Abstract
Electrical stimulation of the medial forebrain bundle increases 32P incorporation into striatal tyrosine hydroxylase (TH) at Ser19, Ser31, and Ser40. In the present studies, the effects of acute haloperidol and related drugs on site-specific TH phosphorylation stoichiometry (PS) in the nigrostriatal and mesolimbic systems were determined by quantitative blot immunolabeling using phosphorylation state-specific antibodies. The striatum (Str), substantia nigra (SN), nucleus accumbens (NAc), and ventral tegmental area (VTA) from Sprague-Dawley rats were harvested 30-40 min after a single injection of either vehicle, haloperidol (2 mg/kg), raclopride (2 mg/kg), clozapine (30 mg/kg), or SCH23390 (0.5 mg/kg). In vehicle-injected control rats, Ser19 PS was 1.5- to 2.5-fold lower in Str and NAc than in SN and VTA, Ser31 PS was two- to fourfold higher in Str and NAc than in SN and VTA, and Ser40 PS was similar between the terminal field and cell body regions. After haloperidol, Ser40 PS increased twofold in Str and NAc, whereas a smaller increase in SN and VTA was observed. The effects of haloperidol on Ser19 PS were similar to those on Ser40 in each region; however, haloperidol treatment increased Ser31 PS at least 1.6-fold in all regions. The effects of raclopride on TH PS were comparable to those of haloperidol, whereas clozapine treatment increased TH PS at all sites in all regions. By contrast, the effects of SCH23390 on TH PS were relatively small and restricted to the NAc. The stoichiometries of site-specific TH phosphorylation in vivo are presented for the first time. The nigrostriatal and mesolimbic systems have common features of TH PS, distinguished by differences in TH PS between the terminal field and cell body regions and by dissimilar increases in TH PS in the terminal field and cell body regions after acute haloperidol.
| Original language | English |
|---|---|
| Pages (from-to) | 225-232 |
| Number of pages | 8 |
| Journal | Journal of Neurochemistry |
| Volume | 75 |
| Issue number | 1 |
| DOIs | |
| State | Published - 11 Jul 2000 |
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Keywords
- Catecholamine
- Clozapine
- Labile epitopes
- Raclopride
- SCH23390
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Stoichiometry of tyrosine hydroxylase phosphorylation in the nigrostriatal and mesolimbic systems in vivo : Effects of acute haloperidol and related compounds. / Salvatore, Michael Francis; Garcia-Espana, Antonio; Goldstein, Menek; Deutch, Ariel Y.; Haycock, John W.
In: Journal of Neurochemistry, Vol. 75, No. 1, 11.07.2000, p. 225-232.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Stoichiometry of tyrosine hydroxylase phosphorylation in the nigrostriatal and mesolimbic systems in vivo
T2 - Effects of acute haloperidol and related compounds
AU - Salvatore, Michael Francis
AU - Garcia-Espana, Antonio
AU - Goldstein, Menek
AU - Deutch, Ariel Y.
AU - Haycock, John W.
PY - 2000/7/11
Y1 - 2000/7/11
N2 - Electrical stimulation of the medial forebrain bundle increases 32P incorporation into striatal tyrosine hydroxylase (TH) at Ser19, Ser31, and Ser40. In the present studies, the effects of acute haloperidol and related drugs on site-specific TH phosphorylation stoichiometry (PS) in the nigrostriatal and mesolimbic systems were determined by quantitative blot immunolabeling using phosphorylation state-specific antibodies. The striatum (Str), substantia nigra (SN), nucleus accumbens (NAc), and ventral tegmental area (VTA) from Sprague-Dawley rats were harvested 30-40 min after a single injection of either vehicle, haloperidol (2 mg/kg), raclopride (2 mg/kg), clozapine (30 mg/kg), or SCH23390 (0.5 mg/kg). In vehicle-injected control rats, Ser19 PS was 1.5- to 2.5-fold lower in Str and NAc than in SN and VTA, Ser31 PS was two- to fourfold higher in Str and NAc than in SN and VTA, and Ser40 PS was similar between the terminal field and cell body regions. After haloperidol, Ser40 PS increased twofold in Str and NAc, whereas a smaller increase in SN and VTA was observed. The effects of haloperidol on Ser19 PS were similar to those on Ser40 in each region; however, haloperidol treatment increased Ser31 PS at least 1.6-fold in all regions. The effects of raclopride on TH PS were comparable to those of haloperidol, whereas clozapine treatment increased TH PS at all sites in all regions. By contrast, the effects of SCH23390 on TH PS were relatively small and restricted to the NAc. The stoichiometries of site-specific TH phosphorylation in vivo are presented for the first time. The nigrostriatal and mesolimbic systems have common features of TH PS, distinguished by differences in TH PS between the terminal field and cell body regions and by dissimilar increases in TH PS in the terminal field and cell body regions after acute haloperidol.
AB - Electrical stimulation of the medial forebrain bundle increases 32P incorporation into striatal tyrosine hydroxylase (TH) at Ser19, Ser31, and Ser40. In the present studies, the effects of acute haloperidol and related drugs on site-specific TH phosphorylation stoichiometry (PS) in the nigrostriatal and mesolimbic systems were determined by quantitative blot immunolabeling using phosphorylation state-specific antibodies. The striatum (Str), substantia nigra (SN), nucleus accumbens (NAc), and ventral tegmental area (VTA) from Sprague-Dawley rats were harvested 30-40 min after a single injection of either vehicle, haloperidol (2 mg/kg), raclopride (2 mg/kg), clozapine (30 mg/kg), or SCH23390 (0.5 mg/kg). In vehicle-injected control rats, Ser19 PS was 1.5- to 2.5-fold lower in Str and NAc than in SN and VTA, Ser31 PS was two- to fourfold higher in Str and NAc than in SN and VTA, and Ser40 PS was similar between the terminal field and cell body regions. After haloperidol, Ser40 PS increased twofold in Str and NAc, whereas a smaller increase in SN and VTA was observed. The effects of haloperidol on Ser19 PS were similar to those on Ser40 in each region; however, haloperidol treatment increased Ser31 PS at least 1.6-fold in all regions. The effects of raclopride on TH PS were comparable to those of haloperidol, whereas clozapine treatment increased TH PS at all sites in all regions. By contrast, the effects of SCH23390 on TH PS were relatively small and restricted to the NAc. The stoichiometries of site-specific TH phosphorylation in vivo are presented for the first time. The nigrostriatal and mesolimbic systems have common features of TH PS, distinguished by differences in TH PS between the terminal field and cell body regions and by dissimilar increases in TH PS in the terminal field and cell body regions after acute haloperidol.
KW - Catecholamine
KW - Clozapine
KW - Labile epitopes
KW - Raclopride
KW - SCH23390
UR - http://www.scopus.com/inward/record.url?scp=0034085534&partnerID=8YFLogxK
U2 - 10.1046/j.1471-4159.2000.0750225.x
DO - 10.1046/j.1471-4159.2000.0750225.x
M3 - Article
VL - 75
SP - 225
EP - 232
JO - Journal of Neurochemistry
JF - Journal of Neurochemistry
SN - 0022-3042
IS - 1
ER -