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result sql = Effect of endogenous and synthetic antioxidants on hydrogen peroxide-induced guinea-pig colon contraction.
Effect of endogenous and synthetic antioxidants on hydrogen peroxide-induced guinea-pig colon contraction.
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char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = e;code = 101
char = a;code = 97
char = c;code = 99
char = h;code = 104
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 = t;code = 116
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = d;code = 100
char = s;code = 115
char = :;code = 58
char = ;code = 32
char = M;code = 77
char = G;code = 71
char = C;code = 67
char = D;code = 68
char = 0;code = 48
char = 1;code = 49
char = 0;code = 48
char = 3;code = 51
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = p;code = 112
char = h;code = 104
char = a;code = 97
char = -;code = 45
char = l;code = 108
char = i;code = 105
char = p;code = 112
char = o;code = 111
char = i;code = 105
char = c;code = 99
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char = a;code = 97
char = c;code = 99
char = i;code = 105
char = d;code = 100
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = w;code = 119
char = o;code = 111
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 = i;code = 105
char = r;code = 114
char = ;code = 32
char = h;code = 104
char = y;code = 121
char = b;code = 98
char = r;code = 114
char = i;code = 105
char = d;code = 100
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = U;code = 85
char = C;code = 67
char = L;code = 76
char = ;code = 32
char = M;code = 77
char = 0;code = 48
char = 8;code = 56
char = 4;code = 52
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = U;code = 85
char = C;code = 67
char = L;code = 76
char = ;code = 32
char = M;code = 77
char = 1;code = 49
char = 0;code = 48
char = 9;code = 57
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 = N;code = 78
char = a;code = 97
char = F;code = 70
char = ;code = 32
char = (;code = 40
char = 1;code = 49
char = 0;code = 48
char = ;code = 32
char = m;code = 109
char = M;code = 77
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = b;code = 98
char = a;code = 97
char = c;code = 99
char = h;code = 104
char = o;code = 111
char = l;code = 108
char = ;code = 32
char = (;code = 40
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 5;code = 53
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = M;code = 77
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = 0;code = 48
char = .;code = 46
char = 1;code = 49
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = M;code = 77
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
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 = 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 = ;code = 32
char = (;code = 40
char = 1;code = 49
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = M;code = 77
char = );code = 41
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = G;code = 71
char = p;code = 112
char = c;code = 99
char = c;code = 99
char = ;code = 32
char = o;code = 111
char = f;code = 102
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 = 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 = a;code = 97
char = b;code = 98
char = o;code = 111
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = a;code = 97
char = s;code = 115
char = a;code = 97
char = l;code = 108
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 = 46
char = ;code = 32
char = W;code = 87
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 = e;code = 101
char = x;code = 120
char = c;code = 99
char = e;code = 101
char = p;code = 112
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 = M;code = 77
char = G;code = 71
char = C;code = 67
char = D;code = 68
char = 0;code = 48
char = 1;code = 49
char = 0;code = 48
char = 3;code = 51
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 = 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 = ,;code = 44
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = ;code = 32
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = d;code = 100
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = 1;code = 49
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = M;code = 77
char = -;code = 45
char = M;code = 77
char = G;code = 71
char = C;code = 67
char = D;code = 68
char = 0;code = 48
char = 1;code = 49
char = 0;code = 48
char = 3;code = 51
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = p;code = 112
char = h;code = 104
char = a;code = 97
char = -;code = 45
char = l;code = 108
char = i;code = 105
char = p;code = 112
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 = 44
char = ;code = 32
char = U;code = 85
char = C;code = 67
char = L;code = 76
char = ;code = 32
char = M;code = 77
char = 0;code = 48
char = 8;code = 56
char = 4;code = 52
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = U;code = 85
char = C;code = 67
char = L;code = 76
char = ;code = 32
char = M;code = 77
char = 1;code = 49
char = 0;code = 48
char = 9;code = 57
char = -;code = 45
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = d;code = 100
char = u;code = 117
char = c;code = 99
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 = i;code = 105
char = n;code = 110
char = h;code = 104
char = i;code = 105
char = b;code = 98
char = i;code = 105
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 = 3;code = 51
char = 5;code = 53
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 = G;code = 71
char = p;code = 112
char = c;code = 99
char = c;code = 99
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = y;code = 121
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 = 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 = ,;code = 44
char = ;code = 32
char = N;code = 78
char = a;code = 97
char = F;code = 70
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = b;code = 98
char = a;code = 97
char = c;code = 99
char = h;code = 104
char = o;code = 111
char = l;code = 108
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = u;code = 117
char = g;code = 103
char = h;code = 104
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = h;code = 104
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = o;code = 111
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = b;code = 98
char = u;code = 117
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = -;code = 45
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = G;code = 71
char = p;code = 112
char = c;code = 99
char = c;code = 99
char = .;code = 46
char = ;code = 32
char = B;code = 66
char = e;code = 101
char = n;code = 110
char = z;code = 122
char = a;code = 97
char = l;code = 108
char = k;code = 107
char = o;code = 111
char = n;code = 110
char = i;code = 105
char = u;code = 117
char = m;code = 109
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = l;code = 108
char = o;code = 111
char = r;code = 114
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = B;code = 66
char = c;code = 99
char = l;code = 108
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = G;code = 71
char = -;code = 45
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = h;code = 104
char = i;code = 105
char = b;code = 98
char = i;code = 105
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = ,;code = 44
char = ;code = 32
char = r;code = 114
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char = d;code = 100
char = u;code = 117
char = c;code = 99
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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 = 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 = -;code = 45
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = G;code = 71
char = p;code = 112
char = c;code = 99
char = c;code = 99
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char = b;code = 98
char = y;code = 121
char = ;code = 32
char = 3;code = 51
char = 5;code = 53
char = %;code = 37
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
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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 = 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 = C;code = 67
char = o;code = 111
char = n;code = 110
char = t;code = 116
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 = b;code = 98
char = y;code = 121
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char = s;code = 115
char = t;code = 116
char = i;code = 105
char = m;code = 109
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char = l;code = 108
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = s;code = 115
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char = u;code = 117
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 = i;code = 105
char = n;code = 110
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = G;code = 71
char = p;code = 112
char = c;code = 99
char = c;code = 99
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char = i;code = 105
char = s;code = 115
char = ;code = 32
char = k;code = 107
char = n;code = 110
char = o;code = 111
char = w;code = 119
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = v;code = 118
char = o;code = 111
char = l;code = 108
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = G;code = 71
char = -;code = 45
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = t;code = 116
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = ;code = 32
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = m;code = 109
char = p;code = 112
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = d;code = 100
char = s;code = 115
char = -;code = 45
char = M;code = 77
char = G;code = 71
char = C;code = 67
char = D;code = 68
char = 0;code = 48
char = 1;code = 49
char = 0;code = 48
char = 3;code = 51
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = p;code = 112
char = h;code = 104
char = a;code = 97
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char = l;code = 108
char = i;code = 105
char = p;code = 112
char = o;code = 111
char = i;code = 105
char = c;code = 99
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char = a;code = 97
char = c;code = 99
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char = d;code = 100
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = w;code = 119
char = o;code = 111
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 = i;code = 105
char = r;code = 114
char = ;code = 32
char = h;code = 104
char = y;code = 121
char = b;code = 98
char = r;code = 114
char = i;code = 105
char = d;code = 100
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = U;code = 85
char = C;code = 67
char = L;code = 76
char = ;code = 32
char = M;code = 77
char = 0;code = 48
char = 8;code = 56
char = 4;code = 52
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = U;code = 85
char = C;code = 67
char = L;code = 76
char = ;code = 32
char = M;code = 77
char = 1;code = 49
char = 0;code = 48
char = 9;code = 57
char = -;code = 45
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = G;code = 71
char = p;code = 112
char = c;code = 99
char = c;code = 99
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = y;code = 121
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result sql = OBJECTIVES AND DESIGN : The effects of the endogenous antioxidant alpha-lipoic acid on guinea pig colon smooth muscle contraction (Gpcc) induced by hydrogen peroxide were examined. Having previously shown that the histone deacetylase (HDAC) benzamide inhibitor MGCD0103 inhibits guinea-pig smooth muscle contraction, as do various sulfur-containing antioxidants, we asked whether hybrid compounds possessing both alpha-lipoic acid-derived antioxidant properties and HDAC inhibitory activity could inhibit Gpcc.

MATERIALS AND METHODS : Guinea pig colon (Gpc) was incubated at 37 degrees C with Krebs buffer; the four stimulants-hydrogen peroxide, carbachol, histamine, and sodium fluoride-were added independently. The response to each stimulant alone was compared with that in the presence of each of the test compounds: MGCD0103, alpha-lipoic acid, and two of their hybrids, UCL M084 and UCL M109.

RESULTS : NaF (10 mM), carbachol (0.05 microM), histamine (0.1 microM), and hydrogen peroxide (1 microM) produced Gpcc of about 50-60% above basal level. With the exception of MGCD0103 against hydrogen peroxide, all four test compounds at 1 microM-MGCD0103, alpha-lipoic acid, UCL M084, and UCL M109-produced a significant inhibition of 35-60% of Gpcc induced by hydrogen peroxide, NaF, and carbachol, although none reduced histamine or ovalbumin-induced Gpcc. Benzalkonium chloride (Bcl), a G-protein inhibitor, reduced the hydrogen peroxide-induced Gpcc by 35%.

CONCLUSIONS : Contraction by stimulants used to induce Gpcc is known to involve G-proteins. All four test compounds-MGCD0103, alpha-lipoic acid and two of their hybrids, UCL M084 and UCL M109-reduced Gpcc induced by NaF and carbachol, suggesting that G-protein pathway involvement is relevant to the action of the test compounds, as is also indicated by the Bcl-induced inhibition of hydrogen peroxide-induced contractions. Additionally, alpha-lipoic acid and the two hybrids showed >30% inhibition of hydrogen peroxide-induced contractions, consistent with the antioxidant properties of the 1,2-dithiolane ring.

Publication: Inflamm. Res. 2010 Mar ;59 Suppl 2:S231-3. :doi: 10.1007/s00011-009-0136-1.
Publication Date: 2010 Mar
Study Author(s): Wan, B Y C;Mann, S;Assem, E S K;Marson, C M;
Institution: Department of Chemistry, University College London, London, UK.
Shortcut link to this study:
OBJECTIVES AND DESIGN : The effects of the endogenous antioxidant alpha-lipoic acid on guinea pig colon smooth muscle contraction (Gpcc) induced by hydrogen peroxide were examined. Having previously shown that the histone deacetylase (HDAC) benzamide inhibitor MGCD0103 inhibits guinea-pig smooth muscle contraction, as do various sulfur-containing antioxidants, we asked whether hybrid compounds possessing both alpha-lipoic acid-derived antioxidant properties and HDAC inhibitory activity could inhibit Gpcc.

MATERIALS AND METHODS : Guinea pig colon (Gpc) was incubated at 37 degrees C with Krebs buffer; the four stimulants-hydrogen peroxide, carbachol, histamine, and sodium fluoride-were added independently. The response to each stimulant alone was compared with that in the presence of each of the test compounds: MGCD0103, alpha-lipoic acid, and two of their hybrids, UCL M084 and UCL M109.

RESULTS : NaF (10 mM), carbachol (0.05 microM), histamine (0.1 microM), and hydrogen peroxide (1 microM) produced Gpcc of about 50-60% above basal level. With the exception of MGCD0103 against hydrogen peroxide, all four test compounds at 1 microM-MGCD0103, alpha-lipoic acid, UCL M084, and UCL M109-produced a significant inhibition of 35-60% of Gpcc induced by hydrogen peroxide, NaF, and carbachol, although none reduced histamine or ovalbumin-induced Gpcc. Benzalkonium chloride (Bcl), a G-protein inhibitor, reduced the hydrogen peroxide-induced Gpcc by 35%.

CONCLUSIONS : Contraction by stimulants used to induce Gpcc is known to involve G-proteins. All four test compounds-MGCD0103, alpha-lipoic acid and two of their hybrids, UCL M084 and UCL M109-reduced Gpcc induced by NaF and carbachol, suggesting that G-protein pathway involvement is relevant to the action of the test compounds, as is also indicated by the Bcl-induced inhibition of hydrogen peroxide-induced contractions. Additionally, alpha-lipoic acid and the two hybrids showed >30% inhibition of hydrogen peroxide-induced contractions, consistent with the antioxidant properties of the 1,2-dithiolane ring.
PMID: 20033256

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