中文摘要：

口腔癌的发病率占全身恶性肿瘤的第6位，正确区分正常状态与良性和恶性口腔肿瘤，是恰当选择治疗方案的关键所在。本研究中，首先利用液相色谱－质谱和气相色谱-质谱联用方法分别得到健康人、良性口腔肿瘤患者和恶性门腔肿瘤患哲血浆、尿液和唾液的代谢轮廓，然后应用正交信号校正的偏最小二乘法进行多变量统计分析。结果表明健康人、良性肿瘤患者和恶性肿瘤患者在血浆、尿液和唾液等3种体液代谢中部可以被区分开，而且找到和签定出19个重要差异代谢物，相关代谢通路分析显示，与健康人相比，良性和恶性口腔肿瘤患者都存在能最代谢紊乱和脂类代谢失衡的现象，但恶性口腔肿瘤患者还表现出三羧酸循环和肌醇代谢异常，这为临床诊断及治疗提供了重要信息。

英文摘要：

Oral cancer is the sixth common cancer in the world, and precisely distinguishing health control, benign and malignant oral tumors is important for the proper and timely selection of therapeutic treatment. In the current study, the metabolic profiles of the plasma, urine and saliva of three groups, consisting of malignant oral tumor patients, benign oral tumor patients and healthy controls, were analyzed using liquid chromatography-mass spectrometry and gas chromatography-mass spectrometry. Utilizing a partial least squares-discriminant analysis with orthogonal signal correction data filter, the three groups were discriminated based on their plasma, urine and saliva metabolic profiles. Nineteen differential metabolites were identi- fied including 3 acylcarnitines and 4 lyso-phosphatidylcholines in plasma, 3 amino acids and 2 organic acids in urine, 4 organic acids and 3 other metabolites in saliva. The identified metabolites were studied in the context of the pathways in which they were involved and their biologi- cal activities. The results indicated that benign and malignant oral tumor patients have altered energy metabolism, disordered lipolysis compared with healthy controls. Furthermore malignant oral tumor patients even present a distorted Krebs cycle and inositol metabolism.