The structural and functional study of protein is a major topic of current functional genomics. Fluorescence resonance energy transfer (FRET) is one of few tools available for measuring nanometer scale distances and changes in distances in vivo . FRET is an ideal technology for detection of protein conformation and protein-protein interaction by using fluorescence protein, traditional organic dyes and other dyes as probes. It uses fluorescence protein, traditional organic dyes and other dyes as its probes. The application of FRET in the determination of intracellular events would be helpful for us to understand the structure and function of biology molecules. [

Objective To observe the bacterioflora of bile and it' s drugs sensitivity in patients with bile duct diseases to serve as a guidance in medication. Methods Bile of 156 cases of patients with biliary disease was collected and cultured respectively during endoscopic retrograde cholangiopancreatography (ER-CP) by deep cannulation and sucking out bile through the catheter. Forty eight blood samples among them were cultured simultaneously. Ten kinds of drug papers were used to investigate the bacterial sensitivity. The data were analysed statistically- Results Bacteria positive rate of these 156 bile samples was 62. 8% , including Gram - negative bacteria (81.6% ) and Gram - positive bacteria (18. 4% ). These bacteria consist of Pseudomonas aeruginosa (35. 1% ) , Escherichia coli(22. 8% ) , Streptococcus faecalis (16.7%) ,Entero bacilliaerogenes(7. 9% ) ,Klebsiella(7. 0% ) , Citrobacter(6. 1% ) ,Acinetobacler lwqffi(2. 6% ) and Staphylo-coccus aureus( 1. 7% ). The bacteria positive rate was only 4. 2% in the 48 blood samples. Drug sensitive rates of bacteria against 10 kinds of drugs were changed in recent years. The result indicated that the sensitive rates of bacteria were significantly higher in ciprofloxacin, fortum, cefoperazone, sulbactam + cefoperazone and cilastatin than those in ampicillin,azlocillin, cefazolin sodium, eefuroxime(P

Objective: The caracteristics of rapid arrhythmia in the south region of our country are simultaneous appearance of phlegm. heat, blood stasis and deficiency, and slow arrhythmia are intermingled deficiency. blood stasis and phlegm. Thus, they were treated respectively by clearing away heat, eliminating Yang and removing blood stasis, and warming Yang to remove blood stasis respectively. Results: The total effective rate was 96. 55% in 261 cases of rapid arrhythmia treated by modified Ding Xin Decoction, and 78. 46% in the control group with a significant difference between the two groups (P

Objective To determine the effect of therapeutic ERCP(endoscopic retrograde cholan-giopancreatography) on endoscopic drainage of pancreatic pseudocysts and patency of main pancreatic duct after dilation or placement of stent. Methods Eight patients with pancreatic pseudocyst were selected after abdominal ultrasonography and computed tomography. All patients have had be operated two times because of acute pancreatitis and /or cholangitis, and were hard to receive further operation. These patients underwent endoscopic transpapillary drainage by main pancreatic duct dilation or placement of stents after ERCP, and were follow up by abdominal ultrasonography and / or computed tomography 6 months after drainage. The stent would be pulled out after the complete disappearance of the cyst. Results Diagnostic ERCP revealed that cysts communicated with main pancreatic duct in 3 cases and obstructive jaundice was present in 1 case. All patients were managed by transpapillary main pancreatic duct dilation (3 cases) and placement of stents (5 cases). Both forms of endoscopic drainage were effective in treating pancreatic pseudocyst and in 7 cases the cysts were completely disappeared within 4 months, while the rest one required surgery as the cyst merely decreased in size. Only 2 cases the levels of amylase in serum and urine were higher than normal but no severe complications occurred. Conclusion Endoscopic transpapillary drainage through main pancreatic duct dilation or placement of stents is quietly an effective, painless and safe mode in treating pancreatic pseudo-cyst. This method may be an ideal choice for the treatment of pancreatic pseudocysts in experts.

Object To study the effect of puerarin on the expression of inflammatory factors and miR-155-3p in human umbilical vein endothelial cells ( HUVEC) induced by visfatin.Methods The HUVEC cell injury model was es-tablished with visfatin.Cell proliferation was measured by MTT assay.Cell apoptosis was detected by flow cytometry.The level of CRP and NF-κB was detected by ELISA, and the expression of miR-155-3p was detected by RT-PCR.The expres-sion of myeloid differentiation factor 88 ( MyD88) was identified by western blotting.Results Visfatin induced cell prolif-eration and inhibited apoptosis in HUVEC, meanwhile the expressions of both CRP and NF-κB were significantly increased, compared with that of the control group (P<0.01).Puerarin at moderate and high concentrations obviously reduced the HUVEC injury induced by visfatin, mainly through down-regulating the expression of CRP and NF-κB, as well as up-regu-lating the level of miR-155-3p in the HUVEC.MiR-155-3p mimic markedly decreased the level of MyD88, CRP and NF-κB in the HUVEC induced by visfatin (P<0.05).Conclusions Pueprarin obviously alleviates HUVEC injury induced by visfatin, probably related to down-regulating the level of MyD88, CRP, NF-κB, and up-regulating the expression of miR-155-3p in HUVEC.

[ ABSTRACT] AIM: To investigate whether L-carnitine ( LC) inhibits the eryptosis effect of uremic serum on erythrocytes.METHODS:Erythrocyte suspension (2%) was cultured and divided into 3 groups in vitro: control group ( C group) , uremic serum group ( U group, 30%uremic serum) , and uremic serum+LC group ( L group, 30%uremic serum+200 μmol/L LC) .Erythrocytes were collected at 24 h and 48 h.Eryptosis ( phosphatidylserine expression repre-sents eryptosis) was estimated by flow cytometry with Annexin V staining.The content of reactive oxygen species ( ROS) was also detected.Glutathione ( GSH) was measured by ELISA.RESULTS:Eryptosis in C group was increased as the in-cubating time extended.Eryptosis in U group was higher than that in C group, while that in L group was lower than that in U group.Meanwhile, ROS content was higher and GSH was lower in U group than those in C group.ROS content was low-er and GSH was higher in L group than those in C group.CONCLUSION:LC inhibits uremic serum-induced eryptosis by decreasing ROS and increasing GSH, thus attenuating oxidative stress.

Objective: To investigate the anti-tumor effect of Glycyrrhiza flavonoids(GF) and its immunological mechanism.Methods: Mice bearing sarcoma 180(S180) were randomized into 3 GF-treated groups and one control group.The mice in GF-treated groups were perfused with GF.Leukocyte and lymphocyte count were taken by the blood cell analyzer.Flow cytometry was performed to detect the percentages of the T cell subsets.Results: Treatment of GF resulted in the tumor inhibition rates of 52.3%(high dose group).Blood total leukocyte and lymphocyte count in GF treated groups were all higher than that in the control group,and there was the most significant increase of the number of immune cells in the high dose GF group(P

Objective To examine the effects ofulinastatin (UTI) on cardiac dysfunction in mice with heat stroke and its possible mechanism.Methods 20 mice were divided into four groups randomly:room temperature plus normal saline (Sham+NS),room temperature plus UTI (Sham+UTI),heat stress plus normal saline (HS+NS),heat stress plus UTI (HS+UTI),5 each.105U/kg UTI was delivered by intraperitoneal injection before the onset of the heat stress.Room temperature groups were housed at room temperature (23.0 ± 0.5 ℃),while heat stress groups were kept in an incubator at 36.5 ± 0.5 ℃ and humidity of 65.0％ ± 2.0％.The rectal temperature (Tr) reaching 42℃ was taken as severe heat stroke,and the time in two heat stress groups was recorded.The mice were transferred to the room temperature (23.0 ± 0.5 ℃) for natural cooling after the heat stroke onset.6 hours after the treatment,cardiac output (CO) was ultrasonographically detected,the myocardium was separated for histopathological examination and the expression of total p38 and phosphorylated p38 (p-p38) was determined by Western blotting.Results The time to reach 42℃ in HS+UTI group was significantly prolonged (P=0.044).Compared with the Sham+NS group,the CO in HS+NS and HS+UTI group decreased significantly (P=0.017),and the score of myocardial inflammation (P＜0.001) and p-p38/p38 ratio (P＜0.001) increased.The CO was significantly higher in HS+UTI group than in HS+NS group (P=0.030),and the score of myocardial inflammation (P＜0.001) and p-p38/p38 ratio (P=0.001) were significantly lower.Conclusion Ulinastatin might improve the cardiac function in mice with heat stroke by decreasing the p-p38 and alleviating the inflammation response.

OBJECTIVE: To analyze external factors affecting auditory ability of infants and toddlers after cochlear implantation in the first year of switch-on. METHOD: Seventy-five infants and toddlers after cochlear implantation were selected as subjects, using LittlEARS Auditory Questionnaire to assess and analyze the correlations with auditory ability and external factors (including gender, cochlear implanted age, pre-implant hearing aid fitting, caregivers' education background, household income and rehabilitation modes) in different stages (before switch-on, and 3 months, 6 months, 9 months, 12 months after switch-on). RESULT: The mean scores of LittlEARS were significantly different in cochlear implanted age group, pre-implant hearing aid fitting group and rehabilitation modes group (P < 0.05), and there was no significant difference in other groups such as external factor gender, caregivers' education background and household income (P > 0.05). The correlations with the mean scores of LittlEARS and cochlear implantation age or pre-implant hearing aid fitting were significant at 3 months or 6 months after switch-on(/r/ ≥ 0. 3, P < 0.01). However, the correlation with the mean scores of LittlEARS and rehabilitation modes was significant at 12 months after switch-on(/r/ > ≥ 0.3, P < 0.01). CONCLUSION Cochlear implanted age and pre-implant hearing aid fitting were the important factors affecting auditory ability of infants and toddlers after cochlear implantation in the first year of switch-on. The effect of rehabilitation modes on auditory ability of infants and toddlers after cochlear implantation was slow.
Age Factors ; Child, Preschool ; Cochlear Implantation ; Cochlear Implants ; Deafness ; rehabilitation ; Hearing ; Hearing Aids ; Humans ; Infant ; Surveys and Questionnaires

Objective To prepare a new kind of targeted liposome ultrasound contrast agent with small peptide K237 as the ligand which can combine specifically with KDR which is the main receptor of VEGF.and to test its capability in vitro. Methods Targeted bubbles(P-Bio-Av-Bio-Mbs) were formed through "biotin-avidin" bridge grafting, then they were incubated respectively with LOVO, HUVECs and LS174T which were KDR positive or negative expressed in various cells,meanwhile incubated LOVO cells with FITC- P-Bio-Av-Bio-Mbs,FITC-P-Mbs and FITC-Mbs respectively. After that, the rosette formation rate and fluorescence intensity of the combination between microbubbles and cells were observed with microscope and fluorescence microscope. After being incubated with small peptide K237 of 10 μg and 50 μg, LOVO cells were incubated with P-Bio-Av-Bio-Mbs for observing the distribution of microbubbles. Results In KDR sharply positive expressed LOVO cells, the surrounding rosette formation rate was as high as 90. 52% with the fluorescence intensity of grade 3, and it was 53. 46% with grade 2 fluorescence intensity rate in KDR positive expressed HUVECs cells, while in KDR negative expressed LS174T cells, there were few microbubbles surrounded with rosette formation rate of 5. 57% and fluorescence intensity rate of grade 0-1, therefore there were significant statistic differences in rosette formation rate among groups ( P < 0.05). After LOVO cells combined with FITC-P-Bio-Av-Bio-Mbs, FITC-P-Mbs and FITC-Mbs respectively,there were significant differences in their rosette formation rate, namely 89.62%, 7. 56% , 0 with the fluorescence rate of 3,0 - 1 and 0 respectively. Targeted cells pretreated with 10 pg K237 showed significant decreased rosette formation,and there was no formation in 50 ?g pretreated group. Conclusions KDR-Targeted liposome contrast agent with small peptide K237 liganded has been successfully prepared through biotin-avidin mediation and could combine specifically and high efficiently with targeted cells in vitro. The KDR-targeted molecular imaging of tumor neovascularizaiton may provide a new approach for early diagnosis of carcinoma.