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  • Refractory depression  (1)
  • [123I]β-CIT  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Psychopharmacology 92 (1987), S. 431-437 
    ISSN: 1432-2072
    Schlagwort(e): Reserpine ; Desipramine ; Antidepressants ; Refractory depression ; MHPG ; HVA ; 5-HIAA
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract Early studies showed dramatic improvement in some depressed patients when a brief course of parenteral reserpine was added to ineffective tricyclic antidepressant (TCA) treatment. We treated eight patients with DSM-III melancholic major depression with desipramine (DMI)≥2.5 mg/kg/day (plasma levels〉125 ng/ml) for at least 4 weeks. All patients failed to respond and received reserpine 5 mg IM b.i.d. over 2 days, in seven cases as a placebo-controlled, double-blind trial. One patient had dramatic resolution of depressive and psychotic symptoms within 48 h, but relapsed within 2 weeks; two other patients had transient hypomanic symptoms. Depression ratings did not significantly change for the sample as a whole, but plasma and cerebrospinal fluid (CSF) levels of 3-methoxy-4-hydroxyphenylethyleneglycol (MHPG) decreased and CSF levels of homovanillic acid (HVA) and 5-hydroxy-indoleacetic acid (5-HIAA) increased. Despite robust effects on central monoamine metabolism, reserpine augmentation appears insufficiently effective for routine use in managing refractory depression.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1432-2072
    Schlagwort(e): [123I]β-CIT ; Dopamine transporter ; Cocaine ; Medication development
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The in vivo potency of euphorigenic doses of intravenous cocaine for displacing [123I]β-CIT ([123I]2β-carbomethoxy-3β-(4-iodophenyl)tropane) binding to striatal dopamine transporters (DAT) was assessed in human cocaine addicts using single photon emission computed tomography (SPECT). Cocaine-dependent subjects (n=6) were injected with [123I]β-CIT and imaged 24 h later under equilibrium conditions. Sequential cocaine infusions (0.28±0.03 and 0.56±0.07 mg/kg) produced significant (P〈0.0005) reductions in the specific to non-specific equilibrium partition coefficient, V3″ (6±6 and 17±3%), a measure proportional to DAT binding potential. Regression analysis of the logit transformed data enabled reliable determination of the Hill coefficient (0.51) and 50% displacement (ED50) dose of cocaine (2.8 mg/kg). These preliminary data suggest that cocaine produces behavioral effects in humans at measurable levels of DAT occupancy.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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