Tumor surveillance by circulating microRNAs: a hypothesis

Area of Science:

• Molecular Biology
• Oncology
• Biochemistry

Background:

• Circulating microRNAs show diagnostic relevance in diseases like cancer.
• The biological roles of circulating microRNAs in healthy individuals remain largely uncharacterized.

Purpose of the Study:

• To propose a hypothesis on the biological relevance of circulating microRNAs in healthy individuals.
• To explore the potential of circulating microRNAs as a tumor surveillance mechanism.

Main Methods:

• Hypothesis generation based on existing experimental evidence.
• Analysis of the relative abundance of microRNAs with tumor suppressor activity in circulation.

Main Results:

• A hypothesis is proposed suggesting circulating microRNAs with tumor suppressor activity are abundant in healthy individuals.
• These microRNAs may collectively function as a continuous inhibitor of tumor formation.

Conclusions:

• Circulating microRNAs might play a role in endogenous tumor surveillance.
• MicroRNA-mediated tumor surveillance could be a complementary mechanism to cancer immune surveillance.