Objective To investigate the expression of proliferating cell nuclear antigen ( PCNA) and the level of 8-hydroxydeoxyguanosine (8-OhdG) in gastric carcinoma and their clinical significance. Methods PCNA protein expression of 63 tumor tissues , 36 paracancerous tissues and 9 chronic gastritis mucosa were ana-lyzed by immunohistochemistry and 8-O HdG of hydrolysates was determined by HPLC. Results The expression of PCNA and the level of 8-OHdG were upregulated in chronic gastrits mucosa adjacent tissues and gastric carci-noma raised gradually and these two metrics were associated with tumor differentiation and TNM stage. Conclu-sions Up-regulation of PCNA protein expression and 8-O HdG levels are observed in gastric carcinoma. Detec-tion of PCNA protein expression and 8-O HdG levels can be used to evaluate malignant biological behavior and prognosis of gastric cancer.

Objective To study the correlation of the serum insulin-like growth factor-1(IGF-1) level and the radioactive iodine uptake rate in patients with nodular goiter,to explore a simple and saftymethods of identifying different kinds of thyroid nodule.Methods Sixty diagnosed cases was selected intohot nodule group(30 cases)and cool nodule group(30 cases),and 30 healthy people were selected into thehealthy control group.Measured the IGF-1,FT3,FT4,TSH level of each group by radioimmunoassay,and measured the radioactive iodine uptake rate by radionuclear technique.Results To compare with healthy control group,the levels of serum IGF-1,FT3,FT4 and the radioactive iodine uptake rate of hot nodule group were increased obviously,but the serum TSH was decreased significantly,and the level of IGF-1 had positive correhtion with the radioactive iodine uptake rate(r=0.835)in the same group.Meanwhile,the 1 evel of IGF-1 had negative correlation with the level of TSH(r=-0.326).In cool nodule group,the levels of serum IGF-1,FT3,FT4,TSH had no significant difference oompared with healthy control group(P>0.05).Conclusion The level of IGF-1 and radioactive iodine uptake rate in patients with nodular goiter has certain correlation.