miR-34c-3p Inhibits Nasopharyngeal Carcinoma Development via Inhibiting M2 Polarization of Macrophages

Area of Science:

• Oncology
• Molecular Biology
• Immunology

Background:

• Nasopharyngeal carcinoma (NPC) is a prevalent head and neck cancer.
• The role and mechanism of miR-34c-3p in NPC remain largely unexplored.
• Down-regulation of miR-34c-3p is observed in NPC tissues.

Purpose of the Study:

• To investigate the biological function of miR-34c-3p in NPC.
• To elucidate the underlying molecular mechanisms of miR-34c-3p action in NPC.
• To evaluate miR-34c-3p as a potential therapeutic target for NPC.

Main Methods:

• Quantitative real-time polymerase chain reaction (qRT-PCR) and western blotting were used to assess miR-34c-3p, CD86, and CD206 expression.
• Cell counting kit-8 (CCK8) and transwell assays were performed to evaluate NPC cell proliferation, migration, and invasion.
• Flow cytometry, immunohistochemistry, and hematoxylin-eosin (HE) staining were utilized to analyze macrophage polarization and tumor pathology.

Main Results:

• miR-34c-3p mimic transfection inhibited M2 macrophage polarization by targeting SLC7A11.
• M2 macrophages transfected with miR-34c-3p mimic suppressed NPC cell proliferation, migration, and invasion.
• In vivo studies demonstrated that miR-34c-3p mimics inhibited tumor growth and reduced inflammatory infiltration.

Conclusions:

• miR-34c-3p plays a crucial role in regulating NPC progression.
• Targeting miR-34c-3p offers a novel therapeutic strategy for NPC.
• This study provides new insights into NPC pathogenesis and treatment.