Objective To study a gastric carcinoma subcell line with higher invasive potential and its biologic characteristics screened by a transwell chamber. Methods Transwell chamber was used for the selection of tumor subline. The biological characteristics of the cell lines were studied with optics microscope, Westem blotting, Transwell, immunohistochemical staining and growth curve. Results A gastric carcinoma cell subcell line (named MKN-28S10) was established from its parent cell line MKN-28 with higher invasive potential. MKN-28S10 showed essentially the same morphous as MKN-28. The expression of E-cadherin and TIMP-1 decreased significantly in the screened subcell line(P<0.05). The expression of NM23-H1 in MKN-28S10 was significantly lower than that in MKN-28 (P<0.05). Compared with MKN-28 (61.75±2.06 per vision), the migrative ability of passing through the membrane Millipore(100.25±0.50 per vision) was obviously increased in MKN-28S10(P<0.05). Compared with MKN-28, the growth rate of MKN-28S10 was increased obviously. Conclusion MKN-28S10 cell has stronger invasive ability and more powerful proliferation than that of its mother line MKN-28.

Objective:To explore the value of Automated Breast Volume Scanner (ABVS) in evaluating the response of neoadjuvant chemotherapy(NACT) for different molecular subtypes of breast cancer.Methods:Based on immunohistochemical technique, breast cancer was divided into three molecular subtypes according to the negative or positive results of estrogen receptor (ER), progesterone receptor (PR) and proto oncogene human epidermal growth factor receptor 2 (HER2), namely luminal group [ER(+ ) or PR(+ ), and HER2(-/+ )], triple-negative group [ER(-), PR(-) and HER2(-)], HER2 group [ER(-), PR(-)and HER2(+ )]. ABVS was used to analyze the changes of tumor size related parameters in 78 breast cancer patients with three subtypes during NACT.Results:After NACT, the size , area and volume of primary lesion diminished obviously ( P<0.05). 19 cases achieved complete response and 40 cases achieved partial response according to response evaluation criteria in solid tumors (RECIST). After the end of the second cycle of NACT, the primary tumor shrank significantly in HER2 group, and luminal and tri-negative groups were significantly reduced after the end of the third cycle. Conclusions:ABVS has a good value in evaluating the efficacy for different molecular substypes of NACT in breast cancer.