(1.School of Physical Education,Huaibei Normal University,Huaibei 235000,China;2.Laboratory of Laser Sports Medicine,School of Physical Education,South China Normal University,Guangzhou 510006,China) Abstract: In order to probed into the mechanism of exercise intervention on type 2 diabetes mellitus (DM) rats based on serum metabonomics and quantitative difference, the authors divided Sprague Dawley rats into a normal control group (NC), a DM control group (DMC) and a DM exercise group (DME), fed the rats in groups DMC and DME with high-sugar high-fat feed for 4 weeks, and intraperitoneally injected them with streptozotocin at a dose of 40 mg/kg body weight for 1 week in order to stabilize model establishment, implemented swimming intervention on the rats in group DME for 8 weeks, carried out a metabonomic analysis on the serum of the rats in different groups by using ultra performance liquid chromatography coupled with time-of-flight mass spectrometry (UPLC/Q-TOF MS), screened biomarkers acquired from the metabonomic analysis by utilizing quantitative difference, and revealed the following findings: 1) there was a clear separation of serum metabolic profile of the rats in groups DME, DMC and NC, indicat-ing that there was a significant change in serum metabolic profile between the rats in group DME and the rats in groups DMC and NC; 2) between the rats in groups DMC and NC, there was a significant quantitative difference in Arginine, Proline betaine, Eicosapentaenoic acid, Linolenic acid, Propionyl-L-carnitine, MG(24:6), Carnitine, Sphingos-ine-1-phosphate, Gluconic acid and PE(20:3)(l>0.80), except MG(24:6) and PE(20:3) were completely recovered after 8-week exercise intervention(l<0.47). The said findings indicate the followings: 1) swimming training can fully rehabilitate type 2 DM rats; 2) polyunsaturated fatty acid and arginine metabolism are hopefully to become new targets of study of the mechanism of exercise intervention on type 2 DM in the future. Key words: sports medicine;type 2 diabetes mellitus;exercise intervention;metabonomics;quantitative difference;rat |