In regenerating liver of mice, marked increase of the activity of phosphotyrosyl protein phosphatase (PTPP) in cytosol was observed. The PTPP activity varied with time and reached the highest level between 24 to 48 ho...In regenerating liver of mice, marked increase of the activity of phosphotyrosyl protein phosphatase (PTPP) in cytosol was observed. The PTPP activity varied with time and reached the highest level between 24 to 48 hours after partial hepatectomy. In H22a cells the PTPP activity found in every subcellular fraction was lower than that of the normal liver. The PTPP activity was mostly concentrated in lysosomes of normal liver, but mainly distributed in nucleus, cytosol and microsome of regenerating liver. In H22a cells PTPP activity seemed distribute evenly. Five similar major PTPP peaks (I-V) were obtained on DEAE cellulose chromatography of cytosols from all three of liver cells studied. However, two additional PTPP peaks, a and b, were also obtained from cytosol of liver.展开更多
Having been passed for 160 generations, a cell linedesignated as H22-F25/L was established from a murine tumorlymphatic metastatlc model H22-F25 which had been set up in our college. The cell line was in suspension cu...Having been passed for 160 generations, a cell linedesignated as H22-F25/L was established from a murine tumorlymphatic metastatlc model H22-F25 which had been set up in our college. The cell line was in suspension culture with a rapid proliferation and stable growth. The peak tune of cell division and proliferation was 48 and 96 hours after culture. In a week, the cell number was Increased by 25 tunes. H22-F25/L still keeps the features of a poorly differentiated cancer. Its tumor inducing rate (in vivo)was 100% in 615 mice. Lymph node metastasis rate was 50% and pulmonary metastasis rate 10%. H22- F25/ L Is a population of heterogenetlc tumor cells Including 2 stem cell lines (the model number of chromosomes being 43 in 40% tumor cells and 86 in 32%) and some side lines. The common marker chromosomes M1, M2, M3 and M4 were present in all stem and side lines.展开更多
Effects of angiotensin Ⅱ and other six vasoactive agents on tissue blood flow of Yoahida rat ascites hepatoma AH109A and normal liver were measured by the hydrogen clearance method. The mean blood flow in the tumor p...Effects of angiotensin Ⅱ and other six vasoactive agents on tissue blood flow of Yoahida rat ascites hepatoma AH109A and normal liver were measured by the hydrogen clearance method. The mean blood flow in the tumor peripheral part under normal tension was 11. 9±8. 2ml/ min/100g tissue and was not influenced by tumor size. Tumor blood flow was more significantly increased in infusion angiotensin Ⅱthan 0.5mg/ ml methoxamine, however, normal liver blood flow of tumor-bearing rats was unchanged in contrast to an Increase seen in the tumor. A pronounced reduction of tumor blood flow was found after administration of epinephrine, norepinephrin and ethylphenylephrine. In addition, metaraminol and phenyleprine as well as 1. 0 and 2. 5mg/ ml methoxamine were not found to significantly change blood flow of the tumor.展开更多
文摘In regenerating liver of mice, marked increase of the activity of phosphotyrosyl protein phosphatase (PTPP) in cytosol was observed. The PTPP activity varied with time and reached the highest level between 24 to 48 hours after partial hepatectomy. In H22a cells the PTPP activity found in every subcellular fraction was lower than that of the normal liver. The PTPP activity was mostly concentrated in lysosomes of normal liver, but mainly distributed in nucleus, cytosol and microsome of regenerating liver. In H22a cells PTPP activity seemed distribute evenly. Five similar major PTPP peaks (I-V) were obtained on DEAE cellulose chromatography of cytosols from all three of liver cells studied. However, two additional PTPP peaks, a and b, were also obtained from cytosol of liver.
文摘Having been passed for 160 generations, a cell linedesignated as H22-F25/L was established from a murine tumorlymphatic metastatlc model H22-F25 which had been set up in our college. The cell line was in suspension culture with a rapid proliferation and stable growth. The peak tune of cell division and proliferation was 48 and 96 hours after culture. In a week, the cell number was Increased by 25 tunes. H22-F25/L still keeps the features of a poorly differentiated cancer. Its tumor inducing rate (in vivo)was 100% in 615 mice. Lymph node metastasis rate was 50% and pulmonary metastasis rate 10%. H22- F25/ L Is a population of heterogenetlc tumor cells Including 2 stem cell lines (the model number of chromosomes being 43 in 40% tumor cells and 86 in 32%) and some side lines. The common marker chromosomes M1, M2, M3 and M4 were present in all stem and side lines.
文摘Effects of angiotensin Ⅱ and other six vasoactive agents on tissue blood flow of Yoahida rat ascites hepatoma AH109A and normal liver were measured by the hydrogen clearance method. The mean blood flow in the tumor peripheral part under normal tension was 11. 9±8. 2ml/ min/100g tissue and was not influenced by tumor size. Tumor blood flow was more significantly increased in infusion angiotensin Ⅱthan 0.5mg/ ml methoxamine, however, normal liver blood flow of tumor-bearing rats was unchanged in contrast to an Increase seen in the tumor. A pronounced reduction of tumor blood flow was found after administration of epinephrine, norepinephrin and ethylphenylephrine. In addition, metaraminol and phenyleprine as well as 1. 0 and 2. 5mg/ ml methoxamine were not found to significantly change blood flow of the tumor.
