Direct microcontact printing of oligonucleotides for biochip applications - LAAS - Laboratoire d'Analyse et d'Architecture des Systèmes Accéder directement au contenu
Article Dans Une Revue Journal of Nanobiotechnology Année : 2005

Direct microcontact printing of oligonucleotides for biochip applications

Résumé

Background: A critical step in the fabrication of biochips is the controlled placement of probes molecules on solid surfaces. This is currently performed by sequential deposition of probes on a target surface with split or solid pins. In this article, we present a cost-effective procedure namely microcontact printing using stamps, for a parallel deposition of probes applicable for manufacturing biochips. Results: Contrary to a previous work, we showed that the stamps tailored with an elastomeric poly(dimethylsiloxane) material did not require any surface modification to be able to adsorb oligonucleotides or PCR products. The adsorbed DNA molecules are subsequently printed efficiently on a target surface with high sub-micron resolution. Secondly, we showed that successive stamping is characterized by an exponential decay of the amount of transferred DNA molecules to the surface up the 4th print, then followed by a second regime of transfer that was dependent on the contact time and which resulted in reduced quality of the features. Thus, while consecutive stamping was possible, this procedure turned out to be less reproducible and more time consuming than simply re-inking the stamps between each print. Thirdly, we showed that the hybridization signals on arrays made by microcontact printing were 5 to 10-times higher than those made by conventional spotting methods. Finally, we demonstrated the validity of this microcontact printing method in manufacturing oligonucleotides arrays for mutations recognition in a yeast gene. Conclusion: The microcontact printing can be considered as a new potential technology platform to pattern DNA microarrays that may have significant advantages over the conventional spotting technologies as it is easy to implement, it uses low cost material to make the stamp, and the arrays made by this technology are 10-times more sensitive in term of hybridization signals than those manufactured by conventional spotting technology.
Fichier principal
Vignette du fichier
document(1).pdf (4.98 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-01767470 , version 1 (24-05-2019)

Identifiants

Citer

Christophe Thibault, Véronique Le Berre, Stéphane Casimirius, Emmanuelle Trévisiol, Jean Marie François, et al.. Direct microcontact printing of oligonucleotides for biochip applications. Journal of Nanobiotechnology, 2005, 3, pp.7. ⟨10.1186/1477-3155-3-7⟩. ⟨hal-01767470⟩
125 Consultations
9 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More