Journal: International Journal of Nanomedicine
Article Title: Transferrin-Functionalized Conjugated Polymer Nanoparticles for Enhanced Photodynamic Therapy of Glioblastoma
doi: 10.2147/IJN.S592688
Figure Lengend Snippet: Integrated in silico and experimental analysis of transferrin receptor 1 (TfR1 / TFRC) expression in gliomas and representative cell lines. Box-plot summary of TFRC mRNA expression obtained from GEPIA (Gene Expression Profiling Interactive Analysis) based on tumor and normal samples from the TCGA and the GTEx databases (accessed March 2025). ( A ) Comparison of TFRC expression in high-grade gliomas (GBM) vs. low-grade glioma (LGG) (n indicated on each plot). ( B ) TFRC expression stratified by canonical GBM molecular subtype (classical, mesenchymal, neural, proneural). Boxes represent the interquartile range, horizontal lines the median, whiskers extend to 1.5×IQR, and individual data points are overlaid. Brackets with asterisks denote statistically significant pairwise differences (see Methods for statistical test). ( C ) TfR1 expression levels in GBM cell lines and HEK293 (non-tumor control). Data taken and adapted from the Human Protein Atlas. ( D ) Representative flow-cytometry histograms of surface TfR1 staining in U87MG, T98G, MO59K and HEK293 cells. Traces correspond to unstained control (red), secondary-only control (anti-mouse IgG–AF647; Orange) and specific anti-CD71 primary staining followed by anti-mouse-AF647 secondary (blue). The horizontal bracket on each histogram indicates the gate used to define TfR1-positive events. ( E ) gMFI of the CD71 signal (mean ± SD; n = biological replicates indicated in Methods), and ( F ) percentage of TfR1-positive cells. Data were normalized to appropriate controls. Statistical comparisons were performed as described in Methods (* p < 0.05 ).
Article Snippet: In addition, representative immunohistochemistry (IHC) images illustrating TfR1 protein expression in human brain tissues were retrieved from the Human Protein Atlas (HPA) database ( https://www.proteinatlas.org ), an open-access resource providing antibody-based protein expression profiles across normal and cancer tissues.
Techniques: In Silico, Expressing, Gene Expression, Comparison, Control, Flow Cytometry, Staining
