Plasma-activated water(PAW),as an extended form of cold atmospheric-pressure plasma,greatly expands the application of plasma-based technology.The biological effects of PAW are closely related to the aqueous reactive ...Plasma-activated water(PAW),as an extended form of cold atmospheric-pressure plasma,greatly expands the application of plasma-based technology.The biological effects of PAW are closely related to the aqueous reactive species,which can be regulated by the activation process.In this study,surface plasma-activated air(SAA)and a He+O_(2)plasma jet(Jet)were parallelly combined(the SAA+Jet combination)or sequentially combined(the SAA→Jet combination and the Jet→SAA combination)to prepare plasma-activated saline(PAS).The PAS activated by the combinations exhibited stronger bactericidal effects than that activated by the SAA or the Jet alone.The concentrations of H_(2)O_(2)and NO_(2)^(-)were higher in the PAS activated by the Jet→SAA combination,while ONOO^(-)concentrations were close in the three kinds of PAS and^(1)O_(2)concentrations were higher in the PAS activated by the SAA+Jet combination.The analysis of scavengers also demonstrated that H_(2)O_(2),^(1)O_(2),and ONOO^(-)in the PAS activated by the SAA+Jet combination,and^(1)O_(2)in the PAS activated by the Jet→SAA combination played critical roles in bactericidal effects.Further,the effective placement time of the three PAS varied,and the PAS activated by the Jet→SAA combination could also inactivate 2.6-log_(10)of MRSA cells after placement for more than 60 min.The regulation of reactive species in plasma-activated water via different combinations of plasma devices could improve the directional application of plasma-activated water in the biomedical field.展开更多
目的探讨等离子体对Ha Ca T细胞活性、细胞因子表达的影响及作用机制,为其在皮肤创伤愈合的应用提供理论依据。方法 CCK-8法测定不同时间等离子体处理对Ha Ca T细胞活性的影响,流式细胞术检测处理后细胞内活性氧水平改变,并与有NAC存在...目的探讨等离子体对Ha Ca T细胞活性、细胞因子表达的影响及作用机制,为其在皮肤创伤愈合的应用提供理论依据。方法 CCK-8法测定不同时间等离子体处理对Ha Ca T细胞活性的影响,流式细胞术检测处理后细胞内活性氧水平改变,并与有NAC存在条件下的改变进行比较;酶标仪检测处理介质PBS中H2O2浓度;采用ELISA及Realtime PCR方法分析等离子体处理后Ha Ca T生成细胞因子在蛋白和mRNA水平的改变。结果沿面空气等离子体对Ha Ca T细胞具有细胞毒性,呈剂量-时间依赖性。等离子体处理可升高细胞内ROS水平,NAC能够明显抑制等离子体处理引起的Ha Ca T细胞活性下降及细胞内ROS水平的增加。与对照组相比,等离子体照射可在不同程度上引起细胞因子IL-1βmRNA水平的增加,可明显增加IL-6、IL-8、VEGF蛋白及mRNA的水平。结论空气沿面等离子可通过提高细胞内ROS水平发挥细胞毒性作用,其一定程度上的促炎作用及促进生长因子的分泌作用可能在创伤愈合治疗中具有重要意义。展开更多
基金supported by National Natural Science Foundation of China(No.51977174)。
文摘Plasma-activated water(PAW),as an extended form of cold atmospheric-pressure plasma,greatly expands the application of plasma-based technology.The biological effects of PAW are closely related to the aqueous reactive species,which can be regulated by the activation process.In this study,surface plasma-activated air(SAA)and a He+O_(2)plasma jet(Jet)were parallelly combined(the SAA+Jet combination)or sequentially combined(the SAA→Jet combination and the Jet→SAA combination)to prepare plasma-activated saline(PAS).The PAS activated by the combinations exhibited stronger bactericidal effects than that activated by the SAA or the Jet alone.The concentrations of H_(2)O_(2)and NO_(2)^(-)were higher in the PAS activated by the Jet→SAA combination,while ONOO^(-)concentrations were close in the three kinds of PAS and^(1)O_(2)concentrations were higher in the PAS activated by the SAA+Jet combination.The analysis of scavengers also demonstrated that H_(2)O_(2),^(1)O_(2),and ONOO^(-)in the PAS activated by the SAA+Jet combination,and^(1)O_(2)in the PAS activated by the Jet→SAA combination played critical roles in bactericidal effects.Further,the effective placement time of the three PAS varied,and the PAS activated by the Jet→SAA combination could also inactivate 2.6-log_(10)of MRSA cells after placement for more than 60 min.The regulation of reactive species in plasma-activated water via different combinations of plasma devices could improve the directional application of plasma-activated water in the biomedical field.
文摘目的探讨等离子体对Ha Ca T细胞活性、细胞因子表达的影响及作用机制,为其在皮肤创伤愈合的应用提供理论依据。方法 CCK-8法测定不同时间等离子体处理对Ha Ca T细胞活性的影响,流式细胞术检测处理后细胞内活性氧水平改变,并与有NAC存在条件下的改变进行比较;酶标仪检测处理介质PBS中H2O2浓度;采用ELISA及Realtime PCR方法分析等离子体处理后Ha Ca T生成细胞因子在蛋白和mRNA水平的改变。结果沿面空气等离子体对Ha Ca T细胞具有细胞毒性,呈剂量-时间依赖性。等离子体处理可升高细胞内ROS水平,NAC能够明显抑制等离子体处理引起的Ha Ca T细胞活性下降及细胞内ROS水平的增加。与对照组相比,等离子体照射可在不同程度上引起细胞因子IL-1βmRNA水平的增加,可明显增加IL-6、IL-8、VEGF蛋白及mRNA的水平。结论空气沿面等离子可通过提高细胞内ROS水平发挥细胞毒性作用,其一定程度上的促炎作用及促进生长因子的分泌作用可能在创伤愈合治疗中具有重要意义。
