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Objective An optimal radiation dose was made research on tumor cells to develop effective tumor fusion vaccines. Methods We used the RS 2000 biological X-ray radiation instrument to produce different dose of X-rays.Mouse liver cancer cells line,BNL 1ME a.7R.1(MEAR),was used for experiment.The RS 2000 biological X-ray radiation was applied to create different tumor cell clones,which could help us to study the rela-tionship between irradiation dose and tumor cells′proliferation activity.Furthermore,the fusion cells′anti-tumor ef-fect was examined by flow cytometry. Results High-dose radiation would induce the lower proliferation of cancer cells than low-dose irradiation do.Conclusions During the preparation of fusion vaccines,irradiation dose should be considered as a factor that would influence the tumor cells′ proliferation activity. When the dose of irradiation was appropriate,we could make safe and efficient integration cell vaccines.
RESUMO
Objective To compare the pathological and serological difference of rheumatoid arthritis (RA) models in severe combined immunodeficiency (SCID) mice transplanted with synovial tissues from patients with rheumatoid arthritis (SCID-HuRAg mice) established either by renal capsule or subcutaneous back heterotopic transplantation. Methods RA synovium and normal human cartilage were co-implanted subcutaneously into the backs or under the renal capsule of 15 SCID mice. Engrafted tissues and serum were taken at the 4th and 8th week after transplantation. Histopathology and ELISA were performed to compare their histological and serological differences with RA. Results The morbidity and taken rate were significantly increased in the subcutaneous back of the mice group than the renal capsule group. The degree of cartilage erosion as well as the titers of serum IgM type rheumatoid factor suggested no significant difference between the two groups of SCID-HuRAg model devel oped by different engraft methods. Conclusion Back subcutaneous transplantation SCID-HuRAg model can be an ideal and stable animal model for studies on the pathogenesis and biotherapy of RA.
RESUMO
Objective To evaluate the value of magnetic resonance imaging in rheumatoid arthritis(RA) of the knee and compare with radiography.Methods 34 cases of RA of the knee were performed MRI and radiography.Enhanced MRI scans were obtained in 13 knees.Results On MRI there were bone erosion in 34 knees,subchondral sclerosis in 21 knees,meniscus destruction in 22 knees,cartilage damage in 15 knees,tibia movement in 10 knees,posterior cruciate ligament dragged in 8 knees.Pannus adhesion,proliferation synovium and joint effusion were showed on enhanced MRI in all of the 13 knees.On radiography bone erosion was showed in 1 knee,subchondral sclerosis in 11 knees,joint space stricture in 16 knees,tibia movement in 8 knees.Conclusion MRI is much better than radiolgraphy for diagnosis of RA of the knee.
