Objective To study the effect of adenovirus type 3I,7b on the expressions of mRNA and protein of transforming growth factor-beta 1(TGF-?1) in human embryonic lung fibroblast cells.Method The expression of mRNA and protein of TGF-?1 were determined in human embryonic lung fibroblast cells before and after being infected by adenovirus type 3I,7b and in normal fibroblast cells with enzyme-linked immunosorbent assay and in situ hybridization.Results The mRNA and protein of TGF-?1 expression in human embryonic lung fibroblast cells increased siginificantly after being infected by adenovirous type 3I,7b compared with those in normal fibroblast cells(Pa0.05).Conclusion Lung fibroblast cells and TGF-?1 may play some roles in pathophysiological processes of viral pneumonia.

Objective To compare the differences in histological morphology and hemodynamics between benign and malignant tumor, as well as differences between the different perfusional regions in tumors of the same type. Methods Thirty cases with malignant breast carcinoma and 30 cases with fibroadenoma were inspected by contrast enhanced ultrasound with time-intensity quantitive analysis. Perfusion index like peak intensity(PI), area under the curve(AUC), time to peak(TTP) and wash-out time (WOT) were collected both inside and at the margin of focus. The ultrastructures of new microvessesl were observed routinely with microscopy and transmission electron microscopy. Results The curve of malignant tumor group was characterized as ascend rapidly and drop slowly while the benign group presented as ascend slowly and drop rapidly. The AUC and WOT of malignant tumor group were significantly higher than that of benign group,while the PI and TTP had no statistical difference. In malignant tumor group,PI, AUC and WOT of the margin of focus were significantly higher than that of inside region of focus,while TTP was the opposite. However,there was no statistical differences between the perfusion parameter inside and outside of focus in benign group. The ultrastructures of newly built blood vessels in malignant group had strong ability to split,which was different from normal endothelium cells but was similar to other tumor foci. The margin of foci were characterized with dilatating and distorting vessels,and the center of the foci were occupied by narrow,occlusive new vessels and contracted anamorphic endothelium cells and pericytes. Rich microvessel areas located in the margin of foci. Conclusions The perfusion pattern,modality of time-intensity curve, mean perfusion parameter and variance of regional perfusion parameters are valuable diagnostic basis in discriminating benign and malignant breast tumor. The density,modality,distribution,structure and function of new microvessels in tumor focus are also keystone factors when tumors are assessed by means of imaging.

Barium ; poisoning ; China ; epidemiology ; Humans

Abscess ; pathology ; Adenoma ; metabolism ; pathology ; Adenoma, Sweat Gland ; metabolism ; pathology ; Biomarkers ; metabolism ; Breast Diseases ; pathology ; Breast Neoplasms ; metabolism ; pathology ; Female ; Fistula ; pathology ; Humans ; Keratin-7 ; metabolism ; Keratins ; metabolism ; Mucin-1 ; metabolism ; Nipples ; pathology ; Paget's Disease, Mammary ; metabolism ; pathology ; Receptor, ErbB-2 ; metabolism ; Sweat Gland Neoplasms ; metabolism ; pathology

Tumor blood vessels are characterized with insufficiency and distortion. Endothelial molecules of neovascularization and the heterogeneity of microvasculature in tumor interstitial are the basis for molecular-targeted ultrasonic evaluation of tumor angiogenesis, and has become focus in recent years. Research progresses of molecular-targeted ultrasonic imaging in angiogenesis and heterogeneity of tumors were reviewed in this article.

330 cases of impacted mandibular third molar were divided into 3 groups,A:younger than 18 years,B:18-25-year-old,C:ol-der than 25-year.Operation time(min)of group A,B and C was 21.95 ±5.86,6.45 ±4.92 and 18.77 ±9.64(B vs A or C,P <0.01), intraoperative complication rates were 2.73%,6.36% and 30.91%(P <0.01),postoperative complication rates were 51.82%,23.64%and 66.36%(P <0.05),respectively.18-25 year-old is the suitable age for removal of impacted mandibular third molars.

[Objective]To evaluate the method and curative effect of posterior internal fixation and bone grafting fusion for atlantoaxial fracture or dislocation.[Method]Posterior internal fixation and bone grafting fusion were made on 26 patients with atlantoaxial fracture or dislocation in condition of tracheal intubation anesthesia.Occipitocervieal fixation(Aixs) and bone grafting fusion were performed on patients with fracture of vertebral lamina-arch.Vertebral lamina splint fixation (Apofix) was performed on patients without fracture of vertebral lamina-arch and decompression of vertebral canal.[Result]Followed up for 5 to 60 months(averaged,16.8 months),the vertebral artery and spinal cord injury were not occurred and clinical symptom was relieved in all patients.X ray examination showed screws in vertebral articular process and occipital condyle were normotopic without laxation and fragmentation.The bone grafting transformed into osseous fusion after 3 months.[Conclusion]Aixs fixation and bone grafting fusion and Apofix fixation are effective methods for atlantoaxial fracture or dislocation.

Objective To determine the relation between level of caloric responses and temperature of stimulus.Methods An bithermal caloric air irrigator was used to obtain maximum slow component speed caloric responses of 120 patients reported history of dizziness. The nystagmus was measured and recorded by electronystagmography.Results The maximum slow-phase speed of the responses to hot air was greater than that to cold air ( P

The development of membrane separation technology in antibioti cs extraction was presented. The application of high performance capillary electr ophoresis, aqueous two-phase system and reverse micelles extraction were also b riefly introduced. Besides, the foreground of these modern separation technolog ies was discussed.

Castor(Ricinus communis L.),a high energy-stored and industrial raw-material plant species,is of great value in its application.Progresses in castor biotechnology were summarized in terms of tissue culture and genetic transformation.The results of studies on tissue culture indicated that application of TDZ(thiadiazuron) gave the maximum rate of shoot proliferation in various exogenous hormones when embryo axis was used as explant.On this ground,the in vitro regeneration system was established.The studies on castor genetic transformation showed that the Agrobaterium-mediated method was the most suitable one in different castor transformation methods.The hygromycin is suitable to selection of castor transfomants while castor embryo axis is insensitive to kanamycin.The possibilities of breeding of new castor varieties and improvement of castor production via biotechnology were also discussed.