OBJECTIVE The study was initiated to obtain histologic distribution, clinical features, and treatment results in patients with primary gastrointestinal non-Hodgkin's lymphomas.METHODS Between January 1990 and Janu...OBJECTIVE The study was initiated to obtain histologic distribution, clinical features, and treatment results in patients with primary gastrointestinal non-Hodgkin's lymphomas.METHODS Between January 1990 and January 2000, 89 PGI NHL patients were eligible to evaluate clinical features. Histological and immunohistological studies were routinely used and all the specimens were reclassified according to the recently published WHO classification system.RESULTS (1)Clinically, among the 89 patients, there were 24 patients in stage IE,33 in stage IIE,19 in stage IIIE,and 13 in stage IVE. (2)Immunohistological studies revealed 72 patients were with B-cell type and only 17 with T-cell type. (3)Altogether, 15 MALT lymphoma were diagnosed among 89 PGI NHL patients, and 14/15 were found primary in the stomach.(4)The 3-year and 5-year overall survival were 77.0% (57/74) and 53.6% (30/56)for the total group.CONCLUSION No clinical symptoms and signs were found to be specific for the diagnosis of PGI NHL. Most patients were in stage IE and liE when diagnosed and the intermediate grade and B-cell type were more common than the others. Surgical resection of the tumor and standard combined chemotherapy post surgery were suggested to be the most effective measures for the long term survival of the PGI NHL patients.展开更多
OBJECTIVE The human leukemia K562-n cell line displays much higher tumorigenic actively in nude mice compared with its parental K562 cell line. The molecular mechanism of the differences in tumorigenicity between K562...OBJECTIVE The human leukemia K562-n cell line displays much higher tumorigenic actively in nude mice compared with its parental K562 cell line. The molecular mechanism of the differences in tumorigenicity between K562-n and K562 in nude mice was examined.METHODS The differences in gene expression between K562 and K562-n cells were analyzed by using cDNA microarrays.RESULTS Among the 12,800 genes examined, there was a significant difference in expression of 139 genes between K562-n and K562 cells.Eighty-five of these genes have been registered in the GeneBank and 54 are unknown. The genes accessible from the GeneBank include:l) oncogenes and tumor-supressor genes; 2) genes related to transcription regulation, the cell cycle and apoptosis; 3) genes related to the cytoskeleton and cytokinetics; 4) genes related to metabolism and transport; 5) genes related to immune function. There were also some differently expressed genes with mixed functions.CONCLUSION There are many genes differentially expressed between K562-n and K562 cells .The high tumorigenicity of the human leukemia K562-n cell line in nude mice might be related to its specific geneexpression profile.展开更多
文摘OBJECTIVE The study was initiated to obtain histologic distribution, clinical features, and treatment results in patients with primary gastrointestinal non-Hodgkin's lymphomas.METHODS Between January 1990 and January 2000, 89 PGI NHL patients were eligible to evaluate clinical features. Histological and immunohistological studies were routinely used and all the specimens were reclassified according to the recently published WHO classification system.RESULTS (1)Clinically, among the 89 patients, there were 24 patients in stage IE,33 in stage IIE,19 in stage IIIE,and 13 in stage IVE. (2)Immunohistological studies revealed 72 patients were with B-cell type and only 17 with T-cell type. (3)Altogether, 15 MALT lymphoma were diagnosed among 89 PGI NHL patients, and 14/15 were found primary in the stomach.(4)The 3-year and 5-year overall survival were 77.0% (57/74) and 53.6% (30/56)for the total group.CONCLUSION No clinical symptoms and signs were found to be specific for the diagnosis of PGI NHL. Most patients were in stage IE and liE when diagnosed and the intermediate grade and B-cell type were more common than the others. Surgical resection of the tumor and standard combined chemotherapy post surgery were suggested to be the most effective measures for the long term survival of the PGI NHL patients.
文摘OBJECTIVE The human leukemia K562-n cell line displays much higher tumorigenic actively in nude mice compared with its parental K562 cell line. The molecular mechanism of the differences in tumorigenicity between K562-n and K562 in nude mice was examined.METHODS The differences in gene expression between K562 and K562-n cells were analyzed by using cDNA microarrays.RESULTS Among the 12,800 genes examined, there was a significant difference in expression of 139 genes between K562-n and K562 cells.Eighty-five of these genes have been registered in the GeneBank and 54 are unknown. The genes accessible from the GeneBank include:l) oncogenes and tumor-supressor genes; 2) genes related to transcription regulation, the cell cycle and apoptosis; 3) genes related to the cytoskeleton and cytokinetics; 4) genes related to metabolism and transport; 5) genes related to immune function. There were also some differently expressed genes with mixed functions.CONCLUSION There are many genes differentially expressed between K562-n and K562 cells .The high tumorigenicity of the human leukemia K562-n cell line in nude mice might be related to its specific geneexpression profile.
