|
|
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result sql = Dopaminergic mechanism for caffeine-produced cocaine seeking in rats.
Dopaminergic mechanism for caffeine-produced cocaine seeking in rats.char = S;code = 83
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result sql = Systemic administration of caffeine reinstates extinguished cocaine self-administration behavior in rats, but the mechanism mediating this behavioral effect has not been established. The present study examined the role of adenosinergic A2 and dopaminergic mechanisms in caffeine-produced cocaine seeking. Following extinction of cocaine self-administration, experimenter-administered injections of caffeine (1.25-20 mg/kg) and theophylline (1-10 mg/kg) dose-dependently reinstated extinguished cocaine-seeking behavior. Administration of the adenosinergic A2 antagonist, 3,7-dimethyl-1-propargylxanthine (DMPX; 0.546-2.18 microg/kg), failed to produce cocaine seeking. Pretreatment with doses of the adenosine A1/A2 agonist 5'-N-ethylcarboxamidoadenosine (NECA; 0.003-0.03 mg/kg) that were below those that produced marked sedation failed to block reinstatement. These data suggest that methylxanthine-produced cocaine seeking is not due to adenosine A2 receptor antagonism. In contrast, pretreatment with the dopaminergic D1-like antagonist SCH 23390 (0.005-0.02 mg/kg) or the D2-like antagonist eticlopride (0.03-0.3 mg/kg) produced a dose-dependent attenuation of caffeine-produced reinstatement at doses that did not decrease cocaine self-administration. These findings suggest that dopaminergic mechanisms underlie the ability of caffeine to reinstate extinguished cocaine-taking behavior.
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char = f;code = 102
char = e;code = 101
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result sql = Dopaminergic mechanism for caffeine-produced cocaine seeking in rats.
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char = s;code = 115
char = ;code = 32
char = i;code = 105
char = n;code = 110
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 = 45
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = c;code = 99
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = e;code = 101
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = .;code = 46
char = ;code = 32
char = F;code = 70
char = o;code = 111
char = l;code = 108
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = e;code = 101
char = x;code = 120
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 = o;code = 111
char = f;code = 102
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = c;code = 99
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = l;code = 108
char = f;code = 102
char = -;code = 45
char = a;code = 97
char = d;code = 100
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = i;code = 105
char = s;code = 115
char = t;code = 116
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 = 44
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = p;code = 112
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = -;code = 45
char = a;code = 97
char = d;code = 100
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = j;code = 106
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = s;code = 115
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 = (;code = 40
char = 1;code = 49
char = .;code = 46
char = 2;code = 50
char = 5;code = 53
char = -;code = 45
char = 2;code = 50
char = 0;code = 48
char = ;code = 32
char = m;code = 109
char = g;code = 103
char = /;code = 47
char = k;code = 107
char = g;code = 103
char = );code = 41
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
char = o;code = 111
char = p;code = 112
char = h;code = 104
char = y;code = 121
char = l;code = 108
char = l;code = 108
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = 1;code = 49
char = -;code = 45
char = 1;code = 49
char = 0;code = 48
char = ;code = 32
char = m;code = 109
char = g;code = 103
char = /;code = 47
char = k;code = 107
char = g;code = 103
char = );code = 41
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = -;code = 45
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 = l;code = 108
char = y;code = 121
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = u;code = 117
char = i;code = 105
char = s;code = 115
char = h;code = 104
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = c;code = 99
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = -;code = 45
char = s;code = 115
char = e;code = 101
char = e;code = 101
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = h;code = 104
char = a;code = 97
char = v;code = 118
char = i;code = 105
char = o;code = 111
char = r;code = 114
char = .;code = 46
char = ;code = 32
char = A;code = 65
char = d;code = 100
char = m;code = 109
char = i;code = 105
char = n;code = 110
char = i;code = 105
char = s;code = 115
char = t;code = 116
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 = 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 = a;code = 97
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = r;code = 114
char = g;code = 103
char = i;code = 105
char = c;code = 99
char = ;code = 32
char = A;code = 65
char = 2;code = 50
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = a;code = 97
char = g;code = 103
char = o;code = 111
char = n;code = 110
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = ,;code = 44
char = ;code = 32
char = 3;code = 51
char = ,;code = 44
char = 7;code = 55
char = -;code = 45
char = d;code = 100
char = i;code = 105
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
char = l;code = 108
char = -;code = 45
char = 1;code = 49
char = -;code = 45
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = p;code = 112
char = a;code = 97
char = r;code = 114
char = g;code = 103
char = y;code = 121
char = l;code = 108
char = x;code = 120
char = a;code = 97
char = n;code = 110
char = t;code = 116
char = h;code = 104
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = D;code = 68
char = M;code = 77
char = P;code = 80
char = X;code = 88
char = ;;code = 59
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 5;code = 53
char = 4;code = 52
char = 6;code = 54
char = -;code = 45
char = 2;code = 50
char = .;code = 46
char = 1;code = 49
char = 8;code = 56
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = g;code = 103
char = /;code = 47
char = k;code = 107
char = g;code = 103
char = );code = 41
char = ,;code = 44
char = ;code = 32
char = f;code = 102
char = a;code = 97
char = i;code = 105
char = l;code = 108
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
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 = ;code = 32
char = c;code = 99
char = o;code = 111
char = c;code = 99
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = e;code = 101
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = .;code = 46
char = ;code = 32
char = P;code = 80
char = r;code = 114
char = e;code = 101
char = t;code = 116
char = r;code = 114
char = e;code = 101
char = a;code = 97
char = t;code = 116
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
char = ;code = 32
char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = s;code = 115
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = a;code = 97
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = A;code = 65
char = 1;code = 49
char = /;code = 47
char = A;code = 65
char = 2;code = 50
char = ;code = 32
char = a;code = 97
char = g;code = 103
char = o;code = 111
char = n;code = 110
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = 5;code = 53
char = ';code = 39
char = -;code = 45
char = N;code = 78
char = -;code = 45
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
char = l;code = 108
char = c;code = 99
char = a;code = 97
char = r;code = 114
char = b;code = 98
char = o;code = 111
char = x;code = 120
char = a;code = 97
char = m;code = 109
char = i;code = 105
char = d;code = 100
char = o;code = 111
char = a;code = 97
char = d;code = 100
char = e;code = 101
char = n;code = 110
char = o;code = 111
char = s;code = 115
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = N;code = 78
char = E;code = 69
char = C;code = 67
char = A;code = 65
char = ;;code = 59
char = ;code = 32
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 0;code = 48
char = 3;code = 51
char = -;code = 45
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 3;code = 51
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char = m;code = 109
char = g;code = 103
char = /;code = 47
char = k;code = 107
char = g;code = 103
char = );code = 41
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
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char = b;code = 98
char = e;code = 101
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = o;code = 111
char = s;code = 115
char = e;code = 101
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char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
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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 = m;code = 109
char = a;code = 97
char = r;code = 114
char = k;code = 107
char = e;code = 101
char = d;code = 100
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char = s;code = 115
char = e;code = 101
char = d;code = 100
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
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char = f;code = 102
char = a;code = 97
char = i;code = 105
char = l;code = 108
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = b;code = 98
char = l;code = 108
char = o;code = 111
char = c;code = 99
char = k;code = 107
char = ;code = 32
char = r;code = 114
char = e;code = 101
char = i;code = 105
char = n;code = 110
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = t;code = 116
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 = d;code = 100
char = a;code = 97
char = t;code = 116
char = a;code = 97
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char = s;code = 115
char = u;code = 117
char = g;code = 103
char = g;code = 103
char = e;code = 101
char = s;code = 115
char = t;code = 116
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char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = y;code = 121
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char = x;code = 120
char = a;code = 97
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char = t;code = 116
char = h;code = 104
char = i;code = 105
char = n;code = 110
char = e;code = 101
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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 = c;code = 99
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char = c;code = 99
char = a;code = 97
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char = n;code = 110
char = e;code = 101
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char = e;code = 101
char = e;code = 101
char = k;code = 107
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char = n;code = 110
char = g;code = 103
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char = i;code = 105
char = s;code = 115
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char = o;code = 111
char = t;code = 116
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char = d;code = 100
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char = e;code = 101
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char = s;code = 115
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char = A;code = 65
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char = c;code = 99
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char = t;code = 116
char = a;code = 97
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char = o;code = 111
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char = i;code = 105
char = s;code = 115
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char = .;code = 46
char = ;code = 32
char = I;code = 73
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char = ;code = 32
char = c;code = 99
char = o;code = 111
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char = t;code = 116
char = r;code = 114
char = a;code = 97
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char = t;code = 116
char = ,;code = 44
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char = a;code = 97
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char = m;code = 109
char = e;code = 101
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char = w;code = 119
char = i;code = 105
char = t;code = 116
char = h;code = 104
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char = t;code = 116
char = h;code = 104
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char = d;code = 100
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char = p;code = 112
char = a;code = 97
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char = i;code = 105
char = n;code = 110
char = e;code = 101
char = r;code = 114
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char = i;code = 105
char = c;code = 99
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char = D;code = 68
char = 1;code = 49
char = -;code = 45
char = l;code = 108
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char = k;code = 107
char = e;code = 101
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char = a;code = 97
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char = t;code = 116
char = a;code = 97
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char = o;code = 111
char = n;code = 110
char = i;code = 105
char = s;code = 115
char = t;code = 116
char = ;code = 32
char = S;code = 83
char = C;code = 67
char = H;code = 72
char = ;code = 32
char = 2;code = 50
char = 3;code = 51
char = 3;code = 51
char = 9;code = 57
char = 0;code = 48
char = ;code = 32
char = (;code = 40
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 0;code = 48
char = 5;code = 53
char = -;code = 45
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 2;code = 50
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char = m;code = 109
char = g;code = 103
char = /;code = 47
char = k;code = 107
char = g;code = 103
char = );code = 41
char = ;code = 32
char = o;code = 111
char = r;code = 114
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char = t;code = 116
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char = e;code = 101
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char = D;code = 68
char = 2;code = 50
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char = l;code = 108
char = i;code = 105
char = k;code = 107
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 = o;code = 111
char = n;code = 110
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char = s;code = 115
char = t;code = 116
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char = i;code = 105
char = c;code = 99
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char = o;code = 111
char = p;code = 112
char = r;code = 114
char = i;code = 105
char = d;code = 100
char = e;code = 101
char = ;code = 32
char = (;code = 40
char = 0;code = 48
char = .;code = 46
char = 0;code = 48
char = 3;code = 51
char = -;code = 45
char = 0;code = 48
char = .;code = 46
char = 3;code = 51
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char = m;code = 109
char = g;code = 103
char = /;code = 47
char = k;code = 107
char = g;code = 103
char = );code = 41
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = d;code = 100
char = u;code = 117
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char = e;code = 101
char = d;code = 100
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = o;code = 111
char = s;code = 115
char = e;code = 101
char = -;code = 45
char = d;code = 100
char = e;code = 101
char = p;code = 112
char = e;code = 101
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char = d;code = 100
char = e;code = 101
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char = t;code = 116
char = ;code = 32
char = a;code = 97
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char = t;code = 116
char = e;code = 101
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char = u;code = 117
char = a;code = 97
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
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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
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char = n;code = 110
char = e;code = 101
char = -;code = 45
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = d;code = 100
char = u;code = 117
char = c;code = 99
char = e;code = 101
char = d;code = 100
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result sql = Systemic administration of caffeine reinstates extinguished cocaine self-administration behavior in rats, but the mechanism mediating this behavioral effect has not been established. The present study examined the role of adenosinergic A2 and dopaminergic mechanisms in caffeine-produced cocaine seeking. Following extinction of cocaine self-administration, experimenter-administered injections of caffeine (1.25-20 mg/kg) and theophylline (1-10 mg/kg) dose-dependently reinstated extinguished cocaine-seeking behavior. Administration of the adenosinergic A2 antagonist, 3,7-dimethyl-1-propargylxanthine (DMPX; 0.546-2.18 microg/kg), failed to produce cocaine seeking. Pretreatment with doses of the adenosine A1/A2 agonist 5'-N-ethylcarboxamidoadenosine (NECA; 0.003-0.03 mg/kg) that were below those that produced marked sedation failed to block reinstatement. These data suggest that methylxanthine-produced cocaine seeking is not due to adenosine A2 receptor antagonism. In contrast, pretreatment with the dopaminergic D1-like antagonist SCH 23390 (0.005-0.02 mg/kg) or the D2-like antagonist eticlopride (0.03-0.3 mg/kg) produced a dose-dependent attenuation of caffeine-produced reinstatement at doses that did not decrease cocaine self-administration. These findings suggest that dopaminergic mechanisms underlie the ability of caffeine to reinstate extinguished cocaine-taking behavior.
Publication: Neuropsychopharmacology 2002 Apr ;26(4)::422-30.
Publication Date: 2002 Apr
Study Author(s): Green, Thomas A;Schenk, Susan;
Institution: Department of Psychology, Texas A&M University, College Station, TX, USA.
Shortcut link to this study:
Publication Date: 2002 Apr
Study Author(s): Green, Thomas A;Schenk, Susan;
Institution: Department of Psychology, Texas A&M University, College Station, TX, USA.
Shortcut link to this study:
Systemic administration of caffeine reinstates extinguished cocaine self-administration behavior in rats, but the mechanism mediating this behavioral effect has not been established. The present study examined the role of adenosinergic A2 and dopaminergic mechanisms in caffeine-produced cocaine seeking. Following extinction of cocaine self-administration, experimenter-administered injections of caffeine (1.25-20 mg/kg) and theophylline (1-10 mg/kg) dose-dependently reinstated extinguished cocaine-seeking behavior. Administration of the adenosinergic A2 antagonist, 3,7-dimethyl-1-propargylxanthine (DMPX; 0.546-2.18 microg/kg), failed to produce cocaine seeking. Pretreatment with doses of the adenosine A1/A2 agonist 5'-N-ethylcarboxamidoadenosine (NECA; 0.003-0.03 mg/kg) that were below those that produced marked sedation failed to block reinstatement. These data suggest that methylxanthine-produced cocaine seeking is not due to adenosine A2 receptor antagonism. In contrast, pretreatment with the dopaminergic D1-like antagonist SCH 23390 (0.005-0.02 mg/kg) or the D2-like antagonist eticlopride (0.03-0.3 mg/kg) produced a dose-dependent attenuation of caffeine-produced reinstatement at doses that did not decrease cocaine self-administration. These findings suggest that dopaminergic mechanisms underlie the ability of caffeine to reinstate extinguished cocaine-taking behavior.
PMID: 11927167
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