Journal of Biomedical Science

, 14:395

Expression of EIF3-p48/INT6, TID1 and Patched in cancer, a profiling of multiple tumor types and correlation of expression


    • 20/20 GeneSystems, Inc.
    • Science Applications International Corporation
  • Joon-Yong Chung
    • Tissue Array Research Program, Laboratory of PathologyNational Cancer Institute
    • PharmacoGenomics Research Center and Molecular Cell Physiology Research GroupInje University College of Medicine
  • Till Braunschweig
    • Tissue Array Research Program, Laboratory of PathologyNational Cancer Institute
  • Ilya Mazo
    • Ariadne Genomics, Inc.
  • Youmin Shu
    • GeneHarbor, Inc.
  • Arun Ramesh
    • 20/20 GeneSystems, Inc.
  • Mark W. D’Amico
    • 20/20 GeneSystems, Inc.
  • Mikhail M. Galperin
    • 20/20 GeneSystems, Inc.
  • Vladimir Knezevic
    • 20/20 GeneSystems, Inc.
  • Stephen M. Hewitt
    • Tissue Array Research Program, Laboratory of PathologyNational Cancer Institute

DOI: 10.1007/s11373-007-9149-3

Cite this article as:
Traicoff, J.L., Chung, J., Braunschweig, T. et al. J Biomed Sci (2007) 14: 395. doi:10.1007/s11373-007-9149-3


Alterations in eIF3-p48/INT6 gene expression have been implicated in murine and human mammary carcinogenesis. We examined levels of INT6 protein in human tumors and determined that breast and colon tumors clustered into distinct groups based on levels of INT6 expression and clinicopathological variables. We performed multiplex tissue immunoblotting of breast, colon, lung, and ovarian tumor tissues and found that INT6 protein levels positively correlated with those of TID1, Patched, p53, c-Jun, and phosphorylated-c-Jun proteins in a tissue-specific manner. INT6 and TID1 showed significant positive correlation in all tissue types tested. These findings were confirmed by immunohistochemical staining of INT6 and TID1. Further evidence supporting a cooperative role for INT6 and TID1 is the presence of endogenous INT6 and TID1 proteins as complexes. We detected co-immunoprecipitation between INT6 and TID1, as well as between INT6 and Patched. These findings suggest potential integrated roles for INT6, TID1, and Patched proteins in cell growth, development, and tumorigenesis. Additionally, these data suggest that the combination of INT6, TID1, and Patched protein levels may be useful biomarkers for the development of diagnostic assays.


INT6layered expression scanningMLWesternmultiplex tissue immunoblottingPatchedTID1

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© National Science Council Taipei 2007