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The morbidity and mortality of gastric cancer are high, while the overall therapeutic effect is poor without satisfactory. Clinical obstacles, such as low early-diagnosis rate, tumor heterogeneity, lack of accurate classification and precise treatment, therapeutic resistance, recurrence and metastasis, are the key point issues to the lower efficacy in treatment of gastric cancer. In order to solve these clinical problems, it is necessary to devote more energy to the basic research of gastric cancer, including tumor genomics; gene editing; tumor microenvironment; inflammation, aging and tumor; cell differentiation disorders; autophagy and cell death; metabolic disorders; immunotherapy and drug development. This paper will summarize the clinical obstacles in the treatment of gastric cancer, and describe the directions of basic research on these clinical problems in future, so as to provide notions for the translational research of gastric cancer.

Abstract.: It has been known that oxidative stress plays an important role in the development of diabetic nephropathy (DN). The antioxidative effects of Astragalus saponin I (AS I) were studied in vitro and in vivo. In the presence of high glucose and H2O2, the total antioxidative capability, catalase, reduced glutathione, and superoxide dismutase level of rat mesangial cells were significantly decreased, and transforming growth factor β1 (TGF-β1) mRNA level, collagen IV, and laminin level were significantly increased. When compared with those in the high glucose group, these 4 indexes of cells incubated in 2.0 and/or 20 µmol/L of AS I were significantly enhanced, and levels of TGF-β1 mRNA, collagen IV and laminin were statistically decreased. By flowcytomery, percentages of S phase of cells incubated in high glucose and H2O2 were lowered, while those in AS I were increased. Furthermore, the physical behaviors of rats treated with 12 mg/kg of AS I restored with vigor and weight gaining, while the level of HbAlC was significantly reduced. Thus, AS I has antioxidative effects and is a potential compound worth further study because it may prevent the development of DN. Keywords:: Astragalus saponin I, diabetic nephropathy, antioxidative, mesangial cell