• Am J Ther · May 2017

    MiR-221 Exacerbate Cell Proliferation and Invasion by Targeting TIMP3 in Papillary Thyroid Carcinoma.

    • Yingbin Diao, Hongyu Fu, and Qian Wang.
    • Departments of 1Endocrinology and 2Rheumatology, Daqing Oilfield General Hospital, Heilongjiang, China.
    • Am J Ther. 2017 May 1; 24 (3): e317-e328.

    AbstractMiR-221 is frequently upregulated in papillary thyroid cancer (PTC) tissues and cell lines, and this study was designed to validate the association of miR-221 with PTC proliferation, apoptosis, and migration. We observed that miR-221 suppressed TIMP3 expression by binding to 3' untranslated region of TIMP3 mRNA, and TIMP3 expression was increased with the presence of miR-221 inhibitors; TIMP3 siRNA could reverse the effects of miR-221 inhibitors on PTC cells. The results indicated that miR-221 exacerbated PTC by downregulating the expression of TIMP3. The effects of miR-221 and TIMP3 in vivo were also confirmed by human PTC-bearing mice models which suggest consistent results with those in vitro studies. In summary, miR-221 could aggravate cell proliferation and invasion of PTC by targeting TIMP3.

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