Isolation and characterization of biliary epithelial and stromal cells from resected human cholangiocarcinoma: a novel in vitro model to study tumor-stroma interactions

Massani,Marco; Stecca,Tommaso; Fabris,Luca; Caratozzolo,Ezio; Ruffolo,Cesare; Furlanetto,Alberto; Morton,Stuart; Cadamuro,Massimiliano; Strazzabosco,Mario; Bassi,Nicolò

doi:10.3892/or.2013.2568

Isolation and characterization of biliary epithelial and stromal cells from resected human cholangiocarcinoma: a novel in vitro model to study tumor-stroma interactions

Authors:
- Marco Massani
- Tommaso Stecca
- Luca Fabris
- Ezio Caratozzolo
- Cesare Ruffolo
- Alberto Furlanetto
- Stuart Morton
- Massimiliano Cadamuro
- Mario Strazzabosco
- Nicolò Bassi
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Affiliations: IV Department of Surgery, Regional Center for HPB Surgery, Regional Hospital of Treviso, Treviso, Italy, Department of Surgical and Gastroenterological Sciences, University of Padova, Padova, Italy, Department of Pathological Anatomy, Regional Hospital of Treviso, Treviso, Italy, Department of Surgical and Gastroenterological Sciences, University of Milan-Bicocca, Milan, Italy, Department of Medicine and Liver Center, Yale University, New Haven, CT, USA
Published online on: June 26, 2013 https://doi.org/10.3892/or.2013.2568
Pages: 1143-1148

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Abstract

Cholangiocarcinoma (CCA) is a devastating malignancy arising from the bile ducts. Cancer-associated fibroblasts (CAFs) are key players in CCA invasiveness and in the generation of a desmoplastic reaction. The aim of the present study was to develop a novel model by which to study tumor-stroma interactions using primary cultures of human biliary epithelial cells (hBECs) and stromal cells (SCs) in CCA. hBECs and SCs, isolated from surgical resections (n=10), were semi-purified by centrifugation on a Percoll gradient; hBECs were further immunopurified. hBECs and SCs were characterized using epithelial [cytokeratin 7 (CK7) and CK19] and mesenchymal [vimentin (VMN), α-smooth muscle actin (α-SMA), CD68] cell markers. The purity of cultured cells was assessed by fluorescent immunocytochemistry. hBECs were HEA125/CK7/CK19-positive and VMN/α-SMA-negative. SCs were VMN/α-SMA-positive and CK7/CK19-negative. CCA 2-D culture models have been described but they use long-standing CCA cell lines of various biliary tumor cell origins with stromal cells derived from non-cholangiocarcinoma tissues. Recently, a novel 3-D organotypic co-culture model of rat cholangiocarcinoma was described. In the present study, we obtained pure and stable primary cultures of hBECs and SCs from CCA surgical specimens. These cell cultures may provide a useful tool by which to study CCA tumor-stroma interactions.

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