3D stent for constructing in-vitro tumor model and preparation method and application of 3D stent
A construct, 3D technology, applied in the field of biomedical materials, can solve the problems of low cell culture efficiency, long cycle, signal stimulation, etc., and achieve the effect of important clinical application value, moderate degradation rate and moderate expansion rate.
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Embodiment 1
[0076] Embodiment 1 prepares silk fibroin solution
[0077] The preparation method is as follows:
[0078] (1) Take the clean cocoon shell and cut it into 0.5-1cm 2 1000ml of 0.5% sodium carbonate solution is prepared, and heated to boiling in a water bath, 5g of silkworm cocoon shells are immersed in 0.5% sodium carbonate solution, stirred with a stirring rod, and silkworm cocoon Boil the shell 3 times, 1 hour each time;
[0079] (2) Wash the silkworm cocoon with natural water for 3 times, then wash with deionized water for 3 times, then oven at 60°C for 10 hours;
[0080] (3) Dissolve the dried silkworm cocoons in (2) in lithium bromide solution, configure 9M lithium bromide solution, stir and heat with a magnetic stirrer at 60°C, add the dried silk fibroin to fully dissolve the silk fibroin; funnel filter;
[0081] (4) Dialysis: the filtrate was packed into a dialysis bag and dialyzed in a 4°C refrigerator with deionized water for 5 days, and the water was changed every...
Embodiment 2
[0084] Embodiment 2 prepares chitosan solution
[0085] The preparation method is as follows:
[0086] Weigh 1.5g of CS powder, add deionized water to make up to 100ml, and then add 2ml of glacial acetic acid solution to obtain a light yellow CS solution with a concentration of 1.5% and high viscosity.
Embodiment 3
[0087] Embodiment 3 prepares alginate solution
[0088] The preparation method is as follows:
[0089] Weigh 1.5g of sodium alginate, prepare 100ml of solution with distilled water, stir for 1.5h in a constant temperature water bath at 50°C, prepare a sodium alginate solution with a concentration of 1.5%, let stand at 10°C for 24h for degassing, and set aside.
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