TY - JOUR
T1 - Thyroid hormone regulation of mir-21 enhances migration and invasion of hepatoma
AU - Huang, Ya Hui
AU - Lin, Yang Hsiang
AU - Chi, Hsiang Cheng
AU - Liao, Chen Hsin
AU - Liao, Chia Jung
AU - Wu, Sheng Ming
AU - Chen, Cheng Yi
AU - Tseng, Yi Hsin
AU - Tsai, Chung Ying
AU - Lin, Sheng Yen
AU - Hung, Yu Ting
AU - Wang, Chih Jen
AU - Lin, Crystal D.
AU - Lin, Kwang Huei
PY - 2013/4/15
Y1 - 2013/4/15
N2 - Thyroid hormone (T3) signaling through the thyroid hormone receptor (TRα1) regulates hepatoma cell growth and pathophysiology, but the underlying mechanisms are unclear at present. Here, we have shown that the oncomir microRNA-21 (miR-21) is activated by T3 through a native T3 response element in the primary miR-21 promoter. Overexpression of miR-21 promoted hepatoma cell migration and invasion, similar to that observed with T3 stimulation in hepatoma cells. In addition, anti-miR-21-induced suppression of cell migration was rescued by T3. The Rac-controlled regulator of invasion and metastasis, T-cell lymphoma invasion and metastasis 1 (TIAM1), was identified as a miR-21 target additionally downregulated by T3. Attenuation and overexpression of miR-21 induced upregulation and downregulation of TIAM1, respectively. TIAM1 attenuation, in turn, enhanced migration and invasion via the upregulation of β-catenin, vimentin, and matrix metalloproteinase-2 in hepatoma cells. Notably, correlations between TRa1, miR-21, and TIAM1 expression patterns in animal models paralleled those observed in vitro. In the clinic, we observed a positive correlation (P=0.005) between the tumor/nontumor ratios of TRa1 and miR-21 expression, whereas a negative correlation (P = 0.019) was seen between miR-21 and TIAM1 expression in patients with hepatoma. Our findings collectively indicate that miR-21 stimulation by T3 and subsequent TIAM1 suppression promotes hepatoma cell migration and invasion. Cancer Res; 73(8); 2505-17.
AB - Thyroid hormone (T3) signaling through the thyroid hormone receptor (TRα1) regulates hepatoma cell growth and pathophysiology, but the underlying mechanisms are unclear at present. Here, we have shown that the oncomir microRNA-21 (miR-21) is activated by T3 through a native T3 response element in the primary miR-21 promoter. Overexpression of miR-21 promoted hepatoma cell migration and invasion, similar to that observed with T3 stimulation in hepatoma cells. In addition, anti-miR-21-induced suppression of cell migration was rescued by T3. The Rac-controlled regulator of invasion and metastasis, T-cell lymphoma invasion and metastasis 1 (TIAM1), was identified as a miR-21 target additionally downregulated by T3. Attenuation and overexpression of miR-21 induced upregulation and downregulation of TIAM1, respectively. TIAM1 attenuation, in turn, enhanced migration and invasion via the upregulation of β-catenin, vimentin, and matrix metalloproteinase-2 in hepatoma cells. Notably, correlations between TRa1, miR-21, and TIAM1 expression patterns in animal models paralleled those observed in vitro. In the clinic, we observed a positive correlation (P=0.005) between the tumor/nontumor ratios of TRa1 and miR-21 expression, whereas a negative correlation (P = 0.019) was seen between miR-21 and TIAM1 expression in patients with hepatoma. Our findings collectively indicate that miR-21 stimulation by T3 and subsequent TIAM1 suppression promotes hepatoma cell migration and invasion. Cancer Res; 73(8); 2505-17.
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U2 - 10.1158/0008-5472.CAN-12-2218
DO - 10.1158/0008-5472.CAN-12-2218
M3 - Article
C2 - 23442323
AN - SCOPUS:84876997786
SN - 0008-5472
VL - 73
SP - 2505
EP - 2517
JO - Journal of Cancer Research
JF - Journal of Cancer Research
IS - 8
ER -
