title: Cytogenetic studies on the in-vitro genotoxicity of 4-nitroquinoline-1-oxide on human-lymphocytes.
abstract: 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.
authors.affiliation: UNIV MIAMI,SCH MED,DEPT ONCOL,MIAMI,FL 33152. UNIV TEXAS,MD ANDERSON CANC CTR,DEPT HEAD & NECK SURG,HOUSTON,TX 77030. UNIV MIAMI,SYLVESTER COMPREHENS CANC CTR,DEPT MED,MIAMI,FL 33152. MEM SLOAN KETTERING CANC CTR,DEPT HEAD & NECK SURG,NEW YORK,NY 10021.
authors.forename: T
authors.initials: T
authors.lastname: Hsu
authors.forename: N
authors.initials: N
authors.lastname: Savaraji
authors.forename: Z
authors.initials: Z
authors.lastname: Trizna
authors.forename: L
authors.initials: L
authors.lastname: Feun
authors.forename: C
authors.initials: C
authors.lastname: Furlong
authors.forename: S
authors.initials: S
authors.lastname: Schantz
authors.forename: L
authors.initials: L
authors.lastname: Shirley