Cystic Fibrosis Related DiabetesNCT01113216
Genetic Modifiers of Cystic Fibrosis Related Diabetes
An observational study of Cystic Fibrosis Related Diabetes, run by Johns Hopkins University at 3 sites in United States.
Trial summary
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). Read more about this study
- Who is it for?
- Ages 3 months to 99 yearsHealthy volunteers can take part
- Conditions the study is for
- Cystic Fibrosis Related Diabetes
- How many people
- 1,500 participants
- Where
- 3 sitesUnited States
- Study dates
- Apr 2008to Apr 2030
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 3 months to 99 years
- All sexes
- Healthy volunteers accepted
- Child, Adult, Older adult
Study population: Individuals affected with Cystic Fibrosis and family members
Who may be able to join
- Any person with Cystic Fibrosis and his/her parents.
Who cannot join
- None
Trial locations and contacts
3 sites in 1 country. Contact the study team or a site near you to ask about taking part.
United States3 sites
Johns Hopkins Medicine
Baltimore, Maryland, 21287
Children's Memorial Hospital
Chicago, Illinois
University of Minnesota
Minneapolis, Minnesota
About this study
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).
Read the detailed description
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 cystic fibrosis transmembrane conductance regulator (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.
- Conditions
- Cystic Fibrosis Related Diabetes
- Keywords
- CF, CFRD, Diabetes, Genetic Modifiers
- Medical subject headings
- Diabetes Mellitus
What is being measured
The primary outcome is the main question the study is designed to answer.
Identification of Genes or other factors that influence the development of CFRD
Measured: 5 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted29 Apr 2010 (estimated)
- Study startApr 2008
- Primary completionApr 2030 (estimated)
- Study completionApr 2030 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (6)Papers the sponsor has linked to this study.
- Other trials for Cystic Fibrosis Related DiabetesStudies of the same condition, open and under way.
- More trials run by Johns Hopkins UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Family based
- Time perspective
- Prospective
- Enrolment
- 1,500 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Johns Hopkins University
- Sponsor type
- University, hospital or other
- Collaborators
- Cystic Fibrosis Foundation, National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), University of Minnesota, Northwestern University
- Responsible party
- Sponsor
- Investigators
- Scott M Blackman, MD, PhD, Principal investigator, Johns Hopkins University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT01113216
- Sponsor's protocol ID
- NA_00005921
- Other IDs
- K23DK083551, CFF-CFRD01
- Status last verified
- Apr 2026
- First submitted
- 28 Apr 2010
- Last updated
- 13 Apr 2026
- Results posted
- No
- Data monitoring committee
- No
- Individual data sharing
- No
Publications
Ling H, Raraigh KS, Pugh EW, Aksit MA, Zhang P, Pace RG, Faino AV, Bamshad MJ, Gibson RL, O'Neal W, Knowles MR, Blackman SM, Cutting GR; CF Genome Project. Genetic modifiers of body mass index in individuals with cystic fibrosis. Am J Hum Genet. 2024 Oct 3;111(10):2203-2218. doi: 10.1016/j.ajhg.2024.08.004. Epub 2024 Sep 10.
PubMed 39260370Aksit MA, Pace RG, Vecchio-Pagan B, Ling H, Rommens JM, Boelle PY, Guillot L, Raraigh KS, Pugh E, Zhang P, Strug LJ, Drumm ML, Knowles MR, Cutting GR, Corvol H, Blackman SM. Genetic Modifiers of Cystic Fibrosis-Related Diabetes Have Extensive Overlap With Type 2 Diabetes and Related Traits. J Clin Endocrinol Metab. 2020 May 1;105(5):1401-15. doi: 10.1210/clinem/dgz102.
PubMed 31697830Aksit MA, Ling H, Pace RG, Raraigh KS, Onchiri F, Faino AV, Pagel K, Pugh E, Stilp AM, Sun Q, Blue EE, Wright FA, Zhou YH, Bamshad MJ, Gibson RL, Knowles MR, Cutting GR, Blackman SM; CF Genome Project. Pleiotropic modifiers of age-related diabetes and neonatal intestinal obstruction in cystic fibrosis. Am J Hum Genet. 2022 Oct 6;109(10):1894-1908. doi: 10.1016/j.ajhg.2022.09.004.
PubMed 36206743Blackman SM, Hsu S, Vanscoy LL, Collaco JM, Ritter SE, Naughton K, Cutting GR. Genetic modifiers play a substantial role in diabetes complicating cystic fibrosis. J Clin Endocrinol Metab. 2009 Apr;94(4):1302-9. doi: 10.1210/jc.2008-2186. Epub 2009 Jan 6.
PubMed 19126627Blackman SM, Hsu S, Ritter SE, Naughton KM, Wright FA, Drumm ML, Knowles MR, Cutting GR. A susceptibility gene for type 2 diabetes confers substantial risk for diabetes complicating cystic fibrosis. Diabetologia. 2009 Sep;52(9):1858-65. doi: 10.1007/s00125-009-1436-2. Epub 2009 Jul 8.
PubMed 19585101Blackman SM, Commander CW, Watson C, Arcara KM, Strug LJ, Stonebraker JR, Wright FA, Rommens JM, Sun L, Pace RG, Norris SA, Durie PR, Drumm ML, Knowles MR, Cutting GR. Genetic modifiers of cystic fibrosis-related diabetes. Diabetes. 2013 Oct;62(10):3627-35. doi: 10.2337/db13-0510. Epub 2013 May 13.
PubMed 23670970
Study at a glance
From the registry record, last updated by the sponsor on 13 Apr 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Genetic Modifiers of Cystic Fibrosis Related Diabetes
- ClinicalTrials.gov ID
- NCT01113216
- Acronym / sponsor ID
- NA_00005921
- Conditions
- Cystic Fibrosis Related Diabetes
- Keywords
- CF, CFRD, Diabetes, Genetic Modifiers
- Study type
- Observational
- Recruitment status
- Enrolling by invitation
- Enrolment
- 1,500 participants (estimated)
- Lead sponsor
- Johns Hopkins UniversityUniversity, hospital or other
- Collaborators
- Cystic Fibrosis Foundation, National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), University of Minnesota, Northwestern University
- Study start
- Apr 2008
- Primary completion
- Apr 2030 (estimated)
- Study completion
- Apr 2030 (estimated)
- First posted
- 29 Apr 2010 (estimated)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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).
Detailed description
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 cystic fibrosis transmembrane conductance regulator (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.
Study design
- Observational model
- Family based
- Time perspective
- Prospective
Who may qualify
- Ages
- 3 months to 99 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult, Older adult
- Study population
- Individuals affected with Cystic Fibrosis and family members
Key inclusion criteria (1 listed)
- Any person with Cystic Fibrosis and his/her parents.
Key exclusion criteria (1 listed)
- None
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Identification of Genes or other factors that influence the development of CFRD
Time frame: 5 years
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 13 Apr 2026.
- Background: PubMed 39260370Ling H, Raraigh KS, Pugh EW, Aksit MA, Zhang P, Pace RG, Faino AV, Bamshad MJ, Gibson RL, O'Neal W, Knowles MR, Blackman SM, Cutting GR; CF Genome Project. Genetic modifiers of body mass index in individuals with cystic fibrosis. Am J Hum Genet. 2024 Oct 3;111(10):2203-2218. doi: 10.1016/j.ajhg.2024.08.004. Epub 2024 Sep 10.
- Background: PubMed 31697830Aksit MA, Pace RG, Vecchio-Pagan B, Ling H, Rommens JM, Boelle PY, Guillot L, Raraigh KS, Pugh E, Zhang P, Strug LJ, Drumm ML, Knowles MR, Cutting GR, Corvol H, Blackman SM. Genetic Modifiers of Cystic Fibrosis-Related Diabetes Have Extensive Overlap With Type 2 Diabetes and Related Traits. J Clin Endocrinol Metab. 2020 May 1;105(5):1401-15. doi: 10.1210/clinem/dgz102.
- Background: PubMed 36206743Aksit MA, Ling H, Pace RG, Raraigh KS, Onchiri F, Faino AV, Pagel K, Pugh E, Stilp AM, Sun Q, Blue EE, Wright FA, Zhou YH, Bamshad MJ, Gibson RL, Knowles MR, Cutting GR, Blackman SM; CF Genome Project. Pleiotropic modifiers of age-related diabetes and neonatal intestinal obstruction in cystic fibrosis. Am J Hum Genet. 2022 Oct 6;109(10):1894-1908. doi: 10.1016/j.ajhg.2022.09.004.
- Results publication: PubMed 19126627Blackman SM, Hsu S, Vanscoy LL, Collaco JM, Ritter SE, Naughton K, Cutting GR. Genetic modifiers play a substantial role in diabetes complicating cystic fibrosis. J Clin Endocrinol Metab. 2009 Apr;94(4):1302-9. doi: 10.1210/jc.2008-2186. Epub 2009 Jan 6.
- Results publication: PubMed 19585101Blackman SM, Hsu S, Ritter SE, Naughton KM, Wright FA, Drumm ML, Knowles MR, Cutting GR. A susceptibility gene for type 2 diabetes confers substantial risk for diabetes complicating cystic fibrosis. Diabetologia. 2009 Sep;52(9):1858-65. doi: 10.1007/s00125-009-1436-2. Epub 2009 Jul 8.
- Results publication: PubMed 23670970Blackman SM, Commander CW, Watson C, Arcara KM, Strug LJ, Stonebraker JR, Wright FA, Rommens JM, Sun L, Pace RG, Norris SA, Durie PR, Drumm ML, Knowles MR, Cutting GR. Genetic modifiers of cystic fibrosis-related diabetes. Diabetes. 2013 Oct;62(10):3627-35. doi: 10.2337/db13-0510. Epub 2013 May 13.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Scott M Blackman, MD, PhD principal investigator
Johns Hopkins University
3 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Cystic Fibrosis Related Diabetes, run by Johns Hopkins University at 3 sites in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: enrolling by invitation, as of the sponsor's last update on 13 Apr 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 3 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Identification of Genes or other factors that influence the development of CFRD (time frame: 5 years). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT01113216, which also lists 6 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 13 Apr 2026.