首页> 美国政府科技报告 >Influence of Oscillating Electromagnetic Fields on Membrane Structure and Function: Synthetic Liposome and Natural Membrane Bilayer Systems with Direct Application to the Controlled Delivery of Chemical Agents.
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Influence of Oscillating Electromagnetic Fields on Membrane Structure and Function: Synthetic Liposome and Natural Membrane Bilayer Systems with Direct Application to the Controlled Delivery of Chemical Agents.

机译:振荡电磁场对膜结构和功能的影响:合成脂质体和天然膜双层体系直接应用于化学药剂的控制输送。

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Investigations have been conducted to determine if an imposed electromagnetic field can influence membrane transport, and ion and drug permeability in both synthetic and natural cell membrane systems. Microwave fields enhance accumulation of sodium in the lymphocyte and induce protein shedding at Tc. Microwaves also trigger membrane permeability of liposome systems under specific field exposure conditions. Sensitivity varies in a defined way in bilayers displaying a membrane structural phase transition temperature, Tc; maximal release was observed at or near Tc. Significantly, liposome systems without a membrane phase transition were also found to experience permeability increases but, in contrast, this response was temperature independent. The above results indicate that field-enhanced drug release occurs in liposome vesicles that possess a Tc as well as non-Tc liposomes. Additional studies extend non-Tc liposome responses to the in vivo case in which microwaves trigger Gentamicin release from a liposome ''depot'' placed subcutaneously in the rat hind leg. In addition, evidence is provided that cell surface sequestered liposomes can be triggered by microwave fields to release drugs directly into target cells. 24 refs., 6 figs.

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