Investigating the Incretin Effect in Cystic Fibrosis

Status Completed

Clinical Trial Summary

Most Cystic fibrosis (CF) patients now commonly live well into adulthood, this means they are progressively accumulating damage to the insulin-secreting cells inside their pancreas. This explains why most adult patients have some degree of abnormal sugar regulation & rates of diabetes rise significantly with age. CF related diabetes is categorically different from other types of diabetes & its development is serious as it heralds a faster decline in lung function & a reduced life expectancy.

The hallmark of abnormal sugar handling in CF is high glucose levels after meals as the damaged pancreas responds abnormally slowly. Over 70% of the initial response of a healthy pancreas is induced, not by glucose alone, but by hormones released from the bowel known as incretins. We want to establish whether incretins are important in blood sugar handling in CF as specific drugs that enhance their effect are now available.

The study hypothesis is that the incretin system will function normally in patients with Cystic Fibrosis. To show this we will measure how much insulin secretion is dependant on incretin hormones in CF patients by comparing levels after a sugary drink test and then an intravenous glucose drip test (run at a rate that mimics the blood sugar levels obtained during the first test to make it a fair comparison ) - as incretins will only be produced in the first test when the sugar passes through the bowel any extra insulin produced will be due to these hormones. To detect resistance to the incretin hormones we will separately measure responses to direct infusions of the hormones themselves. We will explore which components of meals cause incretin hormone release from the bowel wall by measuring blood levels after different types of meals are consumed. Finally we will measure levels of the enzyme that breaks down the incretin hormones (DPP-4) to know if they are deactivated more quickly in people with CF. By describing the incretin system in CF we will considerably improve our understanding of this important condition as well as potentially highlighting new ways to treat it.

Clinical Trial Description

n/a

Study Design

Observational Model: Case Control, Time Perspective: Prospective

Related Conditions & MeSH terms

Clinical Trial Details

NCT number	NCT01975259
Study type	Observational
Source	Liverpool Heart and Chest Hospital NHS Foundation Trust
Contact
Status	Completed
Phase	N/A
Start date	December 2013
Completion date	July 2015

View Details

See also
Status	Clinical Trial	Phase
Completed	`NCT04696198` - Thoracic Mobility in Cystic Fibrosis Care	N/A
Completed	`NCT00803205` - Study of Ataluren (PTC124™) in Cystic Fibrosis	Phase 3
Terminated	`NCT04921332` - Bright Light Therapy for Depression Symptoms in Adults With Cystic Fibrosis (CF) and COPD	N/A
Completed	`NCT03601637` - Safety and Pharmacokinetic Study of Lumacaftor/Ivacaftor in Participants 1 to Less Than 2 Years of Age With Cystic Fibrosis, Homozygous for F508del	Phase 3
Terminated	`NCT02769637` - Effect of Acid Blockade on Microbiota and Inflammation in Cystic Fibrosis (CF)
Recruiting	`NCT06032273` - Lung Transplant READY CF 2: CARING CF Ancillary RCT	N/A
Recruiting	`NCT06030206` - Lung Transplant READY CF 2: A Multi-site RCT	N/A
Recruiting	`NCT06012084` - The Development and Evaluation of iCF-PWR for Healthy Siblings of Individuals With Cystic Fibrosis	N/A
Recruiting	`NCT05392855` - Symptom Based Performance of Airway Clearance After Starting Highly Effective Modulators for Cystic Fibrosis (SPACE-CF)	N/A
Recruiting	`NCT06088485` - The Effect of Bone Mineral Density in Patients With Adult Cystic Fibrosis
Recruiting	`NCT04056702` - Impact of Triple Combination CFTR Therapy on Sinus Disease.
Recruiting	`NCT04039087` - Sildenafil Exercise: Role of PDE5 Inhibition	Phase 2/Phase 3
Completed	`NCT04038710` - Clinical Outcomes of Triple Combination Therapy in Severe Cystic Fibrosis Disease.
Completed	`NCT04058548` - Clinical Utility of the 1-minute Sit to Stand Test as a Measure of Submaximal Exercise Tolerance in Patients With Cystic Fibrosis During Acute Pulmonary Exacerbation	N/A
Completed	`NCT03637504` - Feasibility of a Mobile Medication Plan Application in CF Patient Care	N/A
Recruiting	`NCT03506061` - Trikafta in Cystic Fibrosis Patients	Phase 2
Completed	`NCT03566550` - Gut Imaging for Function & Transit in Cystic Fibrosis Study 1
Recruiting	`NCT04828382` - Prospective Study of Pregnancy in Women With Cystic Fibrosis
Completed	`NCT04568980` - Assessment of Contraceptive Safety and Effectiveness in Cystic Fibrosis
Recruiting	`NCT04010253` - Impact of Bronchial Drainage Technique by the Medical Device Simeox® on Respiratory Function and Symptoms in Adult Patients With Cystic Fibrosis	N/A

Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

Investigating the Incretin Effect in Cystic Fibrosis — IECF

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms