To detect new predictive markers from the prostate cancer tissue, to study the expression by cultured cancer-associated fibroblasts (CAFs) of stromal factors implicated in prostate carcinogenesis, and to compare their expressions in localized, metastatic, castration-sensitive (CSCP), castration-resistant prostate tumors (CRCP) as well as in fibroblasts from benign prostatic hyperplasia (BPH).
The genomic expression of 20 stroma-derived factors, including the androgen receptor (AR), growth factors (FGF2, FGF7, FGF10, HGF, TGFβ, PDGFB), protein implicated in invasion (MMP-2, MMP-9 and MMP-11), inflammation (IL-6, IL-17, STAT-3 and NFκB), stroma/epithelium interaction (CDH11, FAP, CXCL12 and CXCL14) and chaperones (HPA1A and HSF1), was evaluated in cultured fibroblasts both from BHP and prostate carcinomas (PCa). After isolation and culture of fibroblasts by biopsy specimens, RNA was isolated and genomic studies performed.
Finally, 5 BPH and 37 PCa specimens were selected: clinically localized (19), metastatic (5), CSCP (7) and CRPC (6). Interleukin-17 receptor (IL-17RB) was highly expressed in CAFs compared with fibroblasts from BPH. However, metalloproteinase-2 and chemokine ligand 14 (CXCL14) were expressed at higher levels by fibroblasts from BPH. The fibroblastic growth factor-7 was highly expressed by CAFs from localized tumors, but metalloproteinase-11 in metastatic tumors. MMP-11, androgen receptor (AR) and heat-shock-70kda-protein-1A (HSPA1A) expressions were significantly higher in CAFs from CRPC.
These results demonstrate a CAFs heterogeneity among prostate carcinomas with regard to some molecular profile expressions that may be relevant in tumor development (IL-17RB), progression (MMP-11) and castration resistance (AR, MMP-11 and HSPA1A).
Journal of cancer research and clinical oncology. 2016 Oct 27 [Epub ahead of print]
Noemi Eiro, Jesus Fernandez-Gomez, Raquel Sacristán, Belen Fernandez-Garcia, Beatriz Lobo, Jorge Gonzalez-Suarez, Alejandro Quintas, Safwan Escaf, Francisco J Vizoso
Unidad de Investigación, Fundación Hospital de Jove, Avda. Eduardo Castro, 161, 33920, Gijón, Asturias, Spain., Unidad de Urología, Hospital Central de Asturias, Universidad de Oviedo, Oviedo, Asturias, Spain., Servicio de Urología, Fundación Hospital de Jove, Avda. Eduardo de Castro, 161, 33920, Gijón, Asturias, Spain., Unidad de Investigación, Fundación Hospital de Jove, Avda. Eduardo Castro, 161, 33920, Gijón, Asturias, Spain. .