BACKGROUND:Umbilical cord blood-derived mesenchymal stem cel s are multipotential stem cel s in the mesoderm in early development stage, and have been paid great attention due to its properties of multi-directional differentiation. OBJECTIVE:To summarize the potential of induced differentiation of umbilical cord blood-derived mesenchymal stem cel s. METHODS:We retrieved PubMed Database for articles concerning the differentiation potential of umbilical cord blood-derived mesenchymal stem cel s published from January 1999 to December 2012. In titles and abstracts, the key words were“umblical cord blood, mesenchymal stem cel s, potential, differentiation”. Total y, 52 articles addressing the differentiation potential of umbilical cord blood-derived mesenchymal stem cel s were reviewed. RESULTS AND CONCLUSION:Numerous studies have confirmed that human umbilical cord blood-derived mesenchymal stem cel s can successful y differentiate into multiple kinds of cel lines, but their understanding remains minor. If we can master the characteristics of the differentiation potential of umbilical cord blood-derived mesenchymal stem cel s, it would be used to repair bone and myocardium detects. Present studies remain in a starting stage. Isolation and purification, regulation of differentiation direction, in vitro amplification and immunogenicity require further investigations.

Objective To assess the accuracy of MRI measurement of hippocampal formation in predicting postoperative cognitive dysfunction (POCD) in elderly patients.Methods Forty-one ASA Ⅱor Ⅲ patients aged≥65 yr undergoing gastrointestinal tract surgery were enrolled in this study.MRI was performed to measure the volume of hippocampal formation before surgery and the results were standardized according to the individual intracranial volume.All patients underwent a battery of neuropsychological tests including sensitive tests on the Wechsler adult memory scale and Wechsler adult intelligence scale,trail making test and the grooved pegboard test.We used the Z score to identify POCD as recommended by Moiler.All patients were then divided into POCD group and non-POCD group according to the results of the neuropsychological tests.The results of the tests were correlated with the volume of hippocampal formation measured by MRI.The value of MPI measurement of hippocampal volume in predicting POCD was analyzed.Results Thirty-six patients completed the whole battery of neuropsychological tests after surgery.Thirteen of the 36 patients were found to have COPD (36%) on the 4th postoperative day.The hippocampal volume was significandy smaller in POCD group (4.75±0.23) than in non-POCD group(5.06±0.31).Hippocampal volume was found to be effective in predicting POCD.The overall accuracy of prediction was 77.8%(28/36 patients) with 92.3% sensitivity (12/13 patients),70.0% specificity (16/23 patients) and 0.623 Youden index.Conclusion The MRI measurement of hippocampal volume is valuable as a predictor of POCD in the elderly.

ObjectiveTo explored the relationship among endothelin-1(ET-1), P-selection and troponin I(CTnI) in acute myocardial infarction (AMI) and unstable angina (UA).MethodsPlasma level of endothelin-1 was analyzed by radioimmunoassay, the expression of P-selection was analyzed by flow cytometery technique and troponin I was analyzed by paramagnetic partile chemiluminescent immunoassay in 23 AMI cases, 21 UA cases and 28 healthy controls.ResultsPlasma levels of ET-1 and CTnI in AMI patients were higher than in controls(P<0.05). The expression of P-selection in AMI patients was higher than in controls (P<0.01).Plasma levels of ET-1 and expression of P-selection in UA patients were higher than in controls (P<0.05). There was an increased trend of CTnI in UA patients in contrast to controls, but without statistical significance(P>0.05).As compared with UA, plasma levels of CTnI and expression of P-selection were elevated in AMI patients (P<0.05). No significant difference was observed between AMI and UA cases in plasma level of ET-1. Multivariate regression analysis revealed that P-selection was significantly associated with AMI and UA cases compared with plasma level of CTnI (r=0.404,P<0.01).ConclusionsPlasma levels of ET-1 and P-selection were sensitive markers as prethrombolic status.

Acyl Coenzyme A Oxidase(ACO) is the rate-limiting enzyme of the ?-oxidation of dicarboxylic acid in Candida tropicalis . Using strains with low Acyl Coenzyme A Oxidase activity to produce dicarboxylic acid on an industrial scale will facilitates the improvement of the yield and purity of dicarboxylic acid. In this research, we improved the method of Allain, so as to determine the activity of Acyl Coenzyme A Oxidase from Candida tropicalis easily and correctly. This method can be used as quantity criterion in the screen of industrial strains of dicarboxylic acid production, and this work established the basic of character study of Acyl Coenzyme A Oxidase. We determined the activities of Acyl Coenzyme A Oxidase from a series of Candida tropicalis strains with different ability of dicarboxylic acid production, and found the obvious relationship of ACO activity and ability of acid production.

Objective To analyze the independent factors affecting the prognosis of gastrointestinal stromal tumor(GIST) patients undergoing radical operation.Methods The clinical characteristics and follow up data of the 97 patients with GIST underwent radical opsration from January,2001 to January,2003 in our hospital were retrospectively analyzed by univariate and multivariate methods.Results In the univariate analysis of the 97 cases,gender,tumor location,tumor size,tumor cell type,necrosis,mitotic count,and Gleevec administration postoperatively were found to be related to the prognosis of GIST.Multivariate Cox model analysis showed that tumor location,tumor size,tumor cell type,necrosis,mitotic count,and Gleevec administration postoperatively were independent prognostic factors for patients with GIST.Conclusions Tumor location,tumor size,tumor cell type,necrosis,mitotic count are important prognostic factors for patients with GIST undergoing radical operation.

0.05,respectively).Conclusions Oxidative stress and inflammatory reaction play an important role in the pathogenesis of PE.Antioxidant and anti-inflammatory treatment may prevent the onset and progress of PE.

Objective To investigate the multidrug-resistant bacteria infection in pediatrics of our hospital and guide the rational usage of antibiotic,Methods The retrospective survey method was adopted to analyze the multidrug-resistant bacteria infection of 591 patients in paediatrics from 2009 to 2011.Results There were no statistical differences of multidrug resistance bacteria infection rates in the three years (x2 =0.028,P =0.986).Among 591 patients,17 patients were with multidrug-resistant bacteria infection,the positive rate was 2.87％,82.4％ origin of society area,64.7％ was respiratory tract infection,58.8％ resistance bacteria including Klebsiella pneumoniae and Escherichia coli,appear multidrug resistance bacteria infection previous all used antibiotic drugs.Conclusion The multidrug resistance bacteria infection is related to occur in paediatrics abuse and unrationaly use of antibiotics.Its should be strengthened to supervise and manage.

Adult ; Haploidy ; Hematopoietic Stem Cell Transplantation ; Hemorrhage ; Humans ; Lung Diseases ; Male ; Pulmonary Alveoli

The pathological changes of the lungs after a single exposure to an atmosphere containing 100?15 ppm of hydrogen sulfide(H2S)for 3 hours were observed with optical and electron microscopy in rats.It was found that bronchial epitheliem,alveolar epithelium,pulmonary vessels and pulmonary interstitium were extensively involved.Pulmonary edema,focal pulmonary hemorrhage,exfoliation of the damaged epithelium,and infiltration of neutrophils occurred mainly in the 3rd hour to the 3rd day after H2S intoxication.Chronic inflammatory response and proliferation of fibrous tissue occurred mainly from the 7th to the 15th day after intoxication.Ultrastruc-turally,there were marked changes of alveolar epithelium,phagocytes,vascular endothelium,fi-broblasts,and inflammatory cells.Initial pulmonary edema emerged in the pulmonary interstitium and gradually affected the alveoli.Fragments of alveolar surfactant could be seen in the 3rd hour to the 3rd day after intoxication.These findings indicate that H2S inhalation exerts extensive injurious effects on the lungs in the rats.

Objective Clinical values of endoscopy and histopathology in differential diagnosis of Crohn's disease(CD) and intestinal tuberculosis were evaluated by characterising the distinctive diagnostic features of CD and intestinal tuberculosis in surgically resected specimens.Methods To review retrospectively the surgical enterocolonic specimens and to compare the clinical,endoscopic and morphologic features of CD or intestinal tuberculosis.Selected histological parameters were evaluated retrospectively in both 30 cases of CD and intestinal tuberculosis.Results The sensitivity,specificity and accuracy of endoscopy in diagnosis of CD and intestinal tuberculosis were 80.0%,25.6% 49.3% and 86.7%,46.2% 63.8% respectively.The histological characteristic parameters of intestinal tuberculosis were confluent granulomas often with caseous necrosis and thinning submucosa;the features of CD were granulomas without caseous necrosis ,submucosal hyperplasia fissure like ulceration and prominent lymphoid aggregates.Some histopathology similarities of CD and intestinal tuberculosis were found,such as chronic non-specific inflammation of intestinal wall,ulceration,collections of epithelioid histocytes,microgranulomas and transmural inflammation.Conclusions Although distinctive diagnostic features of CD and intestinal tuberculosis were found in their clinical,endoscopical and pathological study.The final differential diagnosis depends largely upon pathology.