Context: A recent study reports that extracellular RNA (exRNA) from bacteria can persist in disinfected drinking water, aiding analysis of microbial activity.
About Extracellular RNA (exRNA):
- Definition: RNA present outside cells, found in body fluids like blood, saliva, urine, and cerebrospinal fluid.
- Transport Mechanism: Carried in extracellular vesicles (exosomes) or bound to proteins/lipoproteins, which protect it from degradation.
- Key Feature: Exhibits relative stability outside cells due to protective packaging.
- Function: Acts as an intercellular communication molecule, influencing gene expression and cell behaviour.
- Medical Significance: Serves as a non-invasive biomarker (basis of liquid biopsy) for diseases like cancer and cardiovascular disorders.
- Scientific Insight: Demonstrates that cells can actively export RNA, challenging the earlier view of RNA as purely intracellular.
- Helps track bacterial activity in water systems, though its role in gene transfer remains under investigation.
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