AIM:To explore the model of methotrexate(MTX)-induced mic e oral mucosa lesions METHOD:A total of 282 mice were randomly d ivided into seven groups as follows:control,MTX10,20,30,40,50,75 mg/ml The physiological salin...AIM:To explore the model of methotrexate(MTX)-induced mic e oral mucosa lesions METHOD:A total of 282 mice were randomly d ivided into seven groups as follows:control,MTX10,20,30,40,50,75 mg/ml The physiological saline solution (05 ml) was ip injecte d into mice in control group The dose of MTX (05 ml) was ip injected int o mic e in other groups only once During 10 consecutive days after administration of MTX,3 mice were sacrificed in each day in all the groups and the patholog ical chang es of oral mucosa were examed under the optical microscope RE SULT: The incidence(45%～63%) and the integral rate(194%～56%) of mice ora l mu cosa lesions in group of intermediate-dose MTX (IDMTX) (20～40 mg/kg) were sign ifi cantly higher than those in other groups The death rate (not more than 5%) in group of IDMTX was lower than that in other groups CONCLUSION:As a result of induction of higher lesion rate and lower death rate of mice oral mucosa by IDMTX (2 0～40 mg/kg),the model of IDMTX-induced oral mucosa lesion could be applie d into clinical or basic展开更多
目的 研究重组反义c myc腺病毒 (Ad AS c myc)对人急性早幼粒HL 60细胞系的诱导分化作用及分子机制 ,探讨Ad AS c myc用于急性早幼粒白血病基因治疗的可能性。方法 采用重组腺病毒Lac Z(Ad LacZ)及Ad AS c myc联合多聚阳离子转染HL 6...目的 研究重组反义c myc腺病毒 (Ad AS c myc)对人急性早幼粒HL 60细胞系的诱导分化作用及分子机制 ,探讨Ad AS c myc用于急性早幼粒白血病基因治疗的可能性。方法 采用重组腺病毒Lac Z(Ad LacZ)及Ad AS c myc联合多聚阳离子转染HL 60细胞 ,X gal染色判断转染效率。采用形态学、MTT试验、RT PCR、流式细胞仪及免疫细胞化学等方法进行研究。结果 多聚阳离子可提高腺病毒对HL 60细胞的转染 ,Ad LacZ +protaminesulfate转染率达 79 8%。Ad AS c myc能抑制HL 60细胞c myc基因在转录及蛋白水平的表达。Ad AS c myc抑制HL 60细胞生长及活力 (抑制率5 1%) ,降低其核浆比例 ,增加其过氧化酶活性 ,引起其G0 G1 阻滞及分化相关基因c fos基因表达增强。结论 Ad AS c myc对HL 60细胞具有抑制生长及诱导分化作用。其生物学作用与HL 60细胞过氧化酶活性及c fos的表达有关。Ad AS c展开更多
文摘AIM:To explore the model of methotrexate(MTX)-induced mic e oral mucosa lesions METHOD:A total of 282 mice were randomly d ivided into seven groups as follows:control,MTX10,20,30,40,50,75 mg/ml The physiological saline solution (05 ml) was ip injecte d into mice in control group The dose of MTX (05 ml) was ip injected int o mic e in other groups only once During 10 consecutive days after administration of MTX,3 mice were sacrificed in each day in all the groups and the patholog ical chang es of oral mucosa were examed under the optical microscope RE SULT: The incidence(45%～63%) and the integral rate(194%～56%) of mice ora l mu cosa lesions in group of intermediate-dose MTX (IDMTX) (20～40 mg/kg) were sign ifi cantly higher than those in other groups The death rate (not more than 5%) in group of IDMTX was lower than that in other groups CONCLUSION:As a result of induction of higher lesion rate and lower death rate of mice oral mucosa by IDMTX (2 0～40 mg/kg),the model of IDMTX-induced oral mucosa lesion could be applie d into clinical or basic
文摘目的 研究重组反义c myc腺病毒 (Ad AS c myc)对人急性早幼粒HL 60细胞系的诱导分化作用及分子机制 ,探讨Ad AS c myc用于急性早幼粒白血病基因治疗的可能性。方法 采用重组腺病毒Lac Z(Ad LacZ)及Ad AS c myc联合多聚阳离子转染HL 60细胞 ,X gal染色判断转染效率。采用形态学、MTT试验、RT PCR、流式细胞仪及免疫细胞化学等方法进行研究。结果 多聚阳离子可提高腺病毒对HL 60细胞的转染 ,Ad LacZ +protaminesulfate转染率达 79 8%。Ad AS c myc能抑制HL 60细胞c myc基因在转录及蛋白水平的表达。Ad AS c myc抑制HL 60细胞生长及活力 (抑制率5 1%) ,降低其核浆比例 ,增加其过氧化酶活性 ,引起其G0 G1 阻滞及分化相关基因c fos基因表达增强。结论 Ad AS c myc对HL 60细胞具有抑制生长及诱导分化作用。其生物学作用与HL 60细胞过氧化酶活性及c fos的表达有关。Ad AS c
