char = G;code = 71
char = l;code = 108
char = u;code = 117
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = h;code = 104
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = S;code = 83
char = -;code = 45
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 = (;code = 40
char = G;code = 71
char = S;code = 83
char = T;code = 84
char = M;code = 77
char = 1;code = 49
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = G;code = 71
char = S;code = 83
char = T;code = 84
char = T;code = 84
char = 1;code = 49
char = );code = 41
char = -;code = 45
char = d;code = 100
char = e;code = 101
char = p;code = 112
char = e;code = 101
char = n;code = 110
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = k;code = 107
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = l;code = 108
char = o;code = 111
char = r;code = 114
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = r;code = 114
char = .;code = 46
result sql = Glutathione S-transferase (GSTM1 and GSTT1)-dependent risk for colorectal cancer.
Glutathione S-transferase (GSTM1 and GSTT1)-dependent risk for colorectal cancer.
char = <;code = 60
char = b;code = 98
char = >;code = 62
char = B;code = 66
char = A;code = 65
char = C;code = 67
char = K;code = 75
char = G;code = 71
char = R;code = 82
char = O;code = 79
char = U;code = 85
char = N;code = 78
char = D;code = 68
char = ;code = 32
char = :;code = 58
char = ;code = 32
char = <;code = 60
char = /;code = 47
char = b;code = 98
char = >;code = 62
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = G;code = 71
char = S;code = 83
char = T;code = 84
char = T;code = 84
char = 1;code = 49
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = G;code = 71
char = S;code = 83
char = T;code = 84
char = M;code = 77
char = 1;code = 49
char = ;code = 32
char = g;code = 103
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 = s;code = 115
char = ;code = 32
char = (;code = 40
char = n;code = 110
char = u;code = 117
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = g;code = 103
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 = s;code = 115
char = );code = 41
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = u;code = 117
char = l;code = 108
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = s;code = 115
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
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 = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = a;code = 97
char = r;code = 114
char = e;code = 101
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 = 1;code = 49
char = 0;code = 48
char = -;code = 45
char = 2;code = 50
char = 0;code = 48
char = %;code = 37
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 5;code = 53
char = 0;code = 48
char = -;code = 45
char = 6;code = 54
char = 0;code = 48
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 = p;code = 112
char = o;code = 111
char = p;code = 112
char = u;code = 117
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 = 44
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = l;code = 108
char = y;code = 121
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = >;code = 62
char = P;code = 80
char = A;code = 65
char = T;code = 84
char = I;code = 73
char = E;code = 69
char = N;code = 78
char = T;code = 84
char = S;code = 83
char = ;code = 32
char = A;code = 65
char = N;code = 78
char = D;code = 68
char = ;code = 32
char = M;code = 77
char = E;code = 69
char = T;code = 84
char = H;code = 72
char = O;code = 79
char = D;code = 68
char = S;code = 83
char = ;code = 32
char = :;code = 58
char = ;code = 32
char = <;code = 60
char = /;code = 47
char = b;code = 98
char = >;code = 62
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = G;code = 71
char = S;code = 83
char = T;code = 84
char = T;code = 84
char = 1;code = 49
char = -;code = 45
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = G;code = 71
char = S;code = 83
char = T;code = 84
char = M;code = 77
char = 1;code = 49
char = -;code = 45
char = d;code = 100
char = e;code = 101
char = p;code = 112
char = e;code = 101
char = n;code = 110
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = k;code = 107
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = o;code = 111
char = r;code = 114
char = a;code = 97
char = d;code = 100
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = l;code = 108
char = o;code = 111
char = r;code = 114
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = (;code = 40
char = C;code = 67
char = R;code = 82
char = C;code = 67
char = );code = 41
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = u;code = 117
char = d;code = 100
char = i;code = 105
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = 2;code = 50
char = 4;code = 52
char = 7;code = 55
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = c;code = 99
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = C;code = 67
char = R;code = 82
char = C;code = 67
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 2;code = 50
char = 9;code = 57
char = 6;code = 54
char = ;code = 32
char = h;code = 104
char = o;code = 111
char = s;code = 115
char = p;code = 112
char = i;code = 105
char = t;code = 116
char = a;code = 97
char = l;code = 108
char = -;code = 45
char = b;code = 98
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = l;code = 108
char = s;code = 115
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = >;code = 62
char = R;code = 82
char = E;code = 69
char = S;code = 83
char = U;code = 85
char = L;code = 76
char = T;code = 84
char = S;code = 83
char = ;code = 32
char = :;code = 58
char = ;code = 32
char = <;code = 60
char = /;code = 47
char = b;code = 98
char = >;code = 62
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = G;code = 71
char = S;code = 83
char = T;code = 84
char = T;code = 84
char = 1;code = 49
char = -;code = 45
char = n;code = 110
char = u;code = 117
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = g;code = 103
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 = 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 = t;code = 116
char = o;code = 111
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = ;code = 32
char = 1;code = 49
char = .;code = 46
char = 5;code = 53
char = ;code = 32
char = t;code = 116
char = i;code = 105
char = m;code = 109
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = C;code = 67
char = R;code = 82
char = C;code = 67
char = ;code = 32
char = p;code = 112
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = 1;code = 49
char = 7;code = 55
char = .;code = 46
char = 4;code = 52
char = %;code = 37
char = );code = 41
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = a;code = 97
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = l;code = 108
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = 1;code = 49
char = 1;code = 49
char = .;code = 46
char = 1;code = 49
char = %;code = 37
char = );code = 41
char = ;code = 32
char = (;code = 40
char = c;code = 99
char = r;code = 114
char = u;code = 117
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = O;code = 79
char = R;code = 82
char = ;code = 32
char = 1;code = 49
char = .;code = 46
char = 6;code = 54
char = ;;code = 59
char = ;code = 32
char = p;code = 112
char = ;code = 32
char = =;code = 61
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 3;code = 51
char = );code = 41
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = G;code = 71
char = S;code = 83
char = T;code = 84
char = M;code = 77
char = 1;code = 49
char = -;code = 45
char = n;code = 110
char = u;code = 117
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = g;code = 103
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 = 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 = t;code = 116
char = o;code = 111
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = ;code = 32
char = e;code = 101
char = q;code = 113
char = u;code = 117
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = l;code = 108
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = 5;code = 53
char = 3;code = 51
char = %;code = 37
char = );code = 41
char = .;code = 46
char = ;code = 32
char = M;code = 77
char = u;code = 117
char = l;code = 108
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = a;code = 97
char = r;code = 114
char = i;code = 105
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = y;code = 121
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = n;code = 110
char = i;code = 105
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 = ;code = 32
char = 1;code = 49
char = .;code = 46
char = 7;code = 55
char = -;code = 45
char = f;code = 102
char = o;code = 111
char = l;code = 108
char = d;code = 100
char = ;code = 32
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = k;code = 107
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = C;code = 67
char = R;code = 82
char = C;code = 67
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = o;code = 111
char = c;code = 99
char = i;code = 105
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = G;code = 71
char = S;code = 83
char = T;code = 84
char = T;code = 84
char = 1;code = 49
char = -;code = 45
char = n;code = 110
char = u;code = 117
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = g;code = 103
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 = s;code = 115
char = ;code = 32
char = (;code = 40
char = p;code = 112
char = ;code = 32
char = =;code = 61
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 4;code = 52
char = );code = 41
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = c;code = 99
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = 2;code = 50
char = .;code = 46
char = 9;code = 57
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = s;code = 115
char = m;code = 109
char = o;code = 111
char = k;code = 107
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = p;code = 112
char = ;code = 32
char = =;code = 61
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 2;code = 50
char = );code = 41
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
char = <;code = 60
char = b;code = 98
char = >;code = 62
char = C;code = 67
char = O;code = 79
char = N;code = 78
char = C;code = 67
char = L;code = 76
char = U;code = 85
char = S;code = 83
char = I;code = 73
char = O;code = 79
char = N;code = 78
char = ;code = 32
char = :;code = 58
char = ;code = 32
char = <;code = 60
char = /;code = 47
char = b;code = 98
char = >;code = 62
char = T;code = 84
char = h;code = 104
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = u;code = 117
char = d;code = 100
char = y;code = 121
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = v;code = 118
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = e;code = 101
char = v;code = 118
char = i;code = 105
char = d;code = 100
char = e;code = 101
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 = g;code = 103
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = -;code = 45
char = e;code = 101
char = n;code = 110
char = v;code = 118
char = i;code = 105
char = r;code = 114
char = o;code = 111
char = n;code = 110
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = c;code = 99
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 = i;code = 105
char = l;code = 108
char = l;code = 108
char = u;code = 117
char = s;code = 115
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = r;code = 114
char = t;code = 116
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 = f;code = 102
char = u;code = 117
char = r;code = 114
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = a;code = 97
char = r;code = 114
char = c;code = 99
char = h;code = 104
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = o;code = 111
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = s;code = 115
char = c;code = 99
char = e;code = 101
char = p;code = 112
char = t;code = 116
char = i;code = 105
char = b;code = 98
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = C;code = 67
char = R;code = 82
char = C;code = 67
char = .;code = 46
result sql = BACKGROUND : The deleted GSTT1 and GSTM1 genotypes (null genotypes) resulting in loss of transferase activity are found in 10-20% and 50-60% of the population, respectively.

PATIENTS AND METHODS : The GSTT1- and GSTM1-dependent risk for sporadic colorectal cancer (CRC) was studied in 247 incident CRC cases and 296 hospital-based controls.

RESULTS : The GSTT1-null genotype was found to be 1.5 times more prevalent in CRC patients (17.4%) compared with controls (11.1%) (crude OR 1.6; p = 0.03). The GSTM1-null genotype was found to be equally prevalent in cases and controls (53%). Multivariate analysis showed a significant 1.7-fold risk for CRC associated with the GSTT1-null genotypes (p = 0.04) and this increased to 2.9 for smokers (p = 0.02).

CONCLUSION : This study provides evidence of gene-environment interaction and illustrates the importance of further research into the role of genetic susceptibility for CRC.

Publication: Anticancer Res. 2002 Nov-Dec ;22(6A)::3399-403.
Publication Date: 2002 Nov-Dec
Study Author(s): Laso, N;Lafuente, M J;Mas, S;Trias, M;Ascaso, C;Molina, R;Ballesta, A;Rodriguez, F;Lafuente, A;
Institution: Department of Pharmacology, School of Medicine, IDIBAPS, University of Barcelona, Casanova 143, E-08036 Barcelona, Spain.
Shortcut link to this study:
BACKGROUND : The deleted GSTT1 and GSTM1 genotypes (null genotypes) resulting in loss of transferase activity are found in 10-20% and 50-60% of the population, respectively.

PATIENTS AND METHODS : The GSTT1- and GSTM1-dependent risk for sporadic colorectal cancer (CRC) was studied in 247 incident CRC cases and 296 hospital-based controls.

RESULTS : The GSTT1-null genotype was found to be 1.5 times more prevalent in CRC patients (17.4%) compared with controls (11.1%) (crude OR 1.6; p = 0.03). The GSTM1-null genotype was found to be equally prevalent in cases and controls (53%). Multivariate analysis showed a significant 1.7-fold risk for CRC associated with the GSTT1-null genotypes (p = 0.04) and this increased to 2.9 for smokers (p = 0.02).

CONCLUSION : This study provides evidence of gene-environment interaction and illustrates the importance of further research into the role of genetic susceptibility for CRC.
PMID: 12530094

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