Study on prevalence of physical activity in rural residents in four counties (districts) of Shanxi and Chongqing / 中华流行病学杂志

Objective To investigate the prevalence of physical activity and its influencing factors in rural residents in Shanxi and Chongqing.Methods In four counties (districts) of Shanxi and Chongqing,local residents aged ≥ 18 who lived there for more than one year and had no plan to migrate to other areas in 2 years were surveyed through face to face questionnaire interviews to collect the information about their daily physical activity time,sedentary time,related knowledge and attitude,and others.Results The physical inactivity rate of the residents was 14.9％,and 88.7％ of residents never took daily physical activity.The average sedentary time was (3.91 ± 2.06) hours.The results of multivariate analysis showed that education level,per capita monthly income and activity degree were the factors influencing physical inactivity.Conclusion The proportion of people who never took daily physical activity in the survey area was higher than the average level in rural areas in China,so measures should be taken to improve the overall rate of physical activity.For people who have exercise willingness,but have no practice,and those who have already increased their physical activities,targeted guidance is needed on the basis of strengthened health education.

Study on prevalence of physical activity in rural residents in four counties (districts) of Shanxi and Chongqing / 中华流行病学杂志

Objective To investigate the prevalence of physical activity and its influencing factors in rural residents in Shanxi and Chongqing.Methods In four counties (districts) of Shanxi and Chongqing,local residents aged ≥ 18 who lived there for more than one year and had no plan to migrate to other areas in 2 years were surveyed through face to face questionnaire interviews to collect the information about their daily physical activity time,sedentary time,related knowledge and attitude,and others.Results The physical inactivity rate of the residents was 14.9％,and 88.7％ of residents never took daily physical activity.The average sedentary time was (3.91 ± 2.06) hours.The results of multivariate analysis showed that education level,per capita monthly income and activity degree were the factors influencing physical inactivity.Conclusion The proportion of people who never took daily physical activity in the survey area was higher than the average level in rural areas in China,so measures should be taken to improve the overall rate of physical activity.For people who have exercise willingness,but have no practice,and those who have already increased their physical activities,targeted guidance is needed on the basis of strengthened health education.

Inhibitory activities of 3-trifluoromethyl benzamide derivatives against the entry of H5N1 influenza viruses / 南方医科大学学报

<p><b>OBJECTIVE</b>To study the inhibitory activities of 3-trifluoromethyl benzamide derivatives against the entry of H5N1 influenza viruses.</p><p><b>METHODS</b>The lead compound was structurally modified to obtain 3 compounds with inhibitory activities against H5N1 influenza viruses. Specs compound librany was screened and 4 compounds were identified to have such inhibitory activities. The inhibitory activities of these compounds were tested at a celluar level against H5N1 influenza viruses.</p><p><b>RESULTS AND CONCLUSION</b>The compounds 1a, 1b, 1e and 1f showed signifcant inhibitory activities against the entry of A/AnHui/1/2005 pseudovirus into the target cells with an IC50 value of 4.7 ± 0.3 µmol/L.</p>

Difference in upper airway between OSAS patients and normal population with dynamic radiography / 实用放射学杂志

Objective To analyze the difference in changes of upper airway between obstructive sleep apnea syndrome (OSAS) patients and normal population using dynamic radiography under sleeping and awake conditions.Methods 20 normal subjects and 20 OSAS patients underwent the dynamic digital radiography of the upper airway under sleeping and awake conditions.And the dynamic diameter changes of the upper airway at velopharyngeal,oropharynx and hypopharynx levels were measured and recorded.Results The velo-pharyngeal upper airway collapse in normal subjects under sleeping condition was significantly larger than that under awake condition (P <0.014).However no significant differences in the collapse of upper airway at oropharynx and hypopharynx level were observed between sleeping and awake conditions.For the OSAS patients,the upper airway collapses at velopharyngeal,oropharynx and hypopharynx levels under sleeping condition were significantly larger than those under awake condition respectively (P <0.000,P =0.001,P <0.013). During awake state,there were no significant differences in upper airway collapse at velopharyngeal,oropharynx and hypopharynx levels between normal subjects and OSAS patients under awake condition.During sleeping state,the upper airway collapses of OSAS patients were significantly larger than that of normal subjects at velopharyngeal and oropharyngeal levels (P =0.000,P =0.003). However,no significant difference was observed at hypopharynx level.Conclusion The normal upper airway represents obvious col-lapse at velopharyngeal level under sleeping condition.However,the upper airway in OSAS patients at velopharyngeal,oropharynx and hypopharynx level showed significant collapse under sleeping condition compared with that under awake condition.The upper airway of the OSAS patients represents obvious collapse at velopharyngeal and oropharyngeal level under sleeping condition,however no abnormal changes can be observed under awake condition.

The anti-HIV-1 entrance activity and mechanism of action of myriceric acid B from Rhoiptelea chiliantha Diels et Hand-Mazz / 中国药理学通报

Aim To investigate the HIV-1 entry inhibitory activities of myriceric acid B and C isolated from Rhoiptelea chiliantha Diels et Hand-Mazz and their mechanism of action.Method The plasmids encoding envelope proteins of HIV-1 (pHXB2) and VSV (pVSV-G) were cotransfected 293T cells with pNL4-3.Luc.R-E- to produce HIV-1 Env pseudovirus and VSV-G pseudovirus,respectively,which were used for testing the antiviral activities of these compounds.ELISA and molecular docking were used to study the mechanism of action of the active compounds.Results Myriceric acid B could significantly inhibit the infection of HIV-1 Env pseudovirus with an IC_(50) of(8.3±0.2)mg·L~(-1).The carbonoxyl group at C-28 position and the hydroxyl group at the C-3 position of myriceric acid B are important for its anti-HIV-1 activity.Like other HIV-1 entry inhibitors targeting gp41 (eg,ADS-J1 and NB-64), myriceric acid B could also block the gp41 six-helix bundle formation.Molecular docking analysis suggests that myriceric acid B may bind to the hydrophobic cavity of the gp41 N-trimeric coiled coil.Conclusion Myriceric acid B is a potent HIV-1 entry inhibitor targeting gp41 and can serve as a lead compound for developing novel anti-HIV-1 drug.

Roles of the hemagglutinin of influenza A virus in viral entry and development of antiviral therapeutics and vaccines

Seasonal influenza epidemics and influenza pandemics caused by influenza A virus (IAV) has resulted in millions of deaths in the world. The development of anti-IAV vaccines and therapeutics is urgently needed for prevention and treatment of IAV infection and for controlling future influenza pandemics. Hemagglutinin (HA) of IAV plays a critical role in viral binding, fusion and entry, and contains the major neutralizing epitopes. Therefore, HA is an attractive target for developing anti-IAV drugs and vaccines. Here we have reviewed the recent progress in study of conformational changes of HA during viral fusion process and development of HA-based antiviral therapeutics and vaccines.

Bronchioloalveolar Carcinoma:Imaging Classification and Dynamic Changing / 实用放射学杂志

Objective To research the imaging classification and dynamic changing of bronchioloalveolar carcinoma (BAC). Methods The imaging types of BAC proved by operation and pathology in 32 cases were divided into single nodules, single segment or lobe consolidation, multiple segments or lobar consolidation and multiple diffuse nodules according to the features of plain chest films and CT at first examination. The spreading lesions in lung were recorded.The developing course and changes in size of lesions on the followed-up plain films and CT were observed, then the developing rules of different types of BAC were analyzed. Results The single noduli were enlarged and became poor defined opague shadows gradually. The single segment or lobar consolidation enlarged until the whole lobe. All single lesions progressed and coexisted with diffused nodular or opaque pulmonary involvement eventually. Multiple segments or lobar consolidation developed from peripheral to center of the segment or lobar, diffused pneumonia-like shadows appeared simultaneous. Multiple extensive nodules showed a trend of getting larger and then fused.Conclusion Different types of BAC have theirown developing rule,but they finally form a consequence that the primary lesion coexisted with the spread ones from different way.

Comparative Study on Imaging of Pulmonary Artery Branches in Different Phase of Cardiac Cycle in Healthy Adult / 实用放射学杂志

Objective To establish the database of diameter and length of the pulmonary artery branches in different phase of cardiac cycle in healthy adult chest MDCT.Methods Normal enhanced chest MDCT with ECG-gating was selected and slab thin slice maximaun intensity projection(STS MIP) reconstruction were performed in different periods on ECG represent systole and diastole respectively.The diameter and length of pulmonary artery on the plane which showed the whole length of the aim artery were measured.Doppler UCG with ECG-gating was performed in healthy adults to measure the inner diameter of pulmonary trunk and right and left pulmonary artery in different phases of the cardiac cycle as contrast method.Results Normal enhanced chest MDCT with ECG-gating showed the diameter in systole period of the main pulmonary artery was larger than that in diastole period,while it went conversely to that of the proximal part of two pulmonary arteries,distal part of the right pulmonary artery,right media-lobe artery,both S10 segmental arteries and the difference were statistic significantly,only the length in diastole period of the right upper lobe artery was larger than that in systole period.The distance between the measured point of the main artery and the right one showed larger in diastole than systole period.On ECG-gating UCG,in addition to that the diameter change of the main pulmonary artery during the two periods were coincident with MDCT,the two pulmonary artery had no significant difference during the two periods.Conclusion It is necessary using branching geometry data of the main artery to segmental arteries in different period of the cardiac cycle with normal enhanced chest MDCT for flowing model building of pulmonary artery.