Objective To study the mobilizing effect induced by low dose irradiation on mouse peripheral blood(stem/progenitor) cells.Methods Peripheral blood CFU-GM was cultivated in methylcellulose semi-solid culture system,and c-kit~+cells were counted by flow cytometry after low dose irradiation or combined with G-CSF.(Results The) CFU-GM and c-kit~+ cells of peripheral blood in irradiated mice were much higher than those in control mice,the CFU-GM started to increase at 24 h after irradiation,reached maximum at 72 h and stayed high level till 96 h.The CFU-GM and c-kit~+cells at 72 h after 75 mGy irradiation were the most.The CFU-GM and c-kit~+cells in semi-dose G-CSF+75 mGy group were much higher than those in simple low dose irradiation group and were close to those in the group dealed with adequate G-CSF.Conclusion Low dose irradiation can mobilize peripheral blood stem/progenitor cells,and low dose irradiation combined with G-CSF can produce synergetic effect.

Objective:To investigate the relationship between monocyte-to-lymphocyte ratio (MLR) in serum and the all-cause mortality in patients with acute paraquat (PQ) poisoning.Methods:Patients with acute PQ poisoning in the First Affiliated Hospital of Nanchang University from December 2013 to October 2018 were retrospectively selected and followed up until July 1, 2019. The primary endpoint was all-cause mortality. Patients were classified into quartiles based on serum MLR and also dichotomized based on the optimal cutoff at a MLR of 0.61, determined from the receiver operating characteristic (ROC) curve analysis. The Kaplan-Meier curve was used for survival analysis. Multivariate Cox regression analysis was performed to identify risk factors, and ROC curve was applied to analyze the predictive efficacy of MLR in all-cause mortality of acute PQ patients.Results:Of the 117 patients included in the study, 49 (41.88%) patients were male and 68 (58.12%) were female with a mean age of 36.91±16.00 years. The total mortality was 59.8% (70/117). On the Kaplan-Meier analysis, patients in quartile 4 had worse prognosis than patients in quartiles 1, 2 and 3 (Log-rank=33.376, P<0.01), and patients with MLR≥0.61 had a significantly higher all-cause mortality than those with MLR<0.61 (Log-rank=26.451, P<0.01). Cox regression model analysis showed that MLR was an independent predictor of all-cause mortality on the quartile analysis (quartile 4 vs. quartile 1: hazard ratio 2.773, 95% confidence interval ( CI): 1.250 to 6.154, P=0.012). ROC curve showed that the optimal cut-off value of MLR was calculated to be at 0.61, the area under the curve (AUC) was 0.684 (95% CI: 0.591-0.767, P=0.0002), with a sensitivity of 47.14% and a specificity of 91.49%. Conclusions:High MLR was associated with mortality risk in patients with acute PQ poisoning, and MLR may be an effective predictor of all-cause mortality in this population.

Objective To investigate the mechanism of capsaicin in treating active psoriasis vulgaris. Methods A total of 42 patients with active psoriasis vulgaris diagnosed by histology and clinical features were given either placebo or 0.025% capsaicin ointment four times daily for 30 days randomly by double-blind method. Vasoactive intestinal polypeptide receptor 1(VIPR1) gene translation in active psoriatic lesions before and after treatment with capsaicin ointment was detected by in situ hybridization. Results There was positive staining of VIPR1 gene in all the layers of psoriatic epidermis (95.5%) before the treatment with capsaicin ointment, but nearly no dyeing in epidermis (18.2%) after the treatment for 30 days. There was nearly no brown staining before and after treatment in control group. Conclusion VIPR1 gene translation in psoriatic epidermis is down-regulated after capsaicin treatment for 30 days.

Objective To observe the role of chronic inflammation in the development of atherosclerosis (AS) by analyzing the expression of TLR4 and NF-κB in artery endothelium. Methods To construct the atherosclerotic animal model, the balloon catheter was used to injure common carotid artery and rabbits were fed the high cholesterol diet. All the rabbits were divided into three groups: control group with the normal diet, high cholesterol diet-fed group and model group (balloon-injured common carotid artery and the high cholesterol diet fed rabbits). The rabbits were sacrificed after 8 weeks and their tissues were collected. Then morphological changes of rabbit common carotid artery were observed by light microscope. The expression of TLR4 and NF-κB in endarterium was displayed using immunochemistry method. Results Both hyperlipidemia and exterior inflammatory stimulation promoted the expression of TLR4 and NF-κB in vascular endothelium (P ＜ 0.01 ). And when both of them were present, the level of TLR4 and NF-κB expression would get higher even than that affected by one of them( P ＜ 0.01 ). Conclusion Both hyperlipidemia and chronic inflammatory process can improve the expression of TLR4 and NF- κB in vascular endothelium in different degree; the inflammatory stimulation would promote the atherosclerosis to some extent; TLR4/ NF-κB would play a role as a bridge between the internal environment changes and the arterial morphological changes.

Objective To investigate the relationship between aquaporin-4 (AQP4) expression level inbrain and dynamic change of brain edema in rats after cardiopulmonary resuscitation (CPR), and to evaluate the in-tervention effects of Edaravone. Method Totally 72 Sprague-Dawley male rats were randomly divided into fourgroups:normal group (n = 6, group A) ,shame-operated group ( n = 6, group B), CPR group including 1 hour,6 hours, 12 hours, 24 hours, and 72 hours after ROSC (5 sub-groups, n = 6for each,group C) ,edaravone-treat-ed group with the same time points as CPR groups(5 sub-groups, n = 6for each,group D). Asphyxia cardiac ar-rest with CPR model was used in group C and group D. Edaravone at a dose of 3.0 mg/kg was given intravenouslyand the same dose of edaravone was administered subcutaneously to the rats of group D after CPR. Anaesthosia,vascular cannulation and endotracheal intubation were pedormed in rats without asphyxia and CPR in group B. Ateach interval, the brain water content was calculated. The AQP4 expression level in brain tissue was determinedusing immunohistocbemical staining. Neurodeficit scores were assessed and pathological change was observed, Re-sults The brain water content in rats of group C increased obviously along with the prolongation of time followingROSC,and reached its peak at ROSC 24h,which was much higher than that of group B (P<0.01). Meanwhile,AQP4 expression in brain had a trend towards increasing and the integral optical density(iOD) and coloratian arearatio(△S) in group C were significantly increased compared with group B ( P<0.01). The trend of changes wasnearly the same as that of the brain water content. The correlation analysis demonstrated that AQP4 expression levelsuch as iOD (r=0.858, P < 0.01 ) and △S ( r = 0.870, P < 0.01 ) were correlated with the brain watercontents apparently. Compared with group C, the brain water content was decreased obviously (P<0.05), iODand △S was down-regulated at the same lime (P<0.01) in group D. The neurodeficit scores increased (P <0.05) and pathological damage was dramatieaUy ameliorated. Conclusions AQP4 expression increased greatly inbrain after CPR and the relationship between AQP4 and brain edema was positively correlated. AQP4 may play arole in the formation of brain edema following CPR. Edaravone could attenuated brain edema after CPR in rats byway of inhibiting the expression of AQP4. It had neuroprotective effect.

To study the significance of the levels of plasma inflammatory cytokines (IL-6,IL-8,IL-10 and TNF-?) in patients with acute deep venous thrombosis (DVT) of lower extremity. Methods Forty untreated DVT cases were selected as the subjects in the DVT group, while thirty healthy subjects, whose ages and genders showed no significant difference with the DVT patients, were collected as the control group. The plasma levels of IL-6, IL-8 and TNF-? were detected by radioimmunoassay (RIA), and the plasma level of IL-10 was measured by enzyme-linked immunosorbent assay (ELISA). Correlation analysis was used to investigate the relationships between the levels of different inflammatory cytokines within DVT group. Results The levels of plasma cytokines in the DVT group were all significantly higher than those in control group (P

0.05). The average FA of the corticospinal tracts (0.472?0.037) of RRMS group was significantly lower than that of normal control group (0.497?0.028) (P0.05). The average FA of the corticospinal tracts correlated with EDSS (r=-0.193, P0.05). Conclusion The average FA of the corticospinal tracts of RRMS patients is significantly abnormal and this index may be suitable in evaluating the functional status of the cerebral type of RRMS patients.

Objective To investigate whether abnormalities can be detected in normal-appearing white matter(NAWM)and normal-appearing white matter(NAGM)in patients with clinically isolated syndrome(CIS)and comparing them to the abnormalities in relapsing-remitting multiple sclerosis(RRMS)by using diffusion tensor imaging(DTI)histogram.To detect the potential relationship between DTI indices of NAWM,NAGM and patient's clinical condition.Methods Nineteen patients with CIS,19 clinically diagnosed RRMS patients and 19 sex-and age-matched healthy volunteers were included in this study.Conventional MRI and DTI images were obtained using Siemens 1.5 T Magnetom sonata scanner.DTI histograms of NAWM and NAGM were obtained after post-processing.The mean value,peak height,peak location of the histogram were used for analysis.All data was statistically processed with SPSS for Windows.Results NAWM average MD was higher and FA was lower in RRMS[MD(0.83±0.04)×10-3mm2/s,FA 0.36±0.03]when compared to CIS[MD(0.79±0.02)×10-3mm2/s,FA 0.40±0.02]and control[MD(0.78±0.02)×10-3mm2/s,FA 0.41±0.01](P＜0.01).But no statistically significant difference was found between CIS and control.The peak height of NAWM average MD histogram was significantly lower in CIS than control(P＜0.05),while the peak location of average FA histogram shifted to the left(P＜0.01).Patients with CIS[(1.08±0.06)×10-3mm2/s]showed significantly higher NAGM average MD than control[(1.03±0.05)×10-3mm2/s](P＜0.05),but,lower than RRMS[(1.18±0.12)×10-3mm2/s](P＞0.01).There were no correlation between DTI indices and EDSS scores in patients with CIS.Moderate correlation between NAGM average MD(r=0.568,P＜0.05)and EDSS scores were found in patient with RRMS.Conclusion NAWM and NAGM abnormalities do occur in CIS which can be detected by DTI.The underlying pathological changes in NAWM and NAGM in CIS may be milder than RRMS as demonstrated by DTI histogram.

Objective: To explore the relationship among somatostatin (SS), neuron-specific enolase (NSE) and early vascular dementia.Methods: A total of 40 patients with early vascular dementia treated in our hospital were selected as vascular dementia group, another 40 inpatients with cerebral infarction (CI) treated during the same period were enrolled as CI group.Plasma NSE and SS levels were compared between two groups during different periods.Results: Compared with CI group at onset, one month and three months after CI, there was significant rise in plasma NSE level[(22.08±7.05) ng/ml vs.(26.39±6.80) ng/ml, (23.92±4.25) ng/ml vs.(28.12±4.06) ng/ml, (25.55±4.72) ng/ml vs.(30.10±4.33) ng/ml], and significant reduction in plasma SS level[(1084.50±133.00) ng/ml vs.(748.30±129.10) ng/ml, (836.40±160.20) ng/ml vs.(624.25±140.50) ng/ml, (690.25±146.30) ng/ml vs.(432.70±151.00) ng/ml]in vascular dementia group, P<0.05 or <0.01.Plasma NSE level gradually rose and SS level gradually reduced along with the time went by(P<0.05 or <0.01).Conclusion: Early dynamic detection of somatostatin and neuron-specific enolase levels in patients with cerebral infarction may help to early diagnosing and treatment of vascular dementia.