BACKGROUND: The method and effect of construction of tissue-engineering heart valve scaffold with cell detergents are different, and the method of detergent combining with the trypsase and nucleese is more suitable than others. OBJECTIVE: To investigate the effect of different detergents (sodium deexycholate, sodium dodecylsulfate, and triton) combined with trypsase on decellularized porcine heart valve and the influence on the accellular scaffold. METHODS: Porcine aortic valve leaflets were sterilized by antibiotics for 12 hours, maintained in the solution of the trysin and the EDTA for 12 hours, and treated with sodium deexycholate, sodium dodecylsulfate, and triton. Finally, the sample was dip in nucleese solution for 12 hours to remove endothelial cells and interstitial cells. HE staining was used to detect whether the endothelial cells were removed completely, Masson staining was used to evaluate damage level of collagen fiber and elastic fiber, and electronic scanning was used to observe the microstructure. RESULTS AND CONCLUSION: All the three detergents completely removed the endothelial ceils; however, the effect of sodium decxycholate on collagen fiber and elastic fiber was light, and then sodium dodecylsulfate and triton. This suggested that the method of DOA combining with the enzyme digestion was a suitable technique to construct tissue-engineering heart valve scaffold.

Objective:To investigate the activated state of TH1/TH2 cytokines and T lymphocytes and to explore the pathogenesis of ankylosing sondylitis.Methods:Cytokine levels of Th1(IFN-?、TNF-?、IL-2)and Th2(IL-10、IL-5、IL-4) in plasma, percentages of CD3 +、CD4 +、CD8 + T cells、B cells(CD19 +) NK cells(CD16 +56 +)and CD3 +HLA-DR +、CD4 +HLA-DR +、CD8 +HLA-DR + T cells in peripheral blood lymphocytes were detected by Flow Cytometry.Results:In patients with AS ,plasma levels of TNF-?、IL-2 were significantly lower than that of healthy controls. IL-10 were significantly higher than that of healthy controls. In AS patients, percentages of CD3 +and CD8 + T cell from peripheral blood lymphocytes were significantly lower than that of healthy controls. Percentages of CD8 +HLA-DR + T cell were significantly lower than that of healthy controls. CD4 +HLA-DR +T cell was significantly highter than that of healthy controls.Conclusion:In patients with AS , lower levels of TNF-?、 IL-2 and higher level IL-10 at plasma indicate an inclination between TH1 and TH2, such as an impaired TH1 cytokine profile and an activated TH2 cytokine profile, especially in TNF-?.

Animals ; Female ; Hippocampus ; physiology ; Learning ; Long-Term Potentiation ; Male ; Memory ; Mice ; Mice, Inbred Strains ; Pregnancy ; Prenatal Exposure Delayed Effects ; psychology ; Tobacco Smoke Pollution

Endophytic fungi which reside in the tissue of mangrove plants seem to play an important role in the discovery of new biologically active substances. During the course of screening for the antimicrobial metabolites from the endophytic fugus Penicillium sp. FJ-1 of mangrove plant Avicennia marina, a new aurone glycoside (1) was isolated by repeated column chromatography on silica gel and recrystallization methods. The structure of 1 was elucidated as (Z)-7,4'-dimethoxy-6-hydroxy-aurone-4-O-β-glucopyranoside, on the basis of spectroscopic analysis. Compound 1 exhibited antifungal activity against Candida sp., with the potency comparable to amphotericin B and much better than fluconazole. Compound 1 can also inhibit extracellular phospholipase secretion in a concentration-dependent manner.
Antifungal Agents ; chemistry ; isolation & purification ; metabolism ; pharmacology ; Benzofurans ; chemistry ; isolation & purification ; metabolism ; pharmacology ; Candida ; drug effects ; Glycosides ; chemistry ; isolation & purification ; metabolism ; pharmacology ; Molecular Structure ; Penicillium ; chemistry ; genetics ; isolation & purification ; metabolism ; Seawater ; microbiology

Objective To explore the effect of sodium fluoride(NaF) on the tumor markers of human embryonic bronchial epithelium (HEBE) cells.Methods HEBE cells were collected from the human abortive fetues.The cells were exposed to NaF of several concentrations for 36 h.After rinsed,the cells were incubated for 36 h again.The NaF toxicity to HEBE cells was detected using MTT method.The supernatant was collected and the lung tumor markers were detected using ELISA method.Results NaF was toxic to the HEBE cells,and the toxicity was increased with the NaF doses.There were few survival HEBE cells at 6 mmol/L NaF.The tumor markers in both of the control and experiment groups were very low,and no significant difference had been seen between them.Conclusion NaF may damage HEBE cells,but may not influence the tumor markers of HEBE cells.

Objective To observe the protective and repairing effects of bone mesenchymal stem cells(BMSCs) transplantation on cerebral infarction in rats and to study the different effect of transplantation at different time points. Methods Middle cerebral artery occlusion(MCAO) models were set up,and the rats were divided into a control group,a group with PBS transplantation and five groups with BMSCs transplantation 3,6,12,24 and 72 h after MCAO,respectively.The volume of infarction area and the neurological severity score(NSS) in all the groups were compared. Results Twenty-eight days after MCAO,the TTC staining indicated that the volume of infarction area in the groups with BMSCs transplantation decreased remarkably compared with the control group and the group with PBS transplantation(P

Objective To investigate the sensitivity of the real-time fluorescence PCR technique and the bacterial culture for detecting the colonization of group B Streptococcus(GBS)in late pregnant women.Methods 2 specimens were collected from preg-nant women genital tract-rectal secretions swabs,one specimen for conducting the bacterial culture and another for conducting the real-time PCR technique to detect genital GBS.The accuracy and rapidness were compared between the two methods.308 cases of pregnant women were divided into the GBS positive group and the GBS negative group according to the detection results of the real time real-time fluorescence PCR technique.The relation between the occurrence of premature rupture of membranes with GBS was investigated by the comparative analysis.Results Among 308 pregnant women with GBS detection,18 cases were positive by the ordinary bacterial culture with the positive rate of 5.8%(18/308),while 28 cases were positive by the real-time fluorescent PCR with the positive rate of 9.4%(29/308).In the GBS positive group detected by PCR,the premature rupture of membranes occurred in 9 cases with the positive rate of 31%,while in the GBS negative group detected by PCR,which occurred in 33 cases with the pos-itive rate of 11.83%.Conclusion This survey shows that the positive detection rate of the real-time fluorescent PCR technique is significantly higher than that of the bacterial culture method,the application of this detection technique for detecting GBS provides the basis for rapidly diagnosing GBS and conducting the prophylactic use of antibacterial drugs more accurately and more effectively.

Objective To analyze the relationship between plasma aldosterone level and gestational diabetes melli?tus. Methods All subjects were divided into three groups (n=20 in each group):gestational diabetes mellitus (GDM) group, pregnancy with normal glucose group,non-pregnant healthy women group. Pre-pregnant body mass index (BMI) was calcu?lated, and fasting blood glucose (FBG), blood lipid level, Fins, HOMA-IR index, RASS, PRA, ATIi and ALD were examined besides glucose intolerance test. Results The plasma ALD level was significantly higher in GDM group than that of NGT group and control group(pmol/L:1 130.15±135.45 vs 1 053.98±108.86 vs 544.31±127.97). The plasma ALD level was posi?tively correlated with FBG,1 h PBG ,2 hPBG,Fins , HOMA-IR and blood triglyceride (r=0.657, 0.757, 0.713, 0.429,P<0.05),but negatively correlated with HDL-C(r=-0.267,P=0.039). Stepwise regression analysis revealed that plasma aldo?sterone was the independent risk factor of GDM. Conclusion RASS is excessively activated in pregnancy, which contrib?utes to gestational diabetes mellitus.

Objective To explore the factors related to the prognosis and survival duration of primary liver cancer patients after hepatectomy.Methods The data of primary liver cancer patientswho were treated by surgical resection were analyzed retrospectively.Kaplain-Meier method was used to evaluate survival rates.Log-rank test and Cox regression analysis were used to screen out related clinical phathology factors.Results The median survival time was eighteen months.Univarivate analysis showed that liver function Child-Pugh classification,cirrhosis,tumor size,HBV infection,AFP,portal vein tumor thrombus significantly correlated with survival rates (P ＜ 0.05).Multivariate analysis showed that liver function Child-Pugh classification,tumor size,AFP and portal vein tumor thrombus were the independent prognostic factors of primary liver cancer (P ＜ 0.05).Conclusion Many factors are related to the prognosis of primary liver cancer after operation.Liver function Child-Pugh classification,tumor size,AFP and portal vein tumor thrombus affect prognostic independently.

Objective To study the ecological characteristics of toxigenic fungi in soil of the suburban villages of Zhangzhou, Fujian. Methods 48 soil samples were collected from 24 natural villages in Zhangzhou and cultured in bengal rose agar plate, then the fungal count and species identification were carried out. Results The numbers of fungi in unit area in 48 soil samples were in the normal rang. 3357 strains of 34 fungal genera were found in sampled soil samples. Fusarium and Penicillium were the dominant genera, as well as Trichoderma, Parcilomyces, Cladosporium which were commonly detectable. 4 strains of Aspergillus flavas were found, 2 of them were toxigenic. Aflatoxin B 1 production were 6?7 ng/g respectively and they didnt produce AFB 2? AFG 1? AFG 2. 2 strains of A. versicolor both produced sterigmatocystin. Conclusion Aspergillus flavus showed lower proportion in mycoflora and weaker capability for producing aflatoxins in soil of suburban villages of Zhangzhou. This data obtained could be used as the basis for agriculture areal programme.