Animals ; Dose-Response Relationship, Drug ; Perchlorates ; toxicity ; Quaternary Ammonium Compounds ; toxicity ; Rabbits

Adenocarcinoma, Clear Cell ; pathology ; Humans ; Kidney Neoplasms ; pathology ; Male ; Middle Aged ; Neoplasm Metastasis ; Thyroid Neoplasms ; secondary

Animals ; Lung ; drug effects ; metabolism ; Perchlorates ; toxicity ; Quaternary Ammonium Compounds ; toxicity ; RNA, Messenger ; genetics ; Rabbits ; Transforming Growth Factor beta1 ; genetics ; metabolism ; Tumor Necrosis Factor-alpha ; genetics ; metabolism

OBJECTIVE To investigate the effect of quercetin on primary cultured newborn rat cortex neuron cell which is estrogen depletion, and discuss the possible mechanism, to provide new ideas and strategies for developing a drug of neurodegenerative disease. METHODS Rat cortex neurons were isolated from one day old Sprague Dawley rats and treated with estrogen, quercetin and estrogen receptor antagonists (ICI182,780). Cell viability was determined by MTT assay, neurite outgrowth was measured by fluorescent microsope and estrogen receptors were determine by Western blot. RESULTS Quercetin functions like estrogen to increase cortex neuronal cell viability, the Que (50, 100 μmol·L-1) group compared with the control group could significantly improve the activity of the cortical neurons(P<0.05). It can also increase neurite out growth, the Que (50,100 μmol·L-1) group significantly promoted the formation of synapse, most of the neurons were full, and the synapses of neurons became thick, growth, and connect to a dense neural network. And in the Western blot experiments, Que (50, 100 μmol·L-1) group could obviously increase the expression of estrogen receptor alpha protein, in addition, the neural protective effect of quercetin can be inhibited by ICI182,780. CONCLUSION Quercetin like estrogen can protected cortex neuronal and the effect of quercetin on cortex neuronal cells was mediated by estrogen receptor alpha.

BACKGROUND:Finite element method is widely used in the femoral neck fracture, but the study concerning different fixation methods of femoral neck fracture is not much. OBJECTIVE:To analyze biomechanical properties of different fixation methods for femoral neck fracture using finite element analysis. METHODS:The femur of voluntters was scanned with CT, at thickness 0.6 mm, from the site above the greater trochanter of the femur. Scanning data were saved in .DICOM format. Data of right proximal femur were imported into Mimics software. Osteotomy was performed according to Pauwels I type fracture. Models of two tensile force screws, ful y threaded hol ow screw and proximal femoral locking plate were established. Three-dimensional finite element method was used to analyze stress distribution, stress concentration position, displacement distribution and maximum displacement in different models of femoral neck fracture with different internal fixation methods. RESULTS AND CONCLUSION:(1) The maximum stress value of two lag screws model was biggest. The maximum stress value of ful y threaded hol ow screw model was minimized. The maximum stresses of two lag screws model, ful y threaded hol ow screw model and proximal femoral locking plate model al were concentrated in the fixed end of fractures. (2) The femoral maximum stress of two lag screws model was biggest. The femoral maximum stress value of proximal femoral locking plate model was minimized. The femoral maximum stresses of two lag screws model, ful y threaded hol ow screw model and proximal femoral locking plate model al were concentrated in the medial femoral smal rotor near and medial femoral and fixation contact points. (3) The maximum displacement of two lag screws model was biggest. The maximum displacement of ful y threaded hol ow screw model was minimized. The maximum displacement of two lag screws model, ful y threaded hol ow screw model and proximal femoral locking plate model al was in the femoral head. (4) The maximum displacement value of two lag screws model fixed place was biggest. The maximum displacement value of ful y threaded hol ow screw model fixed place was minimized. The maximum displacement value of two lag screws model was biggest at femoral head. The maximum displacement value of ful y threaded hol ow screw model was minimized at femoral head. (5) Results showed that the treatment effect of ful y threaded hol ow screw on Pauwels I fractures was better than other two fixation methods.

OBJECTIVETo exacted analysis each time interval in isovolumic relaxation time (IVRT) of normal subjects through observin the changes of cardiac structure and hemodynamics during the IVRT. Then to provide the evidence of cardiac resynchronization therapy.

METHODSQuantitative analysis was performed for 60 subjects. The dual-channel echocardiography(DCE), pulse wave doppler (PW) and tissue wave dapper (TDI) examination of all the subjects were recorded, and IVRT was divided into two intervals, isovolumic relaxation time of early intervals (IVRTe) and isovolumic relaxation time of late interval (IVRT1). Then measured the time of each interval. Indicators were used including: (1) IVRT; (2) IVRTe; (3) IVRTI; (4) IVRTI/IVRT; calculating the data after heart rate corrected; (5) cIVRT; (6) clVRTe; (7) clVRTI; (8) clVRTI/clVRT; (9) measuring the time difference in mitral blood and tissue (TE-é) of DCE group.

RESULTSThe i-wave within IVRT in PW images was found in 45 subjects, and the i-wave was about 1/2 of IVRT (49.17 +/- 5.37) ms. IVRT was divided into IVRTe and IVRTI by a turning point at descending branch of i-wave as t-point. The j-wave was observed in 84% TDI images, and the j-wave was about 1/2 of IVRT (43.13 +/- 4.83) ms. IVRT was divided into IVRTe and IVRTI by a turning point of the onset of j-wave as t-point. A significant difference was found between PW and TDI with measurement of IVRT, IVRTe, IVRTI (P < 0.05). There were no significant differences between the common group and DCE group (P > 0.05). After heart rate corrected, the data showed no significant difference using pairwise comparisons among the three groups (P > 0.05). The mean and standard deviation of IVRTI/IVRT, cIVRTI/clVRT were (0.50 +/- 0.12) ms. There were little difference of time intervals and good consistenc using DCE measured IVRT with multiple tests confinmed.

CONCLUSIONThe study found that IVRT might be divided into IVRTe and IVRT1 phases. There were i-wave in IVRTe and j-wave in IVRT1. The t-point was nearly midpoint inisovolumic relaxation time.

Adult ; Diastole ; physiology ; Echocardiography ; Female ; Healthy Volunteers ; Humans ; Male ; Middle Aged ; Ventricular Function, Left ; physiology

Cellulosic material is the most abundant renewable carbon source in the world. Cellulose may be hydrolyzed using cellulase to produce glucose, which can be used for production of ethanol, organic acids, and other chemicals. Cellulase is a complex enzyme containing endoglucanase (EC 3.2.1.4), exoglucanase (EC 3.2.1.91) and cellobiase (EC 3.2.1.21). The hydrolysis of natural cellulose to glucose depends on the synergism of these three components. The mostly used cellulase produced by Trichoderma reesei has high activity of endoglucanase and exoglucanase, but the activity of cellobiase is relatively low. Therefore, improving the activity of cellobiase in cellulase reaction system is the key to enhance the sacchrification yield of cellulosic resources. Aspergillus niger LORRE 012 was a high productivity strain for cellobiase production. It was found that the spores of this strain were rich in cellobiase. In this work, the cellobiase was immobilized efficiently by simply entrapping the spores into calcium alginate gels instead of immobilizing the pure cellobiase proteins. The immobilized cellobiase was quite stable, and its half-life was 38 days under pH 4.8, 50 degrees C. The thermal stability of the immobilized cellobiase was improved, and it was stable below 70 degrees C. The suitable pH range of the immobilized cellobiase was pH 3.0 - 5.0, with the optimal pH value 4.8. The Km and Vmax value of the immobilized cellobiase were 6.01 mmol/L and 7.06 mmol/min x L, respectively. In repeated batch hydrolysis processes, 50 mL of substrate (10 g/L cellobiose) and 10 mL of immobilized beads containing cellobiase were added into a 150 ml flask. After reacting at pH 4.8, 50 degrees C for several hours, the hydrolysate was harvested for assay, and the immobilized beads were used for the next batch hydrolysis with the fresh substrate. This process was repeated, and the yield of enzymatic hydrolysis kept higher than 97% during 10 batches. The continuous hydrolysis process was carried out in a column reactor (inside diameter 2.8 cm, inside height 40 cm) packed with the immobilized beads. Using 10 g/L cellobiose as substrate, the hydrolysis yield reached 98% under 0.4 h (-1) dilution rate and pH 4.8, 50 degrees C. After corncob was treated by 1% dilute acid, the cellulosic residue (100 g/L) was used as substrate, and hydrolyzed by the cellulase (15 IFPU/g substrate) from Trichoderma reesei, at pH 4.8, 50 degrees C for 48 h. The concentration of reducing sugar in the hydrolysate was only 48.50 g/L (hydrolysis yield 69.5%). When the hydrolysate was further treated by the immobilized cellobiase, the cellobiose was hydrolyzed into glucose, and the feedback inhibition caused by the cellobiose accumulation disappeared sharply. By the synergism of immobilized cellobiase and the cellulase from T. reesei left in the hydrolysate, other oligosaccharides were mostly converted to monosaccharides. At 48 h, the reducing sugar concentration was increased to 58.78 g/L, the hydrolysis yield of the corncob residue was improved to 84.2%, and the ratio of the glucose in the total reducing sugar was increased from 53.6% to 89.5%. The reducing sugars converted from corncob could be used further in the fermentation of valuable industrial products. This research results were meaningful in the conversion and utilization of renewable biomass.
Aspergillus niger ; enzymology ; Biotechnology ; Cellobiose ; metabolism ; Enzyme Stability ; Hydrogen-Ion Concentration ; Kinetics ; Temperature ; beta-Glucosidase ; chemistry ; metabolism

OBJECTIVETo evaluate the efficacy and safety of Yigan Fupi Decoction (YFD) in the treatment of irritable bowel syndrome with diarrhea (IBS-D) patients.

METHODSA randomized controlled clinical trail was carried out in patients with IBS-D. All patients were randomly assigned to the treatment group (58 cases, treated with YFD) and the control group (58 cases, treated with Pinaverium Bromide Tablet). The treatment course was 4 weeks for all patients. The total effective rate, the stool property and state, the quality of life (QOL), and TCM syndrome efficacy were assessed by IBS bowel symptom severity scale (IBS-BSS), IBS defecation state questionnaire (IBS-DSQ), IBS quality of life questionnaire (IBS-QOL), and traditional Chinese medicine pattern curative effect scoring system (TCM-PES) before and after treatment.

RESULTSThere was no statistical difference in the total effective rate between the two groups (82.76% vs. 77.59%, P > 0.05). The treatment group was superior in the total IBS-BSS integral to the control group (P < 0.05). The total effective rate of improving the stool property was better in the treatment group than in the control group (81.03% vs. 72.41%, P < 0.05). Besides, the number of days for emergent defecation among 10 days was less in the treatment group than in the control group (P < 0.05). The improvement of the total IBS-QOL integral and the total integral of TCM syndrome were better in the treatment group than in the control group (P < 0.01). The total effective rate of TCM-PES was better in the treatment group than in the control group (84.48% vs. 70.69%, P < 0.05).

CONCLUSIONYFD was effective in the treatment of IBS-D patients of Gan-qi invading Pi syndrome, and could effectively relieve bowel symptoms, improve the stool property and the defecation frequency, elevate their QOL, and attenuate Gan-qi invading Pi syndrome with favorable safety and compliance.

Adult ; Diarrhea ; drug therapy ; Drugs, Chinese Herbal ; therapeutic use ; Female ; Humans ; Irritable Bowel Syndrome ; drug therapy ; Male ; Middle Aged ; Morpholines ; therapeutic use ; Quality of Life ; Treatment Outcome

Objective To study the changes of serum interleukin(IL)-4,IL-12 and correlation with cellular immunity in children with asthma of different stages.Methods Fifty asthmatic children were randomly selected, including 30 cases in attack stage (group A) and 20 cases in remission stage (group R). At the same time, 22 healthy children were studied as normal controls (group N).The levels of IL-12 and IL-4 ,T cells subgroups and erythrocyte immunity were detected.Results 1.Serum IL-12 levels were (24.44? 13.26 ),(42.30?12.65),(44.68?28.28) ng/L in group A, R and N,respectively. There was significant difference in three groups (F=8.92 P

AIM: To investigate the effect of peribulbar anesthesia on intraocular pressure(IOP)and ocular amplitude pulse(OPA).METHODS: Thirty-two consecutive adult patients with monocular cataract enrolled in this study. IOP and OPA were measured with dynamic contour tonometer(DCT)before and 3, 10 minutes after administration of lidocaine anesthesia. Data were analyzed with software SPSS 11.5.RESULTS: The IOP remained stable in the injected eyes and the non-injected eyes after administration of lidocaine anesthesia. The OPA was significantly decreased after injection of anesthesia agent in the injected eyes. The OPA in the non-injected eyes increased significantly 3 minutes after injection of the anesthesia agent, returning to preinjection level 10 minutes after the injection.CONCLUSION: Peribulbar anesthesia leads to decrease of OPA and shows no effect on IOP in the injected eyes.