Effect of Single Dose Intranasal Insulin On Cognitive Function
12 febbraio 2013 aggiornato da: Xiaoduo Fan, University of Massachusetts, Worcester
Effect of Single Dose Intranasal Insulin on Cognitive Function in Patients With Schizophrenia
The purpose of the study is to find out how a small dose of insulin might affect memory, the ability to concentrate, and improve your daily functioning in patients with schizophrenia and schizoaffective disorders. Insulin is not being used to treat diabetes in this study. The investigators propose a single dose, double-blinded, placebo-controlled trial of intranasal insulin in 40 subjects with schizophrenia or schizoaffective disorder to examine insulin's effect on cognition. The specific aims include:
- Examine the effects of single doses of 40 IU intranasal insulin compared to placebo on cognitive functioning, including attention and memory.
- Examine whether single dose of intranasal insulin administration will raise serum insulin level and decrease plasma glucose level
Insulin will be delivered through an air spray pump into your nose. The investigators will be comparing one dose of insulin (40 International Units) with placebo, an inactive liquid.
Panoramica dello studio
Stato
Completato
Condizioni
Intervento / Trattamento
Descrizione dettagliata
Insulin signaling in the brain is associated with improved cognitive function in both animal and human studies.
Intranasal administration of insulin, which is non-invasive and minimizes the risk of hypoglycemia, may represent a new intervention approach with the potential to improve cognition and real life functioning in this patient with schizophrenia.
Tipo di studio
Interventistico
Iscrizione (Effettivo)
30
Fase
- Fase 4
Contatti e Sedi
Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.
Luoghi di studio
-
-
Massachusetts
-
Boston, Massachusetts, Stati Uniti, 02114
- Freedom Trail Clinic
-
-
Criteri di partecipazione
I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.
Criteri di ammissibilità
Età idonea allo studio
Da 18 anni a 65 anni (Adulto, Adulto più anziano)
Accetta volontari sani
Sì
Sessi ammissibili allo studio
Tutto
Descrizione
Inclusion Criteria:
- Age 18-65 years
- Diagnosis of schizophrenia, any subtype or schizoaffective disorder, any subtype
- Male or female
- Stable dose of the current antipsychotic drug for at least one month
- Well established compliance with out-patient treatment per treating clinician's judgement.
- Able to complete the cognitive assessment battery (must be English speaking)
Exclusion Criteria:
- Inability to provide informed consent
- Current substance abuse
- On clozapine or olanzapine
- Psychiatrically unstable per treating clinician's judgement.
- Significant medical illnesses including uncontrolled hypertension, diabetes, seizure disorder, severe cardiovascular, cerebrovascular, pulmonary, or thyroid diseases etc.
- Incapable to complete the cognitive battery assessment.
Piano di studio
Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Trattamento
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Triplicare
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
|
Comparatore placebo: Placebo (1)
Subjects are given a one-time, single dose of placebo intranasal spray
|
Placebo
|
|
Sperimentale: Single-Dose Intranasal Insulin
Subjects are given a one-time, single dose of intranasal insulin
|
40 IU Intranasal Insulin will be administered once
Altri nomi:
|
Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
Improvement in Cognitive Function- HVLT Immediate Recall Total (Number)
Lasso di tempo: pretreatment= in the morning; postreatment= in the afternoon, 30 minutes after intranasal spray administration
|
Subjects performed the HVLT Immediate Recall Task.
For this task, participants were read aloud a list of 12 words from three taxonomic categories.
Participants were read the list three separate times, and after each reading were immediately asked to recall as many words from the list as they could.
The number of words recalled successfully was measured before and after intranasal treatment.
Values below represent posttreatment performance minus pretreatment performance.
|
pretreatment= in the morning; postreatment= in the afternoon, 30 minutes after intranasal spray administration
|
|
Improvement in Cognitive Function- HVLT-Delayed Recall (Number)
Lasso di tempo: pretreatment= in the morning; postreatment= in the afternoon, 30 minutes after intranasal spray administration
|
Subjects performed the HVLT word recall task after a 20-minute delay before and after intranasal treatment.
In the HVLT delayed recall task, participants were asked to recall the same list of 12 words dictated in the immediate recall task 20 minutes after the completion of the immediate recall task.
Words successfully recalled after the 20-minute delay were measured.
Values below represent posttreatment performance minus pretreatment performance.
|
pretreatment= in the morning; postreatment= in the afternoon, 30 minutes after intranasal spray administration
|
|
CPT d Score
Lasso di tempo: pretreatment= in the morning; postreatment= in the afternoon, 30 minutes after intranasal spray administration
|
Subjects performed a computer-based test designed to measure sustained attention (attention to a specific stimuli over a period of several minutes) before and after intranasal treatment.
During this test, participants respond as quickly as possible to any consecutive presentation of identical stimuli on the computer screen.
The stimuli (2, 3, and 4-digit targets) were presented with increasing cognitive load in successive blocks.
Correct responses, responses made to the second of 2 identical stimuli presented in a row, were scored as hits.
False alarms were also recorded.
The "d prime score" is a score given to each participant on a scale of 0.0- 1.0 in which discrimination sensitivity is measured.
A score of zero equates to no sensitivity, whereas a score of 1.0 equates to perfect sensitivity.
Values below represent postreatment performance minus pretreatment performance.
|
pretreatment= in the morning; postreatment= in the afternoon, 30 minutes after intranasal spray administration
|
|
Improvement in Cognitive Function- CPT Hits Rate (Proportion)
Lasso di tempo: pretreatment= in the morning; postreatment= in the afternoon, 30 minutes after intranasal spray administration
|
Subjects performed a computer-based test designed to measure sustained attention before and after intranasal treatment.
The task is described in the previous outcome measure ("CPT d score").
Hits rate refers to each participant's ability to correctly respond to two consecutive target presentations (i.e.
correct responses).
Hits rate was measured as a proportion of overall attempts (0= no hits, 1.0= 100% accuracy on hits).
Values below represent posttreatment performance minus pretreatment performance.
|
pretreatment= in the morning; postreatment= in the afternoon, 30 minutes after intranasal spray administration
|
|
Improvement in Cognitive Function- CPT Reaction Time of Hits (Milliseconds)
Lasso di tempo: pretreatment= in the morning; postreatment= in the afternoon, 30 minutes after intranasal spray administration
|
Subjects performed a computer-based test designed to measure sustained attention before and after intranasal treatment.
The task is described in detail in a previous outcome measure ("CPT d score").
Reaction time of hits refers to the average time each participant took to correctly respond to a stimuli in milliseconds.
Values below represent posttreatment performance minus pretreatment performance.
|
pretreatment= in the morning; postreatment= in the afternoon, 30 minutes after intranasal spray administration
|
|
Improvement in Cognitive Function- CPT False Alarm Rate (Proportion)
Lasso di tempo: pretreatment= in the morning; postreatment= in the afternoon, 30 minutes after intranasal spray administration
|
Subjects performed a computer-based test designed to measure sustained attention before and after intranasal treatment.
The task is described in detail in a previous outcome measure ("CPT d score").
False alarm rate refers to the proportion of overall attempts that were characterized as incorrect responses (responses to two non-identical targets).
Values below represent posttreatment performance minus pretreatment performance.
|
pretreatment= in the morning; postreatment= in the afternoon, 30 minutes after intranasal spray administration
|
Collaboratori e investigatori
Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.
Investigatori
- Investigatore principale: Xiaoduo Fan, MD, MPH, MS, UMass Medical School
Studiare le date dei record
Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.
Studia le date principali
Inizio studio
1 ottobre 2006
Completamento primario (Effettivo)
1 gennaio 2010
Completamento dello studio (Effettivo)
1 gennaio 2010
Date di iscrizione allo studio
Primo inviato
31 gennaio 2008
Primo inviato che soddisfa i criteri di controllo qualità
27 marzo 2008
Primo Inserito (Stima)
28 marzo 2008
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Stima)
15 febbraio 2013
Ultimo aggiornamento inviato che soddisfa i criteri QC
12 febbraio 2013
Ultimo verificato
1 febbraio 2013
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Termini MeSH pertinenti aggiuntivi
Altri numeri di identificazione dello studio
- 4-2006
- CORRC tracking number: 4-2006
Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .