BackgroundThe effects of extremely low frequency electromagnetic fields (ELF-EMFs) on public health have attracted wide attentions.The association of the thermal effect of ELF-EMFs with cancer and ocular tissue damage has been of concern.However,the pathological changes of scleral tissue after exposure to ELF-EMFs as well as the relationship between these changes and myopia are still poorly understood.ObjectiveThe present study was to investigate the molecular pathological changes of human fetal scleral fibroblasts (HFSFs) after exposure to ELF-EMFs in vitro and to explore the possible mechanism in the occurrence and development of myopia.MethodsHFSFs were cultured and passaged and then exposed to 50 Hz electromagnetic fields,and HFSFs that did not receive the irradiation of ELF-EMFs were used as the control group.The expression of collagen type Ⅰ (COL1A1 ) mRNA and matrix metalloproteinase-2 (MMP-2) mRNA in cultured HFSFs were detected by real-time qualitative polymerase chain reaction (real-time PCR) under different magnetic field intensites (0,0.1,0.2,0.5,1.0 mT) and different exposure time (0,6,12,24,36,48 hours).Cell proliferation assay of HFSFs was detected by the cell counting kit 8 ( CCK8 ) assay.The expression levels of COL1 A1 and MMP-2 proteins in HFSFs were further confirmed by immunofluorescence staining.Results The expression of COL1A1 mRNA was significantly down-regulated under the exposure of 0.2 mT ELF-EMFs for 6 hours,in comparison with the control group;moreover,it decreased in parallel with the increased of flux density (0.099±0.008 vs.0.050±0.004) (P =0.009 ).The expression of MMP-2mRNA was up-regulated conspicuously after exposure to 0.1 mT ELF-EMFs for 24 hours,and it increased with exposure time in comparison with the control group ( 0.009 ±0.001 vs.0.018±0.003 ) ( P =0.038 ).Proliferation of HFSFs (A450) was inhibited following the exposure to 0.2 mT ELF-EMFs for 24 hours in comparison with the control group (P =0.009 ).The expression of COL1 A1 in the experimental group was decreased,compared with the control group,but the expression of MMP-2 was increased.ConclusionsELF-EMFs inhibit the proliferation of HFSFs and expression of COL1 A1 in HFSFs,which might be one of the reasons for the development of myopia.

BACKGROUND:Related studies have showed that poly D,L-lactide-co-glycolide can effectively package antisense oligonucleotides, smal interfering RNA, microRNA. Poly D,L-lactide-co-glycolide can better protect them against the destruction of the enzymes in vivo and have slow the drug release. Therefore, the number of drug administration can be reduced to achieve a long-term and effective therapeutic effect. ＜br> OBJECTIVE:To prepare poly D,L-lactide-co-glycolide-CXCR4-miRNA-nano-particles and to research the characteristics of the prepared nanoparticles. ＜br> METHODS:Poly D,L-lactide-co-glycolide-CXCR4-miRNA nanoparticles were prepared by double emulsion-evaporation process. Ultraviolet spectrophotometry was utilized for measurement of encapsulation efficiency and drug-loading rate, observing the shape of nanoparticles by transmission electron microscope, and measuring the size and distribution of nanoparticles by laser particle size analyzer. Sustained-release characteristics of nanoparticle suspension were observed in phosphate buffer. ＜br> RESULTS AND CONCLUSION:The prepared nanoparticles were spherical-shaped, smooth, evently distributed and inadhesive. The particle size was mainly distributed within 143-502 nm, with an average diameter of 280 nm. The average drug loading was (0.515±0.023)%, the average encapsulation ratio was 50.2%and difference between batches was smal . The nanoparticles could slowly release in vitro and the process initial y experienced the fast-release stage, and then reached a basical y stable platform stage at day 14. These finding indicate that the process to prepare poly D,L-lactide-co-glycolide CXCR4-miRNA-nanoparticles by double emulsion-evaporation is simple. The prepared nanoparticles are wel targeted and exhibit sustained-release effects.

OBJECTIVE: To study the effects of Wenyang Chubi Decoction (WYCBD), a compound traditional Chinese herbal medicine, on connective tissue growth factor (CTGF) and collagen-I (COL-I) in a mouse model of scleroderma. METHODS: Scleroderma was induced in BALB/c mice by daily local injection of bleomycin for three weeks and the mice were randomly divided into untreated, WYCBD-treated and normal saline (NS) treated groups, with another group of BALB/c mice as normal control. WYCBD and NS were given orally for one month respectively. Histopathology in the skin and lungs of the mice were examined. The CTGF and COL-I expressions in the skin or skin lesions were detected by immunohistochemical Elivision assay. RESULTS: The expression levels of CTGF and COL-I in the untreated group were significantly higher than those in the normal control group (P<0.05). Compared with the NS-treated group, the WYCBD-treated group had significant improvement in the skin and lung histopathology and remarkably decreased expression levels of CTGF and COL-I (P<0.05). CONCLUSION: Scleroderma mice showed high expressions of CTGF and COL-I in the skin. WYCBD had the effects of decreasing the CTGF and COL-I expressions and improving the skin fibrosis.

Objective To explore the gene expression pattern of sample of human ovarian carcimoma Method The difference in gene expression between normal and neoplastic human ovarian tissues were investigated,we described the assembly and utilization of a 512 member cDNA microarray Result Thirty seven genes expressed in ovarian cancer were screened out,14 genes were up regulated,23 genes were down regulated Conclusion cDNA microarray for analysis of gene expression pattern is an effective method to identify novel ovarian cancer associated genes

Objective To evaluate the effects of ELISPOT (enzyme-link immunospot) test using different samples in diagnosing tuberculous pleurisy. Methods Using T-Spot-TB kit to detect interferon-γlevel in pleural effusion and periph?eral blood from 164 patients with tuberculous pleural effusion and 102 patients without tuberculous pleural effusion. Number of spot forming cells (SFCs) as well as the specificity and sensitivity of the tests were compared between these two methods (ELISPOT using leural effusion or peripheral blood). Results The area under the ROC curve was 0.947 in pleural effusion Elispot test while it was 0.905 in peripheral blood Elispot test. The sensitivity of pleural effusion ELISPOT test in diagnosis of tuberculous pleurisy (95.1%) was significantly higher than that of peripheral blood ELISPOT test (89.0%). What’s more, the specificity of pleural effusion ELISPOT test in diagnosis of tuberculous pleurisy (90.2%) was higher than that in diagno?sis of peripheral blood ELISPOT test (88.2%). Conclusion The pleural effusion ELISPOT test is more valuable than periph?eral blood ELISPOT in the diagnosis of tuberculous pleuritis.

Child, Preschool ; Fatal Outcome ; Female ; Humans ; Respiratory Tract Infections ; complications ; Shock, Septic ; etiology ; Streptococcal Infections ; complications

This study aims to explore and analyze the condition of concurrent diseases and medicine use of traditional Chinese medicine (TCM) and western medicine among the patients with insomnia. One thousand and sxity seven cases of data from 20 national hospitals' hospital information system (HIS) databases were collected. The frequent concurrent diseases included hypertension (26.9%), brain blood supply insufficiency (24.93%), cerebral infarction (19.49%), blood lipoprotein disturbance (15.28%), coronary heart disease (14.15%), headache (10.68%), chronic gastritis (8.81%), type 2 diabetes mellitus (7.87%), depressive disorder (7.4%) and anxiety disorder (6.65%). The 10 most frequently-used western drugs included alprazolam (35.99%), aspirin (25.4%), olanzapine (24.18%), cinepazide (23.06%), flupentixol & melitracen (18.74%), zolpidem (18.37%), oxiracetam (15.65%), estazolam (15%), aniracetam (13.4%) and piracetam (13.31%). The 10 most frequently-used TCM included Shuxuening injection (16.4%), Shuxuetong injection (15.18%), extract of ginkgo biloba leaf (14.71%), gastrodin (12.46%), Dengzanxixin injection (11.34%), Xueshuantong (8.53%), Danhong injection (6.37%), compound liquorice tablet (5.81%), Sanqi Tongshu capsule (5.72%) and sowthistle-leaf ixeridium injection (5.34%). Among all combined uses, the most frequent western drug use was alprazolam and olanzapine, while combined use of hypnotic drug and Huoxuehuayu formula is the most frequent. This study concludes that the concurrent diseases mainly include cardio-cerebrovascular diseases, metabolic disorders and anxiety-depression disorders, with increasing tendency of diseases types by ages, especially for cardio-cerebrovascular diseases. The most frequently-used hypnotic is alprazolam in the insomnia patients, and it is worth being concerned about the off-label use of olanzapine as an antipsychotic for the treatment of insomnia However, due to the fact that all cases data are from the inpatients, these findings have some limitations.
Adolescent ; Adult ; Aged ; Aged, 80 and over ; Alprazolam ; therapeutic use ; Anti-Anxiety Agents ; therapeutic use ; Antipsychotic Agents ; therapeutic use ; Benzodiazepines ; therapeutic use ; Cerebral Infarction ; drug therapy ; epidemiology ; etiology ; Coronary Disease ; drug therapy ; epidemiology ; etiology ; Diabetes Mellitus, Type 2 ; drug therapy ; epidemiology ; etiology ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Headache ; drug therapy ; epidemiology ; etiology ; Humans ; Hypertension ; drug therapy ; epidemiology ; etiology ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Sleep Initiation and Maintenance Disorders ; complications ; drug therapy ; epidemiology ; Young Adult

Objective:To investigate the predicting value of European system for cardiac operative risk evaluation ( EuroSCORE ) and sino system for coronary operative risk evaluation ( SinoSCORE ) in early quality of life of patients after coronary artery bypass surgery (CABG).Methods:A total of 218 consecu-tive patients who underwent CABG from March 2010 to January 2013 were evaluated with both systems before operation .Health related quality of life ( QoL) was estimated by using 36-item short form health survey ( SF-36) preoperatively and postoperatively in order to evaluate the predicting value of the two sys -tems in early post-operative QoL.Calibration was evaluated by Hosmer-l,emeshow goodness-of-fit test. Discrimination was tested by determining the area under the receiver operating characteristic ( ROC ) curve .Results:There was no significant difference between the accumulation of the EuroSCORE and SinoSCORE in the all patients (t=-0.904, P=0.368), When using Wilcoxon test on life quality in the preoperative and postoperative patients respectively ,the data showed that the quality of life improved significantly in various dimensions of the postoperative patients (Z=-2.886, P<0.001).Except for bodily pain (BP) and mental health (MH), statistically significant correlation was found between the preoperative risk evaluation scores and the postoperative QoL scores (r:-0.203 to -0.493, P<0.05). Logistic regression analyses indicated that both the scores emerged as the independent predictor for a relatively worse QoL ( OR>1 , P<0 .05 ) .Furthermore , the EuroSCORE predicted the outcome with a higher OR.For SinoSCORE the Hosmer-Lemeshow test was significant (P=0.628) and the area under ROC curve was 0.754.For the EuroSCORE the Hosmer-Lemeshow test was significant (P=0.538) and the area under ROC curve was 0.854.Conclusion:Both EuroSCORE and SinoSCORE could be viewed as a predictor for several aspects of postoperative QoL , while EuroSCORE might have a greater predicting value.

Objective To explore the potential mechanisms of mesenchymal stem cell (MSC) therapy in ischemia/reperfusion injury (IRI)-induced acute kidney injury (AKI). Methods Forty-five C57/BL6 male mice were randomly divided into three groups: sham group, IRI group, and IRI+MSCs group, with 15 mice in each group. The IRI-induced AKI model in mice was reproduced by clamping both renal pedicles for 35 minutes. In the sham group, both kidneys were exposed, but their pedicles were not clamped. Six hours after reperfusion, mice in IRI+MSCs group received 100 μL of MSCs (1×104 /μL) isolated from the bone marrow from C57/BL6 mice via tail vein, while the mice in the IRI group received same amount of normal saline. Blood samples were harvested at 48 hours after reperfusion, and levels of serum creatinine (SCr) and blood urea nitrogen (BUN) were determined. The changes in renal pathology were observed by microscopy with PAS staining, and the tubular injury and acute tubular necrosis (ATN) scores were calculated. The number of leukocytes (CD45+) infiltrated in kidney at 24 hours and 72 hours after reperfusion was measured with flow cytometry. The number of neutrophils (Ly-6G+) and macrophages (F4/80+) infiltrated in kidneys at 24 hours and 72 hours after reperfusion was determined by immunofluorescence. Results There was significant increase in the related parameters in IRI group compared with those of sham group. The levels of SCr (μmol/L) and BUN (mmol/L) were 180.3±8.8 vs. 9.7±3.5, and 1 121.1±8.3 vs. 9.4±2.3, both P < 0.01. The score of tubular injury was 4.80±0.55 vs. 0 at 48 hours after reperfusion. The quantity of leukocyte (CD45+) infiltration in kidney at 24 hours and 72 hours after reperfusion was increased (×105 cells/g: 60.50±2.56 vs. 19.46±4.83, 42.00±1.87 vs. 14.70±3.74, both P < 0.01), and the number of neutrophils (Ly-6G+) and macrophages (F4/80+) infiltrated in kidney at 24 hours and 72 hours after reperfusion was also increase although the number of leukocytes infiltrated in kidney was significantly lower at 72 hours after reperfusion than that at 24 hours. There was significant lowering of the levels of SCr and BUN [SCr (μmol/L): 99.0±8.0 vs. 180.3±8.8, BUN (mmol/L): 84.5±7.6 vs. 112.1±8.3, both P < 0.01] in IRI+MSCs group, compared to IRI group. For the degree of tubular necrosis in two groups, the tubular injury scores were 2.60±0.55 vs. 4.80±0.55 (P < 0.05). The number of leukocytes infiltrated in kidney at 24 hours and 72 hours after reperfusion (×105 cells/g) were 24.20±4.53 vs. 60.50±2.56, 31.70±3.15 vs. 42.00±1.87 (both P < 0.01). The number of neutrophils was lowered despite (the number of macrophages was increased). However, the number of infiltrated leukocytes was significantly more in IRI+MSCs group at 72 hours than that at 24 hours (×105 cells/g: 31.70±3.15 vs. 24.20±4.53, P < 0.05). Conclusion MSCs could protect against IRI induced AKI by reducing the total number of leuckocytes, especially that of the neutrophils infiltrating into ischemic kidney and by recruiting macrophages into ischemic kidney.

Objective To develope a novel rabbit carotid body and carotid common artery model in vivo for the simulation of various intermittent hypoxia (IH) intensities, IH durations, IH reoxygenation (ROX) durations and continuous hypoxia (CH) modes.Methods Forty-five adult New Zealand rabbits (2.5～3.0 kg) were anesthetized while spontaneous breathing kept intact.The tissue surrounding the fight earetid common artery and carotid sinus nerve (CSN) were cleared and "single" chemoreceptor bundle of the CSN was revealed.Then suction electrodes were placed and CSN afferent activity was monitored and recorded carefully.The fight common carotid artery was exposed, cannulated to distal part and its proximal part was ligated.Preparations were challenged by changing the PO2 of the gas mixture equilibrating the perfusate.Alternatively perfusion (2 mL/min) of equilibrated porfusate bubbled with normoxia or hypoxia gas mixtures formed IH/ROX cycles in carotid common artery,simulating the pattern of hypoxic episodes seen in obstructive sleep apnea syndrome (OSAS), or with continuously perfusing hypoxia perfusate to form CH modes.All the perfusing procedures were regulated by a customized computer-controlled set and monitored using O2 gas analyzer.After the systematic exposures, carotid body, carotid common artery part distal to cannula,and carotid bifurcation were harvested as samples.Results The frequencies and average amplitudes of CSN chemoreceptor bundles afferent activities with normoxia peffusion were (0.17±0.03) impulse/s and (46.2±4.4) μV, and with hypoxia perfusion were (0.6±0.09) impulse/s and (87.4±6.6) μV, respectively.PO2 was (139±1.5) nun Hg in normoxia perfusate and (35.2±1.3) mm Hg in hypoxia perfusate.Conclusion This new carotid body and carotid common artery model is a valuable tool to study neurological and biochemical changes in various IH and CH modes.