©2008 magnamedics magnamedics sustainable and smart nanomaterials will enable nanotechnologies paul...
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©2008 MagnaMedics
MagnaMedics
Sustainable and smart nanomaterials will enable nanotechnologies
Paul J.A. Borm
©2008 MagnaMedics
MagnaMedics
Chemelot campus,800 ha, 80 companiesIncl DSM, SABIC
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MagnaMedics
J. Miro, self-portrait
CEO
ProductsProductionProfit
NanoparticlesAs tools
Prof
PeoplePlanetPapers
Nanoparticles as Objects of study
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MagnaMedics
Intentionally produced NP-already on the market
-Newly engineered
Unintentionally produced NP-Combustion-Nucleation
New products, applicationsHigh added value
Nanomedicine:Intended exposureHigh dose, low risk
No added value, extra costConsiderable health risks
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MagnaMedics
©2008 MagnaMedics
MagnaMedics
CountryTarget/response
NanoMaterials C/Ac NanoHSE Reference
World 337/64Carbon basedMetal oxides
64/0 37Gerritzen et al, 2006
Denmark 165/11Metal oxidesSilica, polymersCarbon black
6/5 1Tonning & Poulsen, 2007
Switserland 197/43Silica, TiO2Metal oxides, AgCarbon black
43/0 N.DSchmid &Riediker,2008
Zwitserland & Germany
?/40 No info 40/0 13Helland et al, 2008
UK ? /9 No info 7/2 N.D. VRS, 2007
Netherlands 98/8 No info 5/3 N.DMikkers et al, 2007
Netherlands 122/37Carbon blackmetal oxidessilica
30/7 9Borm et al(2008)
Risk = hazard x exposure
Hazard: the “ability” of a chemical to cause harm
Risk: the “probability” it will do so
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Company policies for handling nanomaterials
• Defined by 9 out of 32 companies (24%)• Others on project level
• 3 most important elements:– Pre-emptive choice on specific nanoparticles– Handling all nanomaterials as toxic substances (safety principle)– Choices on the physical form of nanoparticles
Borm, Houba & Linker (2008) Survey on best practices in handling nanomaterials in Dutch industry.
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0%
20%
40%
60%
80%
100%
120%
per
cen
tag
e o
f co
mp
anie
soverall
particles
particles & matrix
embedded in matrix only
Occupational hygiene strategies by approach
Risk = hazard x exposure
Hazard: the “ability” of a chemical to cause harm
Risk: the “probability” it will do so
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MagnaMedics
Combustion NP
Engineered NPNanomedicine
Bulk industrial NP
Epidemiology
Toxicology?
?
Sources of evidence: a Bermuda Triangle
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Most of the evidence for human effects of NP is generated using unintentionallyunintentionally produced combustion Nanoparticles.
Effects of manufactured Nanoparticles have mainlybeen studied with a small set of particles alreadyon the market for decades (carbon black, TiO2, FeO)and more recently on carbon nanotubes.
In words:
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General paradigms in nanoparticle toxicity based on inhalation
• Size matters for many dynamic and kinetic issues.• Inflammation is the key hallmark in effects.• Surface area is the best metric for inflammation. For
other effects no such consensus is present.• At fine size, aggregates of nanoparticles have a larger
effect than one fine particle of the same material.• Aggregates of nanoparticles cannot be dissociated in
epithelial lining fluid. Does that impede single NP uptake?
• Size is the main driver for current studies.• Little data is available that allow bridging to other
routes of exposure or materials
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Platelet aggregation by NP
PM and carbon nanoparticlesHave similar hazards
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Technology& ServicesMagCustom: Customized Beads and Materials
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DrugMatrix
Linker
Homingdevice
Imagingtool
Assembly
Customized nanotools andAssemblies, based on Magnetic properties
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Drug delivery platforms on magnetic capture
Applied successfullyIn animal studies.
Krukemeyer et al (2008)In preparation
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Mitoxantrone-loadedIron nanoparticles.Size: 120 nmSurface: dextraneZeta-potential: -34 mVLoad MT: 20 ug/mgDose: 1 mg/kg BW
Photo’s courtesy dr. Krukemeyer
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Patient KL, treated with mitoxantrone-FF(100 mg/m2) liver metastasis reduced from 14.9 to 8.0 cm3
30.05.2008 04.07.2008
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Liver function
0
20
40
60
80
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120
-2 0 1 2 3 4 14 30
Time (days)
GOT
GPT
AP
y-GT
• No hair loss• No gastro-intestinal complications
• Normal kidney function• Temporal loss of leucocytes and thrombocytes.
• iron accumulation in the spleem
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MagnaMedics
Intravenous delivery of engineered NPNeeds to study a series of questions:
• what happens to the FeO particles upon release from coatings?
• Is the surface active to bind endogenous proteins?
• Are NP being degraded/excreted or reach other targets.
• Do circulating FeO particles affect platelet aggregation, thrombosis or any other vascular condition?
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Technology& ServicesMagCustom: Customized Beads and Materials
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MagnaFy: making devices visible
Immobilize NP in polymers and compositesUse magnetic properties and signal distortion: markers are magnified and easily visibleNo release of contrast agent in bodySmall volume and therefore no heatingApplication to existing medical devices
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Medical imaging-guidewires Application in renal stenting
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MagnaFy: Biocompatibility and safety
Coated rods were found to be biocompatible in blood samples.
No wearing of markers in guide-wires after application in vivo
In worst-case damage of marker would cause release of iron-oxide nanoparticles. The iron oxide nanoparticles in our coating our non-toxic and biocompatible to relevant target systems.
Iron oxides are used as SPIONS and injected on purpose as contrast agent.
Matrix, iron-oxide and hydrophilic coating are fully biocompatible.
Residence time of devices is usually low ( < 15 min) and are removed from the body
No release from device as applied in active imaging
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Data on toxicity of (drop-out) engineered nanoparticles fromnanomedicine and its resulting conceptual understandingcan be used as a benchmark for all nanomaterials:
1.Learn from properties of drop-outs 2.Learn from placebo groups3.Effects at high (intentional) doses4.Acute effects and chronic pathology5.Use of sensitive and well-characterized models6.Generate conceptual understanding7.Bridge know-how to other materials and sectors
Nanomedicine as a benchmark?
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NanoMedicine mar help to fullfil Nanotechnology essential needs:
Guide to safe and sustainable (nano)materials
Set standards for handling and best-practices
Generate amended regulation and tests, through it sensitive models
May create success stories that show the benefit-risk balance in a proper way.
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NanoScreen: our solution to your question
Content: • Screen your product for nanoparticles and
exposure potential • Screen and monitor your workers for particle
exposure and uptake• Screen the biocompatibility of your products and
components.• Screen your best-practices
A business to business service from one userto another. You learn from our experience
©2008 MagnaMedics
MagnaMedics