AIM: To investigate the influences of microRNA-126 on the curative effect of chemoradiotherapy and radiosensitivity of SGC-7901 cells.METHODS: The patients of gastric cancer (n=60) were selected in this study including 32 males and 28 females with the average age of (51±7) years.All patients received similar chemoradiotherapy strategy.The tissue and blood samples were collected during treatment.The short-term curative effect was evaluated by the Response Evaluation Criteria in Solid Tumors (RECIST), and the patients were divided into sensitive group and insensitive group.The microRNA-126 levels were detected by RT-qPCR.The SGC-7901 cells were maintained in vitro and transfected with microRNA-126 mimic.The plate colony formation assay was used to determine the enhancement effect of microRNA-126 on radiosensitivity of the SGC-7901 cells.The apoptotic rate of the SGC-7901 cells induced by microRNA-126 was analyzed by flow cytometry.RESULTS: According to the RECIST, 28 cases were defined as sensitive patients and 32 cases were the insensitive patients.Compared with the sensitive patients, the microRNA-126 levels both in blood and tissue samples were lowered in the insensitive patients, and the relative fold changes were 0.72±0.04 and 0.48±0.03, respectively (P<0.05).After transfection with microRNA-126 minic, the SF2 and D0 in the SGC-7901 cells were decreased with the SER of 1.74.Furthermore, microRNA-126 induced apoptosis of SGC-7901 cells and enhanced their radiosensitivity.CONCLUSION: The patients with low microRNA-126 level may suffer a poor curative effect of chemoradiotherapy on the gastric cancer.MicroRNA-126 has an enhancement effect on the radiosensitivity to the SGC-7901 cells.

The change of PNA receptors on the surface of thymocytes in protein deficient mice was investigated. After the mice were fed with protein deficient diet, the body weight continuously declined and the thymus gradually a-trophied. Qualitative test of FITC-PNA indicated the number of PNA positive cells was reduced and the fluorescent antibody reaction on the surface of PNA positive cells weakened. Quantitative test of FITC-PNA showed the amount of FITC-PNA coupled on the surface of PNA positive cells was mark- edly decreased as compared with the cotrol (P

We have observed and studied the immune response, ultrastructure and phagocytosis of peritoneal macrophages (M?) of mice in protein deficiency by means of indirect fluorescent antibody test (IFAT), immunoenzymatic staining technique (IEST),fluorescence isothiocyanate antibody (FITC-Ab) quantitative assay, M? phagocytosis test, scanning electron microscopy (SEM) and im-munoelectron microscopy (IEM).The results showed that the body weight of mice was continuously declined after fed protein deficient diet. In the same time fluorescence reaction and enzyme stain on the M? surface was retarded. The amount of FITC-Ab on the M? membrane was decreased. The villi on the M? surface were shortened, the positive rates and positive degree of cells were lowered,the reaction of cell membrane and nuclear membrane was retarded in SEM and IEM.The phagocytic function of M? was inhibited.The results showed that in protein deficiency, the immune reaction, structure and function of peritoneal M? of mice were markedly affected.

Breast cancer is the most common cancer for Chinese women. Early screening is the best way to improve the rates of early diagnosis and early treatment of breast cancer. The peak ages of breast cancer in Chinese women are obviously different from those in the European and American countries. It is imperative to develop a guideline for breast cancer screening that is suitable for Chinese women. Based on the analysis and summary of breast cancer screening data in China, and the latest guidelines and consensus on breast cancer screening in Europe, the United States and East Asia, China Anti-Cancer Association and National Clinical Research Center for Cancer (Tianjin Medical University Cancer Institute and Hospital) has developed a population-based guideline for breast cancer screening in Chinese women. This guideline has provided detailed recommendations on the screening starting age, screening modalities, and screening interval in Chinese women with average risk and high risk of breast cancer, respectively. This article aims to interpret the above guideline, providing references for professionals in breast cancer screening.