Biosurfactant is a high surface active agent synthesized by microorganism Compared with chemical surfactant, biosurfactant has a low toxicity to ecological system of Earth So biosurfactant is gradually applied to many aspects of environmental pollution control A review is made from several aspects: screening of biosurfactant producing microorganism, optimization of culture brooth, isolation of biosurfactant et al In addition, on the foundation of the analysis, several suggestions about the development of biosurfactant are proposed in the end

Objective To establish a neonatal transport network in order to improve the diagnosis and treatment levels of the basic medical unit and to decrease medical disputes and fatality rate of the new born Methods The first neonatal transport network in the Southwest of China, covering Chongqing and the adjacent areas, was established During the process of transport, warm keeping, unobstructed respiratory tracts, oxygen treatment, establishment of venous passage and placement of gastric canal were included Meanwhile, the vital signs, colors of the skin and mucosa and consciousness should be closely observed Corresponding measures could be taken at any time when needed Results Satisfactory results were achieved by means of the neonatal transport network Conclusion The neonatal transport network can play a very important role in strengthening the treatment of the newborn, decreasing the fatality rate and sequela and improving the diagnosis and treatment levels of the basic medical unit

Pig copper zinc superoxide dismutase (CuZnSOD) is an important antioxidant enzyme. Some studies focused on the function of CuZnSOD gene, but the transcriptional regulation of the CuZnSOD gene is not yet fully elucidated. Therefore, the aims of the study were to determine the core promoter region and to explore its mechanism of transcriptional regulation. The 853 bp DNA sequence of 5'-flanking promoter was amplified by performing PCR. A series of CuZnSOD promoter fragments with gradually truncated 5'-end were produced by nested PCR and inserted into pGL3-Basic vector. The activities of the promoters were measured by the dual-luciferase assay system after transient transfection into the NIH/3T3 cells. The results demonstrated that there were 2 potential transcription start sites in the regions from initiation codon to -87 bp and -266 bp, respectively. The region from -383 bp to +67 bp in CuZnSOD gene promoter showed higher activity than other regions, and further deletion analysis demonstrated that the region from -75 bp to -32 bp contained an essential promoter sequence for pig CuZnSOD gene transcription. In addition, several potential transcription factor binding sites were predicted with bioinformatics method. These results suggest that these transcription factor binding sites may be involved in the transcriptional regulation of CuZnSOD gene.
Animals ; Cloning, Molecular ; Gene Expression Regulation ; Genetic Vectors ; Mice ; NIH 3T3 Cells ; Promoter Regions, Genetic ; Superoxide Dismutase ; genetics ; Swine ; Transfection

The effects of surfactants on the production of cellulase by Trichoderma viride in liquid substrate fermentation process were investigated. Straw was used as the sole carbon source and the surfactants were biosurfactant rhamnolipid from Pseudomonas aeruginosa and Tween 80. The changes of FPA,CMCase,Avicelase and surface tension with time were analyzed under different concentrations of the two surfactants. The results showed that the surfactants can enhance the enzyme activity of Trichoderma viride. The FPA,CMCase,Avicelase were promoted 1.08,1.6 and 1.03 times higher than the controls by rhamnolipid. The enhancement of the enzyme activity by rhamnolipid was much higher than that of Tween 80. At the same time,rhamnolipid was not degraded prior to other substrate.

Objectives To search for the pathogenesis of vaseular endothelial injury and its clinical significance.Methods 36 patients with acute lower respiratory trect infection(ALRI)and 30 healthy controls were envolved. Circulating endothelial cells (CEC)and nitric oxide (NO) levels were tested.Results Circulating nitrite/nitra levels,the stable metabolic products of NO,were found to be significantly higher in the patients with ALRI (44.6?22.6umol/L) than that in the controls (24.5?14.1umoI /L, P

Objective The aim of this study was to investigate the relationship between phosphotyrosine interac-tion domain containing 1 ( PID1 ) gene and variation in intramuscular fat ( IMF ) content and the possibility to generate transgenic animals by testicular injection .Methods Expression vector pIRES2-acGFP-PID1 carrying pig PID1 gene was incubated with transfection reagents and injected into the testes of male New Zealand rabbits .We examined the F1 genera-tion by fluorescence detection , PCR, Western blotting and measuring the IMF content .The F1 generation gave birth to the F2 generation.Then we examined the F2 generation through detecting the positive rate and the IMF content .Results The exogenous PID1 gene and fluorescent protein gene were expressed at different levels both in the F 1 generation and the F2 generation, and the positive rates were 35.88%and 34.33%, respectively.The IMF content was significantly elevated (P<0.05) in the transgenic positive individuals compared with the negative ones and the control group , and the PID1 protein expression was similarly higher .Conclusions The results of this study demonstrate that PID 1 gene affects intramuscular fat content significantly .Moreover, the results of our analysis provide further evidence that transgenic animals can be gener -ated by testicular injection , and the exogenous gene can be inherited steadily .

OBJECTIVETo explore the operation methods and clinical effects of transfer of the medial half of the coracoacromial ligament to reconstruct the coracoclavicular ligament in treating complete acromioclavicular joint dislocation.

METHODSFrom January 2006 to June 2012,26 patients with acute complete acromioclavicular joint dislocation underwent surgery. Transfer of the medial half of the coracoacromial ligament to reconstruct the coracoclavicular ligament, additional clavical hoot plate and Kirschner wires fixation, were performed in all the patients. Among the patients, 18 patients were male and 8 patients were female, with an average age of 36.7 years old (ranged from 25 to 51 years). The duration from injury to operation was from 3 to 12 days with an average of 5 days. According to the Rockwood classification, 4 cases were grade III and 22 cases were grade V . Clinical manifestation included local swelling, tenderness with snapping, limitation of shoulder joint motion. In preoperative bilateral shoulder joint X-rays, the injured coracoclavicular distance was (16.2 ± 5.0) mm which was significantly wider than that of uninjured sides (7.6 ± 1.0) mm. Clinical results were evaluated according to X-rays and Constant-Murley score.

RESULTSAll incisions obtained primary healing after operation without complication of infection, internal fixation breakage, redislocation. All the patients were followed up from 12 to 30 months with an average of 18 months. Kirschner wires and internal fixation plate were removed at 1 month and 8-10 months after operation, respectively. At final follow-up, the motion of shoulder joint recovered to normal and a no pain joint was obtained. According to Constant-Murley score, 24 cases got excellent results and 2 cases good. There was no significant difference after operation between the injured coracoclavicular distance and the uninjured contralateral side [(7.7 ± 1.2) mm vs (7.6 ± 1.0) mm), P > 0.05].

CONCLUSIONTransfer of the medial half of the coracoacromial ligament to reconstruct the coracoclavicular ligament, additional fixation using hook plate and Kirschner wires is the effective surgical method in treating complete acute acromioclavicular joint dislocation.

Acromioclavicular Joint ; injuries ; Adult ; Female ; Humans ; Joint Dislocations ; surgery ; Ligaments, Articular ; surgery ; Male ; Middle Aged ; Reconstructive Surgical Procedures ; methods

OBJECTIVETo compare the immunoprofiles of intrahepatic cholangiocarcinoma and metastatic colorectal adenocarcinoma for mucin glycoproteins (including MUC1, MUC2, MUC5AC and MUC6) and cytokeratins (including CK7, CK19 and CK20), and to assess their diagnostic value.

METHODSOne hundred cases of intrahepatic cholangiocarcinoma and 21 cases of metastatic colorectal adenocarcinoma were enrolled into the study. Immunohistochemical study for MUC1, MUC2, MUC5AC, MUC6, CK7, CK19 and CK20 was carried out in all cases by EnVision method.

RESULTSIn intrahepatic cholangiocarcinoma, the expression rates of MUC1, MUC2, MUC5AC and MUC6 were 61.0%, 2.0%, 22.0% and 8.0% respectively, as compared to 57.1%, 47.6%, 19.0% and 23.8% respectively in metastatic colorectal adenocarcinoma. On the other hand, the expression rates of CK7, CK19 and CK20 in intrahepatic cholangiocarcinoma were 73.0%, 53.0% and 15.0% respectively, in contrast to 14.3%, 90.5% and 85.7% respectively in metastatic colorectal adenocarcinoma. The difference in expressions of MUC2, MUC6, CK7 and CK20 carried statistical significance.

CONCLUSIONSThe immunoprofile for mucin glycoproteins and cytokeratins provides important clues in distinguishing between intrahepatic cholangiocarcinoma and metastatic colorectal adenocarcinoma to liver. The immunophenotype of MUC2-/MUC6-/CK7+/CK20- indicates the diagnosis of intrahepatic cholangiocarcinoma, while MUC2+/MUC6+/CK7-/CK20+ suggests the possibility of metastatic colorectal adenocarcinoma.

Adenocarcinoma ; metabolism ; pathology ; Aged ; Bile Duct Neoplasms ; genetics ; metabolism ; pathology ; Bile Ducts, Intrahepatic ; pathology ; Biomarkers, Tumor ; analysis ; Cholangiocarcinoma ; genetics ; metabolism ; pathology ; Colorectal Neoplasms ; metabolism ; pathology ; Female ; Glycoproteins ; metabolism ; Humans ; Keratins ; metabolism ; Male ; Middle Aged ; Mucins ; metabolism ; Neoplasm Staging ; classification

Objective To determine a suitable standard of hirsutism for Chinese polycystic ovary syndrome(PCOS)patients living in Shandong region.Methods A total of 623 unbiased women from the general population in Jinan city,131 PCOS patients and 84 controls from outpatients in Shandong region were studied with questionnaires,physical and pelvic ultrasound examination,body hair on 11 sites were evaluated,and 9(lip,chin,arm,thigh,chest,upperbelly,lowerbelly,upperback,lowback)of them which were called hormone Ferriman-Gallwey(F-G)score and 2(forearm,leg)sites of indifferent hormone score were calculated according to the score system described by Ferriman and Gallwey.Results(1)Both body hair F-G score and indifferent hormone score distribution mode in the≤40 years old population were un-normal and both the 95th percentages of score were 2.(2)The hirsutism was significantly higher in PCOS patients[48.1%(63/131)]than in controls[4.8%(4/84)]by F-G score≥2(X~2=47.68,P

OBJECTIVETo study the clinicopathologic features, differential diagnosis and pathogenesis of sclerosing angiomatoid nodular transformation of spleen.

METHODSTen cases of sclerosing angiomatoid nodular transformation of spleen were retrieved from the archival file. Histochemical and immunohistochemical (EnVision method) studies were performed. Ultrastructural findings were also available in one of them.

RESULTSSclerosing angiomatoid nodular transformation was characterized by micronodular appearance of vascular spaces lined by plump endothelial cells with interspersed ovoid spindle cells. Immunohistochemical study showed that the endothelial cells of vessels in the angiomatoid nodules had various expressions of immunologic phenotypes and could be mainly classified into 3 types: CD34(+)/CD31(+)/CD8⁻ endothelial cells of the capillaries, CD8(+)/CD31(+)/CD34⁻ lining cells of the sinusoids and CD31(+)/CD8⁻/CD34⁻ endothelial cells of the small veins. Collagen network and dilated lymphatic sinuses were evident under transmission electron microscope.

CONCLUSIONSSclerosing angiomatoid nodular transformation of spleen is a rare benign entity. It may represent a reactive condition and bears some relationship with splenic angioma. It needs to be distinguished from borderline or malignant vascular tumors of spleen.

Adult ; Antigens, CD34 ; metabolism ; CD8 Antigens ; metabolism ; Diagnosis, Differential ; Female ; Hemangioendothelioma ; metabolism ; pathology ; Hemangiosarcoma ; metabolism ; pathology ; Histiocytoma, Benign Fibrous ; metabolism ; pathology ; surgery ; ultrastructure ; Humans ; Male ; Microscopy, Electron ; Middle Aged ; Platelet Endothelial Cell Adhesion Molecule-1 ; metabolism ; Splenic Neoplasms ; metabolism ; pathology ; surgery ; ultrastructure