Method for massively preparing midkine antisense oligodeoxynucleotide nano-liposomes for injection
An antisense oligonucleotide and nanoliposome technology, applied in liposome delivery, gene therapy, pharmaceutical formulations, etc., can solve problems such as instability and difficulty in passing through cell membranes, and achieve the effect of improving curative effect
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Embodiment 1
[0039] Embodiment 1: Preparation of 100ml injection midkine antisense oligonucleotide nanoliposomes
[0040] Raw material: DC-Chol 100mg
[0041] DOPE 100mg
[0042] MK-ASODN 5.5g
[0043]Methanol + absolute ethanol 5ml
[0044] Glucose 8g.
[0045] Preparation:
[0046] (1) Stir DC-Chol and DOPE with methanol: absolute ethanol (v / v=1:1) at a temperature of 45°C until the solution is clear and transparent to obtain a lipid solution, which is then kept at 45°C;
[0047] (2) Then use cross-flow technology to quickly mix the lipid solution and water in a certain proportion, the volume ratio is less than 3:17, that is, the concentration of the volume percentage is lower than 15%, and the liposome obtained after mixing is ultrasonicated by a probe-type ultrasonic instrument (power 200w, ultrasonic 100 times, ultrasonic 1s, intermittent 2s), and then through a high-pressure infusion pump, the liposomes were extruded 5 times through an extruder covered with a 0...
Embodiment 2
[0051] Embodiment 2: Preparation of 500ml injection midkine antisense oligonucleotide nanoliposomes
[0052] Raw material: DC-Chol 500mg
[0053] DOPE 36.44mg
[0054] MK-ASODN 2.79mg
[0055] Absolute ethanol 10ml
[0056] Mannitol 25g.
[0057] Preparation:
[0058] Mix DC-Chol and DOPE dropwise with absolute ethanol at a temperature of 20°C until the solution is clear and transparent to obtain a lipid solution, then use cross-flow technology to quickly mix the lipid solution and phosphate buffer in a certain proportion, and mix Finally, the liposomes obtained were ultrasonicated in a water bath (power 120w, ultrasonic 5min), and then the liposomes were extruded twice through an extruder with five 0.1μm polycarbonate membranes to a uniform particle size through a high-pressure infusion pump. The liposome suspension that flows out passes through ultrafilter ultrafiltration immediately, removes organic solvent, and the liposome hydration liquid is ...
Embodiment 3
[0060] Embodiment 3: Preparation of 1000ml injection midkine antisense oligonucleotide nanoliposomes
[0061] Raw material: DC-Chol 1000mg
[0062] DOPE 72.88mg
[0063] MK-ASODN 5.58mg
[0064] Methanol 20ml.
[0065] Preparation:
[0066] Stir DC-Chol and DOPE with absolute ethanol at a temperature of 40°C until the solution is clear and transparent to obtain a lipid solution, and then use cross-flow technology to rapidly mix the lipid solution and Tris buffer in a certain proportion, and mix Finally, the obtained liposomes were ultrasonicated in a water bath (power 120w, ultrasonic 10min), and then through a high-pressure infusion pump, the MK-ASODN liposomes passed through an extruder covered with 10 pieces of 0.2μm polycarbonate membranes to achieve uniform particle size; The outflowing liposome suspension is immediately ultrafiltered through an ultrafilter to remove organic solvents, and Tris buffer is continuously replenished in the middle, which is about 6 times th...
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