Circ_0049271 targets the miR-1197/PTRF axis to attenuate the malignancy of osteosarcoma

• Published in: Cancer biomarkers : section A of Disease markers Vol. 40; no. 2; pp. 141 - 153
• Main Authors: Wen, Yixin, Xu, Feng, Zhang, Hui
• Format: Journal Article
• Language: English
• Published: Netherlands IOS Press BV 01.01.2024; IOS Press
• Subjects: Animals; Antitumor activity; Assaying; Attenuation; Bone cancer; Bone Neoplasms - genetics; Bone Neoplasms - metabolism; Bone Neoplasms - pathology; Cell Line, Tumor; Cell Movement - genetics; Cell Proliferation; Circular RNA; Gene Expression Regulation, Neoplastic; Humans; Immunoprecipitation; In vivo methods and tests; Malignancy; Mice; MicroRNAs - genetics; MicroRNAs - metabolism; miRNA; Osteosarcoma; Osteosarcoma - genetics; Osteosarcoma - metabolism; Osteosarcoma - pathology; Polymerase chain reaction; Reverse transcription; RNA, Circular - genetics; RNA-Binding Proteins - genetics; RNA-Binding Proteins - metabolism; Sarcoma; Tumorigenesis; Up-regulation; Western blotting; circ_0049271; miR-1197; circRNA; Osteosarcoma; PTRF
• ISSN: 1574-0153; 1875-8592; 1875-8592
• DOI: 10.3233/CBM-230191

Circular RNAs (circRNAs) perform key regulatory functions in osteosarcoma (OS) tumorigenesis. In this study, we aimed to explore the detailed action mechanisms of circ_0049271 in OS progression. Cell colony formation, cell counting kit-8, and transwell assays were performed to assess the proliferation and invasion of OS cells. Quantitative reverse transcription-polymerase chain reaction and western blotting were used to determine the expression levels of polymerase 1 and transcript release factor (PTRF), microRNA (miR)-1197, and circ_0049271 in OS cells. Furthermore, RNA immunoprecipitation and dual luciferase assays were conducted to explore the targeted relationships among PTRF, miR-1197, and circ_0049271. Finally, a tumor formation assay was conducted to determine the effects of circ_0049271 on in vivo tumor growth in mice. High expression levels of miR-1197 and low levels of circ_0049271 and PTRF were observed in OS cells. circ _0049271 targeted miR-1197 to mediate PTRF expression. Moreover, the proliferation and invasion of OS cells were repressed by circ_0049271 or PTRF overexpression and increased by miR-1197 upregulation. Enforced circ_0049271 also impeded tumor growth in vivo. Upregulation of miR-1197 reversed the antitumor effects of circ_0049271 on OS progression in vitro; however, PTRF overexpression attenuated the cancer-promoting effects of miR-1197 on OS in vitro. Our findings revealed that circ_0049271 targeted the miR-1197/PTRF axis to attenuate the malignancy of OS, suggesting a potential target for its clinical treatment.