Animals ; Astragalus membranaceus ; chemistry ; CD4-CD8 Ratio ; Carcinoma, Lewis Lung ; drug therapy ; pathology ; Cell Line, Tumor ; Drugs, Chinese Herbal ; administration & dosage ; therapeutic use ; Female ; Injections ; Mice ; Mice, Inbred C57BL ; Neoplasm Transplantation ; Plants, Medicinal ; chemistry

To investigate the influence of mixing ratios on the hardness,wear resistance and compressive strength of the cements clinically used,Zinc Oxide Eugenol cement,Glass ionomer cements,Zinc Phosphate Cement,and Dual-curing composite cement were mixed at different ratios separately,then made into test pieces.Vickers hardness,wear resistance and compressive strength of these test pieces were measured by related machines.The results showed that vickers hardness,wear resistance and compressive strength of Zinc Oxide Eugenol cement,Glass ionomer cements and Zinc Phosphate Cement reduced with the decrease of powder/liquid ratios.As to Dual-curing composite cement,Vickers hardness,wear resistance and compressive strength decreased with the difference between A/B ratio and 1∶1 increase.Conclusively,mixing ratios could influence the mechanical proprieties of the cements clinical used,so the use of cements should be under the instructions of the product.

The informatization of traditional Chinese medicine resources is the basis of modern medicine. With a spatial attribute traditional Chinese medicine resources could be carried out for in-depth spatial analysis, data mining and traditional Chinese medicine resources regional industrial layout. In this paper, we took the data of Glycyrrhiza uralensis in the third national Chinese medicine resources survey as the experimental data, described the principles and structure of traditional Chinese medicine resources spatial information database. We also described the establishment of analysis model with the help of this spatial database.
Data Mining ; Databases, Factual ; Medicine, Chinese Traditional ; Plants, Medicinal ; chemistry

Antineoplastic Agents ; pharmacology ; Apoptosis ; drug effects ; Cell Cycle ; drug effects ; Cell Proliferation ; drug effects ; Deoxyadenosines ; pharmacology ; HeLa Cells ; Humans

Objective To evaluate the effect of Ganoderma lucidum on drug resistance of the cisplantin-resistant ovarian cancer cell line(A2780CP).Methods The A2780CP cells were randomly divided into control group and test group.The cells in control group and test group were incubated in culture media alone and in culture media containing Ganoderma lucidum 0.5 mg/ml for 48 h respectively.The resistance index(RI) of A2780CP was determined by WST-1 assay.The expression of Akt,Bcl-2 and p53 protein was measured by Western blot.Results The RI was significantly deeressed,the expression of Akt and Bcl-2 protein was down-regulated,while p53 protein expression was up-regulated in test group as compared with control group(P<0.05).Conclusion Ganoderma lueidum can reduce the resistance of A2780 CP cells to cisplantin by down-regulating the expression of Akt and Bcl-2 and up-regulating p53 expression in A2780CP cells.

Objective To investigate the association between glutamate receptor-6 (GIuR6/GRIK2) gene polymorphism and domestic violence in Xinjiang Uygur population on alcoholics.Methods The methods of polymerase chain reaction (PCR) and DNA sequencing technique were conducted to detect rs6922753 and rs2227283 single nucleotide polymorphism of GLUR6 gene in a 104 domestic violence perpetrators on alcoholics and 80 non-domestic violence perpetrators on alcoholics.The association between the polymorphisms and violent behavior was analyzed with SPSS 17.0.Results The frequency of allele (x2 =4.935) and genotype (x2 =7.622) of rs6922753 polymorphisms in the domestic violence group were statistically different from those in the non-domestic violence group (P ＜ 0.05),there was no significant difference between two groups in allele frequencies and genotype in rs2227283 site (P ＞ 0.05).Conclusions GIuR6 gene polymorphism may be associated with domestic violence in Xinjiang Uygur population on alcoholics.

Objective To study the antitumor mechanism of DHA compound. Methods RT-PCR was used to investigate the effects of DHA compound on H-Ras and pl6 mRNA transcription in gastric adenocarcinoma. Results Compared with control, the content of H-Ras mRNA was decreased and the content of p16 mRNA was increased in gastric adenocarcinoma significantly after treated with DHA compound. Conclusion The transcription of H-Ras gene was decreased and the transcription of pl6 gene was increased in gastric adenocarcinoma after treated with DHA compound and thus the cancer cell growth was inhibited.

BACKGROUND: Multiple sclerosis(MS) is a chronic autoimmune disease induced by the interaction between genetic and environmental factors. Its pathogen and the mechanism of the relapse and remission m the course of the disease are still unknown. Most of the MS research centers are looking for the pathogenic polypeptide epitope in proteolipid protein(PLP), myelin sheath basic protein (MBP) and oligodendrocyte glycoprotein (MOG) OBJECTIVE: To compare the proliferation of T cell lines(TCL) in MS induced by myelin sheath and delipidated myelin sheath towards 11 components of myelin sheath to mainly search the possible pathogenic polypeptide epitope in PLP, and investigate the possible effects of abnormal dcgrease in myelin sheath.DESIGN: A case-controlled trial.SETTING: Department of neurology in a hospital of a university.PARTICIPANTS: Mononuclear cells(MNC) of 16 MS cases(clinical relapsing-remitting type, patients did not receive any immunosuppresant for at least 3 months when their peripheral blood samples were taken) and 12 HLA-DR15 healthy volunteers were furnished by Dr. Trotter JL of MS Research Center of Washington University from the cell database.INTERVENTIONS: MS-TCL and normal TCL were induced twice by stimulation with myelin sheath and delipidated myelin sheath in vitro by cell culture in vitro. TCL proliferation was tested by 11 antigens including PLP,MBP, M87-106, P30-49, P40-60, P89-106, P95-117, P117-137,P139-151, P178-191, and P185-206.MAIN OUTCOME MEASURES: Difference of scintillation counting in every minute of every well, and the stimulative index of each well were calculated, and the mean wells with positive proliferation of TCL towards each antigen were confirmed as well.RESULTS: The general specific proliferation towards myelin sheath antigens was bigger in MS group than control group 5.49 ±5.31 to 3.10 ± 3. 17, and delipidated myelin sheath-induced TCL was bigger than myelin sheath-induced one 5. 49 ± 5.31 to 3.41 ± 4. 83 . Delipidated myelin sheath significantly changed the immune responses of MS group,especially the changes of responses towards P30-49, P40-60, P89-106,P117-137, P139-161, and P185-206 were significant compared with that the control group only responded to two polypeptides, which indicated that the antigen epitope of MBP, PLP, M87-106, P95-117, P40-60, and P185-206 might have significance in the triggering of MS autoimmune responses.CONCLUSION: TCL induced by MS myelin sheath has different proliferation towards antigen components of myelin sheath from control group. Delipidated myelin sheath significantly increases TCL proliferation in MS group, which suggests that if MS patients developed abnormal degrease in myelin sheath, TCL would produce autoimmune response towards self-myelin sheath, MBP, PLP and its polypeptide segments all can trigger MS or aggravate the state of the illness. Our finding supports the hypothesis of MS autoimmune pathogenic mechanism.

To explore the role of mechanosensitive potassium channel TREK-1, Western blot analysis was used to investigate the expression changes of TREK-1 in left ventricle in acute mechanically stretched heart. Forty Wistar rats were randomly divided into 8 groups (n=5 in each group), subject to single Langendorff perfusion for 0, 30, 60, 120 min and acute mechanical stretch for 0, 30, 60, 120 min respectively. With Langendorff apparatus, an acute mechanically stretched heart model was established. There was no significant difference in the expression of TREK-1 among single Langendorff perfusion groups (P>0.05). As compared to non-stretched Langendorff-perfused heart, only the expression of TREK-1 in acute mechanically stretched heart (120 min) was greatly increased (P<0.05). This result suggested that some course of mechanical stretch could up-regulate the expression of TREK-1 in left ventricle. TREK-1 might play an important role in mechanoelectric feedback, so it could reduce the occurrence of arrhythmia that was induced by extra mechanical stretch.
Feedback ; Heart Ventricles/*metabolism ; Mechanotransduction, Cellular ; Potassium Channels, Tandem Pore Domain/*metabolism ; Random Allocation ; Rats, Wistar ; Stress, Mechanical

Objective To observe the immunostaining of endothelin-1(ET-1) and von Willebrand factor(vWF) in pulmonary vascular of ventricular septal defect(VSD) with pulmonary hypertension(PH),and the possible roles of ET-1 and vWF in the development of PH and remodeling in pulmonary artery.Methods VSD with non-PH were choosed as control group,20 cases with VSD with PH were divided into Ⅰgroup and Ⅱgroup according to mean pulmonary artery pressure. The specimens from middle lobe of right lung was obtained and stained by immunohistochemical technique.The degree of immunoreaction was measured with light density.Results The light density of ET-1 and vWF in small pulmonary arteries had significant statistical difference between every group,and Ⅱgroup was higher than those of Ⅰgroup,but no difference in small pulmonary veins.In every group,the light density of ET-1 and vWF had significant difference between small pulmonary arteries and pulmonary veins.There were statistical correlation among mean pulmonary pressure,VSD/A,ET-1 and vWF.Conclusions ET-1 and vWF are concerned with the development of PH and mediate pulmonary vascular remodeling.The data of small pulmonary veins suggest that the main origin of ET-1 in pulmonary tissue is small pulmonary artery.