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MicroRNA-545 (miR-545; principally
miR-545-3p, with miR-545-5p as the
alternate mature strand) is a small non-coding RNA that regulates gene
expression through transcript degradation or translational repression.
In many cancers, miR-545-3p ↓ has been reported and
restoration of miR-545 can inhibit proliferation, migration, invasion,
epithelial-mesenchymal transition, tumour growth, and treatment resistance.
Reported tumour-suppressive targets and pathways include
RIG-I/DDX58, PLK1,
ZEB2/WNT/β-catenin, LAMC2,
HK2, and MT1M. However, miR-545 can act
oncogenically in selected settings: miR-545 ↑ has been
associated with increased proliferation and poorer prognosis in some
hepatocellular and colorectal cancer studies.
Cancer review;
Tumour-suppressive example;
Oncogenic example.
-miR-545-3p ↓ is commonly adverse and restoration is often anticancer, but miR-545 ↑ can be oncogenic in selected cancers.
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