Secreted protein acidic and rich in cysteine (SPARC) induces epithelial-mesenchymal transition, enhancing migration and invasion, and is associated with high Gleason score in prostate cancer.
- Author:
Fernanda LÓPEZ-MONCADA
1
;
María José TORRES
1
;
Enrique A CASTELLÓN
1
;
Héctor R CONTRERAS
1
Author Information
- Publication Type:Research Support, Non-U.S. Gov't
- Keywords: epithelial-mesenchymal transition; invasion; migration; prostate cancer; secreted protein acidic and rich in cysteine (SPARC)
- MeSH: Blotting, Western; Cell Line, Tumor; Epithelial-Mesenchymal Transition; Humans; Male; Neoplasm Grading; Neoplasm Invasiveness; Osteonectin/metabolism*; Prostatic Neoplasms/pathology*; Tissue Array Analysis
- From: Asian Journal of Andrology 2019;21(6):557-564
- CountryChina
- Language:English
- Abstract: Secreted protein acidic and rich in cysteine (SPARC) is a matricellular protein highly expressed in bone tissue that acts as a chemoattractant factor promoting the arrival of prostate cancer (PCa) cells to the bone marrow. However, the contribution of SPARC during the early stages of tumor progression remains unclear. In this study, we show that SPARC is highly expressed in PCa tissues with a higher Gleason score. Through stable knockdown and overexpression of SPARC in PC3 and LNCaP cells, respectively, here we demonstrate that endogenous SPARC induces the epithelial-mesenchymal transition (EMT), decreasing E-cadherin and cytokeratin 18 and increasing N-cadherin and vimentin. Moreover, SPARC induces the expression of EMT regulatory transcription factors Snail family transcriptional repressor 1 (Snail), Snail family transcriptional repressor 2 (Slug), and zinc finger E-box binding homeobox 1 (Zeb1). In addition, SPARC knockdown in PC3 cells decreases migration and invasion in vitro, without modifying cell proliferation. Our results indicate that SPARC might facilitate tumor progression by modifying the cellular phenotype in cancer cells.
