Lipid-cationic polymer siRNA gene transfection agent and preparation method thereof
A cationic polymer and gene transfection technology, applied in the field of compounds, can solve the problems of low efficiency of cationic polymers, low affinity between cationic polymers and cell membranes, etc., to overcome poor biocompatibility, save experimental time, and facilitate arrangement and adjustment Effect
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Embodiment 1
[0025] Example 1 Preparation of lipid-cationic polymer siRNA gene transfection reagent
[0026] 1) synthetic lipid-cationic polymer: 1. add 200ml CH in reaction vessel 2 Cl 2 , 0.3ml N,N-dimethylformamide and 28.4g brazilenic acid (C22:1, trans-13), stirred to dissolve. Place in an ice bath to cool to 0°C, maintain this temperature, slowly add 20ml of oxalyl chloride dropwise, stir for 20min, heat up to 25°C in a water bath, add 200ml of toluene, then heat in a 56°C water bath, keep the constant temperature at 56°C, reduce the temperature under vacuum The solvent was evaporated by rotary evaporation until no liquid flowed out. 2. Dissolve the residue in 200ml CH 2 Cl 2 , and cooled to 0°C, added 90ml diethanolamine, 15g 4-dimethylaminopyridine and 28ml ethylamine, stirred at 0°C for 30min and then stirred at room temperature overnight. 3. Add 100ml CH 2 Cl 2 Dilute, stir for 5min, wash with 200ml 0.1mmol / L hydrochloric acid, and wash the organic layer with 200ml 0.02mol...
Embodiment 2
[0029] Example 2 Preparation of lipid-cationic polymer siRNA gene transfection reagent
[0030] 1) synthetic lipid-cationic polymer: 1. add 200ml CH in reaction vessel 2 Cl 2 , 0.6ml of N,N-dimethylformamide and 37.2g of brassenoic acid, stirred to dissolve it. Place in an ice bath to cool to 0°C, maintain this temperature, slowly add 40ml of oxalyl chloride dropwise, stir for 20min, then heat up to 25°C in a water bath, add 300ml of toluene, then heat in a 56°C water bath, keep the constant temperature at 56°C, vacuum reduce The solvent was evaporated by rotary evaporation until no liquid flowed out. 2. Dissolve the residue in 200ml CH 2 Cl 2 , and cooled to 0°C, added 120ml diethanolamine, 21g 4-dimethylaminopyridine and 40ml ethylamine, stirred at 0°C for 30min and then stirred at room temperature overnight. 3. Add 100ml CH 2 Cl 2 Dilute, stir for 5min, wash with 300ml 0.1mmol / L hydrochloric acid, and wash the organic layer with 300ml 0.02mol / L NaHCO 3 Wash, and fin...
Embodiment 3
[0033] Example 3 Preparation of lipid-cationic polymer siRNA gene transfection reagent
[0034] 1) synthetic lipid-cationic polymer: 1. add 200ml CH in reaction vessel 2 Cl 2 , 0.8ml of N,N-dimethylformamide and 34g of brassenoic acid, stirred to dissolve it. Place in an ice bath to cool to 0°C, maintain this temperature, slowly add 30ml of oxalyl chloride dropwise, stir for 20 minutes, then heat up to 25°C in a water bath, add 250ml of toluene, then heat in a 56°C water bath, keep the constant temperature at 56°C, vacuum The solvent was evaporated by rotary evaporation until no liquid flowed out. 2. Dissolve the residue in 200ml CH 2 Cl 2 , and cooled to 0°C, added 100ml diethanolamine, 18g 4-dimethylaminopyridine and 35ml ethylamine, stirred at 0°C for 30min and then stirred overnight at room temperature. 3. Add 100ml CH 2 Cl 2 Dilute, stir for 5min, wash with 250ml 0.1mmol / L hydrochloric acid, and wash the organic layer with 250ml 0.02mol / L NaHCO 3 Wash, and finally...
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