Increased type III TGF-β receptor shedding decreases tumorigenesis through induction of epithelial-to-mesenchymal transition.

Journal Article (Journal Article)

The type III TGF-β receptor (TβRIII) is a TGF-β co-receptor that presents ligand to the type II TGF-β receptor to initiate signaling. TβRIII also undergoes ectodomain shedding to release a soluble form (sTβRIII) that can bind ligand, sequestering it away from cell surface receptors. We have previously identified a TβRIII extracellular mutant that has enhanced ectodomain shedding ("super shedding (SS)"-TβRIII-SS). Here, we utilize TβRIII-SS to study the balance of cell surface and soluble TβRIII in the context of lung cancer. We demonstrate that expressing TβRIII-SS in lung cancer cell models induces epithelial-to-mesenchymal transition (EMT) and that these TβRIII-SS (EMT) cells are less migratory, invasive and adhesive and more resistant to gemcitabine. Moreover, TβRIII-SS (EMT) cells exhibit decreased tumorigenicity but increased growth rate in vitro and in vivo. These studies suggest that the balance of cell surface and soluble TβRIII may regulate a dichotomous role for TβRIII during cancer progression.

Full Text

Duke Authors

Cited Authors

  • Huang, JJ; Corona, AL; Dunn, BP; Cai, EM; Prakken, JN; Blobe, GC

Published Date

  • May 2019

Published In

Volume / Issue

  • 38 / 18

Start / End Page

  • 3402 - 3414

PubMed ID

  • 30643193

Pubmed Central ID

  • PMC6586422

Electronic International Standard Serial Number (EISSN)

  • 1476-5594

Digital Object Identifier (DOI)

  • 10.1038/s41388-018-0672-7


  • eng

Conference Location

  • England