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

당뇨병 유발 쥐에서 신경 세포 증식에 대한 저선량 방사선의 효과

  • 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)
  • 김두순 (경희대학교 의과대학 방사선종양학교실) ;
  • 강진오 (경희대학교 의과대학 방사선종양학교실) ;
  • 홍성언 (경희대학교 의과대학 방사선종양학교실) ;
  • 김상기 (경희대학교 의과대학 방사선종양학교실) ;
  • 이택현 (경희대학교 의과대학 생리학교실) ;
  • 김창주 (경희대학교 의과대학 생리학교실)
  • Published : 2005.09.01

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.

목적: 저선량 방사선이 당뇨쥐의 해마에서 신경 세포의 증식에 미치는 영향을 확인하기 위해서이다. 대상 및 방법: 정상 쥐를 대상으로 방사선을 조사하지 않은 군, 0.1 Gy 방사선 조사군, 10 Gy 방사선 조사군으로 나눠 방사선이 정상 신경 세포의 증식에 미치는 영향을 확인하였다. 당뇨쥐를 대상으로 한 이차 실험은 방사선을 조사하지 않은 정상 쥐, 방사선을 조사하지 않은 당뇨쥐, 0.01 Gy 방사선 조사한 당뇨쥐, 0.1 Gy를 조사한 당뇨쥐, 1 Gy를 조사한 당뇨쥐, 10 Gy를 조사한 당뇨쥐로 나눠 시행하였다. 5-bromo-2'-deoxyuridine (BrdU)를 이용한 면역 염색을 시행하여 쥐 해마의 치아이랑 세포의 수를 세어 비교하였다. 결과: BrdU 양성 세포의 수는 대상으로 방사선을 조사하지 않은 정상쥐, 0.1 Gy 방사선 조사한 정상쥐, 10 Gy 방사선 조사한 정상쥐에서 각각 $45.95{\pm}3.42/mm^2,\;59.34{\pm}5.20/mm^2,\;19.26{\pm}2.98/mm^2$로 나타났다. 당뇨쥐를 대상으로 한 이차 실험에서 BrdU 양성 세포의 수는 방사선을 조사하지 않은 정상 쥐, 방사선을 조사하지 않은 당뇨쥐, 0.01 Gy 방사선 조사한 당뇨쥐, 0.1 Gy를 조사한 당뇨쥐, 1 Gy를 조사한 당뇨쥐, 10 Gy를 조사한 당뇨쥐에서 각각 $55.44{\pm}8.57/mm^2,\;33.33{\pm}6.46/mm^2,\;67.75{\pm}10.54/mm^2,\;66.63{\pm}10.05/mm^2,\;23.59{\pm}6.37/mm^2,\;14.34{\pm}7.22/mm^2$로 나타났다. 결론: 0.1 Gy 이하의 저선량 방사선은 당뇨쥐의 해마 치아이랑세포의 수를 증가시켜 세포 증식효과를 보이는 것을 확인하였다.

Keywords

References

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