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Role of Glucagon In Glucose Control in Cystic Fibrosis Related Diabetes

24 de junio de 2020 actualizado por: 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.

Descripción general del estudio

Estado

Terminado

Condiciones

Intervención / Tratamiento

Descripción detallada

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.

Tipo de estudio

Intervencionista

Inscripción (Actual)

7

Fase

  • Fase temprana 1

Contactos y Ubicaciones

Esta sección proporciona los datos de contacto de quienes realizan el estudio e información sobre dónde se lleva a cabo este estudio.

Ubicaciones de estudio

  • Estados Unidos
    • Connecticut
      • New Haven, Connecticut, Estados Unidos, 06511
        • Yale New Haven Hospital

Criterios de participación

Los investigadores buscan personas que se ajusten a una determinada descripción, denominada criterio de elegibilidad. Algunos ejemplos de estos criterios son el estado de salud general de una persona o tratamientos previos.

Criterio de elegibilidad

Edades elegibles para estudiar

12 años a 45 años (Niño, Adulto)

Acepta Voluntarios Saludables

Sí

Géneros elegibles para el estudio

Todos

Descripción

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.

Plan de estudios

Esta sección proporciona detalles del plan de estudio, incluido cómo está diseñado el estudio y qué mide el estudio.

¿Cómo está diseñado el estudio?

Detalles de diseño

  • Propósito principal: Ciencia básica
  • Asignación: No aleatorizado
  • Modelo Intervencionista: Asignación paralela
  • Enmascaramiento: Ninguno (etiqueta abierta)

Armas e Intervenciones

Grupo de participantes/brazo
Intervención / Tratamiento
Experimental: CF with Normal Glucose Tolerance
Individuals with CF without cystic fibrosis related diabetes
Otro: 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.
Otro: 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.
Otro: 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.
Experimental: Cystic Fibrosis Related Diabetes
Individuals with cystic fibrosis and cystic fibrosis related diabetes
Otro: 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.
Otro: 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.
Otro: 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.
Comparador activo: Control
Age matched control subjects
Otro: 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.
Otro: 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.
Otro: 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.

¿Qué mide el estudio?

Medidas de resultado primarias

Medida de resultado
Medida Descripción
Periodo de tiempo
Glucagon levels
Periodo de tiempo: baseline
Glucagon levels in response to to a mixed meal stimulus
baseline

Medidas de resultado secundarias

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

Colaboradores e Investigadores

Aquí es donde encontrará personas y organizaciones involucradas en este estudio.

Patrocinador

Yale University

Investigadores

  • Investigador principal: Bracha Goldsweig, MD, Yale University

Fechas de registro del estudio

Estas fechas rastrean el progreso del registro del estudio y los envíos de resultados resumidos a ClinicalTrials.gov. Los registros del estudio y los resultados informados son revisados ​​por la Biblioteca Nacional de Medicina (NLM) para asegurarse de que cumplan con los estándares de control de calidad específicos antes de publicarlos en el sitio web público.

Fechas importantes del estudio

Inicio del estudio

1 de marzo de 2015

Finalización primaria (Actual)

22 de junio de 2017

Finalización del estudio (Actual)

22 de junio de 2017

Fechas de registro del estudio

Enviado por primera vez

22 de enero de 2015

Primero enviado que cumplió con los criterios de control de calidad

19 de marzo de 2015

Publicado por primera vez (Estimar)

25 de marzo de 2015

Actualizaciones de registros de estudio

Última actualización publicada (Actual)

26 de junio de 2020

Última actualización enviada que cumplió con los criterios de control de calidad

24 de junio de 2020

Última verificación

1 de junio de 2020

Más información

Términos relacionados con este estudio

Términos MeSH relevantes adicionales

Otros números de identificación del estudio

  • 1409014580

Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .

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