may be associated with reduced expression of TGF-β1.

Objective To explore the effects of hydrogen sulfide (H2S) on hyperoxia-induced lung injury in neonatal rats.Methods Eighty full-term Sprague-Dawley rats within 12 hours after birth were randomly divided into control group,hyperoxia group,sodium hydrosulfide (NaHS) + hyperoxia group (NaHS 90 μmol/kg injected intraperitoneally) and propargylglycine (PPG) +hyperoxia group (PPG 50 mg/kg injected intraperitoneally).Except for the control group,the other three groups were exposed to 95％ O2 for seven days.Pulmonary histopathology was observed after HE staining,numeration of leukocyte and albumin in bronchoalveolar lavage fluid (BALF) were processed by optical microscope and Lowry methods.The plasma H2S concentration,activity of cystathionine-γ-lyase (CSE) and contents of malondialdehyde (MDA) in lung tissues were also detected.Analysis of variance and LSD-t test were used for statistics.Results (1) Compared with the control group,alveolar hemorrhage,interstitial edema,inflammatory cell infiltration were observed in the hyperoxia group.The number of white blood cells,neutrophils and albumin content in BALF increased in the hyperoxia group [(130.2± 15.3) × 107/L vs (15.1 ±2.5) × 107/L; (64.6± 12.4) × 107/L vs (2.1 ±0.5) × 107/L; (934.6± 106.4) mg/L vs (254.3±50.7) mg/L,respectively.LSD-t=-14.65,5.78 and 2.97,all P＜0.01],but the plasma H2S concentration and the activity of CSE in lung tissue decreased [(112.6± 20.4) μmol/Lvs (182.3±15.7) μ mol/L,LSD-t=-9.90; (3.4±0.4) μmol/ (min·g) vs (6.8± 1.4) μ mol/ (min · g),LSD-t=-4.59; both P＜0.01].However,the contents of MDA increased [(1.7± 0.3) nmol/ml vs (0.9±0.1) nmol/ml,LSD-t=3.03,P＜0.01].(2) Compared with the hyperoxia group,inflammatory exudation and structural disorder of lung tissue were alleviated in the NaHS+hyperoxia group.White blood cells [(56.3± 11.6) × 107/L],neutrophils [(34.8±7.8) × 107/L] and albumin content [(753.8± 89.6) mg/L] in BALF decreased significantly (LSD-t=-9.66,-11.81 and-5.78,P＜0.01).The plasma H2S concentration [(235.7±32.7) μ mol/L] and the activity ofCSE [(5.8± 1.1) μ mol/(min · g)] increased significantly (LSD-t=11.34 and 5.98,P＜0.01) in the NaHS+hyperoxia group.(3) Compared with the hyperoxia group,inflammatory exudation and structural disorder of lung tissue were more severe in PPG+ hyperoxia group.White blood cells,neutrophils and albumin content in BALF increased significantly (LSD-t=5.52,6.37 and 8.23,P＜0.01),the plasma H2S concentration and the activity of CSE decreased (LSD-t=-4.29 and-3.97,P＜0.01),the contents of MDA increased (LSD-t=3.02,P＜0.01).Conclusions H2S is involved in the pathophysiological process of hyperoxia-induced lung injury in neonatal rats.Exogenous H2S can alleviate the pulmonary injury by inhibiting inflammatory reaction and oxidative stress.

Objective To measure the concentration of the amniotic fluid EPO(AFEPO) and investigate the relationship between AFEPO levels and fetal hypoxia. Methods Their AFEPO and the umbilical vein serum EPO (UVSEPO) were measured thirty pregnancy induced hypertension pregnancies (PIH group) , 30 gestational diabetic pregnancies (Diabetic group) and 25 normal pregnancies (control group) were terminated by cesarean section by using a chemiluminescent enzyme labeled immunometric assay (CELIMA). Meantime, umbilical artery pH (UapH), base excess(UaBE) and UapO2 and so on were also measured. Results The mean concentrations of AFEPO and UVSEPO in PIH (1.42?0.33 and 1.63?0.37) and Diabetic group (1.53?0.25 and 1.81? 0.34) were significantly higher than those in control group (0.91?0.11 and 1.13?0.14), ( P

Objective To explore the relationship between the stress during pregnancy and the NMDA-induced spasm. MethodsThe pregnant rats were divided into two groups: pregnant control group(PC group)and pregnatal stress group(PS group). The rats in PS group were forced to swim in cold water of 4℃ for five minutes. Pups of the two groups were injected NMDA 7mg/kg intraperitoneally on postnatal day 13 to induced infantile spasm-like attacks. Then the clinical behavior of pups of the two groups were observed and recorded. The ultrastructure of mitochondria was detected with scanning electron and appearance of neurons was observed with HE staining. NMDA receptor and its subuniforms (NR2A, NR2B) in hippocampus, cerebral cortex, hypothalamus and raphe nucleus of brainstem were estimated by immunohistochemistry. Results The average score of pups in PS group is higher than in PC group(7.84 ±1.01 vs 5.90 ± 1.12). There were swelling neurons and no cytonecrosis in hippocampuss of both two groups. The uhrastructure of mitochondria in hippocampuss and raphe nucleus of brainstem showed great changes in pups of PS group as membrane in mitochondria of pups in PS group. NR1, NR2A and NR2B distributed mainly on the membrane and also in cytoplasm and cellular nucleus. The NR1 expressions in hippocampus, cerebral cortex, hypothalamus and raphe nucleus in pups of PS group were elevated than those of PC group and the P value is 0.001, 0.009, 0.015, 0.001 respectively. The NR2B expressions in hippocampus, cerebral cortex hypothalamus and raphe nucleus in pups of PS group were elevated than those of PC group and the P value is 0.004, 0.002, 0.003, 0.002 separately. NR2A expressed more in hippocampus in pups of PS group than that in PC group,but there was no difference in cerebral cortex, hypothalamus and raphe nucleus between two groups and the P value is separately 0.006,0.067, 0.7, 0.5. Conclusions The mitochondria of neurons in rat pup were hurt by maternal severe stress daring pregnancy, which made the energy metabolism of neurons changed. Maternal stress can also elevate the expression of NR1, NR2A and NR2B in cerebral cortex, brainstem and hippocampus and increase the morbidity of infantile spasm-like attacks.

To find novel antihepatitis drugs, a series of nitrate-oleanolic acid (OA) hybrids (10a, 10b, 11a-11e and 12a-12c) were designed and synthesized on the basis of previous studies using OA as lead compound, which is widely found in natural plants and liver-specific metabolism. In the present study, ten novel NO-releasing derivatives of OA were synthesized by connecting nitrate to the OA-3-OH through varying lengths of linkers containing antioxidants which were designed to increase the ability of these target compounds to scavenge free radicals. The structures of these objective compounds were determined by IR, MS, 1H NMR and elemental analysis. Their protective effects on anti-Fas mediated HepG2 cell apoptosis were in vitro evaluated by LDH assay. Compound 12a is the most potent inhibitor. Its effect on anti-Fas mediated HepG2 cell apoptosis and amount of NO-releasing in vitro are similar to those of positive control NCX-1000.

Objective To discuss the effects of utero placental ischemia on the body and nervous system development in fetal rats Methods By clamping the unilateral uterine artery of the rat, we produced a utero placental ischemia model The opposite uterus of the rat with normal uterine artery supply served as control We compared the body weight, weight of brain, and the expression of growth associated protein 43(GAP 43) mRNA in cerebral tissue by RT PCR in the 13 day (group 1) and 17 day(group 2) old fetal rats respectively Results The body weight and weight of brain in group 1 were 3 2 g and 0 16 g respectively, significantly lower than those of control 1 of 3 6 g and 0 18 g respectively ( P 0 05) However, GAP 43 mRNA in cerebral tissue of the group 2 (1 06) was significantly decreased compared with that of its control(1 21 )( P

The Department of Obstetrics and Gynecology has performed series of teaching reforms for the seven-year medical students.For the theory classes,all the teachers are the senior ones who can enhance the bilingual teaching and combine the clinical cases with the latest development in the subject.We let the interns follow the diagnosis and treatment of the patients just as the patients'relatives.We also let a tutor to guide each intern to help him master the basic clinical art.During the ward inspection for teaching,we let the students be the main speaker,hoping that we can build a new student-centered teaching model.

Objective To study the effects of quantitative 24-hour urinary protein on the thyroid hormone levels in patients with severe preeclamp-sia,and clarify the impact of severe urinary protein on hypothyroid in severe preeclampsia patients. Methods A total of 166 patients with severe pre-eclampsia were recruited for the study and divided into mild proteinuria group(2.0-4.9 g/d),midrange group(5-10 g/d)and severe group(>10 g/d)according to the quantitative 24-hour urinary protein. 268 healthy female individuals with normal blood pressure and uric routine in the same stage of pregnancy and of the same age were selected into control group. Serum thyrotropin(TSH),free triiodothyronine(FT3)and free thyroxine (FT4)levels were determined by solid-phase chemiluminescent enzyme immunoassay method(CMIA). The thyroid peroxidase antibody(TPOAb) and thyroglobulin antibody(TGAb)concentration were detected by electrochemiluminescent assay(ECLIA). Results TSH levels were signifi-cantly higher in patients comparing to the control group(P<0.01). In addition,severe group showed higher TSH levels than mild group(P<0.01). FT4 and FT3 levels were obviously decreased with the progression of the disease(P<0.01 and P<0.05). The positive rate of TPOAb in mild group was significantly higher than that in moderate group(OR=9.8,P<0.05). There was no significant difference of the TGAb positive rate among three patient groups(P>0.05). The incidence of subclinical hypothyroidism and clinical hypothyroidism in severe group was significantly higher than that in mild group and in control group(OR=2.5,P<0.05 and OR=9.0,P<0.05;OR=8.0,P<0.01 and OR=43.4,P<0.01). Conclusion Our re-sults indicated that 24-hour urine protein in severe preeclampsia patients has extensive effects on thyroid hormones levels. With the increasing of quantitative 24-hour urinary protein,the level of TSH increased and the FT4 decreased. Thyroid autoantibody positiveness has extensive effects on 24- hour urine protein. Incidence of hypothyroid increased with the increase of quantitative 24-hour urinary protein. 24-hour urinary protein quantitative was a risk factor for hypothyroidism in severe preeclampsia patients. More attention should be paid to the monitoring of 24-hour urinary protein in se-vere preeclampsia patients.

Objective To study the fetal developmental regulation and gestational weeks at labor for triplets pregnancies Methods To detect biparietal diameters and femoral length at different gestational weeks, record gestational weeks of labor and birth weights, and compare with those of singletons Results The fetal development of triplets slowed down from the beginning of the 28th gestational week compared with that of singletons (the mean difference was 2 1mm and 3 1 mm respectively, P

Objective:To investigate the efficacy and safety of less invasive surfactant administration(LISA) of neonatal respiratory distress syndrome(NRDS).Methods:From July 2017 to December 2018, 50 premature infants with birth weight ≤1 500 g and/or gestational age≤32 weeks diagnosed as NRDS at the Fifth Medical Center of PLA General Hospital were randomly divided into LISA group( n=25)and INSURE group( n=25). The patients in LISA group was inserted fine duct into the trachea through direct laryngoscope under nasal continuous positive airway pressure (nCPAP) and pulmonary surfactant was injected.The INSURE group adopts endotracheal intubation-pulmonary surfactant-nCPAP was performed after unplugging.The changes of vital signs, blood gas indexes, adverse reactions and the incidence of complications were compared between two groups at different time points. Results:There was no significant difference in respiration, heart rate, systolic blood pressure, diastolic blood pressure and PaO 2, PaCO 2, BE, SpO 2 between two groups at different administration time points.Although the pH value of LISA group was lower than that of INSURE group, it was within the normal range.There was no significant difference in bronchopulmonary dysplasia, intraventricular hemorrhage, periventricular leucomalacia and other complications between two groups, and there was no death, air leakage, retinopathy of prematurity and pulmonary hemorrhage in both two groups.In addition, there was no significant difference in hospitalization days, total medical expenses, oxygen use time between the two groups(all P>0.05). Conclusion:Compared with INSURE technology, LISA technology has its feasibility for premature infants with NRDS, but the effectiveness and safety in the practical application need to be further confirmed.