The current prevalence of myopia has been as high as 27.65%～53.80%among adolescents in Chinese schools.The major reasons are too much near-work activity and lack of outdoor activity for a long time.In order to reduce the prevalence of myopia in Chinese adolescents,we suggest that Chinese students should have 3.5 hours outdoor activity everyday,including 30 minutes travel between home and school,1 hour outdoor activity between classes,1 hour outdoor sport class at school,and 1 hour outdoor activity after school.

Background The orbital fibroblasts (OFs) in thyroid associated ophthalmopathy (TAO) play important roles in the proliferative and inflammatory response.Seeking the drug which inhibit OFs growth is of a vital significance for the prevention and treatment of TAO.Research documented that colchicine has an anti-fibrosis effect.But its influence on OFs of TAO patient is few known.Objective This study was to investigate the effect of colchicine on growth and apoptosis of OFs in vitro.Methods The retroobital connective tissue was obtained form 3 TAO patients and cultured using explant method.OFs were passaged and identified by immunochemistry,and 3-8 genetaions of cells were used in the study.Colchicine at the concentrations of 1 × 10-8,1 × 10-7,1 × 10-6,1 × 10-5,1 ×10-4 mol/L was added into the RPMI 1640 with 10％ fetal bovine serum(FBS) to incubated the cells for 24,48 and 72 hours respectively,and only RPMI 1640 was used to culture the cells as the control group.Cell counting kit-8 (CCK-8)was used to detect the absorbance value (A450) of OFs for the evaluatuion of OFs and the inhibitory rate of colchicine to OFs.The colchicine of 1 ×10-6,1 ×10-5,1 × 10-4 mol/L was added into the culture medium for 48 hours,and then the apoptotic rate of the cells and the cell percentage in various cellular cycle was assayed by flow cytometry(FCM).The expression of transforming growth factor-β (TGF-β)in the cells was detected by immunochemistry to assess the influence of colchicine on the serection of the cells.Results Cultured cells showed the spindle-like in shape and the cell number was significantly increased with the incubation time.After incubated with 1 × 10-4,1 × 10 5,1 × 10-6,1 ×10-7,1 × 10-8 mol/L colchicines,the A450 values were gradually reduced with the increase of the concentrations of colchicine(F ion =62.004,P＜0.05),and significant differences were found between different contrations of colchicine groups(all P＜0.05).Aslo,gradually declined A450 values of the cells were seen with the lapse of culture time among the groups(Ftime =459.582,P＜0.05).The inbitory rate of colchicine to the cells was elevated with the increase of concentrations.The apoptotic rates of the cells were (1.73 ± 0.15) ％,(21.04 ± 4.56) ％,(31.84 ±6.21)％and(35.32±5.56)％ in the control group and 1 × 10-6,1 × 10-5,1 × 10 4 mol/L colchicine groups respectively,with statistically significant difference among the 4 groups (F =83.905,P＜0.05).With the increase of concentrations of colchicines,the cell percentage in G2 +M phase lessened gradually,showing significant difference among the control group and the 1 × 10-6,1 × 10-5,1 × 10-4 mol/L colchicine groups (F =20.443,P＜0.05).The expression of the TGF-β in the cells was (97.60± 2.09) ％ in the control group,and that in the 1 × 10-4 mol/L colchicine group was (44.43 ± 3.96) ％,presenting a significant difference between them (t =65.330,P ＜ 0.05).Conclusions Colchicine can induce apoptosis of OFs and inhibit the prolilferation of OFs in a time-and dose-dependent manner probably by decreasing the TGF-β secretion

Objective To investigate the morphological characteristics of vertebral-basilar artery in patients with posterior circulation ischemia vertigo. Methods The data of cerebrovascular disease related risk factors,neck CT angiography,and head MR angiography of 122 patients with posterior circulation ischemia vertigo and 60 non-vertigo volunteers with cerebrovascular disease related risk factors over the same period were analyzed retrospectively. The positive index of single factor comparison was analyzed by using multivariate logistic regression analysis. The risk factors for posterior circulation ischemia vertigo were screened,and the degree of vertebral artery stenosis and the degree of basilar artery tortuosity of the posterior circulation ischemia group were compared with those of the control group. Results (1 )The incidences of hypertension,hyperlipidemia,previous history of stroke or transient ischemic attack,vertebral artery atherosclemtic stenosis,vertebral artery variation,and basilar artery tortuosity of the posterior circulation ischemia group were 59%(n=72),55. 7%(n=68),64. 8%(n=79),41. 0%(n=50),28. 7%(n=35),and 30. 3%(n=37),respectively,and they were all significant higher than 33. 3%(n=20),31. 7%(n=19),35. 0%(n=21),15. 0%(n=9),10. 0%(n=6),and 15. 0%(n=9)of the control group. There were significant differences (all P<0. 05). (2)Vertebral artery atherosclerotic stenosis (OR,3. 891, 95%CI 1. 721-8. 800,P <0. 01),vertebral artery variation (OR,3. 231,95%CI 1. 238-8. 432,P =0.017),and basilar artery tortuosity (OR,2. 664,95%CI 1. 189-5. 972,P=0. 017)were the independent risk factors for posterior circulation ischemic vertigo. The degrees of vertebral artery stenosis and basilar artery tortuosity of the posterior circulation ischemic group were higher than those of the control group. There were significant differences (all P<0. 05). There was significant difference in the vertebral artery dominance between the degree of basilar artery tortuosity ≥grade 2 and

In artificial immune optimization algorithm, the mutation of immune cells has been considered as the key operator that determines the algorithm performance. Traditional immune optimization algorithms have used a single mutation operator, typically a Gaussian. Using a variety of mutation operators that can be combined during evolution to generate different probability density function could hold the potential for producing better solutions with less computational effort. In view of this, a linear combination mutation operator of Gaussian and Cauchy mutation is presented in this paper, and a novel clonal selection optimization method based on clonal selection principle is proposed also. The simulation results show the combining mutation strategy can obtain the same performance as the best of pure strategies or even better in some cases.

The methods of diagnostic imaging for pulmonary embolism is diversified. However, the different characteristic features of diagnostic imaging and diagnostic accuracy impressive influenced the choice of selection by clinicians. Furthermore, the principle and indication of interventional therapy would have great impending force on the outcomings. This article presents a comprehension of diagnostic imagings and interventional therapy for pulmonary embolization.

Objective To study the part of Anti-thrombus and its property from Ground Beetle. Methods To dispart the Ground beetle into four segments which were shell, head, chest and abdomen, and adopt the method of frozen and melt to do the further test. Result Extracts of shell and chest were not active, extracts of head and abdomen were active. The activity of abdomen extracts was much better than that of the insect extracts. Its active component was glycoproteins. Conclusion The activity of abdomen extracts (Tf) is relatively high, and demonstrates wider value.

Objective: To investigate the loneliless situation of the elderly, and explore the relationship between loneliness,filial expectations and intergenerational social support among the elderly. Methods: Using UCLA Loneliness Scale, Intergenerational Social Support and Fealty Expectation Questionnaire, we investigated 423 samples of old people aged 60 ～94 of Changsha City. Results: The mean score of loneliness was 39.8 (s =7.3). Ordinal regression analysis indicated that the loneliness of the elderly was significantly related to received adult children social support (OR=2.208, P=0.006),afforded adult children social support(OR=2.056,P=0.01) and filial expectation(OR=1.872,P=0.027),controlled by age, sex, level of education, marriage, level of family income, and residence status. Filial expectation directly affected loneliness and indirectly affected loneliness through received adult children social support and afforded adult children social support. Conclusion: The loneliness of the elderly are significantly related to filial expectation and intergenerational support.

It is the most important mission that preserving and developing advancement of TCM theory and practice.We need defi nitive medical standard to standardize the development.Whether there was any standards in the history of traditional Chinese medicine is a hot question.Though the history research,we found that TCM classic literature was the medical standard in ancient China,which was confirmed by Tang-song government though official action.The standard teaching materials promoted the communication and development of TCM.After Song dynastythe standard position and function was strengthened continuouslywhich had a profound effect.

Objective To investigate the function of donor-derived dendritic cells (DCs) treated with NF-?B decoy in prolonging murine cardiac allograft survival time.Methods Donor bone marrow- derived DCs were treated with NF-?B decoy in vitro.Heterotopic abdominal heart transplantation was performed from BALB/c to C57BL/6 mice.Recipients were grouped according to different pretreat ments as follows:(1) Control group,infusion of PBS (0.2 ml) alone intravenously via the portal vein 7 days before heart transplantation;(2) CsA group,treated with sub-therapeutic CsA only for 7 days (10 mg?kg~(-1)?day~(-1)) through intraperitoneal injection after transplantation,and the same as control group before transplantation;(3) Control DCs group,infusion of only cultured 5th-day recipient DCs untreated with NF-?B ODN decoy;(4) Treated DCs group,infusion of recipient DCs pretreated with NF-~cB ODN decoy;(5) Combined treatment group,infusion of recipient DCs treated with NF-~cB ODN decoy before transplantation and intraperitoneal injection of sub-therapeutic CsA for 7 days (10 mg?kg~(-1)?day~(-1)) after transplantation;(6) Third party donor group,C3H/HeJ mice used as donor, and recipient (C57BL/6) was treated the same as combined treatment group.Every group had 8 mice and graft survival time was observed.Cytokines (IL-2,INF-?,IL-4 and IL-10) in recipient serums were analyzed by ELISA at 7th day after transplantation.Results The graft mean survival time (MST) in control group,CsA group,Control DCs group,treated DCs group,combined treatment group and third party donor group was 7 days,10.3 days,7.6 days,21.4 days,53.6 days and 9 days,respectively.There was significant difference in MST between treated DCs group and control group or control DCs group (P

Objective To investigate the association between brain structure abnormalities and neuropsychology impairment in CAD patients.Methods Nineteen patients with CAD and 1 7 healthy adults were examed with MRI,and T1 WI,T2 WI,FLAIR,DWI and DKI image were performed,and then comparing the acquired MRI findings between two groups.Results Significant differences were observed for MK values in splenium and body of the corpus callosum,left cerebellar hemisphere and amygdala cerebelli.MK values of CAD group were lower than those of healthy group in these regions,and differences were statistically significant(P <0.05). There were significant correlation between MK values of the left amygdala cerebelli and MoCA scores in CAD group.Conclusion DKI could detect the changes of brain tissue microstructure in CAD patients early.The correlation between MK and neuropsychologi-cal function provides an important basis for early diagnosis and treatment.