With the development of society and medical science,the medical arena should develop with the times,transform medical ethics idea, construct new medical ethics view to unceasingly promote the medical ethics progress and the comprehensive,coordinated, and sustainable development of medical industry.This article discussed the principle,significance and several related problems of new medical ethics view in order to make direct instruction for the constnuction of new medical ethics view.

Vascular vertigo is a common vertigo.Vertebral artery dominance is a vascular phenomenon,and its mechanism remains unclear.It causes basilar artery changes and hemodynamic changes in posterior circulation.Vertebral artery dominance may trigger vascular vertigo through a variety of mechanisms.

BACKGROUND:With the development of the research, induced pluripotent stem cel s are applied to the build of disease model, drug screening, regenerative medicine, and many other research fields, and have made significant achievements, especial y in the study of nervous system diseases.
OBJECTIVE:To summarize the recent development of induced pluripotent stem cel s and to raise problems and prospects based on the latest research in this field.
METHODS:The first author searched the PubMed database for articles about the induced pluripotent stem cel s, including reviews, clinical research and basic research, published from January 2006 to September 2014. The keywords were“iPS, induced pluripotent stem cel”, and final y 60 articles were included in result analysis.
RESULTS AND CONCLUSION:Induced pluripotent stem cel research continues to make breakthrough from its discovery by Yamanaka’s team in 2006 to winning Nobel Prize in 2012. Induced pluripotent stem cel research has broad prospects in the disease model construction, drug screening and regenerative medicine. Currently, problems such as reprogramming methods, cel stability, and clinical transformation stil need to be solved, and further researches are necessary.

Basilar artery hypoplasia (BAH) has been paid less attention to in the past.However,the increased detection rate makes the clinical significance of BAH to be gradually recognized.BAH have interaction with vascular risk factors,and this may promote the occurrence of ischemic events in posterior circulation.Brain evoked potential can be used as an important means for early detection of this pathophysiological events.The depth study of pathological significance of BAH helps to deepen the understanding of the mechanisms of posterior circulation ischemic events.

Recent studies have demonstrated that hyperhomocysteinemia is an independent risk factor for stroke,which may cause vascular endothelial injury by multiple mechanisms,destroy blood coagulation and fibrinolytic systems,and influence on lipid metabolism.Methylenetetra hydrofolate reductase(MTHFR)is a key enzyme of homocysteine metabolic pathway in the human body.If it is insufficient or its activity decreases,it will directly result in the accumula tion of homocysteine in the human body,and callse hyperhomocysteinemia.Although a number of studies have found that MTHFR gene mutation is the main cause of MTHFR insufficient and its activity decrease,the correlation between MTHFR gene mutation and ischemic cerebral vascular disease is quite controversial now.This article reviews the relationship between MTHFR gene polymorphisms and ischemic stroke.

The effects of advanced glycation end-products (AGEs) on number and activity of vascular endothelial cells (VEC) from hone marrow stem cells (BMSC) of mice were investigated. 100 μ/ml AGEs markedly inhibited differentiation of BMSC into VEC with decreased vascular endothelial growth factor receptor-2 positive cells, hut 20 μg/ml AGEs had no effect.

A prospective study was performed to evaluate the diagnostic value of B- mode ultrasonography and inferior vena cavograme and the value of PTA in Budd-Chiari syndrome.One hundred sixty-eight cases including ninety-two men and seventy-six women, age ranged 11～63(mean,34.8 years).Among them 65 were treated with PTA or stent placement.The authors gave a minute and detail description of clinical feature,ultrasono- graphy,inferior vena cava or hepatic venogram,CT and other radiologic demonstration of Budd-Chiari syndrome retrospectively.Four types of Budd-Chiari syndrome were demon- strated based on anatomy,B-mode ultrasonography,inferior vena cavogram and hepa- tovenograme.(1)IVC membranous webs(76 subjects,45.2%),(2)IVC segmental stenosis or occlusion(65 subjects,38.7%),(3)hepatic vein occlusion(10 subjects,6. 1%),(4)mixed type(17 subjects,10%).The treatment of the Budd-Chiari syndrome with percutaneous transluminal balloon dilatation and stent placememnt of inferior vena cava or hepatic vein was safe and satisfied.Its long-term effectiveness(follow up 3-5 years)is al- so satisfactory.

Two patients of Budd-Chiari syndrome,suffering from the anemalons drainage of inferior vena cava into left atrium were reported including one male of 41 years old and female of 42. togectll with labial cyanosis,fingers and toes symptoms of portal hypertension and IVC hypertension. The obstruction of IVC wastreated with balloon catheter hypertension and IVC hypertension the disrotreaed also after PTA.The echo wasn't discovered with Dopple ultrasound after PTA.

0 05).Conclusion The distribution frequency of bb type of VDR genotypes in Han populations of China was more prevalent,followed by Bb and bb types in turn.In the patients receiving long term glucocorticoid therapy,there is no significant difference in BMD between Bb and BB genotypes.The data suggest that the VDR genotypes may not be a means to identify patients at great risk of glucocorticoid induced osteoporosis,which await to be further confirmed with a large sample size.

AIM: To isolate and identify flavones from Taxillus chinensis (DC.) Danser, to establish the content determination of quercetin. METHODS: The flavones were isolated and purified by column chromatography on silica gel. Its structures were identified by spectroscopic methods, including IR, UV, MS. HPLC was used to assay the quercetin. RESULTS: quercetin and quercitrin content were determined. CONCLUSION: This method is accurate, reliable with good separability and reproducibility, it can be applied as standard for the control of Taxillus chinensis (DC.) Danser.