Objective To probe into the medical cost and economic losses of childhood asthma. Methods Total 200 of asthmatic children aged 2~16 yrs were diagnosed according to asthma OPD and enrolled in this study from the Affiliated Hospital of Medical College of Qingdao University during 2005—2006. All of them were taken the epidemiologic and economic survey. Results Among them, 184 were from kindergartens, primary or middle schools. There were totally 7 629 days for the asthmatic children absent from class per year because of illness. The overall direct economic loss was RMB 798 467.00 and indirect loss was RMB 210 997.80 yearly. Conclusion Asthma not only brings about great impact on children physical and mental health, but also exerts massive economic loss on the society and families. The whole society and medical workers should pay more attention to it and try to reduce its harm to a relatively low level.

Star-shaped block polymers have recently attracted considerable attention owing to their unique properties and applicability in nanomedicine development.Compare to linear polymer and hyper-branched polymers,star-shaped block polymers have more advantages due to the unique structure.Star-shaped block polymer has become a desirable molecular biomaterial for delivery therapeutics and diagnostic agent to the diseased cells.This paper reviews the research about star-shaped block polymers and nanomedicine development in using them as drug and gene delivery carriers.

Objective To explore the methods of cultivating 7-year-program medical students' clinical practice ability and scientific research ability in gynecology. Methods We carried out a training system,in which clinical groups and scientific research groups were guided by tutors,assisted with strict examining measures and reasonable incentive mechanisms. Re-sults According to a practice cycle of 2 years,medical students'overall quality was improved obviously,such as clinical thoughts,basic skills,humanistic qualities,scientific research thoughts and the ability of literature retrieval. Also the teaching enthusiasm and teaching level of the teaching group were improved corresponding. Conclusion Construction and implementation of the training system of clinical groups and scientific research groups under the leadership of the tutors is obviously beneficial to the overall quality of medical students and the integrated teaching capabilities of the professional teaching team.

Objective Mannitol-poly(D,L-lactide-co-glycolide) (M-PLGA),a star-shaped biodegradable polymer,was synthesized with the intent in this research,to provide novel nanoformulation for cervical cancer chemotherapy.Methods The novel star-shaped copolymer was prepared by ring-opening polymerization,and characterized by NMR.The docetaxel-loaded M-PLGA nanoparticles,prepared by modified nano-precipitation method,were observed to be near-spherical shape with narrow size distribution.Results The CLSM results showed the uptake level of M-PLGA NPs was higher than PLGA NPs in Hela cells.A significantly higher level of cytotoxicity was achieved by docetaxel-loaded M-PLGA NPs than that of commercial Taxotere and docetaxel-loaded PLGA NPs,indicating that the star-shaped biodegradable polymer M-PLGA could be superior to the linear polymer PLGA as a drug carrier.The study on drug loading and encapsulation efficiency also proved that star-shaped M-PLGA could carry higher level of drug than linear polymer,therefore could be more efficient for cancer treatment.Conclusions In conclusion,the star-shaped M-PLGA copolymer may be used as a potential and promising drug-loaded biomaterial applied in developing novel nanoformulations for cervical cancer therapy.

Objective To compare the short-term effects and toxicity of one cycle of TPF regimen induction chemotherapy with that of two cycles of PF regimen induction chemotherapy in the N advanced local nasopharyngeal carcinoma (NPC). Methods A total of 47 patients initially treated with N advanced local NPC without distant metastasis from Jan 2007 to Dec 2008 were enrolled in this study. The TPF chemotherapy regimen was administered as follows: TAX 60 mg/m2, i.v. infusion on day 1st, cisplatin 80 mg/m2, i.v. infusion on day 1st and 5-Fu 800 mg/m2, bolus infusion in 96 hours on day lst-4th. The PF chemotherapy regimen was as follows: cisplatin 100 mg/m2, i.v. infusion on day 1 and 5-Fu 1000 mg/m2, bolus infusion in 96 hours on day lst-4th. Twenty-six patients received one cycle of TPF regimen and 21 patients received two cycles of PF regimen, with 21 days each cycle and a total of 3 courses in each group, then chemoradiotherapy with cisplatin 30 mg/m2 (weekly) was followed. Results The short-term efficacy was no significant difference between two groups, after one cycle TPF chemotherapy, the CR+PR rates of primary site and lymph nodes were 57.7 % and 69.2 %, respectively, while after two cycles PF chemotherapy in control group, those were 66.7 % and 71.4 %, respectively (P>0.05). In 3 months after treatment, the CR rates of primary site and lymph nodes in TPF group were 92.3 % and 88.7 %, respectively, while those in control group were 100.0 % and 90.5 %, respectively (P>0.05). The main adverse reactions were Grade Ⅲ-Ⅳ neutropenia and alopecia in TPF group. Conclusion Short-term effects of induction chemotherapy with one cycle of TPF regimen in the N advanced local NPC is satisfied, and the main toxicity is neutropenia.

Background:To date,clinical studies on intravenous rabeprazole sodium for treatment of duodenobulbar ulcer bleeding are still lacking.Aims:To evaluate the efficacy and safety of intravenous rabeprazole sodium with different doses and times of administration in treating patients with duodenobulbar ulcer bleeding.Methods:A multicenter,randomized, double-blind,positive drug parallel-group controlled trial was performed.One hundred and five patients with duodenobulbar ulcer bleeding proved by gastroscopy were randomly divided into four groups.Patients in group A,B and C were treated with intravenous rabeprazole sodium 20 mg qd,40 mg qd and 20 mg bid for 5 days,respectively.Patients in control group received intravenous omeprazole sodium 40 mg bid for 5 days.Hemostatic rate was the primary endpoint,hemostatic time and amount of blood transfusion were the secondary endpoints.Results:Hemostatic rates in group A,B,C and control group were 96.2% (25 /26),92.6% (25 /27),100.0% (26 /26)and 100.0% (26 /26),respectively,no significant difference was seen between the four groups (P >0.05).Median hemostatic time in group A,B,C and control group were 24 (24,72)h,24 (24,72)h,24 (24,48)h and 24 (24,48)h,respectively,no significant difference was seen between the four groups (P >0.05).No patient need blood transfusion during the treatment course.Slight leucopenia was the exclusive adverse effect seen in one case in group C after accomplishment of treatment.Conclusions:Three intravenous rabeprazole sodium regimens with different doses and times of administration were all effective and safe for treatment of mild to moderate duodenobulbar ulcer bleeding.Administration with 20 mg bid seems more effective among the three regimens.

AIM: To study the apoptotic role of wild-type p53 in induction of plaque instability in atherosclerotic rabbits. METHODS: Fifty-four New Zealand White rabbits underwent balloon-induced abdominal aortic wall injury and then were fed on a diet of 1% cholesterol. At the end of the eighth week, the rabbits were randomly divided into two groups: group A and group B. Recombinant adenovirus carrying p53 and ?-galactosidase (LacZ) genes were injected in group A and B, respectively. Two weeks later, 10 rabbits each in group A and B was killed and the remaining rabbits all underwent pharmacological triggering with injection of Chinese Russell's viper venom and histamine. RESULTS: Compared with group B, p53 gene over-expression in group A resulted in a marked increase in number of positive apoptotic cells (2.5%?0.8% vs 1.0%?0.3%, P

Objective:To explore the correlations between 11C-2β-carbomethoxy-3β-(4-fluorophenyl)tropane (CFT) microPET/CT imaging and the degree of damage to dopamine neurons in the substantia nigra of midbrain and the severity of Parkinson′s disease (PD). Methods:Sixty male Sprague-Dawley (SD) rats were divided into PD model group ( n=48) and control group ( n=12) by random number table method. The PD model was established by injecting 6-hydroxydopamine (6-OHDA) into the right striatum. The rotational behavior test and 11C-CFT microPET/CT imaging were performed at 1, 2, 3 and 4 weeks after the establishment of PD model. The radioactivity uptake values of bilateral striatum were analyzed and the radioactivity uptake ratio of injured side to healthy side was calculated. The number of tyrosine hydroxylase (TH) immunoreactive positive neurons in the pars compacta of substantia nigra was counted by immunofluorescence staining, and the ratio of total number of TH positive neurons in injured side to healthy side was calculated. Data were analyzed by one-way analysis of variance, the least significant difference t test and Pearson correlation analysis. Results:At 1, 2, 3 and 4 weeks after the establishment of PD model, the rotation speed of PD model to the healthy side was (4.55±1.37), (8.64±1.64), (9.96±1.83) and (11.67±2.77) r/min, respectively, while there was no rotation behavior in the control group. Meanwhile, the ratios of 11C-CFT uptake and the number of TH positive neurons in the PD model group were 0.658±0.038, 0.580±0.094, 0.513±0.042, 0.394±0.065 and 0.698±0.066, 0.604±0.062, 0.546±0.064, 0.315±0.082, respectively, which were significantly lower than those in the control group (0.997±0.048 and 0.996±0.054; F values: 167.50, 169.20, both P<0.05). Correlation analysis showed that 11C-CFT uptake ratio was correlated with rotation behavior (rotation speed) and TH positive neuron ratio ( r values: -0.877, 0.897, both P<0.001). Conclusion:In the PD animal model, the ratios of 11C-CFT uptake has a good correlation with the degree of damage to dopamine neurons in the substantia nigra of the midbrain (TH positive neuron ratio) and the severity of PD.

Objective To assess the association of synovial cyclic citrullinated peptide(CCP)expression with T helper 17(Th17) cells/Regulatory T cells (Treg) imbalance,the histological and clinical features of synovitis in rheumatoid arthritis (RA).Methods CCP expression in synovial specimens from 39 patients with RA and 35 controls was detected by immunohistochemistry assay(IH) using 6×His tagged anti-CCP single chain fragment V (ScFv) antibodies,which were generated by pHEN2 phagemid recombinant antibodies display system.The frequencies of Th17/Treg cells in the peripheral blood mononuclear cells (PBMCs) were determined by flow cytometry (FCM).Th17/Treg cells associated cytokines were analyzed by enzyme-linked immunosorbent assay (ELISA).The histological scores and clinical features of synovitis were included in the study.Chi-square test and ANOVA were used for statistical analysis.Results ① The prevalences of synovial C CP expression were significantly different between RA group and the control(76.9％ and 11.4％ respectively,X2=31.9,P＜0.01).② The frequencies of Th17 cells,Th17/Treg ratio,Th17 cells associated cytokines as IL-6,IL-17a,IL-23,TNF-α,and the Treg cells associated cytokines TGF-31,the serum and synovial fluid anti-CCP antibodies in the RA patients with synovial CCP positive expression were significantly higher in RA patients with CCP positive than those with CCP negative.Disease activity score DAS28 index and histological features quantified variations of the synovial biopsy specimens (synoviocyte hyperplasia,focal aggregates of lymphocytes,and diffuse infiltrat(e)s of lymphocytes) in RA were higher in synovial CCP positive expression patients than in the negative.Conclusion Synovial CCP expression is strongly associated with the Th17/Treg imbalance and synovitis,which may play a crucial role in the pathogenesis of RA.

Objective To investigate the biological role of LINC01614 in non-small cell lung cancer A549 cells and its drug resistance-related mechanism. Methods The CRISPR/Cas9 technology was used to construct the A549 cell model with knockdown of LINC01614. Transcriptome sequencing was performed on A549 cells knocked down with LINC01614. We validated the transcriptomic differential genes MCAM and ABCC3 at the gene level and MCAM at the protein level, detected the IC₅₀ changes of A549 cells after knockdown of LINC01614 under the effect of different concentrations of cisplatin, and detected the effect of knockdown of LINC01614 on the migration ability of A549 cells. Results Of the 2 713 DEGs after knockdown of LINC01614, a total of 1 626 genes were up-regulated and 1, 087 genes were down-regulated. GO analysis showed that DEGs were associated with intracellular signaling, cell adhesion, and so on. Meanwhile, the KEGG analysis showed that DEGs were associated with the Wnt signaling pathway, TGF-β signaling pathway, and Rap1 signaling pathway. Selection of drug resistance-associated gene ABCC3 from DEGs for validation with MCAM: qRT-PCR results showed that knockdown of LINC01614 significantly down-regulated the expression of MCAM (P<0.05) and upregulated the expression of ABCC3 on A549 cells (P<0.05). After knockdown of LINC01614, the protein expression of MCAM, was significantly decreased in A549 cells (P<0.05); the IC₅₀ of A549 cells to cisplatin was significantly increased (P<0.05); and the scratch healing rate of A549 cells was also significantly decreased (P<0.05). Conclusion LINC01614 may be associated with the proliferation, invasion, and apoptotic pathways of A549 cells. In addition, LINC01614 may exert its migration ability through MCAM and chemoresistance to cisplatin through ABCC3.