생쥐 자궁조직 내 비만세포의 연령별 밀도 및 분포 변화
Age-dependent Changes in Density and Distribution of Mouse Uterine Mast Cells
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Mast cells containing a variety of mediators in their cytoplasmic granules are widely distributed in connective tissues and mucosal surfaces of skin, airways, and guts. Within these tissues, mast cells are involved in the pathophysiological conditions such as inflammation, self-defense, tissue-remodeling, and autoimmunity. In order to understand the functional roles of master cells in the uterus, we histologically examined the distribution and density of uterine mast cells in the different aged mice. Until 6 weeks mast cells were sparsely detected in the uterus. But at 7 weeks after birth, when estrous cycle begins, the number of mast cells within uterine tissues increased dramatically and the increment of mast cell density continued up to 32 weeks-age. After then, uterine glandular tissue degenerated gradually and density of uterine mast cell decreased. Uterine mast cells were mainly found in the myometrium and they were closely associated with smooth muscle cells, fibroblasts, and collagens, which contents were changed according to the uterine development in the myometrium. These results suggest that uterine mast cells could be involved in myometrial contractions mediated by smooth muscle cells and tissue reconstitution or remodeling during estrous cycle and parturition including the various immunological functions
Abstract
Mast cells containing a variety of mediators in their cytoplasmic granules are widely distributed in connective tissues and mucosal surfaces of skin, airways, and guts. Within these tissues, mast cells are involved in the pathophysiological conditions such as inflammation, self-defense, tissue-remodeling, and autoimmunity. In order to understand the functional roles of master cells in the uterus, we histologically examined the distribution and density of uterine mast cells in the different aged mice. Until 6 weeks mast cells were sparsely detected in the uterus. But at 7 weeks after birth, when estrous cycle begins, the number of mast cells within uterine tissues increased dramatically and the increment of mast cell density continued up to 32 weeks-age. After then, uterine glandular tissue degenerated gradually and density of uterine mast cell decreased. Uterine mast cells were mainly found in the myometrium and they were closely associated with smooth muscle cells, fibroblasts, and collagens, which contents were changed according to the uterine development in the myometrium. These results suggest that uterine mast cells could be involved in myometrial contractions mediated by smooth muscle cells and tissue reconstitution or remodeling during estrous cycle and parturition including the various immunological functions
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