BRAF V600E Mutation-Responsive miRNA-222-3p Promotes Metastasis of Papillary Thyroid Cancer Cells via Snail-Induced EMT
mutation accounts for 50% of the PTC (papillary thyroid carcinoma) and is closely associated with high-risk clinicopathological characteristics. Increasing evidence implied that dysregulation of miRNA participated in carcinogenesis and progression of cancer. Clinical data showed the significant up-r...
Saved in:
Published in | Frontiers in endocrinology (Lausanne) Vol. 13; p. 843334 |
---|---|
Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Switzerland
2022
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | mutation accounts for 50% of the PTC (papillary thyroid carcinoma) and is closely associated with high-risk clinicopathological characteristics. Increasing evidence implied that dysregulation of miRNA participated in carcinogenesis and progression of cancer. Clinical data showed the significant up-regulation of miR-222-3p in PTC; however, the role of miR-222-3p and possible relationship with
mutation remained unclear. Here, we identified significant up-regulation of miR-222-3p in PTC tissues harboring
mutation compared with BRAF wild type (
) from collected PTC clinical samples. External validation performed with The Cancer Genome Atlas (TCGA) databases was consistent with the above result. Exogenous expression of BRAF
oncoprotein increased the expression of miR-222-3p in B-CPAP and TPC-1 cells. The treatment of BRAF
and MEK inhibitor, PLX4720 and PD0325901, decreased the expression of miR-222-3p in B-CPAP but not in TPC-1. Inhibition of miR-222-3p significantly suppressed the migration of B-CPAP and induced a mesenchymal-epithelial transition (MET) phenotype
the Snail transcription factor. Immunohistochemistry (IHC) analysis demonstrated the up-regulation of Snail correlated with lymph node metastasis and
mutation in PTC. Besides,
hybridization (ISH) and IHC analysis of PTC clinical samples confirmed the correlation between the expression of miR-222-3p and Snail. These results showed miR-222-3p conduced more aggressive clinical manifestation of PTC by promoting Snail-induced EMT. |
---|---|
ISSN: | 1664-2392 1664-2392 |