miR‑25‑3p serves as an oncogenic in colorectal cancer cells by regulating the ubiquitin ligase FBXW7 function

Chen,Yanbin; Chen,Bingchen; Tu,Shiliang; Yuan,Hang

doi:10.3892/or.2024.8812

miR‑25‑3p serves as an oncogenic in colorectal cancer cells by regulating the ubiquitin ligase FBXW7 function

Authors:
- Yanbin Chen
- Bingchen Chen
- Shiliang Tu
- Hang Yuan
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Affiliations: General Surgery, Cancer Center, Department of Colorectal Surgery, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, Zhejiang 310014, P.R. China
Published online on: September 25, 2024 https://doi.org/10.3892/or.2024.8812
Article Number: 153
Copyright: © Chen et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Accumulating evidence indicates that the dysregulation of microRNAs (miRNAs or miRs), is associated with human malignancies and suggests a casual role of miRNAs in tumor initiation and progression. Even though it has been discovered that a number of miRNAs play significant parts in the development of colorectal cancer (CRC), it is crucial to comprehend the regulatory functions that other miRNAs play in CRC. Based on GSE183437 and GSE156719 microarray data that were obtained from Gene Expression Omnibus database, candidate miRNAs were researched. The oncogenic effects of miR‑25‑3p in different malignancies have led to its selection for additional investigation in the present study. The expression of miR‑25‑3p was verified by reverse transcription‑quantitative PCR, and its correlation with clinicopathological characteristics in patients with CRC was then investigated. In vitro assays were conducted to investigate the influence of miR‑25‑3p on the proliferative and apoptotic behaviors of HCT116 and Caco‑2 cells. The present data revealed that miR‑25‑3p exhibited one of the most significant upregulations in CRC tissues and cell lines. The expression levels of miR‑25‑3p were found to be intimately correlated with tumor size, distant metastasis, tumor‑node‑metastasis stage, and shorter overall survival rate. In terms of functionality, the downregulation of miR‑25‑3p led to the inhibition of cellular proliferation and the enhancement of apoptosis in both HCT116 and Caco‑2 cell lines. The critical tumor suppressor F‑box and WD repeat containing domain 7 (FBXW7) was identified as a direct molecular target for miR‑25‑3p, with an inverse relationship observed between the two in neoplastic tissues. Subsequent studies demonstrated that the tumor suppressive effects of miR‑25‑3p inhibitor were effectively negated by the silencing of FBXW7. Moreover, the ability of FBXW7 to inhibit the expression of several oncogenes was deemed essential for countering the anticancer effects mediated by miR‑25‑3p downregulation. These findings posit miR‑25‑3p as a promising therapeutic target and prognostic indicator for CRC.

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