THE EFFECT OF LOCAL RADIOTHERAPY ON T LYMPHOCYTE SUBSETS OF CANCER PATIENT

ＴＨＥＥＦＦＥＣＴＯＦＬＯＣＡＬＲＡＤＩＯＴＨＥＲＡＰＹＯＮＴＬＹＭＰＨＯＣＹＴＥＳＵＢＳＥＴＳＯＦＣＡＮＣＥＲＰＡＴＩＥＮＴ￥ＭａＨｕｉｍｉｎ；马惠民；ＺｈａｎｇＳｈａｎｗｅｎ；张珊文（ＤｅｐａｒｔｍｅｎｔｏｆＲａｄｉｏｔｈｅｒａｐｙ，Ｂｅｉｊｉｎ...

The effect of local radiotherapy on T lymphocyte subsets of cancer patient

In the study,we utilized the OKT monoclonal antihuman T Iymphocyte antibodies by indirect immunoenzyme staining method to determinc T lymphocyte subsets in the peripheral blood of 72 cancer patients treated by local radiotherapy.The haematological assays were performed immediately Pre-and Postradiotherapy.In the postoperative radiotherapy group(PR group) of 40 breast cancer patients treated by prophylactic postoperative radiotherapy,after radiotherapy blood platelet,white blood cell and lymphocyte count decreased significantly.CD2,CD4 and CD8 cell counts all very significantly decreased.Proportion of CD2 and CD2 had no apparent change but proportion of CD8 increased significantly.The group appeared apparent hypoimmunity.While the complete response group(CR group) of 32 cancer paticnts treateil with local radiothcrapy,after radiotherapy blood Platelet,white blood cell and lymphocyte count had no significant decrease.CD2,CD4 and CD8 cell count had no significant decrease.Proportion of CD2,CD4 and CD8 had no apparent change.The CR group had no apparent hypoimmunity.Comparing decrease rate of immunologic parameters in these two groups,decrease rate of white blood cell,lympheeyte and T lymphocyte subsets count in CR group significantly were slightened rather than pR group.This study proved that effect of radiation-damaging tumor cell enhance antigenicity of the tumor and stimulate host cell immunity including a type of T-lymphogenesis.Induced hypoimmunity by postoperative radiotherapy should be avoided in this point of view.