One-shot genetic analysis in monolithic Silicon/Pyrex microdevices

C. Potrich, L. Lunelli, L. Pasquardini, D. Sonn, Diego Vozzi, R. Dallapiccola, L. Marocchi, I. Ferrante, O. Rossotto, C. Pederzolli

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Modern Lab-on-a-chip (LOC) platforms for genomic applications integrate several biological tasks in a single device. Combination of these processes into a single device minimizes sample loss and contamination problems as well as reducing analysis time and costs. Here we present a study of a microchip platform aimed at analyzing issues arising from the combination of different functions, such as DNA purification from blood, target amplification by PCR and DNA detection in a single silicon-based device. DNA purification is realized through two different strategies: 1) amine groups coating microchannel surfaces and 2) magnetic nanoparticles coated by chitosan. In the first strategy silicon/Pyrex microdevices coated with 3-aminopropyltriethoxysilane (APTES) or 3-2-(2-aminoethylamino)-ethylamino]-propyltrimethoxysilane (AEEA) were examined and their efficiency in human genomic DNA adsorption/desorption was evaluated. APTES treatment was the most suitable for the purification of a reasonable amount of DNA in a state suitable for the following PCR step. The second strategy has instead the main advantage of avoiding an elution step, since the DNA adsorbed on the magnetic nanoparticles can be used as PCR template. On-chip PCR was performed in a custom thermocycler, while the detection of PCR products was carried out by fluorescence reading. A complete genetic analysis was demonstrated on the monolithic silicon/Pyrex microchip, starting from less than 1 μ L of human whole blood and arriving at SNPs identification. The successful integration of DNA purification, amplification and detection on a single microdevice was proven without the need for biological passivation steps and possibly simplifying the realization of genomic detection devices.

Original languageEnglish
Pages (from-to)1103-1113
Number of pages11
JournalBiomedical Microdevices
Volume14
Issue number6
DOIs
Publication statusPublished - 2012
Externally publishedYes

Fingerprint

Silicon
DNA
Purification
Polymerase Chain Reaction
Equipment and Supplies
Nanoparticles
Amplification
Blood
Lab-on-a-chip
Chitosan
Microchannels
Passivation
Adsorption
Amines
Single Nucleotide Polymorphism
Reading
Desorption
Contamination
Fluorescence
Costs and Cost Analysis

Keywords

  • DNA purification
  • LOC
  • PCR
  • Silicon microchip

ASJC Scopus subject areas

  • Biomedical Engineering
  • Molecular Biology

Cite this

Potrich, C., Lunelli, L., Pasquardini, L., Sonn, D., Vozzi, D., Dallapiccola, R., ... Pederzolli, C. (2012). One-shot genetic analysis in monolithic Silicon/Pyrex microdevices. Biomedical Microdevices, 14(6), 1103-1113. https://doi.org/10.1007/s10544-012-9676-1

One-shot genetic analysis in monolithic Silicon/Pyrex microdevices. / Potrich, C.; Lunelli, L.; Pasquardini, L.; Sonn, D.; Vozzi, Diego; Dallapiccola, R.; Marocchi, L.; Ferrante, I.; Rossotto, O.; Pederzolli, C.

In: Biomedical Microdevices, Vol. 14, No. 6, 2012, p. 1103-1113.

Research output: Contribution to journalArticle

Potrich, C, Lunelli, L, Pasquardini, L, Sonn, D, Vozzi, D, Dallapiccola, R, Marocchi, L, Ferrante, I, Rossotto, O & Pederzolli, C 2012, 'One-shot genetic analysis in monolithic Silicon/Pyrex microdevices', Biomedical Microdevices, vol. 14, no. 6, pp. 1103-1113. https://doi.org/10.1007/s10544-012-9676-1
Potrich C, Lunelli L, Pasquardini L, Sonn D, Vozzi D, Dallapiccola R et al. One-shot genetic analysis in monolithic Silicon/Pyrex microdevices. Biomedical Microdevices. 2012;14(6):1103-1113. https://doi.org/10.1007/s10544-012-9676-1
Potrich, C. ; Lunelli, L. ; Pasquardini, L. ; Sonn, D. ; Vozzi, Diego ; Dallapiccola, R. ; Marocchi, L. ; Ferrante, I. ; Rossotto, O. ; Pederzolli, C. / One-shot genetic analysis in monolithic Silicon/Pyrex microdevices. In: Biomedical Microdevices. 2012 ; Vol. 14, No. 6. pp. 1103-1113.
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