Research Article
A Toxicological Evaluation of Germanium Sesquioxide (Organic Germanium)
Table 3
Summary of chromosomal aberration test results.
| Groups | S9 mix | Treatment time (h) | Harvest time (h) | Mean aberrant cells/150 cells | Number of aberrations | Incl. gaps | Excl. gaps | Incl. gaps | Excl. gaps |
| Experiment A1 | Test item | | | | | | | | 500 μg/mL | − | 3 | 20 | 9 | 4 | 9 | 4 | 1000 μg/mL | − | 3 | 20 | 8 | 4 | 8 | 4 | 2000 μg/mL | − | 3 | 20 | 9 | 4 | 9 | 4 | Vehicle control | − | 3 | 20 | 8 | 4 | 8 | 4 | Positive control | − | 3 | 20 | 39 | 34 | 67 | 43 | Hist Veh control4 | − | 3 | 20 | 4.70–7.82 | 1.59–4.11 | n/a | n/a | Test item | | | | | | | | 500 μg/mL | + | 3 | 20 | 9 | 4 | 10 | 4 | 1000 μg/mL | + | 3 | 20 | 9 | 5 | 10 | 6 | 2000 μg/mL | + | 3 | 20 | 9 | 3 | 9 | 3 | Vehicle control | + | 3 | 20 | 7 | 4 | 8 | 4 | Positive control | + | 3 | 20 | 51 | 44 | 86 | 63 | Hist Veh control4 | + | 3 | 20 | 4.66–8.12 | 1.69–4.35 | n/a | n/a |
| Experiment B2 | Test item | | | | | | | | 500 μg/mL | − | 20 | 20 | 7 | 3 | 8 | 4 | 1000 μg/mL | − | 20 | 20 | 8 | 5 | 8 | 5 | 2000 μg/mL | − | 20 | 20 | 7 | 4 | 7 | 4 | Vehicle control | − | 20 | 20 | 7 | 3 | 7 | 3 | Positive control | − | 20 | 20 | 45 | 41 | 84 | 58 | Hist Veh Control4 | − | 20 | 20 | 4.44–7.90 | 1.60–4.27 | n/a | n/a |
| Experiment B3 | Test item | | | | | | | | 500 μg/mL | − | 20 | 28 | 9 | 4 | 9 | 4 | 1000 μg/mL | − | 20 | 28 | 9 | 3 | 10 | 3 | 2000 μg/mL | − | 20 | 28 | 8 | 4 | 8 | 4 | Vehicle control | − | 20 | 28 | 8 | 3 | 8 | 3 | Positive control | − | 20 | 28 | 45 | 41 | 78 | 53 | Hist Veh control4 | − | 20 | 28 | 4.31–7.77 | 1.59–4.11 | n/a | n/a | Test item | | | | | | | | 500 μg/mL | + | 3 | 28 | 8 | 4 | 9 | 4 | 1000 μg/mL | + | 3 | 28 | 8 | 4 | 9 | 4 | 2000 μg/mL | + | 3 | 28 | 9 | 4 | 9 | 4 | Vehicle control | + | 3 | 28 | 9 | 3 | 9 | 3 | Positive control | + | 3 | 28 | 47 | 39 | 70 | 50 | Hist Veh control4 | + | 3 | 28 | 4.96–7.56 | 1.92–4.12 | n/a | n/a |
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Abbreviations: n/a: not applicable; Veh: vehicle; Hist: historical; incl: including; excl: excluding; 1Positive controls: (−S9): Ethyl methanesulfonate (1.0 μL/mL); (+S9): Cyclophosphamide (5.0 μg/mL); 2Positive control: (−S9): Ethyl methanesulfonate (0.4 μL/mL); 3Positive controls: (−S9) Ethyl methanesulfonate (0.4 μL/mL); (+S9): Cyclophosphamide (5.0 μg/mL); 4Numbers reported are the 95% confidence interval. ; , to the concurrent vehicle control and to the historical vehicle control. |