MicroRNA‑9‑5p increases the sensitivity of colorectal cancer cells to 5‑fluorouracil by downregulating high mobility group A2 expression
- Huizhe Zheng
- Bin Yan
- Qi Wu
- Jingli Zhang
Affiliations: Department of Pathology, Hongqi Hospital Affiliated to Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, P.R. China, Department of Rheumatology and Immunology, Hongqi Hospital Affiliated to Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, P.R. China
- Published online on: January 26, 2021 https://doi.org/10.3892/ol.2021.12496
Copyright: © Zheng
et al. This is an open access article distributed under the
terms of Creative
Commons Attribution License.
Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )
This article is mentioned in:
Chemotherapy drug 5‑fluorouracil (5‑FU) is the first‑line treatment for colorectal cancer (CRC); however, 5‑FU resistance decreases CRC therapeutic efficiency. A previous study revealed that microRNA (miR)‑9‑5p serves an antitumor effect in CRC. However, the effect of miR‑9‑5p in CRC chemoresistance remains unknown. In the present study, two CRC cell lines, including HT‑29 and HCT‑116 cells, were used to investigate the impact of miR‑9‑5p in overcoming 5‑FU resistance. The results revealed that treatment with 5‑FU decreased CRC cell viability and upregulated miR‑9‑5p expression in both CRC cells. Knockdown of miR‑9‑5p decreased HCT‑116 cell sensitivity to 5‑FU and inhibited apoptosis. By contrast, miR‑9‑5p overexpression enhanced the sensitivity of HT‑29 cells to 5‑FU and induced apoptosis. Additionally, it was confirmed that miR‑9‑5p directly targeted high mobility group A2 (HMGA2). HMGA2 overexpression reversed miR‑9‑5p‑induced HT‑29 apoptosis. The present study indicated that miR‑9‑5p enhanced the sensitivity of CRC cells to 5‑FU via downregulating HMGA2 expression.