Child ; Critical Care ; Humans ; Intensive Care Units, Pediatric ; Medical Records ; Severity of Illness Index

Objective To study such clinical characteristics as number of circulating endothelial progenitor cells (EPCs), cerebral blood flow velocity (CAFV) and platelet count in patients with Alzheimer' s disease (AD). Methods A total of 78 patients were recruited from the outpatient and inpatient departments of our hospital. Patients with AD (n=23), patients with vascular dementia (VaD,n=25) and healthy elderly controls with normal cognition (n=30) were enrolled after matching for clinical data, carotid intima-media thickness (IMT) and Mini Mental State Examination (MMSE). The CAFV was examined with transcranial Doppler (TCD). Peripheral blood EPCs were counted by flow cytometry.Results No statistical significant differences were noted between patients with AD and VaD, and controls on gender, age, body mass index, blood pressure, total cholesterol, triglycerides, platelet and IMT (P＞0.05). Compared with those in control group, the number of circulating EPCs and scores of MMSE and CAFV in patients with AD and VaD were significantly decreased (P＜0.05). After the adjustment of traditional risk factors, thc number of circulating EPCs had a positive correlation with the scores of MMSE (r=0.541, P=0.000). Liner regression analyses showed that body mass index, diastolic pressure,platelet and scores of MMSE were positively correlated to the circulating EPCs number in patients with AD (P＜0.05). Conclusion The reduction of number of circulating EPCs, decreasing the repair capability of cerebrovasculars and inducing poor cerebral perfusion, plays important roles in the cognitive dysfunction of patients with AD.

Objective To study the effect of omeprazole on serum concentration and pharmacokinetics of oxiracetam in Chinese healthy male volunteers and established high performance liquid chromatography (HPLC) method for determination of oxiracetam in plasma.Methods This was a single center,opened,two-way crossover study.Eight healthy Chinese volunteers were screened.The concent ration of oxiracetam in plasma was detected by HPLC before and after omeprazole administ ration.Pharmacokinetics parameters were evaluated by DAS 2.1.1 pharmacokinetics programme.Statistical analysis was performed with SPSS11.5 software.Results The results showed that after oxiracetam was used alone and incombination with omeprazole,pharmacokinetic parameters of AUC0-t,AUC0-∞,MRT0-t,MRT0-∞,tmax,Cmax,t1/2,CL/Fand V/F had no significant difference.Conclusion HPLC method for determinating of oxiracetam concentration in plasma is rapid,simple,accurate and sensitive.There is no influence on the pharmaco-kinetics of oxiracetam when combined with omeprazole in humans.

OBJECTIVETo study PD-1 and PD-L1 expressions during 24 weeks telbivudine antiviral treatment in patients with chronic hepatitis B (CHB) and to explore the relationship between PD-1 expression and HBeAg/HBeAb seroconversion.

METHODSTen CHB cases with HLA-A2 and HBeAg positive were treated with telbivudine 600 mg/d orally for 24 weeks. Fresh blood samples were collected at week 0, 12 and 24 after treatment. HBV-specific CD8+ T cells were expanded in vitro. Cell culture medium were collected for interferon gamma (IFNgamma) detection. Flow cytometry was used to detect the HLA-A type, PD-1, PD-L1 and HBV specific CD8+ T cells. The expressions of PD-1 and PD-L1, the counts of HBV-specific CD8+ T cells in circulating CD8+ lymphocytes, and IFNgamma concentration in culture medium were evaluated during antiviral treatment.

RESULTSAt week 0, 12 and 24 after telbivudine treatment, 7 of 10 patients were HBV DNA undetectable, 2 were HBeAg seroconversion and 2 were HBeAg lose but anti-HBe negative. The frequency of PD-1-positive PBMCs were 52.1%+/-17.0%, 39.1%+/-18.2% and 23.4%+/-16.3% (week 24 vs week 0, P < 0.01) respectively; PD-L1 positive PBMCs were 45.6%+/-15.4%, 34.6%+/-16.2% and 20.9%+/-9.5% respectively(week 24 vs week 0, P < 0.01; week 24 vs week 12, P < 0.05). The frequency of PD-1-positive CD8+ T cells were 76.2%+/-10.4%, 66.5%+/-15.4% and 49.5%+/-25.3% respectively (week 24 vs week 0, P < 0.01; week 12 vs week 0, P < 0.05; week 24 vs week 12, P < 0.05); HBV-specific CD8 cells were 1.3%+/-0.5%, 1.5%+/-1.0% and 2.2%+/-1.5%; IFNgamma levels in cell culture medium were (91.7+/-82.1) pg/ml, (99.4+/-93.5) pg/ml and (109.5+/-86.6) pg/ml. A remarkable decrease of PD-1 and PD-L1 expressions and increase of HBV-specific CD8+ T cells were observed in patients who had HBeAg/HBeAb seroconversion at week 24.

CONCLUSIONSDirect suppression of HBV replication by telbivudine in CHB patients can decrease PD-1 and PD-L1 expressions and restore HBV-specific CD8+T cells. The relationship between the changes of PD-1 expression and HBeAg/HBeAb seroconversion during antiviral therapy in HBeAg-positive patients need to confirm by future study.

Adult ; Antiviral Agents ; therapeutic use ; B7-H1 Antigen ; metabolism ; CD8-Positive T-Lymphocytes ; immunology ; Female ; Hepatitis B e Antigens ; blood ; Hepatitis B virus ; genetics ; Hepatitis B, Chronic ; drug therapy ; metabolism ; Humans ; Male ; Nucleosides ; therapeutic use ; Programmed Cell Death 1 Receptor ; metabolism ; Pyrimidinones ; therapeutic use ; Thymidine ; analogs & derivatives ; Young Adult

Objective To investigate the effects and mechanism of intranasal interferon gamma (IFN-γ)in the treatment of allergic rhinifis.Methods Ovalbumin(OVA)absorbed to aluminum hydroxide was used to construct the allergic rhinitis model(group C),and the normal control group(group A),the allergic rhinitis model group(group B)and beclomethasone dipropionate group(group D) consisted of 8 rats for each.PBS 50 μl was absorbed to group B,IFN-γ1 μg was absorbed to group C and beclomethasone dipropionate 3.5 μg was absorbed to group D on day 31 to day 38 once daily once nasal cavity.The nasal lavage fluid was collected on day 39,and the cellular constituents,levels of interleukin-4 (IL-4),interleukin-5(IL-5)and IgE were determined,together with the pathologic changes and expression of GATA-3 were observed.Results Decrease of eosinophils[(0.0050.003)×104/ml,-x±s]was seen in nasal lavage fluid of group C as comparing with group B[(0.225±0.060)×104/ml,(P<0.01)],and the levels of IL-4(7.8±3.5)pg/ml and IL-5(12.5±4.3)pg/ml decreased significantly in comparing with group B(P<0.01).The serum levels of total IgE(38.5±9.6) g/ml and ovalbumin-specific IgE(19.8±5.4)IU/ml decreased significantly in comparing with those of group B(P<0.01).In group B,mucosal congestion and edema thickening with inflammatory cells infiltration mainly of eosinophils;in group C,the above mentioned changes were much more ameliorated.Immunohistochemistry showed significant increase of GATA-3 expression in the nosal tissue of group B but much lesser than that in group C.Conclusions IFN-γcan inhibit the composition of IL-4 and IL-5.and inhibit the airway inflammation with eosinophilic infiltration and the serum levels of total IgE and ovalbumin specific IgE,probably through the mechanism of restraining the Th2 reaction by blockade of GATA-3 expression in the nasal tissue.

Objective To investigate the influence of nerve growth factor (NGF) in neuropeptides and nerve conduction velocity in rats with experimental diabetic peripheral neuropathy (DNP).Methods Thirty-five 6-week-old male Wistar rats,weighing 175-215 g,were chosen in our study and randomly divided into healthy control group (n=10),DNP model group (n=13) and NGF treatment group (n=12).Rats in the latter 2 group were induced with the interference of administered streptozotocin,and rats in the NGF treatment group were treated with NGF (40 μg/kg).The immunopositive cells percentages of substance P (SP) and calcitonin gene-related peptide (CGRP) in dorsal root ganglion (DRG) were observed and measured; the motor nerve conduction velocity (MNCV) and sensory nerve conduction velocity (SNCV) were measured and compared among the three groups.Results As compared with those in the healthy control group,the immunopositive cells percentages of SP (27.710％±3.471％ vs 44.225％±8.213％) and CGRP (36.360％±12.027％ vs 47.400％±13.723％) in the DRG of DNP model group were significantly decreased (P＜0.05); as compared with those in the healthy control group,the MNCV[(35.80±6.19) m/s vs (55.83±10.30) m/s] and SNCV[(39.62±6.69) m/s vs (47.02 ±7.52) m/s)] of DNP model group were significantly decreased (P＜0.05); however,obvious increase of SP (49.417％±6.753％) and CGRP (53.811％±7.125％),MNCV (41.80±3.45) m/s and SNCV (42.92±6.69 m/s) in the NGF treatment group was noted as compared with those in the DNP model group (P＜0.05).Conclusion The nerve conduction velocity and NGF related neuropeptides (SP and CGRP) decrease in rats with DNP; treatment with NGF promotes the expression ofneuropeptides and increases the nerve conduction velocity.

Objective: To assess the feasibility of HEAD-US scale in the clinical application of hemophilic arthropathy (HA) and propose an optimized ultrasound scoring system. Methods: From July 2015 to August 2017, 1 035 joints ultrasonographic examinations were performed in 91 patients. Melchiorre, HEAD-US (Hemophilic Early Arthropathy Detection with UltraSound) and HEAD-US-C (HEAD-US in China) scale scores were used respectively to analyze the results. The correlations between three ultrasound scales and Hemophilia Joint Health Scores (HJHS) were evaluated. The sensitivity differences of the above Ultrasonic scoring systems in evaluation of HA were compared. Results: All the 91 patients were male, with median age of 16 (4-55) years old, including 86 cases of hemophilia A and 5 cases hemophilia B. The median (P₂₅, P₇₅) of Melchiorre, HEAD-US and HEAD-US-C scores of 1 035 joints were 2(0,6), 1(0,5) and 2(0,6), respectively, and the correlation coefficients compared with HJHS was 0.747, 0.762 and 0.765 respectively, with statistical significance (P<0.001). The positive rates of Melchiorre, HEAD-US-C and HEAD-US scale score were 63.0% (95%CI 59.7%-65.9%), 59.5% (95%CI 56.5%-62.4%) and 56.6% (95%CI 53.6%-59.6%) respectively, and the difference was statistically significant (P<0.001). Even for 336 cases of asymptomatic joints, the positive rates of Melchiorre, HEAD-US-C and HEAD-US scale score were 25.0% (95%CI 20.6%-29.6%), 17.0% (95%CI 12.6%-21.1%) and 11.9% (95%CI 8.4%-15.7%) respectively, and the difference was statistically significant (P<0.001). There were significant changes (P<0.05) in the ultrasonographic score of HA before and after onset of hemorrhage in 107 joints of 40 patients. The difference in variation amplitude of HEAD-US-C scores and HEAD-US scores before and after joint bleeding was statistically significant (P<0.001). Conclusion: Compared with Melchiorre, there were similar good correlations between HEAD-US, HEAD-US-C and HJHS. HEAD-US ultrasound scoring system is quick, convenient and simple to use. The optimized HEAD-US-C scale score is more sensitive than HEAD-US, especially for patients with HA who have subclinical state, which make up for insufficiency of sensitivity in HEAD-US scoring system.
Adolescent ; Adult ; Child ; Child, Preschool ; China ; Hemarthrosis ; Hemophilia A ; Hemophilia B ; Humans ; Male ; Middle Aged ; Ultrasonography ; Young Adult

Objective: To explore the evaluation of joint injury by HEAD-US-C (Hemophilic Early Arthropathy Detection with UltraSound in China, HEAD-US-C) in patients with moderate or severe hemophilia A treated with prophylaxis vs on-demand. Methods: The patients from June 2015 to July 2017 with moderate or severe hemophilia A were examined by ultrasound imaging of the elbows, knees and ankles; Meanwhile the HEAD-US-C ultrasound assessment scale and hemophilia joint health score scale 2.1 (HJHS2.1) were used to score the joint status. The correlation between the HEAD-US-C and HJHS score was performed in prophylaxis group and on-demand group patients, respectively. Results: A total of 925 cases of joint ultrasonography were conducted in 70 patients with moderate or severe hemophilia A. Among patients with moderate hemophilia, the median (IQR) of HEAD-US-C score and HJHS score in on-demand group were significantly higher than those in the prophylaxis group[1 (0, 6) vs 0.5 (0, 3) , z=0.177, P=0.046],[2 (0, 4) vs 2 (0, 3) z=0.375, P=0.007], even though there was no significant difference of the median (IQR) number of annualized target joints bleeding episodes between on-demand and prophylaxis groups[1 (0, 7) vs 1 (0, 5) , z=1.271, P=0.137]. Unlike in moderate cases, on-demand treatment group had more annualized target joints bleeding episodes than prophylaxis group among patients with severe hemophilia[3 (0, 8) vs 2 (0, 8) , z=0.780 P=0.037]. The prophylaxis group compared favorably with on-demand therapy group in terms of HEAD-US-C score[1 (0, 6) vs 4 (0, 7) , z=2.189, P=0.008], and HJHS score[2 (0, 5) , 4 (1, 6) , z=3646, P<0.001]for the severe hemophilia patients. The positive correlation between HEAD-US-C score and HJHS score was identified (P<0.05) , whether on-demand treatment or prophylaxis groups. The correlation coefficient between HEAD-US-C score and HJHS score in on-demand treatment and prophylaxis groups were 0.739 (95% CI 0.708-0.708) , 0.865 (95% CI 0.848-0.848) respectively, and 95% CI didn't overlap (P<0.05) , indicating that the correlation coefficient in prophylaxis group had stronger correlation than that in on-demand group. Conclusions: Clinical effects of prophylaxis were significantly better than those of on-demand treatment in patients with moderate or se-vere haemophilia A. HEAD-US-C scoring system could effectively evaluate joints damage in hemophilia A patients treated with on-demand or prophylaxis, companied by significantly positive correlation with HJHS clinical evaluation system, and provided objective index for clinical effect assessment.
China ; Hemophilia A ; Hemorrhage ; Humans ; Joint Diseases ; Ultrasonography

Objective To discuss the application of 3D laser scanner and computer technology in restoration of the accident scene and reconstruction of the accident process, as well as identification of the driver-passenger relationship. Methods The scene of a traffic accident, the accident vehicle and the vehicle of the same type as accident vehicle were scanned using 3D laser scanner. The accident scene, traces and accident vehicle were integrated using computer technology to restore the accident scene, and the accident process was reconstructed and analyzed by combining the characteristics of the body injuries. Results By restoring the accident scene and reconstructing the accident process with 3D laser scanner, it was determined that Wu was in the driving seat at the time of the accident. Conclusion It is more objective and scientific to use 3D laser scanning technology to restore the accident scene, reconstruct the accident process and analyze the moving track of the driver and passengers in the vehicle. It will help to improve the accuracy of forensic identification of road traffic accidents.
Accidents, Traffic ; Computer Simulation

Spontaneous remission (SR) of leukemia is a rare event in clinic, which possibly correlated with severe infection and sepsis, but its exact mechanism has not been confirmed. Plasmacytoid dendritic cells (pDC) and myeloid dendritic cells (mDC) play a key role in innate and adaptive immunity respectively. A patient with severe infection of staphylococcus aureus acquired completely spontaneous remission (SR), moreover a increased number of pDC were observed, suggesting that bacteria-activated pDC may play an important role in SR. This study was purposed to explore if the bacteria can stimulate pDC successfully and get a functional pDC. Both pDC and mDC were isolated from freshly collected, leukocyte-rich buffy coats from healthy blood donor and leukemic patient with SR by using MACS and FACS. The pDC were cultured in RPMI 1640 medium and were stimulated with different kinds of bacteria and the expression of CD40, CD86 and HLA-DR on the cell surface was analyzed by flow cytometry. The cytokine (IFN-α, IL-12, IFN-γ, IL-2, IL-4, IL-10) production was measured by using ELISA kits. The results showed that the stimulation with staphylococcus aureus and pseudomonas aeruginosa resulted in the maturation of pDC, which secrete a large number of IFN-α and promote the differentiation of naive CD4⁺ T cells to Th1 cells. The activated pDC expressed high level of CD40 and CD86 and showed higher T cell stimulatory capacities. It is concluded that staphylococcus aureus and pseudomonas aeruginosa can activate pDC, the activated pDC secrete high quantity of IFN-α. This result suggests that bacteria stimulated pDC may play a key role in SR of leukemia following severe infections.
CD4-Positive T-Lymphocytes ; Dendritic Cells ; immunology ; microbiology ; Humans ; Interferon-alpha ; Interleukin-10 ; Interleukin-12 ; Interleukin-2 ; Interleukin-4 ; Leukemia ; diagnosis ; immunology ; microbiology ; Remission, Spontaneous ; Staphylococcus aureus