Burns ; Periodicals as Topic

Periodicals as Topic

Technical standards were supports that not only for any profession’s development, but also for the basic means of modern quality control.Forensic clinical medicine has developed nearly 40 years in china, there are 23 normative technical documents at present, the range of its application has been expanding with time, the caseload has been more than 1 million pieces per year all the country. Reviewing these standards, it can be seen: Technital standard of forensic clinical medicine has absorbed a large number of advanced international ideas, assimilating plenty of practice experience at the same time, standard's system has been initially formed, it has become one of the important means to guarantee the quality of medicolegal expertise. Certainly, the construction of forensic clinical standardization in China is still an arduous task, there are also many outstanding contradiction in the existing standards, our studies on international standards were not in-depth, and so on. In the future, forensic science experts still need to strengthen the companion study of technical standards and laws or regulations, intensify tracing and evaluating of international standards in order to form more adaptive and advanced technical standards.

The theory of cancer stem cells proposed that recurrence and metastasis of liver cancer are closely related to liver cancer stem cells.The traditional surgical treatment of liver cancer simply kills those rapidly proliferating tunor cells instead of eliminating hepatic cancer stem cells which play decisive role in recurrence and metastasis.As far as people have concerned,there are many signaling pathways and regulatory factors modulating liver cancer stem cells,such as the Wnt/β-catenin pathway,TGF-β pathway,Notch pathway,Hedgehog pathway,hepatitis B virus,as well as epigenetics.Further studies on regulatory mechanisms of liver cancer stem cells are of great significance,in hope of providing new evidence for treatment and prevention of recurrence and metastasis of liver cancer.

Objective To study the expression of inducible nitric oxide synthase (iNOS),endothelial nitric oxide synthase (eNOS) and vascular endothelial growth factor (VEGF) in human gastric cancer and their relationship with tumor angiogenesis and to investigate the interaction of NOS and VEGF in gastric cancer.Methods The expression and distribution of VEGF, iNOS and eNOS in 34 gastric cancer specimens were detected with immunohistochemistry. Microvessel density (MVD) was counted with FⅧRAg immune specific staining.Results The expression rates of iNOS, eNOS and VEGF in 34 gastric cancers were 73.5%, 82.4%and 91.2%respectively. The expression of VEGF had a significant positive relation with iNOS, but not with eNOS. The MVDs of VEGF or iNOS positive gastric cancers were obviously higher than those of VEGF or iNOS negative gastric cancers. There was no significant difference between the MVDs of eNOS positive gastric cancers and eNOS negative ones. Conclusion MVD increases with increase of expression of VEGF and iNOS in gastric cancer. It is indicated that VEGF and iNOS can promote gastric cancer angiogenesis. VEGF and iNOS have a significant positive correlation, which suggests that in human gastric cancer, iNOS plays an important role in the production and action of VEGF.

Autophagy is a degradation process of intracellular composition.It can be divided into four different stages,including initiation,elongation,maturation and autophagosome breakdown.Its role is associated with the degree of cell damage.Moderate activation of autophagy in the case of starvation and hypoxia can promote cell survival; whereas excessive activation during cerebral ischemia can cause cell lysis and promote cell death.Preconditioning may produce ischemic tolerance by appropriate activation of autophagy.Autophagy is strictly regulated by a variety of protein kinases,apoptotic molecules and oxidative stress pathways.

Due accomplishments in the research of medical humanities and social science in higher medical college was failed to achieve due to the problems of improper intellectual structure of the researchers,prejudices toward this discipline,non-mainstream,non-profession and poor research environment.This article brings forward three proposals which may improve the research of medical humanities and social science,namly the establishment of independent discipline,the system of training and practice for researchers and the construction of problem-centered interdisciplinary research platform.

ObjectiveTo investigate the relationship between hepatitis B markers and HBV-DNA content.Methods230 cases with hepatitis were selected.ELISA method was used to detect serum markers,PCR method fordetecting the content of HBV-DNA.ResultsIn 76cases of HBeAg positive specimens,72 cases were HBV-DNA positive,the positive rate was 94.7％ ; in 154 patients with HBeAg negative specimens,72 cases were HBV-DNA posifive,the positive rate was 46.7％.The difference between HBeAg positive group and HBeAg negative group was statistically different( P ＜0.01 ).ConclusionIn patients with chronic hepatitis B,serum markers reflected,HBV can understand the in vivo infection,cannot directly reflect the in vivo replication of HBV.Detection of HBV-DNA content can better reflect the virus replication.

Cerebral vasospasm is a common serious complication after subarachnoid hemorrhage, and is one of the main reasons of morbidity and mortality in patients suffering from subarachnoid hemorrhage. However, However, its pathogenesis has not yet been fully elucidated. Recent studies have suggested that apoptosis plays an important role in the mechanism of cerebral vasospasm. Further study of the apoptotic mechanism of cerebral vasospasm following subarachnoid hemorrhage has important significance for the optimization of therapeutic schemes in clinical conditions.

Protein kinase B (PKB), a serine/threonine kinase Akt, regulates many vital cellular functions, such as cell apoptosis, cell cycle progression and glucose metabolism, etc. Akt/PKB carries out these functions mainly through phosphorylation of a number of cellular substrates. As one of the important substrates of Akt, FOXO transcription factors have attracted more and more attention in regulating cell cycle and apoptosis. FOXO transcription factors are primarily regulated by the phosphatidylinositol 3-kinase/Akt signal pathway via phosphorylation,and re-positioning accompanied by sub-cellular distribution. This article reviews the role of FOXO transcri ption factors in neuronal apoptosis after cerebral ischemia.