TABLE 1.
Hematologic variables, BWs, and relative tissue weights of 3-mo-old male and female mice fed an adequate-iron diet with adequate copper content for 4 wk (study 2)1
Sex, genotype | Hemoglobin, g/dL | Hematocrit, % | BW, g | Liver/BW, % | Kidney/BW, % | Heart/BW, % |
---|---|---|---|---|---|---|
Male, Dmt1fl/fl | 15.3 ± 1.0 | 59.5 ± 6.6 | 29.2 ± 3.7a | 4.07 ± 0.39 | 1.26 ± 0.14 | 0.47 ± 0.08c |
Male, Dmt1int/int | 1.5 ± 0.2 | 7.4 ± 1.7 | 19.4 ± 1.7c | 3.41 ± 0.26 | 1.58 ± 0.12 | 1.82 ± 0.28a |
Female, Dmt1fl/fl | 15.4 ± 0.8 | 60.4 ± 3.7 | 22.1 ± 2.3b | 3.71 ± 0.38 | 1.04 ± 0.06 | 0.45 ± 0.03c |
Female, Dmt1int/int | 1.8 ± 0.4 | 10.4 ± 2.9 | 21.1 ± 1.9b,c | 3.16 ± 0.27 | 1.31 ± 0.07 | 1.16 ± 0.33b |
Two-way interactions and main effects, P | ||||||
Sex | 0.30 | 0.10 | 0.0001 | 0.0009 | <0.0001 | <0.0001 |
Genotype | <0.0001 | <0.0001 | <0.0001 | 0.0001 | <0.0001 | <0.0001 |
Sex × genotype | 0.39 | 0.36 | <0.0001 | 0.52 | 0.82 | <0.0001 |
Values are means ± SDs, n = 13–16/group. Data were analyzed by 2-factor ANOVA. Labeled means without a common superscript letter differ, P < 0.05. None of the physiological variables assessed here changed when mice were fed an adequate-iron diet with high copper content (data not shown). BW, body weight; Dmt1, divalent metal-ion transporter 1; Dmt1fl/fl mice, phenotypically normal mice with the Slc11a2 gene “floxed”; Dmt1int/int mice, intestine-specific Dmt1 knockout mice.