Evaluation of microRNA-10b prognostic significance in a prospective cohort of breast cancer patients.

ABSTRACT:

Background

MicroRNA-10b (miR-10b) has a prominent role in regulating tumor invasion and metastasis by targeting the HOXD10 transcriptional repressor and has been found up-regulated in several tumor types.

Methods

We evaluated the expression of miR-10b in paired tumor and normal specimens obtained from a prospective cohort of breast cancer patients with at least 36 months follow-up enrolled according to the REMARK guidelines (n?=?150). RNA quality was measured and only samples with RNA Integrity Number (RIN) ?7.0 were analyzed.

Results

The relative expression of miR-10b in tumor as compared to its normal counterpart (RER) was determined by RT-qPCR. miR-10b RERs were higher in the subgroup of patients with synchronous metastases (n?=?11, Median 0.25; IQR 0.11-1.02) as compared with patients without metastases (n?=?90, Median 0.09; IQR 0.04-0.29) (p?=?0.028). In the subgroup of patients without synchronous metastases (n?=?90), higher miR-10b RERs were associated with increased risk of disease progression and death in both univariable (HR 1.16, p?=?0.021 and HR 1.20, p?=?0.015 respectively for 0.10 unitary increase of miR-10b RERs levels) and multivariable (HR1.30, p?ConclusionsOur results provide evidences that the addition of miR-10b RERs to the prognostic factors used in clinical routine could improve the prediction abilities for both overall mortality and disease progression in breast cancer patients.

SUBMITTER: Parrella P 

PROVIDER: S-EPMC4055397 | biostudies-literature | 2014 Jun

REPOSITORIES: biostudies-literature