目的 探讨益气解毒颗粒对鼻咽癌移植瘤微环境中调节性T细胞（Treg）主导的免疫耐受的影响，及其与顺铂联合应用的体内抗肿瘤效应。方法 采用肿瘤细胞CNE₂制备鼻咽癌移植瘤裸鼠模型，观察益气解毒颗粒单用或与顺铂联合使用在体内的抑瘤效应，检测转录因子叉头翼状螺旋转录因子（Foxp3）和维甲酸依赖性孤核受体γ（ROR-γt）蛋白表达水平和荷瘤裸鼠血清中IFN-γ、TGF-β、IL-17等的水平。结果 益气解毒颗粒组和联合治疗组的荷瘤裸鼠血清中TGF-β和IL-17水平明显低于模型组，IFN-γ水平明显高于模型组和顺铂组，凋亡率明显高于模型组，Foxp3蛋白表达明显升高，ROR-γt蛋白表达明显下降，其中联合治疗组明显优于各药单用组（P<0.01）。结论 益气解毒颗粒能有效调节小鼠Treg/Th17的平衡，恢复Treg的功能，增强小鼠化疗期间T细胞的免疫功能，产生抑癌效应，联合顺铂可减轻化疗毒性。

Objective To investigate the immune tolerance of Qi-Boosting Toxin-Resolving Granules (QBTRF) to Treg in the micro-environment of nasopharyngeal carcinoma (NPC) transplanted tumor, and reveal the possible anti-tumor mechanism of traditional Chinese medicine. Methods Using tumor cells CNE2 to build grafted tumor models, the anti-tumor effect of the QBTRF and cisplatin was observed, and the protein expression levels of Foxp3, ROR-γt and the content of IFN-γ, TGF-β and IL-17 in serum were detected. Results It was found that the content of TGF-β and IL-17 in serum of the tumor granule group and the combination therapy group were significantly lower than the model group, the IFN-γ content was obviously higher than that of the model group and cisplatin group, the apoptotic rate was significantly higher than that of the model group, the protein expression of Foxp3 was significantly increased, and the expression of ROR-γt was obviously decreased, in which the combination group was obviously better than that of single-use groups (P < 0.01). Conclusion QBTRF can effectively regulate the balance of Treg/Th17 in mice, restore the function of Treg, enhance the immune function of T cells during chemotherapy in mice, and exert anticancer effect. Combined with cisplatin, it can reduce the toxicity of chemotherapy.

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国家自然科学基金资助项目（81573721）；国家自然科学基金资助项目（81874408）；湖南省自然科学基金资助项目（2016JJ6117）；湖南省自然科学基金资助项目（2017JJ3246）