OBJECTIVE:To study the chemical constituents in the fruiting bodies of armillariella tabescens for searching active leading compounds.METHODS:Compounds were isolated from methanol extract of armillariella tabescens by chromatography column.RESULTS:Six compounds were isolated and identified as methyl oleate(1),stearic acid(2),3?-hydroxyergosta-5,7,22-triene(3),armillarisin B(4),5-hydroxy-uracil(5) and cerebroside B(6),respectively.CONCLUSION:Compounds 1,2,3,5,6 were firstly isolated from the fruiting bodies of armillariella tabescens.

Objective To explore the value of magnetic resonance perfusion imaging of 3D arterial spin labeling(3D-ASL)in the diagnosis of transient ischemic attack(TIA).Methods 78 of patients were diagnosed TIA on MR routine scan [T1 WI,T2 WI,T2-FLAIR,diffusion weighted imaging(DWI)],magnetic resonance angiography(MRA)and 3D arterial spin labeling(3D-ASL).The re-sult were analyzed by Chi-square test.Results In 78 patients,the abnormal routine scan was 0 case(0%);abnormal MRA 41 cases (52.6%);abnormal 3D-ASL 47 cases(60.2%);combination with each other were 60 cases(76.9%).29 cases with artery stenosis and abnormal ASL,12 case with artery stenosis and normal ASL,19 cases with normal vascular and abnormal ASL,18 cases with normal vascular and normal ASL.Conclusion 3D-ASL is better than routine magnetic resonance sequences in the diagnosis of TIA,which is convenient and should be a routine scanning sequence of TIA.3D-ASL,MRA and DWI have their own advantages and disadvantages, combination use can improve the diagnosis accuracy of TIA.

OBJECTIVE:To explore the effect of dabigatran etexilate on coagulation indexes and safety of elderly patients with persistent atrial fibrillation. METHODS:52 elderly patients with persistent atrial fibrillation were randomly divided into obser-vation group and control group by random number table,26 cases in each group. Creatinine clearance rate in observation group was higher than 30 ml/min,110 mg Dabigatran etexilate capsule was orally given,bid;when 15-30 ml/min,55 mg capsule was orally given,bid. Control group orally received Warfarin sodium tablet with initial dose of 2.5 mg,qd,according to international normal-ized ratio (INR) after 3-5 days till maintained in 2.0-3.0. After 3 months,coagulation indexes [prothrombin time (PT),activated partial thromboplastin time (APTT),thrombin time (TT),INR,platelet count (PLT),fibrinogen (FIB)] before and after treat-ment,incidences of clinical events (cerebral embolism,cerebral hemorrhage,fatal bleeding,the remaining parts of embolism, death)and adverse reactions in 2 groups were compared. RESULTS:There was no significant difference in PT,APTT,TT,PLT and FIB between 2 groups before treatment(P>0.05);after treatment,PT and INR in 2 groups significantly increased,and obser-vation group was obviously better than control group,the difference was statistically significant(P<0.05). No cerebral hemorrhage or fatal hemorrhage occurred in the two groups. There was no significant difference in the incidence of cerebral embolism between 2 groups (P>0.05);the incidence of remaining parts of embolism,death in observation group significantly lower than control group,the difference was statistically significant(P<0.05). The incidence of adverse reactions in observation group was significant-ly lower than control group,the difference was statistically significant (P<0.05). CONCLUSIONS:Dabigatran etexilate shows good coagulation effect on elderly patients with persistent atrial fibrillation,which can effectively improve PT and INR levels and reduce the incidences of clinical events,with good safety.

Venous thromboembolism includes deep venous thrombosis and pulmonary embolism. It is a more common and preventable complication in neurology. The prevention of venous thromboembolism is an important component in the treatment of the patients with cerebral hemorrhage. The measures include mechanical prevention and drug prevention. The mechanical prevention measures include intermittent pneumatic compression devices and pressure gradient elastic stockings. Studies have suggested that anticoagulants also plays an important role in the prevention of venous thromboembolism. The comprehensive and systematic understanding of the prevention of venous thromboembolism wil help to guide the clinical therapy and improve the outcomes of patients after primary intracerebral hemorrhage.

Objective To investigate the effect of dexamethasone on the toxicity of bupivacaine in murine neurons.Methods Murine neuroblastoma cell line N2a was obtained from ATCC cell bank (USA). The cells were cultured in 10% fetal cow serum/MEM culture medium and divided into 4 groups voup I control (Con); group II bupivacaine ( Bup); group Ⅲ dexamethasone (Dex) and group IV Dex + Bup. The culture medium contained bupivacaine 900 μmol/L in group Bup and dexamethasone 1 μmol/L in group Dex respectively. In group Dex + Bup ( IV ) Bup was added to the culture medium with a final concentration of 900 μmol/L at 12 h after pretreatment with Dex 1 μmol/L. The cells were inoculated in 24 well plates (0.5 ml in each well, 24 wells in each group) and 10 cm culture dishes (7 ml in each dish, 4 dishes in each group). The release rate of LDH was calculated and the morphology of the cells and nucleus condensation (by Hoechst 3334224 fluorescent staining) was detected at 9 h of incubation in 24 well plates. The mitochondrial transmembrane potential (by JC-1 assay) and phosphorylation of Akt and ERKs (by Western blot) were measured at 5 h of incubation in 24 well plates and in culture dishes respectively. ResultsBupivacaine caused severe damage to the N2a cells as evidenced by increase in LDH release and nucleus condensation (apoptosis), dephosphorylation of Akt and ERKs, decrease in mitochondrial transmembrane potential and severe morphological changes. Dexamethasone pretreatment significantly attenuated bupivacaine-induced neurotoxicity. Conclusion Dexamethasone can protect N2a cells from bupivacaine-induced neurotoxicity through stabilization of mitochondrial transmembrane potential and inhibition of dephosphorylation of Akt and ERKs.

To better evaluate neuromuscular function of patients with stroke related motor dysfunction, we proposed an effective corticomuscular coherence analysis and coherent significant judgment method. Firstly, the related functional frequency bands in the electroencephalogram (EEG) were extracted via wavelet decomposition. Secondly, coherence were analysed between surface electromyography (sEMG) and sub-bands extracted from EEG. Further more, a coherent significant indicator was defined to quantitatively describe the similarity in certain frequency domain and phase lock activity between EEG and sEMG. Through the analysis of corticomuscular coherence during knee flexion-extension of stroke patients and healthy controls, we found that the stroke patients exhibited significantly lower gamma-band corticomuscular coherence in performing the task with their affected leg, and there was no statistically significant difference between their unaffected lag and the healthy controls, but with the rehabilitation training, the bilateral difference of corticomuscular coherence in patients decreased gradually.
Case-Control Studies ; Electroencephalography ; Electromyography ; Exercise Therapy ; Humans ; Knee ; physiology ; Muscle, Skeletal ; physiology ; Range of Motion, Articular ; Stroke Rehabilitation

Objective To establish the proper review rules for the microscopic screening of urine analyzed by UF-1000i automatic urinalysis work station (composed of UF-1000i urine flow cytometer and AX-4030 urine dry chemical analyzer).Methods A total of 2 839 random urine samples were collected at Chinese People′s Liberation Army General Hospital from September 2009 to February 2010, and were analyzed using UF-1000i urinalysis work station.The parameters obtained from UF-1000i and AX-4030 included RBC, WBC, CAST and ERY, LEU, PRO.After analysis by urinalysis work station, each urine sample was examined microscopically by two technologists using double-blind method.The average results got from the two technologists were regarded as the judging criterion.Based on the criterion, the review rules for the 2 839 urine samples tested by urinalysis work station were created and adjusted, and the true positive rate, false positive rate, true negative rate, false negative rate and review rate of these review rules were calculated.After that, 299 randomly selected urine samples were tested to validate these review rules.Omission diagnostic rate and review rate were used to assess the clinical practicability of the review rules.Results Thirty seven rules for microscopic review and twenty seven rules without further microscopic examination were set up based on six parameters using UriAccess 3.0 Software.The microscopic examination result was taken as the judging criterion, the consistency rate of these rules was 81.11%(2 311/2 839), the true positive rate was 40.51%(1 150/2 839), the false positive rate was 16.17%(459/2 839), the true negative rate was 41.00%(1 164/2 839), the false negative rate(omission diagnostic rate) was 2.43%(69/2 839) and the review rate was 18.28% (519/2 839).Additional 299 urine samples were assayed using UriAccess3.0 software to further verify these review rules.The consistency rate was 82.27%(246/299), the true positive rate was 36.12%(108/299), the false positive rate was 16.39%(49/299), the true negative rate was 46.15%(138/299), the false negative rate(omission diagnostic rate) was 1.34%(4/299), the review rate was 19.06%(57/299). The 4 false negative samples selected by these review rules did not come from the nephropathy department or the urology department.Microscopic results of RBC and WBC form these 4 samples ranged 3-8 cells/HP. Thus, these review rules could avoid the missed diagnosis of those patients with severe renal dysfunction.Conclusion The review rules established from this study for the UF-1000i urinalysis work station can effectively detect abnormal urine samples and improve the efficiency and the quality of urinalysis in routine clinical practice.

Objective To study the change of erythrocyte indices and serum iron in hyperthyroidism rats .Methods SD female rats were randomly divided into hyperthyroidism group and control group .Hyperthyroidism rats were induced by intragastric ad‐ministration of Euthyrox (Levothyroxine) and their blood and serum were obtained after administration of 1-8 weeks ,respective‐ly .And the control rats were given normal saline .Levels of T3 ,T4 and TSH were determined by a radioimmunoassay .Erythrocyte index were measured by automatic blood cell analyzer .Serum iron concentration and total iron binding capacity were determined by chromatometry .Results The concentration of serum T3 and T4 increased in hyperthyroidism rats ,whereas the TSH decreased . RBC was higher in hyperthyroidism rats at 2-8 weeks compared with the control rats (P<0 .05) .HCT was higher in hyperthy‐roidism rats at 1-8 weeks compared with the control rats (P<0 .01) .MCV was lower in hyperthyroidism rats at 2-8 weeks com‐pared with the control rats (P<0 .05) .MCHC was lower in hyperthyroidism rats at 1 -8 weeks compared with the control rats (P<0 .01) .RDW SD and RDW CV was higher hyperthyroidism rats at 1-2 weeks compared with the control rats(P<0 .01) .Ser‐um iron concentration and total iron binding capacity increased in hyperthyroidism rats at 4 -8 weeks compared with the control rats(P<0 .01) .Conclusion The hyperthyroidism rats in the present study is absent significant manifestation of anemia ,whereas the hypochromic changes of erythrocyte is significant .Serum iron concentration and total iron binding capacity increase in hyperthy‐roidism rats ,which demonstrate the iron utilization disorder .

Objective To explore the ultrasonographic features of the gallbladder with malaria in stage of attack (MSA) at Sudan.Methods A total of 67 cases of MSA patients were divided into common type of malaria (CM) and sever malaria (SM).All patients underwent routine abdominal ultrasound examination and the ultrasonographic features of the gallbladder were divided into type Ⅰ,Ⅱ and Ⅲ according to the volume of gallbladder,thickness of the gallbladder wall and chole stasis.The relationship between clinical types and the ultrasonic types were analyzed.Then the differences of liver function among normal,Ⅰ,Ⅱ and Ⅲ types were compared statistically.Results In all of the 67 MSA patients,52 cases were CM and 15 cases were SM.The gallbladder ultrasonography showed that normal gallbladder were in 14 cases,type Ⅰ in 28 ca ses,type Ⅱ in 19 cases,type Ⅲ in 6 cases.The ultrasonic types of the gallbladder had significant difference in SM patients (type Ⅰ 3 cases,type Ⅱ 7 cases,type lⅢ 5 cases) and CM patients (normal 14 cases,type Ⅰ 25 cases,type Ⅱ 12 cases,type Ⅲ 1 case;P＜0.001).Ultrasonic types of the gallbladder had no difference between Chinese and Sudanese (P＞ 0.05).There were statistical significant differences of liver function among normal,Ⅰ,Ⅱ and Ⅲ types of the gallbladder (P＜0.001).Conclusion Most of the MSA patients have ultrasonic changes of gallbladder.And there are more serious pathological changes of gallbladder in SM than that in CM.

Objective To investigate the potential role of CXC chemokine ligand 16 (CXCL16)/CXC chemokine receptor 6 (CXCR6) pathway in the progression of diabetic nephropathy (DN). Methods 8?week old male db/db mice were randomly divided into DN group and DN inflamed group. 10% casein was subcutaneously injected to induce the DN mouse model with inflammation. In vitro, HK?2 cells were treated with high glucose (HG), and IL?1β+HG to investigate the effect of inflammatory stress on HK?2 cells. Further knockdown CXCL16 was mediated by RNA interference to determine the effects of CXCl16, then cells were divided into HG+IL?1βgroup, HG+IL?1β + siCXCL16 group and HG + IL?1β + vehicle group. Changes of renal function in mice were assessed by 24 h proteinuria and N?acetyl?β?D?glucosaminidase (NAG) during 8 weeks. The ultra?microstructure was checked by electron microscopy at 8th week. Lipid accumulation in kidneys and HK?2 were observed by Filipin staining and quantitative assay of intracellular free cholesterol. The protein expressions of CXCl16, CXCR6, a disintegrin and metalloproteinase?10 (ADAM10), fibronectin and α smooth muscle actin (α?SMA) in renal tissue were detected by immunohistochemistry and Western blotting. The mRNA and protein expressions of CXCl16, CXCR6, ADAM10, fibronectin andα?SMA in HK?2 cells were detected by real?time PCR and Western blotting, and protein expressions of CXCl16, CXCR6 and ADAM10 in HK?2 cells were also tested by cell immunofluorescence. Results Mice in DN inflamed group had higher 24 h proteinuria and NAG than those in DN group, and the differences between two groups shown statistical significance at 8th week (all P<0.05). Compared with DN mice, DN inflamed mice had more vacuoles within renal tubular cells, with mitochondrial swelling, deformation and decrease. Lipid accumulation and protein expressions of fibronectin and α?SMA were increased in DN inflamed group when compared with DN group (all P<0.05). Further, the expressions of CXCL16, CXCR6, ADAM10 were significantly increased in DN inflamed group (all P<0.05). In vitro, the mRNA and protein expressions of CXCL16, CXCR6, ADAM10, fibronectin and α?SMA, and lipid accumulation were increased in high glucose plus IL?1βgroup when compared with high glucose group (all P<0.05). However, after siRNA of CXCL16 transfection, the mRNA and protein expressions of CXCL16, CXCR6, ADAM10, fibronectin andα?SMA were down?regulated in HG+IL?1β+siCXCL16 group as compared with high glucose+IL?1βgroup (all P<0.05). Furthermore, lipid accumulation was decreased (P<0.05). Conclusion Inflammation accelerates tubulointerstitial injury in DN partly through the activation of CXCL16 pathway, which may facilitate the lipid accumulation in tubular epithelial cells.