Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | Frontiers in Ultrafast Optics |
| Untertitel | Biomedical, Scientific, and Industrial Applications XI |
| Publikationsstatus | Veröffentlicht - 11 Feb. 2011 |
| Extern publiziert | Ja |
| Veranstaltung | Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XI - San Francisco, CA, USA / Vereinigte Staaten Dauer: 23 Jan. 2011 → 26 Jan. 2011 |
Publikationsreihe
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Band | 7925 |
| ISSN (Print) | 0277-786X |
Abstract
Manipulation of cells requires the delivery of membrane-impermeable substances like genetic materials or proteins into the cytoplasm. Thus delivery of molecules over the cell membrane barrier is one of the key technologies in molecular biology. Many techniques concerning especially the delivery foreign DNA have been developed. Notwithstanding there still is a range of applications where these standard techniques fail to raise the desired results due to low efficiencies, high toxicity or other safety issues. Especially the transfection of sensitive cell types like primary and stem cells can be problematic. Here we present an alternative, laser based technique to perforate the cell membrane and thus allowing efficient delivery of extra cellular molecules: Gold nanoparticles (GNP) are brought into close contact with the cell, were the laser-GNP interaction leads to membrane perforation. This allows the utilisation of a weakly focused laser beam leading to fast scanning of the sample and thus to a high throughput. To investigate the GNP-laser interaction in more detail we have compared membrane perforation obtained by different laser pulse lengths. From our results we assume strong light absorption for ps laser pulses and relatively small particles as the initiating perforation mechanism, whereas an enhanced near field scattering occurs at 200 nm GNP when using fs laser pulses. SEM and ESEM imaging were applied to give a deeper insight in the GNP-cell interaction and the effects of laser radiation on the GNP. Additionally dextran- FITC derivatives of varying sizes were used to investigate the impact of molecule size on delivery efficiency.
ASJC Scopus Sachgebiete
- Werkstoffwissenschaften (insg.)
- Elektronische, optische und magnetische Materialien
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Informatik (insg.)
- Angewandte Informatik
- Mathematik (insg.)
- Angewandte Mathematik
- Ingenieurwesen (insg.)
- Elektrotechnik und Elektronik
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- BibTex
- RIS
Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XI. 2011. 79250J (Proceedings of SPIE - The International Society for Optical Engineering; Band 7925).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Gold nanoparticle mediated cell manipulation using fs and ps laser pulses for cell perforation and transfection
AU - Heinemann, Dag
AU - Schomaker, Markus
AU - Motekaitis, D.
AU - Krawinkel, Judith
AU - Killian, Doreen
AU - Murua Escobar, Hugo
AU - Junghanß, Christian
AU - Heisterkamp, Alexander
PY - 2011/2/11
Y1 - 2011/2/11
N2 - Manipulation of cells requires the delivery of membrane-impermeable substances like genetic materials or proteins into the cytoplasm. Thus delivery of molecules over the cell membrane barrier is one of the key technologies in molecular biology. Many techniques concerning especially the delivery foreign DNA have been developed. Notwithstanding there still is a range of applications where these standard techniques fail to raise the desired results due to low efficiencies, high toxicity or other safety issues. Especially the transfection of sensitive cell types like primary and stem cells can be problematic. Here we present an alternative, laser based technique to perforate the cell membrane and thus allowing efficient delivery of extra cellular molecules: Gold nanoparticles (GNP) are brought into close contact with the cell, were the laser-GNP interaction leads to membrane perforation. This allows the utilisation of a weakly focused laser beam leading to fast scanning of the sample and thus to a high throughput. To investigate the GNP-laser interaction in more detail we have compared membrane perforation obtained by different laser pulse lengths. From our results we assume strong light absorption for ps laser pulses and relatively small particles as the initiating perforation mechanism, whereas an enhanced near field scattering occurs at 200 nm GNP when using fs laser pulses. SEM and ESEM imaging were applied to give a deeper insight in the GNP-cell interaction and the effects of laser radiation on the GNP. Additionally dextran- FITC derivatives of varying sizes were used to investigate the impact of molecule size on delivery efficiency.
AB - Manipulation of cells requires the delivery of membrane-impermeable substances like genetic materials or proteins into the cytoplasm. Thus delivery of molecules over the cell membrane barrier is one of the key technologies in molecular biology. Many techniques concerning especially the delivery foreign DNA have been developed. Notwithstanding there still is a range of applications where these standard techniques fail to raise the desired results due to low efficiencies, high toxicity or other safety issues. Especially the transfection of sensitive cell types like primary and stem cells can be problematic. Here we present an alternative, laser based technique to perforate the cell membrane and thus allowing efficient delivery of extra cellular molecules: Gold nanoparticles (GNP) are brought into close contact with the cell, were the laser-GNP interaction leads to membrane perforation. This allows the utilisation of a weakly focused laser beam leading to fast scanning of the sample and thus to a high throughput. To investigate the GNP-laser interaction in more detail we have compared membrane perforation obtained by different laser pulse lengths. From our results we assume strong light absorption for ps laser pulses and relatively small particles as the initiating perforation mechanism, whereas an enhanced near field scattering occurs at 200 nm GNP when using fs laser pulses. SEM and ESEM imaging were applied to give a deeper insight in the GNP-cell interaction and the effects of laser radiation on the GNP. Additionally dextran- FITC derivatives of varying sizes were used to investigate the impact of molecule size on delivery efficiency.
KW - biophotonics
KW - cell manipulation
KW - gold nanoparticles
KW - perforation
KW - plasmonics
KW - transfection
KW - ultra short laser pulses
UR - http://www.scopus.com/inward/record.url?scp=79953843959&partnerID=8YFLogxK
U2 - 10.1117/12.874904
DO - 10.1117/12.874904
M3 - Conference contribution
AN - SCOPUS:79953843959
SN - 9780819484628
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Frontiers in Ultrafast Optics
T2 - Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XI
Y2 - 23 January 2011 through 26 January 2011
ER -