The launch of Expedition 1 to the International Space Station (ISS) opened a new era in the history of human space flight, so far fourteen Expeditions had been achieved. But the astronauts were exposed to abnormal environment such as microgravity, radiation, isolation, confinement, and misalignment of circadian rhythm during space flight. In order to reduce health risks incurred by living in space, the 59 projects have been or will be studied aboard ISS. Those researches has elucidated the rate of subregional bone loss and its recovery, characteristics of atrophy and reduced contraction function in antigravity skeletal muscle, decrease in spinal cord excitability, and relationship between reduced immune function and reactivation of some viruses. The psychological and behavior changes in a prolonged isolation and confinement condition, as well as the fast circadian rhythm inducing sleep disruption has been observed. It has been found exposure to radiation not only causing cataracts and cancers, but also damaging the reproductive organs and nervous system, and inducing genetic damage. The efficacy of countermeasures of medicine, nutrition and vibration have been validated aboard the ISS. The effective countermeasures on different systems were checked further. All of those studies and observations have made a solid foundation for developing novel countermeasures which will be more effective.

At present, immune checkpoint inhibitors (ICIs) are widely used in clinical, and the common adverse reactions include adverse reactions of skin, gastrointestinal tract, endocrine and liver. Adverse reactions to the lungs and heart are relatively rare, but can be fatal. Systemic steroid therapy is the main treatment for immune related adverse events (irAEs). If there is no response to steroid therapy, an immunomodulator may be considered. Understanding the incidence, pathogenesis, common types and treatment strategies of irAEs can provide theoretical basis for the safe application of ICIs in clinical practice.

Endothelial Cells ; metabolism ; pathology ; Humans ; Sepsis ; metabolism ; physiopathology

Background The pathogenesis of myopia is currently unclear. Studies showed that retinoic acid regulates the development of myopia. Whether IRBP, a retinoid transport proteins, participates in the development of myopia or not is unknown. Objective The aim of this study was to investigate the expression of interphotoreceptor retinoid-binding protein (IRBP) in the retina of guinea pig with lens-induced myopia and study the relationship between IRBP expression and experimental myopia. Methods Fifty guinea pigs were randomized into the normal controls(n=10) ,defocus Ⅰ group (n=20) and defocus Ⅱ group (n=20). Guinea pigs in the defocus Ⅰ groups wore -10. 00 D lenses on the right eyes for 14 days and the defocus Ⅱ group for 28 days. The left eyes of both defocus groups did not wear any lens served as self-control. The refraction diopter and axial length were measured before and after wearing lenses. The protein expression of IRBP in the retina was detected by immunohistochemisty and Western blot. RT-PCR was used to observe the level of IRBP mRNA in the retina. Result Compared with the control eyes,the right eyes in the defocus Ⅰ and Ⅱ groups developed to ( -5. 53±1.93) D and (-8.69±2.46) D, and the ocular axial length elongated to (0. 31±0. 15 ) mm and (0.41 ±0. 13 ) mm, showing statistically significant differences between them ( group Ⅰ: t= 12. 57,29.63 ,P＜0.05 ;group Ⅱ :t= 15.82,44.35 ,P＜0.05 ) ,and the degree of myopia was lower and axial length was shorter in group Ⅰ than the eyes of group Ⅱ ( P＜0.05 ). There was no statistically significant differences found between the left eyes of defocus group Ⅰ and defocus group Ⅱ or eyes of the control group in diopter and axial length (P＞0.05). Immunochemistry revealed that the mean gray value of IRBP protein expression was 165.62t4. 93 and 171.00±4. 25 in defocus Ⅰ group and defocus Ⅱ group and was significantly higher than that of the self-control eyes and the normal control group ( 156. 31±4.00,155.26 ±3.49 and 158.61 ±4. 58 ) ( P＜0.05 ). Western blot demonstrated that the expressios of IRBP protein were down-regulated and RT-PCR showed the IRBP mRNA level of IRBP was significantly lower in defocusIgroup and defocusⅡgroup,compared with the self-control eyes and the normal control group (P＜0. 05). Conclusion Expression of IRBP in guinea pig may play a role in lens-induced myopia.

AlM: To evaluate the effectiveness of Spot Vision Screener on vision screening of children without cycloplegia.METHODS:A total of 87 children (174 eyes) aged from 2~9 years old were examined with Spot Vision Screener and optometrist before cycloplegia.RESULTS: Statistical analysis demonstrated that the cylinder diopter and axis, the equivalent spherical diopter in both eyes, and the spherical diaopter in left eye had no significant change ( P>0. 05 ). However, the spherical diaopter in right eye had statistical significance. CONCLUSlON: Spot Vision Screener is a suitable instrument in vision screening of children without cycloplegia.

Acquired Immunodeficiency Syndrome ; prevention & control ; Adult ; Burnout, Professional ; Chi-Square Distribution ; Female ; Humans ; Male ; Medical Staff ; Middle Aged ; Rural Population ; Surveys and Questionnaires ; Young Adult

ObjectiveTo investigate the influence of nateglinide treatment of newly diagnosed patients with type 2 diabetes on the state of inflammatory response. MethodsThe clinical data of 74 newly diagnosed patients with type 2 diabetes were retrospectively reviewed,and treated with nateglinide,before and after treatment,the fasting blood glucose (FBG), postprandial blood glucose 0.5h ( 0.5 hPG), 1 h postprandial blood glucose ( 1 hPG) ,2h postprandial blood glucose(2hPG) ,fasting insulin(FINS) ,0.5h postprandial insulin(0. 5hINS) ,postprandial 1h insulin( 1 bINS),2h postprandial insulin(2hINS),interleulin-2(IL-2) and C-reactive protein(CRP) levels were observed. ResultsAfter treatment,the FBG,0. 5hPG, 1hPG,2hPG, FINS,0. 5hINS, 1hINS,2hINS, IL-2 and CRP of patients were ( 8.0 ± 1.5) mmol/L,(12.0±1.8)mmol/L,(10.2 ± 1.3) mmol/L,(10.5 ±1.2) mmol/L,(168.2 ±11.5) pmol/L,(213.5±23.5) pmol/L,(197.0 ±21.5) pmol/L,(189.5 ±12.0) pmol/L,(14.0 ±1.5) μg/L, (13.5 ±1.5) mg/L,compared with( 10. 5 ± 1.0) mmol/L, ( 14. 5 ± 1.5) mmol/L, ( 12. 5 ± 1.4) mmol/L, ( 11.6 ±2.0) mmol/L,(180.7 ±12.0) pmol/L,(229.8 ±26.0) pmol/L,(218.5 ±23.0) pmol/L, (197.0± 14.5) pmol/L,(12.5 ±2.0) μg/L, (22.8 ±2.0) mg/L before treatment decreased significantly(t =11. 9293,9. 1785,10. 3561,4. 1115,6. 4696,4.0009,5. 8744,3. 4279,5. 2307,32.0006, all P ＜0. 05). There was no serious adverse events in treatment process. ConclusionNateglinide treatment of newly diagnosed patients with type 2 diabetes could significantly improve the patient's inflammatory response state,and there was no serious adverse events in treatment process.

Objective To express and purify the killer immunoglobulin-like receptor KIR3DL1 extracelluar domain.Methods pUC57-KIR3DL1 was used as template,KIR3DL1 extracelluar domain was amplified by polymerase chain reaction(PCR)and cloned into pGEM-T vector with A-T cloning technique.After DNA sequence analysis,the target fragment was inserted into the prokaryotic expression vector pET28a-DsbA to construct the recombinant vector pET28a-DsbA /KIR3DL1.The recombinant plasmid was transformed into E.coli BL21(DE3),and induced with IPTG.Bacterial pellets were resuspended in 8M urea and centrifuged to remove the insoluble material.The crude extract was purified by passing over a Ni-NTA-agarose column.After the inclusion body flowing through the Ni-NTA-agarose affinity chromatography was refolded successfully,it was purified by Superdex75 gel filtration and the purification effects of the fusion protein were identified by SDS-PAGE and western blot.Result Some fusion proteins were expressed in the supernatant,and the others were expressed in the form of inclusion bodies.The purity of fusion protein was over 95% after purification under denaturing condition.Conclusion The highly efficient expression of KIR3DL1 extracelluar domain laid the foundation for the further studies on exploration of the mechanism of immunization recognition between KIR3DL1 and its ligand.

AIM:The aim of this study was to observe and compare the therapy effect of different kinds of embryonic stem cells(ESCs) on pulmonary injury of mice exposed to bleomycin.These embryonic stem cells were C57BL/6J-ESC,S8-ESC and human-ESC.METHODS:(1) Fifty C57BL/6J female mice were divided randomly into five groups,which were blank control group,bleomycin model group,bleomycin model injected with C57BL/6J-ESC group,bleomycin model with S8-ESC group and bleomycin model with human ESC group.Every group has ten mice.(2) The mice of control group were administrated 0.9% sodium chloride solution and the mice in other four groups were administrated bleomycin intratracheally.Three different kinds of ESCs were administrated to the mice in three different ESCs-treated groups respectively one hour after bleomycin exposure.The life-span and hydrocyproline concentration were examined.The pathologic changes of the lung and the engraftment of the ESCs in the injured lung were observed.RESULTS:(1) The death rate in three different ESCs-treated groups declined much more obviously than that in the control group on 8 days after bleomycin exposure(bleomycin model group 50%,C57BL/6J-ESC group 37.5%,S8-ESC group 20%,human-ESC group 20%).(2) The extent of pathologic changes of the lung in S8-ESC group was lighter significantly than that in the bleomycin model group,but in C57BL/6J-ESC group and human-ESC group,their pathologic changes were similar to that in bleomycin model group.(3) The hydrocyproline concentration in S8-ESC group was lower distinctly than that in bleomycin model group(P0.05).(4) The positive signals of three kinds of ESCs could be found in the lung at 1,3,12 and 24 hours after the stem cells were administrated,but signals were the strongest 3 hours after stem cells were given.All of the signals disappeared three days later.CONCLUSION:S8-ESCs transplantation can improve the tolerence of mice to bleomycin and ameliorate acute lung injury.

Objective To evaluate the mortality and survival time of war injuries, followed by seawater immersion. Methods Animal models of injuries including open chest injury, open abdominal injury, burn, hemorrhagic shock, were reproduced. The animals were divided into two groups: control group consisting simple injury without seawater immersion, and seawater immersion group consisting similar injuries followed by seawater immersion. The survival time of animals of the two groups were recorded. Results The mean survival time of the animals with open chest injury and open abdominal injury followed by seawater immersion was 45 minutes and 162 minutes, respectively. The mortality of 30% Ⅱ degree burn was 50% after seawater immersion for 4 hours, while it was 6% without seawater immersion. The mortality of moderate hemorrhagic shock with four-hour with seawater immersion was 90%, while all the animals survived without seawater immersion. Conclusions The experimental study showed that the mortality rate was significantly raised and the survival time significantly shortened when open wounds were exposed to seawater for a certain period of time. Hypertonicity of the seawater with high sodium content, and low temperature of seawater might play important roles in producing various pathophysiological changes which contributed to early death of the animals.