char = S;code = 83
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = z;code = 122
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = c;code = 99
char = o;code = 111
char = s;code = 115
char = a;code = 97
char = h;code = 104
char = e;code = 101
char = x;code = 120
char = a;code = 97
char = e;code = 101
char = n;code = 110
char = o;code = 111
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = (;code = 40
char = D;code = 68
char = H;code = 72
char = A;code = 65
char = );code = 41
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = b;code = 98
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = t;code = 116
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 = c;code = 99
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = y;code = 121
char = c;code = 99
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = u;code = 117
char = g;code = 103
char = h;code = 104
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 = g;code = 103
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 = p;code = 112
char = e;code = 101
char = r;code = 114
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = d;code = 100
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = G;code = 71
char = P;code = 80
char = x;code = 120
char = 1;code = 49
char = );code = 41
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = p;code = 112
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = e;code = 101
char = .;code = 46
result sql = Sensitization by docosahexaenoic acid (DHA) of breast cancer cells to anthracyclines through loss of glutathione peroxidase (GPx1) response.
Sensitization by docosahexaenoic acid (DHA) of breast cancer cells to anthracyclines through loss of glutathione peroxidase (GPx1) response.
char = D;code = 68
char = o;code = 111
char = c;code = 99
char = o;code = 111
char = s;code = 115
char = a;code = 97
char = h;code = 104
char = e;code = 101
char = x;code = 120
char = a;code = 97
char = e;code = 101
char = n;code = 110
char = o;code = 111
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = (;code = 40
char = D;code = 68
char = H;code = 72
char = A;code = 65
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = p;code = 112
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = i;code = 105
char = g;code = 103
char = i;code = 105
char = n;code = 110
char = );code = 41
char = ;code = 32
char = h;code = 104
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = e;code = 101
char = n;code = 110
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 = e;code = 101
char = n;code = 110
char = h;code = 104
char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = h;code = 104
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 = o;code = 111
char = f;code = 102
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = i;code = 105
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 = d;code = 100
char = r;code = 114
char = u;code = 117
char = g;code = 103
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = u;code = 117
char = g;code = 103
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = d;code = 100
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = c;code = 99
char = h;code = 104
char = a;code = 97
char = n;code = 110
char = i;code = 105
char = s;code = 115
char = m;code = 109
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = o;code = 111
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = a;code = 97
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = e;code = 101
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 = b;code = 98
char = e;code = 101
char = t;code = 116
char = w;code = 119
char = e;code = 101
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = e;code = 101
char = m;code = 109
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = z;code = 122
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = D;code = 68
char = H;code = 72
char = A;code = 65
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = u;code = 117
char = m;code = 109
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = c;code = 99
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = d;code = 100
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = u;code = 117
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = w;code = 119
char = o;code = 111
char = ;code = 32
char = b;code = 98
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = t;code = 116
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 = c;code = 99
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = :;code = 58
char = ;code = 32
char = M;code = 77
char = D;code = 68
char = A;code = 65
char = -;code = 45
char = M;code = 77
char = B;code = 66
char = -;code = 45
char = 2;code = 50
char = 3;code = 51
char = 1;code = 49
char = ,;code = 44
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = w;code = 119
char = h;code = 104
char = i;code = 105
char = c;code = 99
char = h;code = 104
char = ;code = 32
char = D;code = 68
char = H;code = 72
char = A;code = 65
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 = s;code = 115
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = i;code = 105
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 = t;code = 116
char = o;code = 111
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = x;code = 120
char = o;code = 111
char = r;code = 114
char = u;code = 117
char = b;code = 98
char = i;code = 105
char = c;code = 99
char = i;code = 105
char = n;code = 110
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = M;code = 77
char = C;code = 67
char = F;code = 70
char = -;code = 45
char = 7;code = 55
char = ,;code = 44
char = ;code = 32
char = w;code = 119
char = h;code = 104
char = i;code = 105
char = c;code = 99
char = h;code = 104
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = t;code = 116
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = p;code = 112
char = o;code = 111
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = D;code = 68
char = H;code = 72
char = A;code = 65
char = .;code = 46
char = ;code = 32
char = U;code = 85
char = n;code = 110
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = x;code = 120
char = y;code = 121
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = p;code = 112
char = e;code = 101
char = c;code = 99
char = i;code = 105
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = R;code = 82
char = O;code = 79
char = S;code = 83
char = );code = 41
char = ;code = 32
char = l;code = 108
char = e;code = 101
char = v;code = 118
char = e;code = 101
char = l;code = 108
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 = o;code = 111
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = a;code = 97
char = c;code = 99
char = y;code = 121
char = c;code = 99
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = t;code = 116
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = M;code = 77
char = D;code = 68
char = A;code = 65
char = -;code = 45
char = M;code = 77
char = B;code = 66
char = -;code = 45
char = 2;code = 50
char = 3;code = 51
char = 1;code = 49
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = i;code = 105
char = t;code = 116
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = d;code = 100
char = e;code = 101
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 = c;code = 99
char = y;code = 121
char = t;code = 116
char = o;code = 111
char = s;code = 115
char = o;code = 111
char = l;code = 108
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = g;code = 103
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 = p;code = 112
char = e;code = 101
char = r;code = 114
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = d;code = 100
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = G;code = 71
char = P;code = 80
char = x;code = 120
char = 1;code = 49
char = );code = 41
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 = 44
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = c;code = 99
char = r;code = 114
char = u;code = 117
char = c;code = 99
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = e;code = 101
char = n;code = 110
char = z;code = 122
char = y;code = 121
char = m;code = 109
char = e;code = 101
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = e;code = 101
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 = g;code = 103
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = h;code = 104
char = y;code = 121
char = d;code = 100
char = r;code = 114
char = o;code = 111
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = p;code = 112
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = w;code = 119
char = h;code = 104
char = i;code = 105
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = j;code = 106
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = d;code = 100
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = e;code = 101
char = n;code = 110
char = z;code = 122
char = y;code = 121
char = m;code = 109
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 = i;code = 105
char = e;code = 101
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 = i;code = 105
char = n;code = 110
char = ;code = 32
char = b;code = 98
char = o;code = 111
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = c;code = 99
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = p;code = 112
char = o;code = 111
char = n;code = 110
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = R;code = 82
char = O;code = 79
char = S;code = 83
char = .;code = 46
char = ;code = 32
char = G;code = 71
char = P;code = 80
char = x;code = 120
char = -;code = 45
char = d;code = 100
char = e;code = 101
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 = a;code = 97
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = v;code = 118
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result sql = Docosahexaenoic acid (DHA, a lipid of marine origin) has been found to enhance the activity of several anticancer drugs through an oxidative mechanism. To examine the relation between chemosensitization by DHA and tumor cells antioxidant status, we used two breast cancer cell lines: MDA-MB-231, in which DHA increases sensitivity to doxorubicin, and MCF-7, which does not respond to DHA. Under these conditions, reactive oxygen species (ROS) level increased on anthracycline treatment only in MDA-MB-231. This was concomitant with a decreased cytosolic glutathione peroxidase (GPx1) activity, a crucial enzyme for protection against hydrogen and lipid peroxides, while major antioxidant enzyme activities increased in both cell lines in response to ROS. GPx-decreased activity was accompanied by an accumulation of glutathione, the GPx cosubstrate, and resulted from a decreased amount of GPx protein. In rat mammary tumors, when a DHA dietary supplementation led to an increased tumor sensitivity to anthracyclines, GPx1 activity was similarly decreased. Furthermore, vitamin E abolished both DHA effects on chemotherapy efficacy enhancement and on GPx1 inhibition. Thus, loss of GPx response to an oxidative stress in transformed cells may account for the ability of peroxidizable targets such as DHA to enhance tumor sensitivity to ROS-generating anticancer drugs.

Publication: Free Radic. Biol. Med. 2008 Apr 1 ;44(7)::1483-91. :doi: 10.1016/j.freeradbiomed.2008.01.009.
Publication Date: 2008 Apr 1
Study Author(s): Vibet, Sophie;Goupille, Caroline;Bougnoux, Philippe;Steghens, Jean-Paul;Goré, Jacques;Mahéo, Karine;
Institution: Inserm E-0211, Nutrition, Croissance et Cancer; Université François-Rabelais, Tours, France.
Shortcut link to this study:
Docosahexaenoic acid (DHA, a lipid of marine origin) has been found to enhance the activity of several anticancer drugs through an oxidative mechanism. To examine the relation between chemosensitization by DHA and tumor cells antioxidant status, we used two breast cancer cell lines: MDA-MB-231, in which DHA increases sensitivity to doxorubicin, and MCF-7, which does not respond to DHA. Under these conditions, reactive oxygen species (ROS) level increased on anthracycline treatment only in MDA-MB-231. This was concomitant with a decreased cytosolic glutathione peroxidase (GPx1) activity, a crucial enzyme for protection against hydrogen and lipid peroxides, while major antioxidant enzyme activities increased in both cell lines in response to ROS. GPx-decreased activity was accompanied by an accumulation of glutathione, the GPx cosubstrate, and resulted from a decreased amount of GPx protein. In rat mammary tumors, when a DHA dietary supplementation led to an increased tumor sensitivity to anthracyclines, GPx1 activity was similarly decreased. Furthermore, vitamin E abolished both DHA effects on chemotherapy efficacy enhancement and on GPx1 inhibition. Thus, loss of GPx response to an oxidative stress in transformed cells may account for the ability of peroxidizable targets such as DHA to enhance tumor sensitivity to ROS-generating anticancer drugs.
PMID: 18267129

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