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That is relatively over-expressed at the tumor periphery. These graphical representations of gene expression data compare the relative expression of galectin-1 from the core and edge of tumors to pooled data from normal mouse brain samples. (Graphics from GeneSpringW).created. To ensure that galectin-1 over-expression would not enhance proliferation of the U87MG line (and hence alter the interpret
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Rbance values of the other wells. Average corrected absorbance was compared between transfectant and parental cells, using a t-test.ECM attachment assaysThe U87MG human glioma cell line was kept in tissue culture in DMEM (Cellgro Mediatech, Inc.), with 10 fetal bovine serum, and penicillin/streptomycin. For transfection, 2.5x106 cells were plated overnight on a 100 mm round dish. Cells were trans
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S independently with similar results. Statistical significance was determined by one-way ANOVA followed by Bonferroni's post hoc analysis for multiple comparisons. *Significantly different compared with PBStreated control (P
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On problem with IRES vectors ?inability to transcribe the transcript following the IRES sequence if the first MCS is empty. The new pIRES2-acGFP1acGFP1 vector was used as a control for the pIRES2Gal1-acGFP1 construct. Both vectors were sequenced through their multiple cloning sites to ensure no PCRinduced mutations were present.Transfection and stable clone generationParental, control, and galecti
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Cal significance.Paraffin sections of our patient-derived glioblastoma xenografts (15 of 22 lines) were stained for galectin-1 expression. Around half of the xenografts tested showed preferential staining at the tumor-brain interface (Figure 3). A few tumors stained in their entirety, and another subset lacked significant staining. The 2 to 4 fold change in galectin-1 mRNA expression at the tumor
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Radial migration assay was performed as previously described [30,31]. In a blinded fashion, various U87Gal-1 clones were analyzed and compared to U87GFP controls and parental U87MG cells. Of each clone, 2500 cells were allowed to sediment through a cooled manifold onto laminin-coated cell culture wells (Creative Scientific Methods, Inc., Phoenix, AZ). The manifold and slide were incubated together
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Orithm. Galectin-1 was ranked at the top of this list. We thus took advantage of our own patient-derived glioblastoma xenograft model [25] in order to further decipher the roles of galectin-1 on GBM cell migration features. The system we have developed mitigates the effect of three important confounders from human samples. First, tissue is frozen within one minute of removal, ensuring high quality
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On problem with IRES vectors ?inability to transcribe the transcript following the IRES sequence if the first MCS is empty. The new pIRES2-acGFP1acGFP1 vector was used as a control for the pIRES2Gal1-acGFP1 construct. Both vectors were sequenced through their multiple cloning sites to ensure no PCRinduced mutations were present.Transfection and stable clone generationParental, control, and galecti