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Highly penetrative, drug-loaded nanocarriers improve treatment of glioblastoma.

Al's Comment:

 This is a new method of delivering higher dosages of drugs to the brain tumors. Looks promising - but too early to tell how it will work in people


Posted on: 07/10/2013

 
 
1.  Proc Natl Acad Sci U S A. 2013 Jul 1. [Epub ahead of print]
 
Highly penetrative, drug-loaded nanocarriers improve treatment of glioblastoma.
 
Zhou J, Patel TR, Sirianni RW, Strohbehn G, Zheng MQ, Duong N, Schafbauer T, Huttner AJ, Huang Y, Carson RE, Zhang Y, Sullivan DJ Jr, Piepmeier JM, Saltzman WM.
Departments of Biomedical Engineering, Neurosurgery, Diagnostic Radiology, and Pathology, Yale University, New Haven, CT 06511.
 
Abstract
Current therapy for glioblastoma multiforme is insufficient, with nearly universal recurrence. Available drug therapies are unsuccessful because they fail to penetrate through the region of the brain containing tumor cells and they fail to kill the cells most responsible for tumor development and therapy resistance, brain cancer stem cells (BCSCs). To address these challenges, we combined two major advances in technology: (i) brain-penetrating polymeric nanoparticles that can be loaded with drugs and are optimized for intracranial convection-enhanced delivery and (ii) repurposed compounds, previously used in Food and Drug Administration-approved products, which were identified through library screening to target BCSCs. Using fluorescence imaging and positron emission tomography, we demonstrate that brain-penetrating nanoparticles can be delivered to large intracranial volumes in both rats and pigs. We identified several agents (from Food and Drug Administration-approved products) that potently inhibit proliferation and self-renewal of BCSCs. When loaded into brain-penetrating nanoparticles and administered by convection-enhanced delivery, one of these agents, dithiazanine iodide, significantly increased survival in rats bearing BCSC-derived xenografts. This unique approach to controlled delivery in the brain should have a significant impact on treatment of glioblastoma multiforme and suggests previously undescribed routes for drug and gene delivery to treat other diseases of the central nervous system.
 
 PMID: 23818631 [PubMed - as supplied by publisher] 
 

 


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