Difference of TGF-β/Smads signaling pathway in epithelial-mesenchymal transition of normal colonic epithelial cells induced by tumor-associated fibroblasts and colon cancer cells.

Abstract:

:Tumor microenvironment (TME) crucially functions in tumor initiation and progression. Stroma-tumor interactions and cellular transdifferentiation are the prerequisite for tumor formation. Transforming growth factor-β (TGF-β), a major cytokine secreted by tumor-associated fibroblasts (TAFs) and cancer cells, is a crucial player involving cell transdifferentiation. Therefore, we hypothesized that these TAFs and cancer cells also affect normal colon epithelium. In our study, we found for the first time that colon cancer cells HCT116 and TAF-like CCD-18Co cells induced epithelial-mesenchymal transition (EMT)-like transdifferentiation in colon epithelial cells HCoEpiCs, with enhanced migratio. Dysfunction of TGF-β/Smads signal was also observed in the EMT-transformed HCoEpiCs. We wondered whether these phenomena were regulated by TGF-β/Smads signaling pathway. A TGFβ receptor kinase I (TβRI) inhibitor LY364947 was used. We found that the EMT induced by the HCT116- and CCD-18Co-derived CM was suppressed by the LY364947. Besides, different expression profiles for the components of TGF-β/Smads pathway were found in the EMT-like HCoEpiCs, but high expression of p-Smad2/3 and Smad4 was the common feature. Our observations suggest that the mechanisms of phenotypic transition of colon epithelial cells are cellular environment-dependent, which maybe a basis of potential therapy targeting TME.

journal_name

Mol Biol Rep

authors

Wang XL,Huang C

doi

10.1007/s11033-019-04719-5

subject

Has Abstract

pub_date

2019-06-01 00:00:00

pages

2749-2759

issue

3

eissn

0301-4851

issn

1573-4978

pii

10.1007/s11033-019-04719-5

journal_volume

46

pub_type

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