Abstract: The present invention provides a temperature sensitive hydrogel composition including a nucleic acid and chitosan. Since the hydrogel has excellent biocompatibility and biostability, and simultaneously has sol-gel phase transition properties depending on temperature changes, the hydrogel is present in a sol state at room temperature and becomes a gel when the hydrogel is injected into the human body or applied on the surface of epithelial skin and the temperature increases. Thus, the temperature-sensitive hydrogel of the present invention can be directly injected into and applied on certain parts requiring treatment and the retention and attaching time of a drug is increased through gelation depending on the temperature so that drug efficacy is sufficiently exhibited. Therefore, it is expected that the temperature-sensitive hydrogel of the present invention can be utilized for various treatments.

Abstract: Skin care compositions and methods are provided. In some embodiments, the skin care compositions include retinol and polydeoxyribonucleotide (PDRN). In certain embodiments, methods of using the aforementioned skin care compositions are provided as treatment for skin aging and/or acne scars.

Abstract: The present invention relates to a composition for articular cavity injection comprising a nucleic acid and chitosan. More specifically, in the present invention, it was confirmed that the sol-gel transition occurred depending on the temperature in the composition for articular cavity injection prepared through the mixing of the nucleic acid and chitosan, the proteoglycan biosynthesis of the cartilage tissue was increased by the injection of the composition and the cartilage regeneration effect was exhibited, and the pain was alleviated and the walking speed and stride which are the joint motilities were improved. Therefore, development of a therapeutic agent for arthritis having an excellent therapeutic effect using the composition for articular cavity injection comprising the nucleic acid and chitosan of the present invention is expected.

Abstract: The present invention relates to a dermal layer which is for grafting and has an improved graft survival rate, and a method for producing the same, wherein the dermal layer for grafting can be produced by filling a filling solution, including a DNA fragment mixture and chitosan, into an acellular dermal matrix from which cells have been removed. It was observed that the dermal layer for grafting produced in this manner, due to the filling solution filled therein and including a DNA fragment mixture and chitosan, increases the rate at which cells flow in from the tissue surrounding the graft and are fixed, and thereby alleviates an initial inflammatory reaction and promotes blending with the surrounding tissue.

Abstract: The present invention relates to a composition for preventing or treating ischemic enteritis containing a DNA fragment mixture isolated from sperm or testis of fish. The composition of the present invention was verified to have excellent effects in the prevention or treatment of ischemic enteritis. In addition, the composition for preventing or treating ischemic enteritis of the present invention was verified to be safe and have few side effects even when administered for a long period of time. Therefore, a medicine for ischemic enteritis, which is safe without side effects and has an excellent treatment effect, is developed by using the composition for preventing or treating ischemic enteritis of the present invention, and thus the composition of the present invention is expected to be a great help in the treatment of ischemic enteritis.

Abstract: The present invention relates to a dermal layer which is for grafting and has an improved graft survival rate, and a method for producing the same, wherein the dermal layer for grafting can be produced by filling a filling solution, including a DNA fragment mixture and chitosan, into an acellular dermal matrix from which cells have been removed. It was observed that the dermal layer for grafting produced in this manner, due to the filling solution filled therein and including a DNA fragment mixture and chitosan, increases the rate at which cells flow in from the tissue surrounding the graft and are fixed, and thereby alleviates an initial inflammatory reaction and promotes blending with the surrounding tissue.

Abstract: The present invention relates to a composition for preventing or treating ischemic enteritis containing a DNA fragment mixture isolated from sperm or testis of fish. The composition of the present invention was verified to have excellent effects in the prevention or treatment of ischemic enteritis. In addition, the composition for preventing or treating ischemic enteritis of the present invention was verified to be safe and have few side effects even when administered for a long period of time. Therefore, a medicine for ischemic enteritis, which is safe without side effects and has an excellent treatment effect, is developed by using the composition for preventing or treating ischemic enteritis of the present invention, and thus the composition of the present invention is expected to be a great help in the treatment of ischemic enteritis.