La nanotoxicología y el uso de la nanotecnología en el ... · catalysts for redox reactions in...
Transcript of La nanotoxicología y el uso de la nanotecnología en el ... · catalysts for redox reactions in...
La nanotoxicología y el
uso de la
nanotecnología en el
diagnóstico molecularDr. Rodrigo Balam Muñoz Soto
Nanomaterials are gaining increasing attention in recent
years; their unique mechanical, optical and electrical
properties may result in a wide range of applications
(Haynes, 2010).
Engineered Nanoparticles
Metal nanomaterials
Metal oxide nanomaterials
Quantum Dots
Carbon nanomaterials
Metal Nanomaterial
The term metal nanoparticle is
used to described nanosized
metals with dimensions (length,
width or thickness) within the size
range 1-100 nm.
Metal oxide
Metal oxide (MOx) nanoparticles are in high volume and frequently used for their semiconducting properties, including as catalysts for redox reactions in engineered systems and natural environments. From a biological perspective, the semiconducting properties could be responsible for generating adverse health outcomes
Quantum dots
Quantum dots are tiny
particles or nanocrystals of a
semiconducting material with
diameters in the range of 2-
10 nanometers (10-50 atoms)
Carbon NanoMaterials
Nanotubes
Factores relacionados con la toxicidad
Composición
Tamaño y forma
Diámetro y longitud
Aglomeración
Estructura
Modificaciones en la
superficie
Biopersistencia
Physical and chemical properties of NMs
influencing their toxicity
Routes of exposure
Pulmonary tract
Skin
Gastrointestinal exposure
Cardiovascular
Main cellular mechanisms
In vitro and in vivo models
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Engineered Nanoparticles for Diagnostics
gold NPs,
fluorescent NPs, especially quantum dots,
and magnetic NPs,
Gold NPs
The ease of AuNP functionalization
provides a versatile platform for
nanobiological assemblies with:
oligonucleotides
Antibodies
and other molecules
Synthesis of gold NPs
Properties og GNPs
Applications LFA
lateral-flow assays, the minimum number of AuNPs that
can be detected with the unaided eye on a white
background is around 1X1010, ideally allowing the
detection of 10 fM of a target molecule
QD
Quantum dots are tiny particles
or nanocrystals of a
semiconducting material with
diameters in the range of 2-10
nanometers (10-50 atoms)
Magnetic NPs
magnetic separations of DNA
(immobilization, isolation, diagnosis
of genetic disorders and detection
of exogenous substances in the
organisms)
magnetic immobilization of proteins
(applications in biotechnology,
medicine, and catalysis)
magnetic separations of pathogens
(i.e. isolation of bacteria, detection
of various pathogens)
magnetic resonance imaging
(imaging contrast agents,
lymphangiography).
MNPs
In biomedical applications, MNPs
are generally in the
superparamagnetic state (2,3).
The most frequently used
nanomaterial is the iron oxide
nanoparticle, including magnetite
(Fe3O4) and maghemite (γ-Fe2O3)
Detección de moléculas
Signalling
Nature Materials volume 10, pages 545–552 (2011)
Bacteria detection
C-dots
Theragnostics
Theranostics 2014; 4(9):904-918. doi:10.7150/thno.9448
Theranostic Self-Assembly Structure of Gold Nanoparticles for NIR Photothermal
Therapy and X-Ray Computed Tomography Imaging
NPs dirigidas
46
Resultados Fe0@Au PEG SH
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Viabilidad celular en células
A549
C+ C
- 0
Fe@
Au
0
Fe
@Au A
c. A
sc
0
Fe
@Au P
EG
0
Fe
50
100
150
2002 h
24 h
8 h
4 h
Exposición celular a 5g/mL de nanopartículas en tiempos de 2h, 4h, 8h, 24h
% V
iab
ilid
ad
Viabilidad celular en células
A549
C+ C
-Fe0
Fe0@
Au
Fe0@
Au A
c. A
sc
Fe0@
Au P
EG
0
50
100
150
2002 h
4 h
8 h
24 h
Exposición celular a 10g/mL de nanopartículas en tiempos de 2h, 4h, 8h, 24h
% V
iab
ilid
ad
Resultados de viabilidad
Conclusiones
Diferentes tipos de NPs
Aplicaciones de NPs en POCs
Combinación con microfluídica
Cáncer, Enfermedades genéticas e infecciosas
Otros campos fuera de salud
Agradecimientos
Grupo de Enfoque en Bioingeniería, Biosistemas y
Biología Sintética (3BS)