YTHDC2 Promotes Malignant Phenotypes of Breast Cancer Cells

YTH domain-containing 2 (YTHDC2) is known to be an important regulator for RNA metabolism. Here, we show that YTHDC2 is essential for breast cancer tumorigenesis and metastasis. We examined YTHDC2 expression levels by immunohistochemistry in human breast tumor tissues from 99 patients and found a significantly positive correlation between the YTHDC2 expression level and the tumor stage. We established YTHDC2-knocked-down cell lines using four breast cancer cell lines with different subtypes. Knockdown of YTHDC2 attenuated the sphere-forming and the metastatic ability of breast cancer cells. Although stemness and EMT markers, such as SOX2, c-MYC, and NANOG, were downregulated in several YTHDC2-knocked-down breast cancer cells, a common target gene of YTHDC2 in breast cancer cells was not identified. These findings suggest that while YTHDC2 is involved in malignant progression of breast cancers, the mechanism by which YTHDC2 regulates those phenotypes is different between subtypes of breast cancers.

Automated summary

YTHDC2 is an important regulator for breast cancer tumorigenesis and metastasis, and its expression level is significantly correlated with tumor stage. Knockdown of YTHDC2 attenuates sphere-forming and metastatic ability of breast cancer cells, but the mechanism by which YTHDC2 regulates these phenotypes is different between different subtypes of breast cancer.