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result sql = Caffeine and staurosporine enhance the cytotoxicity of cisplatin and camptothecin in human brain tumor cell lines.
Caffeine and staurosporine enhance the cytotoxicity of cisplatin and camptothecin in human brain tumor cell lines.
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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 = 1;code = 49
char = 0;code = 48
char = 0;code = 48
char = ;code = 32
char = n;code = 110
char = M;code = 77
char = ;code = 32
char = C;code = 67
char = P;code = 80
char = T;code = 84
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 = p;code = 112
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = a;code = 97
char = b;code = 98
char = s;code = 115
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 = 2;code = 50
char = ;code = 32
char = n;code = 110
char = M;code = 77
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = u;code = 117
char = r;code = 114
char = o;code = 111
char = s;code = 115
char = p;code = 112
char = o;code = 111
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = C;code = 67
char = a;code = 97
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = u;code = 117
char = r;code = 114
char = o;code = 111
char = s;code = 115
char = p;code = 112
char = o;code = 111
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = t;code = 116
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = u;code = 117
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = G;code = 71
char = 2;code = 50
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = l;code = 108
char = a;code = 97
char = y;code = 121
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 = b;code = 98
char = y;code = 121
char = ;code = 32
char = C;code = 67
char = D;code = 68
char = D;code = 68
char = P;code = 80
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = C;code = 67
char = P;code = 80
char = T;code = 84
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 = 32
char = C;code = 67
char = l;code = 108
char = o;code = 111
char = n;code = 110
char = o;code = 111
char = g;code = 103
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 = s;code = 115
char = a;code = 97
char = y;code = 121
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = u;code = 117
char = o;code = 111
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = p;code = 112
char = o;code = 111
char = s;code = 115
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = 2;code = 50
char = ;code = 32
char = m;code = 109
char = M;code = 77
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = b;code = 98
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = r;code = 114
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 = I;code = 73
char = D;code = 68
char = 5;code = 53
char = 0;code = 48
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = I;code = 73
char = D;code = 68
char = 9;code = 57
char = 0;code = 48
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = C;code = 67
char = D;code = 68
char = D;code = 68
char = P;code = 80
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = U;code = 85
char = 2;code = 50
char = 5;code = 53
char = 1;code = 49
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 = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = u;code = 117
char = t;code = 116
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 = l;code = 108
char = y;code = 121
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = p;code = 112
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = e;code = 101
char = f;code = 102
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = i;code = 105
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = y;code = 121
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = w;code = 119
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = y;code = 121
char = -;code = 45
char = f;code = 102
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = -;code = 45
char = h;code = 104
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = p;code = 112
char = o;code = 111
char = s;code = 115
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = 2;code = 50
char = ;code = 32
char = n;code = 110
char = M;code = 77
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = u;code = 117
char = r;code = 114
char = o;code = 111
char = s;code = 115
char = p;code = 112
char = o;code = 111
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = r;code = 114
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 = I;code = 73
char = D;code = 68
char = 5;code = 53
char = 0;code = 48
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = I;code = 73
char = D;code = 68
char = 9;code = 57
char = 0;code = 48
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = C;code = 67
char = P;code = 80
char = T;code = 84
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = D;code = 68
char = A;code = 65
char = O;code = 79
char = Y;code = 89
char = ;code = 32
char = c;code = 99
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = s;code = 115
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char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = u;code = 117
char = t;code = 116
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
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char = t;code = 116
char = l;code = 108
char = y;code = 121
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char = a;code = 97
char = l;code = 108
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = p;code = 112
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = e;code = 101
char = f;code = 102
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = i;code = 105
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = y;code = 121
char = .;code = 46
char = ;code = 32
char = E;code = 69
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = u;code = 117
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 = p;code = 112
char = r;code = 114
char = o;code = 111
char = g;code = 103
char = r;code = 114
char = a;code = 97
char = m;code = 109
char = m;code = 109
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = a;code = 97
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = o;code = 111
char = x;code = 120
char = y;code = 121
char = n;code = 110
char = u;code = 117
char = c;code = 99
char = l;code = 108
char = e;code = 101
char = o;code = 111
char = t;code = 116
char = i;code = 105
char = d;code = 100
char = y;code = 121
char = l;code = 108
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
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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 = 45
char = m;code = 109
char = e;code = 101
char = d;code = 100
char = i;code = 105
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = d;code = 100
char = U;code = 85
char = T;code = 84
char = P;code = 80
char = -;code = 45
char = b;code = 98
char = i;code = 105
char = o;code = 111
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = n;code = 110
char = i;code = 105
char = c;code = 99
char = k;code = 107
char = ;code = 32
char = e;code = 101
char = n;code = 110
char = d;code = 100
char = -;code = 45
char = l;code = 108
char = a;code = 97
char = b;code = 98
char = e;code = 101
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = s;code = 115
char = a;code = 97
char = y;code = 121
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char = i;code = 105
char = n;code = 110
char = d;code = 100
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = e;code = 101
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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 = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = s;code = 115
char = y;code = 121
char = n;code = 110
char = e;code = 101
char = r;code = 114
char = g;code = 103
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = c;code = 99
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char = c;code = 99
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char = t;code = 116
char = o;code = 111
char = t;code = 116
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = c;code = 99
char = t;code = 116
char = y;code = 121
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char = f;code = 102
char = e;code = 101
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char = w;code = 119
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char = t;code = 116
char = h;code = 104
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char = C;code = 67
char = D;code = 68
char = D;code = 68
char = P;code = 80
char = ;code = 32
char = a;code = 97
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char = a;code = 97
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char = o;code = 111
char = r;code = 114
char = i;code = 105
char = n;code = 110
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char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = C;code = 67
char = P;code = 80
char = T;code = 84
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = U;code = 85
char = 2;code = 50
char = 5;code = 53
char = 1;code = 49
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = D;code = 68
char = A;code = 65
char = O;code = 79
char = Y;code = 89
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char = c;code = 99
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = s;code = 115
char = ,;code = 44
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char = s;code = 115
char = p;code = 112
char = e;code = 101
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char = v;code = 118
char = e;code = 101
char = l;code = 108
char = y;code = 121
char = ,;code = 44
char = ;code = 32
char = i;code = 105
char = s;code = 115
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char = t;code = 116
char = o;code = 111
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char = p;code = 112
char = r;code = 114
char = o;code = 111
char = m;code = 109
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char = t;code = 116
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = p;code = 112
char = o;code = 111
char = p;code = 112
char = t;code = 116
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = e;code = 101
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char = r;code = 114
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char = s;code = 115
char = u;code = 117
char = l;code = 108
char = t;code = 116
char = s;code = 115
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char = e;code = 101
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char = c;code = 99
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char = r;code = 114
char = e;code = 101
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char = t;code = 116
char = h;code = 104
char = e;code = 101
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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
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char = c;code = 99
char = e;code = 101
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char = o;code = 111
char = f;code = 102
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char = u;code = 117
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char = t;code = 116
char = a;code = 97
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char = d;code = 100
char = i;code = 105
char = n;code = 110
char = g;code = 103
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char = r;code = 114
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char = g;code = 103
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = G;code = 71
char = 2;code = 50
char = /;code = 47
char = M;code = 77
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = t;code = 116
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char = o;code = 111
char = n;code = 110
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char = i;code = 105
char = n;code = 110
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char = b;code = 98
char = r;code = 114
char = a;code = 97
char = i;code = 105
char = n;code = 110
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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 = 46
char = ;code = 32
char = S;code = 83
char = u;code = 117
char = c;code = 99
char = h;code = 104
char = ;code = 32
char = a;code = 97
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char = u;code = 117
char = n;code = 110
char = d;code = 100
char = e;code = 101
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char = t;code = 116
char = a;code = 97
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char = d;code = 100
char = i;code = 105
char = n;code = 110
char = g;code = 103
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char = m;code = 109
char = a;code = 97
char = y;code = 121
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char = l;code = 108
char = e;code = 101
char = a;code = 97
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
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result sql = Caffeine and staurosporine have been shown to attenuate G2 delay produced by DNA-damaging agents and to augment the cytotoxicity of these agents in a number of cell lines in vitro. Studies in rodent brain tumor cell lines suggest that modulation of the G2/M transition may not contribute to the enhanced cytotoxicity produced by caffeine in brain tumor cells. To evaluate the impact of agents that decrease G2 delay on the cytotoxicity of chemotherapy in human brain tumor cells, we examined the ability of caffeine and staurosporine to modulate the G2 delay and cytotoxicity produced by cisplatin (CDDP) and camptothecin (CPT) in U251 glioma and DAOY medulloblastoma cells. Synchronized U251 were incubated with 20 microM CDDP in the presence or absence of 2 mM caffeine DAOY : cells were incubated with 100 nM CPT in the presence or absence of 2 nM staurosporine. Caffeine and staurosporine attenuated G2 delay produced by CDDP and CPT, respectively. Clonogenic assays indicated that continuous exposure to 2 mM caffeine substantially lowered the ID50 and ID90 of CDDP in U251 cells without significantly altering plating efficiency. Twenty-four-hour exposure to 2 nM staurosporine lowered the ID50 and ID90 of CPT in DAOY cells without significantly altering plating efficiency. Evaluation of programmed cell death using terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end-labeling assay indicated that one mechanism for synergistic cytotoxicty of caffeine with CDDP and staurosporine with CPT in U251 and DAOY cells, respectively, is to promote apoptosis. These results underscore the importance of understanding regulation of G2/M transition in brain tumor cells. Such an understanding may lead to novel therapies that target G2 check points to augment the efficacy of currently available treatments for brain tumors.

Publication: Exp. Cell Res. 1998 Aug 25 ;243(1)::29-38.
Publication Date: 1998 Aug 25
Study Author(s): Janss, A J;Levow, C;Bernhard, E J;Muschel, R J;McKenna, W G;Sutton, L;Phillips, P C;
Institution: Division of Neuro-Oncology, Department of Neurosurgery, Chilren's Hospital of Philadelphia, 515 Abramson Building, 3400 Civic Center Boulevard, Philadelphia, Pennsylvania, 19104, USA.
Shortcut link to this study:
Caffeine and staurosporine have been shown to attenuate G2 delay produced by DNA-damaging agents and to augment the cytotoxicity of these agents in a number of cell lines in vitro. Studies in rodent brain tumor cell lines suggest that modulation of the G2/M transition may not contribute to the enhanced cytotoxicity produced by caffeine in brain tumor cells. To evaluate the impact of agents that decrease G2 delay on the cytotoxicity of chemotherapy in human brain tumor cells, we examined the ability of caffeine and staurosporine to modulate the G2 delay and cytotoxicity produced by cisplatin (CDDP) and camptothecin (CPT) in U251 glioma and DAOY medulloblastoma cells. Synchronized U251 were incubated with 20 microM CDDP in the presence or absence of 2 mM caffeine DAOY : cells were incubated with 100 nM CPT in the presence or absence of 2 nM staurosporine. Caffeine and staurosporine attenuated G2 delay produced by CDDP and CPT, respectively. Clonogenic assays indicated that continuous exposure to 2 mM caffeine substantially lowered the ID50 and ID90 of CDDP in U251 cells without significantly altering plating efficiency. Twenty-four-hour exposure to 2 nM staurosporine lowered the ID50 and ID90 of CPT in DAOY cells without significantly altering plating efficiency. Evaluation of programmed cell death using terminal deoxynucleotidyl transferase-mediated dUTP-biotin nick end-labeling assay indicated that one mechanism for synergistic cytotoxicty of caffeine with CDDP and staurosporine with CPT in U251 and DAOY cells, respectively, is to promote apoptosis. These results underscore the importance of understanding regulation of G2/M transition in brain tumor cells. Such an understanding may lead to novel therapies that target G2 check points to augment the efficacy of currently available treatments for brain tumors.
PMID: 9716446

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