Gold@silica nanoparticles functionalized with oligonucleotides: A prominent tool for the detection of the methylated reprimo gene in gastric cancer by dynamic light scattering

María José Marchant, LEDA MARCELA GUZMAN MALUENDA, Alejandro H. Corvalán, Marcelo J. Kogan

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Reprimo (RPRM) is a tumor suppressor gene involved in the development of gastric cancer. Hypermethylation of the RPRM promoter region has been found in tumor tissue and plasma samples from patients with gastric cancer. These findings suggest that circulating methylated DNA of RPRM could be a candidate for a noninvasive detection of gastric cancer. We designed a nanosystem based on the functionalization of silica coated gold nanoparticles with oligonucleotides that recognize a specific DNA fragment of the RPRM promoter region. The functionality of the oligonucleotide on the surface of the nanoparticle was confirmed by polymerase chain reaction (PCR). The nanoparticles were incubated with a synthetic DNA fragment of methylated DNA of RPRM and changes in the size distribution after hybridization were evaluated by dynamic light scattering (DLS). A difference in the size distribution of nanoparticles hybridized with genomic DNA from the KATO III gastric cancer cell line was observed when was compared with DNA from the GES-1 normal cell line. These results showed that this nanosystem may be a useful tool for the specific and sensitive detection of methylated DNA of RPRM in patients at risk of developing gastric cancer.

Original languageEnglish
Article number1333
JournalNanomaterials
Volume9
Issue number9
DOIs
StatePublished - Sep 2019
Externally publishedYes

Keywords

  • Dynamic light scattering
  • Gastric cancer
  • Gold nanoparticles
  • Methylated rprm dna
  • Noninvasive detection

Fingerprint

Dive into the research topics of 'Gold@silica nanoparticles functionalized with oligonucleotides: A prominent tool for the detection of the methylated reprimo gene in gastric cancer by dynamic light scattering'. Together they form a unique fingerprint.

Cite this