To investigate cytotoxic secondary metabolites of Micrococcus sp. R21, an actinomycete isolated from a deep-sea sediment (-6 310 m; 142 degrees 19. 9' E, 10 degrees 54. 6' N) of the Western Pacific Ocean, column chromatography was introduced over silica gel, ODS, and Sephadex LH-20. As a result, eight compounds were obtained. By mainly detailed analysis of the NMR data, their structures were elucidated as cyclo(4-hydroxy-L-Pro-L-leu) (1), cyclo(L-Pro-L-Gly) (2), cyclo( L-Pro-L-Ala) (3), cyclo( D-Pro-L-Leu) (4), N-β-acetyltryptamine (5), 2-hydroxybenzoic acid (6), and phenylacetic acid (7). Compound 1 exhibited weak cytotoxic activity against RAW264. 7 cells with IC50 value of 9.1 μmol x L(-1).
Animals ; Biological Factors ; chemistry ; isolation & purification ; metabolism ; pharmacology ; Cell Survival ; drug effects ; Macrophages ; cytology ; drug effects ; Magnetic Resonance Spectroscopy ; Mass Spectrometry ; Mice ; Micrococcus ; chemistry ; genetics ; isolation & purification ; metabolism ; Molecular Structure ; Phylogeny ; RAW 264.7 Cells ; Seawater ; microbiology ; Secondary Metabolism

OBJECTIVETo explore optimal choice of surgical treatment and operative approach for closed complex tibial plateau fractures and its influencing factors.

METHODSFrom January 2003 to January 2011, 95 patients with closed complex tibial plateau fractures were estimated Schatzker V and Vl, and treated with three different surgical methods. The methods included single plate through anterolateral incision (Group A, 22 cases), double plates through inside and outside incisions (Group B, 36 cases), and double plates through antero-midline incisions (Group C, 37 cases). There were 56 males and 39 females, ranged the age from 19 to 57 years (averaged, 36.3 years), 50 cases in left, 45 cases in right. According to Schatzker classification, 51 cases were type V, 44 cases were VI. The data of operation time, intraoperative blood loss, complications (infectious of wound, necrosis, bad incision, collapse fracture, loosen of internal fixation, fracture failure)and recovery of function of lower limb joint were collected.

RESULTSThere were no significant difference among three groups in operation time (P > 0.05); blood loss in group A was obvious better than other groups (P < 0.05); collapse of joint surface and failure rate of internal fixation in group A was higher than other groups (P > 0.05); Merchant score after 1 year were higher in group B, C than group A. For lower limb function, 10 cases got excellent results, 5 good, 4 fair and 3 poor in group A; 21 cases got excellent results, 11 good, 3 fair and 1 poor in group B; 23 cases got excellent results, 11 good,2 fair and 1 poor in group C.

CONCLUSIONThe blood loss in group A was least, but fracture exposure and joint surface was not satisfactory, and stable fixation could not be achieved, the long-term result was not good. For fractures with double condyles and dislocated involved, double plates through inside and outside incisions or double plates through antero-midline incisions was suggested,which benefit good reduction of joint surface, stable fixation, and erlier exercise.

Adult ; Bone Plates ; Case-Control Studies ; Female ; Fracture Fixation ; adverse effects ; methods ; Fractures, Closed ; surgery ; Humans ; Male ; Middle Aged ; Tibial Fractures ; surgery

OBJECTIVETo investigate the species and percentage changes of pathogens in blood cultures from the pediatric hematology ward, and to analyze the drug resistance of main pathogens and the risk factors for positive blood culture (sepsis).

METHODSA retrospective analysis was performed to analyze the species and drug sensitivity of the pathogens isolated from 2358 blood cultures from the pediatric hematology ward of the West China Second University Hospital between 2008 and 2011, as well as the related clinical data.

RESULTSA total of 110 strains of pathogens were isolated, with Escherichia coli (16 strains), Pseudomonas aeruginosa (12 strains) and Staphylococcus epidermidis (8 strains) being the most common ones. From 2008 to 2011, the percentage of Gram-positive bacteria decreased, while the percentage of Gram-negative bacteria increased. The detection rates of methicillin-resistant coagulase-negative Staphylococci and methicillin-resistant Staphylococcus aureus were 69% and 43% respectively, but both were sensitive to vancomycin. The detection rates of extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli and ESBL-producing Klebsiella pneumoniae were 69% and 62% respectively, but both were sensitive to imipenem and meropenem. Malignant tumor was a risk factor for positive blood culture (OR=3.564, P<0.05).

CONCLUSIONSA wide range of pathogens are responsible for bloodstream infection in the pediatric hematology ward and the percentages of bacteria are changing; these pathogens have a high drug resistance rate. Malignant tumor is a risk factor for positive blood culture in the pediatric hematology ward.

Adolescent ; Bacteremia ; etiology ; microbiology ; Bacteria ; drug effects ; isolation & purification ; Child ; Child, Preschool ; Drug Resistance, Bacterial ; Female ; Humans ; Infant ; Infant, Newborn ; Male ; Retrospective Studies

OBJECTIVETo investigate the correlations among persistent viral infection, heart function and Chinese medicine (CM) difined-syndromes in patients with dilated cardiomyopathy (DCM).

METHODSFifty patients with DCM in the First Affiliated Hospital of Zhejiang Chinese Medical University from October 2009 to December 2011 were selected as the research subjects, and 30 healthy people were simultaneously selected as the normal control group to detect persistent viral infections after admission. The CM syndrome type and grade of heart function were then evaluated. The expression level of Coxsackie adenovirus receptor (CAR) was detected using the flow cytometry (FCM) technique, coxsackie virus RNA (CVB-RNA) using reverse transcription polymerase chain reaction (RTPCR), and the plasma brain natriuretic peptide (BNP) level with a Triage meter plus diagnosis instrument. Finally, the parameters such as left ventricular end diastolic diameter (LVEDd) and left ventricular ejection fraction (LVEF) were measured by ultrasonic cardiogram. Person correlation analysis was used for measured data, Spearman correlation analysis for rating data, and the Chi-square test for numerical data.

RESULTSCVB-RNA was positive in 22 patients (44%) with DCM, while only 6 cases (20%) were CVB-RNA-positive in the normal control group, with a significant difference between the two groups (P<0.01). The expression level of CAR was significantly elevated in the DCM group compared with the normal control group (P<0.01). In CVB-RNA-positive patients (22 cases), the expression level of CAR was significantly higher than in CVB-RNA-negative patients (28 cases; P<0.01). In the DCM patients, there was a positive correlation between the CAR expression and the BNP level (r=0.34, P<0.05), while no significant difference was found between the CAR expression and the LVEF and LVEDd (r=-0.32, 0.30, P>0.05). There was no clear correlation between virus infection and the CM syndrome types in DCM patients (r=-0.22, P>0.05). According to the sequence of syndrome types: phlegm → qi deficiency → blood stasis → hydroretention with asthenic yang (from low to high), a positive correlation was existed between the BNP levels and CM syndrome types (r=0.139, P<0.05).

CONCLUSIONThe expression of CAR on the surface of white cells could be used to detect persistent viral infection. The expression level of CAR and heart function in DCM patients were highly correlated. The expression level of BNP may serve as an objective index for differentiating CM syndromes for patients with DCM.

Adult ; Aged ; Cardiomyopathy, Dilated ; blood ; complications ; physiopathology ; virology ; Coxsackie and Adenovirus Receptor-Like Membrane Protein ; Coxsackievirus Infections ; blood ; complications ; physiopathology ; Female ; Heart Function Tests ; Humans ; Male ; Medicine, Chinese Traditional ; Middle Aged ; Natriuretic Peptide, Brain ; blood ; RNA, Viral ; blood ; Syndrome

AIMTo study the antitumor effects of an immunoconjugate composed of lidamycin (LDM) and monoclonal antibody 3G11 (3G11-LDM conjugate).

METHODS3G11-LDM conjugate was prepared by using 2-iminothiolane (2-IT) and m-maleimidobenzoyl-N-hydroxy-succimide ester (MBS) as crosslinkers. The molecular weight of the conjugate was measured on non-reduced SDS-PAGE gel. Immunoreactivity of 3G11-LDM conjugate to type IV collagenase or to hepatoma 22 cells was determined by ELISA. The cytotoxicity of the immunoconjugate to hepatoma 22 cells was examined by MTT assay. Antitumor effects of the 3G11-LDM conjugate in vivo were evaluated using subcutaneously transplanted hepatoma 22 tumor model in mice.

RESULTSThe molecular weight of 3G11-LDM conjugate was approximately 160 kDa. 3G11-LDM conjugate retained part of the immunoreactivity of 3G11 to type IV collagenase and hepatoma 22 cells. As compared with free LDM, 3G11-LDM conjugate showed stronger cytotoxicity to hepatoma 22 cells. When administered intravenously (i.v. x 2 on day 1 and 8), 3G11-LDM conjugate, at doses of 0.05 and 0.10 mg.kg-1, inhibited the growth of hepatoma 22 in mice by 87.8% and 97.2% on day 11, respectively, whereas the unconjugated LDM at 0.05 mg.kg-1 inhibited tumor growth by 67.1%. The median survival times for tumor-bearing mice of untreated control, LDM at 0.05 mg.kg-1, 3G11-LDM at 0.05 mg.kg-1, and 3G11-LDM at 0.10 mg.kg-1 were 34, 41.5, 60.5 and 94 d, respectively. Evidently 3G11-LDM was more effective than free LDM in suppressing tumor growth and prolonging the life span of tumor-bearing mice.

CONCLUSION3G11-LDM conjugate shows much stronger antitumor effects than equivalent dose of free LDM and may have promising therapeutic potential in cancer treatment.

Aminoglycosides ; administration & dosage ; therapeutic use ; Animals ; Antibiotics, Antineoplastic ; administration & dosage ; therapeutic use ; Antibodies, Monoclonal ; immunology ; Cell Division ; drug effects ; Disease Models, Animal ; Enediynes ; Female ; Immunoconjugates ; therapeutic use ; Liver Neoplasms, Experimental ; drug therapy ; pathology ; Matrix Metalloproteinase 2 ; immunology ; Matrix Metalloproteinase 9 ; immunology ; Mice ; Neoplasm Transplantation ; Random Allocation ; Tumor Cells, Cultured

Objective To learn the prevalence of overweight and obesity among city residents in Wenzhou city.Methods Byusing multistage stratified cluster sampling method,a total of 10 449 residents aged 18 years and above were selected forquestionnaires interview,physical examination and laboratory testing ,analyzed the prevalence and risk factors of overweightand obesity among city residents.Results The crude prevalence rates of overweight and obesity were 32.60% and7.70%,and the age -adjusted rate were 27.50% and 6.51%.The multivariate logistic regression analysis showed that age(OR =1.01,95%CI:1.01 -1.02)and drinking (OR =1.14,95%CI:1.02 -1.27)were risk factors of overweight andobesity,while high degree of education(OR =0.87,95%CI:0.84 -0.91)and active physical exercise (OR =0.75,95%CI:0.57 -0.98)were protective factors of overweight and obesity.The prevalence rates of hypertension,diabetes,dyslipidemia and hyperuricemia were much higher among adults with overweight and obesity,compared with that of normalweight adults (P <0.01).Conclusion Prevalence of overweight and obesity is high in Wenzhou City.Intervention shouldbe actively carried out for the prevention and control of overweight and obesity.

AIMTo investigate the spatial and temporal expression of germ cell nuclear factor (GCNF) in mouse and rat epididymis during postnatal period.

METHODSThe epididymal sections from different postnatal days were stained for GCNF by the indirect immunofluorescence technique and digital photographs were taken by a Carl Zeiss confocal microscope.

RESULTSGCNF was first detected on day 12 in mouse epididymis and day 14 in rat epididymis. The highest expression of GCNF was observed on day 35 in both mouse and rat epididymis. In adults, GCNF exhibited a region-specific expression pattern, i.e., it was expressed predominantly in the initial segment, caput and proximal corpus of rat epididymis and was abundant in the proximal corpus of mouse epididymis. GCNF could be found in the nuclei of the principal, apical, narrow, clear and halo cells.

CONCLUSIONGCNF may play an important role in epididymal differentiation and development and in sperm maturation.

Aging ; Animals ; DNA-Binding Proteins ; analysis ; Epididymis ; chemistry ; growth & development ; Fluorescent Antibody Technique, Indirect ; Male ; Mice ; Mice, Inbred BALB C ; Microscopy, Confocal ; Nuclear Receptor Subfamily 6, Group A, Member 1 ; Rats ; Rats, Sprague-Dawley ; Receptors, Cytoplasmic and Nuclear ; analysis ; Tissue Distribution

OBJECTIVETo compare the sensitivity and practicability of modified Bethesda assay and Nijmegen assay in detecting factor VIII (FVIII) inhibitor.

METHODSModified Bethesda assay and Nijmegen assay were used to screen FVIII inhibitors in 237 patients with hemophilia A. The buffer plus universal coagulation reference plasma (UCRP) was used to establish a standard curve for FVIII: C assay in modified Bethesda method, instead of Nijmegen plasma plus FVIII deficiency plasma in Nijmegen method. The cutoff value for positive FVIII inhibitors is > or = 0.6 BU/ml.

RESULTSThe positive rate of FVIII inhibitors was 5.5% (n = 13) when using modified Bethesda assay and was 8.4% (n = 20) when using Nijmegen assay (P > 0.05).

CONCLUSIONModified standard Bethesda assay is a convenient and feasible method for detecting FVIII inhibitors.

Adolescent ; Adult ; Autoantibodies ; blood ; Blood Coagulation Tests ; methods ; Child ; Child, Preschool ; Factor VIII ; immunology ; Female ; Hemophilia A ; blood ; immunology ; Humans ; Male ; Middle Aged ; Sensitivity and Specificity ; Young Adult

OBJECTIVETo investigate the expression of RhoA and NF-κB in gastric carcinoma and their correlation with clinicopathological fearures. To determine the effective prognostic factors of long-term suivival of gastric carcinoma patients.

METHODSThe role of RhoA and NF-κB in gastric carcinoma was assessed by tissue array technology and the levels of RhoA and NF-κB expression in paraffin-embedded tissues was quantified by immunohistochemistry from 189 cases of gastric carcinoma, 54 cases of their adjacent tissues, and 32 cases of normal gastric mucosa. The prognosis of gastric carcinoma was evaluated by Kaplan-Meier survival analysis and Cox multivariate regression analysis.

RESULTSThe positive rates of RhoA expression were 84.7%, 68.5% and 65.6% in gastric carcinoma, adjacent tissues and normal mucosa, respectively. The expression of RhoA in gasric carcinoma was significantly higher than that in adjacent tissues and normal mucosa (P < 0.05). The positive rates of NF-κB expression were 75.1%, 42.6% and 15.6%% in gastric carcinoma, adjacent tissues and normal mucosa, respectively. The expression of NF-κB in gasric carcinoma was significantly higher than that in adjacent tissues and normal mucosa (P < 0.05). RhoA was positively linked with NF-κB (r = 0.203, P = 0.005). In gastric carcinoma, the expression of RhoA was related with depth of invasion (P < 0.05), and the expression of NF-κB was related with depth of invasion and lymph node metastasis (P < 0.05). The Kaplan-Meier survival analysis showed that the tumor size, lymph node metastasis, depth of invasion, expression of RhoA and NF-κB can shorten the cumulative survival rate. With these paramaters entering the Cox multivariate regression analysis mode, it was revealed that expression of NF-κB, lymph node metastasis and depth of invasion are independent prognostic factors.

CONCLUSIONSThe overexpression of RhoA and NF-κB is involved in the occurrence and development of gastric carcinoma. RhoA is positively linked with NF-κB. They are correlated with the invasion and metastasis of gastric carcinoma. The expression of NF-κB, lymph node metastasis, depth of invasion are independent prognostic factors playing an important role in prediction of the clinical outcome after radical resection of gastric carcinoma.

Adult ; Aged ; Carcinoma ; metabolism ; pathology ; Female ; Follow-Up Studies ; Gastric Mucosa ; metabolism ; Humans ; Lymphatic Metastasis ; Male ; Middle Aged ; NF-kappa B ; metabolism ; Neoplasm Invasiveness ; Proportional Hazards Models ; Stomach Neoplasms ; metabolism ; pathology ; Survival Rate ; rhoA GTP-Binding Protein ; metabolism