char = Q;code = 81
char = u;code = 117
char = e;code = 101
char = r;code = 114
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = n;code = 110
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 = s;code = 115
char = ;code = 32
char = n;code = 110
char = e;code = 101
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
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 = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = S;code = 83
char = C;code = 67
char = C;code = 67
char = -;code = 45
char = 9;code = 57
char = ;code = 32
char = o;code = 111
char = r;code = 114
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 = c;code = 99
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = s;code = 115
char = .;code = 46
result sql = Quercetin induces necrosis and apoptosis in SCC-9 oral cancer cells.
Quercetin induces necrosis and apoptosis in SCC-9 oral cancer cells.
char = E;code = 69
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 = h;code = 104
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = c;code = 99
char = u;code = 117
char = m;code = 109
char = u;code = 117
char = l;code = 108
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 = d;code = 100
char = i;code = 105
char = e;code = 101
char = t;code = 116
char = a;code = 97
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = l;code = 108
char = y;code = 121
char = p;code = 112
char = h;code = 104
char = e;code = 101
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char = o;code = 111
char = l;code = 108
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = p;code = 112
char = a;code = 97
char = r;code = 114
char = t;code = 116
char = i;code = 105
char = c;code = 99
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = ,;code = 44
char = ;code = 32
char = f;code = 102
char = l;code = 108
char = a;code = 97
char = v;code = 118
char = o;code = 111
char = n;code = 110
char = o;code = 111
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char = d;code = 100
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = h;code = 104
char = a;code = 97
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char = e;code = 101
char = ;code = 32
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char = r;code = 114
char = o;code = 111
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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 = ;code = 32
char = e;code = 101
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = c;code = 99
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char = s;code = 115
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 = o;code = 111
char = r;code = 114
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
char = ;code = 32
char = I;code = 73
char = n;code = 110
char = ;code = 32
char = t;code = 116
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 = 44
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = ;code = 32
char = h;code = 104
char = a;code = 97
char = v;code = 118
char = e;code = 101
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 = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = e;code = 101
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 = o;code = 111
char = f;code = 102
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = r;code = 114
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = ,;code = 44
char = ;code = 32
char = a;code = 97
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 = d;code = 100
char = i;code = 105
char = e;code = 101
char = t;code = 116
char = a;code = 97
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = f;code = 102
char = l;code = 108
char = a;code = 97
char = v;code = 118
char = o;code = 111
char = n;code = 110
char = o;code = 111
char = i;code = 105
char = d;code = 100
char = ,;code = 44
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = c;code = 99
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = g;code = 103
char = r;code = 114
char = o;code = 111
char = w;code = 119
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = n;code = 110
char = e;code = 101
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = /;code = 47
char = a;code = 97
char = p;code = 112
char = o;code = 111
char = p;code = 112
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char = o;code = 111
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char = i;code = 105
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
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char = l;code = 108
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = y;code = 121
char = c;code = 99
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = r;code = 114
char = e;code = 101
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
char = n;code = 110
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = h;code = 104
char = u;code = 117
char = m;code = 109
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = r;code = 114
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = s;code = 115
char = q;code = 113
char = u;code = 117
char = a;code = 97
char = m;code = 109
char = o;code = 111
char = u;code = 117
char = s;code = 115
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = c;code = 99
char = i;code = 105
char = n;code = 110
char = o;code = 111
char = m;code = 109
char = a;code = 97
char = ;code = 32
char = S;code = 83
char = C;code = 67
char = C;code = 67
char = -;code = 45
char = 9;code = 57
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 = Q;code = 81
char = u;code = 117
char = e;code = 101
char = r;code = 114
char = c;code = 99
char = e;code = 101
char = t;code = 116
char = i;code = 105
char = n;code = 110
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 = d;code = 100
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = -;code = 45
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
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char = m;code = 109
char = e;code = 101
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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 = 44
char = ;code = 32
char = i;code = 105
char = r;code = 114
char = r;code = 114
char = e;code = 101
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char = e;code = 101
char = r;code = 114
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char = i;code = 105
char = b;code = 98
char = l;code = 108
char = e;code = 101
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 = c;code = 99
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = g;code = 103
char = r;code = 114
char = o;code = 111
char = w;code = 119
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = e;code = 101
char = l;code = 108
char = l;code = 108
char = u;code = 117
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = ;code = 32
char = D;code = 68
char = N;code = 78
char = A;code = 65
char = ;code = 32
char = s;code = 115
char = y;code = 121
char = n;code = 110
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = i;code = 105
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = L;code = 76
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = t;code = 116
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = s;code = 115
char = c;code = 99
char = o;code = 111
char = p;code = 112
char = y;code = 121
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = l;code = 108
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = e;code = 101
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 = a;code = 97
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = m;code = 109
char = e;code = 101
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char = t;code = 116
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
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char = e;code = 101
char = d;code = 100
char = ;code = 32
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char = o;code = 111
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char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = s;code = 115
char = ;code = 32
char = i;code = 105
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char = l;code = 108
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char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = m;code = 109
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char = r;code = 114
char = a;code = 97
char = n;code = 110
char = e;code = 101
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char = n;code = 110
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char = e;code = 101
char = g;code = 103
char = r;code = 114
char = i;code = 105
char = t;code = 116
char = y;code = 121
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char = e;code = 101
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char = c;code = 99
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char = l;code = 108
char = s;code = 115
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char = a;code = 97
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char = e;code = 101
char = a;code = 97
char = t;code = 116
char = m;code = 109
char = e;code = 101
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char = t;code = 116
char = .;code = 46
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char = P;code = 80
char = r;code = 114
char = o;code = 111
char = p;code = 112
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char = i;code = 105
char = u;code = 117
char = m;code = 109
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char = i;code = 105
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char = i;code = 105
char = d;code = 100
char = e;code = 101
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char = i;code = 105
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char = V;code = 86
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char = a;code = 97
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char = 2;code = 50
char = 4;code = 52
char = ;code = 32
char = h;code = 104
char = ;code = 32
char = a;code = 97
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char = d;code = 100
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char = 8;code = 56
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char = h;code = 104
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char = e;code = 101
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char = a;code = 97
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char = a;code = 97
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char = a;code = 97
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char = o;code = 111
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char = c;code = 99
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char = a;code = 97
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char = o;code = 111
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char = d;code = 100
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char = t;code = 116
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char = n;code = 110
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char = a;code = 97
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char = l;code = 108
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char = n;code = 110
char = ;code = 32
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char = o;code = 111
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char = i;code = 105
char = o;code = 111
char = n;code = 110
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char = ;code = 32
char = o;code = 111
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char = r;code = 114
char = ;code = 32
char = d;code = 100
char = a;code = 97
char = t;code = 116
char = a;code = 97
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = p;code = 112
char = p;code = 112
char = o;code = 111
char = r;code = 114
char = t;code = 116
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = v;code = 118
char = i;code = 105
char = e;code = 101
char = w;code = 119
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
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char = u;code = 117
char = e;code = 101
char = r;code = 114
char = c;code = 99
char = e;code = 101
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char = i;code = 105
char = n;code = 110
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char = i;code = 105
char = n;code = 110
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = y;code = 121
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char = n;code = 110
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char = s;code = 115
char = s;code = 115
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char = p;code = 112
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char = e;code = 101
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char = t;code = 116
char = i;code = 105
char = n;code = 110
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char = i;code = 105
char = n;code = 110
char = ;code = 32
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char = c;code = 99
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char = i;code = 105
char = s;code = 115
char = ;code = 32
char = o;code = 111
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char = ;code = 32
char = t;code = 116
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char = l;code = 108
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char = t;code = 116
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char = i;code = 105
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char = ;code = 32
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char = l;code = 108
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char = p;code = 112
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char = e;code = 101
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char = ;code = 32
char = p;code = 112
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char = u;code = 117
char = m;code = 109
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char = l;code = 108
char = y;code = 121
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char = d;code = 100
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char = n;code = 110
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char = i;code = 105
char = b;code = 98
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char = o;code = 111
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char = o;code = 111
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char = ;code = 32
char = T;code = 84
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char = p;code = 112
char = r;code = 114
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char = t;code = 116
char = e;code = 101
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result sql = Evidence has accumulated that dietary polyphenols, in particular, flavonoids, have protective effects against oral cancer. In this study, we have examined the effects of quercetin, a major dietary flavonoid, on cell growth and necrosis/apoptosis and cell cycle regulation in human oral squamous carcinoma SCC-9 cells. Quercetin induced dose- and time-dependent, irreversible inhibition of cell growth and cellular DNA synthesis. Light microscopy and lactate dehydrogenase measurements showed modifications in the morphology and membrane integrity of these cells after quercetin treatment. Propidium iodide/annexin V staining showed that quercetin induced necrosis at 24 h and 48 h, whereas at 72 h cells underwent apoptosis, correlating with caspase-3 activation. Flow cytometry studies of the cell cycle distribution showed that quercetin induced mainly S-phase arrest. Thymidylate synthase (TS), a key S-phase enzyme, was inhibited in a time- and dose-dependent fashion by quercetin at the protein level. A lack of effect on TS mRNA suggested that TS down-regulation occurred at the translational level. In conclusion, our data support a view that quercetin initially induces a stress response, resulting in necrosis of these oral epithelial cells. Prolonged exposure of the surviving cells to quercetin causes apoptosis, presumably mediated by inhibition of TS protein.

Publication: Nutr Cancer 2005 ;53(2)::220-31.
Publication Date: 2005
Study Author(s): Haghiac, Maricela;Walle, Thomas;
Institution: Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC 29425, USA.
Shortcut link to this study:
Evidence has accumulated that dietary polyphenols, in particular, flavonoids, have protective effects against oral cancer. In this study, we have examined the effects of quercetin, a major dietary flavonoid, on cell growth and necrosis/apoptosis and cell cycle regulation in human oral squamous carcinoma SCC-9 cells. Quercetin induced dose- and time-dependent, irreversible inhibition of cell growth and cellular DNA synthesis. Light microscopy and lactate dehydrogenase measurements showed modifications in the morphology and membrane integrity of these cells after quercetin treatment. Propidium iodide/annexin V staining showed that quercetin induced necrosis at 24 h and 48 h, whereas at 72 h cells underwent apoptosis, correlating with caspase-3 activation. Flow cytometry studies of the cell cycle distribution showed that quercetin induced mainly S-phase arrest. Thymidylate synthase (TS), a key S-phase enzyme, was inhibited in a time- and dose-dependent fashion by quercetin at the protein level. A lack of effect on TS mRNA suggested that TS down-regulation occurred at the translational level. In conclusion, our data support a view that quercetin initially induces a stress response, resulting in necrosis of these oral epithelial cells. Prolonged exposure of the surviving cells to quercetin causes apoptosis, presumably mediated by inhibition of TS protein.
PMID: 16573383

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