Therapeutic products comprising vitalized placental dispersions
a technology of vitalized placental dispersions and therapeutic products, which is applied in the direction of biocide, drug composition, peptide/protein ingredients, etc., can solve the problems of high morbidity and mortality rate, unsatisfactory treatment, and local tissue damage caused by burns, etc., and achieve the effect of limited digestion
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example 1
Obtaining Placental Tissue
[0176]A whole placenta was obtained from a registered tissue bank after informed consent. The placenta and placed, with the maternal surface (rough surface) face down, on a sterile tray. The amniotic-chorionic membrane was cut and removed from the placenta. The chorionic membrane was then separated from the amnion and washed twice in PBS.
[0177]The chorionic membrane was then soaked in an anticoagulant (ACD-A) solution to remove blood clots and then washed again in PBS.
[0178]The chorionic membrane was then digested by incubation with dispase II for 30 min. at 37° C. The trophoblast layer was mechanically removed by scraping with fingers and the chorion was washed again in PBS.
[0179]The chorionic membrane was then incubated for 24 hours in an antibiotic cocktail containing gentamicin, vancomycin, and amphotericin B, and washed again in PBS.
example 2
Digesting Placental Tissue
[0180]A chorion membrane (obtained from Example 1) was digested by incubation in 200 mL of a collagenase II solution (300 U / mL in DMEM) for 10 min at 37° C. The chorionic membrane was then removed, leaving a digestion suspension containing collagenase and placental cells.
[0181]The volume and container for digestion was determined based on the need to provide a suitable digestion environment for the tissue once placed on a shaker. The digestion was carried out on a standard plate shaker set at moderate speed in a 37° C. cell culture incubator.
example 3
Obtaining Placental Cells
[0182]A digestion suspension comprising placental cells (obtained from Example 2) was centrifuged at 2000 rcf for 5 min to separate the digestive enzyme (collagenase II) from the placental cells. This step centrifugation step may enhance cell viability by preventing over-digestion and ensure that the enzyme is washed away before homogenizing the tissue. This centrifugation step pellets the cells without damaging them, allowing the collagenase II to be removed as supernatant.
[0183]The cells were then centrifuged again, the supernatant poured off, and the placental cells were resuspended in a small volume (2 mL) of cryoprotectant (5% DMSO in saline). Two mL provides an adequate volume to resuspend the cells while not over-diluting the chorion membrane dispersion once the cells have been added.
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