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采用ＭＴＴ（二甲基噻唑二甲基四唑）法检测外周血单个核细胞（ＰＢＭＣ）对Ｒａｊｉ细胞的杀伤作用和免疫酶法测ＥＢ病毒相关抗体（ＥＢＶＶＣＡ－ＩｇＡ）的免疫阻抑作用，研究益气解毒片对该阻抑作用的解除效应。结果表明，益气解毒片一方面可以直接杀伤Ｒａｊｉ细胞，另一方面有解除ＥＢＶＶＣＡ－ＩｇＡ的封闭作用，使免疫细胞直接杀伤携带ＥＢ病毒基因的Ｒａｊｉ细胞。提示益气解毒片可能解除ＥＢＶＶＣＡ－ＩｇＡ的免疫封闭作用，从而阻断鼻咽癌（ＮＰＣ）高危者向ＮＰＣ的发展。
The killing effect of peripheral blood mononuclear cells (PBMCs) on Raji cells and the immunosuppressive effect of EBVVC-IgA detected by immunoenzymatic method were studied by MTT (dimethyl thiazolyldimethyltetrazole) method. Detoxification tablets of Yiqi detoxification effect of the lifting effect. The results showed that Yiqi Jiedu Tablets can directly kill Raji cells on the one hand, and on the other hand, it can relieve the blocking effect of EBVVCA-IgA, allowing immune cells to directly kill Raji cells carrying the EB virus gene. It is suggested that Yiqijiedu tablets may relieve the immuno-blocking effect of EBVVCA-IgA, thereby blocking the development of NPCs at high risk of nasopharyngeal carcinoma (NPC).