目的:研究紫光ALA(5-氨基酮戊酸)-PDT(光动力疗法)对B16F10黑色素瘤患者体内黑色素的淡化作用,以及结合单独红光或红光ALA-PDT照射对黑色素瘤的生长抑制作用。方法:在裸鼠腹部皮下注射建立B16黑色素瘤模型,6天后进行ALA-PDT治疗;将体内...目的:研究紫光ALA(5-氨基酮戊酸)-PDT(光动力疗法)对B16F10黑色素瘤患者体内黑色素的淡化作用,以及结合单独红光或红光ALA-PDT照射对黑色素瘤的生长抑制作用。方法:在裸鼠腹部皮下注射建立B16黑色素瘤模型,6天后进行ALA-PDT治疗;将体内长成黑色素瘤的裸鼠分为5组,并对所有裸鼠右侧腹部注射ALA200mg/kg,30分钟后对第1组进行紫光(波长为420nm,照射剂量为2.8m W/cm^2)加单红光(波长为634nm,照射剂量为87 m W/cm^2)照射、第二组红光(波长为634nm,照射剂量为87 m W/cm^2)照射、第三组紫光(2.8m W/cm^2)照射、第四组紫光(2.8m W/cm^2)照射后,给予ALA,再结合红光照射(87 m W/cm^2)、第五组作为对照组仅给予ALA注射。结果:第1组裸鼠治疗结果与第2组治疗结果无明显差异(P=0.417),但与对照组差异显著(P<0.05);第4组裸鼠治疗取得明显效果。结论:紫光ALA-PDT淡化法结合单独红光照射对黑色素瘤治疗的疗效不显著,而紫光ALA-PDT淡化法结合红光ALA-PDT明显抑制了黑色素瘤的生长,其可能成为治疗黑色素瘤的非手术无创伤性新的方法。展开更多
The leukaemia cells HL60, incubated in 10 mM/ml ALA (5-aminolevulinic) for 4 hours, were carried an experimental research with fluorescent probes in photodynamic therapy (PDT) based on ALA by using PDT reaction room (...The leukaemia cells HL60, incubated in 10 mM/ml ALA (5-aminolevulinic) for 4 hours, were carried an experimental research with fluorescent probes in photodynamic therapy (PDT) based on ALA by using PDT reaction room (The average fluence rate of the 412 nm source was 5 mW/cm2). Cells viability were determined using a Cell Counting Kit-8 (CCK-8) assay, and PpIX Photobleaching of subcellular distributed sites of HL60 cells in vitro were investigated by fluorescence spectra acquired during treatment. The results showed that the fluorescence intensity of mitochondria, lysosomes, endoplasmic reticulum had decreased by 81.5%, 52.3% and 21.0%, respectively, compared with their initial values after a 45-minute light treatment. The rate of PpIX photobleaching in mitochondria was significantly higher than others. Addi-tionally, the change of the activity of HL60 cells was basically characterized by the change fluorescence intensity in mitochondria, which suggest that mitochondria is one of main therapeutic targets of photodynamic therapy.展开更多
文摘目的:研究紫光ALA(5-氨基酮戊酸)-PDT(光动力疗法)对B16F10黑色素瘤患者体内黑色素的淡化作用,以及结合单独红光或红光ALA-PDT照射对黑色素瘤的生长抑制作用。方法:在裸鼠腹部皮下注射建立B16黑色素瘤模型,6天后进行ALA-PDT治疗;将体内长成黑色素瘤的裸鼠分为5组,并对所有裸鼠右侧腹部注射ALA200mg/kg,30分钟后对第1组进行紫光(波长为420nm,照射剂量为2.8m W/cm^2)加单红光(波长为634nm,照射剂量为87 m W/cm^2)照射、第二组红光(波长为634nm,照射剂量为87 m W/cm^2)照射、第三组紫光(2.8m W/cm^2)照射、第四组紫光(2.8m W/cm^2)照射后,给予ALA,再结合红光照射(87 m W/cm^2)、第五组作为对照组仅给予ALA注射。结果:第1组裸鼠治疗结果与第2组治疗结果无明显差异(P=0.417),但与对照组差异显著(P<0.05);第4组裸鼠治疗取得明显效果。结论:紫光ALA-PDT淡化法结合单独红光照射对黑色素瘤治疗的疗效不显著,而紫光ALA-PDT淡化法结合红光ALA-PDT明显抑制了黑色素瘤的生长,其可能成为治疗黑色素瘤的非手术无创伤性新的方法。
文摘The leukaemia cells HL60, incubated in 10 mM/ml ALA (5-aminolevulinic) for 4 hours, were carried an experimental research with fluorescent probes in photodynamic therapy (PDT) based on ALA by using PDT reaction room (The average fluence rate of the 412 nm source was 5 mW/cm2). Cells viability were determined using a Cell Counting Kit-8 (CCK-8) assay, and PpIX Photobleaching of subcellular distributed sites of HL60 cells in vitro were investigated by fluorescence spectra acquired during treatment. The results showed that the fluorescence intensity of mitochondria, lysosomes, endoplasmic reticulum had decreased by 81.5%, 52.3% and 21.0%, respectively, compared with their initial values after a 45-minute light treatment. The rate of PpIX photobleaching in mitochondria was significantly higher than others. Addi-tionally, the change of the activity of HL60 cells was basically characterized by the change fluorescence intensity in mitochondria, which suggest that mitochondria is one of main therapeutic targets of photodynamic therapy.
