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Fine Structural Modification of Mouse Ovarian Tissue by Irradiation of 6 MeV LINAC Radiation  

Yoon, Chul-Ho (Department of Biological Sciences, Graduate School, Dankook University)
Moon, Myung-Jin (Department of Biological Sciences, Graduate School, Dankook University)
Publication Information
Applied Microscopy / v.33, no.2, 2003 , pp. 117-130 More about this Journal
Abstract
This research investigates the fine structural as well as the morphological changes of the mouse ovarian tissue after irradiation of various dose rates of 6 MeV LINAC radiation. The normal structure of the ovarian tissue is consisted of various stages of follicles including primordial and growing follicles, and ovarian stromal connectives. When we observed the ovarian tissues irradiated with a dose rate of 200 cGy/min using light and electron microscopes, granular cells in growing follicles are in irregular shape unlike normal follicles. Small segments of cells scattered in follicular antrum among granular cells. We could observe neutrophils and macrophages around the segments, which means the cells already got in the process of decease owing to the effects radiation. With coincident to the increase of the dose rate of x-ray irradiation as 400 or 600 cGy/min, the mature follicles appeared as an irregular form and the granular cells surrounding oocyte also deformed comparing to their normal counterparts. The granulosa cells within mature follicle are already occurred necrotic change and apoptosis. The nuclei in some cells got so fragmented that the segments formed the shape of a horseshoe or scattered in small and condensed pieces. All the cells at a granular layer irradiated with a dose rate of 600 cGy/min show typical characteristics of apoptosis. The neutrophils involved in inflammatory reaction appear evidently in follicular antrum of growing follicles, and macrophage scattered with residual and apoptotic bodies.
Keywords
Fine structure; Mouse; Ovary; Radiation;
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