Incorporation of ophiobolin a into novel chemoembolization particles for cancer cell treatment.

Abstract

PURPOSE:

To design and synthesize chemoembolization particles for the delivery of Ophiobolin A (OphA), a promising fungal-derived chemotherapeutic, directly at the tumour location. To investigate cell death mechanism of OphA on a Rhabdomyosarcoma cancer (RD) cell line. Rhabdomyosarcoma is the most common soft tissue sarcoma in children; with a 5-year survival rate of between 30 and 65%.

METHODS:

Multimodal chemoembolization particles were prepared by sintering mesoporous silica nanoparticles, prepared by the sol-gel method, onto the surface of polystyrene microspheres, prepared by suspension copolymerisation. The chemoembolization particles were subsequently loaded with OphA. The effects of OphA in vitro were characterised by flow cytometry and nanoparticle tracking analysis (NanoSight).

RESULTS:

High loading of OphA onto the chemoembolization particles was achieved. The subsequent release of OphA onto RD cells in culture showed a 70% reduction in cell viability. OphA caused RD cells to round up and their membrane to bleb and caused cell death via apoptosis. OphA caused both an increase in the number of microvesicles produced and an increase in DNA content within these microvesicles.

CONCLUSIONS:

The prepared chemoembolization particles showed good efficacy against RD cells in culture.

• Authors: Rachel Morrison, Chris Gardiner, Antonio Evidente, Robert Kiss, Helen Townley
• Journal: Pharmaceutical research (Pharm Res) Vol. 31 Issue 10 Pg. 2904-17 (Oct 2014) ISSN: 1573-904X [Electronic] United States
• PMID: 24792832 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Antineoplastic Agents, Phytogenic
• Drug Carriers
• Polystyrenes
• Sesterterpenes
• ophiobolin A
• Silicon Dioxide

Topics

• Antineoplastic Agents, Phytogenic (administration & dosage, pharmacology)
• Apoptosis (drug effects)
• Cell Line, Tumor
• Cell Survival (drug effects)
• Chemoembolization, Therapeutic
• Drug Carriers (chemistry)
• Drug Liberation
• Flow Cytometry
• Humans
• Microscopy, Electron, Transmission
• Nanoparticles (chemistry)
• Particle Size
• Polystyrenes (chemistry)
• Rhabdomyosarcoma, Embryonal (blood supply, pathology)
• Sesterterpenes (administration & dosage, pharmacology)
• Silicon Dioxide (chemistry)
• Surface Properties