American Association for Cancer Research
15417786mcr150354-sup-153882_1_supp_data_3223943_nxnyd0.pptx (277.55 kB)

Supplemental Figure 2b from Proteomic Characterization of Head and Neck Cancer Patient–Derived Xenografts

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posted on 2023-04-03, 16:24 authored by Hua Li, Sarah Wheeler, Yongseok Park, Zhenlin Ju, Sufi M. Thomas, Michele Fichera, Ann M. Egloff, Vivian W. Lui, Umamaheswar Duvvuri, Julie E. Bauman, Gordon B. Mills, Jennifer R. Grandis

Primary HNSCC and PDX jitter plots for data range visualization. 173 primary HNSCC and 12 PDXs are plotted in separate columns by protein. B) 64 proteins expressed at significantly different levels in both primary HNSCC and PDX.



American Cancer Society

Department of Veterans Affairs BLR&D

MDACC CCSG supported core NCI



Despite advances in treatment approaches for head and neck squamous cell carcinoma (HNSCC), survival rates have remained stagnant due to the paucity of preclinical models that accurately reflect the human tumor. Patient-derived xenografts (PDX) are an emerging model system where patient tumors are implanted directly into mice. Increased understanding of the application and limitations of PDXs will facilitate their rational use. Studies to date have not reported protein profiles of PDXs. Therefore, we developed a large cohort of HNSCC PDXs and found that tumor take rate was not influenced by the clinical, pathologic, or processing features. Protein expression profiles, from a subset of the PDXs, were characterized by reverse-phase protein array and the data was compared with The Cancer Genome Atlas HNSCC data. Cluster analysis revealed that HNSCC PDXs were more similar to primary HNSCC than to any other tumor type. Interestingly, while a significant fraction of proteins were expressed similarly in both primary HNSCC and PDXs, a subset of proteins/phosphoproteins were expressed at higher (or lower) levels in PDXs compared with primary HNSCC. These findings indicate that the proteome is generally conserved in PDXs, but mechanisms for both positive and negative model selection and/or differences in the stromal components exist.Implications: Proteomic characterization of HNSCC PDXs demonstrates potential drivers for model selection and provides a framework for improved utilization of this expanding model system. Mol Cancer Res; 14(3); 278–86. ©2015 AACR.

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