Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 46, Pages 13650-13654Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201507682
Keywords
adductomics; cytosine; DNA; nucleobase modifications; surface-enhanced Raman scattering
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Funding
- European Research Council (CrossSERS) [FP7/2013 329131]
- European Research Council [PrioSERS FP7/2014 623527]
- Ministerio de Economia y Competitividad [CTQ2011-23167, CTQ2014-59808R]
- Generalitat de Catalunya [2014-SGR-480]
- Medcom Advance SA
- ICREA Funding Source: Custom
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Recognition of chemical modifications in canonical nucleobases of nucleic acids is of key importance since such modified variants act as different genetic encoders, introducing variability in the biological information contained in DNA. Herein, we demonstrate the feasibility of direct SERS in combination with chemometrics and microfluidics for the identification and relative quantification of 4 different cytosine modifications in both single- and double-stranded DNA. The minute amount of DNA required per measurement, in the sub-nanogram regime, removes the necessity of pre-amplification or enrichment steps (which are also potential sources of artificial DNA damages). These findings show great potentials for the development of fast, low-cost and high-throughput screening analytical devices capable of detecting known and unknown modifications in nucleic acids (DNA and RNA) opening new windows of activity in several fields such as biology, medicine and forensic sciences.
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