Circulating tumor cells from 4D model have less integrin beta 4 expression.

Autor: Mishra DK; Department of Surgery, Houston Methodist Research Institute, Houston, Texas., Scott KL; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas., Wardwell-Ozgo JM; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas., Thrall MJ; Department of Pathology and Genomic Medicine, Houston Methodist Research Institute, Houston, Texas., Kim MP; Department of Surgery, Houston Methodist Research Institute, Houston, Texas; Department of Surgery, Weill Cornell Medical College, Houston Methodist Hospital, Houston, Texas. Electronic address: mpkim@houstonmethodist.org.
Jazyk: angličtina
Zdroj: The Journal of surgical research [J Surg Res] 2015 Feb; Vol. 193 (2), pp. 745-53. Date of Electronic Publication: 2014 Aug 20.
DOI: 10.1016/j.jss.2014.08.022
Abstrakt: Background: Currently, there is no in vitro or ex vivo model that can isolate circulating tumor cells (CTCs). Recently, we developed a four-dimensional (4D) lung cancer model that allows for the isolation of CTCs. We postulated that these cells have different properties than parental (2D) cells.
Materials and Methods: We obtained CTCs by growing A549, H1299, 393P, and 344SQ cell lines on the 4D lung model. The CTCs were functionally characterized in vitro and gene expression of the cell adhesion molecules was compared with respective 2D cells. Integrin beta 4 (ITGB4) was further investigated by stably transfecting the A549 and H1299 cells.
Results: We found that all cell lines produced CTCs, and that CTCs from the 4D model were less adherent to the plastic and have a slower growth rate than respective 2D cells (P < 0.01). Most of the cell adhesion molecules were downregulated (P < 0.05) in CTCs, and ITGB4 was the common molecule, significantly more underexpressed in CTCs from all cell lines than their respective 2D cells. The modulation of ITGB4 led to a differential function of 2D cells.
Conclusions: CTCs from the 4D model have different transcriptional, translational, and in vitro characteristics than the same cells grown on a petri dish, and these CTCs from the 4D model have the properties of CTCs that are responsible for metastasis.
(Copyright © 2015 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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