Abstract: The present invention relates to a fusion protein including an IL15 protein, an IL15 receptor alpha (IL15R?) protein, an Fc domain, and an IL2 protein, and a use thereof, and more specifically, to: a fusion protein including an IL15 protein, an IL15R? protein, an Fc domain, and an IL2 protein; a dimer including the fusion protein; a composition that is for culturing natural killer (NK) cells and includes the fusion protein or dimer; and a method for culturing NK cells. The fusion protein according to the present invention makes it possible to efficiently proliferate and culture NK cells while maintaining the cytolytic activity of the NK cells and promoting the activation of the NK cells when culturing the NK cells, thus making it possible to obtain a large number of NK cells without using feeder cells. Therefore, the fusion protein is useful for the commercialization of NK cells into safe cell therapy agents.

Abstract: Provided is an anticancer agent, comprising, as active ingredients, NK cells and a fusion protein which comprises an IL-2 protein and CD80 protein. In one specific embodiment, a fusion protein comprising a CD80 fragment, an immunoglobulin Fc and an IL-2 variant can activate immunocytes such as natural killer cells. In addition, since cancer can be effectively inhibited when co-administering with natural killer cells, the pharmaceutical composition increases the immune activity in the body so as to be effectively usable for cancer, there by having high industrial applicability.

Abstract: The present invention provides a composition for improving skin conditions, containing the extracellular domain of human bone morphogenetic protein receptor 1a as an active ingredient. The present invention contains the extracellular domain of human bone morphogenetic protein receptor 1a as an active ingredient inside a nanoliposome comprising hydrogenated lecithin as a constituent component, and the particle size is 50-250 nm. The composition of the present invention reduces wrinkles and alleviates atopic dermatitis. In addition, the present invention provides a method for improving skin conditions, comprising the step of administering a composition containing the extracellular domain of human bone morphogenetic protein receptor 1a as an active ingredient to a subject.

Abstract: The present invention provides a composition for improving skin conditions, containing the extracellular domain of human bone morphogenetic protein receptor 1a as an active ingredient. The present invention contains the extracellular domain of human bone morphogenetic protein receptor 1a as an active ingredient inside a nanoliposome comprising hydrogenated lecithin as a constituent component, and the particle size is 50-250 nm. The composition of the present invention reduces wrinkles and alleviates atopic dermatitis. In addition, the present invention provides a method for improving skin conditions, comprising the step of administering a composition containing the extracellular domain of human bone morphogenetic protein receptor 1a as an active ingredient to a subject.