Objective To investigate the effect of bone marrow mesenchymal stem cells(MSCs) transplation on reparing carotid artery endothelium in S-D rat injured by balloon.Methods Twenty four male Sprague-Dawley(SD) rats underwent balloon overstretch injury in the right common carotid artery and were randomly divided into treatment group(MSCs suspension injected) and control group(phosphate buffered solution injected).Animals were killed to assess vessel morphology and histology at 14 and 28 days after injury in the two groups.Results By H-E staining,morphometric analysis at 14 and 28 days showed that MSCs injection after balloon injury significantly reduced neointimal thickening compared with PBS injection after balloon injury [(0.57?0.06) cm vs(1.09?0.07) cm at 14 days,P

AIM: To establish the quality standard for Gujing Tablets (Olibanum, Rhizoma Cyperi, Radix Aucklandia, etc.). METHODS: Olibanuln, Rhizoma Cyperi, Radix Aucklandia were identified by TLC, and costuslactone content in Radix Aucklandia was determined by HPLC. RESULTS: The TLC identification was highly specific and spots were clear. Costuslactone in Radix Aucklandia showed a good linear relationship. The average recovery was 99.1% (RSD=1.2% and n=5). CONCLUSION: The methods are simple, reliable and have a good reproducibility and can be used for the quality control of Gujing Tablets.

BACKGROUND: The method of culture purified sinoatrial node cell is important in investigating its ultrastructural characteristics and autorhythmic mechanisms.However,the corresponding method has not been standardized.OBJECTIVE: To summarize the localization,cultivation and purification of sinoatrial nodes isolated from newborn rabbits,and to study the morphological characters of primary cultured pacemaker cells.METHODS: Hearts of the newborn rabbits(within 24 hours)were embedded in paraffin for hematoxylin-eosin staining,The location of sinoatrial nodes was observed under an optical microscope,the morphology of sinoatrial nodes cells were observed by light microscope and electron microscope.RESULTS AND CONCLUSION: Sinoatrial nodes localized in the anterior wall of the superior vena cava and the posterior laterial wall of right atrium.There was about 0.32 mm between its lowest point and sulcus terminalis.Three distinct types of cells were observed among the cultured cells of sinoatrial nodes: spindle,spider and polygon.The spindle cells occupied the greatest proportion of the cultured cells(59.6±7.3)%.The spontaneous contraction frequency of spindle cells was the highest among the constracting cells(145±9)times per minute.The ultrastructure observation showed that myofibrils and other organelles in spindle cells were sparse and significantly decreased in number compared with triangle cells.There was no significant difference between triangle cells isolated from sinoatrial nodes and from atrial muscle.Sinoatrial nodes could be harvested along the anterior root of the superior vena cava down to the posterolateral sulcus.Among the cultured cells from neonatal rabbit sinoatrial nodes,the spindle cells with small body and fast pulse frequency are pacemaker cells.

Objective To compare the clinic features of neuromyelitis optica (NMO) and multiple sclerosis(MS).To compare the positive rate of NMO-IgG in NMO,MS and other related diseases,and determine whether it can be considered as a biomarker for differential diagnosis.Methods Detected serum NMO-IgG in 34 NMO patients,22 MS patients,24 high risk syndrome,5 clinical isolated syndrome,and 35 patients with other neumlogical diseases.Compared the clinic features(onset age,severity,prognosis,MRI lesions,autoimmune antibodies,CSF)of 34 NMO patients and 22 MS patients.Results The onset age of NMO is older than that of MS.It is more severe and with worse prognosis than MS.Longitudinal spinal cord lesions are easily found in NMO.NMO-IgG positive rate in NMO and high risk syndrome patients are 58.8% (20/34)and 45.8%(11/24)respectively,which are higher than that in MS(1/22),clinical isolated syndrome(1/5)and other neurological diseases(1/35;x2=37.2,P<0.01).The positive rate may have a relationship with the length of spinal cord lesions.Condusions MS and NMO are probably different diseases.NMO-IgG positive rate in NMO is significandy higher than that in MS,it can be considered as a biomarker for differential diagnosis.

Objective To investigate alteration and cross link of the vascular endothelium dependent diastolic function (FMD) and platelet endogenous L-arginine/NOS/NO pathway before and after percutaneous coronary intervention (PCI) .Methods The study included two groups :normal control group(17 cases) and PCI group(20 cases) .FMD of brachial artery and NO production , NOS activity ,L-arginine transport in platelets were examined respectively before ,immediately ,24 h and 72 h after PCI and the rela-tionships between them would subsequently be analysed .Results The preoperative FMD ,content of NO2 - ,NOS activity and L-ar-ginine of PCI group significantly decreased than the normal control group (P<0 .01) ,and further decreased in the immediate post-operative(P<0 .01) .Gradually recovered 24 h after surgery ,72 h after surgery ,the FMD ,NO2 - ,L-arginine transport ,NOS activity restored to the preoperative level (P>0 .05) .The analysis showed the obvious positive correlation between FMD and content of NO2 - or NOS activity ,or L-arginine transport of platelet ,respectively(P<0 .01) .Conclusion The pathway of platelet L-arginine/NOS/NO was significantly positively correlated with FMD and the detection of platelet L-arginine/NOS/NO can reflect the changes of vascular endothelial function with PCI .

50 adult male SD rats were divided randomly into 5 groups:A,B,C1 ,C2,C3(n =1 0).The rats in roup A was used as a blank controls.The rats in group B and C were with LPS induced periodontitis,those in group C1 ,C2 and C3 received 0.2 ml of baicalin daily injection(0.01 ,0.1 and 1 .0 μg/ml respectively)into the gingival sulcus of the teeth with periodontitis for 3 days.The rats were sacri-ficed 7 days after treatment and periodontal tissues of the related teeth were observed by histology.In group C1 ,C2 and C3 the periodontal inflammation was significantly slighter than that in group B,the osteoclasts count was as following:B >C1 >C2 >C3 >A(P <0.05).The study suggests that baicalin can inhibit destructive effect of LPS to periodontal tissue of rats.

Gluconobacter oxydans is known to oxidize glucose to gluconic acid (GA), and subsequently, to 2-keto-gluconic acid (2KGA) and 5-keto-gluconic acid (5KGA), while 5KGA can be converted to L-(+)-tartaric acid. In order to increase the production of 5KGA, Gluconobacter oxydans HGI-1 that converts GA to 5KGA exclusively was chosen in this study, and effects of carbon sources (lactose, maltose, sucrose, amylum and glucose) and nitrogen sources (yeast extract, fish meal, corn steep liquor, soybean meal and cotton-seed meal) on 5KGA production were investigated. Results of experiment in 500 mL shake-flask show that the highest yield of 5KGA (98.20 g/L) was obtained using 100 g/L glucose as carbon source. 5KGA reached 100.20 g/L, 109.10 g/L, 99.83 g/L with yeast extract, fish meal and corn steep liquor as nitrogen source respectively, among which the optimal nitrogen source was fish meal. The yield of 5KGA by corn steep liquor is slightly lower than that by yeast extract. For the economic reason, corn steep liquor was selected as nitrogen source and scaled up to 5 L stirred-tank fermentor, and the final concentration of 5KGA reached 93.80 g/L, with its maximum volumetric productivity of 3.48 g/(L x h) and average volumetric productivity of 1.56 g/(L x h). The result obtained in this study showed that carbon and nitrogen sourses for large-scale production of 5KGA by Gluconobacter oxydans HGI-1 were glucose and corn steep liquor, respectively, and the available glucose almost completely (85.93%) into 5KGA.
Bioreactors ; Carbon ; chemistry ; Culture Media ; chemistry ; Fermentation ; Gluconates ; metabolism ; Gluconobacter oxydans ; metabolism ; Industrial Microbiology ; Nitrogen ; chemistry

Objective:To explore the development characteristics of empathy in adolescents and the relations with aggression.Methods:With multistage stratified random sampling method,15 738 middle school students were selected from 5 provinces across China.The Buss-Warren Aggression Questionnaire Revised in China (BWAQ-RC) and Interactional Reactivity Index (IRI-C)was used to measure adolescents'aggression and empathy.Results:Girls had higher level of empathy than boys (P <0.001).Age and gender were interacted in predicting empathetic con-cern (P <0.001).Perspective taking was significant negative predictor of indirect aggression,physical aggression, hostile and angry (P <0.001),while empathetic concern was significant positive predictor of indirect aggression, verbal aggression,hostile and angry (P <0.001).Empathy was divided into 4 class used the K-Means clustering a-nalysis,namely,low empathy class,high perspective taking class,high empathetic concern class,high perspective taking and empathetic concern class.In contrast to other classes,individuals in low empathy class were more likely to involve in physical aggression (P <0.05),and individuals in high level of perspective taking and empathetic con-cern class were related with less physical aggression and elevated verbal aggression (P <0.05).Individuals in high empathetic concern class exhibited more indirect aggression,hostile and anger than other subgroups (P <0.05). Conclusion:The unbalance development of the two components of empathy may be closely correlated with different conduction of aggressive behaviors.

Objective To analyze the reasons of catheter fracture of implantable vascular access devices and to explore the prevention and handling measures. Methods A retrospective analysis was carried in 3 887 adult patients with implantable vascular access devices and 13 had catheter fracture. The clinical features and causes were analyzed and the successful handling measures were summarized. Results Of 3 887 cases, a total of 13 (0.33%) catheter fracture occurred. The incidence rate of catheter fracture via subclavian jugular venipuncture was 3.70%,(6/162) , via internal jugular venipuncture was 0.18% (7/3 725), via internal jugular venipuncture was significantly lower than that via the subclavian venipuncture (χ2=47.505,P=0.000). There had no statistical differences between the left and right of the two puncture ways(P=0.707,0.682). Conclusions Catheter fracture is one of the serious complications in the process of use and maintenance of implantable vascular access device. Choosing appropriate surgical method, strengthen maintenance education, specificating the operation procedure, closing observation and other measures can not only reduce the occurrence of the catheter fracture, but also can dealt with catheter fracture in time, which could ensure the safety of patients' life.

Objective To study methylation status of the Runx3 gene in occurrence and development of children malignant lymphoma.Methods The bone marrow specimens of 48 children diagnosed as malignant lymphoma were included into experimental group.20 children with non-malignancy were included into control group.Methylation-specific polymerase chain reaction (MS-PCR) was used to detect methylation status of Runx3 gene in bone marrow cells.The reverse transcription-polymerase chain reaction (RT-PCR) was used to detect mRNA expression of Runx3 gene.Results MS-PCR assay results showed that 31 cases expressed Runx3 gene methylation in experimental group,the positive rate was 64.6 ％ (31/48),but no one was detected in control group (20 cases),the difference between two groups was significant (x2 =15.7,P ＜0.05).Dynamic observation of 42 cases in experimental group showed the declining of Runx3 methylation positive rate.RT-PCR assay results showed that all 20 cases in the control group expressed Runx3 gene mRNA,all cases with methylation status of the Runx3 gene in the experimental group didn’ t expressed Runx3 gene mRNA.In experimental group,9 cases of clinical remission expressed Runx3 gene mRNA,and 1 case of relapsed didn’ t expressed Runx3 gene mRNA.Conclusion Runx3 gene shows a high methylation status in bone marrow cells of malignant lymphoma children,so that blocked the expression of Runx3 gene,which is closely related to the occurrence and development of children malignant lymphoma.