Vb. Richardson et al., CELL-CYCLE-STAGE SPECIFICITY OF THE METHOTREXATE BLOCK AS RESOLVED BYX-RAY-INDUCED CHROMOSOME-DAMAGE, Cytogenetics and cell genetics, 66(2), 1994, pp. 126-128
Radiation-induced chromosome aberrations were used as biomarkers to co
mpare G(0), mid-G(1), and methotrexate (MTX)-arrested lymphocytes. The
ratio of chromosome-type to chromatid-type aberrations in MTX-arreste
d cells was consistent with that predicted when postreplicative chromo
somes are exposed to ionizing radiation and supports the premise that
MTX arrests cells in late S/G(2) of the cell cycle.