Air Pollutants, Occupational ; analysis ; Naphthols ; analysis ; Spectrophotometry ; methods ; Workplace

Objective To predict and screen the B-cell epitopes on nucleoprotein(NP)of human avian H5N1 virus strain.Methods As NP nucleotide sequences of strain A/GD/01/06(H5N1)were sequenced,B-cell epitopes were predicted by the analysis of the flexible regions of secondary structure for NPprotein and by screening on B-cell epitopes for NP protein with methods of Hydrophilicity Plot by KyteDoolittle,Surface Probability Plot by Emini,and Antigenic Index by Jameson-Wolf.Then a screening method was established by Hierarchical cluster,Bivariate correlate and Quartiles in SPSS13.0.and the variation of amino acids in NP protein was appraised in epitope prediction.Resuits The computer-predicted most possible epitopes for NP protein were located within or nearby its N-terminal 317-326,452-457,467-473,367-370,491-498,375-378,171-177,48-53,245-250.76-104 and so on.NP protein in A/GD/01/06(H5N1)increased a glycoprotein domain(NES368-370)by the substitution of N370S and changed the bio-features.Conclusion Stepwise prediction of the B-cell epitopes for the NP protein based on multiple parameters is helpful for the molecular-immunology and drug-screening,and the substitution of N370 S in NP of A/GD/01/06(H5N1)varied its antigenicity but didn't change the epitope size(SNEN367-370).

Adult ; Aged ; Aged, 80 and over ; Biliary Tract Neoplasms ; complications ; Cholangitis ; etiology ; Cholestasis ; etiology ; therapy ; Drainage ; adverse effects ; Female ; Hepatic Encephalopathy ; etiology ; Humans ; Intraoperative Period ; Jaundice, Obstructive ; etiology ; therapy ; Liver Neoplasms ; complications ; Male ; Middle Aged ; Pancreatitis ; etiology ; Stents ; adverse effects

Objective: To study the influence of high cell incubating temperature on AMP-activated protein kinase(AMPK) activity and lipid metabolites of piglets hepatocytes in vitro.Method: Primary hepatocytes of piglets about age 55d were separated and cultured under 37 ℃(control) or 42 ℃(heat stress).The anabolic and catabolic products of [14C]-oleic acid were detected for hepatocytes and culture media at 60min,120min and 180min.There were 9 replicates per time point.Result: Heat stress activated AMPK activity and enhanced fatty acid oxidation.The production of [14C]-CO2 and [14C]-acid soluble metabolites(ASM) was higher in heat stress group than in the control.At the same time,heat stress depressed the incorporation of [14C]-oleate into phospholipids,monoglycerides,triglycerides,cholesterol and cholesteryl ester.Conclusion: Heat stress activated AMPK activity and enhanced the formation of anabolic products and depressed catabolic products in piglets hepatocytes in vitro.

BACKGROUND: Serum creatinine (SCr) is the most commonly used parameter to estimate renal function impairement, but there are some shortcomings. Many factors including age, gender, drug, diet, muscle mass and metabolic rate can influence SCr, leading to an inaccurate estimation of kidney impairment. Studies have shown that cystatin C (CysC) is not affected by factors such as muscle mass, age, gender, diet, inflammation or tumor. The present study was undertaken to compare the sensitivity of CysC and SCr in evaluating renal function impairment at early stage of shock. METHODS: Seventy-one patients aged 38.3±21.4 years, who had been treated at the Emergency Medicine Department of the First Affiliated Hospital, Sun Yat-sen University between February 2006 and June 2007, were studied. They were divided into groups A, B, C, and D according to the shock time. Serum sample was drawn from each patient at 1, 2, 3, 4 hours after shock to determine SCr and CysC. CysC and SCr were determined again at 72 hours and 7 days after shock. RESULTS: CysC increased earlier than SCr in the 71 patients, and CysC decreased slower than SCr when shock was corrected. CysC increased at 1 hour after shock. There was a negative correlationship between CysC, SCr and glomerular filtration rate (GFR), especially at early stage of shock. CONCLUSIONS: There is renal injury at early stage of shock. CysC is more sensitive than SCr in assessing renal function at the early stage of shock.

Objective To evaluate the value of reconstruction of three-dimentional CT in development dislocation of hip(DDH)in children.Methods Twelve cases of DDH concluded 4 bilateral and 8 unilateral cases.To sum up,16 sick hips were operated and 8 normal hips were also obtained by three-dimensional CT(Hip speed Fi/x,GE Co).Results 3D reconstruction were used to show femoral head,(acetabulum) and relationship of acetabulum and femoral head respectively.The difference between FNA measurement of sick hips and those of normal hips were significant(P

Objective To investigate the clinical epidemiologic features of transient synovitis(TS) of hip in children occurred in Shen-zhen district.Methods The medical files were reviewed and a standard questionnaire was filled according to the conditions of 705 cases such as pathogeny,clinical manifestation,therapy and prognosis.Results Transient synovitis occurred in a sporadic form all the year round.The peak age of patients with TS was 3-7 years old.The ratio of boys to girls was 2.9:1.About 19.3% patients were attacked an upper respiratory tract infection and 11.9% patients attributed the symptoms to trauma or severe activities before 1 week.A varying degree of painful limp and restriction of movement at the hip were found clinically.All of cases were cured by skin traction.The incidence of recurrence was 6.95%.Conclusions Male predominance is found in TS.It is characteristic of sporadic form in the 4 seasons and intently relation to an upper respiratory tract infection and trauma or severe activities.TS is recurrent and the prognosis is good by skin traction.

Objective To discuss the indication and complication of overhead traction of olecranon for displaced extension-type GartlandⅢ supracondylar fracture of the humerus in children.Methods Total of 87 patients(Gartland Ⅲ) proceeded with overhead skeletal traction of ulnar olecranon,including 68 cases of ulnar deviation and 19 cases of radial deviation.Eighteen cases had complicating revolve deviation.According portable X-ray results in the 2nd and 5th,three-dimension adjustment was performed within 1 week.Five patients were treated by open reduction because of symptoms nerves and blood vessel compression.When X-ray examination showed good callus formation and stable reduction,the patient was discharged after the elbow was stabilized in flexion position with plaster fixation,which was removed in 2 weeks.Results Sixty-seven of 87 patients were followed-up for 18 months.All of them had excellent results except one who had permanent ulnar nerve injury.No cubitus varus was observed.Conclusions The overhead olecranon skeletal traction is a simple,effective method,because it can increase joint motion,relieve elbow swell and pain rapidly,and improve upper limb line of traction.However,open reduction shall be done promptly if there is evidence of nerve,blood vessel or soft tissue between broken ends of fractured bone within 5 days.

OBJECTIVETo investigate the prognostic factors for non-small cell lung cancer(NSCLC)in patients under 40 years of age.

METHODSThe clinicopathological data of 148 young patients with NSCLC were retrospectively analyzed. Kaplan-Meier and Cox regression analyses were used to analyze the relationship between prognostic factors and survival time.

RESULTSThe patients were followed-up for 6 - 148 months, and the follow-up rate was 100%. In the whole group, 122 patients died and 26 cases were surviving. The 1-, 3- and 5-year survival rates were 54.7%, 10.4% and 5.6%, respectively. The median survival time (MST) was 14.7 months. Kaplan-Meier analysis showed that Karnofsky performance status (KPS), clinical stage, treatment modality and serum CEA were related with prognosis (P < 0.05). Multivariate analysis indicated that KPS, clinical stage, treatment modality and serum CEA were independent prognostic factors (P < 0.05).

CONCLUSIONSKPS, CEA, clinical stage and treatment modalities are independent prognostic factors in young NSCLC patients.

Adolescent ; Adult ; Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Carcinoembryonic Antigen ; blood ; Carcinoma, Non-Small-Cell Lung ; blood ; drug therapy ; pathology ; radiotherapy ; surgery ; Combined Modality Therapy ; Female ; Follow-Up Studies ; Humans ; Karnofsky Performance Status ; Lung Neoplasms ; blood ; drug therapy ; pathology ; radiotherapy ; surgery ; Male ; Neoplasm Staging ; Pneumonectomy ; methods ; Proportional Hazards Models ; Retrospective Studies ; Survival Rate ; Young Adult

Objective Overexpressions of epidermal growth factor(EGF)and EGF receptor have been associ- ated with progression and invasive phenotype of pancreatic cancer.However,the underlying molecular mechanism by which EGF worked in pancreatic cancer cells has not been completely understood.In this study,effect of EGF on the invasion and metastasis of pancreatic cancer cells and its regulatory mechanism were investigated.Methods The effects of EGF on the proliferation,adhesion and invasion of pancreatic cancer cells were detected by WST-1 prolif- eration assay,adhesion assay and invasive assay,respectively.The activity and expression of MMP-2 and MMP-9 were examined by zymography,Western blot and RT-PCR,respectively.The activity of NF-?B was examined by EMSA.Results EGF could significantly promote the invasiveness of pancreatic cancer cells but did not affect cell proliferation or adhesion.The expressions of NF-?B and MMP-9 were significantly increased by EGF,but EGF did not affect the activity and expression of MMP-2.Furthermore,EGF stimulated the NF-?B binding activity.Pre- treatment with NF-?B inhibitors,pyrrolidine dithiocarbamate(PDTC),could significantly inhibit the activity of NF-?B induced by EGF.Meanwhile,the EGF-induced expression and activity of MMP-9,as well as cell invasiveness were also inhibited by NF-?B inhibitor.Conclusion EGF could increase the expression and promote the invasiveness of MMP-9 via the activation of NF-?B in pancreatic cancer cells,which implies that NF-?B inhibitant,such as PDTC,may diminish the invasiveness of pancreatic cancer cells.