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The Effect of Low Dose Radiation on the Neuronal Cell Proliferation in Diabetic Rats  

Kim Doo Soon (Departments of Radiation Oncology, Medical College, Kyunghee University)
Kang Jin Oh (Departments of Radiation Oncology, Medical College, Kyunghee University)
Hong Seong Eon (Departments of Radiation Oncology, Medical College, Kyunghee University)
Kim Sang Ki (Departments of Radiation Oncology, Medical College, Kyunghee University)
Lee Taeck-Hyun (Departments of Physiology, Medical College, Kyunghee University)
Kim Chang-Ju (Departments of Physiology, Medical College, Kyunghee University)
Publication Information
Radiation Oncology Journal / v.23, no.3, 2005 , pp. 157-160 More about this Journal
Abstract
Purpose: To investigate the effect of low dose radiation on neuronal cell proliferation In diabetic rats. Materials and Methods: A group of rats (first group) were divided into three subgroups (nondiabetic control, nondiabetic 0.1 Gy and nondiabetic 10 Gy groups) to determine the effect of radiation on normal hippocampal neuronal ceil proliferation. A further group of rats (second group) were divided into six subgroups (nondiabetic control, diabetic control, diabetic 0.01 Gy, diabetic 0.1 Gy, diabetic 1 Gy and diabetic 10 Gy groups) to determine the effect of radiation on hippocampal neuronal cell proliferation under diabetic conditions. Using immuno-histochemistry for 5-bromo-2'-deoxyuridine (BrdU), the number of neuronal cells in the dentate gyrus of all the groups was counted. Results: The number of BrdU-positive cells in the dentate Gyrus of the nondiabetic control, nondiabetic 0.1 Gy and nondiabetic 10 Gy subgroups of the first group were $45.95{\pm}3.42,\;59.34{\pm}5.20\;and\;19.26{\pm}2.98/mm^2$, respectively. The number of BrdU-positive cells in the dentate gyrus of the diabetic control, diabetic 0.01 Gy, diabetic 0,1 Gy, diabetic 1 Gy and diabetic 10 Gy subgroups of the second group were $55.44{\pm}8.57,\;33.33{\pm}6.46,\;67.75{\pm}10.54,\;66.63{\pm}10.05,\;23.59{\pm}6.37\;and\;14.34{\pm}7.22/mm^2$, respectively. Conclusion: Low dose radiation enhances cell proliferation in the dentate gyrus of STZ-induced diabetic rats.
Keywords
Radiation; Hippocampus; Neuronal cell;
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