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Intranasal Insulin Treatment in Patients With Schizophrenia

15. november 2012 opdateret af: Xiaoduo Fan, University of Massachusetts, Worcester
This study is an 8-week, randomized, double-blind, placebo-controlled trial of intranasal insulin as an adjunctive therapy, with a 4-week follow-up, in 60 non-diabetic schizophrenia subjects to examine insulin's effect on psychopathology and cognition. In addition, the study will examine insulin's effects on weight, food intake, resting energy expenditure, and body composition.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

The specific aims include:

Primary aims

  1. Examine the efficacy of intranasal regular insulin (40 IU 4 times per day) in improving cognitive deficits in patients with schizophrenia.
  2. Examine the efficacy of intranasal regular insulin in improving negative symptoms and positive symptoms of schizophrenia.

Secondary aims

  1. Examine intranasal insulin's effects on weight, food intake and resting energy expenditure.
  2. Examine intranasal insulin's effects on body composition, waist circumference, and waist/hip ratio.

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

45

Fase

  • Fase 4

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Forenede Stater
    • Massachusetts
      • Worcester, Massachusetts, Forenede Stater, 01605
        • University of Massachusetts Medical School

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

18 år til 65 år (Voksen, Ældre voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Alle

Beskrivelse

Inclusion Criteria:

  1. Age 18-65 years.
  2. Diagnosis of schizophrenia, any subtype or schizoaffective disorder, any subtype.
  3. Stable dose of the current antipsychotic drug for at least one month.
  4. Well established compliance with outpatient treatment per treating clinician's judgement.
  5. Able to complete the cognitive assessment battery (must be English speaking).
  6. Female subjects will be eligible to participate in the study if they are of non-childbearing potential or of child-bearing potential and willing to practice appropriate birth control methods (complete abstinence from sexual intercourse, female sterilization, sterilization of male partner, implants of levonorgestrel, injectable progestogen, oral contraceptives, intrauterine devices, or double barrier methods of contraception using spermicide with either a condom or diaphragm) during the study.

Exclusion Criteria:

  1. Inability to provide informed consent.
  2. Current substance abuse.
  3. Psychiatrically unstable per treating clinician's judgement.
  4. Significant medical illnesses including uncontrolled hypertension, diabetes, seizure. disorder, severe cardiovascular, cerebrovascular, pulmonary, or thyroid diseases.
  5. Pregnancy or breastfeeding.

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Firedobbelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Placebo komparator: B
Lægemiddel: Placebo
Medicin: Insulin or Placebo
intranasal, 40IU, 4 times daily
Eksperimentel: A
Intranasal Insulin Treatment
Medicin: Insulin or Placebo
intranasal, 40IU, 4 times daily

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Cognitive Function- Digit Span Total
Tidsramme: Week 8
Subjects completed the digit span task. Assessment was completed at Screening/Baseline, Week 4, and Week 8. Higher scores represent higher recall accuracy, and therefore less advanced psychopathology. Min score= 0, Max score= 30. Week 8 values are displayed below.
Week 8
Cognitive Function- Verbal Fluency
Tidsramme: Week 8
Subjects completed a verbal fluency test. Assessment was completed at Screening/Baseline, Week 4, and Week 8. Higher scores represent higher levels of verbal fluency, and therefore less advanced psychopathology. Min score= 0, Max score= N/A. Week 8 values are displayed below.
Week 8
Cognitive Function- HVLT Immediate Recall Total
Tidsramme: Week 8
Subjects completed a word recall task. Assessment was completed at Screening/Baseline, Week 4, and Week 8. Higher scores represent higher recall accuracy, and therefore less advanced psychopathology. Min score= 0, Max score= 36. Week 8 values are displayed below.
Week 8
Cognitive Function- HVLT Delayed Recall Total
Tidsramme: Week 8
Subjects completed a delayed word recall task. Assessments were completed at Screening/Baseline, Week 4, and Week 8. Higher scores represent higher recall accuracy, and therefore less advanced psychopathology. Min score= 0, Max score= 12. Week 8 values are displayed below.
Week 8
Cognitive Function- Trails A
Tidsramme: Week 8
Subjects completed a timed "trails" (i.e. connect-the-dots) test. Assessments were completed at Screening/Baseline, Week 4, and Week 8. Scores were measured by time to complete in seconds. Max score= N/A. Lower values represent less advanced psychopathology. Week 8 values are displayed below.
Week 8
Cognitive Function- Trails B
Tidsramme: Week 8
Subjects completed a timed "trails" (i.e. connect the dots) test. Assessments were completed at Screening/Baseline, Week 4, and Week 8. Scores were mesured by time to complete in seconds. Max score= N/A. Lower values represent less advanced psychopathology. Week 8 values are displayed below.
Week 8
Cognitive Function- CPT D Prime Score
Tidsramme: Week 8
Subjects completed a computer-based cognitive test designed to measure sustained attention (attention to a specific stimulus 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. Higher scores represent less advanced psychopathology. Week 8 values are displayed below.
Week 8
Cognitive Function- CPT Hits Rate (Proportion)
Tidsramme: Week 8
Subjects completed a computer-based cognitive test. The test is described in detail in a previous outcome measure ("CPT d prime score"). Hits rate was defined as the proportion of correct responses to the relevant stimuli (response to two identical targets) compared to total responses (total hits). Assessments were completed at Screening/Baseline, Week 4, and Week 8. Hits rate as a proportion of total hits was measured. Min score= 0, Max score= 1.0. Higher values represent higher stimulus recognition accuracy, and thus less advanced psychopathology. Week 8 values are displayed below.
Week 8
Cognitive Function- CPT Reaction Time of Hits (Milliseconds)
Tidsramme: Week 8
Subjects completed a computer-based cognitive functioning test designed to measure sustained attention (attention to a stimulus over a period of several minutes). The test is described in detail in a previous outcome measure ("CPT d prime score"). Reaction time of hits is defined as the average time each participant took to respond correctly to relevant stimuli. Assessments were completed at Screening/Baseline, Week 4, and Week 8. Reaction time was measured in milliseconds. Max score= N/A. Lower values represent less advanced psychopathology. Week 8 values are displayed below.
Week 8
Cognitive Function- CPT False-alarm Rate (Proportion)
Tidsramme: Week 8
Subjects completed a computer-based cognitive functioning test designed to measure sustained attention (attention to a stimulus over a period of several minutes). False alarm rate is defined as the proportion of overall hits that were in response to an incorrect stimulus (two consecutive non-identical targets). Assessments were completed at Screening/Baseline, Week 4, and Week 8. False-alarm hits were measured as a proportion of total hits. Min score= 0, Max score= 1.0. Lower values represent higher hit accuracy and less advanced psychopathology. Week 8 values are displayed below.
Week 8
Psychopathology- PANSS Total
Tidsramme: Week 8
Positive symptoms, negative symptoms, and general psychopatholgy of schizophrenia were measured at Screening/Baseline, Week 4, and Week 8. The assessment consisted of 30 total items, with each item measured on a seven-point scale (1= absent, 4= moderate, 7= extreme). Min score= 30, Max score= 210. Higher scores represent more advanced psychopathology. Week 8 values are displayed below.
Week 8
Psychopathology- PANSS Positive
Tidsramme: Week 8
Positive symptoms of schizophrenia were measured at Screening/Baseline, Week 4, and Week 8. The assessment consisted of seven items, with each item measured on a seven-point scale (1= absent, 4= moderate, 7= extreme). Min score= 7, Max score= 49. Higher scores represent more advanced psychopathology. Week 8 values are displayed below.
Week 8
Psychopathology- PANSS Negative
Tidsramme: Week 8
Negative symptoms of schizophrenia were measured at Screening/Baseline, Week 4, and Week 8. Assessment consisted of seven-items, with each item measured on a seven-point scale (1= absent, 4= moderate, 7= extreme). Min score= 7, Max score= 49. Higher scores represent more advanced psychopathology. Week 8 values are displayed below.
Week 8
Psychopathology- PANSS General Psychopathology
Tidsramme: Week 8
General psychopathology was measured at Screening/Baseline, Week 4, and Week 8. The assessment consisted of 16 items, with each item measured on a seven-point scale (1= absent, 4= moderate, 7= extreme). Min score= 16, Max score= 112. Higher scores represent more advanced psychopathology. Week 8 values are displayed below.
Week 8
Psychopathology- SANS Total
Tidsramme: Week 8
Negative symptoms of schizophrenia were measured at Screening/Baseline, Week 4, and Week 8. Assessment consisted of 25 items, with each item measured on a six-point scale (0= none, 3= moderate, 5= severe). Min score= 0, Max score= 125. Higher scores represent more advanced psychopathology. Week 8 values are displayed below.
Week 8
Psychopathology- CDSS Total
Tidsramme: Week 8
Symptoms of depression were measured at Screening/Baseline, Week 4, and Week 8. Assessment consisted of 9 items, with each item measured on a four-point scale (0= absent, 3= severe). Min score= 0, Max score= 27. Higher scores represent more advanced psychopathology. Week 8 values are displayed below.
Week 8
Psychopathology- QLS Total
Tidsramme: Week 8
Quality of life was measured at Screening/Baseline, Week 4, and Week 8. Assessment consisted of 21 items, with each item measured on a seven-point scale (0= not present, 3= sometimes present, 6= always present). Min score= 0, Max score= 126. Higher scores represent lower quality of life. Week 8 values are displayed below.
Week 8

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

University of Massachusetts, Worcester

Samarbejdspartnere

Eli Lilly and Company
National Alliance for Research on Schizophrenia and Depression

Efterforskere

  • Ledende efterforsker: Xiaoduo Fan, MD, MPH, MS, UMass Medical School

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart

1. december 2007

Primær færdiggørelse (Faktiske)

1. september 2010

Studieafslutning (Faktiske)

1. september 2010

Datoer for studieregistrering

Først indsendt

14. december 2007

Først indsendt, der opfyldte QC-kriterier

14. december 2007

Først opslået (Skøn)

18. december 2007

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

17. december 2012

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. november 2012

Sidst verificeret

1. november 2012

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 2007-P-000731

Disse oplysninger blev hentet direkte fra webstedet clinicaltrials.gov uden ændringer. Hvis du har nogen anmodninger om at ændre, fjerne eller opdatere dine undersøgelsesoplysninger, bedes du kontakte register@clinicaltrials.gov. Så snart en ændring er implementeret på clinicaltrials.gov, vil denne også blive opdateret automatisk på vores hjemmeside .

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Betingelser

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Kosttilskud

Sponsor / samarbejdspartnere

Placeringer

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