Cytogenetic studies on the in vitro genotoxicity of 4-nitroquinoline-1- oxide on human lymphocytes

T. C. Hsu, N. Savaraji, Z. Trizna, L. Feun, C. Furlong, S. P. Schantz, L. Shirley

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Using the UV-mimetic mutagen 4-nitroquinoline-1-oxide (4NQO) to induce genetic damage in human cells (lymphoblastoid lines and primary cultures of peripheral blood samples), chromosome aberrations were induced by treating the cells with 4NQO at 1 x 10-5 M for 24 h. The overwhelming majority of chromosome aberrations was of the chromatid (S + G2) type instead of the chromosome (G1) type. The most common chromatid aberrations were simple breaks, isochromatid breaks, and chromatid exchanges. When the number of chromatid breaks per cell value was used as a measurement for 4NQO sensitivity, lymphoblastoid cells from a xeroderma pigmentosum patient showed the highest sensitivity, followed by the cells of two melanoma patients and normal persons. These preliminary results suggest that 4NQO may be employed to develop an assay system as a biomarker for determining UV sensitivity in the human population.

Original languageEnglish (US)
Pages (from-to)823-826
Number of pages4
JournalInternational journal of oncology
Issue number5
StatePublished - 1993
Externally publishedYes

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


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