Abstract:
BACKGROUND:INN 00835 is a synthetic pentapeptide with a potential for rapid onset of action as an antidepressant. Its efficacy was investigated in a pilot study in patients diagnosed with major depression. METHODS:Fifty two patients received either active drug - INN 00835 (26 patients) - or placebo (26 patients), subcutaneously at 0.2 mg/kg for 5 consecutive days. The patients were evaluated for an additional 4 weeks after treatment. Efficacy was evaluated by the following psychiatric rating scales: HAMD, MADRS, CSRS, CGI, and VAS. The effect of treatment was also evaluated by using a biochemical marker: changes in blood platelet serotonin (5HT) uptake rates in drug-treated patients compared to those in the placebo group. Plasma concentrations of INN 00835 were measured by LC/MS. RESULTS:Statistical analysis indicated a strong pharmacodynamic correlation between plasma drug concentrations at 1 h after dosing and the reduction in the severity of depression as measured by the psychiatric rating scales. A minimum effective plasma concentration (MEC) of INN 00835 was 5 ng/ml. Statistically significant differences in response to treatment (P<0.05) were found between patients with plasma concentrations above MEC and those in the placebo group, as well as between subjects with plasma concentrations above and below the MEC. The peak effect was observed after the 5-day treatment and the response to treatment persisted during the 4-week follow-up period. The change of 5HT uptake rates after treatment was significantly larger in the drug-treated group than in the placebo group. LIMITATIONS:This was a pilot study conducted in a relatively small population (52 patients) and the limited number of blood sampling times did not allow a comprehensive pharmacokinetic analysis. There was a relatively large placebo response. The results have to be confirmed in future, large scale studies. CONCLUSIONS:INN 00835 appears to be a promising drug for the treatment of major depression.
journal_name
J Affect Disordjournal_title
Journal of affective disordersauthors
Feighner JP,Ehrensing RH,Kastin AJ,Leonard BE,Sverdlov L,Nicolau G,Patel A,Hlavka J,Abajian H,Noble JFdoi
10.1016/s0165-0327(99)00187-1subject
Has Abstractpub_date
2000-12-01 00:00:00pages
119-26issue
1-2eissn
0165-0327issn
1573-2517pii
S0165-0327(99)00187-1journal_volume
61pub_type
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journal_title:Journal of affective disorders
pub_type: 临床试验,杂志文章,随机对照试验
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