A novel signaling role for miR-451 in esophageal tumor microenvironment and its contribution to tumor progression
Clin. transl. oncol. (Print)
; 19(5): 633-640, mayo 2017. tab, graf
Article
in English
| IBECS
| ID: ibc-162198
Responsible library:
ES1.1
Localization: BNCS
ABSTRACT
Objective. We evaluated miR-451 expression in serum and tissue samples of esophageal squamous cell carcinoma (ESCC) patients. Then, we examined a secretory role of miR-451 in esophageal tumor microenvironment. Methods. miR-451 expression was evaluated in 39 serum samples from esophageal SCC patients compared to 39 normal individuals as well as 26 pairs of fresh-frozen tumor and adjacent normal tissues from patients with ESCC, using qRT-PCR. In a co-culture system of human normal fibroblasts (HFSF-PI3) and esophageal cancer cell line (KYSE-30), we evaluated exosomal miR-451 secretion into the conditioned medium (CM) of both cell lines. Then, we analyzed the effect of primiR-451-transfected fibroblasts on the migration potency of their neighboring KYSE-30 cells. Results. We detected miR-451 over-expression in serum samples of esophageal cancer patients compared to the normal group (P = 0.005). Interestingly, fresh-frozen tumor tissues from the same patients showed miR-451 down-regulation compared to their adjacent normal counterparts (P = 0.043). Co-culturing the KYSE-30 cell line with normal fibroblasts significantly induced miR-451 exosomal secretion into the CM. Moreover, co-culture of KYSE-30 cell line with miR-451-over-expressing fibroblasts significantly induced migration tendency in KYSE-30 cell line compared to the mock-transfected fibroblasts (P < 0.0001). In this system, MIF expression (a validated target of miR-451) in the KYSE-30 cell line was increased although this alteration was not statistically significant (fold change = 4.44). Conclusions. Our data suggest that cancer-associated fibroblasts use exosomal miR-451 as a signaling molecule to provide a favorable niche for tumor cell migration and cancer progression. Our findings provide new insights into the stromal role of miR-451 in the esophageal tumor microenvironment as a communicatory molecule and suggest a signaling role for miR-451 in extracellular matrix cross-talks (AU)
RESUMEN
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Collection:
National databases
/
Spain
Database:
IBECS
Main subject:
Esophageal Neoplasms
/
Gene Expression Regulation, Neoplastic
/
Receptors, Fibroblast Growth Factor
/
Disease Progression
/
MicroRNAs
/
Exosomes
Type of study:
Prognostic study
Limits:
Female
/
Humans
/
Male
Language:
English
Journal:
Clin. transl. oncol. (Print)
Year:
2017
Document type:
Article
Institution/Affiliation country:
Golestan University of Medical Sciences/Iran
/
Tarbiat Modares University/Iran
/
University of Isfahan/Iran