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char = .;code = 46
result sql = [Effect of selenium dioxide on proliferation, apoptosis, and elomerase activity of human lung cancer cell line in vitro].
[Effect of selenium dioxide on proliferation, apoptosis, and elomerase activity of human lung cancer cell line in vitro].
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char = D;code = 68
char = N;code = 78
char = A;code = 65
char = ;code = 32
char = l;code = 108
char = a;code = 97
char = d;code = 100
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = w;code = 119
char = a;code = 97
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 = b;code = 98
char = y;code = 121
char = ;code = 32
char = D;code = 68
char = N;code = 78
char = A;code = 65
char = ;code = 32
char = a;code = 97
char = g;code = 103
char = a;code = 97
char = r;code = 114
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = g;code = 103
char = e;code = 101
char = l;code = 108
char = ;code = 32
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = p;code = 112
char = h;code = 104
char = o;code = 111
char = r;code = 114
char = e;code = 101
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 = ;code = 32
char = m;code = 109
char = o;code = 111
char = r;code = 114
char = p;code = 112
char = h;code = 104
char = o;code = 111
char = l;code = 108
char = o;code = 111
char = g;code = 103
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = a;code = 97
char = n;code = 110
char = g;code = 103
char = e;code = 101
char = s;code = 115
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 = 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 = w;code = 119
char = e;code = 101
char = r;code = 114
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 = u;code = 117
char = n;code = 110
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = g;code = 103
char = h;code = 104
char = t;code = 116
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = n;code = 110
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 = e;code = 101
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 = A;code = 65
char = f;code = 102
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = t;code = 116
char = r;code = 114
char = e;code = 101
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 = 3;code = 51
char = ,;code = 44
char = ;code = 32
char = 1;code = 49
char = 0;code = 48
char = ,;code = 44
char = ;code = 32
char = 3;code = 51
char = 0;code = 48
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 = 109
char = o;code = 111
char = l;code = 108
char = /;code = 47
char = L;code = 76
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = n;code = 110
char = i;code = 105
char = u;code = 117
char = m;code = 109
char = ;code = 32
char = d;code = 100
char = i;code = 105
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 = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = l;code = 108
char = i;code = 105
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = a;code = 97
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 = t;code = 116
char = e;code = 101
char = l;code = 108
char = o;code = 111
char = m;code = 109
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 = o;code = 111
char = f;code = 102
char = ;code = 32
char = G;code = 71
char = L;code = 76
char = C;code = 67
char = -;code = 45
char = 8;code = 56
char = 2;code = 50
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 = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = r;code = 114
char = k;code = 107
char = e;code = 101
char = d;code = 100
char = l;code = 108
char = y;code = 121
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 = e;code = 101
char = d;code = 100
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
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 = 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 = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = G;code = 71
char = L;code = 76
char = C;code = 67
char = -;code = 45
char = 8;code = 56
char = 2;code = 50
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 = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = 2;code = 50
char = 4;code = 52
char = ;code = 32
char = h;code = 104
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 7;code = 55
char = %;code = 37
char = ,;code = 44
char = ;code = 32
char = 1;code = 49
char = 2;code = 50
char = .;code = 46
char = 8;code = 56
char = %;code = 37
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 3;code = 51
char = 1;code = 49
char = .;code = 46
char = 8;code = 56
char = %;code = 37
char = ;;code = 59
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = 7;code = 55
char = 2;code = 50
char = ;code = 32
char = h;code = 104
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = 1;code = 49
char = 5;code = 53
char = .;code = 46
char = 1;code = 49
char = %;code = 37
char = ,;code = 44
char = ;code = 32
char = 5;code = 53
char = 1;code = 49
char = .;code = 46
char = 2;code = 50
char = %;code = 37
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 6;code = 54
char = 1;code = 49
char = .;code = 46
char = 1;code = 49
char = %;code = 37
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 = T;code = 84
char = e;code = 101
char = l;code = 108
char = o;code = 111
char = m;code = 109
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 = o;code = 111
char = f;code = 102
char = ;code = 32
char = G;code = 71
char = L;code = 76
char = C;code = 67
char = -;code = 45
char = 8;code = 56
char = 2;code = 50
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 = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = 2;code = 50
char = 4;code = 52
char = ;code = 32
char = h;code = 104
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = 1;code = 49
char = .;code = 46
char = 1;code = 49
char = 7;code = 55
char = 3;code = 51
char = +;code = 43
char = /;code = 47
char = -;code = 45
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 2;code = 50
char = 9;code = 57
char = ,;code = 44
char = 1;code = 49
char = .;code = 46
char = 1;code = 49
char = 2;code = 50
char = 7;code = 55
char = +;code = 43
char = /;code = 47
char = -;code = 45
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 6;code = 54
char = 7;code = 55
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 1;code = 49
char = .;code = 46
char = 0;code = 48
char = 5;code = 53
char = 0;code = 48
char = +;code = 43
char = /;code = 47
char = -;code = 45
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 9;code = 57
char = 8;code = 56
char = (;code = 40
char = P;code = 80
char = <;code = 60
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 5;code = 53
char = );code = 41
char = ;;code = 59
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = ;code = 32
char = 4;code = 52
char = 8;code = 56
char = ;code = 32
char = h;code = 104
char = o;code = 111
char = u;code = 117
char = r;code = 114
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = 1;code = 49
char = .;code = 46
char = 1;code = 49
char = 5;code = 53
char = 0;code = 48
char = +;code = 43
char = /;code = 47
char = -;code = 45
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 2;code = 50
char = 6;code = 54
char = ,;code = 44
char = ;code = 32
char = 1;code = 49
char = .;code = 46
char = 0;code = 48
char = 4;code = 52
char = 7;code = 55
char = +;code = 43
char = /;code = 47
char = -;code = 45
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 6;code = 54
char = 0;code = 48
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 9;code = 57
char = 5;code = 53
char = 0;code = 48
char = +;code = 43
char = /;code = 47
char = -;code = 45
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 3;code = 51
char = 6;code = 54
char = (;code = 40
char = P;code = 80
char = <;code = 60
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 5;code = 53
char = );code = 41
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 = 32
char = (;code = 40
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 = ;code = 32
char = g;code = 103
char = r;code = 114
char = o;code = 111
char = u;code = 117
char = p;code = 112
char = :;code = 58
char = ;code = 32
char = 1;code = 49
char = .;code = 46
char = 2;code = 50
char = 2;code = 50
char = 7;code = 55
char = +;code = 43
char = /;code = 47
char = -;code = 45
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 3;code = 51
char = 2;code = 50
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = 1;code = 49
char = .;code = 46
char = 1;code = 49
char = 6;code = 54
char = 7;code = 55
char = +;code = 43
char = /;code = 47
char = -;code = 45
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 2;code = 50
char = 3;code = 51
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 = 41
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = n;code = 110
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 = p;code = 112
char = e;code = 101
char = a;code = 97
char = k;code = 107
char = ;code = 32
char = a;code = 97
char = p;code = 112
char = p;code = 112
char = e;code = 101
char = a;code = 97
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = f;code = 102
char = o;code = 111
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = p;code = 112
char = l;code = 108
char = o;code = 111
char = i;code = 105
char = d;code = 100
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = a;code = 97
char = k;code = 107
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = F;code = 70
char = C;code = 67
char = M;code = 77
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = g;code = 103
char = a;code = 97
char = r;code = 114
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = g;code = 103
char = e;code = 101
char = l;code = 108
char = ;code = 32
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = p;code = 112
char = h;code = 104
char = o;code = 111
char = r;code = 114
char = e;code = 101
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 = o;code = 111
char = v;code = 118
char = e;code = 101
char = r;code = 114
char = t;code = 116
char = ;code = 32
char = l;code = 108
char = a;code = 97
char = d;code = 100
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = -;code = 45
char = s;code = 115
char = h;code = 104
char = a;code = 97
char = p;code = 112
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = a;code = 97
char = n;code = 110
char = d;code = 100
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 = 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 = G;code = 71
char = L;code = 76
char = C;code = 67
char = -;code = 45
char = 8;code = 56
char = 2;code = 50
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 = r;code = 114
char = e;code = 101
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = l;code = 108
char = e;code = 101
char = n;code = 110
char = i;code = 105
char = u;code = 117
char = m;code = 109
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = o;code = 111
char = x;code = 120
char = i;code = 105
char = d;code = 100
char = e;code = 101
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 = m;code = 109
char = o;code = 111
char = r;code = 114
char = p;code = 112
char = h;code = 104
char = o;code = 111
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char = <;code = 60
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char = n;code = 110
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char = f;code = 102
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char = c;code = 99
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char = y;code = 121
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 = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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 = o;code = 111
char = f;code = 102
char = ;code = 32
char = l;code = 108
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char = g;code = 103
char = ;code = 32
char = c;code = 99
char = a;code = 97
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char = c;code = 99
char = e;code = 101
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char = ;code = 32
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char = L;code = 76
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char = -;code = 45
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char = l;code = 108
char = s;code = 115
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = o;code = 111
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char = g;code = 103
char = h;code = 104
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = i;code = 105
char = n;code = 110
char = g;code = 103
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 = a;code = 97
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char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
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char = i;code = 105
char = b;code = 98
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
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char = h;code = 104
char = e;code = 101
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char = t;code = 116
char = e;code = 101
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char = n;code = 110
char = i;code = 105
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char = d;code = 100
char = e;code = 101
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char = a;code = 97
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char = ;code = 32
char = s;code = 115
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char = r;code = 114
char = o;code = 111
char = n;code = 110
char = g;code = 103
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 = i;code = 105
char = n;code = 110
char = h;code = 104
char = i;code = 105
char = b;code = 98
char = i;code = 105
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char = o;code = 111
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char = i;code = 105
char = n;code = 110
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char = o;code = 111
char = s;code = 115
char = e;code = 101
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char = m;code = 109
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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 = 32
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result sql = BACKGROUND & OBJECTIVE : It was reported that selenium could induce apoptosis of cancer cells; moreover, apoptosis of cancer cells and telomerase activity were closely related to the development of cancer. This study was designed to investigate the effect of selenium dioxide on human pulmonary adenocarcinoma GLC-82 cell to reveal its probable mechanism and the relationship between apoptosis and telomerase activity.

METHODS : Methyl thiazolyl tetrazolium(MTT) method was used to determine the growth inhibition rates of lung cancer GLC-82 cells by various concentrations of selenium dioxide at different time. TRAP-PCR-ELISA assay was used to examine the changes of GLC-82 cells treated with selenium dioxide. The cell apoptotic rate was measured by flow cytometry (FCM). DNA ladder was showed by DNA agarose gel electrophoresis. The morphological changes of the cancer cells were examined under light and electron microscope.

RESULTS : After being treated with 3, 10, 30 micromol/L selenium dioxide, the proliferation and telomerase activity of GLC-82 cells were markedly inhibited. The growth inhibition rates in GLC-82 cells for 24 hours were 0.7%, 12.8%, and 31.8%; for 72 hours were 15.1%, 51.2%, and 61.1%, respectively. Telomerase activity of GLC-82 cells for 24 hours were 1.173+/-0.029,1.127+/-0.067, and 1.050+/-0.098(P< 0.05); for 48 hours were 1.150+/-0.026, 1.047+/-0.060, and 0.950+/-0.036(P< 0.05), respectively (control group: 1.227+/-0.032 and 1.167+/-0.023, respectively). An apoptosis peak appeared before diploid peak in FCM. Agarose gel electrophoresis showed overt ladder-shape band of cell apoptosis. GLC-82 cells treated by selenium dioxide showed morphological characteristics of apoptotic cells.

CONCLUSION : Selenium dioxide could significantly inhibit the growth of lung cancer GLC-82 cells through inducing apoptosis and inhibiting the telomerase activity. Selenium dioxide has strong growth inhibitory effect in a dose-and time-dependent manner.

Publication: Ai Zheng 2003 Sep ;22(9)::927-31.
Publication Date: 2003 Sep
Study Author(s): Chen, Wei-Xiang;Cao, Xiao-Zhe;Zhu, Ren-Zhi;
Institution: Department of Pathology, Lanzhou Medical College, Lanzhou, Gansu, 730000, PR China.
Shortcut link to this study:
BACKGROUND & OBJECTIVE : It was reported that selenium could induce apoptosis of cancer cells; moreover, apoptosis of cancer cells and telomerase activity were closely related to the development of cancer. This study was designed to investigate the effect of selenium dioxide on human pulmonary adenocarcinoma GLC-82 cell to reveal its probable mechanism and the relationship between apoptosis and telomerase activity.

METHODS : Methyl thiazolyl tetrazolium(MTT) method was used to determine the growth inhibition rates of lung cancer GLC-82 cells by various concentrations of selenium dioxide at different time. TRAP-PCR-ELISA assay was used to examine the changes of GLC-82 cells treated with selenium dioxide. The cell apoptotic rate was measured by flow cytometry (FCM). DNA ladder was showed by DNA agarose gel electrophoresis. The morphological changes of the cancer cells were examined under light and electron microscope.

RESULTS : After being treated with 3, 10, 30 micromol/L selenium dioxide, the proliferation and telomerase activity of GLC-82 cells were markedly inhibited. The growth inhibition rates in GLC-82 cells for 24 hours were 0.7%, 12.8%, and 31.8%; for 72 hours were 15.1%, 51.2%, and 61.1%, respectively. Telomerase activity of GLC-82 cells for 24 hours were 1.173+/-0.029,1.127+/-0.067, and 1.050+/-0.098(P< 0.05); for 48 hours were 1.150+/-0.026, 1.047+/-0.060, and 0.950+/-0.036(P< 0.05), respectively (control group: 1.227+/-0.032 and 1.167+/-0.023, respectively). An apoptosis peak appeared before diploid peak in FCM. Agarose gel electrophoresis showed overt ladder-shape band of cell apoptosis. GLC-82 cells treated by selenium dioxide showed morphological characteristics of apoptotic cells.

CONCLUSION : Selenium dioxide could significantly inhibit the growth of lung cancer GLC-82 cells through inducing apoptosis and inhibiting the telomerase activity. Selenium dioxide has strong growth inhibitory effect in a dose-and time-dependent manner.
PMID: 12969523

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