CircDOCK1 Regulates miR-186/DNMT3A to Promote Osteosarcoma Progression

Area of Science:

• Molecular Biology
• Oncology
• RNA Biology

Background:

• Circular RNAs (circRNAs) are endogenous RNAs involved in osteosarcoma (OS) progression.
• The specific role of circDOCK1 in OS remains largely uncharacterized.
• This study investigates the regulatory mechanism of circDOCK1 in OS.

Purpose of the Study:

• To elucidate the functional role of circDOCK1 in osteosarcoma.
• To determine the mechanism by which circDOCK1 influences OS progression.
• To identify circDOCK1 as a potential therapeutic target in OS.

Main Methods:

• Quantitative real-time PCR (QRT-PCR) and Western blotting assessed molecule expression.
• Cell proliferation, invasion, and migration were evaluated using CCK-8, EdU, colony formation, Transwell, and wound healing assays.
• Luciferase reporter assays, RNA immunoprecipitation (RIP), and pull-down assays confirmed molecular interactions; in vivo function was assessed using xenograft models.

Main Results:

• circDOCK1 expression was significantly elevated in OS tissues and cells.
• Knockdown of circDOCK1 inhibited OS cell proliferation, motility, and invasion, and suppressed tumor xenograft growth.
• Mechanistic studies revealed that circDOCK1 sponges miR-186, leading to upregulation of its target, DNA methyltransferases 3A (DNMT3A), thereby promoting OS progression.

Conclusions:

• circDOCK1 promotes osteosarcoma progression through the miR-186/DNMT3A axis.
• circDOCK1 represents a novel therapeutic target for osteosarcoma treatment.