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Functional and Metabolic Changes in the Course of Antidepressive Treatment

6 februari 2020 uppdaterad av: Simone Grimm, Charite University, Berlin, Germany

The study will investigate functional and metabolic changes in the course of antidepressive treatments.

The investigators will apply different imaging methods to investigate the effects of antidepressive interventions on resting state neural activity, functional activation during cognitive and emotional stimulation, neurotransmitter concentrations as well as concentrations of brain- derived neurotrophic factor.

Studieöversikt

Status

Avslutad

Betingelser

Detaljerad beskrivning

The study will investigate functional and metabolic changes in the course of antidepressive treatments.

The investigators will apply different imaging methods to investigate the effects of antidepressive interventions on resting state neural activity, functional activiation during cognitive and emotional stimulation, neurotransmitter concentrations as well as concentrations of brain- derived neurotrophic factor.

The investigators hypothesize that antidepressive interventions modulate the excitatory glutamatergic system and thereby increase either the concentration of glutamate or the glutamate/ glutamine ratio. These metabolic changes are accompanied by altered functional activation in medial and lateral prefrontal areas during emotional and cognitive stimulation, respectively. After longterm treatment, excitatory glutamate and inhibitory gamma-aminobutyric acid concentrations adapt to a new homeostatic level which is reflected in antidepressive response or remission of symptoms. The investigators assume that the levels of glutamate and gamma-aminobutyric acid determine the amplitude of BOLD responses during emotional and cognitive stimulation. Furthermore, the investigators hypothesize that the plasma concentration of brain- derived neurotrophic factor might be a predictor for therapy response and changes in the course of treatment.

With our protocol we adhere to the rules of good scientific practice and observe all relevant laws, regulations and guidelines that pertain to the project. The investigators' study is in compliance with the Declaration of Helsinki and approved by the local ethics committee. Storage of data is in accordance with german privacy laws.

Studietyp

Observationell

Inskrivning (Faktisk)

40

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

18 år till 65 år (Vuxen, Äldre vuxen)

Tar emot friska volontärer

Nej

Kön som är behöriga för studier

Allt

Testmetod

Icke-sannolikhetsprov

Studera befolkning

depressive patients from a primary care clinic

Beskrivning

Inclusion Criteria:

  • age 18- 65 years
  • current depressive episode
  • males and females
  • Intelligence quotient > 80
  • written informed consent

Exclusion Criteria:

  • neurological or psychiatric disease other than major depressive disorder
  • metal implants, pacemaker, intracranial clips
  • agoraphobia
  • history of serious head injury

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change in neurotransmitter concentrations (glutamate, glutamine, gamma-aminobutyric acid) from baseline to response to antidepressive intervention
Tidsram: Neurotransmitter concentrations will be measured at baseline (T0), after the first antidepressive intervention (T1; 24- 48 hrs. after baseline measurement) and after patients show response or remission of symptoms (T2; an expected average of 2- 4 weeks)
Neurotransmitter concentrations will be measured at 3 timepoints (at baseline, after the first antidepressive intervention and after patients show response or remission of symptoms). Measurements will show whether antidepressive interventions modulate the excitatory glutamatergic system and thereby increase either the concentration of glutamate or the glutamate/ glutamine ratio. After longterm treatment, excitatory glutamate and inhibitory gamma-aminobutyric acid concentrations are hypothesized to adapt to a new homeostatic level which is reflected in antidepressive response or remission of symptoms.
Neurotransmitter concentrations will be measured at baseline (T0), after the first antidepressive intervention (T1; 24- 48 hrs. after baseline measurement) and after patients show response or remission of symptoms (T2; an expected average of 2- 4 weeks)

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change in neuronal activation patterns from baseline to response to antidepressive intervention
Tidsram: Measurements will be conducted at baseline (T0), after the first antidepressive intervention (T1; 24- 48 hrs. after baseline measurement) and after patients show response or remission of symptoms (T2; an expected average of 2- 4 weeks)
Neuronal activation patterns will be measured at 3 timepoints (at baseline, after the first antidepressive intervention and after patients show response or remission of symptoms). Measurements will show whether antidepressive interventions modulate resting state neural activity and functional activiation during cognitive and emotional stimulation. We expect changes in neurotransmitter concentrations to be accompanied by altered functional activation in medial and lateral prefrontal areas during emotional and cognitive stimulation, respectively. Furthermore, levels of glutamate and gamma-aminobutyric acid are hypothesized to determine the amplitude of BOLD responses during emotional and cognitive stimulation.
Measurements will be conducted at baseline (T0), after the first antidepressive intervention (T1; 24- 48 hrs. after baseline measurement) and after patients show response or remission of symptoms (T2; an expected average of 2- 4 weeks)

Andra resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Change in brain- derived neurotrophic factor concentration from baseline to response to antidepressive intervention
Tidsram: Measurements will be conducted at baseline (T0), after the first antidepressive intervention (T1; 24- 48 hrs. after baseline measurement) and after patients show response or remission of symptoms (T2; an expected average of 2- 4 weeks)
Brain- derived neurotrophic factor concentrations will be measured at 3 timepoints (at baseline, after the first antidepressive intervention and after patients show response or remission of symptoms). Measurements will show whether the plasma concentration of brain- derived neurotrophic factor might be a predictor for therapy response and changes in the course of treatment.
Measurements will be conducted at baseline (T0), after the first antidepressive intervention (T1; 24- 48 hrs. after baseline measurement) and after patients show response or remission of symptoms (T2; an expected average of 2- 4 weeks)

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Charite University, Berlin, Germany

Publikationer och användbara länkar

Den som ansvarar för att lägga in information om studien tillhandahåller frivilligt dessa publikationer. Dessa kan handla om allt som har med studien att göra.

Allmänna publikationer

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart

1 mars 2014

Primärt slutförande (Faktisk)

1 november 2019

Avslutad studie (Faktisk)

1 februari 2020

Studieregistreringsdatum

Först inskickad

20 mars 2014

Först inskickad som uppfyllde QC-kriterierna

26 mars 2014

Första postat (Uppskatta)

31 mars 2014

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

7 februari 2020

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

6 februari 2020

Senast verifierad

1 februari 2020

Mer information

Termer relaterade till denna studie

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • EMOKET-103/13

Denna information hämtades direkt från webbplatsen clinicaltrials.gov utan några ändringar. Om du har några önskemål om att ändra, ta bort eller uppdatera dina studieuppgifter, vänligen kontakta register@clinicaltrials.gov. Så snart en ändring har implementerats på clinicaltrials.gov, kommer denna att uppdateras automatiskt även på vår webbplats .

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