circZMYM2 Competed Endogenously with miR-335-5p to Regulate JMJD2C in Pancreatic Cancer

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Pancreatic cancer (PC) is a devastating disease with limited treatment options.
• Circular RNAs (circRNAs) are emerging as key regulators in various cancers, including PC.
• The specific role of circZMYM2 in PC progression and its molecular mechanism remain largely unexplored.

Purpose of the Study:

• To investigate the involvement of circZMYM2 (hsa_circ_0099999) in pancreatic cancer cell proliferation, apoptosis, and invasion.
• To elucidate the underlying mechanism by which circZMYM2 regulates miR-335-5p and JMJD2C.

Main Methods:

• Differential expression analysis of circRNAs in PC tissues and normal samples using microarray.
• qRT-PCR to determine circZMYM2 expression levels.
• In vitro assays (CCK-8, flow cytometry, Transwell) to assess the functional impact of circZMYM2 modulation on cancer cells.
• In vivo tumor growth assay in nude mice.
• Molecular mechanism studies including RNA pull down, dual-luciferase reporter assays, and Western blot to confirm interactions and regulatory pathways.

Main Results:

• CircZMYM2 was found to be overexpressed in both PC tissues and cells.
• Knockdown of circZMYM2 significantly inhibited proliferation, induced apoptosis, and reduced invasion of pancreatic cancer cells.
• CircZMYM2 was shown to repress the expression of miR-335-5p, acting as a sponge.
• MiR-335-5p was found to attenuate PC development by inhibiting the oncogene JMJD2C.

Conclusions:

• CircZMYM2 plays a crucial role in promoting pancreatic cancer progression.
• CircZMYM2 acts as a molecular sponge for miR-335-5p, consequently modulating the expression of the downstream oncogene JMJD2C.
• These findings highlight circZMYM2 as a potential therapeutic target for pancreatic cancer.