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Insulin Glargine Vs Standard Insulin Therapy

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00222521
Recruitment Status : Completed
First Posted : September 22, 2005
Last Update Posted : September 22, 2005
Moran, Antoinette, M.D.
Information provided by:
University of Minnesota

Brief Summary:
This Study is designed to determine whether treatment of CFRD with glargine insulin will improve hemoglobin A1c, weight and muscle mass compared to the traditional regimen of bedtime NPH insulin.

Condition or disease Intervention/treatment Phase
Cystic Fibrosis Related Diabetes Drug: Glargine insulin Phase 3

Detailed Description:

The majority of cystic fibrosis (CF) patients now survive beyond childhood, and CF related diabetes (CFRD), due to insulin deficiency, is common. CFRD with fasting hyperglycemia occurs in about 15% of adult CF patients. Standard insulin therapy has relied primarily on meal coverage with rapid-acting insulin. Usually, basal insulin coverage is only provided overnight, with modest doses of NPH insulin. The practice of providing minimal basal insulin in CFRD is based on the fact that most of these patients, unless they are acutely ill, are able to maintain relatively normal blood glucose levels during the day without it. In addition, anecdotal experience has suggested that daytime NPH insulin or once to twice daily ultralente insulin frequently lead to hypoglycemia in the CFRD patient. This practice, which is based on practical clinical considerations, ignores the established relationship between insulin deficiency and clinical deterioration in CFRD. BMI and pulmonary function deteriorate much more rapidly in CF patients with diabetes than in CF patients with normal glucose tolerance. Insulin deficiency leads to increased protein catabolism and fatty acid turnover. The resulting loss of weight and lean body mass contributes to pulmonary disease and clinical decline.

We hypothesize that:

  1. Basal insulin coverage with insulin glargine will improve hemoglobin A1c, weight, and muscle mass in patients with CFRD with fasting hyperglycemia, compared to traditional regimens with less basal insulin.
  2. Because of the peakless action of insulin glargine, this will be accomplished without serious hypoglycemia.

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Study Type : Interventional  (Clinical Trial)
Enrollment : 20 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: Comparison of Insulin Glargine Vs Standard Insulin Therapy in CFRD Without Fasting Hyperglycemia
Study Start Date : April 2003
Study Completion Date : August 2005

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Cystic Fibrosis

Primary Outcome Measures :
  1. Hemoglobin A1c

Secondary Outcome Measures :
  1. BMI
  2. Body composition by DEXA Scan
  3. # Episodes of illness
  4. Quality of life survey

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   12 Years to 0 Years   (Child)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
  1. Inclusion Criteria

    1. CFRD with fasting hyperglycemia (fasting plasma glucose ≥126 mg/dl)

      1. . The diagnosis must be made at a time when the patient is in his/her basal state of health with no evidence of acute exacerbation in the preceding two months.

        a). Acute exacerbation is defined on page 9.

      2. . For patients with onset of diabetes in the preceding 6 months, the hemoglobin A1c must be stable for 3 months prior to study entrance within 5% (0.3% A1c increment).
    2. Age ≥18, post-pubertal (done growing, since change in weight is a study endpoint)
    3. Weight stable within 5% during the previous 3 months as measured in CF clinic
    4. Willingness to attend all study visits and to engage in regular phone or e-mail contact with the study diabetes nurse
    5. Glucocorticoids can have a profound effect on weight, and thus we wish to minimize the occurrence of changing steroid doses during the study period. Patients receiving glucocorticoid therapy will be included in the protocol only if:

      1. . They have been on the same steroid dose for the preceding six months,
      2. . There are no plans to change their steroid dose in the next eight months.
  2. Exclusion Criteria

    1. Pregnancy or plans to become pregnant in the next eight months (because of the changes pregnancy would cause in our study endpoints),
    2. Unwillingness / inability to take multiple injections or to count carbohydrates,
    3. A history of hypoglycemia unawareness (rare in CF),
    4. Plans to start any medication in the next 8 months that might affect weight, such as testosterone or Megace. Patients chronically taking these medications may be included if:

      1. . They have been on the same dose for the preceding six months
      2. . There are no plans to change their dose in the next eight months

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00222521

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United States, Minnesota
University of Minnesota
Minneapolis, Minnesota, United States, 55455
Sponsors and Collaborators
University of Minnesota
Moran, Antoinette, M.D.
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Principal Investigator: Antoinette Moran, MD University of Minnesota
Layout table for additonal information Identifier: NCT00222521    
Other Study ID Numbers: 0205M25461
First Posted: September 22, 2005    Key Record Dates
Last Update Posted: September 22, 2005
Last Verified: September 2005
Keywords provided by University of Minnesota:
Cystic Fibrosis
Additional relevant MeSH terms:
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Cystic Fibrosis
Pathologic Processes
Pancreatic Diseases
Digestive System Diseases
Lung Diseases
Respiratory Tract Diseases
Genetic Diseases, Inborn
Infant, Newborn, Diseases
Insulin Glargine
Hypoglycemic Agents
Physiological Effects of Drugs