Guided by good clinical practice ( GCP) , M hospital cooperated with the Ethics Committee in quali-ty management of clinical trials and took the specific measures including perfecting the institution and standard op-erating procedures, implementing three level quality control institution, strengthening the training of GCP, and closely cooperating with drug and data management of clinical trials, quality control in the clinical trial, ethical re-view and supervision, quality control in the whole process (seamless connection). Seamless connection from the beginning of project acceptance and quality control in the whole process of clinical trials can effectively solve the ex-isting problems in clinical trials and improve the quality of clinical trials.

The contents of the individual fractions of glucose oligosaccharides were determined simultaneously by means of reversed-phase HPLC. The sample was dissolved in water and filtered and the filtrate was used directly for the analysis. The sugar was separated on a column of u-Bondapak C18 using water as the mobile phase and determined refractometrically.The method was applicable to the analysis of glucose oligosaccharides from monomeric glucose through polymeric maltooctose. Quantitative results were obtained for glucose, maltose, maltotriose, maltotetrose, maltopentose and maltohexose in the samples prepared in our laboratory. Recovery tests revealed this method reliable.

China is entering into an aging society, and the incidence of hypertension and atherosclerosis were increased year by year. The incidence of transient ischemic attack (TIA) patients with carotid stenosis increased year by year. Carotid artery stenosis or occlusion can cause reduction of local brain tissue perfusion resulting from TIA. CT cerebral perfusion imaging and SPECT could detect earlier the chronic hyper fusion of carotid stenosis TIA, forecast risk coefficient and intervention and prevent the occurrence of cerebral infarction, to evaluate effect of carotid endarterectomy and carotid s carotid artery stenting. It is very important to monitor cerebral hemodynamic changes. The technology has the features of blood infusion situation, advantages, curative effect evaluation and development trend in carotid stenosis TIA reviewed by CT perfusion imaging and SPECT.

Adolescent ; Gene Rearrangement ; Humans ; Leukemia, Myeloid, Acute ; etiology ; genetics ; Male ; Precursor Cell Lymphoblastic Leukemia-Lymphoma ; complications ; genetics ; Receptor, Platelet-Derived Growth Factor beta ; genetics

Objective To explore the protective effect of portal vein administration of propofol on hepatic ischemia reperfusion injury(HIRI) and its mechanism.Methods Thirty-two male rabbits were randomly allocated into four groups:Group A(sham operation group),the abdomen was only opened and closed;group B,the hepatic inflow was occluded for 30 min,and reperfused for 60 min;group C,the same managment as group B + propofol injected through jugular vein;group D,the treatment same as group B + propofol injected through portal vein.Drug injection was completed 20 min before hepatic inflow occlusion.Serum ALT and AST,and endothelin-1(ET-1) and nitric oxide(NO)in the hepatic tissue and blood,and the content of ATP in hepatic tissue were determined.Results The level of ET-1 in plasma and hepatic tissue was significantly increased in group B compared to group C and D(P

Tricholoma giganteum is a famous species product of Jishou in the wes t of Hunan.It have not only special biological characteristics such as formatio n and ecological enviromment,but also delicious,fragrant with abundant nutrien t.It's mycelium can be isolated and growing well in medium,but its fruiting bo dy is difficult to be formed.

Cancer is considered as one of the major diseases endangering human health in the world, it is urgent to find a safer and more efficient treatment for cancer therapy. Gene therapy with ribonucleic acid (RNA) drugs could regulate the expression of tumor related genes, and exhibit good anti-tumor therapeutic potential in preclinical and clinical trials. Based on the differences between tumor tissues and normal tissues in microenvironment signal characteristics such as pH, specific enzyme concentration or redox gradient, various microenvironment responsive nanocarriers had been studied and developed to deliver RNA drugs to tumor tissues and cells, improving the anti-tumor efficacy of RNA drugs and reducing toxic and side effects. This paper reviews the pathophysiological characteristics of tumor microenvironment and various strategies of tumor microenvironment responsive nanocarriers, in order to provide reference for the design of safe and efficient RNA drug delivery system for cancer therapy.

Objective: To investigate the alteration of bcl- 2 gene family in the rat brain and the molecular mechanism of neuronal apoptosis following traumatic brain injury. Methods: Male Sprague -Dawley rats were subjected to lateral fluid percussion brain injury(FPI) of mo derate severity. Bcl-2, Bcl-x and Bax protein expression was detected by immun ohistochemistry. Results: (1) The immunoreactivity of Bcl-2 and Bcl-x protein decreased in the hippocampus ipsilateral impact site as early as 6 h post-injury, and this was the main cause of down-regulation of the ratio of Bcl-2+Bcl-x to Bax. (2) During 1-3 d after injury, the Bax protein express i on increased significantly, while the Bcl-2 and Bcl-x protein expression decre ased relatively slow. The decreased ratio of Bcl-2+Bcl-x to Bax was mainly due to the Bax up-regulation. Conclusion: The bcl-2 gene family is involved in neuronal apoptosis after FBI, and the protein expression alteration of the family members leads the neuronal cell to apoptosis.

Objective: To investigate the alterations of bcl-2 gene family in the rat brain and the molecular mechanism of neuronal apoptosis follow ing traumatic brain injury (TBI). Methods: Male Sprague-Dawley rats were subjected to lateral fluid percussion brain injury(FPBI) of moderate severity. bax and bcl-xL mRNA and protein expression was detected by RT-PCR an d immunohistochemistry. In addition to morphological evidence of apoptosis, TUNE L histochemistry was used to identify DNA fragmentation in situ under both l ight and electron microscope, whereas characteristic internucleosomal DN A fragm entation of apoptosis was demonstrated by DNA gel electrophoresis. Resul ts: bcl-xL mRNA and protein decreased in the ipsilateral hemisphere t o the impact site as early as 6 h post-injury［(67.42±7.54)% and (85.85±5.72)% r espectively］. The decrease in bcl-xL mRNA and protein preceded apoptosis was observed 12 h post-injury. And this was the main cause of up-regulation of the ratio of bax to bcl-xL in the acute period(minutes-hours) followin g FPBI. bax mRNA and protein were observed to rise slowly, doubled 3 d post- injury, returned to sham level slowly. The delayed cell death (days-weeks) migh t associated with the up-regulation of pro-apoptotic gene bax. Conclusio n: The expression of bcl-xL and bax coincide with apoptosis following TBI. The reg ulation of bax and bcl-xL by TBI occur before transcription. The balance of bax/bcl-xL ratio determines the neurocytes to survive or die following FPBI.

The study is aimed to distinguish morphological characteristics of Dalbergiae Lignum collected from crude drug's markets and establish a identification methods and the quality standard for Dalbergiae Lignum. The macroscopic and microscopic features of Dalbergiae Lignum from crude drug's market were observed, analyzed and compared according to Hongmu specification issued by the People's Republic of China in 2000, and by the characteristics recorded in domestic monograph of Mucai Shibie (wood identification). The redwood of Dalbergiae Lignum cut into small pieces as medicinal material are dry heart wood of mahogany (trees from Dalbergia sp.), which characteristics of the small pieces as crude drug are different. There are differences in macroscopic and microscopic features about texture of wood and color, odor, taste, transverse section, radial section, tangential section. The results can provide basis for identification, application and improment of the quality standard of Dalbergiae Lignum as medicinal material.
China ; Dalbergia ; anatomy & histology ; chemistry ; classification ; Herbal Medicine ; economics ; Plants, Medicinal ; chemistry ; classification ; Quality Control ; Xylem ; anatomy & histology ; chemistry