Nanotubes, Carbon ; adverse effects ; chemistry

Objective To investigate protective effects and mechanism of folic acid on brain neural cells in preeclampsia rat model.Methods Adult pregnant Wistar rats were randonly divided into 4 groups (n = 10 in each group).Rats in model group were injected intraperitoneally with homocysteine (Hcy,200 mg · kg-1 · d-1) daily and were injected subcutaneously every other day with monosodium glutamate (MSG,1 g · kg-1 · 48 h-1) from the 10th day of pregnancy to establish the model of preeclampsia. Lowdose folic acid (low dose group 10 ng · kg-1· d-1) and high-dose folic acid (high dose group 20 mg · kg-1 · d-1 ) were given intragastric administration with folic acid tablets dissolved in saline daily at the same time of establishing model.Rats in control group were injected or intragastric administration with the same dose of saline as above up to the 20th day of pregnancy.Brain tissue was fixed on the 20th day of pregnancy, so was that plasma folic acid was measured with automatic electro-chemiluminescence.Rats' immunohistochemical staining.bcl-2 mRNA and protein expression changes were observed by using reverse transcription(RT) -PCR and western blot.Results ( 1 ) Plasma folate concentrations were ( 39.5 ± 3.4 )nmol/L in low dose group and (40.1 ±5.4) nmol/L in high dose group, which were all significantly higher than (26.9 ± 6.7 ) nmol/L in model group( P ＜ 0.01 ).Plasma folate in low dose and high dose group did not show significant difference( P ＞ 0.05 ); ( 2 ) Apoptosis cell were 48.2 ± 9.1 in low dose group and 44.7 ±8.3 in high dose group, which were significantly lower than 75.8 ± 10.1 in model group (P＜0.01).However, apoptosis cell in low dose and high dose group did not show significant difference( P ＞0.05 ) ;(3 )significant difference( P ＞ 0.05 ); (4) bcl-2 mRNA and protein expression were 0.98 ± 0.49 and 0.89 ±0.52 in low dose group and 0.95 ± 0.38 and 0.92 ± 0.47 in high dose group which was significantly higher than 0.62 ± 0.20 and 0.45 ± 0.37 in model group ( P ＜ 0.01 ); bcl-2 expression in low dose and high dose group showed no significant difference ( P ＞ 0.05 ).Conclusions Folic acid has a protective role on neural activation and promoting bcl-2 gene and protein expression.

Objective To investigate the effects of astragalosides(AST)on angiogenesis of myocardium in rats after myocardial infarction.Methods Myocardial infarction(MI)was induced by ligation of the proximal left anterior descending coronary artery,30 postoperative rats were randomly divided into three same-size groups,i.e,medical group A(AST 2.5 mg · kg-1 · d-1),medical group B(AST 10mg · kg-1 · d-1)and control group(physiological saline).All of three groups were treated with intraperitoneal injection of 2ml dose for 4 weeks.The pathological changes of the heart tissue were observed by H-E staining and the micro-vascular count(MVC)/micro-vascular density (MVD)were calculated by CD34-staining.Results HE staining showed cardiac fabric disarrangement,granulation tissue generation,and fibroblast proliferation;The change of medical groups was less obvious than the control group; the change of group B with higher dose was less obvious than group A.CD34 staining showed that regeneration of neovascularization at the margin of myocaardium infarction was seen in all of three groups;for the MVC/MVD,medical groups were significantly higher than the control group,while group B is significantly higher than group A (all P ＜0.01).Conclusion AST can improve myocardial ischemia of rats after myocardial infarction.AST can promote angiogenesis in ischemic myocardium of rats,and the effect is positively correlated with AST dose.

Objective To study the effect of chronic poisoning of ketamine on brain cell apoptosis in adult mouse under different duration and doses. Methods The mouse model of chronic poisoning of ketamine was established on adult mouse by tail vein injection of ketamine twice every week with different doses (4, 10, 20 and 30 m g/kg). The mice were sacrificed after continuous injection of ketamine of 1, 2, 4, 8 and 12 weeks. The qualitative assessment of apoptosis was made by transmission electron microscope and the quantitative assessment was made by Caspase-3 im m umofluorescence staining method and terminal deoxynucleotidyl transferase-mediated dU TP nick end labeling (TUNEL ) to estimate the time point of apoptosis. All the experimental results were statistically analyzed. Results The neuron apoptosis was ob-served in hippocam pus and corpus striatum by transmission electron microscope one week after adminis-tration, and continued for eight weeks. High level of Caspase-3 expression was observed one week after administration, but with a lowlevel expression after 4 weeks. The num ber of TUNEL positive cells ob-viously increased one week after administration and maintained in ahigh num ber at 4 weeks. Conclu-sion Ketamine by tail vein injection could induce neuron apoptosis in adult mouse.

an those received RH (29% vs. 9%, P=0.042). Conclusion NSRH is safe and feasible surgical management for cervical cancer patients, which would improved the physiology of pelvic autonomic nerve postoperatively.

Objective To compare and analyze clinical and pathological data of autopsyconfirmed invasive fungal disease (IFD) in elderly patients in order to achieve a better understanding of the clinical and pathological characteristics of IFD.Methods A total of 18 cases of IFD were diagnosed by autopsy from 1984 to 2014 at Beijing Hospital.Clinical and pathological data of IFD,including risk factors,clinical manifestation,X-ray and pathological characteristics,were analyzed retrospectively.Results The 18 cases were all male wvith an average age of (83.7±7.2) years and each patient had at least one risk factor for IFD.Of them,14 patients (77.8％) suffered malignancies of various origins.With respect to the pathogens,Mucor (6 cases) was the most common one,followed by Aspergilla (4 cases),Mycotoruloides (4 cases) and Cryptococci (2 cases).The lung was the most frequently implicated organ wvith 13 cases (72.2％),followed by the gastrointestinal tract.Vascular erosion was an important pathological characteristic of fungal infection,whose presentations included vasculitis,hemorrhage and embolism in tissues and organs.14 patients died from fungal infection-related causes,of which.massive hemorrhage as a result of vascular erosion by fungal infection was responsible for four patients' deaths.Conclusions Malignancies are an important risk factor for invasive fungal disease in elderly patients.Vascular erosion is a significant character of fungal infection.

Aim To establish a LC-MS/MS method for the determination of pirfenidone(BT)and its major metabolite 5-carboxy-pirfenidone(SBT)in human plasma.Methods Human plasma samples containing BT and SBT,as well as their corresponding deuterium-labeled internal standards pirfenidone-d5(dBT)and 5-carboxy-pirfenidone-d5(dSBT),were precipitated using methanol.Chromatographic separation was carried out on an Agilent ZORBAX SB C18(3.0 mm×100 mm,3.5 μm)column with the mobile phase of water(0.5％formic acid)and acetonitrile(50/50).The detection of analytes was performed on a tandem mass system equipped with an electrospray ionization source in positive ion mode using multiple-reaction monitoring.The MS/MS ion transitions monitored were m/z 185.958→77.1 for BT,m/z 215.944→77.0 for SBT,m/z 190.965→81.1 for dBT and m/z 220.948→99.1 for dSBT.Results There was no remarkable interference in blank solvent,plasma,and there was no mutual interference between analytes or internal standards.The proposed method showed good linearity over the concentration range of 0.020 59～25.14 mg·L-1 for BT and 0.016 73～20.42 mg·L-1 for SBT.The intra-batch and inter-batch precision and accuracy were proved to be acceptable.Human samples kept stable after 4 h at room temperature,the three freeze-thaw cycles and 10,29 and 52 days at-70 ℃,and the processed samples remained stable after 24 h in the autosampler.The average extraction recovery and matrix effect were precise,reproducible and acceptable.Conclusion Our current LC-MS/MS method is proved to be sensitive,accurate and convenient,and could be suitable for the clinical pharmacokinetic studies of BT-related preparations.

Objective To observe the effect of mesenchymal stem cells ( MSC) in treating ischemic diabetic ulcers, and to explore its clinical perspectives. Methods Prepared electro-spinning biomaterials and cultured MSC to study effect of MSC composite biomaterials in vitro by scanning electron microscope,MTT array and influence of MSC conditioned medium on endothelial cells. The use of 5 to 8 week old male C57BL/6J mice were prepared into diabetic mice,femoral artery ligation in the proximal thigh,in dorsal skin full-thickness wounds caused by the diameter 5 mm. Then the effect of MSC composite biomaterials on ischemic diabetic ulcers was determined. Results This study found that the MSC grow well on electro-spinning biomaterials. Cells foot extension and connections between cells were observed by scanning electron microscope. Stimulated by high glucose,growth and proliferation of MSC has a stronger ability on biomaterials. MSC condi-tioned medium on biomaterials increased human umbilical vein endothelial cells proliferation ability. Conclusion MSC composite biomateri-als can effectively improve the treatment effect of MSC on ischemic diabetic ulcers. The study indicated stem cells composite biomaterials have great potential and application prospect in the treatment of ischemic diabetic ulcers healing.

Objective To investigate the anti-tumor effects of total saponins,extracted from stems and leaves ofParispolyphyllavar.yunnanensis. Methods Taking mouse stomach carcinoma MFC cell line,human mammary cancer cell line(MCF-7)and human cervical carcinoma cell line(Hela),and their tumor-bearing mice as models,the antitumor activity was carried out in vitro and in vivo. CCK-8 assay was used to determine the inhibitory effect in vitro. The tumor-bearing mice model was induced by tumor cell vaccination in normal mouse forelimb left axillary subcutaneous and these mice were randomized into NS group,cytoxan group(30 mg/kg),saponins high-dose,medium-dose and low-dose groups(60,30 and 15 mg/kg). They were given intraperitoneal injection once a day for consecutive 15 days. The tumor inhibition rate and survival of the tumor-bearing mice were measured. Results Saponins,extracted from both aboveground and underground ofP.polyphyllavar.yunnanensis could significantly inhibit the growth of MFC,MCF-7 and Hela cells in time- and dose-dependent manners. The tumor weight in each drug treated group was significantly lower than that in the control group. Conclusion Saponins,extracted from both aboveground and underground ofP.polyphyllavar.yunnanensis have antitumor activity.

Antigens, CD ; metabolism ; Antigens, Differentiation, Myelomonocytic ; metabolism ; Face ; microbiology ; Female ; Humans ; Middle Aged ; Mycobacterium avium Complex ; isolation & purification ; Mycobacterium avium-intracellulare Infection ; metabolism ; microbiology ; pathology ; Nasal Cavity ; microbiology ; Nose Diseases ; metabolism ; microbiology ; pathology ; Vimentin ; metabolism