Genetic Modifiers of Cystic Fibrosis Related Diabetes
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ClinicalTrials.gov Identifier: NCT01113216
Recruitment Status :
Enrolling by invitation
First Posted : April 29, 2010
Last Update Posted : May 27, 2020
Johns Hopkins University
Cystic Fibrosis Foundation
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
This research is being done to find the genes and other factors that are responsible for differences among persons with cystic fibrosis. We are particularly interested in the factors that relate to the development of Cystic Fibrosis Related Diabetes (CFRD).
Condition or disease
Cystic Fibrosis Related Diabetes
The study is recruiting people with cystic fibrosis (CF). The medical record is being extracted, and a blood sample is taken for DNA. The DNA samples are tested for variation both at the CFTR gene (the CF gene) and over the entire rest of the genome. Using large numbers of people with CF, and knowing who does and does not have CFRD, we identify genetic variations that associate with CFRD. Knowing these variations allows us to better understand the causes of CFRD, and with enough information, better to predict CFRD and identify people at particularly high or low risk of CFRD. People participating in this study also have the option to participate in related studies of other metabolic traits in CF such as over- and underweight.
Identification of Genes or other factors that influence the development of CFRD [ Time Frame: 5 years ]
Biospecimen Retention: Samples With DNA
Blood will be drawn from study participants and their parents. Two tablespoons of blood (one tablespoon in small children) will be drawn by standard techniques from a vein in the arm. Whenever possible, blood samples for this study will be collected at the same time that it is done for medically needed blood tests. This blood will be used to extract DNA and to establish cell lines that we will store as a permanent source of DNA. We will compare your clinical symptoms with your DNA to see if additional genes that affect CF symptoms can be found. Some serum and plasma will be stored for later testing, as additional knowledge becomes available. Any tests done in the future with your stored blood samples or your DNA will only be to answer questions about genes for CF.
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Layout table for eligibility information
Ages Eligible for Study:
3 Months to 99 Years (Child, Adult, Older Adult)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Individuals affected with Cystic Fibrosis and family members
Any person with Cystic Fibrosis and his/her parents.