formation was purchased from BioChain. All these breast cancer cases were histopathologically re-evaluated on hematoxylin and eosin-stained slides by two pathologists. These breast get 313348-27-5 tissue specimens are anonymous and have institutional IRB exemption. NgBR and Nogo-B Antibody Generation The peptide was used to immunize rabbits. The antiserum was purified using the same peptide-conjugated SulfoLink Coupling Gel. The peptide recognizing epitope 14 to 30 of human Nogo-B was used to immunize rabbits. In addition, 
NgBR rabbit monoclonal antibody also was generated by Epitomics as a collaboration project and was used for Western blot analysis. Immunohistochemistry Association of NgBR with Survivin in Breast Cancer . After 24 hours or/and 48 hours treatment, the total viable cell number was determined using Bio-Rad TC10TM automated cell counter Bio-Rad. Western blot analysis. Total cell lysates were prepared by adding 200 ml of cell lysate buffer containing 20 mM Tris-HCl, pH 7.5, 150 mM NaCl, 1 mM EDTA, 1 mM EGTA, 2.5 mM sodium pyrophosphate, 1 mM Na3VO4, 1 mM phenylmethylsulfonyl fluoride, and 1% Triton X-100, and 1 mg/ml leupeptin. Total cell extract was separated on a 12% SDS-PAGE gel and transferred to a nitrocellulose membrane. Total levels of survivin, ER and NgBR were determined by using specific antibodies, survivin rabbit polyclonal antibody from Novus, ER rabbit monoclonal antibody from Dako and NgBR rabbit monoclonal antibody from Epitomics. Real-time PCR. Survivin and NgBR transcripts in breast cancer were determined by real-time PCR. Normalized breast cancer cDNA arrays, survivin primer and survivin standard were utilized. Total RNA was also isolated from T47D, MDA-MB-468 and MCF-7 cell lines using RNeasy mini plus kit. One mg RNA was used for reverse transcription using iScript cDNA synthesis kit. The forward and reverse primers for NgBR are 59-tgccagttagtagcccagaagcaa-39 and 59-tgatgtgccagggaagaaagccta-39, respectively. The forward and reverse primers for survivin are 59-caaggagctggaaggctg-39 and 59-ttcttggctctttctctgtcc39, respectively. Beta-actin was used as a normalized control. The forward and reverse primers for Beta-actin are 59-ttctacaatgagctgcgtgtggct-39 and 59-tagcacagcctggatagcaacgta-39 respectively. Real-time PCR analysis was performed with Bio-Rad MyiQ detection system. Expression of Nogo-B and NgBR in Normal Breast Tissue As shown in Expression of Nogo-B and NgBR in Invasive Ductal Carcinoma Statistical Analysis Histological data was analyzed using statistical software SPSS 16.0 for Windows. The relationship was tested using Pearson Chisquare tests. A p-value,0.05 defined statistical significance. Quantitative scoring of NgBR and survivin immunostaining, real-time PCR and cell growth data are presented as mean 6 the standard error of the mean and the statistical significance of differences was evaluated with the ANOVA analysis. Significance was defined 24900262 as p,0.05. Correlation of NgBR and Survivin were analyzed using Pearson’s correlation 7910212 coefficient analysis. Results Specificity of Nogo-B and NgBR IHC Staining To confirm the specificity of NgBR and Nogo-B IHC, we performed IHC staining in human IDC tissue sections and used primary antibodies preabsorbed with their corresponding epitope peptide-conjugated beads as negative controls. As shown in Association of NgBR with Survivin in Breast Cancer samples and Stage I ductal adenocarcinoma samples. We also found that expression of NgBR and survivin has statistically signif