Objective: To discuss the expression of heme oxygenase-1 (HO-1) protein around ischemic focus after focal cerebral ischemia-reperfusion in rats and the effect after naloxone intervention. Methods: Forty-five Sprague-Dawley rats were randomly allocated into three groups (n = 15, each): sham operation group, ischemia-reperfusion group, and naloxone group. A focal cerebral ischemia-reperfusion model was built by the suture method for middle cerebral artery occlusion (MCAO) in rats. After the successful reperfusion by inserting and withdrawing sutures, naloxone (3 mg/kg) was injected intraperitoneally into the rats of naloxone group, and isotonic saline was injected intraperitoneally into the rats of sham operation group and ischemia-reperfusion group. The expression of HO-1 was assayed by immunohistochemistry. In situ terminal deoxynucleotidyl transferase (TUNEL) assay was used to observe the numbers of brain apoptosis. Results: The numbers of HO-1 positive cell in the ischemia-reperfusion group were significantly higher than those in the sham operation group with an average of 51.6 ± 10.8 vs 9.8 ± 2.8/high-power field (HP) (P < 0.05). The numbers of HO-1 positive cell around the ischemic foci in the naloxone group were higher than those in the ischemia-reperfusion group averaged 63.5 ± 10.0 vs 51.6 ± 10.8/HP (P < 0.05). The numbers of TUNEL positive cell in the naloxone group were significantly lower than those in the ischemia-reperfusion group (20.5 ± 3.5 vs 29.8 ± 4.0/ HP,), but were higher than those in the sham operation group (4.2 ± 2.0/ HP), and there were significant differences between the groups (P < 0.05). Conclusion: Naloxone may reduce neuronal apoptosis caused by focal cerebral ischemia-reperfusion injury after MCAO, and its mechanism may be associated with the increase of naloxone-induced HO-1 expression.

Janus kinase 2,myeloproliferative leukemia virus and tet encogene family member2 mutations affect a variety of cytokines signal transduction pathway in BCR/ABL-negative myeloproliferative neoplasms (MPN). In the influence of mutation load,co-mutation and genetic susceptibility,these mutations can induce different MPN phenotypes,and affect the characteristics of patients,the distribution of peripheral blood cells and prognosis. But how these mutations contribute to disease initiation,development,and transformation needs further reseach.

The in vivo tumorigenicity of murine B16 melanoma cells engineered to secret TNF-a was observed. The retrovirus containing mouse TNF-a cDNA was generated by the virus-packing cell PA317 transfected with plasmid pXT-TNF. The B16 cell clone secreting the highest TNF-a level was obtained after G418 resistance selection, limiting dilution and the assay of TNF-a activity. After the mice were inoculated subcutaneously with the cell clone, we found the tumor growth was inhibited and the survival period of the mice extended when compared with the mice inoculated with the wild-type B16 cells . We also found that the tuinorigenicity of B16-TNF-a+ cell was associated with the cell number inoculated. At or above the 1.25? 104 cells, the percentage of the mice with detectable tumor correlated negatively with the cell number inoculated: however, at the 6.25 ? 103 cells, the percentage was higher than that at 2.5?10~(4) cells. These results encourage us to do further experiments on the following tumor cell-targeted TNF-a gene therapy.

The existent problems of medical insurance specialty core course system currently are tallied up on the foundation of definition of core course system. The strategy and measure for adjustment are put forward,providing a basis for this professional course reform.

Aged ; Aged, 80 and over ; Cross Infection ; etiology ; Diabetes Mellitus, Type 2 ; complications ; microbiology ; Humans ; Male ; Middle Aged ; Pneumoconiosis ; complications ; microbiology ; Retrospective Studies

AC133 Antigen ; Animals ; Antigens, CD ; metabolism ; Cell Differentiation ; Cell Proliferation ; Drug Resistance, Neoplasm ; Glioma ; pathology ; Glycoproteins ; metabolism ; Humans ; Neoplastic Stem Cells ; metabolism ; pathology ; physiology ; Neovascularization, Pathologic ; etiology ; pathology ; Peptides ; metabolism ; Radiation Tolerance

Adult ; Cholesteatoma, Middle Ear ; Humans ; Male

Chromosome Banding ; Colorectal Neoplasms ; genetics ; Comparative Genomic Hybridization ; methods ; standards ; DNA Probes ; DNA, Neoplasm ; genetics ; Humans ; Karyotyping ; Quality Control ; Reproducibility of Results

Objective To explore the cardiovascular risk factors and clinical features of coronary lesions in male patients with premature coronary artery disease(CAD).Methods A total of 448 male patients with CAD confirmed by angiography were divided into two groups by age: premature CAD(n=145,

The effects on frozen-thawed sperm survival rate of 16 different cryoprotective media containing different ratio of glycerol (0%, 2.5%, 5% and 7%) and sucrose (0,25,50 and 100 mmol/L) were compared. The results showed that glycerol-sucrose cryoprotective media had better effect on cryoprotection of spermatozoa than that of traditional glycerol protective medium, and appropriately increasing the concentration of sucrose and decreasing the concentration of glycerol could improve sperm motility, and especially benefit to preserve sperm linear motility at 12h postthawed. Using 5% glycerol combined with 50 mmol/L sucrose as cryoprotective medium, the sperm survival rate at 0, 6, 12h postthawed was 85.38%, 51.22%, 33.38%, respectively, the linear moving sperm survival rate was 83.74%, 33.33%, 18.38% respectively.