miR-374b-5p Modulates Melanoma Progression by Targeting VEGFC and Regulating MAPK Signaling in the Tumor...

Area of Science:

• Oncology
• Molecular Biology
• Cancer Research

Background:

• Melanoma is an aggressive skin cancer with high metastatic potential and poor survival.
• MicroRNAs (miRNAs) are key regulators of tumor progression, but the role of miR-374b-5p in melanoma is largely unknown.

Purpose of the Study:

• To investigate the function of miR-374b-5p in melanoma.
• To identify miR-374b-5p as a potential therapeutic target for melanoma.

Main Methods:

• In vitro studies involving melanoma cell lines with miR-374b-5p overexpression.
• Analysis of target genes (VEGFC), signaling pathways (MAPK), and cellular functions (proliferation, migration, invasion).
• In vivo mouse model to assess tumor growth, angiogenesis, and lymphangiogenesis.

Main Results:

• miR-374b-5p functions as a tumor suppressor in melanoma cells.
• miR-374b-5p directly targets vascular endothelial growth factor C (VEGFC).
• Overexpression of miR-374b-5p reduced melanoma cell proliferation, migration, invasion, tumor growth, and angiogenesis, while downregulating VEGFC.

Conclusions:

• miR-374b-5p is a novel regulator of melanoma progression.
• miR-374b-5p exerts its tumor-suppressive effects via VEGFC-associated MAPK signaling and tumor microenvironment modulation.
• miR-374b-5p represents a promising therapeutic candidate for melanoma treatment.