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result sql = Calcium-containing organelles display unique reactivity to chemical stimulation in cultured hippocampal neurons.
Calcium-containing organelles display unique reactivity to chemical stimulation in cultured hippocampal neurons.
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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 = a;code = 97
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = p;code = 112
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = a;code = 97
char = r;code = 114
char = g;code = 103
char = i;code = 105
char = n;code = 110
char = -;code = 45
char = s;code = 115
char = e;code = 101
char = n;code = 110
char = s;code = 115
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = c;code = 99
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = C;code = 67
char = C;code = 67
char = O;code = 79
char = s;code = 115
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = p;code = 112
char = o;code = 111
char = n;code = 110
char = d;code = 100
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = m;code = 109
char = u;code = 117
char = l;code = 108
char = i;code = 105
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = e;code = 101
char = v;code = 118
char = o;code = 111
char = k;code = 107
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = y;code = 121
char = t;code = 116
char = o;code = 111
char = s;code = 115
char = o;code = 111
char = l;code = 108
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = [;code = 91
char = C;code = 67
char = a;code = 97
char = 2;code = 50
char = +;code = 43
char = ];code = 93
char = ;code = 32
char = (;code = 40
char = [;code = 91
char = C;code = 67
char = a;code = 97
char = ];code = 93
char = i;code = 105
char = );code = 41
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = u;code = 117
char = n;code = 110
char = i;code = 105
char = q;code = 113
char = u;code = 117
char = e;code = 101
char = ;code = 32
char = m;code = 109
char = a;code = 97
char = n;code = 110
char = n;code = 110
char = e;code = 101
char = r;code = 114
char = ;;code = 59
char = ;code = 32
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = f;code = 102
char = u;code = 117
char = s;code = 115
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 = 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 = c;code = 99
char = a;code = 97
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = l;code = 108
char = o;code = 111
char = n;code = 110
char = g;code = 103
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = [;code = 91
char = C;code = 67
char = a;code = 97
char = ];code = 93
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 = C;code = 67
char = C;code = 67
char = O;code = 79
char = s;code = 115
char = ;code = 32
char = (;code = 40
char = [;code = 91
char = C;code = 67
char = a;code = 97
char = ];code = 93
char = C;code = 67
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = w;code = 119
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = t;code = 116
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = a;code = 97
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 = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = [;code = 91
char = C;code = 67
char = a;code = 97
char = ];code = 93
char = i;code = 105
char = .;code = 46
char = ;code = 32
char = P;code = 80
char = u;code = 117
char = l;code = 108
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = p;code = 112
char = p;code = 112
char = l;code = 108
char = i;code = 105
char = c;code = 99
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 = 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 = a;code = 97
char = l;code = 108
char = s;code = 115
char = o;code = 111
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = ;code = 32
char = f;code = 102
char = a;code = 97
char = s;code = 115
char = t;code = 116
char = e;code = 101
char = r;code = 114
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 = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = [;code = 91
char = C;code = 67
char = a;code = 97
char = ];code = 93
char = C;code = 67
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = n;code = 110
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = [;code = 91
char = C;code = 67
char = a;code = 97
char = ];code = 93
char = i;code = 105
char = .;code = 46
char = ;code = 32
char = G;code = 71
char = l;code = 108
char = u;code = 117
char = t;code = 116
char = a;code = 97
char = m;code = 109
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
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 = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = r;code = 114
char = i;code = 105
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = b;code = 98
char = o;code = 111
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = [;code = 91
char = C;code = 67
char = a;code = 97
char = ];code = 93
char = i;code = 105
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = [;code = 91
char = C;code = 67
char = a;code = 97
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char = C;code = 67
char = ,;code = 44
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = l;code = 108
char = l;code = 108
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 = a;code = 97
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = l;code = 108
char = o;code = 111
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char = g;code = 103
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = f;code = 102
char = a;code = 97
char = l;code = 108
char = l;code = 108
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = l;code = 108
char = y;code = 121
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char = [;code = 91
char = C;code = 67
char = a;code = 97
char = ];code = 93
char = C;code = 67
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = t;code = 116
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 = T;code = 84
char = h;code = 104
char = i;code = 105
char = s;code = 115
char = ;code = 32
char = f;code = 102
char = a;code = 97
char = l;code = 108
char = l;code = 108
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char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = b;code = 98
char = l;code = 108
char = o;code = 111
char = c;code = 99
char = k;code = 107
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = y;code = 121
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = c;code = 99
char = u;code = 117
char = b;code = 98
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
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char = s;code = 115
char = i;code = 105
char = g;code = 103
char = a;code = 97
char = r;code = 114
char = g;code = 103
char = i;code = 105
char = n;code = 110
char = .;code = 46
char = ;code = 32
char = R;code = 82
char = y;code = 121
char = a;code = 97
char = n;code = 110
char = o;code = 111
char = d;code = 100
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = l;code = 108
char = o;code = 111
char = c;code = 99
char = k;code = 107
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 = c;code = 99
char = y;code = 121
char = t;code = 116
char = o;code = 111
char = s;code = 115
char = o;code = 111
char = l;code = 108
char = i;code = 105
char = c;code = 99
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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
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char = o;code = 111
char = f;code = 102
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 = b;code = 98
char = u;code = 117
char = t;code = 116
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = t;code = 116
char = ;code = 32
char = i;code = 105
char = t;code = 116
char = s;code = 115
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 = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = [;code = 91
char = C;code = 67
char = ];code = 93
char = C;code = 67
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = ;code = 32
char = c;code = 99
char = l;code = 108
char = e;code = 101
char = a;code = 97
char = r;code = 114
char = ;code = 32
char = d;code = 100
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = i;code = 105
char = n;code = 110
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 = e;code = 101
char = t;code = 116
char = w;code = 119
char = e;code = 101
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = C;code = 67
char = C;code = 67
char = O;code = 79
char = s;code = 115
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = k;code = 107
char = n;code = 110
char = o;code = 111
char = w;code = 119
char = n;code = 110
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = l;code = 108
char = c;code = 99
char = i;code = 105
char = u;code = 117
char = m;code = 109
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = e;code = 101
char = n;code = 110
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char = i;code = 105
char = n;code = 110
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char = d;code = 100
char = i;code = 105
char = g;code = 103
char = i;code = 105
char = t;code = 116
char = o;code = 111
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char = i;code = 105
char = n;code = 110
char = -;code = 45
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = m;code = 109
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char = a;code = 97
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char = i;code = 105
char = l;code = 108
char = i;code = 105
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char = s;code = 115
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char = i;code = 105
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char = t;code = 116
char = h;code = 104
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = ,;code = 44
char = ;code = 32
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char = m;code = 109
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = F;code = 70
char = l;code = 108
char = u;code = 117
char = o;code = 111
char = -;code = 45
char = 3;code = 51
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = p;code = 112
char = o;code = 111
char = r;code = 114
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char = e;code = 101
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char = c;code = 99
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char = a;code = 97
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char = g;code = 103
char = e;code = 101
char = s;code = 115
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char = i;code = 105
char = n;code = 110
char = ;code = 32
char = s;code = 115
char = t;code = 116
char = o;code = 111
char = r;code = 114
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char = c;code = 99
char = a;code = 97
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char = c;code = 99
char = i;code = 105
char = u;code = 117
char = m;code = 109
char = ,;code = 44
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char = i;code = 105
char = .;code = 46
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char = .;code = 46
char = ,;code = 44
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char = f;code = 102
char = e;code = 101
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char = a;code = 97
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char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
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char = r;code = 114
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char = d;code = 100
char = u;code = 117
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
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char = i;code = 105
char = n;code = 110
char = ;code = 32
char = F;code = 70
char = l;code = 108
char = u;code = 117
char = o;code = 111
char = -;code = 45
char = 3;code = 51
char = ;code = 32
char = f;code = 102
char = l;code = 108
char = u;code = 117
char = o;code = 111
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char = e;code = 101
char = s;code = 115
char = c;code = 99
char = e;code = 101
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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 = p;code = 112
char = e;code = 101
char = r;code = 114
char = m;code = 109
char = e;code = 101
char = a;code = 97
char = b;code = 98
char = i;code = 105
char = l;code = 108
char = i;code = 105
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char = e;code = 101
char = d;code = 100
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char = c;code = 99
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char = l;code = 108
char = l;code = 108
char = s;code = 115
char = ,;code = 44
char = ;code = 32
char = w;code = 119
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = t;code = 116
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char = s;code = 115
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char = l;code = 108
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = a;code = 97
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
char = n;code = 110
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char = i;code = 105
char = n;code = 110
char = c;code = 99
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = s;code = 115
char = e;code = 101
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = [;code = 91
char = C;code = 67
char = a;code = 97
char = ];code = 93
char = C;code = 67
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = ;code = 32
char = p;code = 112
char = o;code = 111
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = b;code = 98
char = l;code = 108
char = e;code = 101
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char = r;code = 114
char = o;code = 111
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = C;code = 67
char = C;code = 67
char = O;code = 79
char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
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result sql = Cultured rat hippocampal neurons grown on glass coverslips for 1-3 weeks were loaded with the calcium-sensitive fluorescent dye Fluo-3 and viewed with a confocal laser scanning microscope. Large pyramidal-shaped neurons were found to contain dye-accumulating organelles in their somata, primarily around nuclei and near the base of their primary dendrites. These organelles varied in size and increased in density over weeks in culture, and were not colocalized with the endoplasmic reticulum or with mitochondria. The Fluo-3 fluorescence in these calcium-containing organelles (CCOs) was transiently quenched by exposure to Mn2+, indicating that the dye is a genuine [Ca2+] reporter and is not just a site of accumulating Fluo-3 dye. Recovery of fluorescence in the CCOs after washout of Mn2+ involved activation of a thapsigargin-sensitive process. CCOs responded to stimuli that evoke a rise of cytosolic [Ca2+] ([Ca]i) in a unique manner; perfusion of caffeine caused a prolonged rise of [Ca] in the CCOs ([Ca]C), whereas it caused only a transient rise of [Ca]i. Pulse application of caffeine also caused a faster effect on [Ca]C than on [Ca]i. Glutamate caused a transient rise of both [Ca]i and [Ca]C, followed by a prolonged fall of only [Ca]C to below rest level. This fall was blocked by preincubation with thapsigargin. Ryanodine blocked the cytosolic effects of caffeine but not its effect on [C]C. A clear distinction between CCOs and the known calcium stores was seen in digitonin-permeabilized cells; in these, remaining Fluo-3 reported changes in store calcium, i.e., caffeine caused a reduction in Fluo-3 fluorescence in permeabilized cells, whereas it still caused an increase in [Ca]C. A possible role of CCOs in regulation of release of calcium from ryanodine-sensitive stores was indicated by the observation that CCO-containing cells exhibited a larger and faster response to caffeine than cells that did not have them. We propose that CCOs constitute a unique functional compartment involved in release of calcium from calcium-sensitive stores.

Publication: J. Neurosci. 1997 Mar 1 ;17(5)::1670-82.
Publication Date: 1997 Mar 1
Study Author(s): Korkotian, E;Segal, M;
Institution: Department of Neurobiology, The Weizmann Institute, Rehovot 76100, Israel.
Shortcut link to this study:
Cultured rat hippocampal neurons grown on glass coverslips for 1-3 weeks were loaded with the calcium-sensitive fluorescent dye Fluo-3 and viewed with a confocal laser scanning microscope. Large pyramidal-shaped neurons were found to contain dye-accumulating organelles in their somata, primarily around nuclei and near the base of their primary dendrites. These organelles varied in size and increased in density over weeks in culture, and were not colocalized with the endoplasmic reticulum or with mitochondria. The Fluo-3 fluorescence in these calcium-containing organelles (CCOs) was transiently quenched by exposure to Mn2+, indicating that the dye is a genuine [Ca2+] reporter and is not just a site of accumulating Fluo-3 dye. Recovery of fluorescence in the CCOs after washout of Mn2+ involved activation of a thapsigargin-sensitive process. CCOs responded to stimuli that evoke a rise of cytosolic [Ca2+] ([Ca]i) in a unique manner; perfusion of caffeine caused a prolonged rise of [Ca] in the CCOs ([Ca]C), whereas it caused only a transient rise of [Ca]i. Pulse application of caffeine also caused a faster effect on [Ca]C than on [Ca]i. Glutamate caused a transient rise of both [Ca]i and [Ca]C, followed by a prolonged fall of only [Ca]C to below rest level. This fall was blocked by preincubation with thapsigargin. Ryanodine blocked the cytosolic effects of caffeine but not its effect on [C]C. A clear distinction between CCOs and the known calcium stores was seen in digitonin-permeabilized cells; in these, remaining Fluo-3 reported changes in store calcium, i.e., caffeine caused a reduction in Fluo-3 fluorescence in permeabilized cells, whereas it still caused an increase in [Ca]C. A possible role of CCOs in regulation of release of calcium from ryanodine-sensitive stores was indicated by the observation that CCO-containing cells exhibited a larger and faster response to caffeine than cells that did not have them. We propose that CCOs constitute a unique functional compartment involved in release of calcium from calcium-sensitive stores.
PMID: 9030626

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