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• W2887450478 abstract "Purpose: Tumor microenvironmental (TME) factors play important roles in cancer progression and chemoresistance by inducing epithelial-mesenchymal transition (EMT) and related mechanisms. Pancreatic stellate cell (PSC) is a highly-enriched cell type in TME of pancreatic ductal adenocarcinoma (PDAC). Three dimensional (3D) tumor spheroids (TS) are considered as an in vivo-like tumor model demonstrating its clinical relevancy. We previously developed a minipillar array histochip for 3D culture and immunohistological analysis of TS in an increased throughput manner. Here, we present a minipillar-based co-culture of TS and PSC as a novel in vitro microtumor model of pancreatic ductal adenocarcinoma. Methods: Minipillar chips were obtained from MBD Co. (Cellvitro™ 55Cryo). 3D TS of Panc-1, human PDAC cells and PSCs (Sciencell) were cultured on minipillars and at the bottom of 96 well plates, respectively, as embedded in type I collagen. Changes in expression of extracellular matrix (ECM) and EMT-related factors in TS were assessed by confocal microscopy following cyrosection preparation. Results: Co-culture condition was optimized for the growth of TS, activation of PSC, and their interaction. Expression of EMT markers such as TGF-β1 and vimentin increased in co-cultured TS than mono-cultured TS. ECM remodeling as indicated by increased matrix deposition (collagen I, fibronectin) and fiber organization was observed in TS co-cultured with PSC compared to mono-cultured TS. Upon drug exposure (gemcitabine and paclitaxel), survival advantage was prominent in TS co-cultured with activated PSC. Conclusions: We established 3D model of PDAC by co-culturing TS and PSC using minipillar histochips. EMT-related changes including ECM remodeling and drug resistance were recapitulated in the model. Overall our results indicate usefulness of the present model not only in studying the role of TME factors and their interactions towards tumor progression but also in the evaluation of therapeutic efficacy of drug candidates and combinations. Citation Format: Hyun Ju Hwang, Min-Suk Oh, Seul-Ki Kim, Hyo-Jeong Kuh. 3D co-culture of pancreatic tumor sphroids and stellate cells using minipillar array as a microtumor model of pancreatic ductal adenocarcinoma [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2018; 2018 Apr 14-18; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2018;78(13 Suppl):Abstract nr 2114." @default.
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• W2887450478 date "2018-07-01" @default.
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• W2887450478 title "Abstract 2114: 3D co-culture of pancreatic tumor sphroids and stellate cells using minipillar array as a microtumor model of pancreatic ductal adenocarcinoma" @default.
• W2887450478 doi "https://doi.org/10.1158/1538-7445.am2018-2114" @default.
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