Antitumor effect of SSHE in the peritoneal dissemination model of Panc02 cells

the corresponding paraffin blocks. Using a biopsy needle, a 3-mm tissue core in the selected area was punched out and placed onto a 6 5 recipient block. Two tissue cores were extracted to minimize extraction bias. Each tissue core was assigned a unique tissue microarray location number that was linked to a database containing other 1702259-66-2 clinicopathologic data. 2 / 13 Lipid Metabolism in Metastatic Breast Cancer Immunohistochemistry The antibodies used for IHC in this study are shown in Interpretation of immunohistochemical results A cut-off value of 1% or higher positively-staining nuclei was used to define ER- and AR-positivity. HER-2 staining was analyzed according to the American Society of Clinical Oncology /College of American Pathologists guidelines using the following categories: 0 = no immunostaining; 1+ = weak incomplete membranous staining, less than 10% of tumor cells; 2+ = complete membranous staining, either uniform or weak in at least 10% of tumor cells; and 3+ = uniform intense membranous staining in at least 30% of tumor cells. HER-2 staining was considered positive when strong membranous staining was observed, whereas it was considered negative when no or weak staining was noted. The status of all immunohistochemical markers was determined using light microscopy to assess fractions of stained cells. HSL, PLIN1, FABP4, CPT-1A, ACOX1, and fatty acid synthase immunostaining were scored as the product of the proportion of stained cells and staining intensity. A total score of 26 was considered positive, while a score of 0 or 1 was considered negative. Tumor phenotype classification In this study, breast cancer phenotypes were classified according to IHC results for ER, PR, HER-2, and Ki-67, as well as FISH results for HER-2 as follows: luminal PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/19731547 A type: ER and/or PR PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/19731037 positive, HER-2 negative, and Ki-67 LI <14%; luminal B type: ER and/or PR positive, HER-2 negative, and Ki-67 LI 14%, or ER and/or PR positive and HER-2 overexpressing and/or amplified; HER-2 type: ER and PR negative and HER-2 3 / 13 Lipid Metabolism in Metastatic Breast Cancer overexpressing and/or amplified; and triple negative breast cancer type: ER, PR, and HER-2 negative. Statistical analysis Data were statistically processed using SPSS for Windows, version 12.0. Correlation analysis of immunostaining results between primary breast cancer and metastatic breast cancer was calculated by the McNemar test. Student's t- and Fisher's exact tests were used to examine any differences in continuous and categorical variables, respectively. Corrected p-values and the Bonferroni method were used for multiple comparisons. Statistical significance was assumed when P <0.05. Kaplan-Meier survival curves and log-rank statistics were employed to evaluate time to tumor metastasis and time to survival. Multivariate regression analysis was performed using a Cox proportional hazards model. Results Baseline characteristics of patients The baseline clinicopathologic characteristics of patients are summarized in p-value was calculated by student's t-test. p-value was calculated by Fisher's exact test. doi:10.1371/journal.pone.0137204.t002 4 / 13 Lipid Metabolism in Metastatic Breast Cancer p-value was calculated by Fisher's exact test. doi:10.1371/journal.pone.0137204.t003 metastasis, while the rate of TNBC tumors was significantly higher in lung metastasis. Expression of lipid metabolism-related proteins in breast cancer metastasis according to metastatic site The expression of metaboli