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Updated: Feb 27, 2026

In Vivo Inhibition of MicroRNA to Decrease Tumor Growth in Mice
Published on: August 23, 2019
The long non-coding RNA HOTAIR promotes thyroid cancer cell growth, invasion and migration through the miR-1-CCND2
Wang Di1, Qinghuai Li1, Wei Shen1
1Department of Thyroid and Breast Surgery, The Second Hospital of Hebei Medical UniversityShijiazhuang 050000, Hebei, China.
Abstract:
The purpose of this study was to explore the potential role of HOTAIR in thyroid cancer carcinogenesis. We found that HOTAIR was unregulated in human thyroid cancer and inversely correlated with miR-1. Functional assays indicated HOTAIR regulates miR-1 directly in thyroid cancer cells. We also revealed that HOTAIR promotes the processes of thyroid cancer cell malignancy through regulation of microRNA-1 (miR-1). Furthermore, we showed that HOTAIR could regulate a downstream target of miR-1, CCND2, in a miR-1-mediated manner. In addition, we also proved, using a tumor formation assay in nude mice, that silencing HOTAIR inhibited tumor formation in vivo. Therefore, our study demonstrated that HOTAIR promotes the development and progression of thyroid cancer through inhibition of microRNA-1 and activation of CCND2.
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