Impact of Fibroblast-Derived SPARC on Invasiveness of Colorectal Cancer Cells

Cancers

Lukas Kenner¹  Andrea Beer¹  Daniel Drev²  Andrea Reti²  Brigitte Marian²  Martin Klimpfinger³  Sabine Thalhammer³  ElisabethS. Gruber⁴  Felix Harpain⁴  Anton Stift⁴  Michael Bergmann⁴ 

[1] Clinical Institute of Pathology, Medical University of Vienna, Währinger Gürtel 18–20, 1090 Vienna, Austria;Department of Medicine 1, Institute of Cancer Research, Medical University of Vienna, Borschkegasse 8a, 1090 Vienna, Austria;Department of Pathology, Social Medical Center South-Kaiser Franz Josef Hospital, Kundratstraβe 3, 1100 Vienna, Austria;Department of Surgery, Division of General Surgery, Medical University of Vienna, Währinger Gürtel 18–20, 1090 Vienna, Austria;

关键词: colorectal cancer;    tumor microenvironment;    cancer-associated fibroblasts;    SPARC;    3D co-culture;   

DOI  :  10.3390/cancers11101421

来源: DOAJ

【 摘 要 】

Secreted protein acidic and rich in cysteine (SPARC) is a matricellular protein modulating cell-matrix interactions and was found up-regulated in tumor stroma. To explore the effect of high stromal SPARC on colorectal cancer (CRC) cell behavior and clinical outcome, this study determined SPARC expression in patients suffering from stage II and III CRC using a publicly available mRNA data set and immunohistochemistry of tissue microarray sections. Moreover, in vitro co-culture models using CRC cell lines together with colon-associated fibroblasts were established to determine the effect of fibroblast-derived SPARC on cancer cells. In 466 patient samples, high SPARC mRNA was associated with a shorter disease-free survival. In 99 patients of the tissue microarray cohort, high stromal SPARC in the primary tumor was an independent predictor of shorter survival in patients with relapse (27 cases; HR = 4574, p = 0.004). In CRC cell lines, SPARC suppressed phosphorylation of focal adhesion kinase and stimulated cell migration. Colon-associated fibroblasts increased migration velocity by 30% and doubled track-length in SPARC-dependent manner. In a 3D co-culture system, fibroblast-derived SPARC enhanced tumor cell invasion. Taken together, stromal SPARC had a pro-metastatic impact in vitro and was a characteristic of aggressive tumors with poor prognosis in CRC patients.

【 授权许可】

Unknown