| Background: Breast cancer (BC) is histologically classified into hormone-receptor+ (ER+, PR + ), human
epidermal growth factor receptor-2+ (Her2 + ), and triple-negative breast cancer (TNBC) types. The important
contribution of tumor-suppressive (TS) microRNAs (miRs) in BC development and treatment have been wellacknowledged in the literature.
Objective: The present review focused on the contribution of recently examined TS miRs in the progression and
treatment of various histological subtypes of BC.
Results: In summary, various miRs have tumor-suppressive roles in BC, so that their aberrant expression leads to
the abnormality in the cellular processes such as enhanced cell growth, decreased apoptosis, cell migration and
metastasis, and decreased sensitivity to chemotherapy through deregulated expression of oncogene targets of TS
miRs.
Conclusion: TS miRs could be regarded as a proper molecular target for target therapy of BC. However, further in
vitro and in vivo investigations are required to confirm the exact molecular functions of TS miRs in BC cells to
offer more efficient targeted therapies. |