BACKGROUND:Umbilical cord stem cel s mainly derive from ful-term infants, and common culture methods include tissue-attached method and trypsin-digestion mehod. However, effects of different culture methods on the separation of umbilical cord mesenchymal stem cel s remain many disputes. OBJECTIVE:To observe the effects of different culture methods on umbilical cord mesenchymal stem cel s. METHODS:Umbilical cords of 30 healthy ful-term and caesarean delivery infants were selected, and cultured using tissue-attached method or trypsin-digestion method to isloate and culture human umbilical cord mesenchymal stem cel s. Meanwhile, cel growth was measured by flow cytometry. RESULTS AND CONCLUSION:The fusiform-shaped cel s began to separate from the umbilical cord tissue that was primary cultured using tissue-attached method, and 10 days later, the cel fusion reached 80%;after the umbilical cord was cultured using col agenase-trypsin digestion for 5 days, a smal amount of adherent cel s with different shapes appeared, and the fiber-like cel s reached 80%of confluence until 2-week culture. There was no significant difference in the growth of umbilical cord mesenchymal stem cel s cultured by different culture methods (P>0.05). Moreover, cel s cultured by two methods were al positive for CD13, CD29, CD44 and CD105. These results demonstrate that human umbilical cord mesenchymal stem cel s exhibit a high success rate in primary culture using tissue-attached method, which is superior to the trypsin-digestion method.

In bacterial cells, selection of the proper division site at midcell requires the specific inhibitions of septation at two other potential sites, locate at each of the cell pole. This site specific inhibition of septation is mediated by the gene products of the min locus including three genes: minC, minD, and minE. Genetic and expression studies have revealed that MinC encode an inhibitor of division that is activated by MinD and toplogically regulated by MinE. Recent localization studies of functional Min proteins tagged with green fluorescent proteins have provide some insight into this topological regulation and revealed a fascinating oscillation of MinC and MinD between the cell halves. In this paper, it is reviewed that the progress on the regulation mechanism of the division site in bacterial cells by introducing the structure and their interaction of the study on Min proteins.

Objective To explore the pathological mechanism of brain function and structure in young patients with major depressive disorder by diffusion tensor imaging(DTI)and resting state functional magnetic resonance imaging(fMRI).Methods Sixteen participants diagnosed with major depression (MD) and 16 healthy age and gender-matched controls(HC) were recruited. Resting state fMRI and DTI brain scans were performed on all participants. A voxel-based method (VBM) was used to analyze the DTI datasets, and regional homogeneity (ReHo) approach was applied to preprocess the fMRI datasets. The value of fractional anisotropy (FA) and ReHo maps were obtained in the whole brain.Results FA values in the MD group were significantly lower than those of the healthy controls in the white matter of the left middle temporal gyrus, right middle frontal gyrus, left medial frontal gyrus, right precentral gyrus, left angular gyrus, left fusiform gyrus, left superior temporal gyrus, right middle temporal gyrus, right sub-gyral, left insula, and left pyramis (P＜0.01). ReHo in the MD group decreased in the left superior frontal gyrus, right superior frontal gyrus, left middle frontal gyrus, right middle frontal gyrus, left medial frontal gyrus, right medial frontal gyrus, left paracentral lobule, right paracentral lobule, right inferior parietal lobule, left postcentral gyrus, right postcentral gyrus, left middle occipital gyrus, left lingual gyrus, right putamen, right cingulate gyrus, right cuneus, left superior temporal gyrus, and right middle temporal gyrus (P＜0.01). Conclusion Abnormality of brain white microstructure and function exist widely in young patients with major depressive disorder. Abnormal connection of structures and function between the brain areas may be the key reason for the depression.

Objective To explore the effect of Acanthopanax senticosus injection (ASI) on brain multi-infract dementia rats. Methods Thirty-six male Wistar rats were randomly divided into 3 groups:control group, model group and ASI group. The multi-infract dementia rat models were set up by injecting mini-sludged blood in carotis internal arteries, learning and memory function of rats were determined by Morris water maze and Step-down test, the section of rat cerebral cortex and hippocampus were stained with haematoxylin eosin (HE). Results Compared with model group, latency in ASI group shortened significantly at 2nd,5th and 6th day, the distance shortened at 1st,2nd,5th and 6th day. The seeking tactics of ASI trgated rats improved in the Morris water maze test. The error times of ASI treated rats decreasd at 1st and 2nd day in Step-down test; ASI did not reduce significantly pathological changes of vascular dementia rats. Conclusion ASI has effect of treatment on multi-infract dementia rats.

Objective To explore the mechanism of therapeutic effect of Donepezil hydrochloride on Alzheimer's disease(AD) rats.Methods According to weight,36 rats were divided into normal group,model group and Donepezil hydrochloride group.AD rat model was set up by injecting D-galactose into abdominal cavity for seven weeks,learning and memory function of rats was determined by using Morris water maze and Step-down test.The section of rat cerebral cortex and hippocampus were stained with haematoxylin eosin(HE),and the effect of Donepezil hydrochloride was observed by detecting the MDA content and SOD activity in cerebral tissue.Results Compared with model group,latency and distance of Donepezil hydrochloride rats shortened on the fourth day and the fifth day,starting angle of Donepezil hydrochloride rats shortened on the fourth day and the fifth day in the Morris water maze test,error times of Donepezil hydrochloride rats decreased on the first day and the second day in Step-down test;MDA content in cerebral tissue of Donepezil hydrochloride rat was deceased(P

Objective To observe the influence of XueShuanXinMaiNing(XSXMN)in the behavior and structures of cerebral cortex and hippocampus of the rats withβamyloid protein(Aβ)-induced Alzheimer’s disease(AD),and to explore its therapeutic effects on the rat AD.Methods 100 male Wistar rats were selected.According to weight, the rats were randomly divided into sham operation group, model group, positive drug group (donepezil hydrochloride,1.75 mg· kg-1 ),XSXMN 1.1 g· kg-1 group and XSXMN 2.2 g· kg-1 group. The rat AD models were made by injecting Aβinto hippocampus.After oral administration for 15 d,Morris water maze test, dark avoidance task and pathology test were performed.Results In Morris water maze test,compared with model group,the latency and swimming distance to platform of the rats in XSXMN 1.1 g·kg-1 group were decreased on the 2nd,4th and 5th day(P<0.05 or P<0.01);in XSXMN 2.2 g·kg-1 group,the latency to platform of the rats were decreased from the 3nd to 6th day(P<0.05 or P<0.01),the swimming distances to platform of the rats were decreased from the 3rd to 5th day(P<0.05 or P<0.01).On the 7th day,in XSXMN groups,the times of passing platform,time of staying on platform,distance of staying on platform,time of staying in effective area, distance of staying in effective area, time of staying on platform/total time, distance of staying on platform/total distance,time of staying on platform/total time were all increased significantly(P<0.05 or P<0.01)within 90 s. In dark avoidance task,compared with model group,the error latency and the error times of the rats in XSXMN groups had no obvious change on the 2nd day.The pathological results showed that there were degeneration nerve cells and necrosis nerve cells in the rat cerebral cortex in XSXMN groups,while in the rat hippocampus there were less number of nerve cells with obscure cell layer and many degeneration and necrosis cells were found;compared with model group,there was no obvious improvement.Conclusion XSXMN can improve the learning and memory function of the AD rats.

0.05).Conclusion Donepezil hydrochloride do not improve the learning and memory function of normal under age rats.

Objective To investigate the effect of hot compress with traditional Chinese herbs with wine and vinegar on lumbago after cesarean section. Methods Ninety patients with lumbago after cesarean section were divided into the control group and the observation group equally according to their admission number. Both groups were cured by the injection at the pressure pain point, the observation group by hot compress of traditional Chinese herbs of Reyanbao with wine and vinegar. The treatment effect between both groups were observed. Results The effective rates of the experiment group and the control group were 93.3%and 68.9%, respectively. The difference was statistically significant (χ2=12.433, P<0.05). Conclusions Based on injection on the pressure pain point, lumbago after cesarean section can be effectively relieved with the extra treatment by hot compress with traditional Chinese herb of Reyanbao with wine and vinegar. The treatment is simple and safe and worthy of being applied clinically.

Objective To investigate the anti-proliferation effect of peroxisome proliferator-activated receptor γ(PPARγ)agonist troglitazone(TGZ)on leukemic Raji cells and its mechanisms.Methods Raji cells in culture medium in vitro were given different concentrations of TGZ(0～60 μmol/L)for 24,48 and 72 h.The inhibitory rates of the cells were measured by MTT assay,cell apoptotic rate was detected by flow cytometry(FCM),agarose gel electrophoresis was used to observe the DNA ladder,and western blotting was used to analyzed the variation of apoptosis related proteins bcl-2,Bax and Survivin.Results TGZ(over 20 μmol/L)could inhibit the growth of Raji cells and cause apoptosis remarkably,the suppression was both in time-and dose-dependent manner.DNA ladder was observed after the cells treated by TGZ for 72 h,and western blotting analysis revealed that anti-apoptotie proteins Survivin and bcl-2 were decreased remarkably while pro-apoptotic protein Bax increased significantly after the cells were treated by TGZ for 48 h.Conclusion PPARγ agonist TGZ can inhibit the growth and induce apoptosis on Raji cells significantly,downregnlating the expression of Survivin and bcl-2 as well as upregulating of Bax expression of Raji cells may be one of its most important mechanisms.

OBJECTIVE： To study the pharmacokinetics of domestic carvedilol and relative bioavailability of carvedilol capsule in Chinese volunteer.METHODS： Eight volunteers orally took a single dose of 30mg test preparation and 25mg control preparation in a random crossover and self-control method.Samples were determined by RP-HPLC fluorescent method.RESULTS： Profiles of carvedilol in vivo could be described as open two-compartment model.The main pharmacokinetics parameters of test and control preparations were as follows： Cmax（98.89± 27.60） ng/ml、 （70.06± 27.29） ng/ml， Tmax（0.4 849± 0.2 635） h、 （0.6 037± 0.1 707） h， CL（0.1 621± 0.08 057） （mg· h） /（ng· ml） 、 （0.1 796± 0.09 198） （mg· h） /（ng· ml） ， V/F(c)（0.2 127± 0.1 260） mg/(ng· ml)、 （0.2 777± 0.1 860） mg/（ng· ml） ， T1/2β （2.011± 1.709） h、 （1.959± 1.156） h， AUC（233.1± 97.12） ng/（ml· h） 、 （168.0± 70.61） ng/（ml· h） ； Mean relative bioavailability in man was (111.3± 15.18)％ .CONCLUSION： The results can be used for design of therapeutic scheme.