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MicroRNA-542 (miR-542) produces the mature
strands miR-542-3p and miR-542-5p, which
regulate distinct messenger-RNA targets and should be recorded separately
whenever the strand is identified. In many cancers,
miR-542-3p ↓ is the predominant reported pattern, and
miR-542-3p generally functions as a tumour-suppressive microRNA. Restoration
or miR-542-3p ↑ can inhibit cancer-cell proliferation,
migration, invasion, epithelial-mesenchymal transition, glycolysis, and
tumour growth while promoting apoptosis or cell-cycle arrest. Reported
targets and pathways include CDK14,
ILK, survivin/BIRC5,
PI3K/AKT, WNT/β-catenin,
ERK1/2, JAK2, and
TGF-β signalling. miR-542-3p can also enhance
p53 signalling in susceptible cancer cells. The biological
effect remains tumour- and target-dependent, and miR-542-5p must not be
assumed to have the same targets or direction as miR-542-3p.
Gene reference;
Hepatocellular carcinoma study;
p53 mechanism study.
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