Understanding how incretin hormones affect insulin in cystic fibrosis patients

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This research focuses on cystic fibrosis related diabetes (CFRD), a condition that affects many cystic fibrosis patients. The study aims to investigate the role of incretin hormones, which are known to enhance insulin production, in improving insulin secretion from beta cells in patients with CFRD. Participants will receive either incretin hormones or a placebo, and their insulin release will be measured to determine the effectiveness of the treatment. The study will provide valuable insights into the mechanisms of CFRD and potential treatment options.

Why it matters

Who can join: the full rules

Inclusion Criteria:

1. Confirmed diagnosis of cystic fibrosis, defined by positive sweat test or CFTR mutation analysis according to CFF diagnostic criteria,
2. Age greater than or equal to 18y on date of consent
3. Pancreatic insufficiency
4. Recent OGTT consistent with Indeterminate-GT, IGT, CFRD w/o fasting hyperglycemia, or an established diagnosis of CFRD without fasting hyperglycemia
5. For female subjects, negative urine pregnancy test at enrollment.

Control Subjects:

1. No history of cystic fibrosis.
2. Age ≥ 18y on date of consent.
3. Recent OGTT consistent with NGT.
4. For female subjects, negative urine pregnancy test at enrollment.

Exclusion Criteria:

1. Established diagnosis of non-CF diabetes (i.e. T1D) or CFRD with fasting hyperglycemia (fasting glucose greater than126 mg/dL)
2. History of clinically symptomatic pancreatitis within last year
3. Prior lung or liver transplant
4. Severe CF liver disease, as defined by portal hypertension
5. Fundoplication-related dumping syndrome
6. Medical co-morbidities that are not CF-related or are unstable per investigator opinion (i.e. history of bleeding disorders, immunodeficiency)
7. Acute illness or changes in therapy (including antibiotics) within 6 weeks prior to study procedures
8. Treatment with oral or intravenous corticosteroids within 6 weeks of study
9. Hemoglobin less than10g/dL, within 90 days of Visit 1 or at Screening
10. Abnormal renal function, within 90 days of Visit 1 or at Screening; defined as Creatinine greater than 2x upper limit of normal (ULN) or potassium greater than 5.5mEq/L on non-hemolyzed specimen
11. Inability to perform study specific procedures (MMTT, GPA)
12. Subjects, who in study team opinion, may be non-compliant with study procedures.

Control Subjects who will be exposed to GIP only:

1. History of clinically symptomatic pancreatitis.
2. History of liver disease.
3. History of any illness or condition that, in the opinion of the investigator might confound the results of the study or pose an additional risk to the subject.
4. Hemoglobin \<10g/dL, within 90 days of GPA test or at Screening.
5. Abnormal renal function, within 90 days of GPA test or at Screening; defined as creatinine \> 2x upper limit of normal (ULN) or potassium \> 5.5mEq/L on non-hemolyzed specimen.
6. Inability to perform study specific procedures (MMTT, GPA).
7. subjects, who in study team opinion, may be non-compliant with study procedures.
8. elevation of serum amylase or lipase \> 1.5x ULN within 90 days of GPA test.

Where it's running

• Children's Hospital of Philadelphia and University of Pennsylvania
  Philadelphia, Pennsylvania, United States Recruiting

Study contacts

• Principal investigator: Michael R. Rickels, MD, MS — University of Pennsylvania
• Study coordinator: Paola Alvarado
• Email: paola.alvarado@pennmedicine.upenn.edu
• Phone: 215-746-2081

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Other studies for the same condition or treatment. Recruiting studies are listed first.

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.