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目的：探讨淋巴细胞预先接受低剂量电离辐射后，对大剂量照射的适应性反应。方法：用０．０４８Ｇｙ γ－ 射线照射后接受０．５～８ ．０Ｇｙ 攻击剂量照射，以３Ｈ－ ＴｄＲ掺入法观察淋巴细胞ＤＮＡ合成能力的变化。结果：淋巴细胞接受低剂量照射时能提高被大剂量照射的ＤＮＡ合成能力，４．０Ｇｙ 的照射时适应性反应最充分。结论：低剂量辐射能诱导淋巴细胞对大剂量辐射的适应性反应。
Objective: To investigate the adaptive response of lymphocytes to high doses of radiation after pre-exposure to low doses of ionizing radiation. Methods: After receiving 0.048Gy γ-ray, 0.5 ~ 8 was received. 0Gy exposure dose irradiation, incorporation of 3H-TdR lymphocyte DNA synthesis observed changes. RESULTS: Lymphocytes were able to increase the DNA synthesis ability of high-dose irradiation when exposed to low doses of radiation, and the most adaptive response was achieved at 4.0 Gy irradiation. Conclusion: Low dose radiation can induce adaptive response of lymphocytes to high dose radiation.