Alzheimer's disease (AD) is a common progressive degenerative disease of the central nervous system. It's also a main cause for dementia in presenium and senectitude. In the past few years, the discoveries in vitro expansion of neural stem cells (NSCs) indicate a new way for recovery and replacement of damaged neurons as well as reconstruction of the neural circuit, and offer a useful future therapy for AD. There are two main promising approaches in NSCs replacement therapy. They are endogenetic approach, inducing proliferation and differentiation of endogenetic NSCs, improving self-repair of central nervous system, and exogenous approach, ransplantation of exogenous tissue and promoting proliferation of endogenous NSCs. However, it may not become truth before the mechanism of NSCs' proliferation, migration, differentiation and it's integration with the host tissues to be elucidated.

Objective To compare the postoperative effect of pars plana vitrectomy,phacoemulsification and intraoeular lens (IOL)implantation with silicon oil removed,phacoemulsification and IOL implantation.Design A retrospective case-control study.Par- ticipants 91 cases(104 eyes)of proliferative diabetic retinopathy with tractive retinal detachment or vitreous hemorrhage were per- formed cataract surgery with IOL implantation.Methods All patients were followed up average 6 months,in whom 52 eyes with pars plana vitrectomy,phacoemulsification and IOL implantation(combined group),and the other 52 eyes with silicon oil removed,pha- coemulsification and IOL implantation(sequential group).The differences of the postoperative visual acuity and inflammatory reactions of the anterior chamber between the two groups were analyzed.Main outcome measures Visual acuity and inflammatory reactions of the anterior chamber.Results There were 14/52 eyes with best corrected visual acuity more than 0.1 in combined group and 8/52 eyes in the sequential group after the surgeries(X~2=-6.87,P=0.07) .Corneal edema happened in 16/52 eyes in combined group and 6/52 eyes in sequential group 1 week after the surgeries(X~2=11.53,P=0.001).Keratic precipitate happened in 20/52 eyes in combined group and 9/52 eyes in sequential group after the surgeries(X~2=5.79,P=0.019) .Conclusions The incidence of postoperative anterior chamber in- flammation is higher in Phacoemulsification combined with pars plana vitrectomy group.

Objective To explore the effects of mitogen-activated protein kinase (MAPK) pathway by estradiol induced vascular endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF) in endometrial cancer Ishikawa cells.Methods The experiments were divided into 4 groups:E2 group (Ishikawa cells treated with 1 p mol/L estradiol for 30 minutes); inhibitor group:including Ishikawa cells treated with 10 μmol/L Bibf1 120 (Bibf1 120 group),or treated with 2.5 μmol/L Ponatinib (Ponatinib group),or treated with 10 p mol/L U0126 (U0126 group) for 60 minutes; inhibitor + E2 group:including Ishikawa cells treated with 10 μmol/L Bibf1120 (Bibf1120 + E2 group),or treated with 2.5 μmol/L Ponatinib (Ponatinib + E2 group),or treated with 10 μmol/L U0126 (U0126+ E2 group) for 60 minutes following incubation with 1 μmol/L estradiol for 30 minutes; control group:only adding the culture medium without serum DMEM.(1) Western blot analysis was used to detect phosphorylation extracellular signal-regulated kinase 1/2(p-ERK 1/2) protein expression with stimulation in different concentrations of estradiol (0.01,0.1,1,10,100 μmol/L).(2) Quantitative fluorescent reverse transcription (qRT)-PCR and western blot analysis was used to test the level of mRNA and protein of VEGF,bFGF,MAPK kinase 1/2 (MEK1/2),extracellular signal-regulated kinase 1/2 (ERK1/2),p-ERK1/2 and phosphorylation MEK1/2 (p-MEK1/2).Flow cytometry were used to examine the cell cycle,and transwell chamber assay were used to detect the cell migration in different groups.Results The expression of the p-ERK1/2 protein at 0.01,0.1,1,10,100 μ mol/L were 0.16±0.03,0.10±0.03,0.41 ±0.04,0.19±0.03,0.19±0.03,there were significantly higher than that in control group(0.05±0.00,P＜0.05),and which was more obvious at the concentration of 1 μmol/L estradiol.The expression level of VEGF,bFGF mRNA and protein in E2 group were higher than those in the control group (P＜O.05).VEGF mRNA and protein in Bibf1120+E2 group were higher than those in E2 group.The expression of MEK1/2,ERK1/2 mRNA protein in E2 group were higher than those in control group (P＜0.05).The expression of MEK1/2,ERK1/2 mRNA or p-MEK1/2,p-ERK1/2 protein in Bibf1120 + E2 group,Ponatinib+E2 group or U0126+E2 group were lower than those in E2 group(all P＜0.05).Percentage of G1 phase [(53.6±3.2)％] and S phase[(29.2±4.2)％] in E2 group was significantly different with those in control group respectively(P＜0.05).Percentage of G1 phase[(66.8±2.6)％,(63.1±2.6)％ and (63.3±0.4)％] and S phase [(25.4±1.9)％,(25.0±3.8)％ and(23.8±0.5)％] in U0126+E2 group,Bibf1120+E2 group or Ponatinib +E2 group was also significantly different with those in control group (all P＜0.05); percentage of G1 phase and S phase in U0126+E2 group was significant difference with those in Bibf1120+E2 group or ponatinib+E2 group (P＜0.05).The number of cell colony in E2 group (110± 17) was more than those in control group (65±8) ;the number of cell colony in U0126+E2 group(28±4),Bibf1120+E2 group(38±5) or Ponatinib+E2group(42±6) were significant different with those in E2 group (P＜0.05),the number of cell colony in U0126+E2 group was significant difference with those in Bibf1 120+E2 group or Ponatinib+E2 group (all P＜0.05).The results shown that the abilities of proliferation and cell migration were significantly increased in cells after estradiol stimulation.Conclusion Estradiol inducing the production of VEGF and bFGF could activate MAPK pathway through ER-independent manner,further promote development.

Objective To observe the dynamic changes of leptin and transforming growth factor (TGF)-β1 in formation of liver fibrosis in rats,and the role of leptin in liver fibrosis.Methods Six rats were served as normal control(0 week)and killed at the beginning of the study.Thirty-two rats were subcutaneously injected with 60%CCl4 to establish fibrotie models.The rats were than sacrificed at 3,6,9 and 12 weeks with eight each.Expressions of leptin mRNA,Ob-Rb mRNA,TGF-β1 mRNA and TGF-βRⅡmRNA in liver were detected by reverse-transcription polymerase chain reaction(RT-PCR).Expression of Smad3 and Smad7 proteins were determined by Western blot.The expression and loealization of leptin,Ob-Rb and TGF-β1 in liver tissue were detected by immunohistochemistry.Results The expression of leptin mRNA,Ob-Rb mRNA,TGF-β1 mRNA and TGF-βR Ⅱ mRNA in 0 week were 0.43±0.45,0.57±0.21,0.19±0.12 and 0.30±0.22,respectively,and increased to 1.27±0.19,1.70±0.29,1.70±1.00 and 2.14±1.02 at 12 weeks(P＜0.05).At the same times the level of Smad3 increased from 0.44±0.24 at 0 week to 1.75±1.05 at 12 weeks.While the expression of Smad7 was decreased from 1.35±0.12 at 0 week to 0.74±1.21 at 12 weeks(P＜0.05).The expressions of leptin,Ob-Rb and TGF-β1 were increased with the formation of the fibrosis(P＜0.01).Conclusions With the development of liver fibrosis,the expressions of leptin,Ob-Rb mRNA and protein are increased and improved the formation of the fibrosis.Its mechanisms may be correlated with up-regulation of TGF-β1,TGF-βR Ⅱ and Smda3 expressions and down-regulaton of Smad7 expression by leptin.

Objective To evaluate the effect of hyperthermic intraperitoneal perfusion on blood coagulation in patients undergoing laparoscope-assisted radical surgery for gastric cancer.Methods Forty patients of both sexes, aged 40-60 yr, weighing 50-80 kg, of American Society of Anesthesiologists physical status Ⅰ or Ⅱ , undergoing elective radical surgery for gastric cancer, were equally randomized into control group (group C) and hyperthermic intraperitoneal perfusion group (group HIP).The patients were treated with hyperthermic intraperitoneal perfusion for 1 h after the end of the radical surgery in group R.Before induction of anesthesia (T0) , immediately before hyperthermic intraperitoneal perfusion (T1), and at 1 h of hyperthermic intraperitoneal perfusion (T2) , venous blood samples were collected, blood coagulation was measured using thromboelastography, and the reaction time, coagulation time, α angle and maximal amplitude were recorded.Results Compared with group C, no significant change was found in blood coagulation parameters at T0 and T1 (P＞0.05), the reaction time and coagulation time were significantly increased, and α angle and maximal amplitude were decreased at T2 in group HIP (P＜0.05).Conclusion Hyperthermic intraperitoneal perfusion can improve blood coagulation in the patients undergoing laparoscope-assisted radical surgery for gastric cancer.

Objective To investigate the changes of plasma adrenomedullin(ADM),endothelin-1(ET-1) in infants with severe pneumonia complicated by acute congestive heart failure,and its relationship with heart function.Methods Forty-seven bronchopneumonia patients in their acute phase were divided into three groups:group A1,severe pneumonia complicated by acute congestive heart failure without congenitive heart disease(CHD)(n=15);group B1,severe pneumonia complicated by acute congestive heart failure with CHD(n=12);group C1,mild bronchopneumonia(n=20).A2,B2 and C2 groups were the convalescence groups of A1,B1 and groups C1 respertively.Group D,20 healthy infants were used as control group.Plasma ADM,ET-1 levels of patients in acute phase(pre-treatment)and convalescent phase and controls were measured by specific radioimmunoassary.Results 1.The plasma ADM levels significantly increased in the acute phase of A1,B1 and C1 compared with healthy controls(Pa0.05).3.The plasma ADM,ET-1 levels in A2 and B2 groups significantly decreased compared with those in group A1 and B1(Pa0.05).Conclusions The ADM,ET-1 play very important roles in the pathophysiological processes of pneumonia and congestive heart failure in infants.ET-1 may play an important role in the pathogenesis of severe pneumonia in infants complicated with congestive heart fai-lure.The level of plasma ET-1 is related with the degree of congestive heart failure.

Cleistocalycis Operculati Cortex is the dry bark of Cleistocalyx operculatus. It is the raw material of Compound Hibiscuse which is external sterilization antipruritic drugs. The quality standard of Cleistocalycis Operculati Cortex in Guangdong Province "standard for the traditional Chinese medicine" (second volumes) only contains TLC identification. It is unable to effectively monitor and control the quality of Cleistocalycis Operculati Cortex. A reversed-phase HPLC method was established for the determination of 3, 3'-O-dimethylellagic acid from Cleistocalycis Operculati Cortex and the content was calculated by external standard method for the first time. Under the selected chromatographic conditions, the target components between peaks to achieve effective separation. 3,3'-O- dimethylellagic acid standard solution at the concentration of 1.00 - 25.0 mg x L(-1) showed a good linear relationship. The standard curve was Y = 77.33X + 7.904, r = 0.999 5. The average recovery was 101.0%, RSD was 1.3%. The HPLC method for the determination of 3,3'-O-dimethylellagic acid in Cleistocalycis Operculati Cortex is accurate and reliable. It can provide a strong technical support for monitoring the quality of Cleistocalycis Operculati Cortex.
Chromatography, High Pressure Liquid ; methods ; Chromatography, Reverse-Phase ; methods ; Drugs, Chinese Herbal ; analysis ; Plant Bark ; chemistry ; Syzygium ; chemistry

Objective:To evaluate the effects of Sander Ⅱ appliance in the orthodontic treatment of adolescent ClassⅡmalocclusion. Methods:15 cases (6 male and 9 female)of adolescent ClassⅡ malocclusion with mandibular retrution were treated with Sander Ⅱappliance.Pre-treatment and post-treatment Lateral cephalogram measurements were traced and analyzed in terms of 28 indicators. SPSS 19.0 software package was used for paired t test.Results:After treatment,15 patients achieved remarkable improvement in the maxillofacial profile and normal overjet of teeth.The cephalometric analysis showed that ANB,OJ,H°and U1-E decreased(P <0. 05),SNB,B-OLP,Pg-OLP(mm),Ii-OLP,Ms-OLP(mm),Mi-OLP(mm),N-Me,ANS-Me,S-Go,Go-Gn,N'-Pg'/FH,Cm-Sn-Ls and Pg-Pg'increased(P <0.05).There was no significant change in SN-MP,SN-OL and Y-axis before and after treatment. Conclusion:Sander Ⅱ appliance is effective in the treatment of adolescent early Class Ⅱmalocclusion.

Objective To investigate the association of the Cx37 polymorphism of connexin gene with essential hyper?tension (EHT) in Xinjiang Han and Kazak population. Methods In Xinjiang region, 500 EHT patients (EHT group) were in?cluded in this study including Kazak 250 cases and Han 250 cases. Five hundred healthy volunteers (NT) were used as NT group including Kazak 250 cases and Han 250 cases. The values of age, body mass index (BMI), systolic blood pressure (SBP) and diastolic blood pressure (DBP), and other general clinical features were compared between two groups. The poly?morphism of Cx37 gene rs1630310, rs697372 and rs705193 SNP were compared between EHT and NT groups in the two eth?nic groups. Hardy-Weinberg equilibrium was used to detect the representation, and differences of genotype frequencies and gene frequency were calculated in two groups of Kazak and Han groups. Results There were significant differences in BMI, SBP, DBP, apolipoprotein ratios and homocysteine between EHT group and NT group in Kazak and Han groups (P<0.05). There were no significant differences in genotype frequencies and gene frequencies of rs705193 between EHT and NT groups (P>0.05). The differences of Kazak rs1630310 genotype and gene frequency were statistically significant (P<0.01). The frequency of Kazak rs697372 locus genotype was not significantly different (P>0.05), but the difference of gene frequen?cy was statistically significant (P<0.05). There were no significant differences in rs1630310 and rs697372 locus genotype and gene frequency in two groups of Han group. Conclusion Cx37 gene polymorphism is associated with the occurrence of EHT in Xinjiang Kazak population, which may be related with the rs1630310 and rs697372 polymorphism.

Objective To study the clinical correlated factors of renal damage in henoch-schonlein purpura (HSP).Methods One hundred cases with HSP were retrospectively studied. Accoding to the urinary route examination, the patients were devided into 2 groups, HSP with (49 cases) and without renal damaged (51 cases). In addition, the group of HSP with renal damaged was further diveded into 2 groups, HSP with urinary abnormality passingly (27 cases) and persistently (22 cases). Clinical indicators were statistical analysed.Results To be compared with HSP without renal damaged, age,apread of the purpura, abdominal pain,hemorrhage of digestive tract were higher in HSP with renal damaged (P