circCUL3 drives malignant progression of cervical cancer by activating autophagy through sponge miR-223-3p upregulation of ATG7
Gene, ISSN: 0378-1119, Vol: 925, Page: 148572
2024
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Article Description
Circular RNA (circRNA) has emerged as a pivotal regulatory factor in cancer biology, yet its exact role in cervical cancer remains incompletely understood. In this study, we investigated the functional role of circCUL3 in cervical cancer and explored its potential as a therapeutic target. Functional gain and loss experiments were conducted in Hela and Siha cell lines to elucidate the biological functions of circCUL3 in cervical cancer. The results revealed that circCUL3 overexpression significantly enhanced cell viability, migration, and invasion while suppressing apoptosis, while circCUL3 knockout displayed the opposite effects. Mechanistically, we identified hsa-miR-223-3p as a target of circCUL3, with its expression being negatively regulated by circCUL3. Furthermore, we discovered that circCUL3 could sequester miR-223-3p, leading to the upregulation of ATG7 expression, and this was linked to the regulation of autophagy in cervical cancer cells. In vivo validation using a xenograft mouse model further supported our in vitro findings. Notably, we found that chloroquine (CQ), an autophagy inhibitor, restored miR-223-3p expression and counteracted the oncogenic effect of circCUL3 overexpression. In conclusion, circCUL3 potentially contributes to the malignant progression of cervical cancer by acting as a sponge for miR-223-3p, resulting in the upregulation of ATG7 and the activation of autophagy.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0378111924004530; http://dx.doi.org/10.1016/j.gene.2024.148572; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85194178441&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/38759738; https://linkinghub.elsevier.com/retrieve/pii/S0378111924004530; https://dx.doi.org/10.1016/j.gene.2024.148572
Elsevier BV
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