AIM: To study the effects of 9 (4 Ethoxycarboxylyphenoxy) 6,7 dimethoxy 1,2,3,4 tetrahydro acridine (EDT) on learning and memory abilities. METHODS: The step down test and Y maze test were adopted in this study. RESULTS: EDT ( 2.5 , 5, 10 mg?kg -1 , ig? 5 d ) dose dependently improved the impairment of memory acquisition, memory consolidation and memory retrieval induced by scopolamine, NaNO 2 and alcohol in mice. CONCLUSION: EDT can improve learning and mermory ability in mice.

Aim To study the effects of 9-(4-ethoxycarbonylphenoxy)-6,7-dimethoxy-1,2,3,4-tetrahydro acridine (EDT) on free radical induced injury in primary cultured rat cortical neuron and cerebral ischemia in mice. Methods In primary rat cortical neuron, free radical injury model was established by 10 μmol*L-1 H2O2. The content of malondiadehyde (MDA) and activity of superoxide dismutase (SOD) in cells were investigated. Chronic cerebral ischemia model was produced by occlusion of one carotid artery and pneumogastric nerve in mice. The step down test was adopted to investigate the effect of EDT on the memory impairment. The cerebra morphology and MDA, NO content and SOD activity in mice cerebra were detected. Results In primary rat cortical culture, 0.01-3 μmol*L-1 EDT concentration-dependently inhibited the formation of MDA and reduction of SOD activity induced by 10 μmol*L-1 H2O2. In chronic cerebral ischemia, EDT 2.5, 5 and 10 mg*kg-1 ig for 5 d greatly improved the memory impairment, reduced NO efflux and MDA content, while increased SOD activity in mice cerebra. Conclusion EDT was found to protect neurons from H2O2-induced neurotoxicity and inhibit chronic cerebral ischemia mediated injury and memory impairment in mice.

To elucidate the latest progress of proteomics research of central nervous system diseases and drugs. Proteomics , an important discipline in postgenomic era, is the integrated study of protein properties on a large scale. Currently, the best established application of proteomics are in the clinical and biomedical fields. Proteomics will facilitate the elucidation of network mechanism of the development, progress and prognosis of central nervous system diseases. Proteomics offer a unique opportunity to identify disease specific proteins, accelerate the development of target driven drugs, build up molecular pharmacological models, screen and analysis of the efficacy, toxicity and side effects of potential drugs on a large scale. It is predictable that proteomics will play a tremendous role for the diagnosis, detection and pharmaceutical development of central nervous system diseases.

Objective To investigate the expressions and relationship between lysine-specific demethylase 1 (LSD1) and E-cadherin protein in gastric cancer tissues and adjacent normal tissues,and the correlation with the clinicopathological features and prognosis of patients with gastric cancer.Methods The case-control study was adopted.The gastric cancer tissues and adjacent normal tissues were collected by surgical resection from 80 patients with gastric cancer who were admitted to the Xiangya Hospital of Central South University from June 2008 to June 2009.Expressions of LSD1 and E-cadherin protein were detected by immunohistochemistry (IHC).The follow-up of telephone interview was performed to detect survival of patients till June 2015.Relationships between the expressions of LSD1 and E-cadherin protein and clinicopathological features or prognosis of patients were analyzed.Comparison of count data and correlation were analyzed by the chi-square test and Spearman rank correlation analysis.Survival curve was drawn using the Kaplan-Meier method,and survival analysis was done using the Log-rank test.Results Expressions of LSD1 in cancer tissues and adjacent normal tissues were located at the cell nucleus.The positive expression rate of LSD1 was 67.5％ (54/80) and 43.8％ (35/80) in cancer tissues and adjacent normal tissues,respectively,with a significant difference (x2=9.141,P ＜ 0.05).Expressions of E-cadherin protein in cancer tissues and adjacent normal tissues were located at the cell membrane and cytoplasm.The positive expression rate of E-cadherin was 63.8％ (51/80) and 81.3％ (65/80) in cancer tissues and adjacent normal tissues,respectively,with a significant difference (x2 =6.140,P ＜ 0.05).The positive expression rate of LSD1 was 83.3％ (25/30),76.0％ (19/25) and 40.0％ (10/25) in the low-,moderate-and high-differentiated tumors,37.5％ (6/16),72.7％ (16/22),71.9％ (23/32) and 90.0％ (9/10) in the Ⅰ,Ⅱ,Ⅲ and Ⅳ stages of TNM stage,36.4％ (4/11) and 72.5 ％ (50/69) in patients without and with lymph node metastasis,respectively,showing significant differences (x2=12.870,9.425,4.111,P ＜ 0.05).The positive expression rate of E-cadherin protein was 53.3％ (16/30),56.0％ (14/25) and 84.0％ (21/25) in the low-,moderate-and high-differentiated tumors,75.0％ (12/16),63.6％ (14/22),71.9％ (23/32) and 20.0％ (2/10) in the Ⅰ,Ⅱ,Ⅲ and Ⅳ stages of TNM stage,100.0％ (11/11) and 58.0％ (40/69) in patients without and with lymph node metastasis,70.0％ (49/70) and 20.0％ (2/10) in patients without and with distant metastasis,respectively,showing significant differences (/x2 =6.494,10.073,5.547,7.426,P ＜ 0.05).There was a negative correlation in expressions between LSD1 and E-cadherin protein (r =-0.355,P ＜ 0.05).The survival time and 5-year overall survival rate of patients with positive and negative expressions of LSD1 were (36.9 ± 2.5) months and 31.1％,(47.4 ± 3.4) months and 56.0％,respectively,showing a significant difference (x2=4.550,P ＜0.05).The survival time and 5-year overall survival rate of the patients with positive and negative expressions of E-cadherin protein were (44.0 ± 2.5) months and 46.7％,(32.6 ± 3.5) months and 24.9％,respectively,showing a significant difference (x2 =7.306,P ＜ 0.05).Conclusions Positive expression of LSD1 in gastric cancer tissues is higher than that in adjacent normal tissues.There are increased expression of LSD1 and reduced expression of E-cadherin protein in low-differentiated gastric cancer tissues and high TNM stage,showing a negative correlation between them.Positive expression of LSD1 and negative expression of E-cadherin protein may indicate a poor prognosis.

AIM To study the effects of propofol on membrane fluidity and intracellular free Ca 2+ concentration ([Ca 2+ ] i ) in PC12 cells and discuss its relevant mechanism. METHODS PC12 cell lines were divided into seven groups: control, solvent and propofols(1,3,10,30,100 mg?L -1 ). Fluorescence depolarization method was used to measure dynamically microviscosity in PC12 cells and [Ca 2+ ] i was detected using calcium fluorescentprobe Fluo 3/AM and a laser scanning confocal microscope. RESULTS ①Acute administration of various doses of propofol induced a significant decrease of microviscosity in PC12 cells dose dependenty. ② Solvent, propofol at dose of 10 mg?L -1 had no effect on [Ca 2+ ] i in PC12 cells, however, after 30 and 100 mg?L -1 administration, [Ca 2+ ] i increased markedly at 20～30 seconds (increase percentage were 119% and 140% respectively) and then recovered to their pre administration levels within 50 seconds. CONCLUSION The propofol can significantly increase membrane fluidity in PC12 cells in a dose dependent manner and elevate [Ca 2+ ] i in PC12 cells at doses of 30 and 100 mg?L -1 . These changes are consistent with each other and related closely with anesthetic effect of propofol.

Objective To investigate the diagnosis and treatment of splenic space occupying lesions associated with comorbidity.Methods The clinical data of 5 patients from Jiangyin People' s Hospital and 9 patients from Wuxi People's Hospital from January 2002 to June 2012 were retrospectively analyzed.All the patients suffered from splenic space occupying lesions associated with comorbidity.Splenectomy or multi-visceral resection were selected according to the results of preoperative B sonography and computed tomography examination.Chemotherapy regimes were selected based on postoperative pathological examination.All the patients were followed up till June 2013.Results The symptoms of patients with splenic space occupying lesions were non-specific.The first symptoms of 4 patients were discomfort or distending pain of left upper abdomen,and the other 10patients had no symptoms.The coincidence rate of preoperative diagnosis was 10/14,and the coincidence rate of preoperative diagnosis for patients with malignant tumors was 2/5.Fourteen patients received preoperative B ultra-sonography,and 9 were definitively diagnosed.Nine patients received computed tomography,and 7 were definitively diagnosed.Of the 14 patients,right ovarian cancer,bilateral ovarian cancer and sigmoid colon cancer were correlated with solitary splenic metastasis,and the main lesions of the other 11 patients were not correlated with splenic space occupying lesions.The main lesions of patients with left colon carcinoma,type 2 diabetes and vascular tumor of the spleen,patients with renal carcinoma and splenic sclerosing hemangioma,and patients with hypertension,cholecystolithiasis and splenic lymphangioma were diagnosed simultaneously with the splenic space occupying lesions,and the main lesions of theother 11 patients were diagnosed separately with the splenic space occupying lesions.Ten patients underwent simple splenectomy and 4 patients received multi-visceral resection.Chemotherapy regimens were selected according to the type of main lesions for 5 patients who were diagnosed by pathological examinations.All the patients were recovered smoothly with no occurrence of severe infections.Two patients with splenic sarcoma had tumor metastasis at postoperative 6 months and 1 year,respectively.One patient with right ovarian cancer and solitary splenic metastasis had transverse colonic metastasis at postoperative 3 years.One patient with bilateral ovarian cancer and solitary splenic metastasis had peritoneal metastasis at postoperative 2 years.One patient with sigmoid colon cancer and solitary splenic metastasis died of peritoneal tumor recurrence at postoperative 4 years.One patient with left colon carcinoma,type 2diabetes and vascular tumor of the spleen survived for 6 years and was still sound and well.The other 9 patients with benign disease survived within the period of follow-up.Conclusions The definitive diagnosis for patients with splenic space occupying disease associated with comorbidity depends on the preoperative imaging examination and postoperative pathological examination.Surgical treatment is safe when operative contraindications are excluded.The prognosis of patients is determined by the progress of main lesions and the character of splenic space occupying lesions.

Objective To explore the roles of vascular endothelial growth factor (VEGF) and P38MAPK in the pathogenesis of Alzheimer's disease(AD) rats,and the effects of butyIphthalide on the influence of VEGF and P38MAPK in hippocampus of AD rats.Methods SD rats were randomly divided into blank group,AD model group,butylphthalide low-dose group and high dose group (n =8 rats per group).Aggregated Aβ1-42 was injected into the bilateral hippocampus of rats by stereotaxic coordinates method to induce AD.Morris water maze test was used to determine the abilities of learning and memory.Western blotting combined with Gel Doc imagine systems were used to investigate the expression of VEGF and P-P38MAPK in hippocampus of AD rats.Results The result of Morris water maze experiment showed that one week after modeling,escape latency was different(F =66.658,P ＜ 0.05),and either dose the frequency of crossing platform (F =6.884,P ＜0.05).Compared with the blank group,the other three groups'latent period of escape was extended significantly(P ＜ 0.05),and frequency of crossing platform was significantly less (P ＜ 0.05).After drug intervention for 4 weeks,the expression of VEGF was difference(F =171.064,P ＜0.05),it was decreased obviously in the model group than blank group(P ＜=0.05),but it was increased in the drug intervention groups than model group (P ＜ 0.05),and increased more significantly in the high dose group than low dose group (P ＜ 0.05).The expression of P38MAPK had no obvious change among four groups (P ＞ 0.05),however,the expression of P-P38MAPK showed difference(F =104.395,P ＜ 0.05),it was increased in drug intervention and model group than blank group (P ＜ 0.05),it was increased in drug intervention and model group than blank group (P ＜ 0.05),reduced significantly in drug intervention groups than model group (P ＜ 0.05),and decreased more significantly in high dose groups than low dose group (P ＜ 0.05).Conclusions Butylphthalide could obviously enhance the expression of VEGF,reduce the expression of P-P38MAPK in hippocampus of AD rats.

AIM: To study the effects of propofol on plasma membrane fluidity in PC12 cells and liposome,and its relevant mechanism. METHODS: Fluorescence depolarization method was used to measure values of fluorescence anisotropy, fluorescence polarization as well as microviscosity in PC12 cells and microviscosity in liposome continuously for 30 min. RESULTS: Propofol induced a significant decrease of fluorescence anisotropy, fluorescence polarization as well as microviscosity in PC12 cells, particularly in the first 5 min. After 5 min, the values of anisotropy were remained lower levels. Although propofol at concentration of 1 mg?L -1 had no effects on microviscosity in liposome, porpofol at concentration of 10 mg?L -1 and 100 mg?L -1 significantly decreased microviscosity in liposome. CONCLUTION: Propofol can significantly increase membrane fluidity in PC12 cells and liposome in a concertration dependent manner, and the anesthetic effect of propofol may be resulted from changes of membrane fluidity and structure of neurocyte.

Objective To establish the cell line from specimens of resectable human gastrointestinal stromal tumors (GIST) and to verify the characteristics of cell biology in vitro. Methods The tissues from biopsies of human GIST were cultured in RPMI 1640 media supplemented with 10% fetal bovine serum. After growing to 90% confluence,the cells were detached for subculture and their characteristics,including morphology,growth kinetics,karyotype analysis,immunohistochemical analysis and tumorigenicity in nude mice were determined. Results GIST named GIST-H1 was successfully established. The cell line was passaged for more than 60 times 1 year. The characteristics demonstrated: The population doubling time calculated in the log phase of growth was 47.5 h. The cloning efficiency in the soft agar averaged 24.8%.Electronmicroscopically,there were rich ribosomes and mitochondrion in the cytoplasm. Immunohistochemical analysis showed CD117(+),SMA(+),dog-1(+),CD34(-),and S-100(-).Karyotype analysis illustrated aneuploidy with the modal chromosomal number 60-98.The GIST cells transplanted in nude mice had high tumorigenicity. Conclusion The immortalized GIST cells are devoloped in vitro and have specific characteristics of GIST.

Objective To research the relationship between the myocardiac ischemic activity and degree of depression in elderly patients.MethodsThe Center For Epidemiological Studies-Depressive Scale(CES-D) was administered to evaluate depressive degree for 121 patients who were defined as coronary artery diseased by coronary angiography (CAG); group A (n=64) for no depressive symptoms,group B (n=34) for minor depression, group C (n=23) for major depression were studied to observing the myocardial ischemia using Holter's recording and exercise testing.ResultsCAG showed that single vessel disease was more frequently in group A;single,double and three-vessel disease showed approximative proportion in group B,three-vessel disease was more frequently in group C.The times of ST-depress were (4.2±1.3),lasting time of ST-depress was (35.8±9.2) min,and index of ST-depress was (3.28±0.9) min/h,which were higher than those of group A [(1.8±0.3),(16.6±4.2) min,(1.76±0.4) min/h] and group C [(2.1±0.7),(17.8±5.8) min,(1.69±0.5)min/ h](P<0.05);There was significantly frequent myocardial ischemia in group B than in group A during exercise testing (χ2=3.274,P<0.05). patients in group C tended to have approximative incidence of ischemia compared with group A during daily living,but more incidence of ischemia than group B during exercise testing(χ2=5.473,P<0.05).ConclusionThe depressive degree was associated with severity of coronary artery disease,mild to moderate symptoms of depression are associated with an increased likelihood of myocardial ischemia during daily living and exercise,but patients with severity depression absence symptoms of myocardial ischemia during daily living,and exhibit markedly myocardial ischemia during exercise.