Nitrilotriacetic acid (NTA) induces aneuploidy in drosophila and mouse germ‐line cells

Abstract
The ability of nitrilotriacetic acid (NTA) to induce aneuploidy was studied in the germ line of both Drosophila and the mouse. The Free Inverted × Chromosomes (FIX) genetic system, adopting a brooding scheme, was used to detect induced aneuploidy in Drosophila, and a cytogenetic method based on chromosomal counting in secondary spermatocytes was used in the mouse. In Drosophila a highly significant (P < 0.001) increase of aneuploidies was produced by NTA (5 × 10−2 M), which was greater than that produced by colchicine (7.5 × 10−6 M) and 5‐fluorodeoxyuridine (10−4 M), which were used as positive controls. Brooding effects were observed with NTA, which produced a maximum induction of chromosomal gain in brood I, suggesting a possible stage‐specific action during meiosis. The ability of NTA (275 mg/kg body weight) to induce meiotic aneuploidy (hyperhaploidy) also was confirmed in the mouse (P < 0.001), where all the aneuploidies detected were attributable to treatment of the metaphase I stage.

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