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char = r;code = 114
char = u;code = 117
char = p;code = 112
char = t;code = 116
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char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
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char = e;code = 101
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char = r;code = 114
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char = e;code = 101
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char = i;code = 105
char = c;code = 99
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char = (;code = 40
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char = d;code = 100
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char = i;code = 105
char = o;code = 111
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char = ;code = 32
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char = t;code = 116
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = );code = 41
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
char = l;code = 108
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = s;code = 115
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = o;code = 111
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char = s;code = 115
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = h;code = 104
char = e;code = 101
char = n;code = 110
char = o;code = 111
char = t;code = 116
char = y;code = 121
char = p;code = 112
char = e;code = 101
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = m;code = 109
char = e;code = 101
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char = h;code = 104
char = y;code = 121
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = r;code = 114
char = i;code = 105
char = b;code = 98
char = u;code = 117
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = a;code = 97
char = d;code = 100
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = .;code = 46
result sql = Disruption of the arsenic (+3 oxidation state) methyltransferase gene in the mouse alters the phenotype for methylation of arsenic and affects distribution and retention of orally administered arsenate.
Disruption of the arsenic (+3 oxidation state) methyltransferase gene in the mouse alters the phenotype for methylation of arsenic and affects distribution and retention of orally administered arsenate.
char = T;code = 84
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char = ;code = 32
char = a;code = 97
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char = s;code = 115
char = e;code = 101
char = n;code = 110
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = (;code = 40
char = +;code = 43
char = 3;code = 51
char = ;code = 32
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = d;code = 100
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char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = ;code = 32
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = );code = 41
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
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char = a;code = 97
char = n;code = 110
char = s;code = 115
char = f;code = 102
char = e;code = 101
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char = s;code = 115
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = A;code = 65
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char = 3;code = 51
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char = g;code = 103
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char = k;code = 107
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char = a;code = 97
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char = c;code = 99
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char = A;code = 65
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char = e;code = 101
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char = e;code = 101
char = d;code = 100
char = ;code = 32
char = e;code = 101
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char = s;code = 115
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char = o;code = 111
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char = A;code = 65
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char = l;code = 108
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char = ;code = 32
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char = ;code = 32
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char = B;code = 66
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char = ,;code = 44
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char = a;code = 97
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char = l;code = 108
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 5;code = 53
char = ;code = 32
char = m;code = 109
char = g;code = 103
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = k;code = 107
char = g;code = 103
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = [;code = 91
char = (;code = 40
char = 7;code = 55
char = 3;code = 51
char = );code = 41
char = A;code = 65
char = s;code = 115
char = ];code = 93
char = -;code = 45
char = a;code = 97
char = r;code = 114
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = M;code = 77
char = i;code = 105
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = d;code = 100
char = i;code = 105
char = o;code = 111
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = a;code = 97
char = y;code = 121
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = u;code = 117
char = p;code = 112
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = 9;code = 57
char = 6;code = 54
char = ;code = 32
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = f;code = 102
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;;code = 59
char = ;code = 32
char = t;code = 116
char = i;code = 105
char = s;code = 115
char = s;code = 115
char = u;code = 117
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = l;code = 108
char = l;code = 108
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = 2;code = 50
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 2;code = 50
char = 4;code = 52
char = ;code = 32
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = f;code = 102
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = t;code = 116
char = ;code = 32
char = 2;code = 50
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 2;code = 50
char = 4;code = 52
char = ;code = 32
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = f;code = 102
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ,;code = 44
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = A;code = 65
char = s;code = 115
char = 3;code = 51
char = m;code = 109
char = t;code = 116
char = ;code = 32
char = k;code = 107
char = n;code = 110
char = o;code = 111
char = c;code = 99
char = k;code = 107
char = o;code = 111
char = u;code = 117
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = g;code = 103
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = p;code = 112
char = o;code = 111
char = r;code = 114
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = o;code = 111
char = r;code = 114
char = g;code = 103
char = a;code = 97
char = n;code = 110
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = n;code = 110
char = o;code = 111
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = C;code = 67
char = 5;code = 53
char = 7;code = 55
char = B;code = 66
char = L;code = 76
char = /;code = 47
char = 6;code = 54
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = m;code = 109
char = i;code = 105
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = o;code = 111
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = o;code = 111
char = r;code = 114
char = g;code = 103
char = a;code = 97
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char = i;code = 105
char = c;code = 99
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char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = n;code = 110
char = o;code = 111
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
char = l;code = 108
char = a;code = 97
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char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = s;code = 115
char = e;code = 101
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char = i;code = 105
char = c;code = 99
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = u;code = 117
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = e;code = 101
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = A;code = 65
char = s;code = 115
char = 3;code = 51
char = m;code = 109
char = t;code = 116
char = ;code = 32
char = k;code = 107
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char = o;code = 111
char = c;code = 99
char = k;code = 107
char = o;code = 111
char = u;code = 117
char = t;code = 116
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = t;code = 116
char = ;code = 32
char = 2;code = 50
char = 4;code = 52
char = ;code = 32
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = f;code = 102
char = t;code = 116
char = e;code = 101
char = r;code = 114
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char = d;code = 100
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ,;code = 44
char = ;code = 32
char = A;code = 65
char = s;code = 115
char = 3;code = 51
char = m;code = 109
char = t;code = 116
char = ;code = 32
char = k;code = 107
char = n;code = 110
char = o;code = 111
char = c;code = 99
char = k;code = 107
char = o;code = 111
char = u;code = 117
char = t;code = 116
char = s;code = 115
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char = r;code = 114
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char = t;code = 116
char = a;code = 97
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char = n;code = 110
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = g;code = 103
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char = f;code = 102
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = l;code = 108
char = y;code = 121
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char = h;code = 104
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = e;code = 101
char = r;code = 114
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char = p;code = 112
char = e;code = 101
char = r;code = 114
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char = e;code = 101
char = n;code = 110
char = t;code = 116
char = a;code = 97
char = g;code = 103
char = e;code = 101
char = s;code = 115
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = s;code = 115
char = e;code = 101
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char = i;code = 105
char = c;code = 99
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = s;code = 115
char = e;code = 101
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char = i;code = 105
char = n;code = 110
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char = l;code = 108
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = ,;code = 44
char = ;code = 32
char = k;code = 107
char = i;code = 105
char = d;code = 100
char = n;code = 110
char = e;code = 101
char = y;code = 121
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = u;code = 117
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = r;code = 114
char = y;code = 121
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char = b;code = 98
char = l;code = 108
char = a;code = 97
char = d;code = 100
char = d;code = 100
char = e;code = 101
char = r;code = 114
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char = ;code = 32
char = l;code = 108
char = u;code = 117
char = n;code = 110
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char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = h;code = 104
char = e;code = 101
char = a;code = 97
char = r;code = 114
char = t;code = 116
char = ,;code = 44
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = c;code = 99
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = C;code = 67
char = 5;code = 53
char = 7;code = 55
char = B;code = 66
char = L;code = 76
char = /;code = 47
char = 6;code = 54
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = W;code = 87
char = h;code = 104
char = o;code = 111
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = o;code = 111
char = d;code = 100
char = y;code = 121
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char = c;code = 99
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char = e;code = 101
char = a;code = 97
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char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = [;code = 91
char = (;code = 40
char = 7;code = 55
char = 3;code = 51
char = );code = 41
char = A;code = 65
char = s;code = 115
char = ];code = 93
char = ;code = 32
char = i;code = 105
char = n;code = 110
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char = A;code = 65
char = s;code = 115
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char = m;code = 109
char = t;code = 116
char = ;code = 32
char = k;code = 107
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char = c;code = 99
char = k;code = 107
char = o;code = 111
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char = t;code = 116
char = s;code = 115
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char = w;code = 119
char = a;code = 97
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char = ;code = 32
char = s;code = 115
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char = b;code = 98
char = s;code = 115
char = t;code = 116
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char = a;code = 97
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char = e;code = 101
char = r;code = 114
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char = t;code = 116
char = h;code = 104
char = a;code = 97
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char = i;code = 105
char = n;code = 110
char = ;code = 32
char = C;code = 67
char = 5;code = 53
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char = B;code = 66
char = L;code = 76
char = /;code = 47
char = 6;code = 54
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char = m;code = 109
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char = c;code = 99
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = t;code = 116
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char = 2;code = 50
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char = ;code = 32
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = f;code = 102
char = t;code = 116
char = e;code = 101
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char = d;code = 100
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char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ,;code = 44
char = ;code = 32
char = A;code = 65
char = s;code = 115
char = 3;code = 51
char = m;code = 109
char = t;code = 116
char = ;code = 32
char = k;code = 107
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char = o;code = 111
char = c;code = 99
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char = t;code = 116
char = s;code = 115
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char = r;code = 114
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char = t;code = 116
char = a;code = 97
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char = n;code = 110
char = e;code = 101
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char = ;code = 32
char = a;code = 97
char = b;code = 98
char = o;code = 111
char = u;code = 117
char = t;code = 116
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char = 5;code = 53
char = 0;code = 48
char = %;code = 37
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = C;code = 67
char = 5;code = 53
char = 7;code = 55
char = B;code = 66
char = L;code = 76
char = /;code = 47
char = 6;code = 54
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = b;code = 98
char = o;code = 111
char = u;code = 117
char = t;code = 116
char = ;code = 32
char = 6;code = 54
char = %;code = 37
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = f;code = 102
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = 9;code = 57
char = 6;code = 54
char = ;code = 32
char = h;code = 104
char = ,;code = 44
char = ;code = 32
char = A;code = 65
char = s;code = 115
char = 3;code = 51
char = m;code = 109
char = t;code = 116
char = ;code = 32
char = k;code = 107
char = n;code = 110
char = o;code = 111
char = c;code = 99
char = k;code = 107
char = o;code = 111
char = u;code = 117
char = t;code = 116
char = s;code = 115
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char = r;code = 114
char = e;code = 101
char = t;code = 116
char = a;code = 97
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char = n;code = 110
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = b;code = 98
char = o;code = 111
char = u;code = 117
char = t;code = 116
char = ;code = 32
char = 2;code = 50
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char = %;code = 37
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = C;code = 67
char = 5;code = 53
char = 7;code = 55
char = B;code = 66
char = L;code = 76
char = /;code = 47
char = 6;code = 54
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = e;code = 101
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char = r;code = 114
char = e;code = 101
char = t;code = 116
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = l;code = 108
char = e;code = 101
char = s;code = 115
char = s;code = 115
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char = t;code = 116
char = h;code = 104
char = a;code = 97
char = n;code = 110
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char = 2;code = 50
char = %;code = 37
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = s;code = 115
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result sql = The arsenic (+3 oxidation state) methyltransferase (As3mt) gene encodes a 43 kDa protein that catalyzes methylation of inorganic arsenic. Altered expression of AS3MT in cultured human cells controls arsenic methylation phenotypes, suggesting a critical role in arsenic metabolism. Because methylated arsenicals mediate some toxic or carcinogenic effects linked to inorganic arsenic exposure, studies of the fate and effects of arsenicals in mice which cannot methylate arsenic could be instructive. This study compared retention and distribution of arsenic in As3mt knockout mice and in wild-type C57BL/6 mice in which expression of the As3mt gene is normal. Male and female mice of either genotype received an oral dose of 0.5 mg of arsenic as arsenate per kg containing [(73)As]-arsenate. Mice were radioassayed for up to 96 h after dosing; tissues were collected at 2 and 24 h after dosing. At 2 and 24 h after dosing, livers of As3mt knockouts contained a greater proportion of inorganic and monomethylated arsenic than did livers of C57BL/6 mice. A similar predominance of inorganic and monomethylated arsenic was found in the urine of As3mt knockouts. At 24 h after dosing, As3mt knockouts retained significantly higher percentages of arsenic dose in liver, kidneys, urinary bladder, lungs, heart, and carcass than did C57BL/6 mice. Whole body clearance of [(73)As] in As3mt knockouts was substantially slower than in C57BL/6 mice. At 24 h after dosing, As3mt knockouts retained about 50% and C57BL/6 mice about 6% of the dose. After 96 h, As3mt knockouts retained about 20% and C57BL/6 mice retained less than 2% of the dose. These data confirm a central role for As3mt in the metabolism of inorganic arsenic and indicate that phenotypes for arsenic retention and distribution are markedly affected by the null genotype for arsenic methylation, indicating a close linkage between the metabolism and retention of arsenicals.

Publication: Chem. Res. Toxicol. 2009 Oct ;22(10)::1713-20. :doi: 10.1021/tx900179r.
Publication Date: 2009 Oct
Study Author(s): Drobna, Zuzana;Naranmandura, Hua;Kubachka, Kevin M;Edwards, Brenda C;Herbin-Davis, Karen;Styblo, Miroslav;Le, X Chris;Creed, John T;Maeda, Noboyu;Hughes, Michael F;Thomas, David J;
Institution: Department of Nutrition, University of North Carolina, Chapel Hill, North Carolina 27599, USA.
Shortcut link to this study:
The arsenic (+3 oxidation state) methyltransferase (As3mt) gene encodes a 43 kDa protein that catalyzes methylation of inorganic arsenic. Altered expression of AS3MT in cultured human cells controls arsenic methylation phenotypes, suggesting a critical role in arsenic metabolism. Because methylated arsenicals mediate some toxic or carcinogenic effects linked to inorganic arsenic exposure, studies of the fate and effects of arsenicals in mice which cannot methylate arsenic could be instructive. This study compared retention and distribution of arsenic in As3mt knockout mice and in wild-type C57BL/6 mice in which expression of the As3mt gene is normal. Male and female mice of either genotype received an oral dose of 0.5 mg of arsenic as arsenate per kg containing [(73)As]-arsenate. Mice were radioassayed for up to 96 h after dosing; tissues were collected at 2 and 24 h after dosing. At 2 and 24 h after dosing, livers of As3mt knockouts contained a greater proportion of inorganic and monomethylated arsenic than did livers of C57BL/6 mice. A similar predominance of inorganic and monomethylated arsenic was found in the urine of As3mt knockouts. At 24 h after dosing, As3mt knockouts retained significantly higher percentages of arsenic dose in liver, kidneys, urinary bladder, lungs, heart, and carcass than did C57BL/6 mice. Whole body clearance of [(73)As] in As3mt knockouts was substantially slower than in C57BL/6 mice. At 24 h after dosing, As3mt knockouts retained about 50% and C57BL/6 mice about 6% of the dose. After 96 h, As3mt knockouts retained about 20% and C57BL/6 mice retained less than 2% of the dose. These data confirm a central role for As3mt in the metabolism of inorganic arsenic and indicate that phenotypes for arsenic retention and distribution are markedly affected by the null genotype for arsenic methylation, indicating a close linkage between the metabolism and retention of arsenicals.
PMID: 19691357

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