Objective To explore the clinical characteristic,level of plasma renin angiotensin (PRA),plas-ma angiotensin Ⅱ(Ang Ⅱ)and plasma aldosterone(Aldo)in the sleep apnea hypopnea syndrome (SAHS)patients, and to investigate the association between SAHS and hypertension.Methods The patients were selected for the study who were monitored with polysomnography.They were divided into SAHS group and non-SAHS group according to apea-hypopnea index(AHI),and there were 180 patients in the SAHS group,175 patients in the non-SAHS group. The systolic blood pressure(SBP),diastolic blood pressure(DBP)and the level of PRA,plasma Ang II and plasma Aldo were compared by variance analysis.Results The gender composition was different between the two groups,and had statistically significant difference(χ2 =16.30,P <0.01).The data of age,body mass index,neck circumference, waistline,DBP,SBP in SAHS group were significantly higher than those in non-SAHS group,and the differences were statistically significant(t =6.84,8.19,9.84,6.63,7.08,5.45,all P <0.01 ).The prevalence of hypertension in SAHS group was 46.58%,which was higher than 18.20% in non-SAHS group,and the difference had statistically significant(χ2 =46.71,P <0.01).The AHI had positive correlation with SBP,DBP,and they had statistically signifi-cant differences (rs =0.162,0.228,all P <0.01).The levels of PRA and plasma Ang Ⅱ were lower in SAHS group than those in non-SAHS group,while the level of plasma Aldo was higher in SAHS group than that in non-SAHS group,and had statistically significant differences(F =15.41,14.21,17.67,all P <0.01).In the SAHS group,the levels of PRA and plasma Ang Ⅱ were lower in hypertension group than those in non-hypertension group,while the level of plasma Aldo was higher in hypertension group than that in non-hypertension group,and had statistically signif-icant differences (F =15.41,14.21,17.67,all P <0.01).Also,the levels of PRA and plasma Ang Ⅱ were lower in SAHS group with hypertension than those in non-SAHS group with hypertension,while the level of plasma Aldo was higher in SAHS group with hypertension than that in non-SAHS group with hypertension,and the differences were sta-tistically significant(F =15.41,14.21,17.67,all P <0.01).Conclusion The occurrence of SAHS is correlated with the gender composition,age,body mass index,neck circumference,waistline,DBP and SBP.In SAHS complica-tions in each system,the highest incidence is hypertension.And the AHI has positive correlation with SBP,DBP,and the difference is significant.In the SAHS group,if the AHI is higher,the risk of hypertension is greater.In the SAHS patients with hypertension,the level of plasma Aldo is significantly elevated,while the levels of PRA and plasma AngⅡ are decreased significantly.

Objective To investigate the number and activation status of circulating mucosal associated invariant T (MAIT) cells in patients with sepsis.Methods Flow cytometric method was used to determine the number and percentage of MAIT cells and their expression of activation molecule CD69.Results The circulating MAIT cells dropped significantly at early stage of sepsis in septic patients.The MAIT cells in the sepsis group continued to express high levels of CD69 on day 1 and day 3 after admission to ICU.Conclusions Remarkable decrease of circulating MAIT cells may portend the possibility of sepsis in patients with severe infection.

Objective To examine the correlation between end-tidal carbon dioxide (PetCO2) and arterial CO2 (PaCO2) among patients admitted in neurosurgical intensive care unit (NICU) and the factors affecting the PaCO2-PetCO2 [P (a-et) CO2].Methods Thirty-two intubated or cut-trachea patients who presented in the NICU were enrolled.Arterial blood gas test was done at seven every morning,and values of PetCO2 were compared with simultaneously recorded PaCO2.The normal gap of P (a-et) CO2 was defined as-5 mmHg to 5 mmHg.Concordance between PaCO2 and PetCO2 was analyzed using the Bland-Altman plot.Parameters between the normal and high P(a-et) CO2 groups were compared to identify the factors affecting the P(a-et) CO2,including Glasgow Coma Scale(GCS),blood pressure (BP),heart rate (HR),respiration rate (RR),body temperature (BT),and pulse oxygen saturation (SpO2).Results Allvalues of PaCO2 and PetCO2 were in accordance with normal distribution (r =0.668,P ＜ 0.01) and concordance between PaCO2 and PetCO2 was 69.8％.Patients who had high P(aet) CO2 showed lower initial GCS,lower instant GCS,BT,as well as pH and higher actual bicarbonate (AB) and PetCO2 than the patients with normal P (a-et) CO2.Correlation between PaCO2 and PetCO2 rapidly declined when positive end expiratory pressure(PEEP) was greater than 5 mmH2O(r =0.229,P ＜ 0.01).Conclusions PetCO2 correlates well with PaCO2 and appears to be a useful monitor of respiratory function of the patients consecutively.Initial GCS,BT,AB and PEEP have an impact on P(a-et) CO2,so those factors should be considered when attempting to monitor the hyperventilation with PetCO2.

Objective To investigate the virological response in hepatitis C virus (HCV)genotype 1b relapsers after 48 weeks of peginterferon/ribavirin (peg-IFN/RBV)combination retreatment,and to explore the predictive value of interleukin (IL )-28B rs12978960 genetic polymorphismon virological response.Methods From 2012 to 2014,genotype 1b chronic hepatitis C (CHC)relapsers in He′nan Provincial People′s Hospital were retreated with combined peg-IFN/RBV for 48 weeks and followed up for 24 weeks off-treatment.Host IL-28B genetic polymorphism was detected.Predictive factors associated with virological response and sustained virological response (SVR)were analyzed.Independent-samples t test was conducted in continuous variables,whileχ2 test or Fisher exact probability test was conducted in counts data.Results A total of 61 patients finished 48 weeks of peg-IFN/RBV combination therapy and were further followed up for 24 weeks off-treatment.Mean age was (46.7 ±12.4)years.Thirty-seven patients (60.7%)were male and 49 were rs12978960 CC genotype.After 48 weeks of retreatment with peg-IFN/RBV and 24 weeks of off-treatment follow-up,40 patients (65 .6%)achieved SVR.Rapid virological response (RVR)and SVR of younger patients were both significantly higher than those of older patients (100.0% vs 67.4% and 85 .0% vs 47.6%,respectively;both P =0.006).IL-28B rs12978960 genotype was predictive to RVR and SVR.Patients with RVR and SVR had higher carriage rates of IL-28B rs12978960 CC genotype compared with those without RVR and SVR (both P <0.05 ).Patients with CC genotype had higher rates of RVR (34.1 % vs 0;χ2 = 10.625 ,P =0.006 ),end-of-treatment virological response (84.1 % vs 70.6%;χ2 =5 .563,P =0.039 )and SVR (77.3% vs 35 .3%;χ2 =9.572,P =0.007)than those with CT/TT genotype.However,there were no statistical differences of extended RVR (34.1 % vs 29.4%;χ2 =0.122,P =0.809)and early virological response (79.5 % vs 82.3%;χ2 =0.612,P =0.964).Conclusions Retreatment with antiviral therapy is necessary in CHC patients with genotype 1b. IL-28B rs12978960 genetic polymorphism is predictive to the SVR of retreatment,especially for patients without RVR,which will provide individualized treatment and optimize the treatment strategy.

The magnetic Illite ( MILT) was firstly prepared by an effective polyol-medium solvothermal method. Based on these 3-( methacryloyloxy) propyl trimethoxysilane ( MILT-MPS), magnetic molecularly imprinted polymers (MMIPs) were further synthesized via atom transfer radical polymerization in a mixture solution of methanol and deionized water. The as-prepared MMIIPs were characterized by FT-IR, TEM), XRD, TGA and vibrating sample magnetometer (VSM), and the results indicated that the MMIIPs exhibited magnetic sensitivity ( Ms =3. 866 emu / g ), thermal stability and a larger specific surface area (109. 58 m2 / g). The batch mode adsorption studies were carried out to investigate the recognition specificity and selective capacity. The Langmuir isotherm model was fitted to the equilibrium data, and the monolayer adsorption capacity of MMIPs at 25℃ was 86. 58 mg / g. The selective recognition experiments demonstrated high affinity and selectivity of MMIPs towards ciprofloxacin ( CIP) over competitive compounds. Combined with high performance liquid chromatographic analysis technology, the prepared MMIIPs were successfully applied to extract and enrich trace CIP in environmental samples with the CIP recoveries from 93. 4% to 98. 3% and the limit of detection of 0. 01 mg / L.

Objective To evaluate the effects of hepatitis B virus on liver function,liver fibrosis,and liver pathological staging at different immune stages.Methods We made a retrospective analysis of 657 patients with chronic hepatitis B diagnosed in the First Hospital of Lanzhou University.Their liver function parameters,liver fibrosis parameters,and hepatitis B virus load were measured by automatic biochemical analyzer,automatic gammaradiation immunity analyzer,and quantitative PCR analyzer,respectively.Effects of hepatitis B virus on liver function,liver fibrosis in different immune stages were analyzed by variance analysis.Effects of hepatitis B virus on liver pathological staging at different immune stages were analyzed by linear trend chi square test analysis.Results In ALT normal chronic hepatitis B patients group,viral load had mild effects on liver function and liver fibrosis parameters.However,in ALT abnormal chronic hepatitis B patients group,viral load had a significant effect on liver function and liver fibrosis parameters,and the effect was most obvious in ALT＞double upper limit of normal group.The specific manifestation was that with viral load increasing,liver function parameters including ALT,AST,TBiL,DBiL,and IBiL increased,while TP and ALB decreased.Liver fibrosis parameters HA,LN,PcⅢ,and CIV all increased (P＜0.05).In ALT normal chronic hepatitis B patients group,viral load had no relationship with liver pathological staging.However,in ALT abnormal chronic hepatitis B patients group,especially ALT≥double upper limit of normal group,viral load was significantly related to liver pathological staging.Conclusion The effects of hepatitis B virus on patients' liver function at different immune stages were different,thus providing evidence-based medicine support for clinical antiviral treatment.

Objective To investigate the gender differences of glucose metabolic network in brains of healthy adults at resting state by 18F-FDG PET.Methods A total of 204 dextromanual,healthy individuals (104 males,average age:(53.45±11.51) years;100 females,average age:(54.11±12.09) years) were enrolled from June 2011 to June 2016 to construct brain metabolic networks.The nodal and global parameters,including clustering coefficient (Cp),characteristic path length (Lp) and betweenness centrality (Cb),were analyzed by graph theory.Permutation test with 1 000 repetitions was used.Results The brain metabolic networks derived from 18F-FDG PET data were with small-world properties in both male group and female group.Compared with Cb in females,Cb in males was significantly reduced in left postcentral gyrus,right angular gyrus and left temporal pole/middle temporal gyrus (permutation test,all P<0.05);and it was increased in left amygdala,left precuneus,right temporal pole/middle temporal gyrus and left inferior temporal gyrus (permutation test,all P<0.05).Comparing with the females,the male group had higher Cp and longer absolute Lp but without significant difference (permutation test,all P>0.05).Conclusions There are gender-related differences of topological structure in whole-brain metabolic networks.Gender should be considered as a covariate while designing experiments,accounting for cerebral metabolic data from normal control and experimental patients as well as making clinical decisions.

Objective To observe the dynamic expression of Nogo receptor (NgR) in spinal cord of rats after spinal cord injury. Methods 108 Sprague-Dawley rats were randomly assigned into normal group, sham operated group and model group, with 36 rats in each group. The model of spinal cord injury was established with the modified Allen's method. The rats were killed 24 h, 3 days, 7 days and 14 days respectively after intervention (9 rats from each group), and expression of NgR in the spinal cord tissue of the rats was detected with immunohistochemistry and Western blotting, and expression of NgR mRNA was detected with fluorescence quantitative PCR. Results There was no significant change in the expression of NgR in the normal group and the sham operated group (P>0.05). The expression of protein and mRNA of NgR was less in the model group 24 h after modeling, dropped to the lowest on the 3rd day, then rapidly peaked on the 7th day, and gradually declined on the 14th day after spinal cord injury. Compared with the normal group, there were significant differences in expression of NgR in immunohistochemistry and Western blotting in the model group at each time point after spinal cord injury (P<0.05). Compared with the sham operated group, there were significant differences in expression of NgR mRNA in the model group at each time point after spinal cord injury (P<0.01). Conclusion The expression of NgR and mRNA peaks on the 7th day after spinal cord injury in the rats, and maintains at high level for a long time, which may associated with the difficulty of axonal regeneration after spinal cord injury.

Objective:To evaluate the dose-response relationship of alfentanil inhibiting gag reflex when combined with propofol in elderly patients undergoing painless gastroscopy.Methods:Patients of American Society of Anesthesiologists physical statusⅠor Ⅱ, aged ≥60 yr, scheduled for elective painless gastroscopy, were selected. Propofol 1.5 mg/kg combined with alfentanil was given intravenously in all the patients. The dose of alfentanil was determined by the Dixon up-and-down method. The initial dose of alfentanil was set at 5 μg/kg. The dose of alfentanil in the next patient was determined according to the development of gag reflex, and the ratio between the two successive doses was 1.1. The median effective dose (ED 50) and 95% confidence interval of alfentanil-induced inhibition of gag reflex when combined with propofol in elderly patients undergoing painless gastroscopy were calculated using the by up-and-down sequential allocation. Results:The ED 50 (95% confidence interval) of alfentanil-induced inhibition of gag reflex when combined with propofol 1.5 mg/kg was 2.8 (2.4-3.2) μg/kg in elderly patients undergoing painless gastroscopy. Conclusion:When combined with propofol 1.5 mg/kg, the ED 50 of alfentanil inhibiting gag reflex is 2.8 μg/kg in elderly patients undergoing painless gastroscopy.

OBJECTIVE: To investigate the mechanism of myopia following intravitreous injection of MK801 (dizocipine maleate) intravitreous injected. METHODS: Three-week-old guinea pigs were divided into six groups: group A (control), group B (3 weeks form-deprivation in right eye), group C ( 3 weeks form-deprivation in right eye + saline), group D (3 weeks form-deprivation in right eye + MK801 1ng), group E (3 weeks form-deprivation in right eye + MK801 10 ng), group F (3 weeks form-deprivation in right eye + MK801 100 ng). The refraction and axial length of the eyes were measured. ncNOS was measured by hybridization in situ, and cyclic GMP (cGMP) concentrations by radioimmunochemistry. The correlation between MK801 concentration and diopter degree, axial length of the eyes, and levels of ncNOS or cyclic GMP were analyzed with linear correlation in the groups C-F. RESULTS: Diopter degree was decreased, axial eye length was shorted and levels of ncNOS and c-GMP were decreased in groups C, D, E and F dependent on the concentration of MK801. The diopter degree had positive correlation with MK801 concentration (r=0.702, P<0.05), while the axial eye length and the levels of ncNOS and cGMP were negatively correlated (r=-0.736, -0.637, -0.725, P<0.05) CONCLUSION MK801 injected into the vitreous humor can restrain myopia by down-regulated the expression of the nitric oxide-cyclic GMP signaling pathway. The effect is concentration dependent.
Animals ; Cyclic GMP ; metabolism ; Dizocilpine Maleate ; administration & dosage ; pharmacology ; Down-Regulation ; Female ; Form Perception ; physiology ; Guinea Pigs ; Injections, Intraocular ; Male ; Myopia ; physiopathology ; Nitric Oxide Synthase Type I ; metabolism ; Sensory Deprivation ; physiology ; Signal Transduction ; drug effects ; Vitreous Body ; drug effects