Journal of Radiation Protection and Research
- 제19권1호
- /
- Pages.51-68
- /
- 1994
- /
- 2508-1888(pISSN)
- /
- 2466-2461(eISSN)
방사선 치료후 시간경과에 따른 염색체이상 빈도의 변화
Change of Frequency of Chromosome Aberration by Time Interval after Radiation Therapy
-
Kim, Mi-Sook
(Department of Therapeutic Radiology and Cancer Research Institute, Seoul National University College of Medicine Research Center) ;
- Yi, Chun-Ja (Department of Therapeutic Radiology and Cancer Research Institute, Seoul National University College of Medicine Research Center) ;
- Ha, Sung-Whan (Department of Therapeutic Radiology and Cancer Research Institute, Seoul National University College of Medicine Research Center) ;
- Song, Myung-Jae (Korea Electric Power Corporation) ;
- Kim, Hee-Jeun (Korea Electric Power Corporation)
- 발행 : 1994.06.30
초록
임파구의 염색체이상 빈도로부터 피폭자의 흡수선량을 구하는 방법은 사고로 인해 급성 피폭을 받는 경우 유용하게 사용될 수 있다. 그러나 방사선 피폭 후 시간이 경과함에 따라 불안정 염색체이상을 가진 임파구는 감소하게 된다. 이에 방사선 치료후 시간 경과에 따른 불안정 염색체이상 빈도의 변화를 규명하고자 한다. 전골반에 50.4Gy의 방사선 치료를 받은 총 20명의 자궁경부암 또는 자궁내막암 환자를 대상으로 41개의 검체를 얻었다. 채혈의 시기는 방사선 치료후 1일 3주, 6주, 9주, 12주, 24주, 52주, 104주, 156주, 208주, 520주로 하였다. 이들 말초혈액의 임파구에 대해 전혈미세배양을 실시한 후 임파구의 불안정 염색체이상을 관찰하여 Ydr, Qdr, Qdra를 얻었다. Ydr 값은 방사선 치료가 끝난 직후부터 3주까지 plateau를 보였고 이후 감소하는 경향이었다. Ydr의 평균값은 치료후 3주에 0.29에서 급격히 감소하여 2년 후 0.05로 감소하였으며 이후 5년까지 서서히 감소하였다. 회귀분석을 실시한바
It is good method to use frequency of chromosome aberration in Lymphocytes for a biological dosimetry in cases of accidental exposure to radiation. But in cases of past exposure, biological dosimetry is limited because the frequency of aberration decreases by time after exposure. To provide a basic data for estimation of past radiation exposure, the changing pattern of frequency of unstable chromosome aberration by time interval after exposure was studied. Observation was made on peripheral lymphocytes of 41 blood samples from 20 patients treated for uterine cervical carcinoma and endometrial carcinoma. The patients received 50.4Gy radiation to whole pelvis. Elapsed times after the completion of radiation therapy were 1 day, 3, 6, 9, 12, 24, 52, 104, 156, 208, 260 and 520 weeks. All the blood sample were microcultured. The Ydr, Qdr and Qdra were calculated from frequency of unstable aberration. Ydr did not decrease for 3 weeks after radiation therapy, and thereafter, decreased very rapidly and reached 0.05 at two years after radiation therapy and decreased very slowly until 5 years after radiation therapy. Relationship between unstable chromosome aberration and time interval after radiation therapy was described as