Objective To investigate ~1H-MRS findings of brain tumor and the clinical application of ~1H-MRS.Methods 80patients with brain tumors clinically or pathologically-proved underwent ~1H-MRS.Normal opposite hemispheres in 30 cases were used as control group.Single voxel spectroscopy(SVS) or 2D-MRS imaging was performed with excited echo sequence.The mean ratio of metabolisms with difference was compared.Results Compared with control group,NAA of tumor decreased in certain degree(P

Objective To study the effects of mechanical strain on the proliferation of the human pulmonary epithelial cell and the redistribution of its membrane receptors, integrins ? 5 and ? 1. Methods A cyclic strain unit in vitro was designed. The cellular proliferative index was measured by flow cytometry and the redistribution of ? 5 and ? 1 integrins was analyzed in human pulmonary epithelial cell line H727 by laser confocal microscopy. Results The cellular proliferative index reduced significantly after cells were subjected to 15% elongation at frequencies of 20 cycles/min or 40 cycles/min for 24 h. In human pulmonary epithelial H727 cells, ? 5 and ? 1 integrins transferred from the apical layer to the basal layer and formed an adhesion plaque after 24 h exposure to 15% elongation at frequency of 40 cycles/min. Conclusion The results suggest that ? 5 and ? 1 integrins in pulmonary epithelial cells may play an important role in the transduction of mechanical stress.

As a means to substitute the function of kidney, hemodialysis therapy has been applied to clinical therapy. The bio-compatibility of dialyser, which is the key of part of artificial kidney, is a determining factor for the therapy. This paper describes dialyser and the methods of improving bio-compatibility of dialyser.

BACKGROUND:Osteogenesis is closely integrated with angiogenesis in bone formation and repair process, and hypoxia-inducible factor 1 alpha (HIF-1α) is considered to be the most important core transcription factor promoting angiogenesis gene regulation, which may promote the formation of blood vessels at hypoxia portion, and thus contribute to bone formation.
OBJECTIVE:To construct the Lenti-HIF-1α-IRES-EGFP (wild type) and Lenti-HIF-1α-IRES-EGFP (point mutant type) lentiviral eukaryotic expression vectors and to detect their impact on the osteogenic gene expression of rabbit bone marrow mesenchymal stem cells.
METHODS:The Lenti-HIF-1α-IRES-EGFP (wild type) and Lenti-HIF-1α-IRES-EGFP (point mutant type) lentiviral eukaryotic expression vectors were constructed according to the wild type human HIF-1αgene sequence and the determined restriction sites of human HIF-1αpoint mutant sequence. Rabbit bone marrow mesenchymal stem cells were transfected with the prepared Lenti-HIF-1α-IRES-EGFP (wild type) and Lenti-HIF-1α-IRES-EGFP (point mutant type) virus solution.
RESULTS AND CONCLUSION:Immunofluorescence microscopy observations indicated that the cells of Lenti-HIF-1α-IRES-EGFP (wild type) group and Lenti-HIF-1α-IRES-EGFP (point mutant type) group showed no obvious fluorescence on transfected 7 days, and two groups of cells showed a more obvious green fluorescent after transfection 14 days. Quantitative PCR analysis results showed that there were obvious HIF-1αand bonemorphogenetic protein 2 gene expressions on days 7 after transfection and the two genes stil showed highly expression levels after transfection 14 days. The two lentiviral eukaryotic expression vectors of Lenti-HIF-1α-IRES-EGFP (wild type) and Lenti-HIF-1α-IRES-EGFP (point mutant type) could be constructed according to the wild type human HIF-1αgene sequence and the determined restriction sites of human HIF-1αpoint mutant sequence;HIF-1αgene can promote the osteogenic gene expression of lentivirus-transfected rabbit bone marrow mesenchymal stem cells.

OBJECTIVETo investigate the effect of novel porous calcium phosphate cement (CPC) scaffoldings on attachment, proliferation and differentiation of bone marrow mesenchymal stem cells (BMSCs).

METHODSBMSCs of Beagle dogs were implanted and cultured with CPC scaffoldings in vitro, tricalcium phosphate (TCP) and poly (lactide-coglycolide) (PLGA) scaffoldings as controls. The attachment, proliferation and differentiation of BMSCs were detected through morphological characters, growth curve and the semi-quantitative detection of alkaline phosphatase (ALP) and osteocalcin (OC) activity.

RESULTSCell morphology and growth curve illustrated that BMSCs attached to and grown better on the surface of novel porous CPC scaffoldings than that of PLGA group (P < 0.05). Semi-quantitative analysis of ALP showed that ALP expression level in BMSCs on the CPC and TCP group were significantly higher than that of the PLGA group (P < 0.05), the CPC group was slightly higher than the TCP group, but no significant difference was found between the two groups (P > 0.05). The staining and semi-quantitative analysis results of OC demonstrated that calcium deposition of the PLGA group was significantly less than the CPC and TCP group on both observation point (P < 0.05), but no significant difference between the CPC and TCP group (P > 0.05).

CONCLUSIONThe novel porous CPC material used in this study has good biocompatibility similar to TCP but much better than PLGA which is favorable of BMSCs adhesion, proliferation and osteogenic differentiation. The novel porous CPC material is a suitable scaffolding for BMSCs to fabricate tissue-engineered bone in vitro.

Animals ; Bone Marrow Cells ; Bone and Bones ; Calcium Phosphates ; Cell Differentiation ; Cell Proliferation ; Cells, Cultured ; Dental Cementum ; Dogs ; Osteocalcin ; Osteogenesis ; Tissue Engineering

Objective To study effect of a novel schiff base ruthenium coordination compound on cell proliferation and apoptosis of gastric cancer SGC-7901 cell.Method Gastric cancer SGC-7901 cell were divided into four groups according to different treatment of novel schiff base ruthenium coordination compound (concentration of 10, 30, 50μmol/L) and blank group with DMSO.Cell proliferation was detected by MTT assay, cell apoptosis and cell cycle were analysed by flow cytometry.ResuIts MTT results showed the inhibitory effect of novel schiff base ruthenium coordination compound on SGC-7901 cell enhanced with the increase of its concentration, and inhibitory rates were higher than that of blank group at 24, 48, 72 h.Flow cytometry results showed the apoptosis rate of novel ruthenium coordination compound groups of 10, 30, 50μmol/L were (17.64 ±1.21)%, (26.47 ± 0.61)%, (55.63 ±1.49)%, respectively, all higher than that of blank group (P<0.05).The cell proportion of G1 phase increased with the increasing of the novel schiff base ruthenium coordination.ConcIusion A novel schiff base ruthenium coordination compound could inhibit the growth of gastric cancer SGC-7901 cells, promote apoptosis and arrest gastric cancer SGC-7901 cells at G1.

Objective:To investigate the effects of icaritin(ICT)on the proliferation and osteogenic differentiation of rat bone mar-row stromal cells(rBMSCs).Methods:rBMSCs were cultured from the bone marrow of SD rats and identified by multilineage differ-entiation assays.3,6 and 9 days after the treatment of rBMSCs of passage 4 by ICT at 1 0 -9 ,1 0 -8 ,1 0 -7 ,1 0 -6 and 1 0 -5 mol/L re-spectively,the proliferation and differentiation of the cells were examined by cck-8 and alkaline phosphatase (ALP)activity assay kit respectively.The calcium nodule formation was observed by alizarin red(AR)staining 21 days after 1 0 -9 mol/L ICT treatment. Results:Primary rBMSCs showed the typical spindle-like shape with attachment growth.rBMSCs could be induced to osteogenic and adipogenic differentiation.The proliferation of rBMSCs was inhibited but ALP activity was enhanced by ICT.1 0 -9 mol/L ICT in-cresed calcium nodule formation.Conclusion:ICT can dose-dependently inhibit the proliferation,but promote the osteogenic differ-entiation of rBMSCs.

Objective: To explore aspirin resistance (AR) phenomenon in patients with coronary artery disease (CAD) for secondary prevention and to study the relationships between AR and COX1, COX2, TBXA2R gene polymorphisms. Methods: A total of 2881 CAD patients taken aspirin (100 mg/day) in 7 consecutive days were enrolled. Among them, 2 groups were established as AR group, n=166 and Control group, n=200 aspirin sensitive patients. Platelet aggregation function was induced by arachidonic acid (AA), COX1, COX2 and TBXA2R gene polymorphisms were examined by polymerase chain reaction-restricted fragment length polymorphisms (PCR-RFLP) method. Results: The occurrence rate of AR was 5.76% (166/2881). There were 8 tagSNPs locus in 3 genes as in COX1:(rs3842788), (rs4273915), (rs7866582); in: COX2 (rs3218625); in TBXA2R: (rs2238630), (rs2238631), (rs2238633), (rs3786989). The frequencies of wild type, heterozygous genotype and homozygous genotype were similar between 2 groups. Conclusion: The incidence rate of AR is not high in CHD patients with regular aspirin medication; single nucleotide gene polymorphisms of COX1, COX2 and TBXA2R have no obvious correlation to AR.

Objective To investigate the correlation between gastric polyps and helicobacter pylori (Hp) infection .Methods 150 patients with gastric polyps(experimental group) and 150 patients with chronic gastritis(control group) from October 2011 to No-vember 2012 in Shapingba people′s hospital of Chongqing were enrolled in this study .The polyps biopsy in patients with gastric polyps and the mucosa in gastric antrum big and small bends ,and the anterior and posterior walls(about 2-5 cm from the pylorus) from both groups were detected for the pathological type ,inflammation degree and stained(modified Giemsa staining) for detection of the existence of Hp .Results In 150 patients with gastric polyps ,58% (87/150) of the cases were infected by Hp mainly in medi-um and low degree ,in which 39 .3% (59/150) of the infection located at polyps and 42% (63/150) of the infection occurred out of polyps .Pathological analysis for this group further demonstrated that the types of hyperplastic polyps ,fundic gland polyps ,inflam-matory polyp and adenomatous polyps accounted for 68 .0% (102 cases) ,20 .7% (31 cases) ,9 .3% (14 cases) and 2 .0% (3 cases) of total 150 gastric polyps cases ,of which 63 .7% (65/102) ,38 .7% (12/31) ,57 .1% (8/14) and 66 .7% (2/3) cases were infected by Hp ,respectively .Pathological analysis also indicated that ,among total 150 gastric polyps cases ,single polyps and multiple polyps types accounted for 62 .0% (93 cases) and 38 .0% (57 cases) .The polyps commonly existed at gastric fundus in which the incidence rate of the hyperplastic polyps type and the fundic gland polyps type were 94 .1% (96/102) and 87 .1% (27/31) ,respectively .The infection rate in hyperplastic polyps was markedly higher than that in fundic gland polyps (P<0 .05) ,and the infection of hyperplas-tic polyps was mainly medium and high degrees .In addition ,the inflammatory response in the hyperplastic polyps was higher ,ac-companied by the intestinal metaplasia and atrophy of gastric mucosa ,as compared with non-hyperplastic polyps .In the total 150 control cases ,52 .0% (78/150) patients were infected by Hp with mainly medium and high degree .Results indicated that there is no relationship between polyps occurring and Hp infection .Conclusion Compared to the chronic gastritis ,there is no positive associa-tion between gastric polyps and Hp infection .There is no remarkable difference for Hp infection rate and degree between the polyps and the non-polyps sites in the stomach .The infection rate and infection degree of hyperplastic polyps is significantly higher than that of fundic polyps .However ,the underlying mechanisms for the development of hyperplastic polyps have to be elucidated in the future .

Objective To study the relationship between serum carbohydrate antigen 19-9 (CA19-9) and blood glucose level in patients with type 2 diabetes (T2DM).Methods Totally 784 T2DM patients and 197 healthy controls were enrolled in this study.Age,duration,body mass index (BMI),systolic blood pressure (SBP),diastolic blood pressure (DBP),levels of fasting blood glucose (FBG),postprandial blood glucose (PBG),hemoglobin A1c (HbA1c),total cholesterol (TC),triglyceride (TG),low-density lipoprotein cholesterol (LDL-C),high density lipoprotein cholesterol (HDL-C),blood uric acid,C peptide and CA 19-9 were recorded.Patients were divided into different groups according to the levels of HbA1 c and CA 19-9.The relationship between CA19-9 and influencing factors was analyzed.Results CA19-9 level was increased in T2DM patients compared with healthy controls [(22.08±14.94) U/mlvs.(10.24±6.31) U/ml,t=12.10,P＜0.001].The levels of SBP,DBP,FBG,PBG,C peptide,TC,TG,LDL and UA were higher and HDL C level was lower in T2DM patients than in healthy controls (all P＜0.05).The levels of FBG,PBG and CA19-9 were increased along with the increase of HbA1c level in T2MD patients with HbA1c level under 6.5％,T2MD patients with HbA1c level from 6.5％ to 7.5％,T2MD patients with HbA1c level over 7.5％ [FBG:(6.36±3.70) mmol/L,(9.01±4.01) mmol/L,(11.96±4.73) mmol/L;PBG:(9.69±3.21) mmol/L,(12.18±5.54) mmol/L,(15.27±5.08) mmol/L; CA19 9 (14.33±11.72) U/ml,(18.76±14.39) U/ml,(25.96±17.52) U/ml,respectively,all P＜0.05].The levels of FBG,HbA1c and pancreatic cancer incidence were higher in patients with elevated CA19-9 than with normal CA19-9 [(11.71±5.48)mmol/L vs.(9.78±4.38)mmol/L,(7.49±4.12)％ vs.(6.33±3.70)％,0％ vs.7.8％,t=-3.51,2.55,x2=83.58,allP＜0.05].Pearson correlation analysis showed that CA19-9 level was positively correlated with the levels of HbA 1 c and FBG in T2DM patients (r=0.281,0.134,both P＜0.05).Multiple Logistic regression analysis showed that the levels of FBG and HbA1c were correlated with the increase of CA19 9 in T2DM patients(OR=0.801,0.947,P=0.019,0.026).Conclusions Serum CA19-9 level is significantly increased in T2DM patients compared with the healthy people.Serum CA19-9 level is correlated with blood glucose control.