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Updated: Dec 17, 2025

Fluorescence-Based Measurements of Phosphatidylserine/Phosphatidylinositol 4-Phosphate Exchange Between Membranes
Published on: March 14, 2021
Phosphoinositide-specific phospholipase C isoforms are conveyed by osteosarcoma-derived extracellular vesicles
Enrica Urciuoli1, Martina Leopizzi2, Valeria Di Maio2
1Multifactorial Disease and Complex Phenotype Research Area, Research Centre, Bambino Gesù Children's Hospital, Rome, Italy.
Osteosarcoma cancer cells release extracellular vesicles containing phosphoinositide-specific phospholipase C (PI-PLC) enzymes. These vesicles may serve as biomarkers for monitoring osteosarcoma progression.
Area of Science:
- Oncology
- Cell Biology
- Biochemistry
Background:
- Cancer cells release extracellular vesicles that can alter surrounding normal cells.
- Osteosarcoma cells produce vesicles that may induce a tumor-like phenotype in recipient cells.
- Phosphoinositide-specific phospholipase C (PI-PLC) enzyme expression correlates with osteosarcoma aggressiveness.
Purpose of the Study:
- To investigate the presence and localization of PI-PLC isoforms in extracellular vesicles derived from osteosarcoma cells.
- To explore the potential of these extracellular vesicles as biomarkers for osteosarcoma.
Main Methods:
- Confocal microscopy was used to analyze PI-PLC isoform localization within osteosarcoma-derived extracellular vesicles.
- Cytofluorimetric analysis was performed on extracellular vesicles collected from conditioned media.
Main Results:
- Osteosarcoma-derived extracellular vesicles were found to contain all assessed PI-PLC isoforms.
- PI-PLC isoforms were observed within cell membrane bubble-like structures, indicative of vesicle release.
- Cytofluorimetric analysis confirmed PI-PLC presence in collected extracellular vesicles.
Conclusions:
- Extracellular vesicles from osteosarcoma cells carry PI-PLC isoforms.
- Circulating extracellular vesicles show potential as biomarkers for osteosarcoma progression and disease monitoring.
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