LncRNA PCAT1 enhances cell proliferation, migration and invasion by miR-508-3p/NFIB axis in diffuse large B-cell...

Area of Science:

• Oncology
• Molecular Biology
• Biochemistry

Background:

• PCAT1 is a known driver in hepatocellular carcinoma.
• Its regulatory mechanism in diffuse large B-cell lymphoma (DLBCL) is poorly understood.

Purpose of the Study:

• To investigate the role and regulatory mechanism of PCAT1 in DLBCL.
• To explore the relationship between PCAT1, miR-508-3p, and NFIB in DLBCL.

Main Methods:

• Quantitative real-time PCR (RT-qPCR) for gene expression.
• Cell Counting Kit-8 (CCK-8) and Transwell assays for cell behavior.
• Western blot for protein analysis.
• Dual-Luciferase reporter assay for molecular interactions.

Main Results:

• PCAT1 expression is upregulated in DLBCL tissues and associated with clinical stage and IPI score.
• Overexpression of PCAT1 enhances DLBCL cell proliferation, migration, and invasion.
• PCAT1 sponges miR-508-3p, which targets NFIB; both miR-508-3p and NFIB levels are altered in DLBCL.
• MiR-508-3p overexpression inhibits DLBCL progression, an effect reversed by PCAT1.
• NFIB silencing suppresses DLBCL progression, but this effect is diminished by PCAT1 or miR-508-3p manipulation.

Conclusions:

• PCAT1 functions as a competing endogenous RNA (ceRNA) by sponging miR-508-3p.
• This interaction leads to the upregulation of NFIB, promoting DLBCL cell proliferation, migration, and invasion.