TGF-β-induced stromal CYR61 promotes resistance to gemcitabine in pancreatic ductal adenocarcinoma through downregulation of the nucleoside transporters hENT1 and hCNT3

被引：83

作者：

Hesler, Rachel A. ^{[1
]}

Huang, Jennifer J. ^{[1
]}

Starr, Mark D. ^{[2
]}

Treboschi, Victoria M. ^{[2
]}

Bernanke, Alyssa G. ^{[2
]}

Nixon, Andrew B. ^{[2
]}

McCall, Shannon J. ^{[3
]}

White, Rebekah R. ^{[4
]}

Blobe, Gerard C. ^{[1
,2
]}

机构：

[1] Duke Univ, Dept Pharmacol & Canc Biol, B354 LSRC Res Dr,Box 91004, Durham, NC 27708 USA

[2] Duke Univ, Dept Med, Dept Med Oncol, Durham, NC 27708 USA

[3] Duke Univ, Dept Pathol, Durham, NC 27708 USA

[4] Duke Univ, Dept Surg, Durham, NC 27708 USA

来源：

CARCINOGENESIS | 2016年 / 37卷 / 11期

基金：

美国国家卫生研究院;

关键词：

NF-KAPPA-B; RIBONUCLEOTIDE REDUCTASE M1; MESENCHYMAL TRANSITION; DESMOPLASTIC REACTION; CONFERS RESISTANCE; PREDICT SURVIVAL; CANCER CELLS; EXPRESSION; FAMILY; TUMOR;

D O I：

10.1093/carcin/bgw093

中图分类号：

R73 [肿瘤学];

学科分类号：

100214 ;

摘要：

Pancreatic ductal adenocarcinoma (PDAC) is a lethal cancer in part due to inherent resistance to chemotherapy, including the first-line drug gemcitabine. Although low expression of the nucleoside transporters hENT1 and hCNT3 that mediate cellular uptake of gemcitabine has been linked to gemcitabine resistance, the mechanisms regulating their expression in the PDAC tumor microenvironment are largely unknown. Here, we report that the matricellular protein cysteine-rich angiogenic inducer 61 (CYR61) negatively regulates the nucleoside transporters hENT1 and hCNT3. CRISPR/Cas9-mediated knockout of CYR61 increased expression of hENT1 and hCNT3, increased cellular uptake of gemcitabine and sensitized PDAC cells to gemcitabine-induced apoptosis. In PDAC patient samples, expression of hENT1 and hCNT3 negatively correlates with expression of CYR61. We demonstrate that stromal pancreatic stellate cells (PSCs) are a source of CYR61 within the PDAC tumor microenvironment. Transforming growth factor-beta (TGF-beta) induces the expression of CYR61 in PSCs through canonical TGF-beta-ALK5-Smad2/3 signaling. Activation of TGF-beta signaling or expression of CYR61 in PSCs promotes resistance to gemcitabine in PDAC cells in an in vitro co-culture assay. Our results identify CYR61 as a TGF-beta-induced stromal-derived factor that regulates gemcitabine sensitivity in PDAC and suggest that targeting CYR61 may improve chemotherapy response in PDAC patients.

引用

页码：1041 / 1051

页数：11

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