Extracellular Vesicles: Hermes between cancers and lymph nodes.

Area of Science:

• Oncology
• Cell Biology
• Molecular Biology

Background:

• Cancer remains a leading cause of death globally, with lymph node metastasis (LNM) indicating poor prognosis.
• Understanding the molecular mechanisms of tumor lymphangiogenesis and LNM is crucial for improving cancer patient outcomes.
• Extracellular vesicles (EVs) are key intercellular communicators involved in various biological processes.

Purpose of the Study:

• To review the clinical and mechanistic roles of EVs in regulating cancer lymph node metastasis (LNM).
• To discuss advancements in research methodologies concerning EVs and LNM.
• To propose a novel framework, the "PUMP" principle, for understanding EV-mediated LNM.

Main Methods:

• Literature review of clinical and mechanistic studies on EVs and cancer LNM.
• Analysis of the molecular components within EVs (proteins, nucleic acids, metabolites) that influence metastasis.
• Conceptual framework development for EV-mediated LNM.

Main Results:

• EVs secreted by tumor cells actively regulate the LNM process through their molecular cargo.
• Clinical evidence supports a correlation between EVs and LNM across various cancer types.
• The proposed "PUMP" principle (Preparation, Unleash, Migration, Planting) offers a structured understanding of EV involvement in LNM.

Conclusions:

• EVs play a significant, though not fully elucidated, role in cancer LNM.
• Further research into EV-mediated metastasis is warranted to develop targeted therapeutic strategies.
• The "PUMP" principle provides a novel perspective for investigating and potentially targeting EV functions in cancer progression.