Imaging analysis of EGFR mutated cancer cells using peptide nucleic acid (PNA)-DNA probes

Hajime Shigeto, Takashi Ohtsuki, Akira Iizuka, Yasuto Akiyama, Shohei Yamamura

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Lung cancer cells harbor various gene mutations in the mRNA sequence of the Epidermal Growth Factor Receptor (EGFR), especially the mutations of exon19del E746-A750, T790M, and L858R. This results in cancer progression and resistance to anticancer drugs (tyrosine kinase inhibitor; TKI). Therefore, the imaging analysis of EGFR mutations is required for the treatment planning for non-small cell lung cancers. This study focused on the imaging analysis of a single nucleotide substitute in EGFR mutated cancer cells. We developed three novel peptide nucleic acid (PNA)-DNA probes for recognizing and detecting the following three gene mutations in EGFR gene mutations. The PNA-DNA probes consist of fluorescein isothiocyanate (FITC) conjugated PNA as a detection probe and Dabcyl conjugated DNA as a quencher probe. The PNA-DNA probes were used to validate the feasibility for detecting three EGFR mutated sequences: exon19del E746-A750, T790M, and L858R. The three probes emitted fluorescent dose-dependent signals against three target DNA and RNA. Using the three PNA-DNA probes, we succeeded in distinguishing three kinds of lung-cancer cell lines (H1975, PC-9, and A549) which have different EGFR mutations by the fluorescence in situ hybridization (FISH) method.

Original languageEnglish
Pages (from-to)4613-4621
Number of pages9
Issue number15
Publication statusPublished - Aug 7 2019

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy
  • Electrochemistry


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