Glucose Tolerance in Children With Cystic Fibrosis (GluTolCF)

Christoph Saner

Status: Completed

Conditions: Cystic Fibrosis; Glucose Intolerance

Treatments: Other: Diagnostics for glucose tolerance with 3 different methods.

Study type: Observational

Funder types: Other

Identifiers

NCT02569229

KEK BE: 102/15 (Other Identifier)

EKNZ 2015-143

Details and patient eligibility

About

The aim is to describe the association of glucose tolerance measured with three different tools (continuous glucose measurement system - CGMS, oral glucose tolerance testing - OGTT and optional intravenous glucose tolerance testing -IVGTT) with parameters out of lung function and anthropometric parameters in patients with cystic fibrosis.

Full description

Patients with cystic fibrosis (CF) with progressing disease are developing a glucose tolerance which resembles the metabolic state of a diabetic patient because of increasing impairment of endocrine pancreatic function. The prevalence of this diabetic metabolic state is increasing with age, reaching around 20% at the age of 20 years.

Over the last decade, research has already highlighted the negative influence of cystic fibrosis related diabetes (CFRD) on morbidity and mortality after the diagnosis of this condition.

As the deterioration in nutritional status and lung function can already be noticed 2-6 years before the onset of CFRD, the importance of early diagnosis in glucose abnormalities and its treatment therefore is crucial.

The currently used method to evaluate altered glucose metabolism in patients with CF is an annual oral glucose tolerance test (OGTT) with the glucose value after 120 min after oral ingestion of glucose-fluid as reference. This method may detect CFRD much later than we see deterioration of lung function and weight loss. This deterioration and the mortality in CF is related to CFRD.

An alternative diagnostic tool that has gained increasing attention and that is already routinely used in pediatric patients with diabetes mellitus type I is the continuous glucose monitoring system (CGMS) which was shown to be much more sensitive in detecting glucose abnormalities. To assess pancreatic endocrine dysfunction - the pathophysiologic cause for glucose intolerance - intravenous glucose tolerance testing (IVGTT) is the gold standard.

The investigator's aim is to describe the association of glucose tolerance measured with three different tools/assessment procedures (CGMS, OGTT and optional IVGTT) with lung function and anthropometric parameters.

Enrollment: 14 patients

Sex: All

Ages: 10 to 20 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Patients with confirmed cystic fibrosis aged between 10-20 years, under medical treatment at the University Children's Hospital Basel UKBB and at the University Children's Hospital, Inselspital Bern

Exclusion criteria

• Patients being under medical treatment with systemically administered glucocorticoid drugs or intravenously administered antibiotic treatment within 6 weeks before glucose tolerance testing.
• Patients with acute pulmonary exacerbation, defined by a pediatric pneumologist

Trial design

14 participants in 1 patient group

Patients with Cystic Fibrosis

Description:

Patients between 10-20 years of age with genetically determined cystic fibrosis followed at the university children's hospital Basel and university children's hospital Kinderklinik Bern, Switzerland. All patients will get the diagnostics for glucose tolerance with 3 different methods (CGMS, OGTT and optionally IVGTT).

Treatment:

Other: Diagnostics for glucose tolerance with 3 different methods.