Investigation on Large Molecule Permeation through Liposome Lipid Bilayer Induced by Microplasma Irradiation
Gene transfection
Gene transfection
Application area
Gene therapy
Regenerative medicine
Drug discovery
Plant breeding
Problems for conventional methods
Lipofection (chemical method)
High cost for reagent Toxicity of reagent
Electroporation (physical metod)
Cell viability
Vitral vector (biological method)
Pathogenicity expression Neoplastic transformation
Microplasma irradiation ethod
Fluorescent dye(YoYo-1, -1.3 kDa)
Plasmid (pCX-EGFP encoding, -3.6 MDa)
Objective and experiment
Assumed process during transfection
Effective factors generated in the microplasma
Electrical factors E field, current, charge Chemical factors Radicals, RONS
Process on cell membrane
Electrical process Charge compensation Poration (current, shock wave)
Biological process Cell activation Endocytosis
Chemical process Poration (oxidation)
Objective of the present study
-Toclarify the key factors and processes for plasma gee transfection
-Liposome is employed to eliminate the biological process
Preparation of liposome
Natural swelling method
Lipid
1,2-Dioleoyl-snglycero-3-Phosphatidycholine
Experiment 1:
Verification of membrane poration
Experiment 2:
Verification of charge accumulation
Plasma irradiation to liposome suspension (1 mM,4μl/well)
Liposome suspension (30 μl,2 mM) was poured to electrophoresis chamber diluted with DI water (170 μl)
Observatio of electrophoresis
Voltage 20 V
Duration 15 s
Results and discussion
Result 1 : Verification of membrane poration
Single irradiation (0.05-20 ms)
Multiple irradiation (5 ms*n)
Monotonic decrease in fluorescence and liposome size by plasma irradiation time
Large molecule transfer by membrane poration was verified
Multiple irradiation (5 ms*n) showed less decrease in fluorescence and liposome size than one time irradiation (5n ms)
Repair of the poration between each irradiation was suggested
Result 2 : Verification of charge accumulation
Single irradiation (0.05-20 ms)
Multiple irradiation (5 ms*n)
Neutralization of negative charge on the membrane was observed
>> 0.1 ms irradiation is enough for neutralization of 102 liposomes
>> Enhancement of contact probability between cells and DNAs in the plasma gene
transfection process was suggested
Conclusion
As key processes for plasma gene transfection, the following processes were suggested
- Membrane poration (repaired after 5 ms irradiation)
– Enhancement of contact probability between cells and DNAs by charge neutralization
Investigation on Large Molecule Permeation through Liposome Lipid Bilayer Induced by Microplasma IrradiationGene transfectionGene transfectionApplication area Gene therapy Regenerative medicine Drug discovery Plant breedingProblems for conventional methods Lipofection (chemical method) High cost for reagent Toxicity of reagent Electroporation (physical metod) Cell viability Vitral vector (biological method) Pathogenicity expression Neoplastic transformationMicroplasma irradiation ethod Fluorescent dye(YoYo-1, -1.3 kDa) Plasmid (pCX-EGFP encoding, -3.6 MDa)Objective and experimentAssumed process during transfectionEffective factors generated in the microplasmaElectrical factors E field, current, charge Chemical factors Radicals, RONSProcess on cell membraneElectrical process Charge compensation Poration (current, shock wave)Biological process Cell activation EndocytosisChemical process Poration (oxidation)Objective of the present study -Toclarify the key factors and processes for plasma gee transfection -Liposome is employed to eliminate the biological processPreparation of liposomeNatural swelling methodLipid 1,2-Dioleoyl-snglycero-3-PhosphatidycholineExperiment 1:Verification of membrane porationExperiment 2:Verification of charge accumulation Plasma irradiation to liposome suspension (1 mM,4μl/well) Liposome suspension (30 μl,2 mM) was poured to electrophoresis chamber diluted with DI water (170 μl) Observatio of electrophoresis Voltage 20 V Duration 15 sResults and discussionResult 1 : Verification of membrane poration Single irradiation (0.05-20 ms) Multiple irradiation (5 ms*n) Monotonic decrease in fluorescence and liposome size by plasma irradiation time Large molecule transfer by membrane poration was verifiedMultiple irradiation (5 ms*n) showed less decrease in fluorescence and liposome size than one time irradiation (5n ms) Repair of the poration between each irradiation was suggestedResult 2 : Verification of charge accumulation Single irradiation (0.05-20 ms) Multiple irradiation (5 ms*n) Neutralization of negative charge on the membrane was observed >> 0.1 ms irradiation is enough for neutralization of 102 liposomes>> Enhancement of contact probability between cells and DNAs in the plasma gene transfection process was suggestedConclusion As key processes for plasma gene transfection, the following processes were suggested- Membrane poration (repaired after 5 ms irradiation)– Enhancement of contact probability between cells and DNAs by charge neutralization
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