Aim To study the distributive character of mitomycin(MMC) magnetic nanoparticles and MMC normal saline solution in mice.Methods A HPLC method for the determination of MMC in tissues and serum were established and applied to determine MMC in biological samples.Results Under the guidance of an external magnetic field,targeting rates of MMC to liver viscus are 82.72% after 30 minutes tail vein administration of(1 mg?kg~(-1)) mitomycin magnetic nanoparticles,it was 2.37 times larger than targeting rates of MMC normal saline solution group.The distributions of heart and kidney of mitomycin magnetic nanoparticles were less than that of MMC normal saline solution group.Compared with the results of tail vein administration mitomycin nanoparticles,interaction between the external magnetic field and magnetic nanoparticles is significantly effective to increase targeting rates of MMC to liver.Compared with the results of tail vein administration mitomycin magnetic nanoparticles without the external magnetic field,Mitomycin magnetic nanoparticles under the guidance of an external magnetic field is significantly effective to increase targeting rates of MMC to liver.Conclusions Mitomycin magnetic nanoparticles under the guidance of an external magnetic field is significantly effective to increase targeting rates of MMC to liver and prolonging effect on the action in vivo.

BACKGROUND:Peri-fracture nerve injury can inhibit osteoclast activity and promote early fracture healing. OBJECTIVE:To investigate dynamical y the effects of traumatic brain injury on the bone mineral density, microstructure, biomechanics property and bone metabolism in rat models of fractures. METHODS:Sixty-three male rats were randomly divided into three groups:sham group, simple fracture group and fracture combined with brain injury group. After 3, 6, and 3 months, the animals were sacrificed in batches under anesthesia, and then, the bones and serum specimens were used to detect the bone mineral density, microstructure, biomechanics property, serum cross-linked N-telopeptide of col agen type I and osteocalcin levels. RESULTS AND CONCLUSION:Compared with the simple fracture group, the fracture combined brain injury group had significantly increased bone mineral density of the proximal tibia, bone volume fraction of the cancel ous bone, trabecular thickness, cross-sectional area of tibial cortical bone and total area of the bone marrow, ultimate load and stress of the tibia, serum cross-linked N-telopeptide of col agen type I and osteocalcin levels at 3 and 6 weeks after modeling (P<0.05), but no differences in the above-mentioned indexes were found among the three groups at 3 months after modeling. These findings indicate that traumatic brain injury can increase the bone mineral density at the fracture site, improve bone microstructure and enhance biomechanical properties, thereby promoting bone healing and bone metabolism at the fracture site.

Objective:To analyze the feature of anaphylactic shock induced by alprostadil injection. Methods: Totally 1624 pa-tients treated with alprostadil injection in our hospital from January to March 2014 were undergone adverse drug reaction monitoring. Six cases of anaphylactic shock induced by alprostadil injection were statistically analyzed. Results:6 cases of anaphylactic shock induced by alprostadil injection occurred in the department of intervention and most of thd reaction happened in arterial injection. Two lot num-ber of drugs were in high frequency. Patients showed a sharp fall in blood pressure, chest discomfor, palpitation, shortness of breath, paleness, sweating and other symptoms. After anti allergy, blood pressure, oxygen the rapy and other treatment measures vital signs gradully stabilized. Conclusion:Anaphylactic shock induced by alprostadil injection is in correlation with the administration mode of artery injection. The change of the patient' s condition and vital signs should be closely observed when we inject the patient with alpros-tadil injection. We must prevent the occurrence of serious adverse reactions.

Objective To investigate the effect of Acanthopanax senticosus saponin (ASS)on the protein and mRNA expression of vascular endothelial growth factor (VEGF) in human HepG2. Methods HepG2 were incubated with ASS,the expression of VEGF was detected by ELISA assay,and the mRNA expression of VEGF was detected by RT-PCR assay. Results ASS (250,500 ?g/mL) decreased the expression of VEGF protein and VEGF mRNA (P

Objective To observe the effects of rehabilitation in the 55 prelingually deaf pediatric cases for two years after cochlear implantation ,factors including cochlear implantation and recovery time ;to compare the re-covery effects in the group of 1 to 3 years old children with the group of 3~5 years old (including the age of 3 years old) who lost their hearing before learning to speak ,and to provide clinical evidence for providing cochlear implant therapy to the prelingually deaf children as early as possible .Methods A total of 55 pediatric relingually deaf cases were included in this study .According to their implantation time and application duration ,they were divided into 2 groups :1 to 3 years old group (32 cases) ,and >3 to 5 years old group (23 cases) respectively .The hearing ,lan-guage and learning abilities on 1 ,3 ,6 ,12 ,18 ,24 months after cochlear implantation were evaluated ,using statisti-cal method to record CAP and SIR scores .Results The rehabilitation effects ,the average ages ,CAP ,speech rec-ognition rates and SIR were increased two years afterwards .The effects of younger age group were more noticeable than that in the older group .The differences between the two groups were statistically significant (P<0 .05) .Av-erage speech recognition rates ,average speech rehabilitation effects in each postoperative period of younger age group were better than those of in older age group ,showing significant differences (P<0 .05);CAPs in the younger age group on 1 ,3 and 12 months after CI surgery were significantly higher than those of in the older group (P value were 0 .001 ,0 .001 and 0 .002 ,respectively) .SIR in the younger age group at the time of 1 ,3 ,12 ,24 months were significantly higher than those of in the older group(P values were 0 .00 ,0 .00 ,0 .00 and 0 .024 ,respectively) . Conclusion Implanted age and recovery time are the key factors that influence the effects of postoperative rehabilita-tion .The younger when the children get cochlear implantation and the longer the recovery time takes during two years after cochlear implantation ,the better the results are .The standardization of domestic assessment for the re-covery effects and the international evaluation method have a certain degree of equivalence .

Objective To raise the awareness of congenital ornithine transcarbamylase deficiency (OTCD) by analyzing the clinical features and the family pedigree in a child with OTCD.Methods Clinical characteristics were analyzed in a child with OTCD.The genetic analysis was performed in ten exons and nine intron-exon boundaries in the ornithine transcarbamylase (OTC) gene of the case and his family by direct sequencing of PCR-DNA from peripheral blood.Family history including his grandparents and uncle was registered.Results The onset age of the case was 6 months old,the clinical picture was characterized by recurrent episodes of vomiting,low spirits,hyperammonemia,and abnormal liver function.His brother died of the similar performance at 6 months old.His sister was healthy.IVS1-2A＞G intron mutation of OTC gene was found in the case,while his mother and sister were the carriers and his father revealed no mutation.His maternal grandparents and his uncle's family were healthy.Conclusion OTCD is a kind of congenital genetic disease,and is one of the main causes of hyperammonemia.Misdiagnosis is very common because clinical symptoms of this disease are variable.IVS1-2A＞G mutation in OTC gene is the pathogeny of this case.The family genealogy indicates that this case is a kind of X-linked recessive hereditary disease.

ObjectiveTo understand the feature of blood pressure in children aged 7 to 12 years in Zhengzhou.Methods According to stratiifed cluster random sampling method, children aged 7 to 12 years in ifve schools from three urban and two suburban counties in Zhengzhou were analyzed. The height, weight, waist circumference, hip circumference, systolic blood pressure (SBP), and diastolic blood pressure (DBP) were measured and analyzed.Results The survey included total 6460 children aged 7 to 12 years, 3206 urban children (49.63%), 3254 suburban children (50.37%), 3525 boys (54.57%) and 2935 girls (45.43%). SBP in boys [(117.86±18.18) mmHg] was signiifcantly higher than that in girls [(113.82±13.11) mmHg (t=3.16;P=0.002). The incidence of hypertension in children in Zhengzhou was 7.52%. The blood pressure in boys was higher than that in girls (χ2=9.66,P=0.002). The blood pressure in urban boys and girls was higher than that in suburban boys and girls respectively (χ2=24.15, 14.39;P=0.000). The SBP and DBP had positive correlation with age, height, weight, BMI, waist circumference in boys (P<0.01). The SBP had positive correlation with age, height, weight, BMI, waist circumference in girls (P<0.01). Conclusions The blood pressure is higher in boys than in girls, which also is higher in urban children than in suburban children in Zhengzhou. The SBP is related to the age, height, weight, BMI, waist circumference.

Objective To evaluate the application of the inlay butterfly cartilage graft technique in myringoplasty.Methods Thirty--eight ears in 38 patients (experiment group) with dry central drum perforations were treated with inlay butterfly cartilage myringoplasty,and 46 ears in 46 patients with underlay temporalis fascia myringoplasty (control group).Results After a mean follow-up of 6 months,the healing rate did not differ between two groups (92.1% in experiment group,91.3% in control group,P＞ 0.05).Average pure-tone hearing threshold improved than 10 dB and closure of the air-bone gap (ABG) within 10 dB were not different (P ＞ 0.05).The cured patients were followed up for 12-38 months,there was no ear perforation of drum in experiment group,but 4 ears in control group.Condusion Inlay butterfly cartilage myringoplasty is the reliable and ideal method for tzeating dry central drum pedoration with high success rate.

To study the chemical constituents of K. oblongifolia, silica gel column chromatography, MCI and Sephadex LH-20 were used to separate the 70% acetone extract of the stems of K. oblongifolia. The structures of the isolated compounds have been established on the basis of physicochemical and NMR spectroscopic evidence as well as ESI-MS in some cases. Twenty compounds were obtained and identified as heteroclitalignan A (1), kadsulignan F (2), kadoblongifolin C (3), schizanrin F (4), heteroclitalignan C (5), kadsurarin (6), kadsulignan O (7), eburicol (8), meso-dihydroguaiaretic acid (9), kadsufolin A (10), tiegusanin M (11), heteroclitin B (12), (7'S)-parabenzlactone (13), angeloylbinankadsurin B (14), propinquain H (15), quercetin (16), kadsulignan P (17), schizanrin G (18), micrandilactone C (19) and (-)-shikimic acid (20). Compouds 1, 5, 8, 11-15, 18 and 20 were isolated from this plant for the first time. Toxicity of compounds 1-10 were evaluated with zebrafish model to observe the effect on its embryonic development and heart function. The results showed that compounds 7, 9 and 10 caused edema of zebrafish embryo and decreased the heart rate of zebrafish, which exhibited interference effect on heart development of zebrafish.

0.05).The blood loss in harmonic scalpel group was less than that in titanium clamp group or conventional group(P=0.001).CONCLUSION Harmonic scalpel is a new type of surgical instrument and is suitable for endoscopic thyroid surgery.It is worth of recommending that harmonic scalpel can not only increase safety of surgery and reduce blood loss,but also decrease the difficulty of operation and shorten the operation time.