Stem cell micro-needle patch for resisting wrinkles and removing freckles and preparation method thereof
An anti-wrinkle and freckle-removing technology, stem cell technology, applied in the direction of medical preparations containing active ingredients, sheet delivery, pharmaceutical formulas, etc., can solve side effects, pain and bruises, treat the symptoms but not the root cause, complications, etc., to promote absorption, youthful skin, improve the effect of intermediary metabolism
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Embodiment 1
[0036] Example 1 Preparation of Stem Cell Microneedle Patch
[0037] 1. The microneedle array made of silicon or metal materials is made by microelectronics manufacturing technology or micro-casting technology, and is sterilized for use.
[0038] 2, prepare stem cell suspension, the stem cell that the present invention contains is adipose stem cell, and the preparation extraction step of adipose stem cell is as follows:
[0039] The first step is to obtain human adipose tissue under sterile conditions, shred it and wash it with PBS solution to remove blood cells;
[0040] In the second step, the digestive juice (containing 0.1% Type collagenase and 2.5% trypsin, prepared by mixing at a ratio of 1:1) to digest adipose tissue, cut it repeatedly until it becomes a paste, and then shake and digest at 170r / min for 30 minutes;
[0041] The third step is to absorb the liquid of the single cells in the lower layer, transfer it into the complete medium (high glucose DMEM containing ...
Embodiment 2
[0048] Example 2 Identification of Adipose Stem Cells
[0049] 1. Drawing of growth curve
[0050] Take well-grown P3 generation cells, digest them with 0.25% trypsin (containing 0.2% EDTA), and dilute them with 2×10 4 / ml concentration inoculated in 24-well plate, 1 mL per well. The OD value of the cells was detected at 0, 24, 48, 72, 96, 120, 144, and 168 hours after planting. Method: Add 20 μL of MTT to each well, place in a 37°C, 5% CO2 incubator and continue to incubate for 4 hours, collect the cells in the well by centrifugation, add 150 μL of DMSO to each well, shake for 10 minutes, and use a microplate reader at 490 nm The OD value is automatically detected at the wavelength. Experiments were repeated three times. After the statistical analysis, take the culture time as the horizontal axis and the OD value as the vertical axis to draw the growth curve, such as figure 2 The growth curve of adipose stem cells shows that the cell proliferation is in good condition a...
Embodiment 3
[0053] Embodiment three face VISIA skin test effect, take the following scheme:
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