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Growth Hormone Treatment on Phosphocreatine Recovery in Obesity

29. maj 2014 opdateret af: Hideo Makimura, Massachusetts General Hospital

The Effects of Short Term Growth Hormone Treatment on Skeletal Muscle Phosphocreatine Recovery in Obesity

Obesity is associated with reduced growth hormone (GH) secretion. Reduced GH secretion in obesity is associated with increased cardiovascular disease risk. However, it is not yet known how reduced GH increases cardiovascular disease risk in obesity. The investigators hypothesize that reduced GH contributes to dysfunction of the mitochondria. Therefore, the investigators hypothesize that treatment of obese subjects with reduced GH secretion with GH will improve mitochondrial function and that this improvement in mitochondrial function will contribute, in part, to the effects of GH to improve metabolic parameters in obesity. The investigators propose to study skeletal muscle mitochondria in obese subjects with reduced GH secretion using magnetic resonance spectroscopy and muscle biopsies before and after treatment with GH.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

15

Fase

  • Ikke anvendelig

Kontakter og lokationer

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

Studiesteder

  • Forenede Stater
    • Massachusetts
      • Boston, Massachusetts, Forenede Stater, 02114
        • Massachusetts General Hospital

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 60 år (Voksen)

Tager imod sunde frivillige

Ingen

Køn, der er berettiget til at studere

Han

Beskrivelse

Inclusion Criteria:

  1. Men age 18-60 years old
  2. BMI ≥ 30 kg/m2
  3. Waist circumference ≥ 102 cm
  4. Peak GH value of ≤ 4.2 μg/l on standard GHRH-arginine stimulation test

Exclusion Criteria:

  1. Obesity due to a known secondary cause (Cushing's syndrome, hypothyroidism, etc) or a history of gastric bypass procedure.
  2. Subjects who have a known history of diabetes, fasting blood sugar >125 mg/dl or using any anti-diabetic drugs.
  3. Use of Aspirin, Clopidogrel (Plavix), Warfarin (Coumadin) or other anti-coagulants
  4. Subjects on testosterone, glucocorticoids, anabolic steroids, GHRH, GH or IGF-1 within 3 months of enrollment.
  5. Changes in lipid lowering or anti-hypertensive regimen within 3 months of screening
  6. History of pituitary tumor, hypopituitarism, pituitary surgery, pituitary/brain radiation or traumatic brain injury or any other condition known to affect the GH axis.
  7. Severe chronic illness including HIV, active malignancy or history of colon cancer.
  8. Hemoglobin < 9.0 g/dL, SGOT > 2.5 x upper limit normal, Creatinine >1.5 mg/dL, or PSA >5 ng/ml.
  9. Subject is currently enrolled in another investigational device or drug trial(s), or subject has received other investigational agent(s) within 28 days of baseline visit.
  10. Any condition judged by the patient's physician to cause this clinical trial to be detrimental to the patient.
  11. Contraindications to MRI scanning.

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: Ikke-randomiseret
  • Interventionel model: Enkelt gruppeopgave
  • Maskning: Ingen (Åben etiket)

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Væksthormon
Medicin: Growth hormone treatment
Growth hormone 0.4 mg once daily (titrated to IGF-1) by sub-cutaneous injection for 12 weeks.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Phosphocreatine Recovery
Tidsramme: 12-weeks
The primary objective of this study is to determine the effects of growth hormone on mitochondrial function as assessed by 31P-MRS in obese subjects with reduced GH secretion. Mitochondrial function was represented by ViPCr, a measure of phosphocreatine recovery after sub-maximal exercise. Univariate regression analyses was performed to assess the relationship between the change in skeletal muscle IGF-1 mRNA after 12 weeks treatment with rhGH to change in ViPCr.
12-weeks

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in Circulating IGF-1 Concentration
Tidsramme: Baseline and 12-weeks
Change in circulating IGF-1 from Baseline to 12-weeks is reported.
Baseline and 12-weeks
Change in Skeletal Muscle IGF-1 Gene Expression
Tidsramme: Baseline and 12-weeks
Change in skeletal muscle IGF-1 gene mRNA expression from Baseline to 12-weeks is reported.
Baseline and 12-weeks
Change in Body Composition
Tidsramme: Baseline and 12-weeks
Change in waist circumference from Baseline to 12-weeks is reported.
Baseline and 12-weeks
Change in Inflammatory Marker
Tidsramme: Baseline and 12-weeks
Change in high sensitivity C-reactive protein (hsCRP) from Baseline to 12-weeks is reported.
Baseline and 12-weeks
Change in Insulin Sensitivity
Tidsramme: Baseline and 12-weeks
Change in fasting glucose from Baseline to 12-weeks is reported.
Baseline and 12-weeks
Change in Phosphocreatine Recovery
Tidsramme: Baseline and 12-weeks
Change in phosphocreatine recovery, represented by ViPCr, from Baseline to 12-weeks is reported.
Baseline and 12-weeks

Samarbejdspartnere og efterforskere

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

Sponsor

Massachusetts General Hospital

Samarbejdspartnere

Pfizer

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. september 2011

Primær færdiggørelse (Faktiske)

1. marts 2013

Studieafslutning (Faktiske)

1. marts 2013

Datoer for studieregistrering

Først indsendt

19. august 2011

Først indsendt, der opfyldte QC-kriterier

22. august 2011

Først opslået (Skøn)

23. august 2011

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Skøn)

1. juli 2014

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

29. maj 2014

Sidst verificeret

1. maj 2014

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 2011-P-000770

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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