Fhit loss in lung preneoplasia: Relation to DNA damage response checkpoint activation

Roberto Cirombella, Giuseppe Montrone, Antonella Stoppacciaro, Simona Giglio, Stefano Volinia, Paolo Graziano, Kay Huebner, Andrea Vecchione

Research output: Contribution to journalArticlepeer-review


Loss of heterozygosity at the FHIT locus is coincident with activation of DNA damage response checkpoint proteins; thus damage at fragile loci may trigger checkpoint activation. We examined preneoplastic lesions adjacent to non-small cell lung carcinomas for alterations to expression of Fhit and activated checkpoint proteins. Expression scores were analyzed for pair-wise associations and correlations among proteins and type of lesion. Hyperplastic and dysplastic lesions were positive for nuclear γH2AX expression; 12/20 dysplastic lesions were negative for Fhit expression. Fhit positive lesions showed expression of most checkpoint proteins examined, while Fhit negative lesions showed absence of expression of Chk1 and phosphoChk1. The results show that loss of expression of Fhit is significantly directly correlated with absence of activated Chk1 in dysplasia, and suggest a connection between loss of Fhit and modulation of checkpoint activity.

Original languageEnglish
Pages (from-to)230-236
Number of pages7
JournalCancer Letters
Issue number2
Publication statusPublished - May 28 2010


  • Chromosome fragile sites
  • DNA damage response checkpoint
  • Fhit
  • Preneoplastic lesions of lung
  • Squamous dysplasia

ASJC Scopus subject areas

  • Cancer Research
  • Oncology


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