4results about How to "Strong regenerative" patented technology

The present invention relates to a core-shell magnetic molecular imprinted polymer material, a preparation method and its application in enriching 25 steroid hormones in blood. The present invention is based on the polymerization reaction of 3,3-dihydroxybenzidine and p-benzoquinone, precipitates and polymerizes on the surface of magnetic ferroferric oxide nanoparticles modified with silicon dioxide to form a polymer layer, and simultaneously uses virtual template betamethasone for imprinting treatment to obtain a core-shell magnetic molecular imprinted polymer material. The core-shell magnetic molecular imprinted polymer material prepared by the present invention has good magnetic responsiveness. The adsorption test of 25 steroid hormones shows that the core-shell magnetic molecular imprinted polymer material of the present invention has good adsorption and desorption effects, and is convenient to separate and recyclable after adsorption, and has good application prospects.

The invention provides a co-culture system for increasing the yield of endometrial stem cell exosomes and a method for increasing the yield of endometrial stem cell exosomes, firstly, fibroblasts are subjected to mitomycin C pretreatment, so that the cells are stagnated in G1, S and G2 stages of a cell cycle, meanwhile, RNA and protein synthesis continues to be carried out, and the endometrial stem cell exosomes are obtained; the fibroblasts are kept in a non-proliferative but metabolic active state; then, endometrial stem cells extracted from endometrial tissues in the proliferation period and fibroblasts are indirectly co-cultured through a Transwell chamber and are separated through a semi-permeable membrane, and stem cell differentiation caused by inter-cell contact reaction and fusion of the stem cells and somatic cells is eliminated; after co-culture, taking out the endometrial stem cells, putting the endometrial stem cells into a serum-free culture medium special for exosomes for separate culture, harvesting cell supernate, and purifying the exosomes; compared with the endometrial stem cells which are independently cultured in the whole process, the co-culture system disclosed by the invention has the advantages that the amplification speed of the endometrial stem cells and the exosome yield of unit quantity of cells are remarkably improved.

This invention discloses a network-like porous poly(3,4-hydroxybutyrate) microsphere, its preparation method, and its applications, belonging to the field of biomedical materials technology. The microspheres exhibit a villous network structure with a continuous, irregular "ridge-valley" topology on their surface. The network-like porous poly(3,4-hydroxybutyrate) microspheres provided by this invention maintain good structural integrity even after 6 months of in vivo implantation, significantly increase ATP levels in fibroblasts under glucose-free conditions, and inhibit cell senescence. They also induce macrophages to transform from a pro-inflammatory M1 phenotype to a pro-repair M2 phenotype, avoiding the excessive inflammatory response commonly seen in PLLA-type microspheres, and demonstrate superior collagen regeneration promotion compared to PLLA-type microspheres. Furthermore, they facilitate cell adhesion and proliferation.

This invention relates to the field of animal model construction technology, and more particularly to a method for constructing a zebrafish coronary artery microcirculation injury model based on enzyme stripping and its application. This invention, for the first time, utilizes a rationally composed mixture of collagenases to specifically strip coronary artery endothelial cells, minimizing non-specific damage to cardiomyocytes and stably inducing coronary artery injury to construct a zebrafish model of coronary artery injury, particularly coronary artery microcirculation injury. This model not only has a highly localized injury area and minimal impact on the myocardium, but also exhibits a low mortality rate. Furthermore, the zebrafish model of coronary artery injury constructed by this invention demonstrates significant regenerative potential, with its blood vessels exhibiting strong regenerative capacity. It also shows high sensitivity and responsiveness to drugs, making it potentially valuable in drug screening and mechanism research.