目的:探讨532nm激光不同光剂量参数及血卟啉单甲醚(HMME)不同浓度参数对体外培养的乳腺癌细胞(MCF-7)的光动力学杀伤作用。方法:MCF-7细胞用浓度分别为5μg/m l、10μg/m l、20μg/m l的HMME孵育2h后,以532nm半导体激光照射,能量密度分...目的:探讨532nm激光不同光剂量参数及血卟啉单甲醚(HMME)不同浓度参数对体外培养的乳腺癌细胞(MCF-7)的光动力学杀伤作用。方法:MCF-7细胞用浓度分别为5μg/m l、10μg/m l、20μg/m l的HMME孵育2h后,以532nm半导体激光照射,能量密度分别为0.3J/cm 2、0.6J/cm 2、1.2J/cm 2、2.4J/cm 2、4.8J/cm 2,24h后用CCK-8检测细胞存活率,并在光镜及电镜下观察细胞的形态变化。结果:随着激光剂量的增大,在一定的范围内,细胞的抑制率呈现上升趋势;能量密度为2.4J/cm 2,HM M E浓度为20μg/m l时,达到最大的抑制率为55.5%;并且细胞的抑制率也和H M M E浓度呈剂量依赖型;光镜下可观察到细胞坏死和凋亡样改变。结论:以532nm激光为光源的H M M E-PDT对M CF-7细胞有明显的杀伤作用,并在一定范围内呈光剂量和H M M E浓度剂量依赖型。展开更多
To investigate the effect of photodynamic therapy （PDT） with hematoporphrin monomethyl ether （HMME） on bovine immunodeficiency virus （BIV） can provide the basis theory for photoinactivation of human immunodefici...To investigate the effect of photodynamic therapy （PDT） with hematoporphrin monomethyl ether （HMME） on bovine immunodeficiency virus （BIV） can provide the basis theory for photoinactivation of human immunodeficiency virus （HIV）. To assess the protection of HMME-PDT on the cell line Cf2Th infected with BIVR29 by 3-（4,5）-dimethylthiahiazol-2-yl-3,5-di-phenytetrazolium bromide （MTT） with power density of 5 and 25 mW/cm^2 and energy density from 0.6 to 3 J/cm^2. To observe the inhibition of membrane fusion using a new reporter cell line BIVE by fluorescence microscope. HMME-PDT has significant protectant effects on Cf2Th-BIVR29 with both power densities, especially in the group of high power density. Fluorescent microscope shows that there is no significant difference between the group of PDT and control, which means PDT could not inhibit the BIV-mediated membrane fusion.展开更多
文摘目的:探讨532nm激光不同光剂量参数及血卟啉单甲醚(HMME)不同浓度参数对体外培养的乳腺癌细胞(MCF-7)的光动力学杀伤作用。方法:MCF-7细胞用浓度分别为5μg/m l、10μg/m l、20μg/m l的HMME孵育2h后,以532nm半导体激光照射,能量密度分别为0.3J/cm 2、0.6J/cm 2、1.2J/cm 2、2.4J/cm 2、4.8J/cm 2,24h后用CCK-8检测细胞存活率,并在光镜及电镜下观察细胞的形态变化。结果:随着激光剂量的增大,在一定的范围内,细胞的抑制率呈现上升趋势;能量密度为2.4J/cm 2,HM M E浓度为20μg/m l时,达到最大的抑制率为55.5%;并且细胞的抑制率也和H M M E浓度呈剂量依赖型;光镜下可观察到细胞坏死和凋亡样改变。结论:以532nm激光为光源的H M M E-PDT对M CF-7细胞有明显的杀伤作用,并在一定范围内呈光剂量和H M M E浓度剂量依赖型。
基金supported by the National Natural Science Foundation of China(No.60678047)the Science Foundation of Tianjin(No.05YFJZJC02300)
文摘To investigate the effect of photodynamic therapy （PDT） with hematoporphrin monomethyl ether （HMME） on bovine immunodeficiency virus （BIV） can provide the basis theory for photoinactivation of human immunodeficiency virus （HIV）. To assess the protection of HMME-PDT on the cell line Cf2Th infected with BIVR29 by 3-（4,5）-dimethylthiahiazol-2-yl-3,5-di-phenytetrazolium bromide （MTT） with power density of 5 and 25 mW/cm^2 and energy density from 0.6 to 3 J/cm^2. To observe the inhibition of membrane fusion using a new reporter cell line BIVE by fluorescence microscope. HMME-PDT has significant protectant effects on Cf2Th-BIVR29 with both power densities, especially in the group of high power density. Fluorescent microscope shows that there is no significant difference between the group of PDT and control, which means PDT could not inhibit the BIV-mediated membrane fusion.
