A new method for the determination of peptide antibiotics in sediment from aquaculture environment by high performance liquid chromatography-tandem mass spectrometry was developed. The target analytes in sediments were ultrasonically extracted twice with citrate buffer solution and methol mixture (3∶ 4, V/ V), followed by complexation with 0. 5 g of Na2 EDTA, purification with 5 mL of methyl isobutyl ketone, and clean-up with HLB-SPE column. The analytes were separated on a MGII C18 column by gradient elution with 0. 1% formaic acid-0. 1% formaic acid acetonitrile as mobile phase, detected in multiple reaction monitoring (MRM) with electrospray ionization (ESI) under positive ion mode, and quantified by external standard method. The calibration curves were linear (R2 >0. 999) over a concentration range of 10 -10000μg / L for colistin and bacitracin and 4-4000 μg / L for virginiamycin M1 . The limits of detection (S / N = 3) were 5 μg / kg for colistin and bacitracin and 2 μg / kg for virginiamycin M1 . The limits of quantification (S / N=10) was 10 μg / kg for colistin and bacitracin and 4 μg / kg for virginiamycin M1 . At three spiked levels, the recoveries ranged from 79. 7% to 91. 6% (RSD=1. 9% -10. 8% ), showing high sensitivity, good reproducibility and wide applicability.

BACKGROUND: Nowadays, it is thought that transforming growth factorβ (TGFβ) is closely related with cicatrization. TGFβ that is a key active molecule can affect each phase of cicatrization. Theoretically, to inhibit the biological effect of TGF β can reduce cicatrization.OBJECTIVE: To explore the inhibitive effect of antisense TGF β1 deoxy-oligonucleotide on generation of cicatricle in intention of animal models with hyperplastic scars and observe the effective route of administration of using antisense TGF β1.DESIGN: Own control and animal study.SETTING: Department of Plastic Surgery, Anning Hospital of General Hospital, Lanzhou Military Area Command of Chinese PLAMATERIALS: The experiment was performed at the laboratory of anatomy,Lanzhou Medical College from September 2002 to July 2003. Totally 20flap-eared Japanese rabbits were selected.METHODS: Blood vessels could be seen in ventral surface of each rabbits' ear getting out of the way along long axis to establish two 1.0 cm×2.5 cm oblong full-thickness cutaneous deficiency raw surfaces that interval for 1.5 cm, to the surface of cartilage, totally 80, so asto establish ventral surface of rabbits' ear models with hyperplastic scars. After epithelizatio of raw surfaces of rabbits' ear (20 days, averagely), 5μL(1 g/L) antisense TGF β1 deoxy-oligonucleotide was closely injected into local endepidermis of each raw surface of left ear of each rabbit with microinjector, which was regarded as TGF β1 group. 5 μL saline was injected into each raw surface of right ears, which was regarded as saline control group. After injection for3, 7, 11, 20, 30 days, cicatricial tissues were cut, 4 rabbits in each time phase. Hematoxylin-esoin (HE) staining, Masson staining and TGFβ1 mRNA, type Ⅰ and Ⅲ collagen mRNA in situ hybridization histochemistry staining were applied.MAIN OUTCOME MEASURES: Results of HE staining, Masson staining and in situ hybridization histochemistry staining.RESUTLS: A total of 20 animals were included in the result analysis. ①HE staining showed that inflammatory cell infiltration and significant infiltrative zone of leukocytes occurred in hyperplastic scars of right ears in each group. There was inflammatory cell infiltration, but no infiltrative zone of leukocytes in hyperplastic scars of left ears after intervention with antisense TGF β1. ②Masson staining suggested that collagen fibers with deep blue-stain occurred in hyperplastic scars of right ears from the 3rd week after injury, till the 7th week there still was blue-stain collagen fibers,which was bulky (width of about 8-10 μm) and arranged in a great mess.The blue-stain collagenous fibers also appeared in hyperplastic scars of left ears at the 3rd week after injury by the intervention of antisense TGF β1,but till the 6th and 7th weeks the blue-stain became light and thin (width of about 3-5 μm), arranged in order. ③In situ hybridization revealed that expressive rates of TGF β1 mRNA, type Ⅰ collagen mRNA, type Ⅲ collagen mRNA positive cells decreased obviously.CONCLUSION: Antisense TGF β1 can inhibit the proliferation of hyperplastic scars of rabbits' ears and lighten markedly the fibrosis of cicatricial tissue. The local injection with naked DNA is feasible in the treatment of cicatricle.

Chinese herbal medicine (CHM) has been widely used in the treatment of Sjogren's syndrome. However, there remains no systematic review to assess the effectiveness and safety of CHM.

Blood-Brain Barrier ; physiopathology ; Brain Injuries ; physiopathology ; Humans ; Infant ; Infant, Newborn ; Infant, Premature ; Inflammation ; complications ; Oxygen ; metabolism

The study is to describe the main activities of NGOs involved in programs of China AIDS Global Fund Round 5 and analyze the advantage and necessity of their involvement in HIV/AIDS control. The experience and problems of NGOs ' involvement in AIDS Global Fund Programs,as well as appropriate approaches to address them are discussed.

Objective To investigate the efficacy and safety of different strategy of antithrombotic therapy in elderly patients with atrial fibrillation (AF) and coronary disease.Methods 224 inpatients and outpatients with AF and coronary disease whose mean follow-up time was 2 years,were divided into warfarin group,warfarin combined with antiplatelet drug(aspirin or clopidogrel) group,antiplatelet drug(aspirin or clopidogrel) group and control group.The thromboembolic event rate and adverse events incidence were observed in different groups.Results The risk of thromboembolic events,particular emerging risk of cerebral infarction in the control group(12.50 ％) was significantly higher than other groups (P＜ 0.05).Thrombotic event rates in warfarin + single joint group(2.78％) was lower than other groups(warfarin group 4.29 ％,single joint group 5.81％),but there was no significant statistical difference.The overall risk of bleeding in the control group (3.13 ％) was significantly lower than other antithrombotic group (P＜0.05).The incidence of skin bruising in single joint group was lower than other antithrombotic groups,the overall bleeding risk,especially gasfrointestinal bleeding in warfarin+ single joint group was significantly higher than other groups (P＜ 0.05).Conclusion Elderly patients with coronary heart disease and atrial fibrillation need antithrombotic therapy to prevent thrombotic events.Using warfarin alone or warfarin combined antiplatelet drug does not lead to serious bleeding events,but generally bleeding risk should be attracted more attention.

Objective To correlate vWF expression in the endothelium of transitional pulmonary arterioles from lung biopsy in patients with pulmonary hypertension (PH) secondary to left-to-right shunt congenital heart defects (CHD). The results will be compared to vWF expression in peripheral venous plasma pre-operatively and the early post-operative outcome. Methods Consecutive 70 cases of left-to-right shunt congenital heart defects were involved in the study, the age ranged from 4 months to 63 years. Pulmonary systolic pressure/systemic systolic pressure (Pp/Ps) was calculated from Swan-Ganz floating catheter monitoring before corrective operation. PH was found in 62 cases, with slight PH in 16, moderated PH in 24 and severe PH in 22. Non-PH in 8 cases. Twenty-six cases of non-heart and lung disease were involved in as control. Lung biopsy tissue was stained for routine pathologic classification and quantitative vWF expression, with testing vWF in the peripheral venous blood. Post-operative complication was noted. Results There was a statistically difference of vWF expression in the endothelium of pulmonary transitional arterioles between PH group and non-PH group, with reducing intensity in order of non-PH, slight Ph, moderate PH and severe PH. A negative relationship was statistically noted between Pp/Ps and vWF expression in the arteriole endothelium (=61.88-33.30x, r=-0.701, P

The Logminer utility has been provided by the latest Oracle 8i version.It can analyze archived log files and online log files.This paper introduces how to install and use this utility,especially how to make the use of the auditing function on key users and key data tables,as well as recover the hostility operation without the shutdown of database.

Objective To investigate the expressions of matrix metalloproteinase 2 (MMP 2), matrix metalloproteinase 7 (MMP 7), and tissue inhibitor of matalloproteinase 2 (TIMP 2) in lung carcinoma tissue and their significance Methods The expressions of MMP 2, MMP 7, and TIMP 2 in 74 cases of lung carcinoma tissues and 20 cases of peri cancerous normal lung tissues were detected by immunohistochemical method, and the correlation between the expressions of these proteins and the clinicopathological parameters and the prognosis was analyzed Results MMP 2 and MMP 7 expressions in lung carcinoma tissues were significantly higher than those in peri cancerous normal lung tissues ( P 0 05), and the expression of TIMP 2 was significantly lower in lung carcinomas with lymph node metastasis than that in lung carcinomas without lymph node metastasis ( P

Objective:To observe the clinical efficacy of Jianpiqinghua Particles and Wentong Powder on early stage of diabetic feet adding to basal treatment,and to establish a standardized clinical diabetic foot prevention program of integrated traditional Chinese medicine.Methods:Take a randomized blind placebo-controlled add-on trial:The treatment group of 20 was given with Jianpiqinghua Particle(oral),Wentong Powder(foot washing),the control group of 20 was given placebo by same methods.The course in both groups was16 weeks.The change of total effect body and foot feeling(VAS scale),electro-neurophysiological examination and ankle/brachial ratio were evaluated.Results:The TCM group was superior to the control group in improving the body and feet clinical symptoms,nerve conduction velocity,evoked potential amplitude and the ABI index(P