Objective To observe the effect of nerve growth factor(NGF) on Caspase-3 expression in hippocampus of epileptic rats induced by kainic acid(KA) and explore the protective effect and mechanisms of NGF on the epileptic neurocytes.Methods Sixty healthy rats aged 21 to 30 days were randomly divided into 3 groups,each of which included 20 rats.Rats in group A were treated with 9 g?L-1 sodium,rats in group B were treated with KA,rats in group C were treated with KA and NGF.Concentration of KA was 2 g?L-1 diluted by 9 g?L-1 sodium;KA was injected into rats in group B and group C,intraperitoneally.Then state of seizure was recorded,and EEG and pathological section were performed.Five rats in each group were sacrificed by perfusion with paraform respectively at 6 hour,on the 1st day,on the 3rd day after injection of KA.Specimen was sampled and made into frozen section.Expression of Caspase-3 in hippocampus of epileptic rats was analyzed by immunohistochemistry.And microscope image measuring and analysis instrument was used to analyze image of expression.Results Symptoms of seizure appeared 30 min after injection of KA.Seizure was proved by detection of EEG and pathological section.Expressions of Caspase-3 detected by immunohistochemistry in group C decreased at every time spot were higher than those in group B,and the defferences between 2 groups had statistically significant(Pa

Objective To demonstrate the association between fluid intake and sodium intake during the first 10 days of life and the risk of chronic lung disease (CLD) in very low birth weight (VLBW) infants.Methods A retrospective analysis of data from VLBW infants enrolled in the Neonatal Department of our hospital; 130 infants with birth weight between 790 and 1 470 g were randomized, among which 12 infants was diagnosised CLD. The daily fluid intake and sodium intake during the first 10 days of life were compared between the infants without CLD and those who developed CLD. Demographic and clinical neonatal variables were also compared. Results 118 infants survived without CLD and 12 infants developed CLD. Analysis showed that the daily fluid intakes were higher (day 2～10) and weight loss less (day 6～9) in the group of infants who developed CLD. In addition, the daily sodium intakes were also higher (day 2～6) in infants who developed CLD. Conclusion In the VLBW infants treated during the post surfactant era, higher fluid or sodi-um intake during the first 10 days of life were associated with an increased risk of CLD. The finding suggests that careful attention to fluid balance might be an important means to reduce the incidence of CLD.

Child ; Child, Preschool ; Contrast Media ; adverse effects ; Coronary Angiography ; Female ; Humans ; Infant ; Iohexol ; adverse effects ; Kidney ; drug effects ; physiology ; Male ; beta 2-Microglobulin ; urine

Objective To study the biological characteristics of dendritic cells (DCs) derived from peripheral blood mononuclear cells (PBMCs) of patients diagnosed with syphilis. Methods PBMCs were isolated from 16 patients clinically and serologically diagnosed with syphilis, and from 16 healthy human controls, then cultured with GM-CSF and IL-4. On day 10, the monocyte-derived dendritic cells (MoDCs)of the patients and controls were collected and subjected to the detection of surface molecules by flow cytometry; TpN17 was used to stimulate MoDCs from the controls, the expression of phosphorylated ERK was detected by Westem blotting 20 minutes following the stimulation. Results The positivity rate of CD80 was significantly increased in the patients with syphilis than that in the controls (51.90% vs 33.67,P ＜ 0.05), while no significant difference was observed in the expressions of CD83, CD86 or HLA-DR be tween the two groups (16.53% vs 15.99%, 66.13% vs 59.32%, 91.29% vs 90.51%, all P 0.05). The ex pressions of CD80 and CD83 on the surface of MoDCs were enhanced in a dose-dependent manner after ex-posure to TpN17. The expression of cytoplasmic phosphorylated ERK was observed in MoDC stimulated by TpN17, but not in those without the treatment. Conclusions Antigenic stimulation with Treponema pal-lidum may be a reason for phenotypic abnormality of MoDCs derived from patients with syphilis. TpN17 may stimulate the maturation of DCs through the ERK signal transduction pathway.

Langerhans cell histiocytosis is an uncommon disease, involvement of the thyroid by langerhans cell histiocytosis is rare. Two cases of Langerhans cell histiocytosis of the thyroid confirmed by pathology were reported in this paper. The main clinical feature was enlargement of the thyroids. One patient had hypothyroidism. Meanwhile, the lungs and pituitaries of the two patients were affected. Langerhans cell histiocytosis of the thyroid had no typical symptoms and specific laboratory examination, and might be clinically diagnosed as chronic lymphocytic thyroiditis, benign or malignant thyroid tumors. Thyroid fine needle aspiration cytology might be useful in confirming the diagnosis. The effective treatments include systemic chemotherapy, local radiation therapy and surgical excision. The chemotherapy is still the major technological approach. Most patients can relieve partially after receiving the systemic chemotherapy.

ObjectiveTo analysis the subsets of the lymphocyte and dendritic cells (DC) in peripheral blood in patients with neurosyphilis and investigate the relationship between these cells and onset of neurosyphilis.MethodsThe subsets of CD4+T cells as well as DCs and the counts of CD4+T and CD8+T were analyzed by flow cytometry with immunofluorescent staining in 8 patients with neurosyphilis and 10 healthy controls.ResultsIn peripheral blood of neurosyphilis patients the proportion of CD4+T cell was significantly higher than that in the normal controls ( P<0.01); the proportion of CD8+T cell was significantly lower than that in the normal controls ( P<0.05). The proportion of Th1, Th2 and the ratio of Th1/Th2 in neurosyphilis patients was (14.12±5.12)%, (1.52±0.88)% and (12.05±5.62), respectively. In normal controls, it was (26.10±4.98)%, (0.99±0.35)% and (31.62±16.62) respectively. The expression of Th1 and the ratio of Th1/Th2 in neurosyphilis patients was significantly lower than the normal controls (P<0.05). The proportion of DC1 and DC2 in neurosyphilis patients was not significantly different from that in normal controls ( P>0.05). There was a significant correlation between DC1 and Th1, DC2 and Th2 in the neurosyphilis patients ( P<0.051), but no correlation between the proportion of DCs and the ratio of Th1/Th2 ( P>0.05).ConclusionThe cellular immune function of neurosyphilis patients may be inhibited, and there is no relationship between the proportion of DCs subset and unbalance of Th1/Th2.

Objective To investigate the current situation of radiation protection in nuclear medicine diagnosis workplace.Methods The study was performed in 3 hospitals in northeast,north and central of China from February to December in 2013.The γ dose rate instrument was used to detect the workplace ambient dose equivalent rate of medicine preparation,leaching,packing,injection and imaging.Individual effective dose and equivalent dose were evaluated by photoluminescent dosimeter.Results The ambient dose equivalent rate was up to 1.92 mSv/h at repacking place and 1.2 mSv/h at injection place.The ambient dose equivalent rate of patients after injection was 5.36-240 μ,Sv/h.The hand equivalent dose was 0.01-0.02 mGy.Moreover,there were problems of staff route intersection,as well as the patients after injection staying in the public area.Conclusions Radiation workers should pay more attention to individual protection,and improve the operation proficiency to shorten the operation time.Furthermore,in order to protect public from unnecessary irradiation,there should be some changes in staff route and patients administration.

Objective To use Monte Carlo method to build a shielding calculation model for the proton and heavy ion treatment room,and to provide a reliable calculation method for shielding design.Methods A Monte Carlo-based FLUKA code was adopted to build the shielding calculation model for the proton and heavy ion treatment room,and to simulate the radiation field distribution in the proton and heavy ion treatment room.The calculation model was verified through the radiation detection around the proton and heavy ions treatment room.Results The FLUKA code-based simulation results were consistent with the radiation detection.Conclusions The shielding calculation model based on FLUKA code can simulate the radiation field from proton and heavy ions.Among the secondary particles,secondary neutrons are the dominant component and the main concern of accelerator shielding design.In shielding calculation,the emphasis should be put on both beam intensity and energy.

Objective To measure the circuit time constants of 4 kinds of radiation survey meters (451P ionization chamber dosimeter,6150AD6 + 6150AD-b dose meter,FH40G + FHZ672E-10 dose meter and AT1123 dose meter) and,to discuss the formula of time response correction and its application.Methods In the condition of continuous exposure of X-ray machine,the ambient dose equivalent rates shown by survey meters were recorded.In order to get the circuits time constant,the least squares fittingmethod was used to fit the data using the time response formula of circuit having a capacitance C and a resistance R in series.Results The relative uncertainty of fitted circuit time constants was higher than 20％ except for 6150AD6 + 6150AD-b dose meter.The relative uncertainty of fitted r was 8％ for 6150AD6 + 6150AD-b dose meter.Conclusions The time required to stabilize the dosimeter readings was 8,5,3 and 2 s,respectively,for the 451P ionization chamber dosimeter,6150AD6 +6150AD-b dose meter,FH40G + FHZ672E-10 dose meter and AT1123 dose meter.The rising trend of their measured values was not fully accordance with the RC circuit time response correction formula.

Objective To discuss the methods of selecting different shapes occluder and to evaluate the feasibility,safety and efficacy of them in transcatheter closures of congenital ventricular septal defect (VSD) in children.Methods Transcatheter closures were performed in 226 children with congenital VSD,age ranging from 2 to 14 years(mean 5.62 years) under the guidance of transthoracic echocardiography(TTE) and fluoroscopy.There were 14 patients with intracristal VSD,209 patients with perimembranous VSD and 3 patients with muscular VSD.Left ventriculography and transthoracic echocardiography were performed repeatedly after the procedure to assess the effect of occlusion.The echocardiography and electrocardiography were scheduled before discharge,1,6 and 12 months for the follow-up.Results The occluders were deployed successfully in 211 patients.The successful rate was 93.4%.Thin waist shape occluders,were deployed in 7 patients;equal side shape occluders,were deployed in 191 patients;eccentric shape occluders were deployed in 12 patients,and muscular defect occluders were deployed in 1 patient.There were no complications encountered during or after closure.Conclusions It is very important in transcatheter closure of congenital in children to select different shape occluder according to pathologic characteristics.In general,equal side shape occluder is suita-ble for a large number of defect and it is easy for deployment.In some conditions,the other shape occluder may be necessary.