RESUMO
Objective To analyze the changes in the protein expression profile of peripheral blood mononuclear cells in systemic lupus erythematosus patients. Methods Peripheral blood was obtained from SLE patients and healthy controls, then mononuclear cells were isolated and the total protein was extracted by one-step method. Two-dimensional gel electrophoresis was performed and then stained with silver. Protein maps were analyzed and differentially expressed protein spots were detected using ImageMaster 2D Platinum 5.0 software. Results Match rates of (71±4)% and (72±4)% was obtained from gels from controls and pati-ents respectively. 791±17 spots were detected from control gels and 781±17 from patient gels. Eleven protein spots were up-regulated and 9 were down-regulated in SLE patients. Five proteins were identified by MS analysis, some of which had previously been shown to play a potential role in the pathogenesis of SLE. Conclusion There are significant changes in the protein expression of peripheral blood mononuclear cells in systemic lupus erythematosus patients. This study could be used as a preliminary work for better understanding of the pathogenesis and immune regulation pathways of SLE from an integrated lymphocyte protein profile perspective.
RESUMO
To investigate the gene expression profiles in acute allograft rejection of renal transplantation, and identify the markers for the early diagnosis of acute rejection, heterotopic kidney transplantation was performed by using F344 or Lewis donors and Lewis recipients. No immunosuppressant was used. Renal grafts were harvested on days 3, 7, and 14. A commercial microarray was used to measure gene expression levels in day-7 grafts. The expression levels of 48 genes were up-regulated in the allograft in comparison with the isograft control, and interferon-gamma-induced GTPase gene was most significantly up-regulated in allografts. It is concluded that a variety of pathways are involved in organ transplant rejection which is dynamic and non-balanced. IFN-inducible genes, such as IGTP, may play an important role in the rejection. A lot of important factors involved in acute rejection are unnecessary but sufficient conditions for the rejection. We are led to conclude that it is virtually impossible to make an early diagnosis based on a single gene marker, but it could be achieved on the basis of a set of markers.
Assuntos
Perfilação da Expressão Gênica , Regulação da Expressão Gênica , Rejeição de Enxerto/genética , Rejeição de Enxerto/metabolismo , Rim/metabolismo , Transplante de Rim , Sistema de Sinalização das MAP Quinases , Análise de Sequência com Séries de Oligonucleotídeos , Ratos Endogâmicos F344 , Ratos Endogâmicos Lew , Transdução de Sinais , Especificidade da Espécie , Fatores de Tempo , Transplante HomólogoRESUMO
The key constructional components for a bioartificial liver(BAL) include the source of hepatocyte cell line, the semi-permeable membrane or bioreactor and the delivery system. The most important part of a BAL is cell line. The properties of the hepatocyte cell line will directly affect the support efficacy of a BAL. This article reviewed the recent progress in researches on hepatocyte cell line used in BAL.