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Role of Glucagon In Glucose Control in Cystic Fibrosis Related Diabetes

24 juni 2020 bijgewerkt door: Yale University

Role of Glucagon in Glucose Control in Cystic Fibrosis Related Diabetes

This project is designed to begin to characterize the abnormalities of glucagon secretion in subjects with cystic fibrosis related diabetes along the spectrum of glucose tolerance. Cystic fibrosis patients with normal glucose tolerance as well as cystic fibrosis related diabetes as well as control subjects will undergo an oral glucose tolerance test, mixed meal tolerance test, and one step hypoglycemic clamp. Cystic fibrosis patients will then return 12 months later to undergo repeat mixed meal tolerance test and hypoglycemic clamp test.

Studie Overzicht

Toestand

Voltooid

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

This project is designed to begin to characterize the abnormalities of glucagon secretion in subjects with cystic fibrosis related diabetes along the spectrum of glucose tolerance. This will be a descriptive, cross-sectional and longitudinal cohort study in a sample of children and young adults with CF and a continuum of glucose tolerance compared to healthy age-matched controls.

Cystic fibrosis patients with normal glucose tolerance as well as cystic fibrosis related diabetes as well as control subjects will be admitted to the research unit on three separate occasions to undergo an oral glucose tolerance test, mixed meal tolerance test, and one step hypoglycemic clamp. Cystic fibrosis patients will then return 12 months later to undergo repeat mixed meal tolerance test and hypoglycemic clamp test.

Studietype

Ingrijpend

Inschrijving (Werkelijk)

7

Fase

  • Vroege fase 1

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studie Locaties

  • Verenigde Staten
    • Connecticut
      • New Haven, Connecticut, Verenigde Staten, 06511
        • Yale New Haven Hospital

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

12 jaar tot 45 jaar (Kind, Volwassen)

Accepteert gezonde vrijwilligers

Ja

Geslachten die in aanmerking komen voor studie

Allemaal

Beschrijving

Inclusion Criteria:

  • Diagnosis of CF by clinical or genetic determination
  • Normal glucose tolerance or CFRD
  • Subjects routinely taking systemic or inhaled glucocorticoids on stable regimen are eligible

Exclusion Criteria:

  • Subjects with active pulmonary infection requiring supplemental doses of corticosteroids
  • Use of any oral diabetes medications
  • Subjects who are pregnant/lactating
  • Subjects with poor compliance with pancreatic enzyme replacement therapy

Control Subjects:

Approximately 10 control subjects who are matched for age, gender, are expected to be enrolled in the study. Non-CF subjects must be >12 years old, in good health and not taking any medications or have any medical problems the doctor feels would prevent the subject from completing the study and have BMI between 15-85% for age and gender. Control subjects whose fasting blood glucose is found to be >110 mg/dL will not be continued in the study.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Fundamentele wetenschap
  • Toewijzing: Niet-gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: CF with Normal Glucose Tolerance
Individuals with CF without cystic fibrosis related diabetes
Ander: Oral Glucose Tolerance Test
Subjects will be instructed to fast after midnight the night prior to the study. Subjects will be admitted to the research unit on the morning of the test for placement of blood-drawing IV for frequent sampling. Patients will drink 1.75 gm/kg glucose (Glucola) to a maximum of 75 gm. Venous samples for glucose and c-peptide will be drawn from the IV at 0, 30, 60, 90 and 120 minutes. Subjects will be instructed to eat at least 75 gm carbohydrates daily in the week prior to this test.
Ander: Mixed Meal Tolerance Test
Subjects will be instructed to fast after midnight the night prior to the study. Subjects will be admitted to the research unit on the morning of the test for placement of blood-drawing IV for frequent sampling. Subjects will consume 6 kcal/kg (6 ml/kg) Boost High Protein Nutritional Energy Drink (Mead-Johnson) over five minutes to a maximum of 360 ml. Venous samples for glucose, glucagon, GLP-1, GIP, and c-peptide will be drawn at -10, 0, 15, 30, 60, 90, 120, 150, 180, 210, and 240 minutes.
Ander: Hypoglycemic Clamp
All subjects with CF and adult (but not pediatric) controls will undergo one-step hypoglycemic clamp. Subjects will be instructed to fast after midnight the night prior to the study. Subjects will be admitted to the research unit on the morning of the test for placement of blood-drawing IV for frequent sampling and a second IV for infusion of insulin and dextrose.
Experimenteel: Cystic Fibrosis Related Diabetes
Individuals with cystic fibrosis and cystic fibrosis related diabetes
Ander: Oral Glucose Tolerance Test
Subjects will be instructed to fast after midnight the night prior to the study. Subjects will be admitted to the research unit on the morning of the test for placement of blood-drawing IV for frequent sampling. Patients will drink 1.75 gm/kg glucose (Glucola) to a maximum of 75 gm. Venous samples for glucose and c-peptide will be drawn from the IV at 0, 30, 60, 90 and 120 minutes. Subjects will be instructed to eat at least 75 gm carbohydrates daily in the week prior to this test.
Ander: Mixed Meal Tolerance Test
Subjects will be instructed to fast after midnight the night prior to the study. Subjects will be admitted to the research unit on the morning of the test for placement of blood-drawing IV for frequent sampling. Subjects will consume 6 kcal/kg (6 ml/kg) Boost High Protein Nutritional Energy Drink (Mead-Johnson) over five minutes to a maximum of 360 ml. Venous samples for glucose, glucagon, GLP-1, GIP, and c-peptide will be drawn at -10, 0, 15, 30, 60, 90, 120, 150, 180, 210, and 240 minutes.
Ander: Hypoglycemic Clamp
All subjects with CF and adult (but not pediatric) controls will undergo one-step hypoglycemic clamp. Subjects will be instructed to fast after midnight the night prior to the study. Subjects will be admitted to the research unit on the morning of the test for placement of blood-drawing IV for frequent sampling and a second IV for infusion of insulin and dextrose.
Actieve vergelijker: Control
Age matched control subjects
Ander: Oral Glucose Tolerance Test
Subjects will be instructed to fast after midnight the night prior to the study. Subjects will be admitted to the research unit on the morning of the test for placement of blood-drawing IV for frequent sampling. Patients will drink 1.75 gm/kg glucose (Glucola) to a maximum of 75 gm. Venous samples for glucose and c-peptide will be drawn from the IV at 0, 30, 60, 90 and 120 minutes. Subjects will be instructed to eat at least 75 gm carbohydrates daily in the week prior to this test.
Ander: Mixed Meal Tolerance Test
Subjects will be instructed to fast after midnight the night prior to the study. Subjects will be admitted to the research unit on the morning of the test for placement of blood-drawing IV for frequent sampling. Subjects will consume 6 kcal/kg (6 ml/kg) Boost High Protein Nutritional Energy Drink (Mead-Johnson) over five minutes to a maximum of 360 ml. Venous samples for glucose, glucagon, GLP-1, GIP, and c-peptide will be drawn at -10, 0, 15, 30, 60, 90, 120, 150, 180, 210, and 240 minutes.
Ander: Hypoglycemic Clamp
All subjects with CF and adult (but not pediatric) controls will undergo one-step hypoglycemic clamp. Subjects will be instructed to fast after midnight the night prior to the study. Subjects will be admitted to the research unit on the morning of the test for placement of blood-drawing IV for frequent sampling and a second IV for infusion of insulin and dextrose.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Glucagon levels
Tijdsspanne: baseline
Glucagon levels in response to to a mixed meal stimulus
baseline

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
C-peptide levels
Tijdsspanne: baseline
C-peptide levels during oral glucose tolerance test and mixed meal tolerance test
baseline
C-peptide levels
Tijdsspanne: 12 months
C-peptide levels during oral glucose tolerance test and mixed meal tolerance test
12 months
Epinephrine levels
Tijdsspanne: baseline
Epinephrine and norepinephrine levels during hypoglycemic clamp
baseline
Epinephrine levels
Tijdsspanne: 12 months
Epinephrine and norepinephrine levels during hypoglycemic clamp
12 months
Norepinephrine levels
Tijdsspanne: baseline
norepinephrine levels during hypoglycemic clamp
baseline
Norepinephrine levels
Tijdsspanne: 12 months
norepinephrine levels during hypoglycemic clamp
12 months
Hypoglycemia unawareness scores
Tijdsspanne: Baseline
Hypoglycemia unawareness scores in subjects during hypoglycemic clamps as measured by the Clarke Hypoglycemia Awareness survey
Baseline
Hypoglycemia unawareness scores
Tijdsspanne: 12 months
Hypoglycemia unawareness scores in subjects during hypoglycemic clamps as measured by the Clarke Hypoglycemia Awareness survey
12 months
GLP-1 and GIP levels
Tijdsspanne: Baseline
GLP-1 and GIP levels in response to mixed meal stimulus
Baseline
GLP-1 and GIP levels
Tijdsspanne: 12 months
GLP-1 and GIP levels in response to mixed meal stimulus
12 months
Glucagon levels
Tijdsspanne: 12 months
Glucagon levels in response to to a mixed meal stimulus and difference from baseline
12 months

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Yale University

Onderzoekers

  • Hoofdonderzoeker: Bracha Goldsweig, MD, Yale University

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start

1 maart 2015

Primaire voltooiing (Werkelijk)

22 juni 2017

Studie voltooiing (Werkelijk)

22 juni 2017

Studieregistratiedata

Eerst ingediend

22 januari 2015

Eerst ingediend dat voldeed aan de QC-criteria

19 maart 2015

Eerst geplaatst (Schatting)

25 maart 2015

Updates van studierecords

Laatste update geplaatst (Werkelijk)

26 juni 2020

Laatste update ingediend die voldeed aan QC-criteria

24 juni 2020

Laatst geverifieerd

1 juni 2020

Meer informatie

Termen gerelateerd aan deze studie

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • 1409014580

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

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